CN-122026019-A - Pole extension piece, single battery assembly and single battery pole

CN122026019ACN 122026019 ACN122026019 ACN 122026019ACN-122026019-A

Abstract

The invention belongs to the field of batteries, and particularly relates to a pole extension piece, a single battery assembly and a single battery pole. The problem of difficult connection that traditional low-height post exists is overcome. The battery pole comprises a pole body, an annular step structure is arranged along the circumference of the pole body, a small-diameter section of the pole is used for being inserted into the mounting hole of the pole extension, and a step surface is used as a limiting surface for supporting the pole extension. The invention firmly combines the pole and the pole extension piece into a whole to form a novel connecting component with obviously increased height, and effectively solves a plurality of problems faced by the traditional low-height pole in connection.

Inventors

LEI ZHENGJUN
CHEN MENGQI

Assignees

双澳储能科技（西安）有限公司

Dates

Publication Date: 20260512
Application Date: 20250430

Claims (12)

1. The pole extension piece is characterized by comprising a pole extension piece body, wherein a mounting hole is formed in the pole extension piece body and is used for inserting part of a pole structure, the pole extension piece body is connected with a pole, and the top end of the pole extension piece body is higher than the top end of the pole.
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, wherein the pole extension piece body is provided with a heat transfer tube mounting structure for mounting a heat transfer tube to realize heat exchange of the pole extension piece.
4. The pole extension piece according to claim 3, wherein the heat transfer tube mounting structure is a through groove formed in the pole extension piece body, an inner cavity of the through groove is used for mounting the heat transfer tube, a length direction axis of the through groove is perpendicular to an axis of the mounting hole, and the mounting hole vertically penetrates through a groove bottom of the through groove.
5. The pole extension piece according to claim 4, wherein the side wall of the through groove is provided with a welding part for welding and fixing with the heat transfer tube.
6. The pole extension piece according to claim 4, 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; The bottom of the large-aperture section is used as a welding surface for being welded with the end face of the top end of the pole, and the depth of the large-aperture section is greater than or equal to the height of the welding seam.
7. The pole extension piece according to claim 4, wherein the mounting hole is a through hole for inserting part of the pole structure, the hole opening of the through hole is flush with the top end face of the pole, and the annular plane around the mounting hole on the bottom of the through groove is used as a welding surface for welding connection with the top end face of the pole.
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, the top end of a pole extension piece body is higher than the top end of the pole, 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 section 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.
11. The single battery pole is characterized by comprising a pole body, wherein an annular step structure is arranged along the circumferential direction of the pole body, a small-diameter section of the pole is used for being inserted into a mounting hole of a pole extension piece, and a step surface is used as a limiting surface for supporting the pole extension piece.
12. The single battery pole according to claim 11, wherein the height of the small-diameter section is 2mm, the outer circumference of the small-diameter section is C, the effective welding height of the small-diameter section and the pole extension piece is h, and h is equal to 1.5mm; And the annular welding surface area S=C×h of the small-diameter section and the pole extension piece, wherein the S is required to meet the condition that the welding area is not overheated or fused under rated working current.

Description

Pole extension piece, single battery assembly and single battery pole Technical Field The invention belongs to the field of batteries, and particularly relates to a pole extension piece, a single battery assembly and a single battery pole. 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. Disclosure of Invention The invention aims to provide a pole extension piece, a single battery assembly and a single battery pole, which overcome the problems of difficult connection and the like of the traditional low-height pole. The first aspect of 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, the mounting hole is used for inserting part of a pole structure, the pole extension piece body is connected with a pole, and the top end of the pole extension piece body is higher than the top end of the pole. 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. 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 welding cavity is spacious and regular, so that the welding equipment can be conveniently penetrated in depth, and the operability is higher. From the connection stability promotion aspect, through the terminal surface welding that the ladder through-hole realized, can form the continuous welding seam of large tracts of land, greatly strengthened the axial joint strength between utmost point post and the extension. In the daily work of the battery, the high-strength connection mode can ensure stable and reliable connection between the pole and the pole extension piece in the face of complex working conditions such as vibration, impact and the like, and can forcefully support the battery to realize long-term reliable operation. Further, the pole extension piece body is provided with a heat transfer tube mounting structure for mounting a heat transfer tube, so that heat exchange of the pole extension piece is realized. Because the traditional low-height pole is limited by space, the heat transfer pipe mounting structure is difficult to set on the pole, so that heat generated in the battery charging and discharging process cannot be timely emitted, and the battery performance and the service life are seriously affected. The pole extension piece effectively increases the height of the pole, so that the direct installation of the heat transfer tube on the pole extension piece is possible. The improvement can obviously improve the thermal management efficiency of the battery, timely conduct heat generated by the battery away, effectively avoid overheat phenomenon of the battery, greatly slow down the aging speed of the battery, prolong the service life of the battery, greatly reduce the risk of thermal runaway, ensure the safety of equipment and personnel, and provide powerful guarantee for the stable operation of the battery under various complex working conditions. The heat