Thermal management structure, battery and battery module

Abstract

The utility model relates to the technical field of batteries, in particular to a thermal management structure, a battery and a battery module, the thermal management structure is provided with a battery cell and a liquid flow pipeline, the battery cell is provided with an electrode and a thermal management cavity, power can be supplied to the outside through the electrode, and the liquid flow pipeline is inserted into the thermal management cavity and attached to the inner wall of the thermal management cavity. The liquid flow pipeline is provided with a liquid inlet end and a liquid outlet end, external heat management liquid enters the liquid flow pipeline from the liquid inlet end of the heat management flow channel, exchanges heat with the inner wall of the heat management cavity and then flows out from the liquid outlet end, so that heat management in the battery core is realized, and the battery is provided with the heat management structure, so that the internal temperature of the battery is controlled; and the battery module performs thermal management on the interior of the battery through the thermal management structure, so that the performance of the battery module can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a thermal management structure, a battery and a battery module. Background Art

[0002] The main function of battery thermal management is to dissipate heat from the battery at high temperatures and to heat the battery or reduce heat dissipation at low temperatures, thereby keeping the battery operating stably.

[0003] For example, a battery module disclosed in the patent document with publication number CN218783111U includes a frame, a battery cell array and a cooling plate. A containing area is provided inside the frame. The battery cell array is composed of at least two battery cells arranged in an array and accommodated in the containing area. The cooling plate is detachably connected to the frame and covers the battery cell array. Thermal management of the battery cells is achieved through the battery cell array and the cooling plate fitted thereto.

[0004] Existing battery modules can achieve thermal management of battery cells by setting up a thermal management system, but the thermal management system generally forms heat exchange with the battery by bonding to the surface of the battery, making it difficult to effectively control the internal temperature of the battery, affecting the performance and service life of the battery. Utility Model Content

[0005] In view of this, it is necessary to provide a thermal management structure, a battery and a battery module to solve the technical problem that the thermal management structure in the prior art is difficult to control the internal temperature of the battery.

[0006] In order to achieve the above technical objectives, the technical solution of the utility model provides a thermal management structure, including:

[0007] A battery cell, provided with electrodes and a thermal management cavity;

[0008] A liquid flow pipeline is provided with a liquid inlet end and a liquid outlet end, wherein the liquid inlet end and the liquid outlet end are both located on a side of the thermal management cavity away from the electrode, the liquid flow pipeline is bent and folded, and the liquid flow pipeline is inserted into the thermal management cavity and fits against the inner wall of the thermal management cavity.

[0009] In some embodiments, the thermal management cavity passes through one end of the battery cell where the electrode is arranged, and an upper end of the thermal management cavity forms a socket for inserting the liquid flow pipeline.

[0010] In some embodiments, the liquid inlet and the liquid outlet both extend out of the thermal management cavity.

[0011] In some embodiments, the thermal management cavity is provided with a positioning plate, the positioning plate is fixed to the side wall of the thermal management cavity, the positioning plate is provided with two through holes, the liquid inlet end and the liquid outlet end are penetrated by the two through holes, and the end of the liquid flow pipe away from the electrode is against the positioning plate.

[0012] In some embodiments, the liquid flow conduit is made of aluminum alloy material.

[0013] In some embodiments, the surface of the liquid flow conduit is sprayed with insulating paint.

[0014] In order to achieve the above technical purpose, the technical solution of the utility model provides a battery, including the above thermal management structure.

[0015] In some embodiments, the battery further includes a shell and a top cover, the top of the shell is provided with an insertion port, the battery cell is inserted into the shell through the insertion port, and the top cover is provided on the insertion port.

[0016] In some embodiments, two welding holes are provided at the bottom of the shell, and the liquid inlet and the liquid outlet are respectively inserted into the two welding holes.

[0017] In order to achieve the above technical purpose, the technical solution of the utility model provides a battery module, including a plurality of the above-mentioned batteries, each of which is arranged side by side and fits together.

