Liquid cooling plate, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and mainly relates to a liquid cooling plate, a battery pack and electric equipment. The liquid cooling plate is provided with a front face and a back face which are opposite to each other and a hollow area, the liquid cooling plate is provided with concave areas at the two opposite ends of the hollow area, the concave areas are provided with a first face and a second face which are opposite to each other, and the liquid cooling plate is provided with plane areas at the other two opposite ends of the hollow area. The plane area is provided with a third surface and a fourth surface which are opposite to each other, the front surface is taken as a reference surface, the height of the first surface is lower than that of the third surface, the height of the second surface is lower than that of the fourth surface, the liquid cooling plate is provided with a circulation cavity, and the circulation cavity is used for circulating liquid. The problems that a cross beam and an extension supporting mechanism on the edge of the cross beam are arranged, the extension supporting mechanism is used for bearing a battery module to reduce stress of a liquid cooling plate welding seam under the working conditions of vibration and impact, and due to the fact that the arranged cross beam and the extension of the cross beam are not beneficial to direct contact between a conventional liquid cooling plate and a battery, smoothness of a flow channel cannot be guaranteed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a liquid cooling plate, a battery pack and electrical equipment. Background Art

[0002] In order to suppress the temperature rise of the battery and avoid excessive temperature affecting the performance and life of the battery, the existing battery pack usually sets a liquid cooling plate between the battery module and the base plate. The coolant enters the liquid cooling plate through the pipe, exchanges heat with the bottom of the battery, and then flows out through the pipe. The liquid cooling plate is welded to the base plate and fully bears the weight of the battery cell. Under vibration and impact conditions, the weld mainly bears the load, and it is easy to cause the liquid cooling plate weld and the heat-affected zone to break. To prevent the above situation from happening, the existing battery pack usually sets a crossbeam and an extended support mechanism on the edge of the crossbeam. The extended mechanism is used to support the battery module to reduce the force on the liquid cooling plate weld under vibration and impact conditions. However, the set crossbeam and crossbeam extension are not conducive to direct contact between the conventional liquid cooling plate and the battery, and the flow channel cannot be guaranteed to be unobstructed. Utility Model Content

[0003] The purpose of this utility model is to provide a liquid cooling plate that solves the problem of battery packs that are equipped with crossbeams and extended support mechanisms at the edges of the crossbeams, using the extended mechanisms to support battery modules and reduce the stress on the welds of the liquid cooling plate under vibration and impact conditions. Because the crossbeams and extended crossbeams are not conducive to direct contact between the conventional liquid cooling plate and the battery, the flow channel cannot be guaranteed to be unobstructed. To achieve this purpose, this utility model adopts the following technical solutions:

[0004] A first aspect of the present invention provides a liquid cooling plate, characterized in that the liquid cooling plate has a front surface and a back surface relative to each other, and is provided with a hollow area. The liquid cooling plate is provided with a concave area at two opposite ends of the hollow area, and the concave area has a first surface and a second surface relative to each other. The liquid cooling plate is provided with a planar area at the other end or both ends relative to the hollow area, and the planar area has a third surface and a fourth surface relative to each other. With the front surface as a reference plane, the height of the first surface is lower than the third surface, and the height of the second surface is lower than the fourth surface. The liquid cooling plate is provided with a circulation cavity, and the circulation cavity is used to circulate liquid. The flow channel of the planar area is connected to the flow channel of the concave area.

[0005] The second aspect of the present invention provides a battery pack, characterized in that it includes: the above-mentioned liquid cooling plate, a sealing cover, a battery module, a tray, and a bottom plate, the tray is provided with a crossbeam, the liquid cooling plate is arranged between the battery module and the bottom plate, the battery module and the liquid cooling plate are installed in the tray, and the sealing cover is connected to the tray and opposite to the bottom plate.

[0006] Furthermore, in the battery pack, the crossbeam is provided with an extension support mechanism, and the extension support mechanism is used to support the battery module.

[0007] Furthermore, the extension support mechanism is a support plate.

[0008] Furthermore, both ends of the beam abut against the first surface.

[0009] Optionally, the liquid cooling plate and the base plate are connected by bonding or welding.

[0010] An electrical device comprises the liquid cooling plate and / or the battery pack described above.

[0011] The utility model provides a liquid cooling plate, which solves the problem that a battery pack with a beam and a beam extension mechanism is not conducive to direct contact between a conventional liquid cooling plate and a battery and cannot ensure smooth flow of the flow channel by providing a concave area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0013] Figure 1 This is a schematic diagram of the front of the liquid cooling plate;

[0014] Figure 2 It is the top view and cross-sectional view of the liquid cooling plate;

[0015] Figure 3 It is a schematic diagram of the battery pack;

[0016] Figure 4 This is a diagram of a pallet.

