Battery cooling structure and battery module

Abstract

The utility model relates to a battery cooling structure and a battery module, and relates to the technical field of power batteries. The battery cooling structure comprises a cooling box. The cooling box comprises a bottom plate, a side plate and an upper cover plate, a containing cavity is defined by the bottom plate, the side plate and the upper cover plate jointly, and the containing cavity is used for containing a battery cell. Wherein a cooling flow channel is formed in the bottom plate and / or the side plate, the cooling flow channel communicates with the containing cavity through at least one flow guide hole, and a control valve is arranged in the flow guide hole. The battery cooling structure provided by the utility model can solve the problems of non-uniform heat dissipation, low cooling efficiency and the like during heat dissipation and cooling of the power battery in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery cooling structure and a battery module. BACKGROUND

[0002] In recent years, the application field of power batteries represented by lithium batteries is continuously expanding. At the same time, due to the characteristics of power batteries, a certain amount of heat will be generated during charging and discharging. Therefore, a cooling structure needs to be set up accordingly when in use.

[0003] In the prior art, the cooling methods used by power batteries mainly include air cooling and liquid cooling plate cooling. Among them, air cooling has low cost but poor cooling efficiency, while liquid cooling plate cooling has stronger cooling effect than air cooling, but the surface of the power battery adhered to the liquid cooling plate has stronger heat dissipation effect than other surfaces, that is, there is a problem of uneven heat dissipation when the liquid cooling plate is cooled.

[0004] Therefore, it is urgent to provide a power battery cooling structure that can solve the problems of uneven heat dissipation and low cooling efficiency of power batteries in the prior art. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to provide a battery cooling structure and a battery module, which can solve the problems of uneven heat dissipation and low cooling efficiency of power batteries in the prior art.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a battery cooling structure, which comprises a cooling box. The cooling box comprises a bottom plate, a side plate and an upper cover plate, and the bottom plate, the side plate and the upper cover plate jointly enclose a containing cavity for containing battery cells. A cooling flow channel is formed in the bottom plate and / or the side plate, and the cooling flow channel is communicated with the containing cavity through at least one flow guide hole, and a control valve is arranged in the flow guide hole.

[0007] Based on the above-mentioned embodiments of the present application, the battery cell is arranged in the accommodating cavity. When the cooling flow channel is arranged in the bottom plate and the side plate for circulating the cooling liquid, the bottom plate and the side plate form a liquid cooling plate structure, and the battery cell is cooled by the liquid cooling plate. When the battery cell is applied to high-power output working conditions and other factors cause the battery cell to generate more heat, the cooling liquid can be directly injected into the accommodating cavity by opening the control valve, thereby achieving immersion cooling of the battery cell. Compared with the liquid cooling plate cooling method, the immersion cooling method has higher heat exchange efficiency, and the cooling liquid can simultaneously contact the battery cell from multiple surfaces, thereby achieving more uniform heat dissipation and improving the heat dissipation efficiency. In summary, the above-mentioned arrangement of the present application can realize the switching of the battery cell cooling method from the liquid cooling plate cooling to the immersion cooling. In specific use, the cooling method can be switched according to the requirement of improving the heat dissipation, thereby meeting the different heat dissipation requirements of the battery cell to improve the safety and service life of the battery cell in use while saving costs.

[0008] In some embodiments, the cooling flow channel is arranged in the bottom plate, the first water inlet and the first water outlet are arranged on the bottom plate, the cooling flow channel is in communication with the first water inlet and the first water outlet at both ends, the first water stop valve is arranged in the cooling flow channel, and the at least one flow guide hole is arranged between the first water inlet and the first water stop valve. Alternatively, the cooling flow channel is arranged in the side plate, the second water inlet and the second water outlet are arranged on the side plate, the cooling flow channel is in communication with the second water inlet and the second water outlet at both ends, the first water stop valve is arranged in the cooling flow channel, and the at least one flow guide hole is arranged between the second water inlet and the first water stop valve.

[0009] Based on the above-mentioned embodiments of the present application, when the cooling flow channel is only arranged in the bottom plate, the cooling liquid passes through the cooling flow channel in the conventional working state, and the bottom plate forms a liquid cooling plate. When the cooling demand of the battery cell needs to be switched to immersion cooling, the first water stop valve is closed and the control valve is opened, the cooling liquid enters the first water inlet, and then is injected into the accommodating cavity through the flow guide hole between the first water inlet and the first water stop valve, thereby achieving immersion cooling of the battery cell. In this process, the arrangement of the first water stop valve can reduce the flow distribution, thereby improving the injection efficiency of the cooling liquid into the accommodating cavity and improving the switching speed. Similarly, when the cooling flow channel is only arranged in the side plate, the side plate forms a liquid cooling plate in the conventional working state, and then the cooling liquid is injected into the accommodating cavity by closing the first water stop valve and opening the control valve to complete the switching.

[0010] In some embodiments, a portion of the cooling flow channel is formed in the bottom plate, another portion of the cooling flow channel is formed in the side plate, and the portion of the cooling flow channel in the bottom plate is in communication with the portion of the cooling flow channel in the side plate, the cooling tank is provided with a third water inlet and a third water outlet, the two ends of the cooling flow channel are in communication with the third water inlet and the third water outlet respectively, the cooling flow channel is provided with a first water stop valve, and at least one flow guide hole is arranged between the third water inlet and the first water stop valve.

[0011] Based on the above embodiments of the present application, when the bottom plate and the side plate are provided with the cooling flow channel at the same time, and the cooling flow channels in the two are in communication with each other, only the first water stop valve is arranged in the cooling flow channel as a whole including the cooling flow channel in the bottom plate and the cooling flow channel in the side plate. In the conventional cooling state, the first water stop valve is opened and the control valve is closed, and the cooling liquid flows through the bottom plate and the side plate. At this time, the bottom plate and the side plate simultaneously constitute a liquid cooling plate cooling structure to cool the battery cell. When it is necessary to improve the heat dissipation effect, the first water stop valve is closed and the control valve is opened, and the cooling liquid is injected into the containing cavity through the flow guide hole between the third water inlet and the first water stop valve to achieve immersion cooling of the battery cell.

