Battery box body, battery module, energy storage cabinet and energy storage equipment

Abstract

The utility model relates to a battery box body, a battery module, an energy storage cabinet and energy storage equipment, the battery box body is used for the battery module of the energy storage cabinet, and the battery box body comprises a battery box body and a first exhaust valve; an accommodating cavity for accommodating a battery cell is formed in the battery box body, the battery box body is provided with a protruding part and a bottom plate, and the protruding part protrudes out of the bottom plate of the battery box body in the side direction of the battery box body; the first exhaust valve is arranged on the protruding part and communicated with the containing cavity. The bottom plate of the upper battery module and the first exhaust valve of the lower battery module are arranged in a staggered manner, so that the installation height and the exhaust space of the first exhaust valve are prevented from being reserved between two adjacent battery modules in the height direction of the energy storage cabinet; therefore, the space utilization rate in the height direction of the energy storage cabinet is improved, and the energy density of the energy storage cabinet is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular, to a battery box body, a battery module, an energy storage cabinet and an energy storage device. Background Art

[0002] The function of the energy storage cabinet is to store energy. Inside the energy storage cabinet, multiple battery modules are usually arranged stacked along the height direction of the energy storage cabinet. In the related art, each battery module is separately equipped with an exhaust valve, and multiple battery modules are stacked and installed along the height direction of the energy storage cabinet, but the space utilization rate in the height direction of the energy storage cabinet is relatively low. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery box body, a battery module, an energy storage cabinet and an energy storage device to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above purpose, according to the first aspect of the present disclosure, there is provided a battery box body for a battery module of an energy storage cabinet, the battery box body including a battery box body main body and a first exhaust valve;

[0005] The battery box body main body has a receiving cavity for accommodating battery cells. The battery box body main body is provided with a protruding portion and a bottom plate, and the projection of the protruding portion along the height direction of the battery box body is at least partially located outside the contour of the projection of the bottom plate along the height direction;

[0006] The first exhaust valve is arranged on the protruding portion and is communicated with the receiving cavity.

[0007] Optionally, the battery box body main body includes a lower box body and an upper cover. The lower box body includes the bottom plate and side plates arranged on the bottom plate, and the upper cover covers the upper ends of the side plates;

[0008] The protruding portion includes a first convex portion located on the upper cover. The first convex portion is provided with an opening communicated with the receiving cavity, and the first exhaust valve is connected to the opening.

[0009] Optionally, an exhaust cavity is arranged inside the first convex portion, and the lowest position of the exhaust cavity is not lower than the highest position of the receiving cavity.

[0010] Optionally, a convex platform is arranged on the outer side of the first convex portion, and the opening is arranged on the convex platform.

[0011] Optionally, the protruding portion further includes a second convex portion located on the side plate. The second convex portion and the first convex portion are arranged corresponding to each other along the height direction of the battery module and are connected to each other.

[0012] According to a second aspect of the present disclosure, there is provided a battery module, including a battery cell and the battery box body as described above, and the battery cell is accommodated in the accommodation cavity.

[0013] Optionally, the battery cell is adapted to be immersed in the coolant of the battery box body.

[0014] According to a third aspect of the present disclosure, there is provided an energy storage cabinet, including a cabinet body and a plurality of battery modules. An accommodation space is provided in the cabinet body, the accommodation space is arranged along the height direction of the energy storage cabinet, and the battery modules are accommodated in the accommodation space.

[0015] Optionally, the energy storage cabinet further includes a pipeline structure, the pipeline structure includes a first liquid outlet pipe and a plurality of second liquid outlet pipes, one end of each second liquid outlet pipe is adapted to communicate with the inside of the corresponding battery module, and the other end of each second liquid outlet pipe communicates with the first liquid outlet pipe;

[0016] The energy storage cabinet further includes a second exhaust valve, and the second exhaust valve is arranged on the first liquid outlet pipe.

[0017] Optionally, an exhaust cavity is provided in the protruding portion, and the lowest position of the exhaust cavity is not lower than the highest position of the accommodation cavity;

[0018] The liquid inlet end of the second liquid outlet pipe is located in the exhaust cavity.

[0019] Optionally, a through hole is provided on the lower surface of the protruding portion, and the second liquid outlet pipe passes through the through hole.

[0020] Optionally, the first liquid outlet pipe extends along the height direction of the energy storage cabinet, and the second exhaust valve is arranged at the upper end of the first liquid outlet pipe.

