Battery module with heating function and battery box

A battery module and functional technology, which is applied to battery pack components, secondary batteries, circuits, etc., can solve the problems of easy falling off of the heating film and reduce the service life of the battery module, and achieve the effect of improving the fixing effect

Pending Publication Date: 2022-02-22
郑州宇通集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a battery module with a heating function to solve the problem of bonding the heating film on the module to fix the heating film in the existing battery module, so that the heating film is easy to fall off, thereby reducing the service life of the battery module. question

Method used

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  • Battery module with heating function and battery box
  • Battery module with heating function and battery box
  • Battery module with heating function and battery box

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Experimental program
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Effect test

Embodiment 2

[0083] Specific embodiment 2 of the battery module with heating function in the present invention: the difference from the above specific embodiment is that in this embodiment, the heating film is provided with an unloading seam that replaces the unloading hole in specific embodiment 1, such as Figure 7 As shown, an unloading seam 32 is processed on the heating film 30 by mechanical punching, and the unloading seam 32 extends along a direction perpendicular to the cell stack. When stretching with variable expansion force, the opening at the unloading slot 32 is enlarged, so that the heating film 30 has a greater degree of deformation. At the same time, two ends of the unloading seam 32 are punched with circular holes, and the edges of the circular holes transition smoothly, which can prevent the heating film from being torn here. It should be noted that the only shape of the unloading seam in this embodiment is different from that of the unloading hole in Embodiment 1, and th...

specific Embodiment 3

[0084] Specific embodiment 3 of the battery module with heating function in the present invention: The structure of the battery module in this embodiment is different from the above specific embodiments only in that: in this embodiment, the movable terminal is connected to the end plate Long holes extending back and forth are also provided.

specific Embodiment 4

[0085] Specific embodiment 4 of the battery module with heating function in the present invention: The structure of the battery module in this embodiment is different from the above-mentioned specific embodiments only in that the connecting piece is a fixing bolt, and the fixing bolt is screwed on the end On the board, the movement of the end of the heating film against the cell is restricted by the bolt head of the fixing bolt. In other embodiments, the connecting piece may also be fixed on a pin on the end plate, and a blocking cap is provided at one end of the pin to limit separation from the pin.

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Abstract

The invention relates to a battery module with a heating function and a battery box. The battery module with the heating function comprises a battery cell, an end plate and a heating film, and the heating film and the battery cell are bonded and fixed. The two ends of the heating film of the battery module are connected with the end plate through a connecting piece, a stop structure on the connecting piece can prevent the end part of the heating film from warping, and the fixing effect of the heating film is improved. Compared with an existing mode that a heating film is fixed only through glue, after the battery module expands, stress on the end portion of the heating film in the battery cell stacking direction is unbalanced, and the end portion of the heating film is prone to warping, the stopping structure can be matched with the end portion of the heating film in a stopping mode, so that the end portion of the heating film is not prone to warping, and the battery module is not prone to deformation. The technical problem that the service life of the battery module is shortened due to the fact that the heating film is easy to fall off when the heating film is bonded on the module to realize fixation in the existing battery module is solved.

Description

technical field [0001] The invention relates to a battery module and a battery box with a heating function. Background technique [0002] The existing battery box will be affected by the ambient temperature during use, and the battery discharge capacity is poor at low temperature. In addition, at low temperatures, the conductivity of charged ions inside the battery is poor, and the transfer and insertion capabilities of charges in the negative electrode material structure are also poor. When charging at low temperatures, a large number of lithium ions accumulate on the surface of the negative electrode and cannot be embedded. The deposition of electrons on the surface of the electrode will cause the accumulation of simple lithium, and lithium metal is very prone to uneven crystal growth. When the dendrite grows to a sufficient scale, it may pierce the separator, resulting in a direct connection between the positive and negative electrodes and in the cell. An internal short ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/6571H01M50/204H01M50/242H01M50/244H01M50/258H01M50/264
CPCH01M10/615H01M10/6571Y02E60/10
Inventor 李俊刘汉祥吴云川侯守林曹海月付卫东
Owner 郑州宇通集团有限公司
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