[0012] In some embodiments, a portion of the cooling flow channel is formed in the bottom plate, another portion of the cooling flow channel is formed in the side plate, and the portion of the cooling flow channel in the bottom plate is in communication with the portion of the cooling flow channel in the side plate, the cooling tank is provided with a third water inlet and a third water outlet, the two ends of the cooling flow channel are in communication with the third water inlet and the third water outlet respectively, the cooling flow channel is provided with a first water stop valve, and at least one flow guide hole is arranged between the third water inlet and the first water stop valve.

[0013] Based on the above embodiments of the present application, the cooling flow channel in the bottom plate and the cooling flow channel in the side plate are at least partially in parallel, that is, they can flow and conduct independently of each other while being able to communicate with each other. The first water stop valve and the second water stop valve are arranged in the cooling flow channel as a whole, and the second water stop valve is arranged at the intersection position of the cooling flow channel in the bottom plate and the cooling flow channel in the side plate. In the conventional cooling state, the first water stop valve is opened, and the second water stop valve and the control valve are closed. At this time, the cooling liquid is injected into one of the bottom plate or the side plate where the fourth water inlet and the fourth water outlet are located to constitute a liquid cooling plate structure. When it is necessary to improve the heat dissipation effect, the second water stop valve is opened. At this time, the cooling liquid flows through the cooling flow channel in the bottom plate and the cooling flow channel in the side plate, and both of them constitute a liquid cooling plate structure, thereby improving the heat dissipation and cooling effect. When it is necessary to further improve the heat dissipation and cooling effect, the first water stop valve is closed and the control valve is opened, and the cooling liquid is injected into the containing cavity through the control valve to achieve immersion cooling, thereby further improving the heat dissipation and cooling effect, thereby realizing three-stage improvement and switching of the heat dissipation and cooling effect.

[0014] In some embodiments, the control valve is a pressure valve.

[0015] Based on the above-mentioned embodiments of the present application, by setting the control valve as a pressure valve, when it is needed to inject cooling liquid into the accommodating cavity, only the first water stop valve needs to be closed while the water inlet continuously injects cooling liquid, at this time, the pressure in the cooling flow channel between the water inlet and the first water stop valve increases, and the pressure valve can be automatically opened under the action of water pressure to complete the injection, without manual control, so that the control process is more simple and convenient.

[0016] In some embodiments, one end of the side plate close to the upper cover plate is provided with a flange flange, and the bottom surface of the upper cover plate is provided with a clamping groove matched with the flange flange, and the flange flange can be fitted into the clamping groove.

[0017] Based on the above-mentioned embodiments of the present application, by setting the flange flange, the contact area of the contact position of the side plate and the upper cover plate can be increased, on the one hand, the connection and fixation between the side plate and the upper cover plate can be facilitated, and on the other hand, the sealing effect of the connection position of the two can be improved.

[0018] In some embodiments, a waterproof gland is embedded on the upper cover plate for the pole of the battery cell to pass through.

[0019] Based on the above-mentioned embodiments of the present application, by setting the waterproof gland, the sealing effect of the accommodating cavity is ensured while the pole of the battery cell is connected and conducted with the outside.

[0020] According to the second aspect of the present application, a battery module is provided, which comprises a battery cell and the above-mentioned battery cooling structure, and the battery cell is arranged in the accommodating cavity.

[0021] Based on the above-mentioned embodiments of the present application, the battery module provided by the present application comprises the above-mentioned battery cooling structure, through the above-mentioned setting, the cooling and heat dissipation mode can be switched according to the different cooling requirements of the battery module, so as to improve the safety of the battery module during use and prolong the service life of the battery module.

[0022] In some embodiments, the battery module further comprises a multifunctional pipe, the multifunctional pipe is arranged in the accommodating cavity, and one end of the multifunctional pipe is connected to the position of the explosion-proof valve of the battery cell. The upper cover plate is provided with a communication hole, the upper cover plate abuts against the multifunctional pipe, and the other end of the multifunctional pipe communicates with the communication hole.

[0023] Based on the above-mentioned embodiments of the present application, by setting the multi-functional pipe to communicate the explosion-proof valve of the battery cell and the outside of the containing cavity, when the battery cell occurs thermal runaway, the high-temperature flue gas generated can be sequentially discharged to the outside of the containing cavity through the explosion-proof valve and the multi-functional pipe, avoiding the safety problem caused by the inability to discharge the high-temperature flue gas. At the same time, it can also avoid the influence of the electrolyte on the insulation effect of the cooling liquid when the battery cell thermal runaway. Further, by the abutment of the upper cover plate and the multi-functional pipe, the battery cell below can be pressed and limited to a certain extent through the multi-functional pipe, avoiding the displacement of the battery cell affecting the safety during use.

[0024] In some embodiments, the number of battery cells is multiple, each battery cell is connected with a positive pole and a negative pole, at least one positive pole and one negative pole of the multiple positive poles and the multiple negative poles are arranged on the upper cover plate, and one end is exposed outside the cooling box. The remaining positive poles and negative poles are connected and conducted through the gasket.

[0025] Based on the above-mentioned embodiments of the present application, the number of battery cells inside the battery module can be set according to actual needs, and the adjacent battery cells are connected and conducted through the gasket, so that the multiple battery cells form a series connection or a parallel connection or a mixed connection relationship. At least one positive pole and one negative pole are exposed outside the cooling box and connected with the outside to realize input and output.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0028] Figure 1 is a structural schematic diagram of the battery cooling structure provided by the embodiments of the present application.

[0029] Figure 2 is a cross-sectional schematic diagram of the bottom plate in the battery cooling structure provided by an embodiment of the present application.

[0030] Figure 3 is a cross-sectional schematic diagram of the side plate in the battery cooling structure provided by another embodiment of the present application.

[0031] Figure 4 is a cross-sectional schematic diagram of the bottom plate and the side plate in the battery cooling structure provided by a third embodiment of the present application.

[0032] Figure 5 is a cross-sectional schematic diagram of the bottom plate and the side plate in the battery cooling structure provided by a fourth embodiment of the present application. Figure 1 .

[0033] Figure 6 is a cross-sectional view of the bottom plate and the side plate in the battery cooling structure provided by the fourth embodiment of the present application Figure 2 .

[0034] Figure 7 is a cross-sectional view of the bottom plate and the side plate in the battery cooling structure provided by the fourth embodiment of the present application Figure 3 .

[0035] Figure 8 is a structural view of the battery cell and the accommodating cavity in the battery cooling structure provided by the embodiment of the present application.

