CN-122026021-A - Pole extension piece and battery component

CN122026021ACN 122026021 ACN122026021 ACN 122026021ACN-122026021-A

Abstract

The invention belongs to the field of batteries, and particularly relates to a pole extension piece and a battery component. The problem that thermal runaway is possibly caused to the too high heat of monomer battery post position department in current battery module is solved, post extension spare, including post extension spare main part, offer first logical groove on it. The battery component comprises heat transfer tubes, pole extension pieces and single batteries, wherein one pole extension piece is fixed on each pole of each single battery, the heat transfer tubes extend along a first direction and are fixed in first through grooves of the pole extension piece main bodies positioned on the same side, the heat transfer tubes are welded and fixed with two side walls of the first through grooves, inner cavities of the heat transfer tubes are used as heat transfer medium flowing cavities to realize heat exchange of the pole extension pieces, and the heat transfer tubes are electric conductors to realize parallel connection of a plurality of single batteries. After heat generated by the battery pole is conducted to the pole extension piece, the heat is further transferred to the heat transfer tube, and heat dissipation of the battery is achieved.

Inventors

CHEN MENGQI
LEI ZHENGJUN

Assignees

双澳储能科技（西安）有限公司

Dates

Publication Date: 20260512
Application Date: 20250403

Claims (10)

1. The pole extension piece is characterized by comprising a pole extension piece main body, wherein a first through groove extending along a first direction is formed in the pole extension piece main body, an inner cavity of the first through groove is used for installing a heat transfer pipe, two side walls of the first through groove are used for being welded and fixed with the heat transfer pipe, and the bottom of the first through groove is used for being connected with a single battery pole.
2. The pole extension piece according to claim 1, further comprising an electrical connection post, wherein the electrical connection post is located at the bottom of the pole extension piece body and protrudes from the pole extension piece body; the bottom of the first through groove is provided with a concave structure which is concave towards the electric connecting column, and the bottom of the concave structure is used for being connected with the single battery pole.
3. The pole extension piece according to claim 2, wherein the recessed structure is a second through groove extending along the first direction, and the pole extension piece body and the electric connection pole are integrally formed by adopting an aluminum extrusion process; or the concave structure is a blind hole concave towards the electric connecting column.
4. The pole extension piece according to claim 2, wherein the bottom of the concave structure is connected with the single battery pole by welding.
5. The pole extension piece according to any one of claims 1 to 4, wherein the pole extension piece body has a size equal to a size of the electrical connection post in a first direction, and wherein the pole extension piece body has a size larger than the size of the electrical connection post in a second direction, and wherein the first through slot has a size larger than the size of the recess structure, and wherein the second direction is a slot width direction of the first through slot.
6. A battery member characterized by comprising a heat transfer pipe, a plurality of the post extensions of any one of claims 1 to 5, and a plurality of unit batteries arranged in a first direction; A pole extension piece is fixed on the pole of each single battery; The heat transfer pipe extends along the first direction and is fixed in the first through groove of each pole extension piece main body positioned on the same side, and the outer wall of the heat transfer pipe is clung to the inner wall of the first through groove; The inner cavity of the heat transfer tube is used as a heat transfer medium flow cavity to realize heat exchange of the pole extension piece, and the heat transfer tube is an electric conductor to realize parallel connection of a plurality of single batteries.
7. The battery component according to claim 6, wherein the outer wall of the heat transfer pipe is provided with a step structure along the first direction, the horizontal plane of the step structure is flush with the end face of the side wall of the first through groove, and the seam between the horizontal plane of the step structure and the end face of the side wall of the first through groove is welded.
8. The battery member according to claim 6, wherein the inner cavity of the heat transfer tube comprises two independent sub-passages extending in the longitudinal direction of the heat transfer tube, the two independent sub-passages being equal in length to the heat transfer tube.
9. The battery component according to claim 6, further comprising a housing, wherein the plurality of unit cells are arranged in the housing, and inner cavities of the unit cells are communicated with each other; The top plate of the shell is provided with avoidance holes corresponding to the poles of all the single batteries, the electric connection poles of the pole extension piece extend into the avoidance holes to be connected with the corresponding poles, and the top plate area of the shell corresponding to the avoidance holes is welded and sealed with the upper cover plate of the single battery.
10. The battery member according to any one of claims 6 to 9, wherein a heat conductive adhesive layer is filled between the inner wall of the first through groove and the outer wall of the heat transfer tube, and between the inner wall of the concave structure and the outer wall of the heat transfer tube.

