Liquid cooling plate and battery pack

Abstract

The utility model relates to a liquid cooling plate and a battery pack. The liquid cooling plate comprises an upper liquid cooling plate, a lower liquid cooling plate, a heat insulation part and a supporting shell which are sequentially connected from top to bottom, the liquid cooling lower plate is provided with an inner concave structure which is concave in the direction far away from the liquid cooling upper plate, and the liquid cooling upper plate and the liquid cooling lower plate are connected to enable the inner concave structure to form a double-channel concentric-square-shaped flow channel for liquid circulation; the supporting shell is provided with a containing cavity which is sunken in the direction away from the heat insulation piece, the containing cavity is matched with the liquid cooling upper plate, the liquid cooling lower plate and the heat insulation piece, and the liquid cooling upper plate, the liquid cooling lower plate and the heat insulation piece are all arranged in the containing cavity and connected with the supporting shell. The heat insulation piece is arranged between the liquid cooling lower plate and the supporting shell, so that heat transfer and loss can be effectively reduced, the heat preservation performance of the liquid cooling plate is improved, the heat exchange efficiency is further improved, compared with a structure that the liquid cooling plate is directly connected with the bottom plate support, non-uniform heat transfer can be reduced, and the heat exchange efficiency is improved. And unnecessary heat loss or heat influence on the battery pack is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, specifically to a liquid cooling plate and a battery pack. Background Technology

[0002] Battery pack temperature management is crucial, directly impacting battery performance, lifespan, and safety. With the continuous improvement of battery energy density and the development of fast charge / discharge technologies, the heat generated during charging and discharging has increased significantly, placing increasingly stringent demands on heat dissipation systems. Liquid cooling technology, due to its efficient and uniform heat dissipation performance, has gradually become one of the mainstream solutions for battery thermal management.

[0003] A search reveals that, in the prior art, for example, patent CN201811210499.3 discloses a structurally reinforced liquid-cooled base plate, including a liquid-cooled plate and a base plate support for supporting the liquid-cooled plate. The liquid-cooled plate has a liquid flow channel inside, with at least one surface of the liquid-cooled plate protruding outwards. The base plate support has a receiving cavity, with one side of the liquid-cooled plate facing the receiving cavity, and the liquid flow channel on that side protruding towards the receiving cavity. However, the aforementioned structurally reinforced liquid-cooled base plate still has the following drawbacks in practical applications:

[0004] Firstly, the liquid cooling plate is supported by the base plate bracket, and the liquid cooling plate is directly connected to the base plate bracket without any heat insulation measures. This structure will aggravate the non-uniform heat transfer, and may even lead to unnecessary heat loss or cause thermal impact on the battery pack, further affecting the overall heat dissipation effect.

[0005] Secondly, the base plate bracket is made of sheet metal, which is made of metal. Using a metal base plate bracket will transfer heat to the liquid cooling plate, greatly reducing the heat dissipation effect of the liquid cooling plate on the battery cell. Moreover, condensation will form on the surface of the metal base plate bracket, which can cause battery pack insulation failure in severe cases. It has the disadvantages of serious condensation and heat loss. Utility Model Content

[0006] To address the problems existing in the prior art, the present disclosure aims to provide a liquid cooling plate and a battery pack. The liquid cooling plate, by insulating the lower liquid cooling plate with a heat-insulating component between it and the supporting housing, effectively reduces heat transfer and loss, improves the heat insulation performance of the liquid cooling plate, and further enhances heat exchange efficiency. Compared to a structure where the liquid cooling plate is directly connected to the base plate bracket, it reduces non-uniform heat transfer, minimizes unnecessary heat loss or thermal impact on the battery pack, and further improves the overall heat dissipation effect.

[0007] The liquid cooling plate and battery pack disclosed herein include a liquid cooling upper plate, a liquid cooling lower plate, a heat insulation component, and a supporting housing connected sequentially from top to bottom.

[0008] The liquid-cooled lower plate has a concave structure that is recessed away from the liquid-cooled upper plate. The liquid-cooled upper plate is connected to the liquid-cooled lower plate so that the concave structure forms a double-loop flow channel for the flow of liquid.

[0009] The supporting housing has a recessed cavity that extends away from the heat insulation component. The cavity is adapted to the liquid-cooled upper plate, the liquid-cooled lower plate, and the heat insulation component. The liquid-cooled upper plate, the liquid-cooled lower plate, and the heat insulation component are all placed inside the cavity and connected to the supporting housing.