[0036] Figure 9 is a bottom view of the upper cover plate in the battery cooling structure provided by the embodiment of the present application.

[0037] Figure 10 is a top view of the upper cover plate in the battery cooling structure provided by the embodiment of the present application.

[0038] Figure 11 is a structural view of the battery module provided by the embodiment of the present application.

[0039] Explanation of Reference Signs

[0040] 1, cooling box; 11, bottom plate; 12, side plate; 121, flange turnup; 13, upper cover plate; 131, clamping groove; 132, communication hole; 14, accommodating cavity; 2, cooling flow channel; 21, flow guide hole; 3, control valve; 31, first water stop valve; 32, second water stop valve; 321, water inlet water stop valve; 322, water outlet water stop valve; 41, first water inlet; 42, first water outlet; 43, second water inlet; 44, second water outlet; 45, third water inlet; 46, third water outlet; 47, fourth water inlet; 48, fourth water outlet; 5, waterproof banjo; 6, battery cell; 61, pole; 62, explosion-proof valve; 7, multifunctional tube; 8, O-ring; 9, low-voltage wire harness. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present application and are not used to limit the present application.

[0042] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present application and are not used to limit the present application.

[0043] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0044] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the application, it should be noted that, unless otherwise stated, the orientation or positional relationship indicated by the terms "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] In the description of the application, it should also be noted that, unless otherwise specified and limited, the terms "set", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] In recent years, the application field of power batteries represented by lithium batteries has been expanding, at the same time, limited by the characteristics of power batteries, a certain amount of heat will be generated in the process of charging and discharging, so a cooling structure needs to be set up accordingly when in use.

[0048] In the prior art, the cooling methods used by power batteries are mainly air cooling and liquid cooling plate cooling. Among them, air cooling has low cost but poor cooling efficiency, while liquid cooling plate cooling has stronger cooling effect than air cooling, but the surface of the power battery adhered to the liquid cooling plate has stronger heat dissipation effect than other surfaces, that is, there is a problem of uneven heat dissipation when the liquid cooling plate is cooled.

[0049] In order to solve the above problems in the prior art, according to the first aspect of the application, with reference to Figures 1 to 8As shown in the above embodiments, the battery cooling structure provided by the present application comprises a cooling box 1. The cooling box 1 comprises a bottom plate 11, a side plate 12 and an upper cover plate 13, which together enclose a containing cavity 14, and the battery cell 6 is arranged in the containing cavity 14. The bottom plate 11 and / or the side plate 12 is / are provided with a cooling flow channel 2, and the cooling flow channel 2 is in communication with the containing cavity 14 through at least one flow guide hole 21, and the flow guide hole 21 is provided with a control valve 3.

[0050] Specifically, the flow guide hole 21 is arranged between the cooling flow channel 2 and the containing cavity 14 for connecting and conducting them. In the specific processing process, the cooling flow channel 2 is usually integrally processed and formed with the bottom plate 11 or the side plate 12, and then the flow guide hole 21 can be formed by drilling a through hole in the bottom wall and the side wall of the containing cavity 14 towards the cooling flow channel 2. Meanwhile, the number of flow guide holes 21 can also be set to be multiple, and the specific setting can be equidistant along the flow direction of the cooling flow channel 2.

[0051] Further, the control valve 3 is arranged in the flow guide hole 21 for controlling the opening and closing of the flow guide hole 21, so it can be directly embedded in the flow guide hole 21 or arranged at the connecting position of the flow guide hole 21 and the cooling flow channel 2. Meanwhile, the control valve 3 should meet the requirement of controlling the opening and closing as needed when arranged, so it can be specifically selected as an electromagnetic valve, and the specific selection can be made according to the actual control requirement, which is not limited in the present application.

[0052] Based on the above embodiments of the present application, the battery cell 6 is arranged in the containing cavity 14 as a whole, and when the cooling flow channel 2 is arranged in the bottom plate 11 and the side plate 12 for circulating the cooling liquid, the bottom plate 11 and the side plate 12 form a liquid cooling plate structure, and the battery cell 6 is cooled and radiated by the liquid cooling plate cooling method. When the battery cell 6 is applied to the high-power output working condition and other factors cause the battery cell 6 to generate more heat, the control valve 3 can be opened to make the cooling liquid directly enter the containing cavity 14 through the flow guide hole 21 to soak the battery cell 6 in the containing cavity 14, so as to cool and radiate the battery cell 6 by the immersion cooling method. Compared with the liquid cooling plate cooling method, the immersion cooling method has higher heat exchange efficiency, and the cooling liquid can simultaneously contact the battery cell 6 from multiple surfaces of the battery cell 6 and the battery cell 6, so that the heat dissipation is more uniform, thereby improving the heat dissipation efficiency.

[0053] In summary, through the above arrangement of the present application, the cooling method of the battery cell 6 can be switched from the liquid cooling plate cooling to the immersion cooling, and in specific use, the cooling method can be switched according to the improvement of the heat dissipation requirement, so as to meet the different heat dissipation requirements of the battery cell 6 in the case of saving cost, thereby improving the safety and service life of the battery cell 6 in use.

[0054] In addition, it should be understood that, in order to cooperate with the immersion cooling of the battery cell 6, the cooling liquid needs to be provided with insulation effect, which can be selected according to actual needs, and the present application does not make specific limitations. For example, the cooling liquid can be set as a 50% glycol solution, or it can also be set as an electronic fluorinated liquid, etc., which utilizes the good heat conduction performance and excellent insulation performance of the above-mentioned materials, so as to realize the immersion cooling of the battery cell 6 without affecting the normal work of the battery cell 6.

[0055] Further, the bottom plate 11, the side plate 12 and the upper cover plate 13 in the present application can adopt any suitable connection mode.

[0056] In an exemplary embodiment provided by the present application, the bottom plate 11, the side plate 12 and the upper cover plate 13 can be provided separately, and when assembled, the bottom plate 11 and the side plate 12 can be fixed by welding or the like, so as to ensure the connection effect and improve the sealing property, avoiding the leakage of the cooling liquid. Further, in order to ensure the sealing effect, the connection position of the bottom plate 11 and the side plate 12 can be welded on the inner side and the outer side. The side plate 12 and the upper cover plate 13 can be connected and fixed by bolt connection or the like, so as to be maintained and disassembled later.

