AIPAS LN-ALX124-13S2P Rechargeable Li-ion Battery Pack Owner’s Manual

LN-ALX124-13S2P Rechargeable Li-ion Battery Pack

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Specifications:

• Model/Type: LN-ALX124-13S2P

• Rated Rating: 48V 10AH 480Wh

• Standard Charging Current: 2000mA

• Standard Discharge Current: 2000mA

• Max. Charging Current: 3000mA

• Max. Discharge Current: 20000mA

• Limited Charging Voltage: 54.6V

• Appearance: Silvery, Prismatic

• Cut-off Voltage: 37.7V

• Classification Cell: Small Lithium ion
  Batteries

• Model number of the cell: INR21700-50E

• Rated Rating of the cell: 3.7V 5000mAh
  18.5Wh

• Cell’s Max. Discharge Current: 14700mA

• Limited Charging Voltage of the cell:
  4.2V

• Cell number per battery: 26PCS, 13S2P

• Cut-off Voltage of the cell: 2.5V

Product Usage Instructions:

Charging the Battery Pack:

1. Use the provided charger with an output matching the
   specifications of the battery pack.

2. Connect the charger to a power source and then to the battery
   pack.

3. Ensure that the charging voltage does not exceed the limited
   charging voltage of 54.6V.

Discharging the Battery Pack:

1. Connect the battery pack to the device you intend to
   power.

2. Avoid discharging the battery below the cut-off voltage of
   37.7V to prevent damage.

Frequently Asked Questions (FAQ):

Q: What is the maximum discharge current of the battery

pack?

A: The maximum discharge current of the battery pack is
20000mA.

Q: How many cells are there per battery in the pack?

A: There are a total of 26 cells, arranged in a configuration of
13 series and 2 parallel (13S2P) per battery pack.

Q: Can I use a charger with higher current output to charge the

battery pack?

A: It is recommended to use a charger with an output current
within the specified limits to ensure safe and efficient charging
of the battery pack.

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UN38.3 Test Report
Report No.: P23042707701 Name of Products: Rechargeable Li-ion battery pack Model and Spec.: LN-ALX124-13S2P 48V 10AH 480Wh
Applicant: GALAXY BICYCLE CO., LTD. Manufacturer: LN Energy Technology Co., Ltd Date of issue 2023-05-15
Shenzhen NTEK New Energy Technology Co., Ltd.

Applicant Address of Applicant
Manufacturer Address of manufacturer

Page 2 of 15 GALAXY BICYCLE CO., LTD.

Report No./. P23042707701

New material industry base, Gonghe districts, heshan city, Guangdong province, China.

LN Energy Technology Co., Ltd

301 and 302, Block 11, Phase ll, Tianfulai lnternational Industrial City, No. 37, Changbao West Road, Rongli Community, Ronggui Street, Shunde District, Foshan City, Guangdong Province

Name of Products Model/Type Ratings

Rechargeable Li-ion battery pack LN-ALX124-13S2P 48V 10AH 480Wh

Date of receipt of test item 2023-05-02

Completion Date

2023-05-13

Tested according to: United Nations Manual of Tests and Criteria, PART III, section 38.3 Lithium metal and lithium ion batteries, the seventh revised edition amendment 1(ST/SG/AC.10/11/Rev.7/Amend.1).

Tests performed: Test T.1: Altitude simulation
Test T.2: Thermal Test Test T.3: Vibration Test T.4: Shock

Test T.5: External short circuit Test T.6: Impact Test T.7: Overcharge Test T.8: Forced discharge

Test Conclusion : The Rechargeable Li-ion battery pack submitted by GALAXY BICYCLE CO., LTD. is tested according
to the United Nations Manual of Tests and Criteria, PART III, section 38.3 Lithium metal and lithium ion batteries, the seventh revised edition amendment 1 (ST/SG/AC.10/11/Rev.7/Amend.1).
Test results: PASS

Tested by: Reviewed by:

Lix Xu Jony j Huang

Approved by:

Jesse Zhang

Shenzhen NTEK New Energy Technology Co., Ltd. Tel: +86(0)-755-3699 5529 http://www.ntekbat.org.cn

