Low temperature Lithium Polymer Battery

Low temperature Lithium Polymer Battery
 

Product description:

low Temperature lithium polymer batteries can work at -40℃, here we give you lithium polymer battery pack ATB6560158 29.4V 40Ah as an example (other sizes at your request) :

A, Introduction:

Together with technology's imporvement and actual demanding of low temperature batteries, there are many field in great demand of low temperature rechargebale ones.

Currently, almost all of batteries of China battery line can stand low temperature rate at minus 30 degrees.

While ATB's low tem battery can stand at most minus 40 degrees.

B, For instance, ATB6560158 battery packs, our's low tem version have following charcteristics as well.

Scope:


This document is made according to customer parameter requirements, it describes the Product Specification of Chargeable Lithium Polymer Battery produced by AIRTAKERBATTERY

The temporary specification is only for the customer's reference, not regared as the basis of the IQC and mutual confession

C, Specification

No. Item Spec Note
1 model 6560158/40Ah 8P7S
2 Charge Voltage 29.4V (single cell 4.2V)
3 Nominal Voltage 25.9V The average value of voltage during the discharge period (with standard charge and discharge) . When shipping, the voltage without load is between 25.2V and 26.95V.
4 Nominal Capacity 8P: 40Ah Min: 38Ah Nominal Capacity refer to the capacity of 0.2C discharge to 19.25V cut-off voltage, after charging with standard method.
5 Cycle Life ≥300 Times

One cycle refer to one charge period and then one discharge period.

Test condition:

Charge: 0.2C to 29.4V

Discharge: 0.2C to 19.25V

The cycle life is the cycle times when the discharge capacity is about 75% of the rated capacity.
6 Impedance

Cell Impedance:

≤30mΩ; Assemblage Impedance: ≤80mΩ
After Standard charging, measure the internal resistance with AC1KHz (while measuring, clip near 2/3 place of the anode and the cathode.) ;Measure two sides of the drawing line after assembling. (Red B+, Black B-)
7 Max. Charge Current 0.5C
8 Max. Discharge Current 1.0C
9 Discharge Cut-off Voltage ≤19.6V
10 Operating Temperature

Discharge: -40℃~ +55℃

Charge: -40℃~ +45℃

Cells must be stored at 25.2V ~ 27.3V. Over long storage periods cells should be cycled every 90 days. The method is to do a charge-

discharge cycle with standard method, then charge to 25.2V~ 27.3V.
11 long term storage temperature -5 ℃~+35℃

Relative humidity: 45~75%RH

Voltage: 3.8±0.1V (single cell)

low Temperature lithium polymer batteries can work at -40℃, here we give you lithium polymer battery pack ATB6560158 29.4V 40Ah as an example (other sizes at your request) :

A, Introduction:

Together with technology's imporvement and actual demanding of low temperature batteries, there are many field in great demand of low temperature rechargebale ones.

Currently, almost all of batteries of China battery line can stand low temperature rate at minus 30 degrees.

While ATB's low tem battery can stand at most minus 40 degrees.

B, For instance, ATB6560158 battery packs, our's low tem version have following charcteristics as well.

Scope:


This document is made according to customer parameter requirements, it describes the Product Specification of Chargeable Lithium Polymer Battery produced by AIRTAKERBATTERY.

The temporary specification is only for the customer's reference, not regared as the basis of the IQC and mutual confession

C, Specification

No. Item Spec Note
1 model 6560158/40Ah 8P7S
2 Charge Voltage 29.4V (single cell 4.2V)
3 Nominal Voltage 25.9V The average value of voltage during the discharge period (with standard charge and discharge) . When shipping, the voltage without load is between 25.2V and 26.95V.
4 Nominal Capacity 8P: 40Ah Min: 38Ah Nominal Capacity refer to the capacity of 0.2C discharge to 19.25V cut-off voltage, after charging with standard method.
5 Cycle Life ≥300 Times

One cycle refer to one charge period and then one discharge period.

