Electric vehicle battery structure convenient for heat dissipation

Abstract

The utility model discloses an electric vehicle battery structure convenient for heat dissipation. Comprising an outer shell, and a built-in cavity is formed in the outer shell; the battery cell group is arranged in the built-in cavity and comprises a first battery cell group and a second battery cell group which are arranged left and right, and the outer end of the first battery cell group and the outer end of the second battery cell group are respectively connected with the outer shell through heat conduction units or are directly connected with the outer shell; the substrate is arranged between the first battery cell group and the second battery cell group and is connected with the inner ends of the first battery cell group and the second battery cell group, and the substrate is connected with the outer shell through a heat conduction unit or is directly connected with the outer shell. According to the utility model, heat can be effectively transmitted to the outer shell, rapid heat dissipation is carried out through the whole outer surface of the outer shell, and the heat dissipation efficiency is improved; the outer shell can be connected with other metal parts of a vehicle body to enhance heat dissipation and conduction, can also be directly placed in a fluid medium, and can dissipate heat in both gas and liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to an electric vehicle battery structure which is convenient for heat dissipation. Background Art

[0002] With the development of the starting and acceleration performance of electric two-wheeled vehicles, the power batteries on the vehicles now have very high output power, and the volume of the energy storage device is required to be as small as possible. Therefore, it is necessary to increase the charge and discharge rate of the power system. The increase in rate brings about an increase in current, which increases the heat consumption of related components during operation, and the safety risk of thermal runaway of the system also increases accordingly.

[0003] There are two main types of charging, discharging and heat dissipation structures for existing electric two-wheeled vehicle energy storage systems: active and passive. Active heat dissipation systems require additional components such as heat exchangers, management modules, pipelines, and carrier media. Their disadvantages are large size, high complexity of system components, and reduced vehicle power consumption. Passive heat dissipation systems are greatly restricted by the shape and structure of the components, have low heat dissipation efficiency, and usually cannot exceed a charging rate of 0.5 times the capacity. Utility Model Content

[0004] The utility model addresses the deficiencies in the prior art and provides an electric vehicle battery structure that facilitates heat dissipation. It can improve heat dissipation efficiency during rapid charging, allowing heat to be quickly transferred to the outside of the system; reduce system complexity and streamline the total number of parts; increase volume density and improve assembly integration, with components nested within each other; and can adapt to a variety of exchange media and function normally in harsh environments and working conditions.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] Electric vehicle battery structure that facilitates heat dissipation, including

[0007] An outer shell, wherein the outer shell includes a built-in cavity;

[0008] A battery cell group, the battery cell group being arranged in the built-in cavity, including a first battery cell group and a second battery cell group arranged on the left and right, wherein the outer ends of the first battery cell group and the outer ends of the second battery cell group are respectively connected to the outer shell through a heat conduction unit or directly connected to the outer shell; and

[0009] A substrate is arranged between the first battery cell group and the second battery cell group and connected to inner ends of the first battery cell group and the second battery cell group. The substrate is connected to the outer shell through a heat conduction unit or directly connected to the outer shell.

[0010] In the above technical solution, preferably, the first battery cell group and the second battery cell group are respectively composed of a combination of several columnar battery cells.

[0011] In the technical scheme, preferably, the first group of battery cells and the second group of battery cells each comprise a plurality of columnar battery cells and a positioning unit arranged at both ends of the columnar battery cells, and the positioning unit comprises a plurality of accommodating grooves for mounting the end portions of the columnar battery cells, so that the corresponding columnar battery cells are combined into an integrated whole by the two positioning units.

[0012] In the technical scheme, preferably, the substrate is in abutment with the outer wall of the positioning unit.

[0013] In the technical scheme, preferably, the heat-conducting unit is insulating heat-conducting glue.

[0014] In the technical scheme, preferably, the heat-conducting unit is filled in the built-in cavity to fill the internal gap of the outer shell.

[0015] In the technical scheme, preferably, the heat-conducting unit is filled between all the outer surfaces of the group of battery cells and the inner wall of the outer shell and between the substrate and the inner wall of the outer shell.

[0016] In the technical scheme, preferably, the first group of battery cells and the second group of battery cells are symmetrically arranged in the built-in cavity.

[0017] In the technical scheme, preferably, the substrate is made of an alloy material.

[0018] In the technical scheme, preferably, the outer shell comprises an upper shell and a lower shell assembled with each other.

[0019] A sealing gasket or sealing glue is arranged between the upper shell and the lower shell.

[0020] The outer shell is made of a metal material.

[0021] The outer shell is connected with a metal part of a vehicle body.

[0022] The outer surface of the outer shell comprises a plurality of protruding lines.

[0023] The top of the outer shell is provided with a charging and discharging integrated connector and a one-way air valve.

