Battery box, battery pack and electric equipment thereof

Abstract

The utility model discloses a battery box, a battery pack and electric equipment thereof. The battery box comprises a box body, a top plate, at least one heat insulation beam and a connecting assembly, one side of the box body in the first direction is open. The top plate is arranged on the open side of the box body, and the top plate and the box body jointly define a containing cavity. The heat insulation beams divide the containing cavity into a plurality of sub containing cavities in the second direction of the box body, and the heat insulation beams extend in the third direction of the box body. The connecting assembly connects the heat-insulating beam. According to the battery box disclosed by the utility model, the connection stability of the top plate and the heat insulation beam is improved, the interval stability of the adjacent sub-accommodating cavities is improved, the sealing performance of the sub-accommodating cavities is enhanced, and hot air diffusion caused by the fact that the top plate is jacked up due to gas pressure increase when a battery cell in any sub-accommodating cavity is in thermal runaway is avoided; and therefore, all the battery cells in the accommodating cavity are prevented from being integrally arced and ignited, and the use safety of the battery box is improved.

Description

Technical Field

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

[0002] In the related art, in order to avoid mutual influence between different battery cell modules, different battery cell modules are usually arranged in different cavities of the battery box. However, due to the poor sealing of each cavity, when a battery cell module thermally runs away, the high-temperature gas in the cavity is likely to lift up the cover above the battery cell module, thereby causing the high-temperature gas and / or electrolyte to diffuse between adjacent cavities, causing multiple battery cell modules to arc and catch fire as a whole, reducing the safety of the battery box. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery box, which increases the connection stability between the top plate and the insulation beam, enhances the sealing of the sub-accommodation cavity, avoids arcing and fire of all the battery cells in the accommodation cavity, and improves the safety of the battery box.

[0004] Another object of the present invention is to provide a battery pack using the battery box.

[0005] Another object of the present invention is to provide an electrical device using the above-mentioned battery box and / or the above-mentioned battery pack.

[0006] According to the first aspect of the utility model, the battery box includes: a box body, one side of the box body in a first direction is open; a top plate, the top plate is arranged on the open side of the box body, and the top plate and the box body jointly define a accommodating cavity; at least one thermal insulation beam, the thermal insulation beam divides the accommodating cavity into a plurality of sub-accommodating cavities along the second direction of the box body, and the thermal insulation beam extends along the third direction of the box body, wherein the first direction, the third direction and the second direction are orthogonal to each other; a connecting component, the connecting component connects the top plate and the thermal insulation beam.

[0007] According to the battery box of the embodiment of the utility model, a plurality of sub-accommodation chambers are separated by heat-insulating beams in the box body, and the heat-insulating beams and the top plate are connected by a connecting assembly. Thus, the connection stability between the top plate and the heat-insulating beams is increased, the spacing stability between adjacent sub-accommodation chambers is improved, and the sealing of the sub-accommodation chambers is enhanced, so that the gas pressure is not increased when the battery cell in any sub-accommodation chamber is in thermal runaway, and the top plate is lifted up, causing the hot air flow to diffuse, thereby preventing all the battery cells in the accommodation chamber from arcing and catching fire as a whole, and improving the safety of the battery box.

[0008] According to some embodiments of the utility model, the battery box also includes a thermal insulation member, which is pressed between the top plate and the thermal insulation beam, and one end of the connecting assembly passes through the top plate and is connected to the thermal insulation member and the thermal insulation beam.

[0009] According to some embodiments of the present utility model, a mounting groove is formed on one side of the thermal insulation beam facing the top plate, and the thermal insulation component is arranged in the mounting groove.

[0010] According to some embodiments of the utility model, a plurality of mounting holes are formed on the top plate, and the connecting assembly includes a compression rivet and an expansion nail, the compression rivet is arranged in the mounting hole, and the expansion nail passes through the compression rivet and the insulation component to be connected to the insulation beam.

[0011] According to some embodiments of the present invention, the depth of the mounting hole in the first direction of the box body is H1, and the thickness of the top plate in the first direction of the box body is H2, wherein H1 and H2 satisfy: 0.5≤H1 / H2≤0.6.

