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Battery pack lower shell and battery pack with same

A shell and battery technology, applied in the direction of batteries, battery pack components, circuits, etc., can solve the problems of poor stability, insufficient strength and rigidity, etc., and achieve the effects of stable position, small space occupation, and high structural strength

Pending Publication Date: 2021-06-25
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes a battery pack lower case, which increases the contact area between the fixing part and the lower case part, so that the formed battery pack lower case has good stability and It has high strength and torsional rigidity, which solves the problems of poor stability, insufficient strength and rigidity after the lower casing of the battery pack is formed in the prior art

Method used

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  • Battery pack lower shell and battery pack with same
  • Battery pack lower shell and battery pack with same
  • Battery pack lower shell and battery pack with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] A battery pack lower casing 100, such as image 3 and Figure 4 As shown, it includes: a lower housing part 1 , a reinforcing part 2 and a fixing part 3 .

[0113] Among them, such as image 3 As shown, the lower casing part 1 is provided with a battery cavity 11 for accommodating batteries, and the lower casing part 1 extends away from the battery cavity 11 to form a first flange 12 .

[0114] like image 3 and Figure 4 As shown, the reinforcing part 2 is connected to the side of the lower case part 1 away from the battery cavity 11, and the cavity 4 is enclosed between the reinforcing part 2 and the lower case part 1 (the specific structure of the cavity 4 can be found in Image 6 ).

[0115] combine Figure 4 and Image 6 As shown, the fixing part 3 is connected between the first flange 12 and the reinforcement part 2 , one end of the fixing part 3 extends into the cavity 4 , and the other end of the fixing part 3 is arranged outside the cavity 4 .

Embodiment 2

[0117] A battery pack lower casing 100, on the basis of Embodiment 1, such as Figure 4 As shown, at least one avoidance channel 21 is provided on the side of the reinforcing part 2 facing the first flange 12 , and each avoidance channel 21 is positioned for a fixing part 3 , and the avoiding channel 21 is connected to the fixing part 3 by spot welding.

[0118] The depth of the avoidance passage 21 is consistent with the thickness of the fixing part 3 , and one end of the escape passage 21 communicates with the cavity 4 .

Embodiment 3

[0120] A battery pack lower casing 100, on the basis of Embodiment 1, such as Image 6 As shown, the fixing portion 3 includes a first extension portion 31 , a second extension portion 32 and a third extension portion 33 in a stepped shape.

[0121] Among them, such as Image 6 As shown, the two ends of the second extension part 32 are respectively connected with the first extension part 31 and the third extension part 33, the first extension part 31 protrudes into the cavity 4 and abuts against the lower housing part 1, the second extension part The opposite side surfaces of 32 are respectively welded to the first flange 12 and the reinforcing part 2 .

[0122] like Figure 4 and Figure 5 As shown, a mounting hole 331 is formed on the third extension portion 33 for connecting with the vehicle body.

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Abstract

The invention discloses a battery pack lower shell and a battery pack with the same. The battery pack lower shell comprises a lower shell part, a reinforcing part and a fixing part. A battery cavity for containing a battery is formed in the lower shell part, the lower shell part extends in the direction away from the battery cavity to form a first turned-over edge, the reinforcing part is connected to the side, away from the battery cavity, of the lower shell part, a cavity is defined by the reinforcing part and the lower shell part, the fixing part is connected between the first turned-over edge and the reinforcing part, one end of the fixing part extends to the cavity, and the other end of the fixing part is arranged outside the cavity. According to the battery pack lower shell, the reinforcing part is arranged on one side of the lower shell part and used for improving the structural strength of the lower shell part, the fixing part is connected between the first turned-over edge and the reinforcing part, and part of the structure is located in the cavity; The lower shell part is fixedly connected to the vehicle body floor on the premise that the fixing part occupies less external space, and the structural strength and the stability of the battery pack lower shell are improved.

Description

technical field [0001] The invention belongs to the technical field of battery pack production and manufacture, in particular to a battery pack lower casing and a battery pack having the same. Background technique [0002] The battery pack mainly includes the lower casing of the battery pack, the upper casing of the battery pack, the battery, the high-voltage electrical system and the thermal management system. The battery, the high-voltage electrical system and the thermal management system are placed inside the lower casing of the battery pack, and the lower casing of the battery pack The body mainly plays the role of protecting the battery, high-voltage electrical system and thermal management system. Therefore, the lower case of the battery pack is one of the core components of the battery pack. The structural strength and stability of the lower case of the battery pack directly determine the battery pack overall performance. [0003] In the prior art, combining figure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/244H01M50/242H01M50/249H01M50/258H01M50/264H01M50/204B60K1/04
CPCB60K1/04H01M2220/20Y02E60/10
Inventor 王亚东谢堃曾祥兵张伟波
Owner 奇瑞新能源汽车股份有限公司
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