Liquid cooling plate and battery pack

Abstract

The utility model provides a liquid cooling plate and a battery pack, and belongs to the technical field of secondary batteries. The utility model provides a liquid cooling plate which comprises a first shell, a second shell and a runner plate, and the runner plate is arranged between the first shell and the second shell. The side, close to the first shell, of the runner plate is provided with a first concave area, the side, close to the second shell, of the runner plate is provided with a second concave area, and the first concave area and the second concave area are arranged in a staggered mode. A first cavity is formed between the first concave area and the first shell, and a second cavity is formed between the second concave area and the second shell. The number of parts needed by the liquid cooling plate is small, the structure is simple, and therefore the installation space occupied by the liquid cooling plate is small. According to the liquid cooling plate, the first shell, the second shell and the runner plate are matched, so that the whole liquid cooling plate has relatively good structural strength, the liquid cooling plate has relatively high deformation resistance, the risk that the liquid cooling plate is deformed and damaged is reduced, and the power battery can keep relatively good working stability.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of secondary batteries, and specifically to a liquid cooling plate and a battery pack. Background Art

[0002] Power batteries are a common energy storage device. In order to solve the heat dissipation problem caused by the increasing charge and discharge rates of power batteries, the existing power battery thermal management solution adds liquid cooling plates around the power batteries. Limited by the application environment of power batteries, the liquid cooling plates installed on the side of the power battery are designed to be small in thickness and size to avoid occupying too much space.

[0003] However, power batteries have the problem of thermal expansion after long-term use. The thermal expansion of power batteries will produce a large deformation force on the liquid cooling plate on the side, resulting in the risk of deformation damage to the liquid cooling plate using the above design, which in turn has a negative impact on the normal operation of the power battery. Utility Model Content

[0004] The present application provides a liquid cooling plate and a battery pack, which can enable the liquid cooling plate to have good structural strength and occupy a small space.

[0005] In a first aspect, the present application provides a liquid cooling plate, comprising a first shell, a second shell and a flow channel plate, wherein the flow channel plate is disposed between the first shell and the second shell. A first recessed area is disposed on a side of the flow channel plate close to the first shell, and a second recessed area is disposed on a side of the flow channel plate close to the second shell, wherein the first recessed area and the second recessed area are arranged alternately. A first cavity is formed between the first recessed area and the first shell, and a second cavity is formed between the second recessed area and the second shell.

[0006] Through the above scheme, the liquid cooling plate includes a first shell, a second shell and a flow channel plate, so that the number of parts required for the liquid cooling plate is small and the structure is simple, so that the installation space occupied by the liquid cooling plate is small. The first recessed area and the second recessed area staggered on the flow channel plate can improve the structural strength of the flow channel plate. Through the cooperation between the first shell, the second shell and the flow channel plate, the liquid cooling plate as a whole has good structural strength, so that the liquid cooling plate has a strong ability to resist deformation, so as to reduce the risk of deformation and damage of the liquid cooling plate, so that the power battery can maintain good working stability.

[0007] In a possible design, the bottom of the first recessed area is set as a first straight section, the bottom of the second recessed area is set as a second straight section, the first shell is connected to the flow channel plate through the second straight section, and the second shell is connected to the flow channel plate through the first straight section.

[0008] Through the above scheme, since the first recessed area and the second recessed area are staggered, the first straight section and the second straight section are also staggered, so that a larger contact area is formed between the first shell and the second straight section, and between the second shell and the first straight section, respectively, so that a larger connection area is formed between the first shell and the flow channel plate, and between the second shell and the flow channel plate, so that a stronger connection strength is formed between the first shell and the flow channel plate, and between the second shell and the flow channel plate.

[0009] In a possible design, the width of the first straight section is greater than or equal to 8 mm, and / or the width of the second straight section is greater than or equal to 8 mm.

[0010] Through the above scheme, under the premise of not significantly affecting the flow of the coolant in the first cavity and the second cavity, the width of the first straight section and the second straight section can be appropriately increased to increase the contact area between the first shell and the second straight section, and between the second shell and the first straight section, thereby forming a good connection strength between the first shell and the second straight section, and between the second shell and the first straight section.