[0018] Compared with the prior art, the thermal management structure, battery and battery module of the utility model have the following beneficial effects: the thermal management structure is provided by setting battery cells and liquid flow pipes, the battery cells are provided with electrodes and thermal management cavities, and power can be supplied to the outside through the electrodes; the liquid flow pipes are inserted into the thermal management cavity and fit with the inner wall of the thermal management cavity; the liquid flow pipes are provided with a liquid inlet end and a liquid outlet end; the external thermal management liquid enters the liquid flow pipe from the liquid inlet end of the thermal management flow channel, exchanges heat with the inner wall of the thermal management cavity, and then passes out from the liquid outlet end, thereby realizing thermal management inside the battery cell; the battery realizes control of the internal temperature of the battery by setting the thermal management structure, thereby improving the performance and service life of the battery; the battery module manages the internal heat of the battery through the thermal management structure, so that there is no need to set a special thermal management structure between the batteries of the battery module, thereby reducing the volume of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a thermal management structure provided by an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of a battery provided by an embodiment of the utility model;

[0021] Figure 3 is a top view of a battery provided by an embodiment of the utility model;

[0022] Figure 4 is along Figure 3 Sectional view along line AA;

[0023] Figure 5 is an exploded view of a battery provided by an embodiment of the utility model;

[0024] Figure 6 It is a structural schematic diagram of a battery module provided by an embodiment of the utility model.

[0025] Among them, the reference numerals in the figure are:

[0026] 10—battery core 11—electrode 12—thermal management cavity

[0027] 20 - liquid flow pipe 21 - liquid inlet 22 - liquid outlet

[0028] 30—housing 31—insertion port 32—welding hole

[0029] 40—top cover 121—supply socket 122—positioning plate. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] The embodiment of the utility model provides a thermal management structure, which solves the technical problem that the thermal management structure in the prior art is difficult to control the internal temperature of the battery by directly performing internal heat exchange of the battery core.

[0032] like Figure 1 and 4 -5, the thermal management structure of this embodiment includes a battery cell 10 and a liquid flow pipe 20, the battery cell 10 is provided with an electrode 11 and a thermal management cavity 12; the liquid flow pipe 20 is provided with a liquid inlet end 21 and a liquid outlet end 22, the liquid inlet end 21 and the liquid outlet end 22 are both located on the side of the thermal management cavity 12 away from the electrode 11, the liquid flow pipe 20 is continuously bent from the liquid inlet end 21 to the liquid outlet end 22 to form a bent and folded structure, the liquid flow pipe 20 is inserted into the thermal management cavity 12 and fits with the inner wall of the thermal management cavity 12.

[0033] Specifically, the thermal management structure is provided by setting a battery cell 10 and a liquid flow pipe 20. The battery cell 10 is provided with an electrode 11 and a thermal management cavity 12, and power can be supplied to the outside through the electrode 11. The liquid flow pipe 20 is inserted into the thermal management cavity 12 and fits with the inner wall of the thermal management cavity 12. The liquid flow pipe 20 is provided with a liquid inlet end 21 and a liquid outlet end 22. The external thermal management liquid enters the liquid flow pipe 20 from the liquid inlet end 21 of the thermal management flow channel, exchanges heat with the inner wall of the thermal management cavity 12, and then passes out from the liquid outlet end 22, thereby realizing the thermal management inside the battery cell 10. The battery is provided with the heat pipe The thermal management structure is used to control the internal temperature of the battery and improve the performance and service life of the battery. Since the liquid inlet end 21 and the liquid outlet end 22 are both located on the side of the thermal management cavity 12 away from the electrode 11, it is possible to prevent the external thermal management liquid from contacting the electrode 11 and causing a short circuit of the electrode 11. The liquid flow pipe 20 is continuously bent from the liquid inlet end 21 to the liquid outlet end 22, which can increase the contact area between the liquid flow pipe 20 and the inner wall of the thermal management cavity 12, and increase the length of the liquid flow pipe 20, thereby improving the heat exchange between the liquid flow pipe 20 and the battery cell 10, thereby enhancing the thermal management effect inside the battery cell 10.