Seal of NTEK RE-093 A/0

Page 3 of 15

General product information: Battery

Model/Type

LN-ALX124-13S2P

Rated Rating

Report No./ P23042707701
48V 10AH 480Wh

Standard Charging Current 2000mA Standard Discharge Current 2000mA

Max. Charging Current Max. Discharge Current

3000mA
20000mA

Limited Charging Voltage 54.6V

Appearance

Silvery, Prismatic

Cut-off Voltage

37.7V

49×105×459 Dimension (T×W×H)(mm)

Classification Cell

Small Lithium ion Batteries

Model number of the cell

INR21700-50E

Rated Rating

3.7V 5000mAh 18.5Wh

Cell’s Max. Discharge Current

14700mA

Limited Charging Voltage

4.2V

Cell number per battery

26PCS, 13S2P

Cut-off Voltage

2.5V

Sample description

Type Batteries
Component cells

Sample No. NE230424235001-X*

Sample Sub-No. State of samples

001~004 019~022 005~008 023~026
009~013

Fully charged at first cycle
Fully charged after 25 cycles 50% of the design rated capacity at first cycles

014~018

50% of the design rated capacity after 25 cycles

027~036 037~046

Fully discharged at first cycle Fully discharged after 25 cycles

• “X” contained in Sample No. represents Sample Sub-No., it consists of three digit.

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RE-093 A/0

Page 4 of 15

Report No./ P23042707701

Test environment condition: Room temperature: 15°C-25°C; Room humidity: 40-70% Remark None Summaries of testing : All rechargeable battery types, including those composed of previously tested cells, shall be subjected to tests T.1 to T.5 and T.7.
Tests T.1 to T.5 are conducted in sequence on the same battery. Tests T.6 and T.8 are conducted using not otherwise tested batteries. Test T.7 may be conducted using undamaged batteries previously used in Tests T.1 to T.5 for purposes of testing on cycled batteries.
In order to quantify the mass loss, the following procedure is provided:

Mass loss(%)=(M1-M2)/M1×100

Where M1 is the mass before the test and M2 is the mass after the test. When mass loss does not exceed the values in Table below, it is considered as “no mass loss”.

Mass M of cell or battery

Mass loss limit

M1g 1gM75g
M75g

0.5% 0.2% 0.1%

In tests T.1 to T.4, batteries meet this requirement if there is no leakage, no venting, no disassembly, no

rupture and no fire and if the open circuit voltage of each test battery after testing is not less than 90% of its

voltage immediately prior to this procedure.

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RE-093 A/0

Test Procedure

Page 5 of 15 Pre-conditioning

Report No./ P23042707701

Marking NE230424235001-X

Sample Sub-No. 001~008

Sample Sub-No. 009~018

Sample Sub-No. 019~026

Sample Sub-No. 027~046

Altitude simulation

Thermal test Vibration Shock
External short circuit

Impact

Overcharge

Forced discharge

Finish

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RE-093 A/0

Page 6 of 15
Photos of sample

Report No./ P23042707701

Shenzhen NTEK New Energy Technology Co., Ltd. Tel: +86(0)-755-3699 5529 http://www.ntekbat.org.cn

RE-093 A/0

Page 7 of 15
Photos of sample

Report No./ P23042707701

Shenzhen NTEK New Energy Technology Co., Ltd. Tel: +86(0)-755-3699 5529 http://www.ntekbat.org.cn

RE-093 A/0

Page 8 of 15

Report No./ P23042707701

Test results :
Test T.1: Altitude simulation
Test method : Batteries are stored at a pressure of 11.6 kPa or less for at least six hours at ambient temperature (20 ± 5°C).
Requirement : Batteries meet this requirement if there is no leakage, no venting, no disassembly, no rupture and no fire and if the open circuit voltage of each test battery after testing is not less than 90% of its voltage immediately prior to this procedure.

