Battery module and vehicle

Abstract

The utility model provides a battery module and a vehicle, the battery module comprises a shell, a plurality of battery cells, a liquid cooling component and a spraying component, the shell is provided with an installation cavity, the plurality of battery cells are installed in the installation cavity, the liquid cooling component comprises a liquid cooling plate installed in the installation cavity, the liquid cooling plate is attached to the plurality of battery cells, the interior of the liquid cooling plate is used for containing cooling liquid, and the spraying component is arranged in the shell. The interior of the liquid cooling plate is isolated from the mounting cavity, the spraying assembly is mounted in the shell and comprises a first liquid storage tank and a spraying part communicated with the first liquid storage tank, the first liquid storage tank is used for storing insulating heat exchange liquid, and the spraying part is arranged corresponding to the mounting cavity and is used for spraying the insulating heat exchange liquid in the first liquid storage tank to the battery cells; the liquid cooling assembly and the spraying assembly can independently cool the battery cells at the same time, and the cooling effect on the multiple battery cells is further improved. The cooling liquid is mainly responsible for direct contact with the battery cell for heat dissipation, and the insulating heat exchange liquid is sprayed through the insulating heat exchange liquid stored in the first liquid storage tank, so that the cooling effect of the spraying assembly on the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a battery module and a vehicle. Background Art

[0002] In order to improve the heat dissipation efficiency of a battery module, in the related art, the heat dissipation system of the battery module generally includes a liquid cooling plate and a spraying component. The liquid cooling plate is attached to the battery cells, and the spraying component sprays the battery cells. Since the spraying component is in circular communication with the liquid cooling plate, the coolant in the liquid cooling plate can not only exchange heat with the battery cells, but also supply liquid to the spraying component. However, since the liquid cooling plate is always in contact with the battery cells, the temperature of the coolant in the liquid cooling plate is relatively high, and spraying the battery cells with the coolant at a relatively high temperature results in poor cooling effect of the spraying component on the battery cells. Summary of the Utility Model

[0003] An embodiment of the utility model provides a battery module and a vehicle, which can improve the technical problem that in the prior art, due to the circular communication between the spraying component and the liquid cooling plate, the cooling effect of the spraying component on the battery cells is poor.

[0004] In a first aspect, an embodiment of the utility model provides a battery module.

[0005] In one embodiment, the battery module includes:

[0006] A housing having an installation cavity;

[0007] A plurality of battery cells installed in the installation cavity;

[0008] A liquid cooling component including a liquid cooling plate, the liquid cooling plate is installed in the installation cavity, the liquid cooling plate is attached to a plurality of the battery cells, and the inside of the liquid cooling plate is used for arranging a coolant, wherein the inside of the liquid cooling plate is isolated from the installation cavity; and,

[0009] A spraying component installed on the housing, including a first liquid storage tank and a spraying part communicated with the first liquid storage tank, the first liquid storage tank is used for storing an insulating heat exchange liquid, and the spraying part is arranged corresponding to the installation cavity and is used for spraying the insulating heat exchange liquid in the first liquid storage tank onto a plurality of the battery cells.

[0010] In one embodiment, the spraying component further includes a return pipeline and a return oil pump. The first end of the return pipeline is communicated with the first liquid storage tank, the second end of the return pipeline is communicated with the installation cavity, and the return oil pump is arranged on the return pipeline to enable the insulating heat exchange liquid in the installation cavity to flow back to the first liquid storage tank.

[0011] In one embodiment, along the direction from the first end to the second end, the diameter of the second end of the return pipeline is incrementally arranged.

[0012] In one embodiment, the spraying part includes a spraying pipeline and at least one spray head which are connected. The spraying pipeline has a spraying inlet and at least one spraying outlet. The spraying inlet is communicated with the first liquid storage tank. At least one of the spraying outlets corresponds to and is communicated with at least one of the spray heads one by one. The spraying orifice of the spray head is arranged facing the top of the battery cell; and / or,

[0013] The liquid cooling plate is in contact with the bottoms of a plurality of the battery cells.

[0014] In one embodiment, the spraying part further includes an output pump, and the output pump is arranged on the spraying pipeline.

[0015] In one embodiment, the spray head extends along the arrangement direction of a plurality of the battery cells; or,

[0016] A plurality of the spray heads are provided, and the plurality of spray heads are arranged at intervals along the arrangement direction of the plurality of battery cells.

