Liquid cooling plate structure for battery heat dissipation

Abstract

The utility model discloses a liquid cooling plate structure for battery heat dissipation, and relates to the technical field of battery heat dissipation, the liquid cooling plate structure for battery heat dissipation comprises a bracket and a liquid cooling plate assembly, the liquid cooling plate assembly comprises a runner plate, spoilers and an upper cover plate which are sequentially stacked on the bracket from bottom to top, the upper cover plate is connected with the outer edge of the runner plate in a sealing manner so as to cover the spoiler; a cold liquid cavity groove and a plurality of raised lines are arranged in the center of the upper surface of the runner plate, and when the spoilers are matched with the cold liquid cavity groove and the raised lines, transverse and longitudinal convection channels are formed in the spoilers; the upper cover plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both communicated with the transverse and longitudinal convection channel. The battery pack heat dissipation device is simple in structure, can effectively dissipate heat of the battery pack, and enhances the firmness at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery heat dissipation technical field more specifically, relate to a battery heat dissipation with liquid cooling plate structure. BACKGROUND

[0002] At present, the heat dissipation of battery pack generally adopts two forms of independent type and integrated type, wherein the integrated type is to directly weld the heat dissipation piece at the lower end of the battery pack box body, and then package the battery pack through the packaging shell, and the commonly used heat dissipation piece is a liquid cooling plate, which can heat the battery pack, but due to the difference in material between the liquid cooling plate and the battery pack box body, direct welding is extremely easy to cause the liquid cooling plate to deform in the welding process, thereby directly causing the low efficiency of heat exchange efficiency, and since the middle part of the liquid cooling plate needs to store cooling liquid, it is hollow, and the existing liquid cooling plate will deform at the hollow part due to the influence of the gravity of the battery pack after installation, thereby affecting the efficiency.

[0003] The utility model discloses a power battery liquid cooling plate, the battery liquid cooling plate includes lower plate body, upper plate body and insulating support strip, and the lower plate body has first board face and second board face, and a plurality of first installation hole and liquid cooling flow channel have on the first board face, and the upper plate body has third board face and fourth board face, and the third board face has water inlet, water outlet and with a plurality of second installation hole, and the insulating support strip is fixedly attached to the third board face, and the number of insulating support strips is multiple, and the multiple insulating support strips are arranged into at least two groups on the third board face, and each group of insulating support strips includes at least two insulating support strips arranged in parallel and spaced apart. By adopting the power battery liquid cooling plate, a flat reference can be formed on the contact surface of the liquid cooling plate and the battery film group, the contact integrity and the support stability are improved, and the heat dissipation uniform temperature effect is further improved. However, the above-mentioned liquid cooling plate not only has a complex structure, but also has a serious influence on the subsequent heat dissipation effect due to the welding deformation of the strength in the subsequent brazing process. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims at providing a battery heat dissipation with liquid cooling plate structure to solve the technical problems of the prior art that the battery heat dissipation with liquid cooling plate structure is complex, the structural strength needs to be further strengthened, and the heat dissipation needs to be further improved.

[0005] To achieve the above-mentioned purpose, the utility model provides a battery heat dissipation with liquid cooling plate structure, which comprises:

[0006] A bracket;

[0007] A liquid cooling plate assembly, comprising a flow channel plate, a spoiler and an upper cover plate stacked and placed on the bracket from bottom to top, the upper cover plate is sealingly connected with the outer edge of the flow channel plate to cover the spoiler;

[0008] The upper surface of the flow channel plate is provided with a cold liquid cavity groove and several protrusions located in the cold liquid cavity groove. When the baffle plate cooperates with the cold liquid cavity groove and the protrusions, a transverse and longitudinal convection channel is formed in the baffle plate.

[0009] The upper cover plate is provided with a liquid inlet and a liquid outlet, both of which are connected to the transverse and longitudinal convection channels.

[0010] Preferably, it also includes a plurality of sets of crossbeams disposed on the upper surface of the upper cover plate, wherein each crossbeam is parallel to the other and connected to the external battery pack.

[0011] Preferably, each edge of the cold liquid chamber is located within the upper surface of the flow channel plate, and the flow channel plate and the outer edge of the upper cover plate are welded and sealed together.

