Cold plate structure, battery pack and power device

Abstract

The utility model provides a cold plate structure, a battery pack and a power plant, the cold plate structure is used for cooling a battery module in the battery pack, the cold plate structure comprises: a cold plate main body in which a first cavity and a second cavity are arranged; the first runner is positioned in the first cavity so as to cool one side of the cold plate main body; and the second runner is positioned in the second cavity so as to cool the other side of the cold plate main body. The cold plate structure disclosed by the utility model can improve the use quality of the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a cold plate structure. The utility model also relates to a battery pack provided with the above cold plate structure, and the utility model further relates to a power device provided with the above battery pack. Background Art

[0002] A battery pack refers to an overall system that integrates a lithium-ion battery pack, a battery management system (BMS), and other necessary electrical components and encapsulates them in a protective container. It is widely used in electric vehicles and rechargeable battery systems as a power source and energy storage device. The main function of the battery pack is to store electrical energy and deliver the electrical energy to an electric motor to drive the vehicle or power other devices.

[0003] In order to ensure that the battery pack can work properly in a high-temperature environment and extend its service life, most modern electric vehicle battery packs are equipped with a cooling device. Among them, the cold plate structure is an important cooling method. The cold plate structure takes away the heat generated by the battery pack by means of the coolant flowing inside the cold plate, so as to maintain the battery pack within a suitable operating temperature range. Currently, the cold plate is usually made of a high thermal conductivity material, such as aluminum alloy or copper metal. Copper has a better thermal conductivity effect, but the cost is high. Therefore, aluminum alloy is more common in passenger car battery packs. The existing cold plate generally has a flow channel designed inside to guide the coolant flow so as to be able to cool the battery module. However, the existing cold plate generally has a single-layer flow channel inside, and the cooling effect on the battery module is not good enough, which is not conducive to improving the use quality of the battery pack. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a cold plate structure to improve the use quality of the battery pack.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A cold plate structure for cooling a battery module in a battery pack, the cold plate structure comprising:

[0007] A cold plate main body, wherein the cold plate main body has a first cavity and a second cavity;

[0008] A first flow channel, the first flow channel being located in the first cavity to cool one side of the cold plate main body;

[0009] A second flow channel, the second flow channel being located in the second cavity to cool the other side of the cold plate main body.

[0010] Further, it further comprises a partition plate, and the partition plate divides the cold plate main body into the first cavity and the second cavity.

[0011] Further, both the cold plate body and the partition are made of aluminum profiles.

[0012] Further, the cold plate body is provided with a liquid inlet and a liquid outlet, and the liquid inlet ends and the liquid outlet ends of the first flow channel and the second flow channel are respectively communicated with the liquid inlet and the liquid outlet.

[0013] Compared with the prior art, the present utility model has the following advantages:

[0014] Through the arrangement of the first flow channel and the second flow channel in the first cavity of the cold plate body of the present utility model, good cooling effects can be provided on both sides of the cold plate body, which is beneficial to providing a good cooling effect when the cold plate structure is arranged in the battery pack, improving the cooling effect of the battery pack, and thus beneficial to improving the use quality of the battery pack.

[0015] The structural strength of the cold plate body is improved through the arrangement of the partition, and the structure is simple, which is beneficial to design and implementation.

[0016] Both the cold plate body and the partition are made of aluminum profiles, which is beneficial to the lightweight design of the cold plate body, and thus beneficial to the lightweight design of the battery pack, and further beneficial to improving the use quality of the battery pack.

[0017] The liquid inlet ends and the liquid outlet ends of the first flow channel and the second flow channel are respectively communicated with the liquid inlet and the liquid outlet of the cold plate body, which is beneficial to reducing the space occupied by the cold plate body in the battery pack, and thus beneficial to improving the space utilization rate inside the battery pack.

[0018] The present utility model also proposes a battery pack, which includes a shell body, a battery module arranged in the shell body, a control component arranged in the shell body, and the cold plate structure as described above arranged in the shell body;

[0019] The cold plate structure divides the shell body into a first accommodation cavity and a second accommodation cavity, and the battery modules are arranged in both the first accommodation cavity and the second accommodation cavity.

[0020] Further, the shell body includes a shell main body, and a left cover plate and a right cover plate arranged on the shell main body;

[0021] The first accommodation cavity is formed between the left cover plate and the cold plate body, and the second accommodation cavity is formed between the right cover plate and the cold plate body.

[0022] Further, a third accommodation cavity extends outward from the top of the shell body, and the control component is arranged in the third accommodation cavity.

[0023] Further, the control component includes a BMS board arranged in the third accommodation cavity, a BDU arranged in the third accommodation cavity, and an electrical connector arranged on the shell body;

[0024] The BMS board is electrically connected to the BDU and the electrical connector.