[0011] In a possible design, the distance between the plane where the first straight section is located and the plane where the second straight section is located is less than or equal to 3 mm.

[0012] Through the above scheme, the above arrangement can further compress the space occupied by the liquid cooling plate, thereby further reducing the installation space required for the liquid cooling plate.

[0013] In a possible design, the liquid cooling plate further includes a reinforcing plate, which is a frame structure and is disposed outside the first recessed area and the second recessed area. The reinforcing plate is disposed between the flow channel plate and the first shell, and / or the reinforcing plate is disposed between the flow channel plate and the second shell.

[0014] Through the above scheme, the reinforcing plate can support the edge areas of the first shell and the second shell from the areas outside the first recessed area and the second recessed area, so that the edge areas of the liquid cooling plate have better structural strength, and then the liquid cooling plate as a whole has better structural strength, so as to reduce the risk of damage to the liquid cooling plate due to expansion of the battery pack.

[0015] In a possible design, the distance between the plane where the first straight section is located and the plane where the second straight section is located is equal to the thickness of the reinforcing plate.

[0016] Through the above scheme, this setting form uses the reinforcing plate to fill the edge area between the plane where the first straight section is located and the plane where the second straight section is located, combined with the first shell connected to the flow channel plate through the second straight section, and the second shell connected to the flow channel plate through the first straight section, so that the flow channel plate can support each other with the first shell and the second shell at multiple positions. Therefore, the flow channel plate and even the entire liquid cooling plate have better support and structural strength to reduce the risk of damage to the liquid cooling plate due to battery pack expansion. In addition, the above setting form can also avoid the reinforcing plate from occupying additional space, so as to reduce the installation space required for the liquid cooling plate.

[0017] In a possible design, the liquid cooling plate further includes at least two water pipe joints, which are arranged in the first shell or the second shell, and at least one water pipe joint is connected to the first cavity, and at least one water pipe joint is connected to the second cavity.

[0018] Through the above scheme, the arrangement of the water pipe joint communicating with the first cavity or the second cavity enables the coolant to enter and exit the first cavity or the second cavity, so that the coolant can exchange heat with different areas of the liquid cooling plate, thereby enabling the liquid cooling plate to have a better heat dissipation effect.

[0019] In a possible design, a communicating hole is provided on the flow channel plate in an area away from the water pipe joint so as to communicate the first cavity with the second cavity.

[0020] Through the above scheme, the first cavity and the second cavity are connected through the connecting hole, so that the flow of cooling liquid between the first cavity and the second cavity can be achieved, so as to reduce the number of water pipe joints for the entry and exit of cooling liquid, thereby reducing the installation space occupied by the water pipe joints, and further reducing the installation space required for the liquid cooling plate.

[0021] In a possible design, an inclined section is formed between the first straight section and the second straight section, and the communicating hole is at least partially located in the inclined section.

[0022] Through the above scheme, the connection between the first shell and the second straight section, and between the second shell and the first straight section will not affect the normal use of the connecting hole, ensuring that after the flow channel plate, the first shell and the second shell are assembled, the coolant can still flow between the first cavity and the second cavity through the connecting hole.

[0023] In a second aspect, the present application further provides a battery pack, comprising a battery module, a box, and a liquid cooling plate in any embodiment of the first aspect, wherein the battery module and the liquid cooling plate are both installed in the box. Liquid cooling plates are provided on opposite sides of the battery module, and a heat-conducting structural adhesive is provided between the liquid cooling plate and the battery module.

[0024] The beneficial effects of the battery pack provided in each possible design of the second aspect can be referred to the beneficial effects brought about by the first aspect and each possible implementation method of the first aspect, and will not be repeated here.

[0025] In summary, the liquid cooling plate in the embodiment of the present application occupies a small installation space while having good overall structural strength, so that the liquid cooling plate has a strong ability to resist deformation, thereby reducing the risk of deformation damage to the liquid cooling plate, thereby allowing the power battery to maintain good working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an explosion of a battery pack provided in an embodiment of the present application.