[0012] Preferably, the number of crossbeams is several groups, the several groups of crossbeams are parallel to each other and all are perpendicular to the length direction of the upper cover plate, the lower surface of each crossbeam is connected to the upper surface of the upper cover plate, and the external battery pack is fixedly mounted on the upper surface of the several groups of crossbeams.

[0013] Preferably, each of the crossbeams has a plurality of clearance holes along its length, and the upper cover plate has locking holes corresponding to each of the clearance holes. Each clearance hole is equipped with a locking element, and each locking element is threadedly connected to the corresponding locking hole, thereby fixing the corresponding crossbeam to the upper cover plate.

[0014] Preferably, a solder sheet is filled between the lower surface of each crossbeam and the upper surface of the upper cover plate.

[0015] Preferably, the liquid cooling plate assembly is made of aluminum, the upper surface of the upper cover plate is attached to the lower surface of the external battery pack, and polyurethane thermally conductive structural adhesive is filled between the two.

[0016] Preferably, the baffle is a multi-segment U-shaped staggered tooth structure connected end to end. The coolant cavity groove and the convex strip are adapted to the U-shaped staggered tooth structure so that the upper surface of each convex strip and the upper surface of the U-shaped staggered tooth structure abuts against the lower surface of the upper cover plate, and the lower surface of the U-shaped staggered tooth structure abuts against the lower surface of the flow channel plate.

[0017] Preferably, the locking element is a bolt.

[0018] Preferably, the bracket includes a plurality of trays arranged parallel to each other along the length of the flow channel plate and side connecting rods connected to both ends of the plurality of trays.

[0019] Compared with the prior art, this utility model has the following advantages and effects:

[0020] The liquid cooling plate structure for battery heat dissipation in this utility model consists of a bracket and a liquid cooling plate assembly. The liquid cooling plate requires brazing in a brazing furnace during production, and the brazing furnace requires a bracket to hold the product. Therefore, the liquid cooling plate assembly must first be placed on the lower bracket. The liquid cooling plate assembly needs to be placed stably to avoid interference that could cause operational inconvenience and affect efficiency. The liquid cooling plate assembly consists of a flow channel plate, a baffle plate, and a top cover plate. The flow channel plate has a cold liquid cavity and several protrusions, which are evenly distributed to form a cold liquid flow channel within the cold liquid cavity. The coolant flows and fills the cold liquid flow channel. The baffle plate is located in a sealed cavity formed by the flow channel plate and the top cover plate. This baffle plate is a wide-flow-section aluminum staggered tooth structure, thereby forming transverse and longitudinal convection channels within the cold liquid flow channel. This not only allows the coolant to flow evenly within the structural channels, forming a turbulent vortex structure, but also increases the heat transfer contact area between the carrier and the aluminum alloy, maximizing the efficiency and heat removal from the battery. Therefore, this liquid cooling plate assembly not only reduces the processing difficulty of the liquid cooling plate structure, but also ensures the heat dissipation performance of the internal flow channels of the liquid cooling plate structure and the overall sealing performance of the liquid cooling plate, and improves the service life of the liquid cooling plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the liquid cooling plate for battery heat dissipation in this embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the liquid cooling plate structure for battery heat dissipation in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the bracket structure in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the flow channel plate in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the upper cover plate and the baffle plate in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10-Bracket; 11-Pattern; 12-Side connecting rod;

[0028] 20-Liquid cooling plate assembly; 21-Flow channel plate; 211-Cooling liquid cavity tank; 212-Raised strip; 22-Break plate; 23-Top cover plate; 231-Liquid inlet; 232-Liquid outlet; 24-Locking component;

[0029] 30 - Crossbeam. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Please see Figures 1-5 As shown, this utility model embodiment provides a liquid cooling plate structure for battery heat dissipation. The liquid cooling plate structure for battery heat dissipation includes a bracket 10 and a liquid cooling plate assembly 20, wherein:

[0033] The liquid cooling plate assembly 20 includes a flow channel plate 21, a baffle plate 22 and an upper cover plate 23 stacked on the bracket 10 from bottom to top. The upper cover plate 23 is sealed to the outer edge of the flow channel plate 21 to cover the baffle plate 22.

