Battery cooling plate and energy storage device

Abstract

The utility model belongs to the technical field of energy storage equipment, and relates to a battery cooling plate and an energy storage device.The battery cooling plate is arranged on one side of an anti-explosion valve of a battery module and comprises a plate body, an upset thinning part and a limiting assembly; the upsetting thinning parts are arranged at the positions, corresponding to the anti-explosion valve, of one side of the plate body, the thickness of the upsetting thinning parts is smaller than that of the inner wall of the plate body, a containing cavity is formed in the plate body, and the limiting assemblies are arranged at the positions, corresponding to the positions between the adjacent upsetting thinning parts, in the containing cavity. The limiting assembly is arranged in the containing cavity and divides the containing cavity into a plurality of liquid storage cavities corresponding to the upsetting thinning parts, cooling liquid is stored in the liquid storage cavities, one end of the limiting assembly is connected with the upsetting thinning parts, and an included angle which is an obtuse angle is further formed between the limiting assembly and the upsetting thinning parts. According to the application, different anti-explosion valves on the battery module can be effectively cooled.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and more specifically, to a battery cooling plate and an energy storage device. Background Art

[0002] A battery module is a device that is powered by several battery cells connected in series or in parallel. When the battery cells are working, high-temperature air pressure will gradually be generated inside, resulting in thermal runaway. At this time, if the high temperature inside the battery module cannot be effectively dissipated, the battery module will be damaged or even exploded. Therefore, it is necessary to set an explosion-proof valve on the battery module to effectively dissipate the high temperature generated inside the battery module.

[0003] The explosion-proof valve of the battery module is usually set on one side of the battery. When thermal runaway occurs inside the battery cell, the internal air pressure will break through the explosion-proof valve to release the pressure, thereby discharging the high-temperature gas. However, when the high-temperature gas is discharged, due to the close arrangement of the battery cells, the high-temperature gas will form heat transfer and affect the adjacent battery cells. In this way, the temperature will not only fail to decrease, but also the temperature will be too high due to the instantaneous transfer, causing the battery to burn out or explode.

[0004] In order to prevent the above situation from happening, the battery module needs to be cooled so that the temperature can be effectively reduced when thermal runaway occurs. The explosion-proof valve of the general battery module will be set at the bottom. The explosion-proof valve can be effectively cooled by setting a water-cooled plate that fits the battery module at the bottom. The water-cooled plate is provided with a through hole corresponding to the explosion-proof valve, and a thin wall with weakened treatment is provided in the through hole. When the explosion-proof valve discharges high-temperature gas, it will directly break through the thin wall on the through hole, so that the coolant inside the water-cooled plate contacts the explosion-proof valve to cool it. However, when the above-mentioned water-cooled plate is cooled, since the coolant inside the water-cooled plate cannot be discharged, the temperature of the internal coolant will continue to rise, thereby reducing the cooling effect of the subsequent different explosion-proof valves, and it is impossible to achieve continuous and effective cooling, which has a certain impact on the use of the battery module. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the present application is how to effectively cool down the different explosion-proof valves on the battery module.

[0006] In order to solve the above technical problems, the present application embodiment provides a battery cooling plate, which adopts the following technical solution:

[0007] A battery cooling plate, which is arranged on one side of an explosion-proof valve of a battery module, comprises: a plate body, an upset portion and a limiting component;

[0008] The upset portion is arranged at a position corresponding to the explosion-proof valve on one side of the plate body, the thickness of the upset portion is less than the thickness of the inner wall of the plate body, a accommodating cavity is formed inside the plate body, the limiting component is arranged at a position corresponding to between adjacent upset portions in the accommodating cavity, and the accommodating cavity is divided into a plurality of liquid storage cavities corresponding to the upset portions, coolant is stored in the liquid storage cavity, one end of the limiting component is connected to the upset portion, and an obtuse angle is formed between the limiting component and the upset portion.

[0009] Furthermore, the limiting assembly includes an isolation plate and a connecting portion, wherein the isolation plate is disposed between adjacent upset portions in the accommodating cavity, one end of the connecting portion is connected to the isolation plate, and the other end of the connecting portion is connected to the upset portion.