[0017] In one embodiment, the liquid cooling plate has a liquid inlet and a liquid outlet;

[0018] The liquid cooling assembly further includes a second liquid storage tank, a first conveying pipeline, a second conveying pipeline and a cooling component. The second liquid storage tank and the cooling component are both installed on the housing. The second liquid storage tank is used for storing the coolant. One end of the first conveying pipeline and one end of the second conveying pipeline are respectively communicated with the second liquid storage tank. The other end of the first conveying pipeline is communicated with the liquid inlet, and the other end of the second conveying pipeline is communicated with the liquid outlet. The cooling component is used for cooling the coolant.

[0019] In one embodiment, the second liquid storage tank is in contact with the first liquid storage tank.

[0020] In one embodiment, it further includes a liquid level detector. The liquid level detector is installed on the housing, and the liquid level detector is used for detecting the liquid level of the insulating heat exchange liquid in the installation cavity.

[0021] In a second aspect, an embodiment of the present invention provides a vehicle, and the vehicle includes the battery module as described above. The battery module includes:

[0022] A housing having an installation cavity;

[0023] A plurality of battery cells installed in the installation cavity;

[0024] Liquid cooling assembly, including a liquid cooling plate, the liquid cooling plate is installed in the installation cavity, the liquid cooling plate is in contact with a plurality of the battery cells, and the inside of the liquid cooling plate is used to arrange a coolant, wherein the inside of the liquid cooling plate is isolated from the installation cavity; and,

[0025] Spraying assembly, installed on the housing, includes a first liquid storage tank and a spraying part communicated with the first liquid storage tank, the first liquid storage tank is used to store an insulating heat exchange liquid, the spraying part is arranged corresponding to the installation cavity and is used to spray the insulating heat exchange liquid in the first liquid storage tank onto a plurality of the battery cells.

[0026] Advantageous effects of the embodiments of the present utility model:

[0027] In the embodiments of the present utility model, through the close contact between the liquid cooling plate and a plurality of battery cells, the coolant in the liquid cooling plate can quickly take away the heat generated by the plurality of battery cells, reducing the temperature of the battery module. In addition, the spraying part sprays the insulating heat exchange liquid stored in the first liquid storage tank onto the surfaces of a plurality of battery cells, and through the direct contact between the insulating heat exchange liquid and the plurality of battery cells, more efficient heat exchange is realized, improving the cooling effect of the spraying assembly on the battery cells. The combination of the liquid cooling assembly and the spraying assembly ensures that the battery module can still maintain a lower temperature during high-load operation. Using the insulating heat exchange liquid ensures the safety of the battery cells during the spraying process, avoiding the short-circuit risk caused by the conductivity of the liquid. The inside of the liquid cooling plate is isolated from the installation cavity, realizing that the coolant of the liquid cooling assembly and the insulating heat exchange liquid of the spraying assembly are isolated. The coolant and the insulating heat exchange liquid can independently cool the battery cells at the same time, further improving the cooling effect on a plurality of battery cells. The insulating heat exchange liquid and the coolant each undertake different heat dissipation tasks, and the isolated setting ensures the independence of their respective functions, avoiding mutual performance interference. The coolant is mainly responsible for direct contact heat dissipation with the battery cells, while the insulating heat exchange liquid exchanges heat with the battery cells by spraying. The isolated setting ensures that the two liquids can dissipate heat more comprehensively for each surface of the battery cells, thus maintaining the overall heat dissipation efficiency of the battery module. In addition, since the insulating heat exchange liquid and the coolant are isolated, when one of the liquids has a problem, it can be detected and repaired separately, without having to deal with the two liquids at the same time, thus simplifying the maintenance process. The isolated setting enables the insulating heat exchange liquid and the coolant to be independently designed according to different heat dissipation requirements, improving the flexibility of the system design. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 is a schematic structural view of the battery module provided by the embodiment of the present utility model;

[0030] Figure 2 is a three-dimensional schematic view of the battery module provided by the embodiment of the present utility model;

[0031] Figure 3 is Figure 2 a three-dimensional schematic view of the battery module shown (at an angle);

[0032] Figure 4 is Figure 2 a three-dimensional schematic view of the battery module shown (at another angle);

[0033] Figure 5 is Figure 4 a partially enlarged schematic view of the position A shown;

[0034] Explanation of the reference numerals in the drawings:

[0035] 100, battery module;