[0057] Alternatively, in another embodiment provided by the present application, the bottom plate 11 and the side plate 12 can be integrally processed and formed, and the bottom plate 11 and the side plate 12 are integrally processed and formed by pouring or the like, and the upper cover plate 13 can be separately processed, and then fixed with the side plate 12 by bolt connection or the like.

[0058] Reference Figures 2 to 7 As shown in FIG. 1, in the present application, the cooling flow channel 2 can be arranged in the bottom plate 11 and / or the side plate 12, that is, the cooling flow channel 2 can be arranged only in the bottom plate 11, only in the side plate 12, partially in the bottom plate 11 and partially in the side plate 12, and the specific arrangement mode can be selected at will according to needs.

[0059] Reference Figure 2 As shown in FIG. 1, in an exemplary embodiment provided by the present application, the cooling flow channel 2 can be arranged in the bottom plate 11, and the bottom plate 11 is provided with a first water inlet 41 and a first water outlet 42, and the cooling flow channel 2 is in communication with the first water inlet 41 and the first water outlet 42 at both ends, and the cooling flow channel 2 is provided with a first water stop valve 31, and at least one flow guide hole 21 is arranged between the first water inlet 41 and the first water stop valve 31.

[0060] Specifically, the first water stop valve 31 in the present application is arranged in the cooling flow channel 2 to control the opening and closing of the cooling liquid flow path in the cooling flow channel 2, so it needs to meet the requirement of remote control when arranged, and in specific use, an electromagnetic valve or the like can be selected.

[0061] Based on the above-mentioned embodiments of the present application, only the cooling flow channel 2 is opened in the bottom plate 11 at this time. In the normal working state, the first water stop valve 31 is opened, the control valve 3 is closed, the cooling liquid enters from the first water inlet 41, passes through the cooling flow channel 2, and finally flows out from the first water outlet 42. In this process, the cooling liquid cannot enter the containing cavity through the guide hole 21 along the guide hole 21, and at this time the bottom plate 11 constitutes a liquid cooling plate, which cools the battery cell 6 from the bottom.

[0062] When the cooling demand of the battery cell 6 increases and the cooling efficiency of the liquid cooling plate cannot meet the requirement, the first water stop valve 31 can be closed and the control valve 3 can be opened. At this time, the cooling liquid enters from the first water inlet 41 and cannot continue to pass through the cooling flow channel 2 after reaching the first water stop valve 31. Then, the cooling liquid accumulates in the cooling flow channel between the first water inlet 41 and the first water stop valve 31, and is injected into the containing cavity 14 through the control valve 3 between the first water inlet 41 and the first water stop valve 31 to soak the battery cell in the containing cavity, thereby realizing immersion cooling of the battery cell 6. The cooling efficiency of immersion cooling is greater than that of liquid cooling, so that the battery cell 6 can be quickly cooled to prevent the performance of the battery from being affected by temperature and to improve the safety of the battery in use.

[0063] In this process, closing the first water stop valve 31 when injecting the cooling liquid into the containing cavity 14 can reduce the diversion of the cooling liquid, thereby improving the injection efficiency of the cooling liquid into the containing cavity 14, and further improving the switching speed of the cooling mode. After the injection of the cooling liquid is completed, the first water stop valve 31 can be closed or opened.

[0064] Further, based on the above-mentioned arrangement of the present application, when the cooling liquid is injected into the containing cavity 14 through the guide hole 21, the control valve 3 needs to be opened to make the guide hole 21 completely conductive for the cooling liquid to pass through, and at the same time, the first water stop valve 31 is closed to reduce the diversion of the cooling liquid. On this basis, when the first water stop valve 31 is arranged as an electromagnetic valve, the control valve 3 can be correspondingly arranged as a pressure valve. When the first water stop valve 31 is closed during switching, the first water inlet 41 remains to inject the cooling liquid, which will cause the pressure in the cooling flow channel 2 between the first water inlet 41 and the first water stop valve 31 to increase, and thus the pressure valve in this area will be subjected to increased pressure, thereby causing the pressure valve to automatically open to inject the cooling liquid into the containing cavity 14.

[0065] Through the above arrangement, only by controlling the first stop valve 31 to adjust the pressure in the cooling flow channel 2, the opening and closing state of the control valve 3 can be adjusted, and the control valve 3 does not need to be adjusted separately, so that the control process is more simple and convenient, and at the same time, it can also avoid that the control valve 3 cannot be closed in time, resulting in that the pressure in the containing cavity 14 is too large.

[0066] Alternatively, as shown in Figure 3 In another exemplary embodiment provided by the present application, the cooling flow channel 2 can be arranged in the side plate 12, the second water inlet 43 and the second water outlet 44 are arranged on the side plate 12, the two ends of the cooling flow channel 2 are communicated with the second water inlet 43 and the second water outlet 44 respectively, the first stop valve 31 is arranged in the cooling flow channel 2, and the at least one flow guide hole 21 is arranged between the second water inlet 43 and the first stop valve 31.

[0067] Based on the above-mentioned embodiments of the present application, at this time, only the cooling flow channel 2 is arranged in the side plate 12, in the conventional cooling state, the first stop valve 31 is opened, the control valve 3 is closed, the cooling liquid is introduced into the side plate 12 through the second water inlet 43, the cooling liquid flows through the cooling flow channel 2 and then flows out from the second water outlet 44, and the side plate 12 serves as a liquid cooling plate to cool and heat the battery cell 6.

[0068] When it is necessary to improve the heat dissipation efficiency, the first stop valve 31 is closed and the control valve 3 is opened, the cooling liquid is injected into the cooling flow channel 2 through the second water inlet 43, the cooling liquid accumulates between the second water inlet 43 and the first stop valve 31 and then flows into the containing cavity 14 through the control valve 3 along the flow guide hole 21, and the battery cell 6 in the containing cavity 14 is soaked, so as to realize the immersion cooling of the battery cell 6. The cooling efficiency of the immersion cooling is greater than that of the liquid cooling plate cooling mode, so that the rapid cooling of the battery cell can be realized, the performance of the battery is prevented from being affected by the temperature, and the use safety of the battery is improved.

[0069] Alternatively, in some other embodiments of the present application, the cooling flow channel 2 can be arranged in the bottom plate 11 and the side plate 12 at the same time.