[0010] Furthermore, the connecting portion has a guiding bevel and a connecting plane, the connecting plane is arranged parallel to the inner wall of the plate body, one end of the guiding bevel is connected to the connecting plane, and the other end of the guiding bevel is connected to the upset portion.

[0011] Furthermore, the guide slope is formed by extending obliquely from the connecting plane toward the upset portion, and an inclination angle between the guide slope and the upset portion is an obtuse angle.

[0012] Furthermore, the connecting plane is connected to the isolation plate and the side wall of the plate body respectively, and a guiding notch is formed at the connection between the guiding inclined surface and the connecting plane.

[0013] Furthermore, the shape of the guide slot corresponds to the shape of the upset portion, and the size of the guide slot corresponds to the size of the upset portion in proportional relationship.

[0014] Furthermore, the connecting portion is connected to the inner wall of the plate body, and the inner wall has a connecting surface connected to the guide slope and the upset portion, and the connecting surface is formed by the guide slope extending obliquely toward the upset portion, and the inclination angle of the connecting surface is the same as that of the guide slope.

[0015] Furthermore, the isolation plate is arranged perpendicular to the inner wall of the plate body.

[0016] Furthermore, the thickness of the upset portion decreases uniformly from the edge to the center.

[0017] In order to solve the above technical problems, the embodiment of the present application further provides an energy storage device, comprising a battery module and the battery cooling plate as described above, wherein the battery cooling plate is arranged on one side of the explosion-proof valve of the battery module. .

[0018] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0019] In this embodiment, a battery cooling plate including a plate body, an upset portion and a limiting assembly is provided. An upset portion corresponding to the explosion-proof valve is provided at a position corresponding to the explosion-proof valve on one side of the plate body, and a limiting assembly connected to the upset portion is provided on one side of the accommodating cavity inside the plate body. An isolation plate is provided between adjacent upset portions in the accommodating cavity, thereby dividing the accommodating cavity into a plurality of liquid storage cavities, and coolant is stored in the liquid storage cavity at the same time. When the explosion-proof valve thermally runs away and ejects high-temperature gas, the high-temperature gas will break through the upset portion on the plate body, so that the coolant in the liquid storage cavity will be sprayed onto the explosion-proof valve through the guidance of the limiting assembly, thereby effectively cooling down different explosion-proof valves and preventing different explosion-proof valves from being affected during cooling down. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the battery cooling plate of the present application along the center line of the upset thin portion;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the battery cooling plate of this application;

[0023] Figure 3 This is a schematic diagram of the positional relationship between the guide groove and the upset portion of the battery cooling plate of the present application;

[0024] Reference numerals: plate body 1 , upset portion 2 , limiting assembly 3 , accommodating chamber 4 , inner wall 11 , isolation plate 31 , connecting portion 32 , guide slot 33 , liquid storage chamber 41 , connecting surface 111 , guide slope 321 , connecting plane 322 . DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein 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 and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0026] 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 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.

[0027] Embodiments of the battery cooling plate of the present application

[0028] refer to Figure 1 and Figure 2 The battery cooling plate of the present application is arranged on one side of the explosion-proof valve of the battery module, and comprises: a plate body 1, an upset portion 2 and a limiting component 3;

[0029] The upset portion 2 is arranged at a position corresponding to the explosion-proof valve on one side of the plate body 1, the thickness of the upset portion 2 is less than the thickness of the inner wall 11 of the plate body 1, and a accommodating cavity 4 is formed inside the plate body 1. The limiting component 3 is arranged at a position corresponding to between adjacent upset portions 2 in the accommodating cavity 4, and the accommodating cavity 4 is divided into a plurality of liquid storage cavities 41 corresponding to the upset portions 2, and coolant is stored in the liquid storage cavity 41. One end of the limiting component 3 is connected to the upset portion 2, and there is also an obtuse angle between the limiting component 3 and the upset portion 2.

[0030] In this embodiment, the battery cooling plate is arranged on the top of the explosion-proof valve, close to the explosion-proof valve, and the upset portion 2 is arranged along the length direction of the plate body. The length direction of the plate body 1 corresponds to the length direction of the battery module. The upset portion 2 on the plate body 1 and the explosion-proof valve on the battery module are in a one-to-one correspondence. The position and number of the upset portion 2 correspond to the position and number of the explosion-proof valve. A certain amount of coolant is stored in each liquid storage cavity 41, and the explosion-proof valve is cooled and cooled by the coolant. In this embodiment, the coolant can also be replaced by water.