[0010] Preferably, the supporting shell is provided with reinforcing ribs, which are located in the middle and at both ends of the side of the supporting shell near the heat insulation member, and the reinforcing rib in the middle is arranged to avoid the dual-path loop flow channel.

[0011] Preferably, the height of the reinforcing ribs at both ends of the supporting shell is A, and the total thickness of the liquid-cooled upper plate, the liquid-cooled lower plate, and the heat insulation component is B, satisfying: A > B.

[0012] Preferably, the material of the support shell is carbon fiber or plastic.

[0013] Preferably, the heat insulation component is heat insulation cotton.

[0014] Preferably, one end of the liquid-cooled upper plate and the liquid-cooled lower plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the dual-path loop flow channel.

[0015] Preferably, both the liquid inlet and the liquid outlet are connected to a water nozzle, one end of which is connected to the dual-path loop flow channel, and the other end of which is exposed on the side of the liquid-cooled upper plate away from the liquid-cooled lower plate.

[0016] Preferably, the dual-channel loop includes a dual-channel structure and single-channel structures connected to both ends of the dual-channel structure, and the single-channel structures at both ends are connected to the inlet and the outlet, respectively.

[0017] Preferably, the support housing has connecting holes on both ends of its edge, and connecting parts are provided in the connecting holes.

[0018] A battery pack including a liquid cooling plate as described above.

[0019] The advantages of the liquid cooling plate and battery pack disclosed herein are as follows:

[0020] 1. A liquid-cooled plate disclosed herein includes a liquid-cooled upper plate, a liquid-cooled lower plate, a heat insulation component, and a supporting shell connected sequentially from top to bottom. The liquid-cooled lower plate has a concave structure recessed away from the liquid-cooled upper plate. The connection between the liquid-cooled upper plate and the liquid-cooled lower plate allows the concave structure to form a double-loop flow channel for liquid flow. The supporting shell has a recessed cavity recessed away from the heat insulation component. The cavity is adapted to the liquid-cooled upper plate, the liquid-cooled lower plate, and the heat insulation component. The liquid-cooled upper plate, the liquid-cooled lower plate, and the heat insulation component are all placed within the cavity and connected to the supporting shell. By providing a heat insulation component between the liquid-cooled lower plate and the supporting shell, heat transfer and loss can be effectively reduced, improving the thermal insulation performance of the liquid-cooled plate and further enhancing heat exchange efficiency. Compared to a structure where the liquid-cooled plate is directly connected to the base plate support, this reduces non-uniform heat transfer, minimizes unnecessary heat loss or thermal impact on the battery pack, and further improves the overall heat dissipation effect.

[0021] 2. The liquid cooling plate disclosed herein has a supporting shell made of carbon fiber or plastic; the heat insulation component is heat insulation cotton. The supporting shell is made of non-metallic material, which typically has a low thermal conductivity, effectively slowing down heat transfer and significantly reducing the impact of the metal structure on the heat dissipation effect of the liquid cooling plate. Furthermore, non-metallic materials have a lower probability of condensation, reducing the possibility of battery pack insulation failure caused by condensation. The heat insulation cotton effectively reduces heat transfer between the upper and lower liquid cooling plates and the supporting shell, while also providing a buffer for the dual-path loop flow channel.

[0022] 3. A battery pack, comprising the liquid cooling plate as described above. The liquid cooling plate reduces non-uniform heat transfer, minimizes unnecessary heat loss or thermal impact on the battery pack, further improves overall heat dissipation, and reduces the risk of condensation, thereby reducing the occurrence of battery pack insulation failures. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a liquid cooling plate and battery pack as described in this disclosure;

[0024] Figure 2 yes Figure 1 Exploded view;

[0025] Figure 3 This is a schematic diagram of the liquid cooling plate and the liquid cooling lower plate structure of the battery pack described in this disclosure;

[0026] Figure 4 This is a schematic diagram of the supporting housing structure of a liquid cooling plate and battery pack as described in this disclosure.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Liquid cooling upper plate;

[0029] 20 - Liquid-cooled lower plate; 201 - Recessed structure;

[0030] 30 - Thermal insulation;

[0031] 40 - Support shell; 401 - Reinforcing rib; 402 - Connection hole;

[0032] 50-Water tap. Detailed Implementation

[0033] like Figure 1 - Figure 4 As shown, the liquid cooling plate of this disclosure includes a liquid cooling upper plate 10, a liquid cooling lower plate 20, a heat insulation member 30 and a support shell 40 connected in sequence from top to bottom;

[0034] The liquid-cooled lower plate 20 has a concave structure 201 that is recessed away from the liquid-cooled upper plate 10. The connection between the liquid-cooled upper plate 10 and the liquid-cooled lower plate 20 makes the concave structure 201 form a double-loop flow channel for the flow of liquid. The double-loop flow channel consists of two main loops that form a loop or serpentine flow path inside the liquid-cooled plate. This loop structure helps to increase the length of the flow path of the coolant on the concave structure 201 of the liquid-cooled lower plate 20 and allows the cold fluid and hot fluid to be arranged alternately, which enhances the temperature uniformity of the liquid-cooled plate and thus improves the heat exchange efficiency. The concave structure 201 of the liquid-cooled lower plate 20 is formed by stamping.

