Structure convenient for heat dissipation of square-shell battery cell tabs
By filling the lithium-ion square shell battery cell ears and the box with high thermal conductivity foam and adding an evaporation and heat dissipation device on the box, the problem of insufficient heat transfer of the battery cell ears is solved, and a more efficient heat dissipation effect is achieved, and the service life of the battery cell is extended.
Patent Information
- Application Number
- CN202421155760.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-24
AI Technical Summary
During the charging and discharging process of existing lithium-ion square shell battery cells, the heat transfer of the battery cell electrodes is insufficient, resulting in an increase in the battery cell temperature and reducing the number of cycles of the battery cell.
High thermal conductivity foam is used to fill the gap between the electrode ear and the box, and a water-absorbing sponge and water pipe are installed on the outer surface of the box. Water droplets flow into the box through the sponge to prevent water droplets from entering the electrode ear of the battery, and a heat dissipation device that uses evaporation to take away the heat of the box.
By reducing the gap between the battery cell ear and the box and using high thermal conductivity materials, the heat transfer efficiency is improved, the battery cell temperature is reduced, and the number of cycles of the battery cell is extended.
Smart Images
Figure CN222637402U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of new energy electric vehicles, in particular to a structure that facilitates heat dissipation of a square shell battery core tab. Background Art
[0002] Currently, most lithium-ion square shell batteries use a thermally conductive gel or thermally conductive structural adhesive to bond the battery shell wall to the box body, so that the heat generated by the battery cell is transferred to the box body through the shell for heat dissipation.
[0003] At present, although the heat generated by the battery cell can be transferred to a part of the box through the shell, most of the heat from the battery cell tabs cannot be transferred out during the charging and discharging process. The heat transfer is limited and then remains in the battery cell, causing the battery cell temperature to increase and reducing the number of cycles in the battery cell life cycle. Utility Model Content
[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a structure that facilitates heat dissipation of the tabs of a square shell battery cell.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a structure that facilitates the heat dissipation of the square shell battery cell tabs, comprising a box body, a battery cell and a high thermal conductivity foam, the battery cell having a battery cell tab, the high thermal conductivity foam being arranged between the battery cell tab and the box body, an absorbent sponge being arranged on the outer surface of the box body, a water pipe being arranged on one side of the absorbent sponge, water droplets flow into the box body through the water pipe via the absorbent sponge, and the box body is used to prevent the water droplets from flowing into the battery cell tabs.
[0006] Furthermore, the gap between the battery cell tab and the box body is less than 2 mm.
[0007] Furthermore, the thermal conductivity of the high thermal conductivity foam is greater than 1.5W.
[0008] In summary, the beneficial effects of the utility model are:
[0009] The utility model discloses a structure that is convenient for heat dissipation of square shell battery cell pole ears, wherein the gap between the battery cell pole ears and the box body is less than 2 mm, which changes the transfer path between the battery cell pole ears and the box body, and facilitates the heat dissipation of the battery cell pole ears through the high thermal conductivity foam. In addition, the gap between the battery cell pole ears and the box body adopts foam materials with a thermal conductivity coefficient greater than 1.5W for heat transfer, and the structure of the box body adapting to the pole ears is adjusted, and the conduction efficiency is better. At the same time, a heat dissipation structure is newly added, and water droplets flow into the box body through the water pipe via the water absorbent sponge. The box body can prevent the water droplets from flowing into the battery cell pole ears, which is convenient for heat dissipation of the box body. Specifically, after the heat on the battery cell pole ears is transferred to the box body, the heat dissipation device starts to work, and the water pipe drops water on the water absorbent sponge, and the water evaporates through the water absorbent sponge to take away the heat on the box body.