[0012] According to some embodiments of the utility model, the battery box includes a plurality of explosion-proof beams, and the plurality of explosion-proof beams correspond one-to-one to the plurality of thermal insulation beams. Each of the explosion-proof beams is located between the thermal insulation beam and the bottom wall of the box body. Each of the explosion-proof beams has an airflow channel, and the airflow channel is suitable for being connected with the corresponding sub-accommodation cavity, and the airflow channel is connected with the outside world.

[0013] According to some embodiments of the present invention, the top plate is a liquid cooling plate.

[0014] According to some embodiments of the present utility model, the liquid cooling plate includes a temperature-averaging plate and a flow channel plate, and one end of the connecting component passes through the temperature-averaging plate and the flow channel plate to be connected to the insulation beam, wherein the connecting component avoids the flow channel of the flow channel plate.

[0015] According to some embodiments of the utility model, the thermal insulation component includes at least one of a ceramic high temperature resistant thermal insulation cotton rubber pad and a thermal insulation glue.

[0016] A battery pack according to an embodiment of the second aspect of the present invention comprises a battery box, wherein the battery box is the battery box according to the embodiment of the first aspect of the present invention; and a plurality of battery modules, wherein the plurality of battery modules are placed in the battery box.

[0017] The electrical equipment according to the third aspect of the present invention comprises the battery box according to the first aspect of the present invention and / or the battery pack according to the second aspect of the present invention.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a partial exploded view of a battery box according to an embodiment of the utility model;

[0021] Figure 2 is a partial enlarged view of a battery box according to an embodiment of the utility model;

[0022] Figure 3 is a partial cross-sectional view of a battery box according to an embodiment of the utility model;

[0023] Figure 4 is a schematic diagram of a top plate of a battery box according to an embodiment of the utility model;

[0024] Figure 5 It is a partial schematic diagram of the top plate of the battery box according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 100: battery box;

[0027] 1: box body; 11: accommodating chamber; 111: sub-accommodating chamber; 2: top plate; 21: mounting hole; 22: temperature-averaging plate; 23: flow channel plate; 231: flow channel; 3: thermal insulation beam; 31: mounting groove; 4: connecting assembly; 41: rivet; 42: expansion nail; 5: thermal insulation; 6: bomb disposal beam; 61: air flow channel; 62: first bomb disposal section; 63: second bomb disposal section; 64: third bomb disposal section. DETAILED DESCRIPTION

[0028] Reference below Figure 1-Figure 5 A battery box 100 according to an embodiment of the first aspect of the present invention is described.

[0029] like Figure 1-Figure 5 As shown, the battery box 100 according to the first embodiment of the utility model includes a box body 1, a top plate 2, at least one insulation beam 3 and a connecting assembly 4.

[0030] Specifically, the first direction of the box 1 (for example, Figure 1 The top plate 2 is disposed on the open side of the box body 1, and the top plate 2 and the box body 1 together define a receiving cavity 11. The heat insulation beam 3 connects the receiving cavity 11 along the second direction of the box body 1 (for example, Figure 1The heat insulation beam 3 is divided into a plurality of sub-accommodation chambers 111 along the left and right directions of the box body 1. In the description of the present utility model, the meaning of "plurality" is two or more. Figure 1 The heat-insulating beam 3 is used to block the transfer of heat between two adjacent sub-accommodating chambers 111. The first direction, the third direction and the second direction are orthogonal to each other. The connecting component 4 connects the heat-insulating beam 3.

[0031] The first direction is a thickness direction, the second direction may be a length direction, and the third direction is a width direction, but the invention is not limited thereto.