[0034] The upper surface of the flow channel plate 21 is provided with a cold liquid cavity groove 211 and several protrusions 212 located in the cold liquid cavity groove 211. When the baffle 22 cooperates with the cold liquid cavity groove 211 and the protrusions 212, a transverse and longitudinal convection channel is formed in the baffle 22.

[0035] The upper cover plate 23 is provided with a liquid inlet 231 and a liquid outlet 232, both of which are connected to the transverse and longitudinal convection channels. The liquid inlet 231 and the liquid outlet 232 are located at one end of the upper cover plate 23. As the coolant flows in the transverse and longitudinal convection channels of the baffle plate 22, the coolant temperature gradually increases. The coolant with lower temperature is distributed on the side closer to the liquid inlet 231, while the coolant with higher temperature circulates back to the liquid outlet 232, which is located on the same side as the liquid inlet 231, to exchange heat. This ensures that the temperature difference between the left and right sides of the liquid cooling plate assembly 20 is small, avoiding... Free This leads to problems such as excessive temperature rise and temperature difference in the battery cells, ultimately increasing the lifespan of the battery module.

[0036] Specifically, in this embodiment, the liquid cooling plate structure for battery heat dissipation consists of a bracket 10 and a liquid cooling plate assembly 20. The liquid cooling plate needs to be brazed in a brazing furnace during the production process, and the brazing furnace needs to use the bracket 10 to place the product. Therefore, the liquid cooling plate assembly 20 needs to be placed on the lower bracket 10 first. The liquid cooling plate assembly 20 needs to be placed stably to avoid interference that would cause inconvenience to operation and affect efficiency. In a preferred embodiment, the liquid cooling plate assembly 20 is composed of a flow channel plate 21, a baffle plate 22, and an upper cover plate 23. The flow channel plate 21 is provided with a cold liquid cavity 211 and a plurality of protrusions 212. Each protrusion 212 is evenly distributed to form a cold liquid flow channel in the cold liquid cavity 211. The coolant flows and fills the cold liquid flow channel. The baffle plate 22 is located in the sealed cavity composed of the flow channel plate 21 and the upper cover plate 23, thereby forming a transverse and longitudinal convection channel in the cold liquid flow channel. The baffle plate 22 plays an important key role in both load-bearing and heat dissipation.

[0037] For example, in terms of load-bearing capacity, the upper and lower surfaces of the baffle plate 22 are both flat. The purpose of this is to ensure that the two flat surfaces of the baffle plate 22 make full contact with the inner surfaces of the flow channel plate 21 and the upper cover plate 23 during the assembly of the liquid cooling plate, so that the two pairs of contact surfaces can be fully melted and welded into a single structure during the subsequent brazing process, thereby significantly increasing its strength.

[0038] In addition, the baffle 22 acts as a corrugated structure layer in the integrated welded structure, which conforms to the principle of corrugated structure and further enhances the strength of the liquid cooling plate of the structure.

[0039] For example, in terms of uniform temperature thermal performance, the baffle plate 22 is an aluminum staggered tooth structure with a wide flow cross section, forming transverse and longitudinal convection channels. This not only allows the carrier to flow uniformly within the structural channels, forming a turbulent vortex structure, but also increases the heat transfer contact area between the carrier and the aluminum alloy, thereby removing the heat generated by the battery with the highest efficiency and maximum extent.

[0040] Compared to existing technologies, current liquid cooling plates mostly adopt a straight-line heat dissipation fin structure, with small grooves arranged in the flow channels between each straight heat dissipation fin to create turbulence in the cooling liquid, thereby enhancing the heat transfer effect of the cooling liquid. However, due to factors such as the friction of the groove walls, the cooling liquid in the small grooves has poor flow, which to some extent has an adverse effect on the heat dissipation effect.

[0041] There are also liquid cooling plates that achieve microchannel finned structures through design. Compared with the liquid cooling plate in this embodiment, the microchannel finned structure not only has a high processing cost, but also a relatively low production efficiency.

[0042] Therefore, the liquid cooling plate assembly 20 in this embodiment not only reduces the processing difficulty of the liquid cooling plate structure, but also ensures the heat dissipation performance of the internal flow channel of the liquid cooling plate structure and the overall sealing performance of the liquid cooling plate, and improves the service life of the liquid cooling plate.

[0043] The liquid cooling plate structure for battery heat dissipation in this embodiment is not only widely used in energy storage battery packs such as PACK48S, PACK52S and PACK104S, but can also be widely used in various new energy battery packs.