[0035] The support housing 40 has a recessed cavity that is recessed away from the heat insulation member 30. The cavity is adapted to the liquid cooling upper plate 10, the liquid cooling lower plate 20 and the heat insulation member 30. The liquid cooling upper plate 10, the liquid cooling lower plate 20 and the heat insulation member 30 are all placed in the cavity and connected to the support housing 40.

[0036] By setting a heat insulation component 30 between the liquid-cooled lower plate 20 and the supporting housing 40, the heat transfer and loss can be effectively reduced, the heat insulation performance of the liquid-cooled plate can be improved, and the heat exchange efficiency can be further improved. Compared with the structure of directly connecting the liquid-cooled plate to the base plate bracket, it can reduce the non-uniform heat transfer, reduce unnecessary heat loss or thermal impact on the battery pack, and further improve the overall heat dissipation effect.

[0037] Furthermore, in this embodiment, the support housing 40 is provided with reinforcing ribs 401. The reinforcing ribs 401 are located in the middle and at both ends of the side of the support housing 40 near the heat insulation component 30, and the reinforcing ribs 401 in the middle are arranged to avoid the dual-path loop flow channel. The liquid cooling plate needs to be connected to the battery module. The reinforcing ribs 401 in the middle support the main plane of the liquid cooling upper plate 10 and the liquid cooling lower plate 20, which can effectively bear the weight of the battery module and prevent the dual-path loop flow channel from being damaged by pressure.

[0038] Furthermore, in this embodiment, the height of the reinforcing ribs 401 at both ends of the supporting shell 40 is A, and the total thickness of the liquid-cooled upper plate 10, the liquid-cooled lower plate 20 and the heat insulation component 30 is B, satisfying: A > B.

[0039] Furthermore, in this embodiment, the material of the supporting shell 40 is carbon fiber or plastic; the material of the supporting shell 40 is a non-metallic material. Non-metallic materials generally have a low thermal conductivity, which can effectively slow down the transfer of heat and significantly reduce the impact of the metal structure on the heat dissipation effect of the liquid cooling plate. In addition, non-metallic materials have a low probability of condensation, which can reduce the situation of battery pack insulation failure caused by condensation.

[0040] Carbon fiber or plastic is lightweight, high-strength, and has a low thermal conductivity, which is beneficial for heat insulation of liquid cooling plates. Furthermore, the supporting shell 40 is formed by injection molding or compression molding, which is simple, low-cost, and lightweight.

[0041] Furthermore, in this embodiment, the heat insulation component 30 is heat insulation cotton; heat insulation cotton is a material that can effectively block heat transfer. Through its own physical structure and chemical properties, it reduces the flow of heat, thereby achieving the effect of heat insulation. The use of heat insulation cotton in the heat insulation component 30 can effectively reduce the heat transfer between the liquid cooling upper plate 10 and the liquid cooling lower plate 20 and the supporting shell 40, and at the same time, it can buffer the flow channel position of the liquid cooling lower plate 20.

[0042] Furthermore, in this embodiment, one end of the liquid-cooled upper plate 10 and the liquid-cooled lower plate 20 is provided with a liquid inlet and a liquid outlet, both of which are connected to the dual-path loop flow channel; one end of the liquid-cooled upper plate 10 and the liquid-cooled lower plate 20 has two outwardly protruding structures, one being a liquid inlet and the other being a liquid outlet. The liquid inlet of the liquid-cooled upper plate 10 corresponds to the liquid inlet of the liquid-cooled lower plate 20, and the liquid outlet of the liquid-cooled upper plate 10 corresponds to the liquid outlet of the liquid-cooled lower plate 20, for the liquid inlet and liquid outlet of the dual-path loop flow channel.

[0043] Furthermore, in this embodiment, both the inlet and outlet are connected to a water nozzle 50. One end of the water nozzle 50 is connected to the dual-path loop flow channel, and the other end of the water nozzle 50 is exposed on the side of the liquid cooling upper plate 10 away from the liquid cooling lower plate 20.