[0036] 1, housing;

[0037] 2, battery cell;

[0038] 31, liquid cooling plate, 311, liquid inlet, 312, liquid outlet, 32, second liquid storage tank, 33, first pipeline, 34, second pipeline, 35, cooling component;

[0039] 41, first liquid storage tank, 42, spraying part, 421, spraying pipeline, 422, spraying head, 423, output pump, 43, return pipeline, 431, return pipe section, 432, gradually expanding cylinder, 44, return oil pump. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0041] In order to improve the heat dissipation efficiency of the battery module, in the related art, the heat dissipation system of the battery module generally includes a liquid cooling plate and a spraying component. The liquid cooling plate is attached to the battery cells, and the spraying component sprays the battery cells. However, the spraying component is in circular communication with the liquid cooling plate, so that the cooling liquid in the liquid cooling plate can not only exchange heat with the battery cells, but also supply liquid to the spraying component. However, since the liquid cooling plate is always in contact with the battery cells, the temperature of the cooling liquid in the liquid cooling plate is relatively high. Spraying the battery cells with the cooling liquid at a relatively high temperature results in a poor cooling effect of the spraying component on the battery cells.

[0042] In view of this, the present utility model provides a battery module. Figures 1 to 5 FIG. is a schematic structural diagram of an embodiment of the battery module provided by the present utility model. The battery module provided by the present utility model can improve the cooling effect of the spraying component on the battery cells. The battery module will be described in detail below with reference to the main drawings.

[0043] Referring to Figures 1 to 3 , the battery module 100 includes a housing 1, a plurality of battery cells 2, a liquid cooling component and a spraying component. The housing 1 has an installation cavity, and the plurality of battery cells 2 are installed in the installation cavity. The liquid cooling component includes a liquid cooling plate 31 and a cooling liquid. The liquid cooling plate 31 is installed in the installation cavity, and the liquid cooling plate 31 is provided with the cooling liquid inside. The liquid cooling plate 31 is in contact with the plurality of battery cells 2, and the inside of the liquid cooling plate 31 is used to arrange the cooling liquid. Wherein, the inside of the liquid cooling plate 31 is isolated from the installation cavity. The spraying component is installed on the housing 1 and includes a first liquid storage tank 41 and a spraying part 42 communicated with the first liquid storage tank 41. The first liquid storage tank 41 is used to store an insulating heat exchange liquid, and the spraying part 42 is arranged corresponding to the installation cavity and is used to spray the insulating heat exchange liquid in the first liquid storage tank 41 onto the plurality of battery cells 2.

[0044] In an embodiment of the present utility model, through the close contact between the liquid cooling plate 31 and the plurality of battery cells 2, the coolant in the liquid cooling plate 31 can quickly take away the heat generated by the plurality of battery cells 2, reducing the temperature of the battery module 100. Additionally, the spraying portion 42 sprays the insulating heat exchange liquid stored in the first liquid storage tank onto the surfaces of the plurality of battery cells 2. Through the direct contact between the insulating heat exchange liquid and the plurality of battery cells 2, more efficient heat exchange is achieved, improving the cooling effect of the spraying assembly on the battery cells. The combination of the liquid cooling assembly and the spraying assembly ensures that the battery module 100 can still maintain a relatively low temperature during high-load operation. Using the insulating heat exchange liquid ensures the safety of the battery cells 2 during the spraying process, avoiding the short-circuit risk caused by the conductivity of the liquid. The interior of the liquid cooling plate 31 is isolated from the installation cavity, enabling the coolant of the liquid cooling assembly and the insulating heat exchange liquid of the spraying assembly to be isolated. The coolant and the insulating heat exchange liquid can simultaneously and independently cool the battery cells 2 respectively, further improving the cooling effect on the plurality of battery cells 2. The insulating heat exchange liquid and the coolant each undertake different heat dissipation tasks, and the isolated setting ensures the independence of their respective functions, avoiding performance interference between them. The coolant is mainly responsible for direct contact heat dissipation with the battery cells 2, while the insulating heat exchange liquid exchanges heat with the battery cells 2 through spraying. The isolated setting ensures that the two liquids can dissipate heat more comprehensively for each surface of the battery cells 2, thereby maintaining the overall heat dissipation efficiency of the battery module 100. Additionally, since the insulating heat exchange liquid and the coolant are isolated, when one of the liquids has a problem, it can be detected and repaired separately, without the need to handle both liquids simultaneously, thus simplifying the maintenance process. The isolated setting enables the insulating heat exchange liquid and the coolant to be independently designed according to different heat dissipation requirements, improving the flexibility of the system design.