[0021] Optionally, the pipeline structure further includes a first liquid inlet pipe and a plurality of second liquid inlet pipes;

[0022] The liquid inlet end of each second liquid inlet pipe communicates with the first liquid inlet pipe respectively, and the liquid outlet end of each second liquid inlet pipe is adapted to communicate with the inside of the corresponding battery module.

[0023] Optionally, the first liquid inlet pipe extends along the height direction of the energy storage cabinet, and the liquid inlet end of the first liquid inlet pipe is located at the upper end or the lower end of the first liquid inlet pipe.

[0024] Optionally, the first liquid inlet pipe and the first liquid outlet pipe are located on the same side of the energy storage cabinet.

[0025] Optionally, the second liquid inlet pipe and the second liquid outlet pipe are located on the same side of the energy storage cabinet, and are arranged on the same side of the energy storage cabinet as the first liquid outlet pipe.

[0026] Optionally, the liquid outlet end of the second liquid inlet pipe is located at the lower part of the battery module.

[0027] According to a fourth aspect of the present disclosure, there is provided an energy storage device including a plurality of the above-mentioned energy storage cabinets.

[0028] Through the above technical solution, it is possible to avoid reserving the installation height and exhaust space for the first exhaust valve between two adjacent battery modules in the height direction of the energy storage cabinet, which is beneficial to improving the space utilization rate in the height direction of the energy storage cabinet, and further beneficial to increasing the energy density of the energy storage cabinet.

[0029] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0031] Figure 1 FIG. 18 is a schematic perspective view of a partial structure of an energy storage cabinet provided by an embodiment of the present disclosure. The cabinet body is not shown, and a plurality of battery modules and pipeline structures are shown.

[0032] Figure 2 FIG. 22 is a schematic perspective view of a battery module provided by an embodiment of the present disclosure. Some pipeline structures are also shown.

[0033] Figure 3 FIG. 26 is a front view of a battery module provided by an embodiment of the present disclosure.

[0034] Figure 4 FIG. 30 is a cross-sectional view of a battery module provided by an embodiment of the present disclosure.

[0035] Figure 5 FIG. 34 is Figure 4 an enlarged view of part A in FIG.

[0036] DESCRIPTION OF REFERENCE NUMERALS

[0037] 200 - Energy storage cabinet, 100 - Battery module, 10 - Battery box body, 1 - Battery box body main body, 11 - Lower box body, 111 - Bottom plate, 112 - Side plate, 12 - Protrusion, 121 - First protrusion, 1211 - Boss, 1212 - Opening, 122 - Second protrusion, 123 - Exhaust cavity, 124 - Through hole, 13 - Upper cover, 14 - Accommodation cavity, 2 - First exhaust valve, 20 - Battery cell, 30 - Second exhaust valve, 40 - Pipeline structure, 41 - First liquid outlet pipe, 42 - Second liquid outlet pipe, 43 - First joint, 44 - First liquid inlet pipe, 45 - Second liquid inlet pipe, 46 - Second joint, 50 - Liquid inlet valve, 60 - Liquid outlet valve, 70 - Cooling liquid. Detailed implementation manners

[0038] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0039] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually defined according to the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present disclosure. For example, upper, lower, top, bottom can be the upper, lower, top, bottom when the energy storage cabinet is in normal use. Among them, the height direction (up and down direction) of the energy storage cabinet can be Figure 1 the height direction marked in the figure. "Inside and outside" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. used are to distinguish one element from another element, and do not have sequence and importance.

[0040] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "coupled", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] It is found that in the related art, the reason for the low space utilization rate in the height direction of the energy storage cabinet is that since each battery module is separately installed with an exhaust valve, when multiple battery modules are stacked and installed in the height direction of the energy storage cabinet, that is, when the bottom plate of the upper battery module is installed on the upper cover of the lower battery module, the installation height and exhaust space of the exhaust valve need to be left between two adjacent battery modules, resulting in a low space utilization rate in the height direction of the energy storage cabinet.

[0042] In view of this, as Figures 1 to 5 shown, the present disclosure provides a battery box body 10, a battery module 100 including the battery box body 10, and an energy storage cabinet 200 including the battery module 100. Among them, a plurality of accommodation spaces are provided in the cabinet, the plurality of accommodation spaces are arranged along the height direction of the energy storage cabinet 200, and the battery module 100 can be accommodated in the accommodation space. The battery module 100 includes a battery cell 20 and a battery box body 10, and the battery cell 20 is accommodated in the accommodation cavity 14 of the battery box body 10.