[0032] For example, in Figure 1 and Figure 2 In the example, the top plate 2 is connected to the open side of the box body 1, and two thermal insulation beams 3 are arranged at intervals in the second direction of the box body 1. The two thermal insulation beams 3 divide the accommodating chamber 11 into three sub-accommodating chambers 111. The sub-accommodating chambers 111 are suitable for placing a battery module composed of multiple battery cells. In this way, multiple battery modules can be separated, and arcing and fire of other battery modules caused by thermal runaway of a battery module in a sub-accommodating chamber 111 can be avoided, which greatly improves the safety of the battery box 100. Among them, the thermal insulation beam 3 has good heat resistance, and can stably and reliably block the diffusion of hot air flow or electrolyte between adjacent sub-accommodating chambers 111 when the battery module thermally runs away, so as to ensure the airtightness of each sub-accommodating chamber 111.

[0033] Along the height direction of the box body 1, one side of the thermal insulation beam 3 facing the open side of the box body 1 is opposite to the top plate 2, so that the connecting component 4 connects the top plate 2 and the thermal insulation beam 3 in the height direction of the box body 1, to prevent the gas pressure from increasing and lifting the top plate 2 when the battery cell in any sub-cavity 111 has thermal runaway, causing the hot air flow to diffuse into the adjacent sub-cavity 111, thereby further enhancing the airtightness of each sub-cavity 111, avoiding the arcing and fire of the battery cell in the cavity 11 as a whole, and improving the safety of the battery box 100.

[0034] In addition, the thermal insulation beam 3 is heat-resistant, which is beneficial to extending the service life of the thermal insulation beam 3 and avoiding the reduction of the connection stability between the thermal insulation beam 3 and the connecting component 4 when the battery cells in any sub-cavity 111 are thermally runaway, that is, the connection stability between the connecting component 4 and the thermal insulation beam 3 is improved, thereby further improving the use stability of the battery box 100.

[0035] According to the battery box 100 of the embodiment of the utility model, a plurality of sub-accommodation chambers 111 are separated by heat-insulating beams 3 in the box body 1, and the heat-insulating beams 3 and the top plate 2 are connected by connecting components 4. Thus, the connection stability between the top plate 2 and the heat-insulating beams 3 is increased, the interval stability between adjacent sub-accommodation chambers 111 is improved, and the sealing of the sub-accommodation chambers 111 is enhanced, so that when the battery cells in any sub-accommodation chamber 111 are in thermal runaway, the gas pressure is prevented from increasing and the top plate 2 is lifted up, causing the hot air flow to diffuse, thereby preventing all the battery cells in the accommodation chamber 11 from arcing and catching fire as a whole, and improving the safety of the battery box 100.

[0036] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The battery box 100 also includes a heat insulating member 5, which is pressed between the top plate 2 and the heat insulating beam 3. The heat insulating member 5 is used to block the transfer of heat between the top plate 2 and the heat insulating beam 3. One end of the connecting component 4 passes through the top plate 2, the heat insulating member 5 and the heat insulating beam 3. Along the height direction of the box body 1, the top plate 2, the heat insulating member 5 and the heat insulating beam 3 are arranged in sequence, and the top plate 2, the heat insulating member 5 and the heat insulating beam 3 are connected by the connecting component 4. The heat insulating member 5 is conducive to blocking the gap between the top plate 2 and the heat insulating beam 3, thereby facilitating the improvement of the spacing stability and sealing stability of the two adjacent sub-accommodating chambers 111, and further avoiding the heat diffusion in the adjacent sub-accommodating chambers 111.

[0037] Furthermore, a mounting groove 31 is formed on one side of the thermal insulation beam 3 facing the top plate 2, and the thermal insulation member 5 is arranged in the mounting groove 31. The mounting groove 31 extends along the second direction of the thermal insulation beam 3, and at least a portion of the thermal insulation member 5 abuts against the bottom wall and side wall of the mounting groove 31, and a side surface of the thermal insulation member 5 away from the thermal insulation beam 3 abuts against the top plate 2. Thus, the mounting groove 31 can limit the thermal insulation member 5, thereby increasing the installation stability of the thermal insulation member 5, and at the same time, it can prevent the hot air flow or electrolyte in any sub-accommodation cavity 111 on both sides of the thermal insulation beam 3 from acting on the thermal insulation member 5, thereby further improving the sealing stability of the sub-accommodation cavity 111.

