Battery module

A technology for battery modules and battery packs, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of difficult heat dissipation, the lack of heat dissipation function of thermal conductive sheets, and the increase of components, so as to promote heat dissipation and solve the problem of thermal runaway. Effect

Active Publication Date: 2016-10-12
JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technical solution has the following defects: on the one hand, the heat conduction sheet does not have the function of heat dissipation, and there is still a problem of difficult heat dissipation during the process of thermal runaway; on the other hand, a cooling mechanism is required at the bottom, resulting in a complex structure of the module and an increase in parts , energy consumption and cost increase accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The making of composite heat dissipation layer 3: will (NH 4 ) 2 C 2 o 4 Mix it with polyvinylidene fluoride at a mass ratio of 80:20 to make a heat absorbing layer 32 slurry, then coat the heat absorbing layer 32 slurry on a copper sheet, and paint after drying to obtain a composite heat dissipation layer 3 . Wherein, the thickness of the prepared composite heat dissipation layer 3 is 15mm.

[0054] Production of battery modules: connect a plurality of single cells 1 in series and / or in parallel to form a battery pack, and set a module frame composed of two end plates 4 and two side plates 5 outside the battery pack; A thermal insulation pad 2 is provided between two adjacent single cells 1, and a composite heat dissipation layer 3 is provided between two adjacent single cells 1 and the thermal insulation pad 2, and the side edges of the copper sheet in the composite thermal radiation layer 3 are Welded on the side plate 5, the battery module of the present inventi...

Embodiment 2

[0056] The difference with embodiment 1 is:

[0057] Fabrication of the composite heat dissipation layer 3: Mix ethylene glycol crystals and polyvinylidene fluoride at a mass ratio of 70:30 to make a heat absorbing layer 32 slurry, then coat the heat absorbing layer 32 slurry on a silver sheet, and after drying Paint is then applied to obtain the composite heat dissipation layer 3 . Wherein, the thickness of the prepared composite heat dissipation layer 3 is 10mm.

[0058] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0060] The difference with embodiment 1 is:

[0061] Production of the composite heat dissipation layer 3: Mix sucrose and styrene-butadiene rubber at a mass ratio of 90:10 to make the heat-absorbing layer 32 slurry, then coat the heat-absorbing layer 32 slurry on the silver sheet, and apply polyurethane coating after drying , to obtain the composite heat dissipation layer 3 . Wherein, the thickness of the prepared composite heat dissipation layer 3 is 10mm.

[0062] The rest are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to the technical field of batteries, in particular to a battery module which comprises a battery pack formed by connecting a plurality of single cells in series and/or in parallel, a module frame arranged outside the battery pack, and thermal insulation gaskets arranged between adjacent single cells, wherein one or more composite heat dissipation layers are arranged between every two adjacent single cells and the corresponding thermal insulation gasket; each composite heat dissipation layer comprises a heat conduction piece in contact with the corresponding single cell, a heat absorption layer arranged on the heat conduction piece, and a protection layer arranged on the heat absorption layer. When extreme conditions such as overheating occur in the battery module, on one hand, heat on the stacking surfaces of the batteries is transferred to side plates for heat dissipation through the heat conduction pieces, on the other hand, the heat absorption layers on the heat conduction pieces can absorb and take away most of the heat. Therefore, the problem of thermal runaway caused by the heat accumulation of the battery module is solved effectively due to double action of the heat transferring effect of the heat conduction pieces and the heat absorption effect of the protection layers.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a battery module. Background technique [0002] With the rise of new energy vehicles, power batteries have also ushered in a period of rapid development. The safety and stability of new energy vehicles have always been the focus of attention. Therefore, improving the safety of new energy vehicles will be one of the important factors that determine whether new energy vehicles can be popularized rapidly. Battery modules are the main components of battery packs for new energy vehicles, and improving the safety of battery modules is an important way to improve the safety of new energy vehicles. [0003] A battery module is generally composed of a number of battery cells connected in series or in parallel through conductive sheets, while the module frame surrounds the battery and provides a fixing device for the module. When used as a single battery, since the battery can dissipa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/6551
CPCH01M10/613H01M10/625H01M10/6551Y02E60/10
Inventor 邹武俊张小文金海族段剑王卫涛李星
Owner JIANGSU CONTEMPORARY AMPEREX TECHNOLOGY LIMITED
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