Test Data showed in table below

Sample Sub-No.
001 002 003 004 005 006 007 008

Prior to test

Mass (g)
2565.9 2563.3 2566.2 2567.2 2564.7 2565.4 2564.5 2564.6

Voltage (V)
54.33 54.34 54.33 54.34 54.35 54.34 54.34 54.33

After test

Mass (g)
2565.9 2563.3 2566.2 2567.2 2564.7 2565.4 2564.5 2564.6

Voltage (V)
54.33 54.34 54.33 54.34 54.35 54.34 54.34 54.33

Mass loss (%)
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Voltage after test/ voltage prior to test
% 100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0

Results
PASS PASS PASS PASS PASS PASS PASS PASS

Notes : After the test, there is no leakage, no venting, no disassembly, no rupture and no fire. Room temperature : 21.7°C

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RE-093 A/0

Test T.2: Thermal test

Page 9 of 15

Report No./ P23042707701

Test method Batteries are to be stored for at least six hours at a test temperature equal to 72 ± 2°C, followed by storage for at least six hours at a test temperature equal to -40 ± 2°C. The maximum time interval between test temperature extremes is 30 minutes. This procedure is to be repeated 10 times, after which all test batteries are to be stored for 24 hours at ambient temperature (20 ± 5°C).

Requirement Batteries meet this requirement if there is no leakage, no venting, no disassembly, no rupture and no fire and if the open circuit voltage of each test battery after testing is not less than 90% of its voltage immediately prior to this procedure.

Test Data showed in table below

Sample

Prior to test

Sub-No.
001 002 003 004 005 006 007 008

Mass (g)
2565.9 2563.3 2566.2 2567.2 2564.7 2565.4 2564.5 2564.6

Voltage (V)
54.33 54.34 54.33 54.34 54.35 54.34 54.34 54.33

After test

Mass (g)
2565.1 2562.4 2565.5 2566.4 2564.1 2564.6 2563.6 2563.9

Voltage (V)
53.75 53.74 53.73 53.77 53.75 53.75 53.74 53.76

Mass loss (%)
0.031 0.035 0.027 0.031 0.023 0.031 0.035 0.027

Voltage after test/ voltage prior to test
(%) 98.93
98.90
98.90
98.95
98.90
98.91
98.90
98.95

Results
PASS PASS PASS PASS PASS PASS PASS PASS

Notes : After the test, there is no leakage, no venting, no disassembly, no rupture and no fire. Room temperature : 21.7°C

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RE-093 A/0

Test T.3: Vibration

Page 10 of 15

Report No./ P23042707701

Test method Batteries are firmly secured to the platform of the vibration machine without distorting the cells in such a manner as to faithfully transmit the vibration. The vibration shall be a sinusoidal waveform with a logarithmic sweep between 7 Hz and 200 Hz and back to 7 Hz traversed in 15 minutes. This cycle shall be repeated 12 times for a total of 3 hours for each of three mutually perpendicular mounting positions of the cell. One of the directions of vibration must be perpendicular to the terminal face. The logarithmic frequency sweep is as follows: from 7 Hz a peak acceleration of 1 gn is maintained until 18 Hz is reached. The amplitude is then maintained at 0.8 mm (1.6 mm total excursion) and the frequency increased until a peak acceleration of 8 gn occurs (approximately 50 Hz). A peak acceleration of 8 gn is then maintained until the frequency is increased to 200 Hz.

Requirement Batteries meet this requirement if there is no leakage, no venting, no disassembly, no rupture and no fire during the test and after the test and if the open circuit voltage of each test battery directly after testing in its third perpendicular mounting position is not less than 90% of its voltage immediately prior to this procedure.

Test Data showed in table below

Sample

Prior to test

Sub-No.
001 002 003 004 005 006 007 008

Mass (g)
2565.1 2562.4 2565.5 2566.4 2564.1 2564.6 2563.6 2563.9

Voltage (V)
53.75 53.74 53.73 53.77 53.75 53.75 53.74 53.76

After test

Mass (g)
2565.1 2562.4 2565.5 2566.4 2564.1 2564.6 2563.6 2563.9

Voltage (V)
53.74 53.74 53.73 53.76 53.75 53.74 53.74 53.75

Mass loss (%)
0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Voltage after test/ voltage prior to test
(%) 99.98
100.0
100.0 99.98
100.0
99.98
100.0
99.98