[0027] Figure 2 An exploded schematic diagram of a liquid cooling plate provided in an embodiment of the present application.

[0028] Figure 3 A schematic cross-sectional view of a liquid cooling plate provided in an embodiment of the present application.

[0029] Figure 4 A schematic cross-sectional view of a flow channel plate provided in an embodiment of the present application.

[0030] Figure 5 A schematic diagram of the structure of a reinforcement plate provided in an embodiment of the present application.

[0031] Figure 6 A schematic diagram of the assembly structure of a liquid cooling plate and a battery module provided in an embodiment of the present application.

[0032] Figure 7 A schematic diagram of the structure of a flow channel plate provided in an embodiment of the present application.

[0033] Figure 8 for Figure 7 A local enlarged schematic diagram of position A in the middle.

[0034] Figure symbols: 1. liquid cooling plate; 11. first shell; 12. second shell; 13. flow channel plate; 131. first recessed area; 1311. first straight section; 132. second recessed area; 1321. second straight section; 133. inclined section; 134. connecting hole; 14. first cavity; 15. second cavity; 16. reinforcing plate; 17. water pipe joint; 2. battery pack; 21. battery module; 22. box; 23. bottom cold plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application.

[0040] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0041] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0042] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure can refer to a physical connection. For example, the physical connection can be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through a screw, bolt or other barrier; the physical connection can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The "connection" or "connection" of a circuit structure can refer to not only a physical connection, but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be an indirect connection through at least one intermediate element, as long as the circuit is connected, and it can also be the internal connection of two elements; the signal connection can refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Figure 1 A schematic diagram of an explosion of a battery pack provided in an embodiment of the present application.

[0044] like Figure 1 As shown, the present application provides a battery pack 2, including a battery module 21, a box 22 and a liquid cooling plate 1, wherein the battery module 21 and the liquid cooling plate 1 are both installed in the box 22. Liquid cooling plates 1 are provided on opposite sides of the battery module 21, and a heat-conducting structural adhesive is provided between the liquid cooling plate 1 and the battery module 21.

[0045] The battery module 21 is composed of multiple battery cells connected in series or in parallel, and the battery pack 2 is a complete energy storage unit composed of one or more battery modules 21. The battery pack 2 can meet the power demand of electric vehicles and other equipment, and the battery pack 2 has an important impact on the power performance and safety performance of battery vehicles.

[0046] Thermally conductive structural adhesive is a material used to improve the heat dissipation performance of electrical components, mainly composed of a resin matrix and filler.

[0047] The thermally conductive structural adhesive not only has a bonding effect, so that a good connection strength is formed between the battery module 21 and the liquid cooling plate 1. The thermally conductive structural adhesive can also effectively transfer heat, so that the heat generated by the battery module 21 can be transferred to the liquid cooling plate 1 through the thermally conductive structural adhesive, and a better heat dissipation effect is achieved through the cooperation of the thermally conductive structural adhesive and the liquid cooling plate 1.

[0048] The box body 22 can not only provide installation space for the battery module 21 and the liquid cooling plate 1, but also block the pollution caused by the external environment and weaken the external impact force that may be received during use, so that the battery module 21 and the liquid cooling plate 1 are protected by the box body 22, thereby enabling the battery pack 2 to have better working stability.

[0049] The opposite sides of the battery module 21 refer to two side surfaces of the battery module 21 that face each other.

[0050] Optionally, both opposite sides of the battery module 21 are sides of the battery module 21 where no poles are provided, so as to prevent the liquid cooling plate 1 from affecting the connection between the poles and interfering with the function of the poles.

[0051] Optionally, the surfaces on opposite sides of the battery module 21 are the two opposite sides with the largest size of the battery module 21, so that a larger heat conduction area can be formed between the liquid cooling plate 1 and the battery module 21, so that the liquid cooling plate 1 has a better heat dissipation effect on the battery module 21.

[0052] The specific structural form of the liquid cooling plate 1 will be described in detail below and will not be expanded here.

