CN-224232885-U - Heat dissipation composite tab structure of lithium cobaltate battery

Abstract

The utility model relates to the technical field of batteries, in particular to a heat dissipation composite tab structure of a lithium cobaltate battery, which is arranged on a battery cell group, wherein a plurality of battery cells are arranged in the battery cell group, each battery cell is provided with two electrode posts, each battery cell comprises an insulating support, a heat conduction piece and a liquid cooling heat dissipation piece, the insulating supports are arranged on the battery cell group, two conductive electrode pieces are arranged on the insulating supports, each conductive electrode piece is provided with a plurality of connection tabs, all the connection tabs on each conductive electrode piece are respectively and electrically connected with the electrode posts corresponding to the electric connection attribute on the battery cell one by one, the heat conduction piece is attached to the conductive electrode pieces and all the connection tabs, the liquid cooling heat dissipation piece is attached to one side, far away from the insulating supports, of the heat conduction piece, the two sides of the liquid cooling heat dissipation piece are provided with heat conduction fins, and the heat conduction fins are completely covered on the heat conduction piece, and the edges of the heat conduction fins are clamped with the insulating supports. The heat dissipation composite tab structure of the lithium cobalt oxide battery is compact in overall structure and good in heat dissipation effect.

Inventors

• HE MINHUA
• HUANG HAO

Assignees

• 合山市华美新能源科技有限公司

Dates

Publication Date

20260512

Application Date

20250723

Claims (10)

1. 1. The utility model provides a lithium cobaltate battery's compound utmost point ear structure of heat dissipation, installs on the electricity core group, be provided with a plurality of electric cores in the electricity core group, the electricity core has two utmost point posts, its characterized in that, including insulating support, heat conduction spare and liquid cooling radiating member, the insulating support sets up on the electricity core group, be provided with two conductive pole pieces on the insulating support, every all be provided with a plurality of connection utmost point ears on the conductive pole piece, every all on the conductive pole piece the connection utmost point ear respectively with all the corresponding utmost point post one-to-one electricity of electric connection attribute on the electricity core is connected, the laminating of heat conduction spare is in on conductive pole piece and all on the connection utmost point ear, the laminating of liquid cooling radiating member is in on the heat conduction spare is kept away from on the one side of insulating support, the both sides of liquid cooling radiating member are provided with the heat conduction fin, the heat conduction fin covers completely on the heat conduction spare and the edge with insulating support joint.
2. 2. The heat dissipation composite tab structure of a lithium cobaltate battery according to claim 1, wherein the liquid cooling heat dissipation member is a flat flexible pipe body and one end is closed, a partition plate is arranged in the liquid cooling heat dissipation member, the liquid cooling heat dissipation member is internally divided into a liquid outlet channel and a liquid inlet channel by the partition plate, the liquid inlet channel is positioned below the liquid outlet channel, the liquid outlet channel and the liquid inlet channel are communicated with one closed end of the liquid cooling heat dissipation member, the side surface of the corresponding side of the heat conduction member is attached to the outer wall of the area where the liquid cooling heat dissipation member is positioned, and two heat conduction fins are respectively arranged on two sides of the liquid cooling heat dissipation member positioned on the liquid inlet channel.
3. 3. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 2, wherein a plurality of deflectors are arranged in the liquid inlet channel.
4. 4. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 2, wherein the side wall of the liquid cooling heat dissipation member located at one side of the liquid inlet channel is recessed inwards to form a containing area, and the partial area of the heat conduction member is arranged in the containing area and is in heat conduction contact with the outer wall of the containing area respectively.
5. 5. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 1, wherein the conductive tabs are fastened and fixed on the insulating support, an elastic connection area is provided between each connection tab and the corresponding conductive tab, and the connection tab is bent and protruded to one side of the heat conduction member.
6. 6. The heat dissipation composite tab structure of a lithium cobaltate battery according to claim 1 or 5, wherein the connection tab is provided with a connection hole, the connection hole is adapted to a tab corresponding to the battery cell, and an inner wall of the connection hole is connected with an outer wall of the tab by welding.
7. 7. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 1, wherein the insulating support is provided with a containing groove for containing a conductive pole piece, the containing groove is provided with at least one positioning column, the conductive pole piece is provided with a positioning hole matched with the positioning column, the opening of the containing groove is provided with a step, the edge of the heat conduction fin is clamped on the step, and the containing groove is provided with an avoidance hole for avoiding the pole on the battery cell.
8. 8. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 1, wherein an isolation region is provided between the two conductive electrode plates by the insulating support.
9. 9. The heat dissipation composite tab structure of a lithium cobaltate battery of claim 1 further comprising an insulating cover, wherein the insulating cover is fixed on the insulating bracket by a screw, and the insulating cover compresses the liquid cooling heat dissipation member on the heat conduction member.
10. 10. The heat dissipation composite tab structure of a lithium cobaltate battery as defined in claim 1, wherein the heat conductive member is a heat conductive silica gel.