Results
PASS PASS PASS PASS PASS PASS PASS PASS

Notes : During and after the test, there is no leakage, no venting, no disassembly, no rupture and no fire. Room temperature : 21.4°C

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RE-093 A/0

Test T.4: Shock

Page 11 of 15

Report No./ P23042707701

Test method Batteries are secured to the testing machine by means of a rigid mount which will support all mounting surfaces of each test battery. Each battery is subjected to a half-sine shock of peak acceleration depending on the mass of the battery. The pulse duration is 6 milliseconds. Each battery is subjected to three shocks in the positive direction followed by three shocks in the negative direction of three mutually perpendicular mounting positions of the battery for a total of 18 shocks.

The formula below is provided to calculate the appropriate minimum peak accelerations.

Mass of the batter

Minimum peak acceleration

Pulse duration

4.482 kg

150 gn

6 ms

4.482 kg

not applicable

6 ms

• Mass is expressed in kilograms. Requirement : Batteries meet this requirement if there is no leakage, no venting, no disassembly, no rupture and no fire and if the open circuit voltage of each test battery after testing is not less than 90% of its voltage immediately prior to this procedure.

Test Data showed in table below

Sample Sub-No.
001

Prior to test

Mass
(g) 2565.1

Voltage
(V) 53.74

After test

Mass
(g) 2565.1

Voltage
(V) 53.74

Mass loss (%)
0.000

Voltage after test/ voltage prior to test
(%)
100.0

002

2562.4 53.74 2562.4 53.74

0.000

100.0

003

2565.5 53.73 2565.5 53.73

0.000

100.0

004

2566.4 53.76 2566.4 53.76

0.000

100.0

005

2564.1 53.75 2564.1 53.75

0.000

100.0

006

2564.6 53.74 2564.6 53.74

0.000

100.0

007

2563.6 53.74 2563.6 53.74

0.000

100.0

008

2563.9 53.75 2563.9 53.75

0.000

100.0

Notes : After the test, there is no leakage, no venting, no disassembly, no rupture and no fire. Room temperature : 21.6°C

Results
PASS PASS PASS PASS PASS PASS PASS PASS

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RE-093 A/0

Test T.5: External short circuit

Page 12 of 15

Report No./ P23042707701

Test method : Batteries to be tested are heated for a period of time necessary to reach a homogeneous stabilized temperature of 57 ± 4 °C, measured on the external case. This period of time depends on the size and design of the battery and is assessed and documented. Then the battery at 57 ± 4 °C is subjected to one short circuit condition with a total external resistance of less than 0.1 ohm. This short circuit condition is continued for at least one hour after the battery external case temperature has returned to 57 ± 4 °C. The short circuit and cooling down phases are conducted at least at ambient temperature.

Requirement : Batteries meet this requirement if their external temperature does not exceed 170°C and there is no disassembly, no rupture and no fire during the test and within six hours after test.

Test data showed in table below

Sample Sub-No.
001 002 003 004 005 006 007 008

Maximum outer casing temperature (°C) 56.7 56.8 56.9 57.1 56.7 56.8 56.7 56.8

Results
PASS PASS PASS PASS PASS PASS PASS PASS

Notes : There is no disassembly, no rupture and no fire during the test and within six hours after test. Room temperature : 22.7°C

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RE-093 A/0

Test T.6: Impact

Page 13 of 15

Report No./ P23042707701

Test method : Each component cell is to be placed on a flat smooth surface. A 15.8 mm ±0.1 mm diameter, at least 6 cm long, or the longest dimension of the cell, whichever is greater, Type 316 stainless steel bar is to be placed across the centre of the sample. A 9.1 kg ± 0.1 kg mass is to be dropped from a height of 61 ± 2.5 cm at the intersection of the bar and sample in a controlled manner using a near frictionless, vertical sliding track or channel with minimal drag on the falling mass. The vertical track or channel used to guide the falling mass shall be oriented 90 degrees from the horizontal supporting surface. The test sample is to be impacted with its longitudinal axis parallel to the flat surface and perpendicular to the longitudinal axis of the 15.8 mm ± 0.1mm diameter curved surface lying across the centre of the test sample. Each sample is to be subjected to only a single impact.