[0053] See also Figure 1 In an optional embodiment, the battery pack 2 further includes a bottom cold plate 23 , and the bottom cold plate 23 is disposed at the bottom of the box body 22 .

[0054] The bottom cold plate 23 can effectively dissipate heat from the battery module 21 from the bottom of the box 22, thereby improving the heat dissipation effect of the battery pack 2. In addition, the bottom cold plate 23 and the box 22 cooperate together to support and protect the battery module 21.

[0055] In actual production applications, the bottom cold plate 23 and the box body 22 can be welded by using a stir friction welding process. Since stir friction welding has the characteristics of small heat-affected zone, high degree of automation, no need for welding wire and shielding gas, and safe and environmentally friendly welding process, the welding quality and welding efficiency between the bottom cold plate 23 and the box body 22 are higher, and the impact on the environment during welding is reduced.

[0056] Figure 2 This is an exploded schematic diagram of a liquid cooling plate provided in an embodiment of the present application. Figure 3 A cross-sectional schematic diagram of a liquid cooling plate provided in an embodiment of the present application, Figure 4A schematic cross-sectional view of a flow channel plate provided in an embodiment of the present application.

[0057] like Figures 2 to 4 As shown, the present application provides a liquid cooling plate 1, comprising a first shell 11, a second shell 12 and a flow channel plate 13, wherein the flow channel plate 13 is disposed between the first shell 11 and the second shell 12. A first recessed area 131 is disposed on a side of the flow channel plate 13 close to the first shell 11, and a second recessed area 132 is disposed on a side of the flow channel plate 13 close to the second shell 12, wherein the first recessed area 131 and the second recessed area 132 are arranged alternately. A first cavity 14 is formed between the first recessed area 131 and the first shell 11, and a second cavity 15 is formed between the second recessed area 132 and the second shell 12.

[0058] In actual production applications, the first shell 11 and the second shell 12 may be made of materials with good thermal conductivity and high strength, such as copper alloy, aluminum alloy, aluminum nitride, silicon carbide, etc. The use of the above materials can make the first shell 11 and the second shell 12 have good thermal conductivity and certain structural strength.

[0059] The first shell 11 and the second shell 12 constitute the outer shell of the liquid cooling plate 1, which can not only protect the internal components including the flow channel plate 13, but also transfer the heat emitted by the battery module 21 to the inside of the liquid cooling plate 1, so that the liquid cooling plate 1 can play a better heat dissipation role.

[0060] The flow channel plate 13 can be prepared by a stamping process, so that the flow channel plate 13 has higher structural strength and processing accuracy, as well as higher material utilization and production and processing efficiency, thereby reducing the production and processing cost of the flow channel plate 13.

[0061] Exemplarily, the blank of the flow channel plate 13 is in the shape of a flat plate, and a punch head is used to punch one side of the flat plate blank in the thickness direction so that the punch head punches out a first recessed area 131 on the blank, and the unpunched portion is the second recessed area 132 .

[0062] In another example, the blank of the flow channel plate 13 is in the shape of a flat plate, and a punch head is used to punch one side of the flat plate-shaped blank in the thickness direction, so that the punch head punches out a first recessed area 131 on the blank. The blank is then turned over, and the punch head is punched toward the other side of the flat plate-shaped blank in the thickness direction, so that the punch head punches out a second recessed area 132 on the blank.

[0063] In another example, the blank of the flow channel plate 13 is in the shape of a flat plate, and the punch head punches simultaneously on both sides of the flat plate in the thickness direction, so that the punch head punches out the first recessed area 131 and the second recessed area 132 on the blank at the same time.

[0064] In actual production applications, the material of the flow channel plate 13 can be low-carbon steel, stainless steel, aluminum alloy or other metal materials with good plasticity, so that the flow channel plate 13 can obtain a better processing effect during stamping.