Description

Heat dissipation composite tab structure of lithium cobaltate battery Technical Field The utility model relates to the technical field of batteries, in particular to a heat dissipation composite tab structure of a lithium cobalt oxide battery. Background Lithium cobaltate batteries have high specific capacity and outstanding comprehensive performance, but have poor thermal stability and very high cost, and are mainly used in equipment with long endurance in consumer markets, such as smart phones, tablets, notebook computers, digital cameras and portable medical equipment. The lithium cobaltate battery generally consists of a plurality of electric cores which are connected in parallel or in series, the lug of each electric core is connected on one conductor in a welding mode to form a total lug, and each lithium cobaltate battery is provided with two total lugs which are actually the positive and negative poles of the lithium cobaltate battery for discharging outwards. Because the lithium cobaltate battery can release heat outwards in the process of charging and discharging, and each battery cell is welded and connected between the electrode lug and the conductive piece, the texture of the region is uneven, meanwhile, the cross section area of the electrode lug is small, and when the current of the whole battery cell is conducted, the temperature of the battery cell in the electrode lug region is easily led to be obviously higher than that of the battery cell body region. Under the condition, the temperature of the lug of each cell is different, when the lithium cobaltate battery is wholly discharged outwards, the situation easily causes the current of each cell to be uneven, partial cells can be accelerated and attenuated, and finally the lithium cobaltate battery is caused to fail prematurely, so that the service life and the working efficiency of the whole lithium cobaltate battery are greatly influenced by the too high temperature of the lug of each cell. For such situations, the current mainstream practice is to set a heat dissipation structure inside a lithium cobaltate battery, the heat dissipation structure directly dissipates heat of all the battery cells, so that normal operation of each battery cell is guaranteed, for example, a patent CN 202210197372.2-direct cooling type battery pack heat management device and a heat management system based on tab heat dissipation are disclosed, in the patent, heat inside the battery cell is rapidly led out through a tab heat dissipation mode, the heat dissipation efficiency of the battery cell can be greatly improved, the temperature gradient inside the battery cell is reduced, but in the patent, the whole structure needs to be provided with a plurality of cooling pipelines, the structure is complex, the structure occupies a plurality of spaces inside the battery, the energy density in the unit volume of the battery can be reduced, and therefore, a composite tab structure with compact structure and good heat dissipation effect is needed to be designed to connect each battery cell, and the normal transportation and heat dissipation functions of electric energy inside the whole battery are guaranteed. Disclosure of utility model In order to overcome one of the defects in the prior art, the utility model aims to provide the heat dissipation composite tab structure of the lithium cobalt oxide battery, which has compact overall structure and good heat dissipation effect. In order to solve the problems, the technical scheme adopted by the utility model is as follows: The utility model provides a lithium cobaltate battery's compound utmost point ear structure of heat dissipation, installs on electric core group, be provided with a plurality of electric cores in the electric core group, the electric core has two utmost point posts, including insulating support, heat conduction spare and liquid cooling radiating member, the insulating support sets up on the electric core group, be provided with two electrically conductive pole pieces on the insulating support, every all be provided with a plurality of connection utmost point ears on the electrically conductive pole piece, every all on the electrically conductive pole piece the connection utmost point ear respectively with all the electric property's of corresponding connection utmost point post one-to-one electricity is connected on the electric core, the laminating of heat conduction spare is in electrically conductive pole piece and all on the connection utmost point ear, the laminating of liquid cooling radiating member is in on the heat conduction spare is kept away from on one side of insulating support, the both sides of liquid cooling radiating member are provided with heat conducting fin, heat conducting fin covers completely on the heat conduction spare and the edge with insulating support joint. Further, the liquid cooling heat dissipation piece is flat flexible body and one end is sealed, the inside baffle th