CN-122026009-A - Pole extension piece and single battery assembly

CN122026009ACN 122026009 ACN122026009 ACN 122026009ACN-122026009-A

Abstract

The invention belongs to the field of batteries, and particularly relates to a pole extension piece and a single battery assembly. The problem that the connection difficulty and the function structure that traditional low-height pole exists set up limited is solved, set up mounting hole and two first logical grooves on the pole extension spare body, two first logical grooves are used for fixed heat transfer pipe, and pole extension spare body part position is arranged in the heat transfer pipe inner chamber. The single battery assembly comprises a single battery and a pole extension piece, wherein a pole is inserted into the mounting hole and fixedly connected with the pole extension piece, and the bottom surface of the pole extension piece is kept at an electric conduction safety distance from the upper cover plate of the single battery. The pole and the pole extension piece are firmly combined into a whole to form a novel connecting component with obviously increased height, so that a plurality of difficulties in connection of the traditional low-height pole are effectively solved. After the heat transfer pipe is arranged on the two first through grooves, the part of the body of the pole extension piece is in direct contact with the heat transfer medium flowing in the inner cavity of the heat transfer pipe, so that the heat exchange of the pole extension piece is realized.

Inventors

CHEN MENGQI
LI ERQIANG

Assignees

双澳储能科技（西安）有限公司

Dates

Publication Date: 20260512
Application Date: 20250430

Claims (10)

1. The pole extension piece is characterized by comprising a pole extension piece body, wherein the pole extension piece body is provided with a mounting hole extending along a third direction, the mounting hole is used for inserting part of the structure of a pole to realize the connection of the pole extension piece body and the pole, and the top end of the pole extension piece body is higher than the top end of the pole; The pole extension piece body is provided with two first through grooves which are distributed along a second direction, and each first through groove penetrates through the pole extension piece body along the first direction; defining a pole extension piece body part positioned between two first through grooves as a first pole extension piece body part; The two first through grooves are used for fixing the heat transfer tube, and the first part of the pole extension piece body is arranged in the inner cavity of the heat transfer tube, wherein the first direction, the second direction and the third direction are mutually perpendicular.
2. The pole extension piece according to claim 1, wherein the mounting hole is a stepped through hole, the inner diameter of the large-aperture section is larger than the outer diameter of the pole to form a welding cavity, the inner diameter of the small-aperture section is matched with the outer diameter of the pole for inserting part of the structure of the pole, and the bottom of the large-aperture section is level with the end face of the top end of the pole; and the hole bottom of the large-aperture section is used as a welding surface and is used for being welded with the end face of the top end of the pole.
3. The pole extension piece according to claim 1 or 2, characterized in that the first part of the pole extension piece body is provided with a functional structure for increasing the heat exchange area.
4. The pole extension piece according to claim 3, wherein the functional structure is at least one through hole formed in the first portion of the pole extension piece body, the through hole penetrating the first portion of the pole extension piece body in the first direction for the heat transfer medium to pass through.
5. The pole extension piece according to claim 4, wherein the mounting hole extends through the pole extension piece body first portion in a third direction and through the through hole.
6. The pole extension piece according to claim 1, wherein a welding portion is provided on a side wall of the first through groove, which is far away from the first portion of the pole extension piece body, and the welding portion is used for welding and fixing with the heat transfer tube.
7. The pole extension piece according to claim 1, further comprising an electrical connection post, wherein the electrical connection post is positioned at the bottom of the pole extension piece body and protrudes from the pole extension piece body; The mounting hole penetrates through the electric connecting column.
8. A single battery assembly is characterized by comprising a single battery and the pole extension piece according to any one of claims 1 to 7, wherein a single battery pole is inserted into a mounting hole of the pole extension piece and fixedly connected with the pole extension piece, and an electric conduction safety distance is kept between the bottom surface of the pole extension piece and an upper cover plate of the single battery.
9. The battery cell assembly of claim 8, wherein the battery cell post is provided with an annular step structure along the circumferential direction, the small-diameter end of the post is inserted into the mounting hole of the post extension piece, the step surface is used as a limiting surface for supporting the post extension piece, and the electrical conduction safety distance between the bottom surface of the post extension piece and the upper cover plate of the battery cell is ensured.
10. The battery cell assembly of claim 8, wherein a conductive coating is disposed between the outer wall of the pole and the pole extension mounting hole.