[0065] The staggered first recessed areas 131 and second recessed areas 132 can make the various parts of the flow channel plate 13 evenly stressed, and can improve the structural strength of the flow channel plate 13 to a certain extent, so that the liquid cooling plate 1 as a whole has better structural strength, thereby reducing the risk of deformation damage to the liquid cooling plate 1 caused by thermal expansion of the power battery, so as to avoid negative impact on the normal operation of the power battery.

[0066] The first cavity 14 formed between the first recessed area 131 and the first shell 11 can provide a storage space for the cooling liquid, so that heat exchange can be performed between the cooling liquid and the first shell 11, so that the cooling liquid can cool down the first shell 11, and then cool down the battery module 21 on the side where the first shell 11 is located.

[0067] The second cavity 15 formed between the second recessed area 132 and the second shell 12 can provide a storage space for the coolant, so that heat exchange can be performed between the coolant and the second shell 12, so that the coolant can cool the second shell 12, and then cool the battery module 21 on the side where the second shell 12 is located.

[0068] In addition, the first recessed area 131 and the second recessed area 132 can form a flow channel for the coolant to flow, and the staggered first recessed area 131 and the second recessed area 132 can improve the structural strength of the flow channel plate 13, so that the flow channel plate 13 as a whole has a stronger ability to resist deformation.

[0069] In actual production applications, the coolant in the liquid cooling plate 1 is generally a mixture of water and ethylene glycol, which has the advantages of low freezing point, high boiling point, corrosion resistance, good thermal conductivity, etc., so that the liquid cooling plate 1 can achieve better heat dissipation effect under different working conditions.

[0070] In the embodiment of the present application, the liquid cooling plate 1 includes a first shell 11, a second shell 12 and a flow channel plate 13, so that the number of parts required for the liquid cooling plate 1 is small and the structure is simple, so that the installation space occupied by the liquid cooling plate 1 is small. The first recessed area 131 and the second recessed area 132 staggered on the flow channel plate 13 can improve the structural strength of the flow channel plate 13. Through the cooperation between the first shell 11, the second shell 12 and the flow channel plate 13, the liquid cooling plate 1 has a good structural strength as a whole, so that the liquid cooling plate 1 has a strong ability to resist deformation, so as to reduce the risk of deformation and damage of the liquid cooling plate 1, and thus the power battery can maintain good working stability.

[0071] See also Figure 3and Figure 4 The bottom of the first recessed area 131 is set as the first straight section 1311, the bottom of the second recessed area 132 is set as the second straight section 1321, the first shell 11 is connected to the flow channel plate 13 through the second straight section 1321, and the second shell 12 is connected to the flow channel plate 13 through the first straight section 1311.

[0072] Since the first recessed area 131 and the second recessed area 132 are staggered, the first straight section 1311 and the second straight section 1321 are also staggered, so that a larger contact area is formed between the first shell 11 and the second straight section 1321, and between the second shell 12 and the first straight section 1311, respectively, so that a larger connection area is formed between the first shell 11 and the flow channel plate 13, and between the second shell 12 and the flow channel plate 13, thereby forming a stronger connection strength between the first shell 11 and the flow channel plate 13, and between the second shell 12 and the flow channel plate 13.

[0073] In addition, the staggered first straight sections 1311 and the second straight sections 1321 can evenly disperse the external forces acting on the first shell 11 and the second shell 12, thereby improving the ability of the liquid cooling plate 1 to withstand external pressure, thereby enabling the liquid cooling plate 1 to have better structural strength as a whole, thereby reducing the risk of damage to the liquid cooling plate 1 caused by the expansion of the battery pack 2.

[0074] In actual production applications, since the first shell 11, the second shell 12 and the flow channel plate 13 are mostly made of metal materials, the connection between the first shell 11 and the second straight section 1321, and between the second shell 12 and the first straight section 1311 can be welded to obtain better connection strength at a lower processing cost.

[0075] like Figure 4 As shown in the figure, W 1 is the width of the first straight section 1311, W 2 is the width of the second straight section 1321 .

[0076] In an optional embodiment, the width W of the first straight section 1311 is 1 Specifically, the width W of the first straight section 1311 is 1 It can be 8mm, 9mm, 10mm, etc.