[0038] In addition, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5, a plurality of mounting holes 21 are formed on the top plate 2. The connection component 4 includes a rivet 41 and an expansion nail 42. The rivet 41 is arranged in the mounting hole 21, and the expansion nail 42 passes through the rivet 41 and the insulation member 5 to be connected to the insulation beam 3. Six mounting holes 21 are arranged on the top plate 2 along the third direction of the box body 1 at intervals, and each mounting hole 21 is suitable for installing a connection component 4 to increase the connection stability between the top plate 2 and the insulation beam 3. The rivet 41 of the connection component 4 is arranged in the mounting hole 21, and the expansion nail 42 is interference fit on the rivet 41 to form a rivet composite nail. During installation, align the mounting hole 21 with the insulation beam 3, and the expansion nail 42 passes through the rivet 41 from the side of the top plate 2 away from the box body 1 and then connects to the insulation beam 3. Therefore, the connection method between the top plate 2 and the insulation beam 3 is simple, and the connection stability between the top plate 2 and the insulation beam 3 is increased, so that if thermal runaway occurs in any sub-cavity 111 on both sides of the insulation beam 3, the high-temperature and high-pressure gas in the sub-cavity 111 will find it difficult to separate the top plate 2 and the insulation beam 3, thereby avoiding the thermal runaway from spreading in the two adjacent sub-cavities 111, improving the spacing stability between the two adjacent sub-cavities 111, and improving the safety of the battery box 100.

[0039] Further, refer to Figure 5 , the depth of the mounting hole 21 in the first direction of the box body 1 is H1, and the thickness of the top plate 2 in the first direction of the box body 1 is H2, wherein H1 and H2 satisfy: 0.5≤H1 / H2≤0.6. When H1 / H2<0.5, the depth of the mounting hole 21 in the first direction of the box body 1 accounts for a small proportion of the thickness of the top plate 2, and the installation depth of the rivet 41 in the top plate 2 is small, so that when the expansion nail 42 passes through the rivet 41, the pressure of the expansion nail 42 penetrating the top plate 2 is large, and the expansion nail 42 is easy to tilt, thereby reducing the connection accuracy between the top plate 2 and the insulation beam 3, which is not conducive to the processing and assembly of the battery box 100; when H1 / H2>0.6, the depth of the mounting hole 21 in the first direction of the box body 1 accounts for a large proportion of the thickness of the top plate 2, which is easy to reduce the matching stability between the expansion nail 42 and the rivet 41, thereby reducing the stability of the connection assembly 4 connecting the top plate 2 and the insulation beam 3. Therefore, by setting the ratio of the depth of the mounting hole 21 in the first direction of the box body 1 to the thickness of the top plate 2 to 0.5≤H1 / H2≤0.6, the design of the mounting hole 21 is made more reasonable, that is, the mounting hole 21 is suitable for the use of the rivet 41, and at the same time, the matching stability of the rivet 41 and the expansion nail 42 is increased, so as to give full play to the effect of the connecting component 4, and reliably connect the top plate 2 and the insulation beam 3 through the connecting component 4.

[0040] According to some embodiments of the utility model, the battery box 100 further includes a plurality of explosion-disposal beams 6, which correspond to the plurality of heat-insulating beams 3 one by one, and each explosion-disposal beam 6 is located between the heat-insulating beam 3 and the bottom wall of the box body 1. Each explosion-disposal beam 6 has an airflow channel 61, which is suitable for communicating with the corresponding sub-accommodation cavity 111, and the airflow channel 61 is connected to the outside. An explosion-disposal beam 6 is provided between the heat-insulating beam 3 and the bottom wall of the box body 1 along the first direction of the box body 1, and the explosion-disposal beam 6 extends along the third direction of the box body 1, and the airflow channel 61 in the explosion-disposal beam 6 also extends along the third direction of the box body 1. The airflow channel 61 of the explosion-disposal beam 6 is connected to the corresponding sub-accommodation cavity 111 on both sides of the second direction. When the air pressure in the sub-accommodation cavity 111 is too high, the high-pressure gas in the sub-accommodation cavity 111 flows to the airflow channel 61, and then is discharged to the outside through the airflow channel 61. In this way, deformation of the box body 1 and the top plate 2 caused by excessive air pressure is avoided, and thermal explosion of the battery cells in the sub-accommodating cavity 111 is avoided, thereby improving the safety and stability of the battery box 100.