Requirement : Component cells meet this requirement if their external temperature does not exceed 170°C and there is no disassembly and no fire during the test and within six hours after the test.

Test data showed in table below

Sample Sub-No.
009 010 011 012 013 014 015 016 017 018

Maximum outer casing temperature (°C) 23.1 24.2 23.7 23.4 24.1 23.9 23.8 23.2 23.4 23.1

Results
PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS

Notes : There is no disassembly, no rupture and no fire during the test and within six hours after the test. Room temperature : 21.7°C

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RE-093 A/0

Test T.7: Overcharge

Page 14 of 15

Report No./ P23042707701

Test method : The charge current is twice the manufacturer’s recommended maximum continuous charge current. The minimum voltage of the test is as follows:
When the manufacturer’s recommended charge voltage is not more than 18V, the minimum voltage of the test is the lesser of two times the maximum charge voltage of the battery or 22V.
When the manufacturer’s recommended charge voltage is more than 18V, the minimum voltage of the test shall be 1.2 times the maximum charge voltage. Tests are to be conducted at ambient temperature. The duration of the test is 24 hours.
Requirement : Batteries meet this requirement if there is no disassembly and no fire during the test and within seven days after the test.

Test data showed in table below Overcharge current (mA)……………………: Overcharge voltage (Vdc)…………………..: Duration of the test (hours) ……………..:
Sample Sub-No. 019 020 021 022 023 024 025 026

2×3000=6000mA 1.2×54.6=65.52V
24 hours Results PASS PASS PASS PASS PASS PASS PASS PASS

Notes : There is no disassembly and no fire during the test and within seven days after the test. Room temperature : 21.7°C

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RE-093 A/0

Test T.8: Forced discharge

Page 15 of 15

Report No./ P23042707701

Test method : Each component cell is forced discharged at ambient temperature by connecting it in series with a 12V D.C. power supply at an initial current equal to the maximum discharge current specified by the manufacturer. The specified discharge current is to be obtained by connecting a resistive load of the appropriate size and rating in series with the test cell. Each cell is forced discharged for a time interval (in hours) equal to its rated capacity divided by the initial test current (in ampere).

Requirement : Component cells meet this requirement if there is no disassembly and no fire during the test and within seven days after the test.

Test data showed in table below Initial current (mA)………………………………..:
Supply voltage (Vdc) …………………………….:
Time interval (Minutes)………………………….:

Sample Sub-No.

Results

027

PASS

028

PASS

029

PASS

030

PASS

031

PASS

032

PASS

033

PASS

034

PASS

035

PASS

036

PASS

14700mA 12Vdc 21 Minutes
Sample Sub-No.
037 038 039 040 041 042 043 044 045 046

Results
PASS PASS PASS PASS PASS PASS PASS PASS PASS PASS

Notes : There is no disassembly and no fire during the test and within seven days after the test. Room temperature : 21.1°C

End of Test Report

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RE-093 A/0

Important Notice
1. The test report is invalid without the Report Seal of NTEK and Paging seal of NTEK. 2. Nobody is allowed to photocopy or partly photocopy this test report without written
permission of NTEK. 3. The test report is invalid without the signatures of Approver, Reviewer and Testing
engineer. 4. The report is invalid when anything of following happens ­ illegal transfer, reproduce,
embezzlement, imposture, modification or tampering in any media form. 5. Objections to the test report must be submitted to NTEK within 15 days. 6. The test report is valid for the tested samples only. 7. The Chinese contents in this report are only for reference.

Shenzhen NTEK New Energy Technology Co., Ltd. Address 1: Room 101, Building C, Fenda Hi-Tech Park, Sanwei Community, Hangcheng Subdistrict, Bao’an District, Shenzhen, Guangdong, China. Address 2: 1/F., Building D, Huashengtai Technology Building, No.36, Hangkong Road, Hangcheng Street, Bao’an District, Shenzhen, Guangdong, China.

Tel +86(0)-755-3699 5529

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