[0024] The beneficial effects of the utility model are as follows:

[0025] The utility model can effectively transmit heat to the outer shell, rely on the entire outer surface of the outer shell to rapidly dissipate heat, improve the heat dissipation efficiency, and connect the outer shell with other metal parts of the vehicle body to enhance heat dissipation and conduction, or directly place the outer shell in a fluid medium to dissipate heat in gas and liquid. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model is an outer shell schematic diagram.

[0027] Figure 2 Another perspective view of the shell body of the utility model.

[0028] Figure 3 The exploded view of the utility model.

[0029] Figure 4 The section view of the utility model.

[0030] Figure 5 The cooperation state schematic diagram of the cell group and the substrate of the utility model.

[0031] Figure 6 The substrate schematic diagram of the utility model.

[0032] Figure 7 The positioning unit schematic diagram of the utility model. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in conjunction with the drawings and specific embodiments:

[0034] Referring to Figures 1-7 The electric vehicle battery structure convenient for heat dissipation comprises an outer shell body 1, a cell group 2 and a substrate 3.

[0035] For the outer shell body 1, the upper shell body 11 and the lower shell body 12 are assembled in cooperation, and the two can be assembled in a fastener locking mode or in a buckle cooperation form, etc. As a preferred embodiment, the material of the outer shell body 1 is metal material, so as to facilitate heat dissipation, and specifically, an aluminum alloy material can be used.

[0036] The charge-discharge integrated connector 41 and the one-way air valve 42 are arranged at the top position of the outer shell body 1, as shown in Figures 1-3 So as to reduce the pressure of the charge-discharge integrated connector 41 and the one-way air valve 42 in the fluid medium.

[0037] In order to improve the sealing property of the outer shell body 1, in the embodiment, a sealing gasket or sealing glue is arranged between the upper shell body 11 and the lower shell body 12.

[0038] In order to facilitate the heat dissipation of the outer shell body 1, in the embodiment, the outer shell body 1 can be connected with the metal part of the vehicle body, so as to enhance the heat dissipation conduction, and meanwhile, a plurality of protruding lines 13 are arranged on the outer surface of the outer shell body 1, so as to increase the contact area of the outer shell body 1 and the medium and enhance the heat dissipation effect.

[0039] In the embodiment, the heat generated by the cell group 2 in the inner part of the outer shell body 1 is conducted to the outer shell body 1, and then the outer shell body 1 is heat dissipated outward, and the outer shell body 1 can be placed in the fluid medium during work, and can be heat dissipated in the gas and liquid. How the cell group 2 in the inner part conducts the heat to the outer shell body 1 will be described below.

[0040] Furthermore, the outer shell 1 can be designed with a protection level of IPX7, so that the battery can be charged at 2C in a liquid medium and at 1C in water.

[0041] In this embodiment, after the upper shell 11 and the lower shell 12 are assembled, a built-in cavity for accommodating the battery cell group 2 and the substrate 3 is formed inside the outer shell 1, wherein the battery cell group 2 includes a first battery cell group 21 and a second battery cell group 22 arranged on the left and right, and the first battery cell group 21 and the second battery cell group 22 respectively include a plurality of columnar battery cells 23 and positioning units 24 arranged at both ends of the columnar battery cells 23. As one embodiment, the first battery cell group 21 and the second battery cell group 22 have the same structure, including the same number of columnar battery cells 23 and the same number and structure of positioning units 24. Of course, the number of columnar battery cells may be different.

[0042] For the positioning unit 24, as Figure 5 、 Figure 7 As shown, it includes several accommodating grooves 241 for receiving the ends of the cylindrical battery cells 23. The entire structure can be integrally formed from several circular components, each of which includes a corresponding accommodating groove 241. The accommodating grooves 241 are open at both ends to expose the outer ends of the cylindrical battery cells 23. Positioning units 24 are arranged at both ends of the cylindrical battery cells 23 to combine the corresponding cylindrical battery cells 23 into a whole, forming the first battery cell group 21 and the second battery cell group 22.

[0043] like Figure 5 As shown, the substrate 3 is arranged between the first battery cell group 21 and the second battery cell group 22. At the same time, the inner end of the first battery cell group 21 and the inner end of the second battery cell group 22 are respectively abutted against the two side walls of the substrate 3 (the inner end of the battery cell group connected to the substrate 3 can be the positioning unit 24 and / or the inner end of the columnar battery cell 23), so that the heat of the two battery cell groups can be concentrated on the substrate 3.