[0077] In another optional embodiment, the width W of the second straight section 1321 is 2 Specifically, the width W of the second straight section 1321 is 2 It can be 8mm, 9mm, 10mm, etc.

[0078] In another optional embodiment, the width W of the first straight section 1311 is 1and the width W of the second straight section 1321 2 Are greater than or equal to 8mm.

[0079] Under the premise of not significantly affecting the flow of the cooling liquid in the first cavity 14 and the second cavity 15, the width W of the first straight section 1311 is 1 and the width W of the second straight section 1321 2 It can be appropriately increased to increase the contact area between the first shell 11 and the second straight section 1321, and between the second shell 12 and the first straight section 1311, so as to form a good connection strength between the first shell 11 and the second straight section 1321, and between the second shell 12 and the first straight section 1311.

[0080] like Figure 4 As shown in the figure, H is the distance between the plane where the first straight section 1311 is located and the plane where the second straight section 1321 is located.

[0081] The distance H between the plane where the first straight section 1311 is located and the plane where the second straight section 1321 is located is less than or equal to 3 mm. Specifically, the distance H between the plane where the first straight section 1311 is located and the plane where the second straight section 1321 is located can be 3 mm, 2 mm, 1 mm, etc. It should be noted that the distance H between the plane where the first straight section 1311 is located and the plane where the second straight section 1321 is located needs to be greater than zero.

[0082] The above arrangement can further compress the space occupied by the liquid cooling plate 1 , thereby further reducing the installation space required for the liquid cooling plate 1 .

[0083] Figure 5 A schematic diagram of the structure of a reinforcement plate provided in an embodiment of the present application.

[0084] like Figure 5 As shown, in an optional embodiment, the liquid cooling plate 1 further includes a reinforcing plate 16 , and the reinforcing plate 16 is disposed between the flow channel plate 13 and the first shell 11 .

[0085] See also Figure 2 and Figure 5 In another optional embodiment, the liquid cooling plate 1 further includes a reinforcing plate 16 , and the reinforcing plate 16 is disposed between the flow channel plate 13 and the second shell 12 .

[0086] like Figure 5 As shown, in another optional embodiment, the liquid cooling plate 1 further includes a reinforcing plate 16 , a reinforcing plate 16 is provided between the flow channel plate 13 and the first shell 11 , and a reinforcing plate 16 is also provided between the flow channel plate 13 and the second shell 12 .

[0087] Combination Figure 5The reinforcing plate 16 is a frame structure and is disposed outside the first recessed area 131 and the second recessed area 132 .

[0088] The reinforcing plate 16 can support the edge areas of the first shell 11 and the second shell 12 from areas outside the first recessed area 131 and the second recessed area 132, so that the edge areas of the liquid cooling plate 1 have better structural strength, and then the liquid cooling plate 1 as a whole has better structural strength, so as to reduce the risk of damage to the liquid cooling plate 1 caused by the expansion of the battery pack 2.

[0089] In actual production applications, since the material of the reinforcing plate 16 is mostly metal material, the connection method between the reinforcing plate 16 and the flow channel plate 13, the first shell 11, and the second shell 12 can be welding, so that the reinforcing plate 16 and other components can be sealed and connected with good connection strength, and can reduce the production and processing cost of the liquid cooling plate 1.

[0090] The distance between the plane where the first straight section 1311 is located and the plane where the second straight section 1321 is located is equal to the thickness of the reinforcing plate 16 .

[0091] This arrangement utilizes the reinforcing plate 16 to fill the edge area between the plane where the first straight section 1311 and the plane where the second straight section 1312 are located. In combination with the first shell 11 being connected to the flow channel plate 13 via the second straight section 1312, and the second shell 12 being connected to the flow channel plate 13 via the first straight section 1311, the flow channel plate 13 can support each other with the first shell 11 and the second shell 12 at multiple positions. Therefore, the flow channel plate 13 and even the entire liquid cooling plate 1 have better support and structural strength to reduce the risk of damage to the liquid cooling plate 1 due to the expansion of the battery pack 2.