[0041] Among them, refer to Figure 2 and Figure 3 The bomb disposal beam 6 includes a first bomb disposal section 62, two second bomb disposal sections 63 and two third bomb disposal sections 64 connected in sequence, and the first bomb disposal section 62, two second bomb disposal sections 63, two third bomb disposal sections 64 and the box body 1 jointly define an airflow channel 61. Among them, the first bomb disposal section 62 is relatively connected to the side of the thermal insulation beam 3 away from the top plate 2, which increases the connection stability between the bomb disposal beam 6 and the thermal insulation beam 3. The two second bomb disposal sections 63 are respectively connected to the first bomb disposal section 62 on both sides of the second direction of the box body 1, and each second bomb disposal section 63 extends obliquely in the direction away from the thermal insulation beam 3, which increases the volume of the airflow channel 61, improves the flow efficiency of the airflow, and increases the pressure relief efficiency. One end of each second bomb disposal section 63 away from the first bomb disposal section 62 is connected to the third bomb disposal section 64, and the third bomb disposal section 64 is suitable for abutting against the bottom wall of the box body 1, thereby increasing the connection area between the bomb disposal beam 6 and the bottom wall of the box body 1, thereby improving the connection stability of the bomb disposal beam 6 in the box body 1, and further ensuring the sealing of the sub-accommodation cavity 111.

[0042] In some optional embodiments, the top plate 2 is a liquid cooling plate, wherein the liquid cooling plate is filled with water or other liquids with good thermal conductivity, and when the battery cells in the sub-accommodating cavity 111 generate too much heat, the liquid cooling plate exchanges heat with the heat generated by the battery cells to maintain a stable temperature of the battery cells, thereby improving the stability of the battery cells.

[0043] Furthermore, the liquid cooling plate includes a temperature-averaging plate 22 and a flow channel plate 23 connected in sequence. One end of the connecting component 4 passes through the temperature-averaging plate 22 and the flow channel plate 23 and is connected to the thermal insulation beam 3. Thus, the connecting component 4 connects the temperature-averaging plate 22, the flow channel plate 23 and the thermal insulation beam 3 in the height direction of the box body 1, so as to avoid the increase of gas pressure when the battery cell is thermally out of control and lift up the liquid cooling plate, causing the hot air flow to diffuse into the adjacent sub-accommodation cavity 111, and at the same time avoid the liquid cooling plate from being greatly deformed, causing the liquid in the flow channel to flow poorly, thereby ensuring the stability of heat exchange between the liquid cooling plate and the battery cell.

[0044] The connecting component 4 avoids the flow channel of the flow channel plate 23 to prevent the connecting component 4 from blocking the flow of liquid in the flow channel, thereby ensuring the normal use of the liquid cooling plate.

[0045] During installation, the rivet 41 is arranged on the temperature-averaging plate 22, and the rivet 41 is kept away from the flow channel 231 on the flow channel plate 23. The flow channel plate 23 is locally reinforced at a position adjacent to the rivet 41 to increase the structural strength of the flow channel plate 23. Then, the temperature-averaging plate 22 and the flow channel plate 23 are connected, for example, by brazing.

[0046] Optionally, the top plate 2 is made of a steel plate or a polypropylene plate. Among them, the steel plate has excellent heat resistance, corrosion resistance and mechanical properties. The use of the steel plate as the top plate 2 prolongs the use strength of the top plate 2, and makes the top plate 2 easy to process, thereby reducing the production cost of the top plate 2. The polypropylene plate has excellent heat resistance, mechanical properties, heat insulation properties, high impact energy absorption capacity and stress cracking resistance. The use of the polypropylene plate as the top plate 2 is conducive to improving the durability of the top plate 2 and prolonging the service life of the top plate 2.