[0025] Furthermore, a thermal conductive adhesive is applied between the battery module and the cold plate body.

[0026] The battery pack of the present invention improves the cooling effect of the battery modules in the battery pack by disposing the cold plate body as described above, and provides a certain structural strength in the battery pack through the cold plate body, which is beneficial to improving the use quality of the battery pack.

[0027] The shell body includes the shell body, the left cover plate and the right cover plate, which is convenient for loading the battery module, has a simple structure, is easy to operate, and is conducive to design implementation.

[0028] By providing the third accommodating cavity, the control component can be arranged in the shell body, which is beneficial to the protection of the control component and improves the integration of the battery pack.

[0029] A thermal conductive adhesive is applied between the battery module and the cold plate body, which is beneficial to improving the heat transfer efficiency between the battery module and the cold plate body. The setting of the thermal conductive adhesive can fix the battery module on the cold plate body and reduce the shaking of the battery module in the cold plate body.

[0030] The utility model also proposes a power device, in which the battery pack as described above is provided.

[0031] The power device described in the utility model has the same beneficial effects as the battery pack of the prior art and the utility model, so it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 This is a structural schematic diagram of the cold plate structure described in an embodiment of the utility model;

[0034] Figure 2 It is a cross-sectional view of the cold plate structure described in the embodiment of the utility model;

[0035] Figure 3 A first exploded view of a battery pack according to an embodiment of the present utility model;

[0036] Figure 4 A second exploded view of the battery pack according to an embodiment of the present utility model;

[0037] Figure 5Schematic structural diagram of the embodiment of the present utility model;

[0038] Explanation of reference numerals in the drawings:

[0039] 1, cold plate main body; 2, first flow channel; 3, second flow channel; 4, partition; 5, liquid inlet; 6, liquid outlet;

[0040] 7, housing main body;

[0041] 701, housing main body; 702, left cover plate; 703, right cover plate;

[0042] 8, first accommodation cavity; 9, second accommodation cavity; 10, third accommodation cavity; 11, boss;

[0043] 12, control component;

[0044] 1201, BMS board; 1202, BDU; 1203, electrical connector;

[0045] 13, battery module;

[0046] t, first cavity; k, second cavity. Specific implementation manners

[0047] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0048] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] Taking the battery pack where the cold plate main body described in the present utility model is located as an example, the orientation terms such as "upper, lower, left, right, front, rear" used in the embodiment are defined based on the up-down direction (also known as the height direction, or the overall package Z direction), left-right direction (also known as the width direction, or the overall package Y direction), and front-rear direction (also known as the length direction, or the overall package X direction) of the battery pack. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, "inner" and "outer" defined based on the contour of the battery pack, the side closer to the middle of the battery pack is "inner", and vice versa is "outer".

[0050] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0051] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0052] Embodiment 1

[0053] This embodiment relates to a cold plate structure, which is beneficial to improving the use quality of the battery pack by optimizing the internal structure of the cold plate structure.

[0054] In terms of the overall structure, as Figure 1 and Figure 2 shown, the cold plate structure in this embodiment is used to cool the battery module 13 in the battery pack, and includes: a cold plate main body 1, a first flow channel 2, and a second flow channel 3.

[0055] Among them, the cold plate main body 1 has a first cavity t and a second cavity k. The first flow channel 2 is located in the first cavity t to cool one side of the cold plate main body 1, and the second flow channel 3 is located in the second cavity k to cool the other side of the cold plate main body 1.

[0056] With the above settings, in this embodiment, through the settings of the first flow channel 2 and the second flow channel 3 in the first cavity t of the cold plate main body 1, both sides of the cold plate main body 1 can provide good cooling effects. When the cold plate structure is arranged in the battery pack, it is beneficial to provide a good cooling effect, improve the cooling effect of the battery pack, and thus improve the use quality of the battery pack.

[0057] Based on the above overall description, in this embodiment, as an exemplary structure, in combination with Figure 1 and Figure 2 shown, the cold plate structure in this embodiment further includes a partition 4. The partition 4 divides the cold plate main body 1 into a first cavity t and a second cavity k. Through the setting of the partition 4, the structural strength of the cold plate main body 1 is improved, the structure is simple, and it is beneficial to design and implement.

[0058] Specifically, the cold plate main body 1 and the partition 4 in this embodiment are both made of aluminum profiles. For example, they can be made by aluminum profile extrusion, so that both the cold plate main body 1 and the partition 4 are made of aluminum profiles, which is beneficial to the lightweight design of the cold plate main body 1, and thus beneficial to the lightweight design of the battery pack, and further beneficial to improving the use quality of the battery pack.