[0045] It should be noted that the coolant and the insulating heat exchange liquid can be the same or different. Specifically, the present application does not limit this.

[0046] Refer to Figures 1 to 3, in one embodiment, the spraying assembly further includes a return pipeline 43 and a return oil pump 44. The first end of the return pipeline 43 is communicated with the first liquid storage tank 41, and the second end of the return pipeline 43 is communicated with the installation cavity. The return oil pump 44 is arranged on the return pipeline 43 to enable the insulating heat exchange liquid in the installation cavity to flow back to the first liquid storage tank 41. In this way, the insulating heat exchange liquid can be recycled in the system, improving the utilization rate of resources. The arrangement of the return pipeline 43 and the return oil pump 44 ensures the continuous supply of the insulating heat exchange liquid in the installation cavity. The spraying part 42 can continuously output the insulating heat exchange liquid to spray and cool the battery cells 2, keeping the battery module 100 at an appropriate temperature, which helps to maintain the continuous and stable operation of the battery module 100. During the spraying process, the insulating heat exchange liquid exchanges heat with the battery cells 2, absorbs the heat generated by the battery cells 2, and then returns to the first liquid storage tank 41 through the return pipeline 43. In the first liquid storage tank 41, the insulating heat exchange liquid can be cooled or otherwise have its temperature reduced, and then be sprayed onto the battery cells 2 again through the spraying part 42. Such a cyclic process helps to keep the insulating heat exchange liquid in a low-temperature state and improve the heat dissipation efficiency of the battery module 100. The arrangement of the return pipeline 43 and the return oil pump 44 can ensure that the insulating heat exchange liquid in the installation cavity does not accumulate excessively, reducing the safety risks caused by liquid leakage or spillage.

[0047] Referring to Figures 1 to 3 , in one embodiment, along the direction from the first end to the second end, the diameter of the second end of the return pipeline 43 is arranged to increase. In this way, the second end of the return pipeline 43 has a larger flow area. This is beneficial for the return oil pump 44 to more efficiently pump the insulating heat exchange liquid in the installation cavity back to the first liquid storage tank 41. The larger diameter reduces the flow resistance of the insulating heat exchange liquid in the return pipeline 43 and improves the return efficiency of the insulating heat exchange liquid. According to the principle of fluid dynamics, the increasing arrangement of the diameter can reduce the change in the flow velocity of the liquid in the pipeline, thereby reducing the flow loss caused by the change in flow velocity, enabling the insulating heat exchange liquid to flow smoothly back to the first liquid storage tank 41. The larger diameter can reduce the fluid pressure loss in the return pipeline 43, especially during the return process of the insulating heat exchange liquid, which helps to maintain the pressure stability in the installation cavity and avoid adverse effects on the battery module 100 caused by pressure fluctuations.

[0048] It should be noted that there are various types of insulating heat transfer fluids. For example, the insulating heat transfer fluid may include fluorinated liquids, silicone oils, and synthetic esters. Specifically, since a closed space is formed inside the installation cavity, the air flow inside the installation cavity may cause changes in temperature and humidity, thereby increasing the risk of condensation. In the embodiment of the present application, the insulating heat transfer fluid includes silicone oil. Thus, when the silicone oil is atomized and sprayed by the spraying part 42, the atomized silicone oil will fill the volume inside the installation cavity, reducing the air flow inside the installation cavity, thereby reducing the risk of condensation. In addition, the silicone oil self-levels at the bottom of the housing 1, filling the existing voids. The multiple battery cells 2 are immersed in the silicone oil, reducing the inconsistency of the temperature difference between the multiple battery cells 2. And when the battery cell 2 undergoes thermal runaway, the silicone oil has the fire-fighting properties of isolating oxygen and suppressing combustion, improving the safety of the battery module 100.

[0049] Of course, in other embodiments, the specific type of the insulating heat transfer fluid can be selected as needed, and the present application does not limit this.