[0017] In the picture:

[0018] 1. Sealing cover; 2. Battery module; 3. Tray; 31. Crossbeam; 32. Extension support plate; 4. Liquid cooling plate; 41. Concave area; 411. First surface; 412. Second surface; 42. Flat area; 421. Third surface; 422. Fourth surface; 5. Bottom plate. DETAILED DESCRIPTION

[0019] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described. The present invention is further described in detail below in conjunction with the accompanying drawings and examples. It will be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0020] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0021] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "up", "down", "right", etc., and the like, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or semiconductor referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In addition, the terms "first", "second", "third", and "fourth" are only used to distinguish in description and have no special meanings.

[0024] In order to solve the problem that the battery pack with the crossbeam 31 and the crossbeam extension mechanism is not conducive to direct contact between the conventional liquid cooling plate 4 and the battery and cannot ensure the smooth flow of the flow channel, this embodiment provides a liquid cooling plate 4.

[0025] like Figure 1 As shown, the liquid cooling plate 4 has a front and back surface facing each other, and is provided with one or more hollow areas. Concave areas 41 are provided at opposite ends of the hollow areas, each having a first surface 411 and a second surface 412. A flat area 42 is provided at the other end or ends of the hollow areas, each having a third surface 421 and a fourth surface 422. With the front surface as a reference plane, the first surface 411 is lower than the third surface 421, and the second surface 412 is lower than the fourth surface 422. The liquid cooling plate 4 is provided with a flow channel for circulating liquid, and the flow channel of the flat area 42 is connected to the flow channel of the concave area 41. As can be seen from the top view of the liquid cooling plate 4, the concave area 41 and the flat areas 42 on both sides form a concave liquid cooling plate 4 structure, and the flow channels of the flat areas 42 on both sides are connected through the flow channels of the concave area 41.

[0026] like Figure 2 As shown, the battery pack includes a liquid cooling plate 4, a sealing cover 1, a battery module 2, a tray, and a base plate 5. The tray is provided with a crossbeam 31. The liquid cooling plate 4 is arranged between the battery module 2 and the base plate 5. The battery module 2 and the liquid cooling plate 4 are installed in the tray. The sealing cover is connected to the tray and is opposite to the base plate 5.

[0027] like Figure 3 The crossbeam is provided with an extension support mechanism, which is used to support the battery module 2. The extension support mechanism in the figure is a support plate. At this time, most of the weight of the battery cells in the battery pack is borne by the support plate.

[0028] The two ends of the crossbeam 31 abut against the concave area 41 of the liquid cooling plate 4, and the hollow area is opposite to the crossbeam 31. Most of the weight of the battery cells in the battery pack is borne by the extension support plate 32. The liquid cooling plate 4 is connected to the bottom plate 5 by bonding or welding. Because the extension support plate 32 has already borne most of the weight of the battery module 2, the battery pack structure is mainly subjected to stress by the internal crossbeam 31 and the extension support plate 32 structure under vibration / impact conditions. Since the structural strength of the extension support plate 32 is much greater than the welding of the liquid cooling plate 4 and its heat-affected zone, the risk of fracture and leakage of the liquid cooling plate 4 is avoided during the vibration / impact process. At the same time, due to the structural design of the concave area 41 of the liquid cooling plate 4, the flow channel of the liquid cooling plate 4 can be guaranteed to be unobstructed after assembly with the crossbeam 31 and the extension support mechanism.

[0029] Based on the above embodiments, the embodiments of the present application further provide an electrical device, including a device body, on which at least one liquid cooling plate 4 in the above embodiments is provided, or at least one battery pack in the above embodiments is provided.

[0030] Among them, electrical equipment includes but is not limited to: electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.

[0031] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A liquid cooling plate, characterized in that: The liquid cooling plate has a front side and a back side opposite to each other, and the liquid cooling plate is provided with a hollow area. The liquid cooling plate is provided with concave areas at opposite ends of the hollow area, and the concave areas have a first surface and a second surface opposite to each other. The liquid cooling plate is provided with a planar area at the other end or both ends opposite to the hollow area, and the planar area has a third surface and a fourth surface opposite to each other. Taking the front surface as a reference plane, the height of the first surface is lower than that of the third surface, and the height of the second surface is lower than that of the fourth surface. The liquid cooling plate is provided with a flow channel for circulating liquid, and the flow channel in the planar area is connected to the flow channel in the concave area.

2. A battery pack, characterized in that: Including the liquid cooling plate according to claim 1, the battery pack also includes a sealing cover, a battery module, a tray, and a bottom plate, the tray is provided with a crossbeam, the liquid cooling plate is arranged between the battery module and the bottom plate, the battery module and the liquid cooling plate are installed in the tray, and the sealing cover is connected to the tray and is opposite to the bottom plate.

3. The battery pack according to claim 2, wherein: The crossbeam is provided with an extension support mechanism, and the extension support mechanism is used to support the battery module.

4. The battery pack according to claim 3, wherein: The extension support mechanism is a support plate.

5. The battery pack according to claim 2, wherein: Both ends of the beam abut against the first surface.

6. The battery pack according to claim 2, characterized in that: The liquid cooling plate and the base plate are connected by bonding or welding.

7. An electrical device, comprising the liquid cooling plate according to claim 1 and / or the battery pack according to any one of claims 2 to 6.

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