[0070] Referring to Figure 4 In a third exemplary embodiment provided by the present application, a part of the cooling flow channel 2 is arranged in the bottom plate 11, another part of the cooling flow channel 2 is arranged in the side plate 12, the part of the cooling flow channel 2 arranged in the bottom plate 11 is communicated with the part of the cooling flow channel 2 arranged in the side plate 12, the third water inlet 45 and the third water outlet 46 are arranged on the cooling tank 1, the two ends of the cooling flow channel 2 are communicated with the third water inlet 45 and the third water outlet 46 respectively, the first stop valve 31 is arranged in the cooling flow channel 2, and the at least one flow guide hole 21 is arranged between the third water inlet 45 and the first stop valve 31.

[0071] Based on the above embodiments of the present application, when the cooling flow channel 2 is arranged in the bottom plate 11 and the side plate 12 at the same time, and the cooling flow channels 2 in the two are communicated with each other, at this time, the cooling flow channel 2 including the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12 constitutes a complete cooling flow channel 2, and the first water stop valve 31 is arranged in the complete cooling flow channel 2. In the normal cooling state, the first water stop valve 31 is opened and the control valve 3 is closed, after the cooling liquid is injected into the third water inlet 45, the cooling liquid flows through the bottom plate 11 and the side plate 12 along the cooling flow channel 2, and finally flows out from the third water outlet 46, at this time, the bottom plate 11 and the side plate 12 simultaneously constitute the liquid cooling plate cooling structure to simultaneously cool the battery cell 6 from the bottom and the side. In this scheme, the area of the liquid cooling plate is large, compared with the scheme that the cooling flow channel 2 is arranged only in the bottom plate 11 or only in the side plate 12, the scheme that the cooling flow channel 2 is arranged in the bottom plate 11 and the side plate 12 at the same time and constitutes the liquid cooling plate cooling structure has relatively high cooling efficiency.

[0072] On the basis of arranging the cooling flow channel 2 in the bottom plate 11 and the side plate 12 at the same time, when it is necessary to further improve the heat dissipation effect, at this time, the first water stop valve 31 is closed and the control valve 3 is opened, at this time, after the cooling liquid is injected into the third water inlet 45, the cooling liquid cannot continue to pass after flowing to the first water stop valve 31 along the cooling flow channel 2, then the cooling liquid accumulates in the cooling flow channel 2 between the third water inlet 45 and the first water stop valve 31, and flows into the containing cavity 14 through the control valve 3 between the third water inlet 45 and the first water stop valve 31, realizing immersion cooling of the battery cell 6.

[0073] Specifically, the specific positions of the third water inlet 45 and the third water outlet 46 can be arranged according to the arrangement of the cooling flow channel 2. For example, when the cooling flow channel 2 starts from one side of the bottom plate 11 and extends into the side plate 12, and then extends from the side plate 12 to the other side of the bottom plate 11, at this time, the third water inlet 45 and the third water outlet 46 are arranged on the bottom plate 11. Alternatively, the cooling flow channel 2 starts from one side of the bottom plate 11 and is uniformly arranged in the bottom plate 11, and then extends to the side plate 12 and ends on the outer wall of the side plate 12, at this time, the third water inlet 45 is arranged on the bottom plate 11, and the third water outlet 46 is arranged on the side plate 12. Similarly, the third water inlet 45 and the third water outlet 46 can also be arranged on the side plate 12 at the same time, or the third water inlet 45 is arranged on the side plate 12 and the third water outlet 46 is arranged on the bottom plate 11.

[0074] Reference Figures 5 to 7As shown in FIG. 1, in the fourth exemplary embodiment provided in the present application, a portion of the cooling flow channel 2 is formed in the bottom plate 11, and another portion of the cooling flow channel 2 is formed in the side plate 12, at least a portion of the cooling flow channel 2 formed in the bottom plate 11 and at least a portion of the cooling flow channel 2 formed in the side plate 12 are in parallel connection, the two ends of the cooling flow channel 2 are respectively communicated with a fourth water inlet 47 and a fourth water outlet 48, the fourth water inlet 47 and the fourth water outlet 48 are simultaneously arranged in one of the bottom plate 11 and the side plate 12, the first water stop valve 31 and the second water stop valve 32 are arranged in the cooling flow channel 2, the first water stop valve 31 and the fourth water inlet 47 are arranged in the same one of the bottom plate 11 and the side plate 12, the second water stop valve 32 is arranged at the joint position of the cooling flow channel 2 formed in the bottom plate 11 and the cooling flow channel 2 formed in the side plate 12, and at least one flow guide hole 21 is arranged between the fourth water inlet 47 and the first water stop valve 31.

[0075] Based on the above-mentioned embodiments of the present application, the at least partially parallel connection of the cooling flow channel 2 formed in the bottom plate 11 and the cooling flow channel 2 formed in the side plate 12 means that at least a portion of the cooling flow channel 2 formed in the bottom plate 11 and at least a portion of the cooling flow channel 2 formed in the side plate 12 are two branches of the complete cooling flow channel 2, and the cooling liquid can flow independently in the two branches. It can be understood that the two branches have two communication positions, one of which is used for the distribution of the cooling liquid to the two parallel branches, and the other of which is used for the convergence of the cooling liquid in the two branches, and both communication positions are located at the joint of the bottom plate 11 and the side plate 12.

[0076] Specifically, referring to Figure 6 As shown in FIG. 1, when the fourth water inlet 47 and the fourth water outlet 48 are respectively formed at the two ends of the bottom plate 11, a complete cooling flow channel 2 can be formed in the bottom plate 11, the cooling flow channel 2 formed in the side plate 12 is in parallel connection with the cooling flow channel 2 formed in the bottom plate 11, and the two connection positions of the two are both provided with the second water stop valve 32, the second water stop valve 32 close to the fourth water inlet 47 is arranged as the water inlet water stop valve 321, and the second water stop valve 32 close to the fourth water outlet 48 is arranged as the water outlet water stop valve 322.

[0077] Further referring to Figure 5 As shown in FIG. 1, when the first water stop valve 31 is arranged between the fourth water inlet 47 and the water inlet water stop valve 321, the first water stop valve 31 is opened and the two second water stop valves 32 and the control valve 3 are closed in the normal cooling state, at this time the cooling liquid flows into the cooling flow channel 2 formed in the bottom plate 11 from the fourth water inlet 47, and the cooling flow channel 2 formed in the side plate 12 cannot make the cooling liquid pass through due to the closing of the second water stop valve 32, and the flow guide hole 21 cannot make the cooling liquid pass through due to the closing of the control valve 3, so only the bottom plate 11 is used as the liquid cooling plate to cool and dissipate heat for the battery cell 6.