[0044] For further details, please refer to Figure 1 , 2 As shown, the liquid cooling plate structure for battery heat dissipation also includes several sets of crossbeams 30 disposed on the upper surface of the upper cover plate 23, with each crossbeam 30 being parallel to each other and connected to the external battery pack.

[0045] Thus, the upper cover plate 23 and the flow channel plate 21 are connected to the battery pack through each set of crossbeams 30, avoiding deformation of the upper cover plate 23 and the flow channel plate 21 caused by direct welding.

[0046] For further details, please refer to Figure 4 As shown, each edge of the cold liquid chamber 211 is located within the upper surface of the flow channel plate 21, and the flow channel plate 21 and the outer edge of the upper cover plate 23 are welded and sealed together.

[0047] In this embodiment, the flow channel plate 21 has a rectangular shape. A cold liquid cavity 211 is provided at the center of the upper surface of the flow channel plate 21. Each edge of the cold liquid cavity 211 is located inside the upper surface of the flow channel plate 21. The cold liquid cavity 211 is used to hold coolant.

[0048] For further details, please refer to Figure 1 , 2 As shown, there are several sets of crossbeams 30, which are parallel to each other and perpendicular to the length direction of the upper cover plate 23. The lower surface of each crossbeam 30 is connected to the upper surface of the upper cover plate 23, and the external battery pack is fixedly mounted on the upper surface of the several sets of crossbeams 30.

[0049] In this embodiment, there are three sets of crossbeams 30, located on the left, middle and right sides of the upper cover plate 23 respectively, and the three sets of crossbeams 30 are parallel to each other. Each crossbeam 30 is perpendicular to the length direction of the upper cover plate 23, and the lower surface of each crossbeam 30 is connected to the upper surface of the upper cover plate 23. The external battery pack is fixedly mounted on the upper surface of the crossbeam 30.

[0050] For further details, please refer to Figure 1 , 2As shown, each crossbeam 30 has several clearance holes along its length, and the upper cover plate 23 has locking holes that correspond one-to-one with each clearance hole. Each clearance hole has a locking element, and each locking element is threadedly connected to the corresponding locking hole, thereby fixing the corresponding crossbeam 30 to the upper cover plate 23.

[0051] In this embodiment, each locking element is a bolt, and each locking element is threadedly connected to the corresponding locking hole, thereby fixing the corresponding crossbeam 30 to the upper cover plate 23. A solder sheet is provided between the lower surface of each crossbeam 30 and the upper surface of the upper cover plate 23. In this way, the connection strength between the crossbeam 30 and the upper cover plate 23 can be strengthened by melting the solder sheet into one piece to form a brazed connection.

[0052] Furthermore, in a specific embodiment of this utility model, a solder sheet is filled between the lower surface of each crossbeam 30 and the upper surface of the upper cover plate 23.

[0053] Therefore, by attaching the upper cover plate 23 to the battery pack and setting solder sheets, it is convenient to conduct subsequent brazing connections, so that the solder sheets are completely melted into one piece, thereby strengthening the connection strength.

[0054] Furthermore, in a specific embodiment of this utility model, the liquid cooling plate assembly 20 is made of aluminum, the upper surface of the upper cover plate 23 is attached to the lower surface of the external battery pack, and polyurethane thermally conductive structural adhesive is filled between the two.

[0055] Therefore, it is manufactured and formed by brazing all aluminum components together, and plays a major role in temperature uniformity, heat transfer and load-bearing in the overall liquid cooling plate structure.

[0056] For further details, please refer to Figure 4 , 5 As shown, the baffle 22 is a U-shaped structure with multiple segments connected end to end. The coolant cavity groove 211 and the ridge 212 are adapted to the U-shaped structure so that the upper surface of each ridge 212 is in contact with the middle groove of the U-shaped structure.

[0057] In this embodiment, by matching the U-shaped structure of each protrusion 212 with the baffle 22, each protrusion 212 abuts against the lower surface of the upper cover plate 23, thereby enhancing the load-bearing capacity between the upper cover plate 23 and the flow channel plate 21 and preventing deformation due to the weight of the battery pack.

