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A soft pack battery module and its assembly method

A soft-pack battery and module technology, applied in battery pack components, batteries, secondary batteries, etc., can solve problems such as inability to install modules and preload, avoid inconvenient installation, and ensure reliability. Effect

Active Publication Date: 2021-01-01
SUZHOU QINGTAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 connection relationship of each plate and block of the module, nor can it overcome the problem that the module cannot be installed and pre-tightened

Method used

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  • A soft pack battery module and its assembly method
  • A soft pack battery module and its assembly method
  • A soft pack battery module and its assembly method

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-pack battery module and an assembly method thereof. The soft-pack battery module includes a cell group, left and right side plates, upper and lower cover plates, and front and rear end covers arranged outside the cell group; The left and right side plates and the upper and lower cover plates or the left and right side plates and the front and rear side plates are connected through an adjustable and detachable joint to tighten the internal battery pack, so that the left and right side plates are continuously constrained by the upper and lower cover plates or the left and right side plates. Generate a pressure to clamp the battery cell to tighten the battery cell. The pressure is 5-300kPa; the left and right side plates, upper and lower cover plates, and front and rear end covers can be detachably connected to package the battery cell to form a pouch battery module; The cell pack includes foam, the left and right side plates are parallel to or in the same direction as the plane of the battery sheet, and the front and rear side plates are perpendicular to the left and right side plates and the horizontal plane. The battery module involved in the present invention not only greatly improves the overall reliability, but also has high assembly efficiency of the battery module.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/202H01M50/249H01M50/271H01M10/0525H01M10/058H01M50/147H01M50/166H01M50/20
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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