[0078] When the cooling effect needs to be improved, the first water stop valve 31 remains open, and the two second water stop valves 32 are opened while the control valve 3 is kept closed. At this time, the cooling liquid flows into the cooling flow channel 2 in the bottom plate 11 first after being injected from the fourth water inlet 47, and then is divided at the junction position of the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12. Part of the cooling liquid continues to flow along the cooling flow channel 2 in the bottom plate 11, and the other part of the cooling liquid flows into the cooling flow channel 2 in the side plate 12 through the water inlet water stop valve 321, and then flows out from the water outlet water stop valve 322 to join the cooling liquid in the bottom plate 11, and finally flows out together from the fourth water outlet 48. At this time, the bottom plate 11 and the side plate 12 simultaneously act as liquid cooling plates to cool and dissipate heat for the battery cell 6, which improves the cooling effect compared with the setting mode in which only the bottom plate 11 acts as a liquid cooling plate.

[0079] When the cooling effect needs to be further improved, the first water stop valve 31 is closed and the control valve 3 is opened at this time, and the two second water stop valves 32 can be opened or closed, for example, both of the two second water stop valves 32 are closed. At this time, the cooling liquid accumulates in the cooling flow channel 2 between the fourth water inlet 47 and the first water stop valve 31 after being injected from the fourth water inlet 47, and then is injected into the containing cavity 14 through the flow guide hole 21 between the fourth water inlet 47 and the first water stop valve 31, realizing immersion cooling for the battery cell 6. Compared with the mode in which the bottom plate 11 and the side plate 12 simultaneously act as liquid cooling plates to cool, the immersion cooling mode has the cooling liquid directly contact the battery cell 6, so that the heat conduction efficiency is higher and the temperature is more uniform, thereby improving the cooling efficiency for the battery cell 6.

[0080] Reference Figure 6 As shown in FIG. 1, when the first water stop valve 31 is arranged in the bottom plate 11 and located between the water inlet water stop valve 321 and the water outlet water stop valve 322, in the normal cooling state, the first water stop valve 31 is opened, and the two second water stop valves 32 and the control valve 3 are closed. At this time, the cooling liquid flows along the cooling flow channel 2 in the bottom plate 11 after being injected from the fourth water inlet 47, and finally flows out from the fourth water outlet 48. At this time, only the bottom plate 11 acts as a liquid cooling plate to cool and dissipate heat for the battery cell 6.

[0081] When the cooling effect needs to be improved, the first water stop valve 31 remains open, and the two second water stop valves 32 are opened while the control valve 3 is kept closed. At this time, the cooling liquid flows into the cooling flow channel 2 in the bottom plate 11 first after being injected from the fourth water inlet 47, and then is divided at the junction position of the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12. Part of the cooling liquid continues to flow along the cooling flow channel 2 in the bottom plate 11, and the other part of the cooling liquid flows into the cooling flow channel 2 in the side plate 12 through the water inlet water stop valve 321, and then flows out from the water outlet water stop valve 322 to join the cooling liquid in the bottom plate 11, and finally flows out together from the fourth water outlet 48. At this time, the bottom plate 11 and the side plate 12 simultaneously act as liquid cooling plates to cool and dissipate heat for the battery cell 6, which improves the cooling effect compared with the setting mode in which only the bottom plate 11 acts as a liquid cooling plate.

[0082] The difference between the above-mentioned first water stop valve 31 arranged between the fourth water inlet 47 and the water inlet water stop valve 321 and the present embodiment is that when the heat dissipation and cooling effect needs to be further improved, the first water stop valve 31 is closed and the control valve 3 is opened, and at least one of the water inlet water stop valve 321 and the water outlet water stop valve 322 needs to be kept closed, for example, the water inlet water stop valve 321 is closed. After the cooling liquid flows into the cooling flow channel 2 from the fourth water inlet 47, the cooling liquid cannot flow into the cooling flow channel 2 in the side plate 12 due to the simultaneous closing of the first water stop valve 31 and the water inlet water stop valve 321, and cannot pass through the first water stop valve 31. The cooling liquid accumulates in the cooling flow channel 2 between the fourth water inlet 47 and the first water stop valve 31, and is injected into the containing cavity 14 through the flow guide hole 21 therebetween, realizing immersion cooling of the battery cell 6, thereby improving the heat dissipation and cooling effect.

[0083] Reference Figure 7 As shown in FIG. 1, when the first water stop valve 31 is arranged between the water outlet water stop valve 322 and the fourth water outlet 48, the states of the first water stop valve 31, the second water stop valve 32 and the control valve 3 at each stage and the corresponding cooling liquid flow path and cooling effect are the same as when the first water stop valve 31 is arranged between the fourth water inlet 47 and the water inlet water stop valve 321, which will not be described here.

[0084] Similarly, when the fourth water inlet 47 and the fourth water outlet 48 are arranged on the side plate 12 at the same time, the side plate 12 can be used as a liquid cooling plate for heat dissipation and cooling in the conventional cooling state, and when the heat dissipation and cooling effect needs to be improved, the second water stop valve 32 is controlled to be opened so that the cooling liquid flows into the side plate 12 and the bottom plate 11 at the same time. When the heat dissipation and cooling effect needs to be further improved, the cooling liquid is injected into the containing cavity 14 by adjusting the opening and closing states of the first water stop valve 31, the second water stop valve 32 and the control valve 3 to realize immersion cooling. For specific conditions, reference can be made to the various conditions when the fourth water inlet 47 and the fourth water outlet 48 are arranged on the bottom plate, which will not be described here.

[0085] In summary, in the conventional cooling state, the first water stop valve 31 is opened, and the second water stop valve 32 and the control valve 3 are closed, at this time the cooling liquid is injected into one of the fourth water inlet 47 and the fourth water outlet 48 in the bottom plate 11 or the side plate 12 to form a liquid cooling plate structure. When the heat dissipation effect needs to be improved, the second water stop valve 32 is opened, at this time the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12 both have cooling liquid passing through, both of which constitute a liquid cooling plate structure, thereby improving the heat dissipation and cooling effect. When the heat dissipation and cooling effect needs to be further improved, the first water stop valve 31 is closed and the control valve 3 is opened, and the cooling liquid is injected into the containing cavity 14 through the control valve 3 to realize immersion cooling, thereby further improving the heat dissipation and cooling effect, thereby realizing three-stage improvement switching of the heat dissipation and cooling effect.