[0058] In addition, the structure of the baffle 22 adopts a U-shaped structure, which makes the baffle 22 compatible with the coolant cavity groove 211 and the protrusion 212 on the flow channel plate 21, ensuring the overall structural strength, and also forming transverse and longitudinal convection channels, so that the coolant can flow evenly in the transverse and longitudinal convection channels, forming a turbulent vortex structure.

[0059] For further details, please refer toFigure 1 , 3 As shown, the bracket 10 includes several trays 11 arranged parallel to each other along the length of the flow channel plate 21 and side connecting rods 12 connected to both ends of the trays 11.

[0060] Therefore, by placing several parallel and spaced support plates 11 between two parallel side connecting rods 12, and using the support plates 11 to support and fix the top liquid cooling plate assembly 20, the liquid cooling plate assembly 20 is stably placed as a whole, ensuring that the parts do not leak out during the brazing process.

[0061] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A liquid cooling plate structure for battery heat dissipation, characterized in that, include: Bracket (10); The liquid cooling plate assembly (20) includes a flow channel plate (21), a baffle plate (22) and an upper cover plate (23) stacked on the bracket (10) from bottom to top. The upper cover plate (23) is sealed to the outer edge of the flow channel plate (21) to cover the baffle plate (22). The upper surface of the flow channel plate (21) is provided with a cold liquid cavity groove (211) and a number of protrusions (212) located in the cold liquid cavity groove (211). When the baffle (22) cooperates with the cold liquid cavity groove (211) and the protrusions (212), a transverse and longitudinal convection channel is formed in the baffle (22). The baffle (22) is a U-shaped staggered tooth structure with multiple segments connected end to end. The coolant cavity groove (211) and the convex strip (212) are adapted to the U-shaped staggered tooth structure so that the upper surface of each convex strip (212) and the U-shaped staggered tooth structure abuts against the lower surface of the upper cover plate (23), and the lower surface of the U-shaped staggered tooth structure abuts against the lower surface of the flow channel plate (21). The upper cover plate (23) is provided with an inlet (231) and an outlet (232), both of which are connected to the transverse and longitudinal convection channels.

2. The liquid cooling plate structure for battery heat dissipation as described in claim 1, characterized in that: It also includes several sets of crossbeams (30) disposed on the upper surface of the upper cover plate (23), each of the crossbeams (30) being parallel to each other and connected to the external battery pack.

3. The liquid cooling plate structure for battery heat dissipation as described in claim 1, characterized in that: Each edge of the cold liquid chamber (211) is located within the upper surface of the flow channel plate (21), and the flow channel plate (21) and the outer edge of the upper cover plate (23) are welded and sealed together.

4. The liquid cooling plate structure for battery heat dissipation as described in claim 2, characterized in that: The number of the crossbeams (30) is several groups, the several groups of crossbeams (30) are parallel to each other and are all perpendicular to the length direction of the upper cover plate (23). The lower surface of each crossbeam (30) is connected to the upper surface of the upper cover plate (23), and the external battery pack is fixedly mounted on the upper surface of the several groups of crossbeams (30).

5. The liquid cooling plate structure for battery heat dissipation as described in claim 2, characterized in that: Each of the crossbeams (30) has a plurality of clearance holes along its length direction. The upper cover plate (23) has locking holes that correspond one-to-one with each of the clearance holes. Each clearance hole is equipped with a locking element. Each locking element is threadedly connected to the corresponding locking hole, thereby fixing the corresponding crossbeam (30) to the upper cover plate (23).

6. The liquid cooling plate structure for battery heat dissipation as described in claim 2, characterized in that: A solder sheet is provided between the lower surface of each of the crossbeams (30) and the upper surface of the upper cover plate (23).

7. The liquid cooling plate structure for battery heat dissipation as described in claim 1, characterized in that: The liquid cooling plate assembly (20) is made of aluminum. The upper surface of the upper cover plate (23) is attached to the lower surface of the external battery pack, and polyurethane thermally conductive structural adhesive is filled between them.

8. The liquid cooling plate structure for battery heat dissipation as described in claim 5, characterized in that: The locking element is a bolt.

9. The liquid cooling plate structure for battery heat dissipation as described in claim 1, characterized in that, The bracket (10) includes a plurality of trays (11) arranged parallel to each other along the length of the flow channel plate (21) and side connecting rods (12) connected to both ends of the plurality of trays (11).

Images