[0050] In addition, there are various ways to achieve the increasing diameter setting of the second end of the return pipeline 43 along the direction from the first end to the second end. For example, in one embodiment, it can be integrally formed so that the diameter of the other end of the return pipeline is gradually enlarged. In other embodiments, the return pipeline 43 includes a return pipe section 431 and a gradually expanding cylinder 432 communicating with the return pipe section 431. The diameter of the gradually expanding cylinder 432 increases along the direction from the first end to the second end, and the gradually expanding cylinder 432 is detachably connected to the return pipe section 431. Specifically, the present application does not limit the way of the increasing diameter setting of the second end of the return pipeline 43.

[0051] Referring to Figure 1 , in one embodiment, the spraying part 42 includes a spraying pipeline 421 and at least one spraying head 422 connected to each other. The spraying pipeline 421 has a spraying inlet and at least one spraying outlet. The spraying inlet is communicated with the first liquid storage tank 41, and at least one spraying outlet corresponds to and is communicated with at least one spraying head 422 one by one. The spraying orifice of the spraying head 422 is arranged facing the top of the battery cell 2. Thus, the insulating coolant in the first liquid storage tank 41 is conveyed to at least one spraying head 422 through the spraying pipeline 421. Since the spraying orifice of at least one spraying head 422 is arranged facing the top of the battery cell 2, it can ensure that the insulating heat transfer fluid is directly sprayed onto the top of the battery cell 2 and gradually covers the entire surface of the battery cell, achieving precise coverage. This design can ensure uniform heat transfer on the surface of the battery cell 2 and improve the heat dissipation efficiency. The insulating heat transfer fluid is directly sprayed onto the surface of the battery cell 2 through at least one spraying head 422, capable of quickly absorbing the heat generated by the battery cell 2. The spraying pipeline 421 is directly communicated with the first liquid storage tank 41, which can ensure the continuous supply of the insulating heat transfer fluid during the spraying process. At the same time, the design of the spraying head 422 can precisely control the spraying amount, avoiding waste of the insulating heat transfer fluid.

[0052] It should be noted that, referring to Figure 1 , in one embodiment, one spray head 422 is provided. Referring to Figures 2 to 4 , in another embodiment, multiple spray heads 422 are provided. Additionally, the specific number of spray heads 422 can be set as needed, and the present application does not limit this. Additionally, referring to Figure 1 , in one embodiment, the spray head 422 is disposed above the top of the battery cell 2 and the spray opening of the spray head 422 is arranged to face the top of the battery cell 2. Referring to Figures 2 to 3 , in another embodiment, the spray head 422 is disposed on the side of the battery cell 2 and the spray opening of the spray head 422 is arranged to face the top of the battery cell 2. Specifically, the specific position of the spray head 422 can be selected as needed, and the present application does not limit this.

[0053] Referring to Figure 1 , Figure 4 and Figure 5 , in one embodiment, the liquid cooling plate 31 is in contact with the bottoms of multiple battery cells 2. In this way, when the liquid cooling plate 31 is in contact with the bottoms of the battery cells 2, the heat generated by the battery cells 2 can be directly and quickly transferred to the coolant in the liquid cooling plate 31. This direct contact method greatly reduces the resistance of heat conduction and improves the heat dissipation efficiency. The contact design enables the liquid cooling plate 31 to evenly cover the bottoms of the battery cells 2, ensuring a more uniform temperature distribution on the surface of the battery cells 2. By closely contacting the liquid cooling plate 31 with the bottoms of the battery cells 2, the overall structural stability of the battery module 100 system is enhanced. This design can reduce the displacement of the battery cells 2 under vibration or impact, improving the reliability and safety of the battery module 100 system. The contact design makes full use of the space between the liquid cooling plate 31 and the battery cells 2, helping to reduce the overall volume of the battery module 100 system.

[0054] It should be noted that, in other embodiments, the liquid cooling plate 31 can also be in contact with the sides of multiple battery cells 2. In another embodiment, multiple liquid cooling plates 31 can also be provided, and the multiple liquid cooling plates 31 can be respectively in contact with the sides and bottoms of the multiple battery cells 2. Specifically, the present application does not limit this. Additionally, when the sides and bottoms of the multiple battery cells 2 are both in contact with the liquid cooling plate 31, the heat dissipation effect of the multiple battery cells 2 is the best.