[0031] In this embodiment, an upset portion 2 corresponding to the explosion-proof valve and liquid storage chambers 2 corresponding to the upset portion 2 are arranged at a position corresponding to the explosion-proof valve on one side of the plate body 1. When the explosion-proof valve ejects high-temperature gas due to thermal runaway, the high-temperature gas will break through the upset portion 2 on the plate body 1, so that the coolant in the liquid storage chamber 121 located at the top of the upset portion 2 is sprayed onto the explosion-proof valve through the guidance of the limiting component 3, thereby effectively cooling down different explosion-proof valves and preventing different explosion-proof valves from being affected during cooling down.

[0032] In an alternative embodiment of this embodiment, refer to Figure 1-Figure 2The limiting assembly 3 includes an isolation plate 31 and a connecting portion 32. The isolation plate 31 is arranged between adjacent upset portions 2 in the accommodating cavity 4. One end of the connecting portion 32 is connected to the isolation plate 31, and the other end of the connecting portion 32 is connected to the upset portion 2.

[0033] In this embodiment, the upset portions 2 are arranged at equal intervals along the length direction of the plate body at the bottom of the plate body 1, the isolation plate 31 is arranged between two adjacent upset portions 2, and the connecting portion 32 connects the isolation plate 31 and the upset portion 2 respectively, and is used to guide the coolant between the isolation plate 31 and the upset portion 2 to the upset portion 2 when the upset portion 2 is opened by the explosion-proof valve. In this embodiment, by arranging the limiting component 3 including the isolation plate 31 and the connecting portion 32 in the accommodating cavity 4, the coolant of different upset portions 2 can be effectively separated, and the separated coolant can be effectively guided so that the coolant can converge into the upset portion 2, so as to effectively cool down the explosion-proof valve at the bottom.

[0034] In another optional embodiment of the present embodiment, the connecting portion 32 has a guiding bevel 321 and a connecting plane 322, the connecting plane 322 is arranged parallel to the inner wall 11 of the plate body 1, one end of the guiding bevel 321 is connected to the connecting plane 322, and the other end of the guiding bevel 321 is connected to the upset portion 2.

[0035] In this embodiment, the connecting plane 322 is a horizontal plane parallel to the inner wall 11 of the plate body 1, and a groove structure extending obliquely to the upset portion 2 is provided on the connecting plane 322 to form a guide slope 321 between the connecting plane 322 and the upset portion 2. In this embodiment, the overall structure formed by the guide slope 321 is funnel-shaped. In this embodiment, by providing the guide slope 321 and the connecting plane 322, the coolant in the liquid storage chamber 41 is effectively guided to the upset portion 2, so as to accurately cool the explosion-proof valve outside the upset portion 2.

[0036] In another optional embodiment of the present embodiment, the guide slope 321 is formed by the connecting plane 322 extending obliquely toward the upset portion 2, and the inclination angle between the guide slope 321 and the upset portion 2 is an obtuse angle.

[0037] In this embodiment, the inclination angle formed between the guide slope 321 and the upset portion 2 is 120-145 degrees, the inclination angle in the length direction of the plate body 1 is 145 degrees, and the inclination angle in the width direction of the plate body 1 is 120 degrees, which can be adjusted according to actual conditions. In this embodiment, by setting the guide slope 321 with an obtuse inclination angle on the connecting plane 322, the cooling liquid is effectively guided to the upset portion 2 through the inclined structure, so as to ensure that the cooling liquid in the liquid storage cavity 41 can be effectively discharged through the upset portion 2.

[0038] In another optional embodiment of the present embodiment, the connecting plane 322 is connected to the isolation plate 31 and the side wall of the plate body 1 respectively, and a guiding notch 33 is formed at the connection between the guiding inclined surface 321 and the connecting plane 322 (see Figure 3 ).