[0086] In addition, it should be noted that the second water stop valve 32 is arranged at the joint position of the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12 in the above arrangement, and the second water stop valve 32 only serves to separate the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12 during use. In specific arrangement, the second water stop valve 32 needs to meet the requirement of remote control as the first water stop valve 31, and therefore can also be selected as an electromagnetic valve, and the specific selection can be made according to the control requirement.

[0087] Specifically, in some embodiments of the present application, when the cooling flow channel 2 is arranged, a plurality of sub-flow channels can be arranged between the water inlet and the water outlet, and the sub-flow channels are uniformly distributed in the bottom plate 11 or the side plate 12, so that the distribution of the cooling liquid is more uniform, thereby making the temperature more uniform when cooling and dissipating heat for the battery cell 6, and improving the cooling and heat dissipation effect.

[0088] Further, when a plurality of sub-flow channels are arranged, the first water stop valve 31 and the second water stop valve 32 should be arranged as much as possible at the confluence position of the plurality of sub-flow channels. For example, as shown in Figures 5 to 7 , when the cooling flow channel 2 in the bottom plate 11 and the cooling flow channel 2 in the side plate 12 are connected, the cooling flow channel 2 extends from the bottom plate 11 into the side plate 12, and then branches into a plurality of sub-flow channels in the side plate 12, so that the cooling liquid is uniformly distributed in the side plate 12. The two second water stop valves 32 are arranged at the confluence positions of the two ends of the plurality of sub-flow channels in the side plate 12, so that the opening and closing control of the two ends of the plurality of sub-flow channels can be realized simultaneously by the two second water stop valves 32.

[0089] It should be noted that the above is only a plurality of exemplary embodiments provided by the present application, and the present application is not limited to the above specific embodiments, and the specific use can be adaptively adjusted based on the above embodiments to meet the specific use requirements. For example, in actual use, a partition plate and the like can be added in the cooling box 1, and the cooling flow channel 2 can also be arranged in the partition plate, so as to not only increase the heat dissipation and cooling effect of the battery cell 6 in the conventional cooling state, but also enhance the strength of the battery as a whole to meet higher strength requirements.

[0090] As shown in Figure 8 and 9 , in some embodiments of the present application, the side plate 12 can be provided with a flange 121 at one end close to the upper cover plate 13, and the upper cover plate 13 can be provided with a clamping groove 131 matched with the flange 121, and the flange 121 can be fitted into the clamping groove 131.

[0091] Based on the above-mentioned embodiments of the present application, the flange turn-up 121 is arranged to increase the contact area of the contact position of the side plate 12 and the upper cover plate 13, which can facilitate the connection and fixation between the side plate 12 and the upper cover plate 13, and can also improve the sealing effect of the connection position.

[0092] Specifically, when the side plate 12 and the upper cover plate 13 are fixed by bolt connection, the arrangement of the flange turn-up 121 can increase the area of the connection position, thereby facilitating the opening of the bolt hole and the fixation of the bolt. Meanwhile, the position of the clamping groove 131 and the upper cover plate 13 can also be provided with a sealing gasket in specific use, so as to further enhance the sealing effect of the connection position of the side plate 12 and the upper cover plate 13.

[0093] Further, in some embodiments of the present application, a waterproof gland 5 can also be embedded on the upper cover plate 13. As shown in Figure 10 When the battery cell 6 is arranged in the accommodating cavity 14, the pole 61 of the battery cell 6 passes through the waterproof gland 5 and is connected to the outside of the cooling box 1, so as to realize the input and output of the battery cell 6.

[0094] On the basis of the above technical solutions, according to the second aspect of the present application, a battery module is provided, as shown in Figure 11 The battery module includes the battery cell 6 and the above-mentioned battery cooling structure, and the battery cell 6 is arranged in the accommodating cavity 14.

[0095] Based on the above-mentioned embodiments of the present application, the battery module provided by the present application includes the above-mentioned battery cooling structure. Through the above arrangement, the cooling and heat dissipation mode can be switched according to the different cooling requirements of the battery module, so as to improve the safety of the battery module in use and prolong the service life of the battery module.

[0096] As shown in Figure 11 In some embodiments of the present application, the battery module can also include a multifunctional pipe 7, which is arranged in the accommodating cavity 14 and connected to the position of the explosion-proof valve 62 of the battery cell 6 at one end. The upper cover plate 13 is provided with a communication hole 132, the upper cover plate 13 abuts against the multifunctional pipe 7, and the other end of the multifunctional pipe 7 communicates with the communication hole 132.

[0097] Based on the above-mentioned embodiments of the present application, by arranging the multifunctional pipe 7 to communicate the explosion-proof valve 62 of the battery cell 6 and the outside of the accommodating cavity 14, when the battery cell 6 occurs thermal runaway, the high-temperature flue gas generated can be sequentially discharged to the outside of the accommodating cavity 14 through the explosion-proof valve 62 and the multifunctional pipe 7, so as to avoid the safety problem caused by the inability to discharge the high-temperature flue gas. Meanwhile, it can also avoid the influence of the electrolyte on the insulation effect of the cooling liquid when the battery cell 6 occurs thermal runaway.

[0098] Meanwhile, in the prior art, when the battery cell 6 is connected with the bottom cold plate and the like structure, structural glue is usually provided to ensure the connection strength between the battery cell 6 and the cold plate. However, in the present application, due to the provision of the flow guide hole 21 and the like structure and the provision of the immersion cooling mode, the bottom plate 11 and the battery cell 6 cannot be directly connected by providing structural glue to strengthen the connection. By abutting the upper cover plate 13 and the multifunctional pipe 7, the multifunctional pipe 7 can press and position the battery cell 6 below to a certain extent, thereby improving the connection strength of the connection position of the battery cell 6 and the bottom plate 11, so as to avoid displacement of the battery cell 6 affecting the safety during use.