[0055] Specifically, there are various ways to fix the multiple battery cells 2 to the liquid cooling plate 31. For example, in one embodiment, the multiple battery cells 2 and the liquid cooling plate 31 can be fixed by welding. In another embodiment, the multiple battery cells 2 and the liquid cooling plate 31 can also be adhered by thermal conductive glue. In other embodiments, the multiple battery cells 2 and the liquid cooling plate 31 can also be fixed by a threaded structure or a snap structure, etc. The present application does not limit the way to fix the multiple battery cells 2 to the liquid cooling plate 31.

[0056] Referring to Figures 1 to 3 , in the embodiment of the present application, the spraying part 42 includes a spraying pipeline 421 and at least one spraying head 422. The spraying pipeline 421 has a spraying inlet and at least one spraying outlet. The spraying inlet is communicated with the first liquid storage tank 41, and at least one spraying outlet is in one-to-one correspondence and communicated with at least one spraying head 422. The spraying orifice of the spraying head 422 is arranged facing the top of the battery cell 2. The liquid cooling plate 31 is attached to the bottoms of a plurality of battery cells 2. In this way, the spraying part 42 directly sprays the insulating heat exchange liquid onto the top of the battery cell 2 through the spraying head 422 and gradually covers the entire surface of the battery cell, capable of rapidly reducing the temperature of the surface of the battery cell 2. At the same time, the liquid cooling plate 31 is attached to the bottoms of the battery cells 2, ensuring that the heat at the bottoms of the battery cells 2 can also be taken away by the cooling liquid in time. This heat dissipation method combining top spraying and bottom liquid cooling realizes "360°" dead-angle-free cooling for a plurality of battery cells, making the heat dissipation of the battery cell 2 more comprehensive and efficient. The design of the spraying head 422 enables the insulating heat exchange liquid to uniformly cover the top of the battery cell 2, and the attachment of the liquid cooling plate 31 to the bottoms of the battery cells 2 ensures the uniform dissipation of the heat at the bottoms. This design helps to maintain the uniformity of the temperature on the surface of the battery cell 2 and avoid performance attenuation and safety hazards caused by uneven temperature distribution. The spraying part 42 and the liquid cooling plate 31 are used as independent heat dissipation modules, which can be conveniently inspected and maintained. By combining top spraying and bottom liquid cooling, the battery module 100 can maintain stable performance under harsh conditions such as high temperature and high load. This design improves the reliability and safety of the battery module 100 and extends the service life of the battery module 100.

[0057] Referring to Figure 1 , in one embodiment, the spraying part 42 further includes an output pump 423. The output pump 423 is arranged on the spraying pipeline 421. In this way, the output pump 423 can ensure that the insulating heat exchange liquid is conveyed to the spraying head 422 with sufficient pressure and flow rate, thereby realizing efficient spraying. The output pump 423 is a special centrifugal pump, which makes the spraying effect of the spraying head 422 very good and can ensure that the insulating heat exchange liquid is evenly and quickly sprayed onto a plurality of battery cells 2.

[0058] Referring to Figure 1, in one embodiment, the spray head 422 extends along the arrangement direction of the plurality of battery cells 2. In this way, the spray head 422 extending along the arrangement direction of the plurality of battery cells 2 can evenly spray the insulating heat exchange liquid onto the surfaces of the plurality of battery cells 2, thereby increasing the heat dissipation surface area. A larger heat dissipation surface area means that more heat can be quickly taken away, thereby improving the heat dissipation efficiency of the battery module 100. The spray head 422 extending along the arrangement direction of the plurality of battery cells 2 can ensure that the direction of the insulating heat exchange liquid ejected from the spray head 422 is more uniform. This uniform spraying method means that each part of the battery cell 2 can obtain a similar cooling effect, avoiding poor heat dissipation of some battery cells 2 caused by uneven spraying.

[0059] Referring to Figures 2 to 4 , a plurality of spray heads 422 are provided, and the plurality of spray heads 422 are arranged at intervals along the arrangement direction of the plurality of battery cells 2. In this way, setting a plurality of spray heads 422 and arranging the plurality of spray heads 422 at intervals can expand the spraying range of the insulating heat exchange liquid, enabling more battery cells 2 to be sprayed within a short time, thereby improving the heat dissipation efficiency of the plurality of battery cells 2.

[0060] It should be noted that in the embodiments of the present application, spraying includes evenly spraying the insulating heat exchange liquid in the form of mist, droplets or film onto the battery cell 2 through a specific spraying device (such as a nozzle). Of course, in other embodiments, spraying may also include spraying the insulating heat exchange liquid in the form of a water column onto the battery cell 2 through a spraying device. Specifically, the present application does not limit this.