[0039] In this embodiment, the side walls of the plate body 1 refer to the plate walls located on both sides of the width direction of the plate body 1, and the isolation plate 3 can be set to be perpendicular to the side walls. Figure 1-Figure 3 The guide slope 321 is the inner wall of the structure that is concave toward the bottom on the connecting portion 32, and the guide notch 33 is the edge structure where the concave toward the bottom begins to appear on the connecting plane 322. In this embodiment, by setting the connecting plane 322 to be connected to the isolation plate 31 and the side wall of the plate body 1, a liquid storage chamber 41 for storing coolant can be formed between the connecting portion 32, the side wall of the plate body 1 and the isolation plate 31, thereby preventing the coolant in the accommodating chamber 4 from being consumed all at once during cooling, and effectively improving the reliability of the device. By forming the guide notch 33 at the connection between the guide slope 321 and the connecting plane 322, the coolant on the top of the connecting plane 322 is effectively guided into the guide slope 321, and finally flows out through the upset thin portion 2 at the bottom of the guide slope 321.

[0040] In another alternative embodiment of this embodiment, refer to Figure 3 The shape of the guide slot 33 corresponds to the shape of the upset portion 2 , and the size of the guide slot 33 is proportional to the size of the upset portion 2 .

[0041] In this embodiment, the size of the upset portion 2 corresponds to the size of the explosion-proof valve, and the size of the guide slot 33 is set to be larger than the size of the upset portion 2. For example, the size of the guide slot 33 is set to be 1.5 times the size of the upset portion 2. The size ratio between the guide slot 33 and the upset portion 2 can be adjusted according to actual conditions. In this embodiment, by setting the size of the guide slot 33 to be proportional to the upset portion 2, the coolant in all directions can flow evenly to the upset portion 2 on the guide slope 321, so as to improve the practicality of the device.

[0042] In another alternative embodiment of this embodiment, refer to Figure 1 The connecting portion 32 is connected to the inner wall 11 of the plate body 1, and the inner wall 11 has a connecting surface 111 connected to the guide inclined surface 321 and the upset portion 2. The connecting surface 111 is formed by the guide inclined surface 321 extending obliquely toward the upset portion 2, and the inclination angle of the connecting surface 111 is the same as that of the guide inclined surface 321.

[0043] In this embodiment, the connection portion 32 can be formed integrally with the inner wall 11 of the plate body 1, or can be installed on the inner wall 11 of the plate body 1 by a connection and fixing method. The connection surface 111 is the guide slope 321 between the guide slope 321 and the upset portion 2, and the connection surface 111 and the guide slope 321 and the upset portion 2 are seamlessly connected. In this embodiment, by providing the connection surface 111 connecting the guide slope 321 and the upset portion 2 on the inner wall 11, the coolant flowing down from the guide slope 321 is effectively guided to the upset portion 2, thereby avoiding the coolant flowing therethrough being blocked due to the different thicknesses of the inner wall 11 and the upset portion 2.

[0044] In another optional embodiment of the present embodiment, the isolation plate 31 is arranged perpendicular to the inner wall 11 of the plate body 1 .

[0045] In this embodiment, the isolation plate 31 is arranged perpendicularly to the inner wall 11 of the plate body 1, thereby effectively making the volume and size of each liquid storage cavity uniform, so as to facilitate the storage of a fixed amount of coolant in each liquid storage cavity.

[0046] In another optional embodiment of the present embodiment, the thickness of the upset portion 2 decreases uniformly from the edge to the center.

[0047] In this embodiment, upsetting is a process for changing the thickness and shape of a plate-like structure. The upsetting portion 2 of this embodiment is a plate-like body made by the upsetting process and having a thickness less than the inner wall 11. The upsetting portion 2 can be formed integrally with the inner wall 11, or can be connected to the inner wall 11 by a connection and fixation method. In this example, the thickness of the upsetting portion 2 changes uniformly from its edge to its center, that is, when the edge of the upsetting portion 2 approaches a certain distance to the center, its thickness changes to a certain extent. Since the upsetting portion 2 has a certain shape, a certain thickness variation range can be set in the length direction and the width direction during specific implementation, so that the thickness at the center of the upsetting portion 2 is the thinnest. In this embodiment, by setting the thickness of the upsetting portion 2 to a plate-like body less than the thickness of the inner wall 11, the high-temperature gas generated in the explosion-proof valve can effectively break through the restriction of the upsetting portion 2 on the plate body 1 when ejecting, so that the coolant can flow out of the upsetting portion 2, thereby cooling the explosion-proof valve. At the same time, by setting the upset portion 2 to have a structure with varying thickness, the high-temperature gas always starts to break through the upset portion 2 from its center and slowly diffuses to its edge, so that the coolant can be concentrated at the same position when spraying from the upset portion 2, thereby improving the cooling effectiveness.

