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Functional filling material for li-ion battery pack

A technology for lithium-ion battery packs and filling materials, which is applied to battery pack components, circuits, electrical components, etc., can solve problems such as battery overcharge, serious heat generation, and battery soft drum, so as to improve safety and life, and reduce combustion. effect, the effect of ensuring safe use

Inactive Publication Date: 2012-08-01
惠州市博能新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, when the temperature is uneven, some battery pole pieces under high temperature conditions are also easily damaged, which can easily lead to battery overcharging, seriously affecting the performance of the battery (pack) and its service life, showing that the amount of electricity that can be charged is getting less and less , the heat generation is also more serious. When the heat cannot be effectively transmitted or dissipated, it will easily lead to the decrease of the electrochemical performance of the battery pack and the occurrence of a single battery lagging behind. ACCIDENT

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A filler material for a lithium-ion battery pack, which is formed by mixing the following components:

[0021] Paraffin wax 50%, tetrabromobisphenol A 25%, triphenyl phosphate 25%.

[0022] The preparation method and the use method are: mixing and casting the above three components in proportion to form the required model, and placing it in the gap of the battery pack.

[0023] After testing, the limiting oxygen index of the material described in this embodiment is 31, achieving the non-combustible effect.

[0024] The limiting oxygen index refers to the volume fraction concentration of oxygen in a mixed gas of oxygen and nitrogen when the polymer is just able to support its combustion. is an index that characterizes the combustion behavior of materials. A high oxygen index indicates that the material is not easy to burn, and a low oxygen index indicates that the material is easy to burn. It is generally believed that the oxygen index 27 is a non-combustible material....

Embodiment 2

[0027] A filler material for a lithium-ion battery pack, which is formed by mixing the following components:

[0028] Paraffin 70%, Tetrabromobisphenol A 10%, Triphenyl Phosphate 10%, Fine Particle Zinc Borate 5%, Fine Particle Magnesium Oxide 5%. The reason for choosing fine particle zinc borate is that fine particles can enhance the flame retardant effect and reduce the amount of this material.

[0029] After testing, the limiting oxygen index of the material described in this embodiment is 28, achieving the non-combustible effect.

Embodiment 3

[0031] A filler material for a lithium-ion battery pack, which is formed by mixing the following components:

[0032] Solid paraffin 40%, hexabromocyclododecane 25%, melamine polyphosphate 25%, fine particle barium borax 10%.

[0033] After testing, the limiting oxygen index of the material described in this embodiment is 33, achieving the non-combustible effect.

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Abstract

The invention relates to functional materials for filling gaps among batteries of a battery pack and among battery packs, particularly to a solid material with the flame-retardant effect, the high heat capacity and the high softening temperature. A filling material for a li-ion battery pack comprises solid paraffin and a solid fire retardant, wherein the consumption ratio between the solid paraffin and the solid fire retardant is, by mass, (40 - 80) : (20 - 60). The solid fire retardant is selected from at least one of haloid, phosphate or phosphate salts, borate and magnesium oxide or aluminum oxide. The functional filling material is the solid material which is used for filling inside the battery pack and has the flame-retardant effect, the high heat capacity and the high softening temperature, during usage, heat generated by the battery pack is absorbed by the filling material, ambient temperatures of batteries are lowered and homogenized during usage of the battery pack, and the flame retardant material can greatly reduce combustion effect under the extreme conditions, so that safe usage of the li-ion battery pack is guaranteed.

Description

[0001] technical field [0002] The invention relates to a functional material filled in the gaps of battery packs, in particular to a solid material with high heat capacity and high softening temperature with flame-retardant effect. Background technique [0003] Power lithium batteries (power lithium-ion batteries or lithium-ion battery packs) are the most critical components of electric vehicles, which can be called the heart of electric vehicles and are the focus of electric vehicle research. [0004] The high power and fast charging and discharging of power lithium batteries are the general trend of the development of electric vehicles. For a battery pack, the higher the charge-discharge rate, the faster its temperature rises, and the temperature has a double impact on the battery: the higher the temperature, the smaller the internal resistance of the battery, and the higher the corresponding battery efficiency; at the same time, High temperature accelerates various ch...

Claims

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Application Information

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IPC IPC(8): H01M2/10
CPCY02E60/12Y02E60/10
Inventor 张承平郭也平文哲泽卢伟凤郝华
Owner 惠州市博能新能源有限公司
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