[0061] Referring to Figure 1 , in one embodiment, the liquid cooling plate 31 has an inlet 311 and an outlet 312. The liquid cooling assembly further includes a second liquid storage tank 32, a first delivery pipeline 33, a second delivery pipeline 34 and a temperature reduction assembly 35. The second liquid storage tank 32 and the temperature reduction assembly 35 are both installed on the housing 1. The second liquid storage tank 32 is used for storing the coolant. One end of the first delivery pipeline 33 and one end of the second delivery pipeline 34 are respectively connected to the second liquid storage tank 32 in communication. The other end of the first delivery pipeline 33 is connected to the inlet 311 in communication, and the other end of the second delivery pipeline 34 is connected to the outlet 312 in communication. In this way, the coolant is circulated between the liquid cooling plate 31 and the second liquid storage tank 32 through the first delivery pipeline 33 and the second delivery pipeline 34, realizing the recycling of the coolant and reducing the waste of resources. The second liquid storage tank 32 continuously stores the coolant, ensuring that the liquid cooling assembly can continuously and stably provide a cooling effect and will not affect the heat dissipation performance due to insufficient coolant. The presence of the temperature reduction assembly 35 ensures that the coolant output from the first delivery pipeline 33 can always be maintained at a lower temperature, guaranteeing the persistence of the heat dissipation effect. The coolant circulates in a closed system, avoiding direct contact with the external environment and reducing potential safety hazards caused by leakage or pollution.

[0062] It should be noted that there are various types of the temperature reduction component 35. For example, the temperature reduction component 35 may include at least one of a cooling fan, a heat exchanger, a refrigeration system, and a thermoelectric cooler. The cooling fan takes away the heat of the coolant by generating an air flow, thereby reducing the temperature of the coolant. The rotation speed of the cooling fan can be adjusted according to the temperature of the coolant to achieve more precise heat dissipation control. The heat exchanger is an efficient heat dissipation device that achieves temperature reduction through the heat exchange between the coolant and a cooling medium (such as water or air). According to the different cooling media, the heat exchanger can be divided into types such as water-cooled and air-cooled. The water-cooled heat exchanger usually uses circulating water as the cooling medium and takes away heat through the flow of water, having advantages such as good heat dissipation effect and low noise. The refrigeration system generally includes components such as a compressor, a condenser, an expansion valve, and an evaporator, and achieves temperature reduction through the circulation of a refrigerant. The refrigerant absorbs heat in the evaporator and then discharges the heat through the compressor and the condenser, thereby reducing the temperature of the coolant. The thermoelectric cooler utilizes the thermoelectric effect of semiconductor materials to achieve refrigeration, having advantages such as small volume and compact structure. The thermoelectric cooler can be directly in contact with the liquid cooling plate 31 or the second liquid storage tank 32 and achieve temperature reduction by absorbing heat. Specifically, the type of the temperature reduction component 35 can be selected according to needs, and the present application does not limit this.

[0063] Referring to Figure 1 , in an embodiment, the second liquid storage tank 32 is in contact with the first liquid storage tank 41. In this way, the contact design can greatly reduce the occupied space of the second liquid storage tank 32 and the first liquid storage tank 41 in the battery module 100. This design can make full use of the limited space and improve the overall space utilization rate. When the second liquid storage tank 32 and the first liquid storage tank 41 are in contact, the heat conduction efficiency between them will increase. For example, if the temperature of the liquid in one of the second liquid storage tank 32 and the first liquid storage tank 41 is lower, it can transfer the cold quantity to the other one of the second liquid storage tank 32 and the first liquid storage tank 41 through heat conduction, reducing the temperature of the liquid in the other one, and it can realize that the liquid cooling component and the spraying component share the temperature reduction component 35. This shared design can reduce the hardware cost, simplify the system structure at the same time, and improve the overall reliability. When the second liquid storage tank 32 is in contact with the first liquid storage tank 41, the heat conduction path between them is greatly shortened. This means that the low-temperature coolant in one liquid storage tank can quickly transfer the cold quantity to the high-temperature coolant in the other liquid storage tank.