[0048] An embodiment of the present application further provides an energy storage device, comprising a battery module and the battery cooling plate as described above, wherein the battery cooling plate is arranged on one side of the explosion-proof valve of the battery module.

[0049] This embodiment can effectively cool down different explosion-proof valves on the battery module by using the energy storage device of the battery cooling plate as described above.

[0050] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A battery cooling plate, the battery cooling plate is arranged on one side of the explosion-proof valve of the battery module, characterized in that: The battery cooling plate comprises: a plate body (1), an upset portion (2) and a limiting component (3); The upset thin portion (2) is arranged at a position corresponding to the explosion-proof valve on one side of the plate body (1); the thickness of the upset thin portion (2) is less than the thickness of the inner wall (11) of the plate body (1); a receiving cavity (4) is formed inside the plate body (1); the limiting component (3) is arranged at a position corresponding to between adjacent upset thin portions (2) in the receiving cavity (4), and divides the receiving cavity (4) into a plurality of liquid storage cavities (41) corresponding to the upset thin portions (2); the liquid storage cavities (41) store cooling liquid; one end of the limiting component (3) is connected to the upset thin portion (2); and an obtuse angle is formed between the limiting component (3) and the upset thin portion (2).

2. The battery cooling plate according to claim 1, characterized in that: The limiting assembly (3) comprises an isolation plate (31) and a connecting portion (32); the isolation plate (31) is arranged between adjacent upset portions (2) in the accommodating cavity (4); one end of the connecting portion (32) is connected to the isolation plate (31), and the other end of the connecting portion (32) is connected to the upset portion (2).

3. The battery cooling plate according to claim 2, characterized in that: The connecting portion (32) comprises a guiding inclined surface (321) and a connecting plane (322), wherein the connecting plane (322) is arranged parallel to the inner wall (11) of the plate body (1), one end of the guiding inclined surface (321) is connected to the connecting plane (322), and the other end of the guiding inclined surface (321) is connected to the upset portion (2).

4. The battery cooling plate according to claim 3, characterized in that: The guiding inclined surface (321) is formed by extending obliquely from the connecting plane (322) toward the upset portion (2), and the inclination angle between the guiding inclined surface (321) and the upset portion (2) is an obtuse angle.

5. The battery cooling plate according to claim 4, characterized in that: The connecting plane (322) is respectively connected to the isolation plate (31) and the side wall of the plate body (1), and a guiding notch (33) is formed at the connection between the guiding inclined surface (321) and the connecting plane (322).

6. The battery cooling plate according to claim 5, characterized in that: The shape of the guide slot (33) corresponds to the shape of the upset portion (2), and the size of the guide slot (33) and the size of the upset portion (2) are in proportional correspondence.

7. The battery cooling plate according to claim 3, characterized in that: The connecting portion (32) is connected to the inner wall of the plate body (1), and the inner wall has a connecting surface (111) connected to the guiding inclined surface (321) and the upset portion (2), and the connecting surface (111) is formed by extending obliquely from the guiding inclined surface (321) toward the upset portion (2), and the connecting surface (111) and the guiding inclined surface (321) have the same inclination angle.

8. The battery cooling plate according to claim 2, characterized in that: The isolation plate (31) is arranged perpendicular to the inner wall of the plate body (1).

9. The battery cooling plate according to any one of claims 1 to 8, characterized in that: The thickness of the upset portion (2) decreases uniformly from the edge to the center.

10. An energy storage device, characterized in that: The invention comprises a battery module and a battery cooling plate as claimed in any one of claims 1 to 9, wherein the battery cooling plate is arranged on one side of an explosion-proof valve of the battery module.

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