[0059] To facilitate the arrangement of the cold plate main body 1 in the battery pack and occupy less space, the cold plate main body 1 of the cold plate structure in this embodiment is provided with a liquid inlet 5 and a liquid outlet 6, and the liquid inlet ends and liquid outlet ends of the first flow channel 2 and the second flow channel 3 are respectively communicated with the liquid inlet 5 and the liquid outlet 6.

[0060] Specifically, the liquid inlet ends of the first flow channel 2 and the second flow channel 3 converge through a tee in the cold plate main body 1 and then communicate with the liquid inlet 5 of the cold plate main body 1. The liquid outlet ends of the first flow channel 2 and the second flow channel 3 converge through a tee in the cold plate main body 1 and then communicate with the liquid outlet 6 of the cold plate main body 1. The liquid inlet 5 and the liquid outlet 6 of the cold plate main body 1 are communicated with an external circulation device to facilitate circulating the coolant in the cold plate main body 1, so that the liquid inlet ends and liquid outlet ends of the first flow channel 2 and the second flow channel 3 are respectively communicated with the liquid inlet 5 and the liquid outlet 6 of the cold plate main body 1, which is beneficial to reducing the space occupied by the cold plate main body 1 in the battery pack and improving the space utilization rate inside the battery pack.

[0061] In this embodiment, a first cavity t and a second cavity k are formed in the cold plate main body 1. The first flow channel 2 is arranged in the first cavity t, the second flow channel 3 is arranged in the second cavity k, and a partition 4 is arranged between the first cavity t and the second cavity k to form a sandwich-type structure. The structural strength of the cold plate main body 1 is improved through the partition 4. Through the first flow channel 2 and the second flow channel 3, the same cooling intensity can be provided for both side surfaces of the cold plate. Moreover, the setting of the double flow channels makes the cooling efficiency of the cold plate higher, which is beneficial to cooling the battery pack, thereby improving the cooling intensity of the battery pack.

[0062] Embodiment Two

[0063] This embodiment relates to a battery pack, and the cold plate structure in Embodiment One is provided in the battery pack in this embodiment.

[0064] In terms of the overall structure, as shown in combination with Figures 3 to 5 the battery pack in this embodiment includes a shell main body 7, a battery module 13 arranged in the shell main body 7, a control component 12 arranged in the shell main body 7, and the cold plate structure in Embodiment One arranged in the shell main body 7.

[0065] Among them, the cold plate structure divides the shell main body 7 into a first accommodation cavity 8 and a second accommodation cavity 9, and battery modules 13 are arranged in both the first accommodation cavity 8 and the second accommodation cavity 9.

[0066] With the above settings, the battery pack in this embodiment improves the cooling effect on the battery module 13 in the battery pack through the setting of the cold plate main body 1 in Embodiment One, and provides a certain structural strength in the battery pack through the cold plate main body 1, which is beneficial to improving the use quality of the battery pack.

[0067] Based on the above overall introduction, in this embodiment, as an exemplary structure, in combination withFigure 3 and Figure 4 As shown in Figure 4 , the housing main body 7 of the battery pack in this embodiment includes a housing main body 701, a left cover plate 702 and a right cover plate 703 provided on the housing main body 701.

[0068] Among them, a first accommodation cavity 8 is formed between the left cover plate 702 and the cold plate main body 1, and a second accommodation cavity 9 is formed between the right cover plate 703 and the cold plate main body 1. The housing main body 7 includes the housing main body 701, the left cover plate 702 and the right cover plate 703, which facilitates the loading of the battery module 13, has a simple structure, is easy to operate, and is conducive to design and implementation.

[0069] In order to facilitate the arrangement of the control component 12, a third accommodation cavity 10 is formed by the top of the housing main body 7 of the battery pack in this embodiment extending outward. The control component 12 is arranged in the third accommodation cavity 10. Through the setting of the third accommodation cavity 10, the control component 12 can be arranged in the housing main body 7, which is conducive to the protection of the control component 12 and the improvement of the integration of the battery pack.

[0070] Specifically, as shown in Figure 5 As shown in Figure 5 , a boss 11 extends outward from the top of the housing main body 7 in this embodiment, and the third accommodation cavity 10 is formed in the boss 11. The control component 12 includes a BMS board 1201 arranged in the third accommodation cavity 10, a BDU 1202 arranged in the third accommodation cavity 10, and an electrical connector 1203 arranged on the boss 11. Among them, the BMS board 1201 is electrically connected to the BDU 1202 and the electrical connector 1203. The BMS board 1201, the BDU 1202 and the electrical connector 1203 can all adopt the structures in the prior art, and the corresponding connection methods also adopt the connection methods in the prior art.