[0092] In addition, the above arrangement can also prevent the reinforcement plate 16 from occupying additional space, thereby reducing the installation space required for the liquid cooling plate 1 .

[0093] It should be noted that the thickness of the reinforcing plate 16 may be the thickness of one reinforcing plate 16 or the cumulative thickness of multiple reinforcing plates 16 , and the specific meaning of the thickness of the reinforcing plate 16 corresponds to different application scenarios of the reinforcing plate 16 .

[0094] Specifically, when the reinforcing plate 16 is only disposed between the flow channel plate 13 and the first shell 11 or the reinforcing plate 16 is only disposed between the flow channel plate 13 and the second shell 12 , the thickness of the reinforcing plate 16 refers to the thickness of one reinforcing plate 16 .

[0095] When a reinforcing plate 16 is provided between the flow channel plate 13 and the first shell 11 , and a reinforcing plate 16 is also provided between the flow channel plate 13 and the second shell 12 , the thickness of the reinforcing plate 16 refers to the thickness of the two reinforcing plates 16 after being stacked.

[0096] Figure 6 A schematic diagram of the assembly structure of a liquid cooling plate and a battery module provided in an embodiment of the present application.

[0097] like Figure 2 and Figure 6 As shown, the liquid cooling plate 1 further includes at least two water pipe joints 17 , which are disposed in the first shell 11 or the second shell 12 , and at least one water pipe joint 17 is connected to the first cavity 14 , and at least one water pipe joint 17 is connected to the second cavity 15 .

[0098] The water pipe joint 17 is responsible for providing an inlet and outlet water pipe channel interface for the liquid cooling plate 1. Specifically, the water pipe joint 17 can control the inflow and outflow of the coolant, so that the liquid cooling plate 1 can use the flowing coolant to take away the heat to obtain a good heat dissipation effect.

[0099] The arrangement in which the water pipe joint 17 is connected to the first cavity 14 or the second cavity 15 allows the coolant to enter and exit the first cavity 14 or the second cavity 15, so that the coolant can exchange heat with different areas of the liquid cooling plate 1, thereby making the liquid cooling plate 1 have a better heat dissipation effect.

[0100] Figure 7 A schematic diagram of the structure of a flow channel plate provided in an embodiment of the present application, Figure 8 for Figure 7 A local enlarged schematic diagram of position A in the middle.

[0101] See also Figure 7 and Figure 8 A communicating hole 134 is provided in an area of ​​the flow channel plate 13 away from the water pipe joint 17 so as to communicate the first cavity 14 with the second cavity 15 .

[0102] The area on the flow channel plate 13 away from the water pipe joint 17 refers to the area on the flow channel plate 13 that is not opposite to the water pipe joint 17. The setting position of the connecting hole 134 can prevent the coolant flowing out of the water pipe joint 17 from directly passing through the connecting hole 134 into the adjacent chamber or the coolant from passing through the connecting hole directly into the water pipe joint 17 under the suction force of the water pipe joint 17, thereby affecting the normal flow of the coolant in the first cavity 14 and the second cavity 15, and further affecting the heat dissipation effect of the liquid cooling plate 1.

[0103] By connecting the first cavity 14 and the second cavity 15 through the connecting hole 134, the flow of cooling liquid between the first cavity 14 and the second cavity 15 can be achieved, so as to reduce the number of water pipe joints 17 for the inlet and outlet of cooling liquid, thereby reducing the installation space occupied by the water pipe joints 17, and further reducing the installation space required for the liquid cooling plate 1.

[0104] like Figure 4 and Figure 8As shown, an inclined section 133 is formed between the first straight section 1311 and the second straight section 1321 , and the communication hole 134 is at least partially located in the inclined section 133 .

[0105] The connecting hole 134 is at least partially located in the inclined section 133. The connection between the first shell 11 and the second straight section 1321, and between the second shell 12 and the first straight section 1311 will not affect the normal use of the connecting hole 134, ensuring that after the flow channel plate 13, the first shell 11 and the second shell 12 are assembled, the coolant can still flow between the first cavity 14 and the second cavity 15 through the connecting hole 134.