[0043] It can be understood that in the present disclosure, each accommodation space can accommodate only one battery module 100 or more than one battery module 100, and the present disclosure does not limit this.

[0044] As Figures 1 to 5 shown, the battery box body 10 provided by the present disclosure includes a battery box body main body 1 and a first exhaust valve 2. The battery box body main body 1 has an accommodation cavity 14 for accommodating the battery cell 20. The battery box body main body 1 is provided with a protruding portion 12 and a bottom plate 111. The projection of the protruding portion 12 along the height direction of the battery box body 10 is at least partially located outside the contour of the bottom plate 111 along the projection of the contour in the height direction. The first exhaust valve 2 is arranged on the protruding portion 12 and communicates with the accommodation cavity 14.

[0045] It can be understood that the projection of the battery box body 10 in the height direction (the same as the height direction of the energy storage cabinet 200) is located outside the contour of the bottom plate 111, which can make the bottom plate 111 of the adjacent battery box bodies 10 and the protruding portion 12 arranged in a staggered manner, so as to facilitate the installation of the first exhaust valve 2.

[0046] In some embodiments, the protruding portion 12 can be the same as the extension of the upper cover 13, and the protruding portion 12 can be arranged parallel to the bottom plate 111.

[0047] Through the above technical solution, since the protruding portion 12 protruding from the bottom plate 111 of the battery box body 1 is provided on the battery module 100, and the first exhaust valve 2 is installed on the protruding portion 12, when a plurality of battery modules 100 are stacked along the height direction of the energy storage cabinet 200, the bottom plate 111 of the upper battery module 100 is arranged in a staggered manner with the protruding portion 12 of the lower battery module 100, so that the bottom plate 111 of the upper battery module 100 and the first exhaust valve 2 of the lower battery module 100 are arranged in a staggered manner. Such a design is beneficial to prevent interference between the bottom plate 111 of the upper battery module 100 and the top wall (such as the upper cover 13 in the following text) of the lower battery module 100 in two adjacent battery modules 100 due to the installation of the first exhaust valve 2. They can be close to each other, and it is possible to avoid reserving the installation height and exhaust space of the first exhaust valve 2 between two adjacent battery modules 100 in the height direction of the energy storage cabinet 200. Therefore, it is beneficial to improve the space utilization rate in the height direction of the energy storage cabinet 200, and further beneficial to increase the energy density of the energy storage cabinet 200. In the present disclosure, the first exhaust valve 2 communicates with the accommodation cavity 14, so that the gas in each battery module 100 can be discharged in real time through the first exhaust valve 2. Each battery module 100 is equipped with a first exhaust valve 2, which can ensure better exhaust effect and better safety. The first exhaust valve 2 also has a pressure relief function, so that the battery box body 1 does not need to bear a large pressure, and it can be applied to the plastic battery box body 1, improving the insulation performance of the battery module 100.

[0048] The above-mentioned protruding portion 12 protrudes from the bottom plate 111 of the battery box body 1 along the side of the battery box body 1, that is, at least part of the battery box body 1 is configured with a structure that is larger at the top and smaller at the bottom. Then, the protruding portions 12 of the stacked battery modules 100 are staggered. The first exhaust valve 2 is installed on the protruding portion 12, which can prevent interference between two adjacent battery modules 100 caused by the installation of the first exhaust valve 2. Therefore, the volume limit of the first exhaust valve 2 itself can be relaxed. For example, a mechanical exhaust valve can be selected. The mechanical exhaust valve is durable and not easily corroded, and does not need to be replaced frequently, which can increase the service life of the battery module 100.

[0049] In the present disclosure, as Figure 2 and Figure 3As shown, the battery box body 1 may include a lower box body 11 and an upper cover 13 covering the lower box body 11. The lower box body 11 includes a bottom plate 111 and side plates 112 provided on the bottom plate 111, and the upper cover 13 covers the upper ends of the side plates 112; the protruding portion 12 includes a first convex portion 121 located on the upper cover 13. The first convex portion 121 is provided with an opening 1212 communicating with the accommodating cavity 14, and the first exhaust valve 2 is connected to the opening 1212. With such a setting, it can be ensured that the first exhaust valve 2 is connected to the position where the upper cover 13 protrudes from the bottom plate 111, without interference with the bottom plate 111 of the adjacent battery module 100, facilitating the installation of the first exhaust valve 2. Setting it on the upper cover 13 can also ensure that the first exhaust valve 2 is at the top in the position of the battery module 100, which is beneficial to the discharge of gas.