Description

Pole extension piece and battery component Technical Field The invention belongs to the field of batteries, and particularly relates to a pole extension piece and a battery component. Background At present, a common battery module (also referred to as a battery pack) is formed by connecting a plurality of unit batteries (the unit batteries are generally cylindrical batteries or prismatic batteries) together in a serial, parallel or serial-parallel combination manner. The temperature control of the battery module is always a focus of attention in the field, and most of the existing battery modules adopt an air cooling or liquid cooling mode to control the temperature of the whole battery module. However, since the battery cell post in the battery module is the most concentrated part of heat, when the local heat of the post is too high, the thermal runaway of the battery cell in the battery module is most likely to occur. Disclosure of Invention In order to solve the problem that the thermal runaway is possibly caused by the overhigh heat at the position of a single battery pole in the existing battery module, the invention provides a pole extension piece and a battery component. A first aspect of the present invention provides a pole extension comprising a pole extension body; the pole extension piece body is provided with a first through groove extending along a first direction, an inner cavity of the first through groove is used for installing a heat transfer tube, two side walls of the first through groove are used for being welded and fixed with the heat transfer tube, and the bottom of the first through groove is used for being connected with a single battery pole. The invention considers the direct heat dissipation of the pole to obtain better heat dissipation effect, in particular, the invention can be realized by fixing the heat transfer tube on the pole, but the pole of the existing battery has lower height and is difficult to be provided with a structure for fixing the heat transfer tube on the pole. Meanwhile, a first through groove is formed in the pole extension piece and used for installing the heat transfer pipe, and the bottom of the first through groove is fixed with the single battery pole. The heat generated by the battery post is first conducted to the post extension in intimate contact therewith. Because the pole extension piece is closely attached to the pole, heat can be transferred from the pole to the pole extension piece more efficiently. The first through groove formed in the pole extension piece is used for fixing the heat transfer tube, so that the heat transfer tube and the pole extension piece are enabled to have good thermal contact. When heat is conducted to the pole extension, it is further transferred to the heat transfer tube. The heat is rapidly diffused in the heat transfer tube, and the heat is dissipated through the heat exchange between the heat transfer tube and the surrounding environment, so that the heat dissipation of the battery is realized. Meanwhile, in the invention, the pole extension piece is welded with the heat transfer pipe, so that the tight combination between the pole extension piece and the heat transfer pipe can be realized, compared with other connection modes, such as simple mechanical fixation, the welding eliminates a tiny gap between connection parts, greatly reduces thermal resistance, improves heat conduction efficiency between the pole extension piece and the heat transfer pipe, ensures effective heat transfer, and the welding connection can also enhance the connection stability of the pole extension piece and the heat transfer pipe, thereby preventing the heat transfer pipe from being separated from the pole extension piece due to factors such as vibration and the like when a battery component works, and further influencing the heat dissipation effect. The pole extension piece further comprises an electric connecting pole, wherein the electric connecting pole is positioned at the bottom of the pole extension piece main body and protrudes out of the pole extension piece main body; The bottom of the first through groove is provided with a concave structure which is concave towards the electric connecting column, and the bottom of the concave structure is used for being connected with the single battery pole. Further, the concave structure is a second through groove extending along the first direction, and the pole extension piece main body and the electric connecting pole are integrally formed by adopting an aluminum extrusion process; or the concave structure is a blind hole concave towards the electric connecting column. When the concave structure is a second through groove consistent with the extending direction of the first through groove, the corresponding pole extension piece can be integrally formed by adopting an aluminum extrusion process. Compared with other concave structures, for example, a blind hole structure formed by adopting