Description

Pole extension piece and single battery assembly Technical Field The invention belongs to the field of batteries, and particularly relates to a pole extension piece and a single battery assembly. Background In the field of batteries, as a key component for connecting the battery with an external circuit, the performance and structural design of the battery have a critical influence on the overall performance and safety of the battery. In practical applications, the height of the conventional battery pole is generally low, and the inherent defect structure causes a plurality of inconveniences to the connection and fixing links of the battery assembly. For example, when a battery module is built, too low a pole is difficult to realize firm and efficient connection with other components, so that stability and reliability of the whole battery system are greatly reduced, connection looseness is easy to occur under long-term use or complex working conditions, electric energy transmission efficiency is affected, and faults such as disconnection and the like are even caused. In addition, the limit of the height of the pole column also makes it difficult to arrange additional functional structures on the pole column, for example, due to space limitation, it is difficult to directly install a heat transfer tube on the pole column to realize effective heat dissipation, thereby affecting the thermal management effect of the battery in the charge and discharge process, possibly causing overheat of the battery, reducing the service life of the battery and even bringing potential safety hazards. Disclosure of Invention In order to solve the problems of connection difficulty and limited functional structure setting of the traditional low-height pole, the invention provides a pole extension piece and a single battery assembly. The invention provides a pole extension piece, which comprises a pole extension piece body, wherein the pole extension piece body is provided with a mounting hole extending along a third direction, the mounting hole is used for inserting part of a pole structure to realize the connection of the pole extension piece body and a pole, and the top end of the pole extension piece body is higher than the top end of the pole; The pole extension piece body is provided with two first through grooves, the two first through grooves are distributed along the second direction, and each first through groove penetrates through the pole extension piece body along the first direction; defining a pole extension piece body part positioned between two first through grooves as a first pole extension piece body part; The two first through grooves are used for fixing the heat transfer tube, and the first part of the pole extension piece body is arranged in the inner cavity of the heat transfer tube, wherein the first direction, the second direction and the third direction are mutually perpendicular. According to the invention, the mounting hole is formed in the pole extension piece body, so that in actual assembly, the preliminary positioning can be quickly completed only by inserting the pole into the mounting hole, and complex mounting technology and special tools are not required, thereby remarkably improving the production efficiency and laying a solid foundation for large-scale production. After the pole is inserted, reliable fixing modes such as interference fit, welding, threaded connection and the like can be selected according to actual requirements, the pole and the pole extension piece are firmly combined into a whole, a novel connecting part with obviously increased height is formed, and a plurality of difficulties in connection of the traditional low-height pole are effectively solved. Meanwhile, two first through grooves are formed in the pole extension piece and are used for installing the heat transfer tube. After the heat transfer pipe is arranged on the two first through grooves, the first part of the pole extension piece body is arranged in the inner cavity of the heat transfer pipe and is in direct contact with the heat transfer medium flowing in the inner cavity of the heat transfer pipe, the heat transfer medium directly acts on the pole extension piece, the heat exchange of the pole extension piece is realized, a shorter heat exchange path is provided, the utilization efficiency of the heat transfer medium is improved, and the heat exchange efficiency of the battery is improved. The inner diameter of the small-aperture section is matched with the outer diameter of the pole and is used for inserting part of the structure of the pole, and the bottom of the hole of the large-aperture section is level with the end face of the top end of the pole; The bottom of the large-aperture section is used as a welding surface for welding with the end face of the top end of the pole. A number of significant advantages are exhibited in face welding. From the viewpoint of implementation of the welding process, the weld