[0050] In the present disclosure, as Figure 5 shown, an exhaust cavity 123 may be provided inside the first convex portion 121, and the lowest position of the exhaust cavity 123 is higher than the highest position of the accommodating cavity 14. With such a setting, it is convenient to accumulate gas inside the exhaust cavity 123.

[0051] In the related art, when a coolant or other heat exchange liquid is added to the inside of the battery module, gas needs to be discharged. Then, the gas inside the battery module will float upward. When the coolant fills the entire battery module, the un-discharged gas will float between the lower surface of the upper cover and the coolant, and cannot be discharged centrally.

[0052] In the present application, an exhaust cavity 123 is provided in the first convex portion 121, and the height of the lowest position of the exhaust cavity 123 is not lower than the highest position of the accommodating cavity 14. Then, the exhaust cavity 123 is the highest position inside the entire battery module 100. Due to the principle that gas will float upward automatically, the un-discharged gas will not float irregularly on the lower surface of the entire upper cover 13, but will be concentrated in the exhaust cavity 123, which is beneficial to the aggregation of gas and thus convenient for centralized discharge.

[0053] In the present disclosure, as Figure 5 shown, a convex platform 1211 may be provided on the outside of the first convex portion 121, and the opening 1212 is provided on the convex platform 1211. With such a setting, it can be ensured that the position where the first exhaust valve 2 communicates with the inside of the battery module 100 is the highest position.

[0054] Among them, as Figure 4 and Figure 5As shown, the first convex portion 121 includes a boss 1211, and the boss 1211 can protrude from the upper cover 13, that is, the boss 1211 is at least higher than the upper cover 13 in the height direction of the energy storage cabinet 200. The above-mentioned accommodation cavity 14 refers to the cavity jointly constructed by the upper cover 13 and the lower box body 11. The accommodation cavity 14 accommodates the battery cells 20 inside. Therefore, the first exhaust valve 2 is connected to the opening 1212 on the boss 1211, and then the first exhaust valve 2 must be higher than the accommodation cavity 14. Since gas will automatically float upward, such a setting is beneficial to the exhaust of the first exhaust valve 2.

[0055] In the present disclosure, as Figure 3 shown, the protruding portion 12 may further include a second convex portion 122 located at the upper end of the side plate 112. The second convex portion 122 and the first convex portion 121 are arranged corresponding to each other and connected to each other along the height direction of the battery module 100 (such as Figure 3 the up and down direction of the drawing surface in

[0056] In the present disclosure, as Figure 1 and Figure 2 shown, the energy storage cabinet 200 may further include a pipeline structure 40. The pipeline structure 40 includes a first liquid outlet pipe 41 and a plurality of second liquid outlet pipes 42. One end of each second liquid outlet pipe 42 is adapted to communicate with the inside of the corresponding battery module 100, and the other end of each second liquid outlet pipe 42 communicates with the first liquid outlet pipe 41. The energy storage cabinet 200 further includes a second exhaust valve 30, and the second exhaust valve 30 is arranged on the first liquid outlet pipe 41. The first liquid outlet pipe 41 can be connected to the inside of the corresponding battery module 100 through a plurality of second liquid outlet pipes 42, and can drain the battery module 100 uniformly, which can simplify the pipeline structure 40, thereby saving the cabinet space of the energy storage cabinet 200, reducing the space occupation, and improving the energy density of the energy storage cabinet 200. In addition, the second exhaust valve 30 is arranged on the first liquid outlet pipe 41, and can also assist the first exhaust valve 2 in exhausting.

[0057] For example, through the second liquid outlet pipe 42 and the first liquid outlet pipe 41, the exhaust during the liquid injection stage of the battery module 100 can be completed, and the partial explosion-proof and pressure-reducing function can be realized through this pipeline.