[0064] In one embodiment, the battery module 100 further includes a liquid level detector which is installed in the housing 1. The liquid level detector is used to detect the liquid level of the insulating heat transfer liquid in the installation cavity. When the liquid level of the insulating heat transfer liquid in the installation cavity is higher than the preset liquid level, the oil return pump 44 operates to cause at least part of the insulating heat transfer liquid in the installation cavity to flow back to the first liquid storage tank 41. In this way, the liquid level detector can monitor the liquid level of the insulating heat transfer liquid in the installation cavity in real time. This real-time monitoring can ensure that during the operation of the battery module 100, the liquid level of the insulating heat transfer liquid always remains within a safe and effective range. When the liquid level of the insulating heat transfer liquid in the installation cavity is higher than the preset liquid level, the liquid level detector will trigger the oil return pump 44 to operate. By ensuring that the liquid level of the insulating heat transfer liquid is within an appropriate range, the temperature control inside the battery module 100 can be more accurate and effective. This helps to reduce the damage to the battery module 100 caused by overheating or overcooling, thereby extending the service life of the battery module 100. The coordinated operation of the liquid level detector and the oil return pump 44 can ensure the efficiency of the insulating heat transfer liquid circulating inside the battery module 100. This helps to reduce unnecessary energy waste and improve the energy use efficiency of the battery module 100.

[0065] An embodiment of the present invention also provides a vehicle which includes the battery module 100 as described above. For the specific structure of the battery module 100, reference can be made to the above embodiment. Since this vehicle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0066] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A battery module, characterized in that: include: A housing having a mounting cavity; A plurality of battery cells are installed in the installation cavity; A liquid cooling assembly, comprising a liquid cooling plate, the liquid cooling plate being installed in the installation cavity, the liquid cooling plate being in contact with the plurality of battery cells, and the interior of the liquid cooling plate being used to set a cooling liquid, wherein the interior of the liquid cooling plate is isolated from the installation cavity; and A spray assembly is installed on the shell, including a first liquid storage tank and a spray part connected to the first liquid storage tank, the first liquid storage tank is used to store insulating heat exchange liquid, and the spray part is arranged corresponding to the installation cavity and is used to spray the insulating heat exchange liquid in the first liquid storage tank to the multiple battery cells.

2. The battery module according to claim 1, characterized in that: The spray assembly also includes a return pipeline and an oil return pump. The first end of the return pipeline is connected to the first liquid storage tank, and the second end of the return pipeline is connected to the installation cavity. The oil return pump is arranged on the return pipeline to allow the insulating heat exchange liquid in the installation cavity to flow back to the first liquid storage tank.

3. The battery module according to claim 2, characterized in that: Along the direction from the first end to the second end, the diameter of the second end of the return pipeline is set to increase gradually.

4. The battery module according to claim 1, characterized in that: The spray part comprises a spray pipeline and at least one spray head connected to each other, the spray pipeline has a spray inlet and at least one spray outlet, the spray inlet is connected to the first liquid storage tank, at least one spray outlet corresponds to and is connected to at least one spray head, and the spray port of the spray head is arranged toward the top of the battery cell; and / or, The liquid cooling plate is attached to the bottoms of the plurality of battery cells.

5. The battery module according to claim 4, characterized in that: The spray part also includes an output pump, and the output pump is arranged in the spray pipeline.

6. The battery module according to claim 4, characterized in that: The shower head is extended along the arrangement direction of the plurality of battery cells; or, A plurality of the shower heads are provided, and the plurality of the shower heads are arranged at intervals along the arrangement direction of the plurality of the battery cells.

7. The battery module according to any one of claims 1 to 6, characterized in that: The liquid cooling plate has a liquid inlet and a liquid outlet; The liquid cooling component also includes a second liquid storage tank, a first delivery pipeline, a second delivery pipeline and a cooling component. The second liquid storage tank and the cooling component are both installed on the shell. The second liquid storage tank is used to store the coolant. One end of the first delivery pipeline and one end of the second delivery pipeline are respectively connected to the second liquid storage tank, the other end of the first delivery pipeline is connected to the liquid inlet, and the other end of the second delivery pipeline is connected to the liquid outlet. The cooling component is used to cool the coolant.

8. The battery module according to claim 7, characterized in that: The second liquid storage tank is in contact with the first liquid storage tank.

9. The battery module according to any one of claims 2 to 6, characterized in that: It also includes a liquid level detector, which is installed on the shell and is used to detect the liquid level of the insulating heat exchange liquid in the installation cavity.

10. A vehicle, characterized in that: Comprising the battery module according to any one of claims 1 to 9.

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