Test condition:

Charge: 0.2C to 29.4V

Discharge: 0.2C to 19.25V

The cycle life is the cycle times when the discharge capacity is about 75% of the rated capacity.
6 Impedance

Cell Impedance:

≤30mΩ; Assemblage Impedance: ≤80mΩ
After Standard charging, measure the internal resistance with AC1KHz (while measuring, clip near 2/3 place of the anode and the cathode.) ;Measure two sides of the drawing line after assembling. (Red B+, Black B-)
7 Max. Charge Current 0.5C
8 Max. Discharge Current 1.0C
9 Discharge Cut-off Voltage ≤19.6V
10 Operating Temperature

Discharge: -40℃~ +55℃

Charge: -40℃~ +45℃

Cells must be stored at 25.2V ~ 27.3V. Over long storage periods cells should be cycled every 90 days. The method is to do a charge-

discharge cycle with standard method, then charge to 25.2V~ 27.3V.
11 long term storage temperature -5 ℃~+35℃

Relative humidity: 45~75%RH

Voltage: 3.8±0.1V (single cell)

Lithium Polymer Battery Work-Flow

1. Mixing
• Mix solvent and bond separately with positive and negative active materials. Make into positive and negative pasty materials after stirring at high speed till uniformity.

2. Coating


• Coat metal foils uniformly with the made-up pasty materials on two sides. Then make sheets dry.

3. Pressing

• Press the above positive and negative sheets till they become flat.

4. Cutting


• Cut a roll of positive and negative sheet into smaller sheets according to battery specification and punching requests.

5. Pole pieces


• Cut the pole pieces, solder poles, and plate adhesive tape automatically according to technical parameters.

6. Winding


• Separate the positive and negative plate with separator, wind into battery cells along central spindle, and then plate terminate tape.

7. Insulation Test 1

• After separate anode and cathode by separator paper; a battery cell has formed, then test its insulation.

8. Sealing 1


• Seal the upside after putting the naked cell into soft aluminum foil .


9. Sealing 2


• Seal the left side.

10. Insulation Test 2

• Test insulation of the terminal of the battery and the aluminum foil.

11. Insulation Test 3


• Test battery cell's insulation again after sealing.

12. Vacuum Drying


• Dry battery by vacuum, eliminate humid air gas completely, to make sure battery's quality.

13. Electrolyte filling


• Fill with electrolyte in a dry glove box, relative humidity must be under 1%.


14. Sealing 3


• Seal the filling opening in the glove box.


15. Detection
• Test battery's internal resistance and the amount of electrolyte, see if it meets design requirements.

16. Activiting

• Charge and discharge the battery for the first time or more times, connect it to computer, monitor and record its performance indicators.

17. Air exhausting

• Air will exit inside battery after charging, draw it away until vacuum.

18. Sealing 4


• Seal the right side, to insure good sealing performance.


19. Folding


• Cut the redundant soft aluminum foil and fold it automatically with an automatic folding machine.


20. Capacity testing

• Sort batteries according to their capacity with high-precision sorting equipments, which is watched and recorded their performances by computers at all times.

21. Aging testing

• Store batteries in batches in warehouse after inspecting their internal resistance, voltage, capacity and size in the conditions of 10~45℃ and relative humidity of 65±20%. 30 days is needed. Batteries will be re-inspected regularly every 8 days.

22. Assembly


• Assemble according to customers requests after aging. (The assembly ways can be different to meet the customer's requests) . The operator must inspect every batch battery's voltage, internal resistance and all aspect of performance before assembly.

23. Final inspection


• Inspect performance indexes of finished batteries according to GB/ T18287-2000, strictly in accordance with GB/ T2828.1 to make outgoing quality control, every singlebattery must pass sampling inspection before leaving factory.

24. Packaging

• Packaging consists of inner plastic tray and outer double corrugated carton, make them a whole pallet, strap them, wrap with stretch film to insure transportation safety, the packaging comply the regulation of packing storage graphic symbol GB191-1990.