Soft-packed battery module and assembling method thereof

A technology of soft-pack batteries and modules, which is applied to battery pack parts, batteries, secondary batteries, etc., can solve the problems of inability to install modules and pre-tighten, avoid inconvenient installation and ensure reliability Effect

Active Publication Date: 2020-06-26
SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it only uses the exploded diagram to reveal the positional relationship of each plate of the module, and does not involve the con...

Method used

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  • Soft-packed battery module and assembling method thereof
  • Soft-packed battery module and assembling method thereof
  • Soft-packed battery module and assembling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] This embodiment provides a soft pack battery module, specifically a detachable module, the explosion diagram of which is shown in figure 1 As shown, the soft-pack battery module includes a cell group 7, left and right side plates, upper and lower cover plates, and front and rear side plates arranged outside the cell group 7;

[0076] The left and right side plates include a left side plate 11 and a right side plate 5 arranged oppositely, the upper and lower cover plates include an upper cover plate 1 and a lower cover plate 8 arranged oppositely, and the front and rear side plates include: a front end cover arranged oppositely Assembling board 10 (structural schematic diagram sees Figure 5 ) and rear end cover assembly plate 3, and the front cover plate assembly plate 9 of opposite arrangement (structural schematic diagram sees Figure 4 ) and a rear cover assembly plate 4, and the front cover assembly plate 9 and the rear cover assembly plate 4 are respectively locat...

Embodiment 2

[0087] This embodiment provides a method for assembling the pouch battery module described in Embodiment 1, including the following steps:

[0088] (1) Module design

[0089] This embodiment uses the VDA355 module, the module size is: 355×151×108.5mm, the battery size is: 310×102×11mm; the thickness of all batteries: 11×12=132mm, other parts (heat shield and Glue) sum of thickness: 9mm.

[0090] (a) Use the battery cell detection device to test the cell preload F and cell expansion space The best pre-tightening force F of the measured cell is 30KPa and the expansion space of the cell is 5%.

[0091] (b) According to the pressure-strain curve curve of the selected foam material (this embodiment selects PU) as Figure 6 As shown (the ordinate is the stress, and the abscissa is the strain), it is determined that when the pressure of the foam is 30KPa, the pre-tightening compression x% of the foam is 15%, and with the use of the battery, the cell will gradually expand to T...

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Abstract

The invention discloses a soft-packed battery module and an assembling method thereof. The soft-packed battery module comprises a battery cell group, and left and right side plates, upper and lower cover plates and front and rear end covers which are arranged on the outer side of the battery cell group. The left and right side plates and the upper and lower cover plates or the left and right sideplates and the front and rear side plates are adjustably and detachably connected in a matched manner to tightly press the internal battery cell group, so that the left and right side plates are continuously restrained by the upper and lower cover plates or the left and right side plates to generate pressure for clamping battery cells so as to tightly press the battery cells, and the pressure is 5-300kPa. The left and right side plates, the upper and lower cover plates and the front and rear end covers are detachably connected to package the battery cells to form the soft-packed battery module. The battery cell group comprises foam, the left and right side plates are parallel to or consistent with the plane of the battery cells in direction, and the front and rear side plates are verticalto the left and right side plates and the horizontal plane. According to the battery module, the overall reliability is greatly improved, and the assembly efficiency of the battery module is high.

Description

technical field [0001] The invention relates to the technical field of batteries, relates to a soft pack battery module and an assembly method thereof, in particular to a soft pack battery module which is convenient for pretensioning and assembling. Background technique [0002] Lithium-ion power battery is the core component of today's new energy vehicles, and its performance directly determines the key to the development of new energy vehicles. When a lithium-ion battery is charged, lithium ions are released from the positive electrode and inserted into the graphite of the negative electrode, and the negative electrode expands; during discharge, lithium ions are released from the negative electrode and embedded in the layered positive electrode material, and the expansion of the negative electrode is relieved; at the same time, during the aging process of the battery, the electrolyte Gas will be produced, leading to an increase in battery thickness. This not only affects ...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/10H01M10/0525H01M10/058H01M50/147H01M50/166H01M50/20
CPCH01M10/058H01M10/0525H01M2220/20H01M50/166H01M50/147H01M50/20Y02E60/10Y02P70/50
Inventor 李峥冯玉川何泓材陈凯杨帆
Owner SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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