[0099] Further, in order to ensure the sealing effect of the connection position of the multifunctional pipe 7 and the explosion-proof valve 62 and the communication hole 132, in some embodiments of the present application, a sealing ring can also be provided at the interface position of the multifunctional pipe 7 and the explosion-proof valve 62 and the communication hole 132. The sealing ring is made of flexible material, such as silicone and the like. After the multifunctional pipe 7 and the upper cover plate 13 are assembled, the upper cover plate 13 abuts against the multifunctional pipe 7 and extrudes the sealing ring position. The sealing ring is deformed under pressure and further improves the sealing effect of the interface position.

[0100] In some embodiments of the present application, a sliding layer can also be provided on the inner wall of the side plate 12. The battery cell 6 is usually assembled from one end of the side plate 12 and the upper cover plate 13 connected to the receiving cavity 14. The provision of the sliding layer reduces the friction between the battery cell 6 and the inner wall of the side plate 12, thereby facilitating the assembly of the battery cell 6. In specific use, the sliding layer can be made of an epoxy resin layer or an epoxy resin plate and the like structure.

[0101] In addition, in the specific assembly of the battery module in the present application, a plurality of battery cells 6 can be provided in the single cooling box 1. Each battery cell 6 is connected with a pole 61, specifically including a positive pole and a negative pole. Subsequently, at least one positive pole and one negative pole are provided in the waterproof gland 5, and one end is exposed outside the cooling box 1, so as to be connected with the outside to realize input and output. The other positive poles and negative poles are connected and conducted through the gasket 8, which is arranged between the adjacent two battery cells 6 during connection.

[0102] Further, when a plurality of battery cells 6 are provided, a buffer pad can be provided between any adjacent two battery cells 6, which can be made of buffer foam and the like. By providing the buffer pad, on the one hand, it can provide a buffering effect between the adjacent battery cells 6 to avoid damage, and on the other hand, it can provide a certain pre-tightening space during assembly of the battery cell 6, and then be pre-tightened and fixed by the external side plate 12 and the like structure.

[0103] In addition, it should be noted that the battery module in the present application is not limited to the above structure, and can be set according to actual use. For example, the low-voltage wire harness 9 can also be arranged between the bar plate 8 and the multifunctional pipe 7, one end of the low-voltage wire harness 9 is directly connected to the bar plate 8, and the other end is directly connected to the outside of the cooling box 1 through the multifunctional pipe 7, for monitoring and controlling the input and output of the current inside the battery module and other working conditions during use of the battery module. At the same time, a waterproof joint can be arranged at the connection position of the low-voltage wire harness 9 and the multifunctional pipe 7 to ensure the sealing effect of the connection position of the multifunctional pipe 7.

[0104] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0105] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, various possible combinations are not described again in the present application.

[0106] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed in the present application.

Claims

1. A battery cooling structure characterized by, The battery cooling structure comprises: a cooling box comprising a bottom plate, a side plate and an upper cover plate, which collectively enclose a receiving cavity for placing an electric core; wherein a cooling flow channel is formed in the bottom plate and / or the side plate, the cooling flow channel is communicated with the receiving cavity through at least one flow guide hole, and a control valve is arranged in the flow guide hole.

2. The battery cooling structure according to claim 1, characterized by The cooling flow channel is formed in the bottom plate, a first water inlet and a first water outlet are formed in the bottom plate, the two ends of the cooling flow channel are communicated with the first water inlet and the first water outlet respectively, a first water stop valve is arranged in the cooling flow channel, and at least one flow guide hole is arranged between the first water inlet and the first water stop valve; or The cooling flow channel is formed in the side plate, a second water inlet and a second water outlet are formed in the side plate, the two ends of the cooling flow channel are communicated with the second water inlet and the second water outlet respectively, a first water stop valve is arranged in the cooling flow channel, and at least one flow guide hole is arranged between the second water inlet and the first water stop valve.

3. The battery cooling structure according to claim 1, characterized by Part of the cooling flow channel is formed in the bottom plate and part of the cooling flow channel is formed in the side plate, and the part of the cooling flow channel in the bottom plate is communicated with the part of the cooling flow channel in the side plate, a third water inlet and a third water outlet are arranged on the cooling box, the two ends of the cooling flow channel are communicated with the third water inlet and the third water outlet respectively, a first water stop valve is arranged in the cooling flow channel, and at least one flow guide hole is arranged between the third water inlet and the first water stop valve.

4. The battery cooling structure according to claim 1, characterized by Part of the cooling flow channel is formed in the bottom plate and part of the cooling flow channel is formed in the side plate, and at least part of the cooling flow channel in the bottom plate is in parallel with at least part of the cooling flow channel in the side plate, a fourth water inlet and a fourth water outlet are respectively communicated at the two ends of the cooling flow channel, the fourth water inlet and the fourth water outlet are arranged on one of the bottom plate and the side plate, a first water stop valve and a second water stop valve are arranged in the cooling flow channel, the first water stop valve and the fourth water inlet are arranged on the same one of the bottom plate and the side plate, the second water stop valve is arranged at the joint position of the cooling flow channel in the bottom plate and the cooling flow channel in the side plate, and at least one flow guide hole is arranged between the fourth water inlet and the first water stop valve.

5. The battery cooling structure according to any one of claims 2 to 4, characterized by, The control valve is a pressure valve.

6. The battery cooling structure according to claim 1, characterized by An end of the side plate close to the upper cover plate is provided with a flange flange, the bottom surface of the upper cover plate is provided with a clamping groove matched with the flange flange, and the flange flange can be fitted into the clamping groove.

7. The battery cooling structure according to claim 1, characterized by A waterproof gland is embedded in the upper cover plate for the pole of the electric core to pass through.

8. A battery module, characterized by The battery module comprises: an electric core; and The battery cooling structure according to any one of claims 1-7, wherein the electric core is arranged in the receiving cavity.

9. The battery module of claim 8, wherein, The battery module further comprises a multifunctional pipe arranged in the receiving cavity, and one end of the multifunctional pipe is connected to the position of the explosion-proof valve of the electric core. The upper cover plate is provided with a communication hole, the upper cover plate abuts against the multifunctional pipe, and the other end of the multifunctional pipe communicates with the communication hole.

10. The battery module of claim 8, wherein, The number of the electric cores is multiple, each of the electric cores is connected with a positive pole and a negative pole, at least one of the positive poles and one of the negative poles among the multiple positive poles and the multiple negative poles are arranged in the upper cover plate, and one end of the positive pole and the negative pole is exposed outside the cooling box, and the rest of the positive poles and the negative poles are connected and conducted through a bar.

Images