US-12626993-B2 - Case, battery, power consuming device, and method for assembling case

US12626993B2US 12626993 B2US12626993 B2US 12626993B2US-12626993-B2

Abstract

A case, a battery, a power consuming device, and a method for assembling a case are provided. The case includes a first case body, an accommodating groove, a sealant, and a second case body. The first case body is provided with an opening. The accommodating groove is provided in a peripheral direction of the opening. The sealant is accommodated in the accommodating groove. The second case body is provided with a peripherally-arranged joint part. The joint part is configured to extend into the accommodating groove and be joined with the sealant when the second case body covers the opening, so as to form a sealed connection between the first case body and the second case body. The accommodating groove can limit the sealant, the sealant does not shift in the accommodating groove, and a sealing failure is less likely to occur, thus ensuring the sealing performance of the sealant.

Inventors

Binbin Chen
Danyue Xue
Qing Wang
Yifeng Chen
Shuai Ren

Assignees

CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Dates

Publication Date: 20260512
Application Date: 20230227
Priority Date: 20200831

Claims (11)

1 . A case for a battery comprising: a first case body provided with an opening; an accommodating groove provided in a peripheral direction of the opening; a sealant accommodated in the accommodating groove; a holder arranged in the first case body wherein an inner peripheral wall of the first case body and the holder jointly define the accommodating groove; a first locking member via which the holder is connected to the first case body; and a second case body provided with a peripherally-arranged joint part wherein the joint part extends into the accommodating groove and is joined with the sealant, wherein the second case body covers the opening so as to form a sealed connection between the first case body and the second case body, wherein the holder comprises a stepped surface formed between a first peripheral surface and a second peripheral surface wherein the stepped surface is a bottom wall of the accommodating groove wherein the joint part is provided with a notch for avoiding the first locking member and sealant completely covers the notch.
2 . The case according to claim 1 , wherein the joint part is configured to extend into the accommodating groove and be inserted into the sealant such that the joint part is joined with the sealant.
3 . The case according to claim 1 , wherein the accommodating groove is located on an inner side of the first case body.
4 . The case according to claim 1 , wherein the holder is provided with a limiting portion and the limiting portion is configured to abut against a battery unit located in the first case body to limit a movement of the battery unit in a direction approaching the second case body.
5 . The case according to claim 1 , wherein the holder is integrally formed with the first case body or the holder is separate from the first case body.
6 . The case according to claim 1 , wherein the first case body is provided with a first mounting hole and the holder is provided with a second mounting hole and the first locking member sequentially passes through the first mounting hole, the sealant, and the second mounting hole to connect the holder to the first case body.
7 . The case according to claim 1 , wherein an outer peripheral wall of the holder comprises: the first peripheral surface attached to the inner peripheral wall of the first case body and the second peripheral surface arranged spaced apart from the inner peripheral wall of the first case body wherein the second peripheral surface is one side wall of the accommodating groove and the inner peripheral wall of the first case body is the other side wall of the accommodating groove.
8 . The case according to claim 1 , further comprising a second locking member via which the second case body is connected to the first case body.
9 . The case according to claim 8 , wherein the first case body is provided with a third mounting hole and the second case body is provided with a fourth mounting hole and the second locking member sequentially passes through the third mounting hole and the fourth mounting hole to connect the first case body to the second case body wherein the third mounting hole is closer to the opening than the sealant.
10 . A battery comprising: a case according to claim 1 ; and a battery unit accommodated in a sealed space defined by the first case body and the second case body.
11 . A power consuming device, comprising a battery according to claim 10 and the device.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application is a continuation of International Application PCT/CN2021/091336, filed Apr. 30, 2021, which claims priority to Chinese Patent Application No. CN 202010901525.8, filed on Aug. 31, 2020, entitled “CASE, BATTERY, POWER CONSUMING DEVICE, AND METHOD FOR ASSEMBLING CASE”, the contents of which are incorporated herein by reference in their entireties. TECHNICAL FIELD The present application relates to the technical field of traction batteries, and in particular, to a case, a battery, a power consuming device, and a method for assembling a case. BACKGROUND ART In order to ensure the sealing performance of a battery, it is generally necessary to seal between a first case body and a second case body of the battery. In some cases, a sealing ring is arranged between the first case body and the second case body to seal the first case body and the second case body. The sealing in this sealing mode is likely to fail. SUMMARY OF THE INVENTION Embodiments of the present application provide a case, a battery, a power consuming device, and a method for assembling a case, to solve the problem of sealing in an existing sealing mode being likely to fail. According to a first aspect, an embodiment of the present application provides a case, comprising a first case body, an accommodating groove, a sealant, and a second case body, wherein the first case body is provided with an opening; the accommodating groove is provided in a peripheral direction of the opening; the sealant is accommodated in the accommodating groove; and the second case body is provided with a peripherally-arranged joint part, wherein the joint part is configured to extend into the accommodating groove and be joined with the sealant when the second case body covers the opening, so as to form a sealed connection between the first case body and the second case body. In the case provided in the present application, since the sealant is accommodated in the accommodating groove, the accommodating groove limits the sealant, the sealant does not shift in the accommodating groove, and a sealing failure is less likely to occur, thus ensuring the sealing performance of the sealant. Since the joint part of the second case body extends into the accommodating groove and is joined with the sealant, the accommodating groove can also limit the joint part. During mounting, after the sealant is injected into the accommodating groove, the joint part of the second case body extends into the accommodating groove and is joined with the sealant, so that the first case body and the second case body are sealed, making the mounting convenient and quick. During the mounting, even if the second case body is pressed excessively, the sealant is always accommodated in the accommodating groove, and the joint part of the second case body and the sealant can always be kept in a joined state, so that the sealing failure will not be caused by the excessive pressing of the second case body. In some embodiments of the present application, the joint part is configured to extend into the accommodating groove and be inserted into the sealant, such that the joint part is joined with the sealant. In the foregoing solution, the joining of the joint part and the sealant is implemented by inserting the joint part into the sealant, so that the firmness of the joint part and the sealant after the joining is improved, a contact area between the sealant and the joint part is increased, and the sealing performance between the first case body and the second case body is improved. In some embodiments of the present application, the accommodating groove is located on an inner side of the first case body. In the foregoing solution, the accommodating groove is provided on the inner side of the first case body, so that a space inside the first case body is effectively utilized, an external space occupied by the first case body is reduced, and the energy density of the battery is increased. In some embodiments of the present application, the case further comprises a holder arranged in the first case body, wherein an inner peripheral wall of the first case body and the holder jointly define the accommodating groove. In the foregoing solution, the holder arranged inside the case and the inner peripheral wall of the first case body jointly define the accommodating groove, so that the structure is simple, and the accommodating groove can be as close to a peripheral edge of the first case body as possible. In addition, the holder arranged in the first case body can achieve a certain effect of reinforcing the first case body. In some embodiments of the present application, the holder is provided with a limiting portion; and the limiting portion is configured to abut against a battery unit located in the first case body to limit a movement of the battery unit in a direction approaching the second case body. In the foregoing solution, the limiting portion of the h