[0044] The liquid cooling upper plate 10 and the liquid cooling lower plate 20 need to be connected together. After the liquid cooling lower plate 20 is stamped, it is connected to the liquid cooling upper plate 20. The two water nozzles 50 are brazed to the liquid inlet and liquid outlet respectively, and the water nozzles 50 are connected to the double loop flow channel.

[0045] Furthermore, in this embodiment, the dual-channel loop includes a dual-channel structure and single-channel structures connected to both ends of the dual-channel structure, and the single-channel structures at both ends are connected to the inlet and outlet respectively; that is, the part of the dual-channel loop connected to the inlet and outlet is the single-channel structure, while the dual-channel structure is the main part of the dual-channel loop, and is connected to both the single-channel structure connected to the inlet and the single-channel structure connected to the outlet, for the inflow and outflow of liquid within the dual-channel structure; the water temperature of the liquid within the dual-channel structure is at a median value, which can increase the heat dissipation area and make the temperature of the heat dissipation area more uniform.

[0046] Furthermore, in this embodiment, the two ends of the support housing 40 are provided with connection holes 402, and the connection holes 402 are provided with connectors; the connectors are nuts, which are used to connect with the battery module. The nuts are pre-embedded in the connection holes 402 and are directly connected to the battery module when in use.

[0047] A battery pack includes a liquid cooling plate as described above; the battery pack has a plurality of battery modules. By connecting the battery modules with the liquid cooling plate, the battery modules of the battery pack can be effectively cooled. According to the structure of the liquid cooling plate, non-uniform heat transfer can be reduced, unnecessary heat loss or thermal impact on the battery pack can be reduced, the overall heat dissipation effect can be further improved, and the risk of condensation can be reduced.

[0048] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0049] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims disclosed herein.

Claims

1. A liquid-cooled plate, characterized in that, It includes a liquid-cooled upper plate (10), a liquid-cooled lower plate (20), a heat insulation component (30), and a supporting shell (40) connected from top to bottom; The liquid-cooled lower plate (20) has a recessed structure (201) that is recessed away from the liquid-cooled upper plate (10), and the liquid-cooled upper plate (10) and the liquid-cooled lower plate (20) are connected such that the recessed structure (201) forms a double-loop flow channel for the flow of liquid. The supporting housing (40) has a recessed cavity that is recessed away from the heat insulation member (30). The cavity is adapted to the liquid cooling upper plate (10), the liquid cooling lower plate (20), and the heat insulation member (30). The liquid cooling upper plate (10), the liquid cooling lower plate (20), and the heat insulation member (30) are all placed in the cavity and connected to the supporting housing (40).

2. The liquid cooling plate according to claim 1, characterized in that, The supporting shell (40) is provided with reinforcing ribs (401). The reinforcing ribs (401) are located in the middle and at both ends of the side of the supporting shell (40) near the heat insulation member (30), and the reinforcing ribs (401) in the middle are arranged to avoid the double-path loop flow channel.

3. The liquid cooling plate according to claim 2, characterized in that, The height of the reinforcing ribs (401) at both ends of the supporting shell (40) is A, and the total thickness of the liquid-cooled upper plate (10), the liquid-cooled lower plate (20) and the heat insulation component (30) is B, satisfying: A > B.

4. The liquid cooling plate according to claim 1, characterized in that, The material of the support shell (40) is carbon fiber or plastic.

5. The liquid cooling plate according to claim 1, characterized in that, The heat insulation component (30) is heat insulation cotton.

6. The liquid cooling plate according to claim 1, characterized in that, One end of the liquid-cooled upper plate (10) and the liquid-cooled lower plate (20) is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the dual-path loop flow channel.

7. The liquid cooling plate according to claim 6, characterized in that, Both the liquid inlet and the liquid outlet are connected to a water nozzle (50). One end of the water nozzle (50) is connected to the dual-path loop channel, and the other end of the water nozzle (50) is exposed on the side of the liquid-cooled upper plate (10) away from the liquid-cooled lower plate (20).

8. The liquid cooling plate according to claim 7, characterized in that, The dual-channel loop includes a dual-channel structure and single-channel structures connected to both ends of the dual-channel structure, and the single-channel structures at both ends are connected to the inlet and the outlet, respectively.

9. The liquid cooling plate according to claim 1, characterized in that, The support housing (40) has connection holes (402) on both ends of its edge, and a connector is provided in the connection hole (402).

10. A battery pack, characterized in that, Includes the liquid cooling plate as described in any one of claims 1-9.

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