[0058] In the present disclosure, as Figure 4 and 5As shown, an exhaust cavity 123 may be provided in the protruding portion 12. The lowest position of the exhaust cavity 123 is not lower than the highest position of the accommodating cavity 14. The liquid inlet end of the second liquid outlet pipe 42 is located in the exhaust cavity 123 and is higher than the highest position of the accommodating cavity 14. With such a setting, it can be ensured that the coolant 70 in the accommodating cavity 14 can only be discharged through the second liquid outlet pipe 42 after being filled, that is, the liquid level height of the coolant 70 is always higher than the height of the liquid inlet end of the second liquid outlet pipe 42, ensuring that the entire battery cell 20 can be completely immersed in the coolant 70.

[0059] In some embodiments, a gap is left between the upper cover 13 and the upper part of the battery cell 20 for the coolant 70 flow channel to pass through, further ensuring that the battery cell 20 can be completely immersed in the coolant 70.

[0060] In the present disclosure, the battery cell is adapted to be immersed in the coolant of the battery box 10. That is, the battery cells inside the battery module 100 are adapted to be in direct contact with the coolant inside the battery module 100 and be immersed by the coolant. Here, the heat exchange method of the battery cell can be heat exchange by coolant immersion.

[0061] In the present disclosure, as Figure 3 and 4 shown, a through hole 124 is provided on the lower surface of the protruding portion 12, and the second liquid outlet pipe 42 is inserted through the through hole 124. The provision of the through hole 124 facilitates the connection of the liquid inlet end of the second liquid outlet pipe 42.

[0062] In some embodiments, as Figure 3 and 4 shown, in order to facilitate the connection of the second liquid outlet pipe 42, a first joint 43 may be provided to connect to the second liquid outlet pipe 42. The upper end of the first joint 43 is higher than the highest position of the accommodating cavity 14, and the first joint 43 is inserted through the through hole 124. Here, the upper end of the first joint 43 is configured as the liquid inlet end of the second liquid outlet pipe 42.

[0063] In some embodiments, the axis of the first joint 43 may be perpendicular to the upper cover 13, and a reverse plug-in connection is formed between the first joint 43 and the battery module 100. In this way, when the coolant 70 is discharged, it can be discharged by gravity, and it is convenient for the layout of the second liquid outlet pipe 42.

[0064] In the present disclosure, as Figure 1 shown, in embodiments where multiple accommodating spaces are arranged along the height direction of the energy storage cabinet 200, the first liquid outlet pipe 41 may extend along the height direction of the energy storage cabinet 200, and the second exhaust valve 30 is provided at the upper end of the first liquid outlet pipe 41. It can facilitate the first liquid outlet pipe 41 and the second liquid outlet pipe 42 and facilitate the layout of the positions of the first liquid outlet pipe 41 and the second liquid outlet pipe 42. Due to the principle of gas floating, setting the second exhaust valve 30 at the upper end of the first liquid outlet pipe 41 can facilitate the discharge and complete discharge of the gas.

[0065] In some embodiments, the second exhaust valve 30 is disposed at the upper end of the first liquid outlet pipe 41 for exhausting air. A control valve (such as a ball valve) may be disposed at the lower end of the first liquid outlet pipe 41, which can be used to control the outflow of the coolant 70.

[0066] In the present disclosure, the first liquid outlet pipe 41 can be set as a straight pipe, which is not only convenient for layout and installation, but also beneficial to the smooth flow of the coolant 70.

[0067] In the present disclosure, as Figure 1 shown, the pipeline structure 40 further includes a first liquid inlet pipe 44 and a plurality of second liquid inlet pipes 45. The liquid inlet ends of each second liquid inlet pipe 45 are respectively communicated with the first liquid inlet pipe 44, and the liquid outlet ends of each second liquid inlet pipe 45 are adapted to be internally communicated with the corresponding battery module 100. With such a setting, not only can space be saved, but also it is convenient to uniformly supply liquid to the battery module 100 and convenient for later supplementary liquid addition. That is, for secondary liquid injection, it is not necessary to disassemble the battery module 100, and uniform supplementary liquid addition can be achieved as long as liquid is injected into the first liquid inlet pipe 44.

[0068] In the present disclosure, as Figure 1 shown, in the embodiment where a plurality of accommodation spaces are arranged along the height direction of the energy storage cabinet 200, the first liquid inlet pipe 44 can extend along the height direction of the energy storage cabinet 200, and the liquid inlet end of the first liquid inlet pipe 44 is located at the upper end or the lower end of the first liquid inlet pipe 44. With such a setting, it is convenient to connect the first liquid inlet pipe 44 to the second liquid inlet pipes 45. The liquid inlet end of the first liquid inlet pipe 44 can be arranged at the upper end or the lower end, and the liquid inlet end can be communicated with a pipeline for transporting the coolant 70 (such as the coolant 70 pipeline of an air conditioning system) to obtain the coolant 70, and then the coolant 70 is sent into the battery module 100 through the first liquid inlet pipe 44 and the second liquid inlet pipes 45.