[0010] The utility model discloses a structure that facilitates heat dissipation of the tabs of square-shell battery cells. First, the box corresponding to the tabs is sunk to minimize the gap between the tabs and the box, so that the heat generated at the tabs of the square-shell battery cells is transferred to the box; secondly, the gap between the tabs and the box is filled with a material with a high thermal conductivity to transfer the heat at the tabs to the box; finally, a heat dissipation device is added to the box to transfer the heat at the box to the air. The utility model discloses a square-shell battery cell structure that facilitates heat dissipation of the tabs, increases the heat transfer path of the battery cells, and reduces the temperature of the battery cells during charging and discharging conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The utility model is a three-dimensional structural schematic diagram of a structure that facilitates heat dissipation of the square shell battery ear.
[0012] Legend
[0013] Water-absorbing sponge 1, water pipe 2, box body 3, high thermal conductivity foam 4, battery cell tab 5, battery cell 6. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] See also Figure 1The utility model discloses a structure that is convenient for heat dissipation of a square shell battery cell pole ear, comprising a box body 3, a battery cell 6 and a high thermal conductivity foam 4, wherein the battery cell has a battery cell pole ear 5, and the high thermal conductivity foam is arranged between the battery cell pole ear and the box body, and a water-absorbing sponge 1 is arranged on the outer surface of the box body, and a water pipe 2 is arranged on one side of the water-absorbing sponge, and water droplets flow into the box body through the water pipe via the water-absorbing sponge, and the box body can prevent the water droplets from flowing into the battery cell pole ear.
[0016] In one embodiment, the gap between the battery cell tab and the box body is less than 2 mm.
[0017] In one embodiment, the thermal conductivity of the high thermal conductivity foam is greater than 1.5W.
[0018] The utility model discloses a structure that is convenient for heat dissipation of square shell battery cell pole ears, wherein the gap between the battery cell pole ears and the box body is less than 2 mm, which changes the transfer path between the battery cell pole ears and the box body, and facilitates the heat dissipation of the battery cell pole ears through the high thermal conductivity foam. In addition, the gap between the battery cell pole ears and the box body adopts foam materials with a thermal conductivity coefficient greater than 1.5W for heat transfer, and the structure of the box body adapting to the pole ears is adjusted, and the conduction efficiency is better. At the same time, a heat dissipation structure is newly added, and water droplets flow into the box body through the water pipe via the water absorbent sponge. The box body can prevent the water droplets from flowing into the battery cell pole ears, which is convenient for heat dissipation of the box body. Specifically, after the heat on the battery cell pole ears is transferred to the box body, the heat dissipation device starts to work, and the water pipe drops water on the water absorbent sponge, and the water evaporates through the water absorbent sponge to take away the heat on the box body.
[0019] The utility model discloses a structure that facilitates heat dissipation of the tabs of square-shell battery cells. First, the box corresponding to the tabs is sunk to minimize the gap between the tabs and the box, so that the heat generated at the tabs of the square-shell battery cells is transferred to the box; secondly, the gap between the tabs and the box is filled with a material with a high thermal conductivity to transfer the heat at the tabs to the box; finally, a heat dissipation device is added to the box to transfer the heat at the box to the air. The utility model discloses a square-shell battery cell structure that facilitates heat dissipation of the tabs, increases the heat transfer path of the battery cells, and reduces the temperature of the battery cells during charging and discharging conditions.
[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A structure that facilitates heat dissipation of the tabs of a square-shell battery cell, characterized in that: It includes a box body, a battery cell and high thermal conductivity foam, the battery cell has a battery cell ear, the high thermal conductivity foam is arranged between the battery cell ear and the box body, the outer surface of the box body is provided with a water-absorbing sponge, one side of the water-absorbing sponge is provided with a water pipe, water droplets flow into the box body through the water pipe via the water-absorbing sponge, and the box body is used to prevent the water droplets from flowing into the battery cell ear.
2. A structure for facilitating heat dissipation of the tabs of a square-shell battery cell according to claim 1, characterized in that: The gap between the battery cell tab and the box body is less than 2 mm.
3. The structure for facilitating heat dissipation of the tabs of a square-shell battery cell according to claim 2, characterized in that: The thermal conductivity of the high thermal conductivity foam is greater than 1.5W.