[0044] Furthermore, a heat conducting unit (not shown in the figure) is filled in the outer shell 1 to fill the remaining gaps in the outer shell 1. The heat conducting unit serves as a connector between the substrate 3 and the outer shell 1, as a connector between the outer wall of the columnar battery cell 23 and the outer shell 1, and as a connector between the outer ends of the first and second battery cell groups and the outer shell 1 (the outer ends of the first and second battery cell groups include the positioning unit 24 and the outer ends of the columnar battery cell 23), so that the heat on the first battery cell group 21, the second battery cell group 22 and the substrate 3 can be conducted to the outer shell 1, including all outer surfaces of the columnar battery cell 23 (including the pole piece), and the heat is quickly dissipated through the outer surface of the metal outer shell 1, thereby improving the heat dissipation efficiency.

[0045] As one embodiment, the substrate 3 is made of alloy material and can be a plate-like component, such as Figure 6The substrate is one of the structural forms; the heat conduction unit is an insulating heat conduction glue, and the first battery cell group 21 and the second battery cell group 22 are symmetrically arranged in the built-in cavity.

[0046] As one of the embodiments, the outer end of the first battery cell group 21, the outer end of the second battery cell group 22 and the substrate 3 can be directly connected with the outer shell 1.

[0047] The internal parts are bridged by one main part of the substrate 3 to two battery cell modules (such as PACK battery cell modules), the number of parts is small, the overall stability is improved, the outer shell 1 can be connected to the metal parts of the whole vehicle, and the area of the heat dissipation assembly is increased.

[0048] As one of the embodiments, the outer shell 1 is fixed on the frame by two bolts through the right upper and lower bolt mounting holes, and a handrail is mounted on the battery shell, and only needs to loosen the bolts to realize quick disassembly and assembly.

[0049] The battery structure of the application can work in a higher environment temperature, the system components are less, the integration is high, the volume is small and the weight is light, which is beneficial to improve the power-to-weight ratio of the whole vehicle. The battery protection level is higher, and the battery can also work in a harsh environment. The charger is adapted to the same waterproof level as the battery, and the whole heat dissipation efficiency is higher when they are immersed in a fluid substance. After the charging and discharging integrated port is connected with the charger charging port, the socket can adopt IP67 protection level, and the whole battery can adopt IPX7 waterproof level.

[0050] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. An electric vehicle battery structure that facilitates heat dissipation, characterized by: include An outer shell, wherein the outer shell includes a built-in cavity; A battery cell group is arranged in the built-in cavity, including a first battery cell group and a second battery cell group arranged on the left and right, wherein the outer ends of the first battery cell group and the outer ends of the second battery cell group are respectively connected to the outer shell through a heat conduction unit or directly connected to the outer shell; as well as A substrate is arranged between the first battery cell group and the second battery cell group and connected to inner ends of the first battery cell group and the second battery cell group. The substrate is connected to the outer shell through a heat conduction unit or directly connected to the outer shell.

2. The electric vehicle battery structure for facilitating heat dissipation according to claim 1, characterized in that: The first battery cell group and the second battery cell group are respectively composed of a plurality of columnar battery cells.

3. The electric vehicle battery structure for facilitating heat dissipation according to claim 1, characterized in that: The first cell group and the second cell group respectively include a plurality of columnar cells and positioning units arranged at both ends of the columnar cells. The positioning units include a plurality of accommodating grooves for installing the ends of the columnar cells, so that the corresponding columnar cells are combined into one through the two positioning units.

4. The electric vehicle battery structure for facilitating heat dissipation according to claim 3, characterized in that: The base plate abuts against an outer wall of the positioning unit.

5. The electric vehicle battery structure for facilitating heat dissipation according to any one of claims 1 to 4, characterized in that: The heat conducting unit is an insulating heat conducting adhesive.

6. The electric vehicle battery structure for facilitating heat dissipation according to claim 5, characterized in that: The heat conducting unit is filled in the built-in cavity to fill the internal gap of the outer shell.

7. The electric vehicle battery structure for facilitating heat dissipation according to claim 5, characterized in that: The heat conduction unit is filled between all outer surfaces of the battery core group and the inner wall of the outer shell, and between the substrate and the inner wall of the outer shell.

8. The electric vehicle battery structure for facilitating heat dissipation according to claim 1, characterized in that: The first battery cell group and the second battery cell group are symmetrically arranged in the built-in cavity.

9. The electric vehicle battery structure for facilitating heat dissipation according to any one of claims 1 to 4 or 8, characterized in that: The substrate is made of alloy material.

10. The electric vehicle battery structure for facilitating heat dissipation according to any one of claims 1 to 4 or 8, characterized in that: The outer shell includes an upper shell and a lower shell assembled with each other; A sealing gasket or sealant is arranged between the upper shell and the lower shell; The outer shell is made of metal; The outer shell is connected to the metal part of the vehicle body; The outer surface of the housing includes a plurality of protruding lines; A charging and discharging integrated socket and a one-way air valve are arranged at the top of the outer shell.

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