[0069] In some embodiments, a control valve (such as a ball valve) is connected and disposed at the upper end or the lower end of the first liquid inlet pipe 44 for controlling the input of the coolant 70.

[0070] In the present disclosure, the first liquid inlet pipe 44 can be set as a straight pipe, which is not only convenient for layout and installation, but also beneficial to the smooth flow of the coolant 70.

[0071] In the present disclosure, in order to save the space of the energy storage cabinet 200, as Figure 1 shown, the first liquid inlet pipe 44 and the first liquid outlet pipe 41 can be located on the same side of the energy storage cabinet 200. With such a setting, the integration degree of the pipeline structure 40 can be improved, the layout of the pipeline structure 40 is convenient to design, and it is beneficial to improve the space utilization rate inside the cabinet.

[0072] For example, when the battery modules 100 are stacked and installed, the first liquid outlet pipe 41 and the first liquid inlet pipe 44 can be arranged at the front end of the cabinet, that is, the side where the cabinet door is opened, which is convenient for maintenance and installation.

[0073] In the present disclosure, as Figure 1 shown, the second liquid inlet pipe 45 and the second liquid outlet pipe 42 are located on the same side of the energy storage cabinet 200, and are arranged on the same side of the energy storage cabinet 200 as the first liquid outlet pipe 41. This facilitates the connection between the second liquid inlet pipe 45 and the first liquid inlet pipe 44 and the connection between the second liquid outlet pipe 42 and the second liquid outlet pipe 42, facilitates the design of the layout of the pipeline structure 40, and is conducive to improving the space utilization rate inside the cabinet.

[0074] The same side of the energy storage cabinet 200 here means that after installing the battery module 100, the second liquid inlet pipe 45 and the second liquid outlet pipe 42 are located on the same side of the battery module 100, which can improve the installation integration degree of the second liquid inlet pipe 45 and the second liquid outlet pipe 42.

[0075] In the present disclosure, as Figures 1 to 4 shown, the liquid outlet end of the second liquid inlet pipe 45 is located at the lower part of the battery module 100. Since the liquid inlet end of the second liquid outlet pipe 42 is arranged at the upper end of the battery module 100 and is communicated with the exhaust cavity 123, arranging the liquid outlet end of the second liquid inlet pipe 45 at the lower part of the battery module 100 can enable the coolant 70 that has just entered the battery module 100 to at least flow through the accommodation cavity 14 for heat exchange and then flow out through the second liquid outlet pipe 42, thereby improving the heat exchange effect.

[0076] In some embodiments, as Figure 3 shown, the second liquid inlet pipe 45 can be connected to the battery box body 1 through the second joint 46, and the second joint 46 can be configured as the liquid outlet end of the second liquid inlet pipe 45, which facilitates the connection of the second liquid inlet pipe 45. Among them, the diameter of the first exhaust valve 2 is larger than the diameter of the second joint 46 to ensure smooth exhaust.

[0077] When injecting the coolant 70, open the control valve (liquid inlet valve 50) provided on the first liquid inlet pipe 44 and close the control valve (liquid outlet valve 60) provided on the first liquid outlet pipe 41, and introduce the coolant 70. The coolant 70 enters the first liquid inlet pipe 44 through the control valve provided on the first liquid inlet pipe 44, and then enters the battery module 100 through the second liquid inlet pipe 45. At this time, the internal pressure of the battery module 100 increases, and the internal air flows out. The second liquid outlet pipe 42 and the first liquid outlet pipe 41 are used for exhaust at this stage, and the gas mainly discharges from the second exhaust valve 30. Until the liquid level of the coolant 70 inside the battery module 100 overflows to the liquid inlet end of the second liquid outlet pipe 42, the coolant 70 higher than the liquid inlet end flows out from the second joint 46. At this time, the second liquid outlet pipe 42 and the first liquid outlet pipe 41 are mainly used for liquid outlet. And at this time, the gas that needs to be discharged mainly discharges through the first exhaust valve 2.

[0078] The present disclosure also provides an energy storage device, which may include a plurality of energy storage cabinets 200, and the plurality of energy storage cabinets 200 may be connected in series and / or in parallel.