[0034] In this embodiment, the battery cell 10 is made of materials such as graphite, a separator, and lithium iron phosphate through processes such as coating and winding.

[0035] In this embodiment, the liquid flow pipeline 20 is made of aluminum alloy and is manufactured by extrusion and bending processes. Insulating paint is sprayed on the surface to form an insulating layer to insulate the surface of the liquid flow pipeline 20 .

[0036] It is understandable that the thermal management cavity 12 can be any structure such as square, cylindrical, etc. that can be used to install the liquid flow pipeline 20.

[0037] In one embodiment, Figure 1 and 4 As shown in Figure 5, the thermal management cavity 12 passes through one end of the battery cell 10 where the electrode 11 is set, and the upper end of the thermal management cavity 12 forms a supply socket 121 for inserting the liquid flow pipe 20. Specifically, through the provision of the supply socket 121, when assembling the thermal management structure, it is only necessary to insert the liquid flow pipe 20 into the thermal management cavity 12 through the supply socket 121, which facilitates the assembly of the thermal management structure.

[0038] In one embodiment, Figure 4 As shown, the liquid inlet 21 and the liquid outlet 22 both extend out of the thermal management cavity 12. Specifically, the liquid inlet 21 and the liquid outlet 22 extend out of the thermal management cavity 12, which facilitates the connection of the liquid flow pipe 20 to the battery housing and the supply and output of the thermal management liquid.

[0039] In one embodiment, Figure 4As shown, the thermal management cavity 12 is provided with a positioning plate 122, and the positioning plate 122 is fixed to the side wall of the thermal management cavity 12. The positioning plate 122 is provided with two through holes, and the liquid inlet end 21 and the liquid outlet end 22 are penetrated with the two through holes, and the end of the liquid flow pipe 20 away from the electrode 11 is against the positioning plate 122. Specifically, after the liquid flow pipe 20 is inserted into the thermal management cavity 12, the liquid inlet end 21 and the liquid outlet end 22 of the liquid flow pipe 20 pass through the two through holes respectively until the end of the liquid flow pipe 20 is against the positioning plate 122, so that the liquid flow pipe 20 can be positioned, and then the extension distance of the liquid inlet end 21 and the liquid outlet end 22 can be controlled, so as to facilitate the connection between the liquid inlet end 21 and the liquid outlet end 22 and the battery shell.

[0040] In this embodiment, the positioning plate 122 is located at the lower opening of the thermal management cavity 12 .

[0041] In one embodiment, the liquid flow conduit 20 is made of aluminum alloy. Specifically, aluminum alloy has good thermal conductivity, which can facilitate heat exchange between the liquid flow conduit 20 and the battery cell 10.

[0042] The embodiment of the utility model also provides a battery, such as Figure 4-5 Specifically, by setting the above thermal management structure, the battery can achieve thermal management inside the battery, improve the thermal management efficiency of the battery, and thus significantly improve the performance and service life of the battery.

[0043] In one embodiment, Figure 2-6 As shown, the battery further includes a shell 30 and a top cover 40. The top of the shell 30 is provided with an insertion port 31. The battery cell 10 is inserted into the shell 30 through the insertion port 31, and the top cover 40 is covered on the insertion port 31. Specifically, when assembling the battery, the battery cell 10 with the liquid flow pipe 20 inserted therein only needs to be installed inside the shell 30 through the insertion port 31, and then the top cover 40 is covered on the insertion port 31, so that the assembly of the battery can be completed, which provides convenience for the assembly of the battery.

[0044] In this embodiment, when the battery cell 10 is inserted, the electrode 11 of the battery cell 10 should face upward, and then the battery cell 10 is inserted through the bottom.