[0106] In actual production applications, the connecting hole 134 needs to occupy the entire width of the inclined section 133 so that the connecting hole 134 has a sufficiently large aperture, thereby avoiding the problem of excessive flow resistance when the coolant flows through the connecting hole 134, and then the coolant can flow between the first cavity 14 and the second cavity 15 through the connecting hole 134, so that the liquid cooling plate 1 can obtain a better heat dissipation effect.

[0107] In a specific embodiment, the liquid cooling plate 1 includes two water pipe joints 17, namely a first water pipe joint and a second water pipe joint, both of which are arranged on the first shell 11, and the first cavity 14 and the second cavity 15 are connected through the connecting hole 134. Among them, the first water pipe joint is only connected to the first cavity 14, the second water pipe joint passes through the first shell 11 and the flow channel plate 13, and the second water pipe joint is connected to the second cavity 15.

[0108] This arrangement allows the water pipe joints 17 to be arranged on the same side of the liquid cooling plate 1 , thereby reducing the space occupied by the water pipe joints 17 and reducing the installation space required when the liquid cooling plate 1 is used.

[0109] In addition, the above arrangement not only facilitates the connection between the water pipe joint 17 and the inlet and outlet pipes to reduce the installation difficulty of the liquid cooling plate 1 and improve the installation efficiency, but also makes the pipe layout on the liquid cooling plate 1 more reasonable and beautiful.

Claims

1. A liquid cooling plate, characterized in that: It comprises a first shell, a second shell and a flow channel plate, wherein the flow channel plate is arranged between the first shell and the second shell; A first recessed area is provided on one side of the flow channel plate close to the first shell, and a second recessed area is provided on one side of the flow channel plate close to the second shell, and the first recessed area and the second recessed area are arranged alternately; A first cavity is formed between the first recessed area and the first shell, and a second cavity is formed between the second recessed area and the second shell.

2. The liquid cooling plate according to claim 1, characterized in that: The bottom of the first recessed area is set as a first straight section, the bottom of the second recessed area is set as a second straight section, the first shell is connected to the flow channel plate through the second straight section, and the second shell is connected to the flow channel plate through the first straight section.

3. The liquid cooling plate according to claim 2, characterized in that: The width of the first straight section is greater than or equal to 8 mm, and / or the width of the second straight section is greater than or equal to 8 mm.

4. The liquid cooling plate according to claim 2, characterized in that: The distance between the plane where the first straight section is located and the plane where the second straight section is located is less than or equal to 3 mm.

5. The liquid cooling plate according to any one of claims 2 to 4, characterized in that: The liquid cooling plate further includes a reinforcing plate, which is a frame structure and is disposed outside the first recessed area and the second recessed area; The reinforcing plate is disposed between the flow channel plate and the first shell, and / or the reinforcing plate is disposed between the flow channel plate and the second shell.

6. The liquid cooling plate according to claim 5, characterized in that: The distance between the plane where the first straight section is located and the plane where the second straight section is located is equal to the thickness of the reinforcing plate.

7. The liquid cooling plate according to claim 2, characterized in that: The liquid cooling plate further includes at least two water pipe joints, which are arranged on the first shell or the second shell, and at least one of the water pipe joints is communicated with the first cavity, and at least one of the water pipe joints is communicated with the second cavity.

8. The liquid cooling plate according to claim 7, characterized in that: A communicating hole is provided on the flow channel plate in an area away from the water pipe joint so as to communicate the first cavity with the second cavity.

9. The liquid cooling plate according to claim 8, characterized in that: An inclined section is formed between the first straight section and the second straight section, and the communicating hole is at least partially located in the inclined section.

10. A battery pack, characterized in that: It comprises a battery module, a box and a liquid cooling plate as claimed in any one of claims 1 to 9, wherein the battery module and the liquid cooling plate are both installed in the box; The liquid cooling plates are arranged on opposite sides of the battery module, and a heat-conducting structural adhesive is arranged between the liquid cooling plates and the battery module.

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