[0079] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0080] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, without conflict, they can be combined in any appropriate manner. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0081] Furthermore, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery box, characterized in that: The battery box includes a battery box body and a first exhaust valve; The battery case body has a housing cavity for accommodating battery cells, and the battery case body is provided with a protrusion and a bottom plate, the projection of the protrusion along the height direction of the battery case is at least partially located outside the contour of the projection of the bottom plate along the height direction; the first exhaust valve is arranged on the protrusion and communicated with the housing cavity.

2. The battery box according to claim 1, characterized in that: The battery box body includes a lower box body and an upper cover, the lower box body includes the bottom plate and a side plate arranged on the bottom plate, and the upper cover is arranged on the upper end of the side plate; The protruding portion includes a first protruding portion located on the upper cover, the first protruding portion is provided with an opening communicating with the accommodating cavity, and the first exhaust valve is connected to the opening.

3. The battery box according to claim 2, characterized in that: An exhaust cavity is disposed in the first convex portion, and the lowest position of the exhaust cavity is not lower than the highest position of the accommodating cavity.

4. The battery box according to claim 2, characterized in that: A boss is arranged on the outer side of the first convex portion, and the opening is arranged on the boss.

5. The battery box according to claim 2, characterized in that: The protruding portion further includes a second protruding portion located on the side plate, and the second protruding portion and the first protruding portion are arranged correspondingly along a height direction of the battery module and are connected to each other.

6. A battery module, characterized in that: It comprises a battery cell and a battery case according to any one of claims 1 to 5, wherein the battery cell is accommodated in the accommodating cavity.

7. The battery module according to claim 6, characterized in that: The battery cell is suitable for being immersed in the cooling liquid of the battery box.

8. An energy storage cabinet, comprising a cabinet body and a plurality of battery modules according to claim 6 or 7, characterized in that: The cabinet is provided with a receiving space, and the battery module is received in the receiving space.

9. The energy storage cabinet according to claim 8, characterized in that: The energy storage cabinet further includes a pipeline structure, the pipeline structure including a first liquid outlet pipe and a plurality of second liquid outlet pipes, one end of each of the second liquid outlet pipes is suitable for communicating with the interior of the corresponding battery module, and the other end of each of the second liquid outlet pipes is connected to the first liquid outlet pipe; The energy storage cabinet further includes a second exhaust valve, which is disposed on the first liquid outlet pipe.

10. The energy storage cabinet according to claim 9, characterized in that: An exhaust cavity is provided in the protruding portion, and the lowest position of the exhaust cavity is not lower than the highest position of the accommodating cavity; The liquid inlet end of the second liquid outlet pipe is located in the exhaust cavity.

11. The energy storage cabinet according to claim 10, characterized in that: A through hole is provided on the lower surface of the protruding portion, and the second liquid outlet pipe passes through the through hole.

12. The energy storage cabinet according to claim 9, characterized in that: The first liquid outlet pipe extends along the height direction of the energy storage cabinet, and the second exhaust valve is arranged at the upper end of the first liquid outlet pipe.

13. The energy storage cabinet according to any one of claims 9 to 12, characterized in that: The pipeline structure also includes a first liquid inlet pipe and a plurality of second liquid inlet pipes; The liquid inlet end of each second liquid inlet pipe is respectively connected to the first liquid inlet pipe, and the liquid outlet end of each second liquid inlet pipe is suitable for being connected to the interior of the corresponding battery module.

14. The energy storage cabinet according to claim 13, characterized in that: The first liquid inlet pipe extends along the height direction of the energy storage cabinet, and the liquid inlet end of the first liquid inlet pipe is located at the upper end or the lower end of the first liquid inlet pipe.

15. The energy storage cabinet according to claim 13, characterized in that: The first liquid inlet pipe and the first liquid outlet pipe are located on the same side of the energy storage cabinet.

16. The energy storage cabinet according to claim 15, characterized in that: The second liquid inlet pipe and the second liquid outlet pipe are located on the same side of the energy storage cabinet, and are arranged on the same side of the energy storage cabinet as the first liquid outlet pipe.

17. The energy storage cabinet according to claim 16, characterized in that: The liquid outlet end of the second liquid inlet pipe is located at the lower part of the battery module.

18. An energy storage device, characterized in that: The invention comprises a plurality of energy storage cabinets according to any one of claims 8 to 17.

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