[0045] In this embodiment, after the top cover 40 is installed, the top cover 40 is fixed to the housing 30 by a welding process such as laser welding.

[0046] In one embodiment, Figure 4As shown, two welding holes 32 are provided at the bottom of the housing 30, and the liquid inlet end 21 and the liquid outlet end 22 are respectively inserted into the two welding holes 32. Specifically, after the battery cell 10 is inserted into the housing 30, the liquid inlet end 21 and the liquid outlet end 22 of the liquid flow pipe 20 are just aligned with the two welding holes 32, respectively. Therefore, after the battery cell 10 is inserted, it is only necessary to weld the liquid inlet end 21 and the liquid outlet end 22 of the liquid flow pipe 20 to the two welding holes 32 by a welding process such as laser welding.

[0047] The specific assembly process of the battery of this embodiment is: first, the liquid inlet end 21 and the liquid outlet end 22 of the liquid flow pipe 20 are facing downward and inserted into the thermal management cavity 12 through the supply plug port 121 of the battery cell 10, and then the battery cell 10 is inserted into the shell 30 through the insertion port 31 of the shell 30, so that the liquid inlet end 21 and the liquid outlet end 22 of the liquid flow pipe 20 are exactly aligned with the two welding holes 32 respectively, and then the liquid inlet end 21 and the liquid outlet end 22 are laser welded to the two welding holes 32, and then the top cover 40 is covered on the insertion port 31, and finally the top cover 40 is welded by laser welding.

[0048] In order to achieve the above technical purpose, the technical solution of the utility model provides a battery module, such as Figure 6 As shown, it includes several of the above-mentioned batteries, each of which is arranged side by side and fits together. Specifically, the battery module manages the heat inside the battery through the thermal management structure, thereby improving the performance of the battery module, and making it unnecessary to set a special thermal management structure between the batteries of the battery module, which can reduce the volume of the battery module.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal management structure, characterized in that: include: A battery cell, provided with electrodes and a thermal management cavity; and A liquid flow pipeline is provided with a liquid inlet end and a liquid outlet end, wherein the liquid inlet end and the liquid outlet end are both located on a side of the thermal management cavity away from the electrode, the liquid flow pipeline is bent and folded, and the liquid flow pipeline is inserted into the thermal management cavity and fits against the inner wall of the thermal management cavity.

2. The thermal management structure according to claim 1, characterized in that: The heat management cavity passes through one end of the battery core where the electrode is arranged, and the upper end of the heat management cavity forms a socket for inserting the liquid flow pipeline.

3. The thermal management structure according to claim 1, characterized in that: The liquid inlet end and the liquid outlet end both extend out of the thermal management cavity.

4. The thermal management structure according to claim 1, characterized in that: The thermal management cavity is provided with a positioning plate, the positioning plate is fixed to the side wall of the thermal management cavity, the positioning plate is provided with two through holes, the liquid inlet end and the liquid outlet end are penetrated by the two through holes, and the end of the liquid flow pipeline away from the electrode is against the positioning plate.

5. The thermal management structure according to claim 1, characterized in that: The liquid flow pipeline is made of aluminum alloy material.

6. The thermal management structure according to claim 1, characterized in that: The surface of the liquid flow pipeline is sprayed with insulating paint.

7. A battery, characterized in that: The thermal management structure comprises the thermal management structure according to any one of claims 1 to 6.

8. The battery according to claim 7, characterized in that It also includes a shell and a top cover. The top of the shell is provided with an insertion port, the battery cell is inserted into the shell through the insertion port, and the top cover is provided on the insertion port.

9. The battery according to claim 8, characterized in that The bottom of the shell is provided with two welding holes, and the liquid inlet end and the liquid outlet end are respectively inserted into the two welding holes.

10. A battery module, characterized in that: The invention comprises several batteries as claimed in claim 8, wherein the batteries are arranged side by side and attached to each other.

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