[0071] In this embodiment, as shown in Figures 3 to 5 As shown in Figures 3 to 5 , the housing main body 7 in this embodiment is divided into a first accommodation cavity 8 and a second accommodation cavity 9 by the cold plate main body 1, and battery modules 13 are arranged in both the first accommodation cavity 8 and the second accommodation cavity 9. In order to improve the heat conduction efficiency between the battery module 13 and the cold plate main body 1, heat-conducting glue is coated on the opposite surfaces of the battery module 13 and the cold plate main body 1, so that heat-conducting glue is provided between the battery module 13 and the cold plate main body 1, which is conducive to improving the heat transfer efficiency between the battery module 13 and the cold plate main body 1, and the setting of the heat-conducting glue can fix the battery module 13 on the cold plate main body 1 and reduce the shaking of the battery module 13 in the cold plate main body 1.

[0072] The battery module 13 in this embodiment uses square shell battery cells, and the large surfaces of the square shell battery cells are stacked downward. End plates are provided at the top and bottom of the battery module 13. When the battery module 13 is assembled into the battery pack, the end plates provide a certain pre-tightening force to the battery cells, and a buffer foam is provided between the battery module 13 and the housing main body 701.

[0073] When assembling the battery module 13 in this embodiment, first, the cold plate structure is welded into the housing main body 7. Thermal conductive glue is applied to the cold plate main body 1. After pre-tightening the battery module 13, it is loaded into the housing main body 7 and pressed against the cold plate main body 1. Glue is applied to the bottom and around the battery module 13. The connection copper bars and FPCs between the battery cells are welded. Then, the BDU 1202, BMS board 1201, and electrical connectors 1203 are installed in the third accommodation cavity 10. The copper bars and corresponding wire harnesses between the battery modules 13 are connected. The left cover plate 702 and the right cover plate 703 are fixed to the housing main body 7.

[0074] Through the setting of the cold plate structure in the first embodiment, the battery pack in this embodiment divides the interior of the housing main body 7 into a first accommodation cavity 8 and a second accommodation cavity 9, enabling good cooling effects for the battery modules 13 on both sides of the cold plate structure, which is beneficial to improving the cooling effect of the battery pack and thus beneficial to improving the usage quality of the battery pack. Through the setting of the third accommodation cavity 10, the control assembly 12 is integrated into the battery pack housing main body 7, which is beneficial to the utilization of the space inside the battery pack, improves the space utilization rate of the battery pack, and is beneficial to improving the usage quality of the battery pack.

[0075] Embodiment Three

[0076] This embodiment relates to a power device, and the power device in this embodiment is provided with the battery pack in the second embodiment.

[0077] Through the setting of the battery pack in the second embodiment, the power device in this embodiment can improve the cooling efficiency of the battery pack, contribute to improving the usage safety of the power device, and thus improve the usage quality of the power device. The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cold plate structure for cooling battery modules within a battery pack, characterized in that, The cold plate structure includes: A cold plate main body, within which there is a first cavity and a second cavity; A first flow channel, which is located within the first cavity to cool one side of the cold plate main body; A second flow channel, which is located within the second cavity to cool the other side of the cold plate main body.

2. The cold plate structure according to claim 1, wherein: It further includes a partition, which divides the cold plate main body into the first cavity and the second cavity.

3. The cold plate structure according to claim 2, wherein: Both the cold plate main body and the partition are made of aluminum profiles.

4. The cold plate structure according to any one of claims 1 - 3, wherein: The cold plate main body is provided with a liquid inlet and a liquid outlet, and the inlet ends and outlet ends of the first flow channel and the second flow channel are respectively connected to the liquid inlet and the liquid outlet.

5. A battery pack, wherein: It includes a housing main body, a battery module disposed within the housing main body, a control component disposed within the housing main body, and a cold plate structure according to any one of claims 1 - 4 disposed within the housing main body; The cold plate structure divides the housing main body into a first accommodation cavity and a second accommodation cavity, and the battery module is disposed within both the first accommodation cavity and the second accommodation cavity.

6. The battery pack according to claim 5, wherein: The housing main body includes a housing main body, and a left cover plate and a right cover plate disposed on the housing main body; The first accommodation cavity is formed between the left cover plate and the cold plate main body, and the second accommodation cavity is formed between the right cover plate and the cold plate main body.

7. The battery pack according to claim 6, wherein: A boss extends outward from the top of the housing main body, and there is a third accommodation cavity within the boss, and the control component is disposed within the third accommodation cavity.

8. The battery pack according to claim 7, wherein: The control component includes a BMS board disposed within the third accommodation cavity, a BDU disposed within the third accommodation cavity, and an electrical connector disposed on the housing main body; The BMS board is electrically connected to the BDU and the electrical connector.

9. The battery pack according to any one of claims 5 - 8, wherein: A thermal conductive adhesive is applied between the battery module and the cold plate main body.

10. A power device, wherein: The power device is provided with a battery pack according to any one of claims 5 - 9.

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