[0047] According to some specific embodiments of the utility model, the thermal insulation member 5 includes at least one of a ceramic high temperature resistant thermal insulation cotton rubber pad and a thermal insulation glue. Among them, the ceramic high temperature resistant thermal insulation cotton rubber pad has the advantages of low thermal conductivity, low specific heat and excellent thermal insulation performance; the thermal insulation glue has the advantages of high thermal stability and good electrical insulation performance. Therefore, at least one of the ceramic high temperature resistant thermal insulation cotton rubber pad and the thermal insulation glue is used as the thermal insulation member 5, which improves the thermal insulation effect of the thermal insulation member 5, facilitates the use of the thermal insulation member 5 to block the transfer of temperature in two adjacent sub-accommodation chambers 111, and improves the airtightness of each sub-accommodation chamber 111.

[0048] A battery pack (not shown) according to an embodiment of the second aspect of the present invention comprises a battery box 100 and a plurality of battery modules. The battery box 100 is the battery box 100 according to the embodiment of the first aspect of the present invention, and the plurality of battery modules are placed in the battery box 100.

[0049] According to the battery pack of the embodiment of the utility model, by adopting the above-mentioned battery box 100, the risk of the battery pack being out of control is reduced, which is beneficial to improving the use stability and safety of the battery pack and extending the service life of the battery pack.

[0050] The electrical equipment (not shown) according to the third aspect of the present invention comprises the battery box 100 according to the first aspect of the present invention and / or the battery pack according to the second aspect of the present invention.

[0051] According to the electric equipment of the embodiment of the utility model, by adopting the above-mentioned battery box 100 and / or the above-mentioned battery pack, it is beneficial to improve the stability of the power output of the electric equipment, thereby improving the user experience of the electric equipment, and further improving the market competitiveness of the electric equipment.

[0052] Other structures and operations of the battery pack and the electrical equipment according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0053] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery box, characterized in that: include: A box body, wherein one side of the box body in a first direction is open; A top plate, the top plate being arranged at the open side of the box body, the top plate and the box body jointly defining a receiving cavity; at least one heat-insulating beam, wherein the heat-insulating beam divides the accommodating cavity into a plurality of sub-accommodating cavities along a second direction of the box body, and the heat-insulating beam extends along a third direction of the box body, wherein the first direction, the third direction and the second direction are orthogonal to each other; A connecting assembly connects the top plate and the thermal insulation beam.

2. The battery box according to claim 1, characterized in that: Also includes: A heat insulating member is pressed tightly between the top plate and the heat insulating beam, and one end of the connecting assembly passes through the top plate and is connected to the heat insulating member and the heat insulating beam.

3. The battery box according to claim 2, characterized in that: A mounting groove is formed on one side of the heat insulation beam facing the top plate, and the heat insulation component is arranged in the mounting groove.

4. The battery box according to claim 2, characterized in that: The top plate is formed with a plurality of mounting holes. The connection assembly includes a compression rivet and an expansion nail. The compression rivet is arranged in the mounting hole, and the expansion nail passes through the compression rivet and the insulation member to be connected to the insulation beam.

5. The battery box according to claim 4, characterized in that: The depth of the mounting hole in the first direction of the box body is H1, and the thickness of the top plate in the first direction of the box body is H2, wherein H1 and H2 satisfy: 0.5≤H1 / H2≤0.

6.

6. The battery box according to any one of claims 1 to 5, characterized in that: Also includes: A plurality of bomb disposal beams, each of which corresponds to the plurality of thermal insulation beams, each of which is located between the thermal insulation beam and the bottom wall of the box body, and each of which has an air flow channel, which is suitable for communicating with the corresponding sub-accommodation cavity and is connected with the outside.

7. The battery box according to claim 1, characterized in that: The top plate is a liquid cooling plate.

8. The battery box according to claim 7, characterized in that: The liquid cooling plate includes a temperature-averaging plate and a flow channel plate, and one end of the connecting assembly passes through the temperature-averaging plate and the flow channel plate and is connected to the heat-insulating beam. Wherein, the connecting component avoids the flow channel of the flow channel plate.

9. The battery box according to claim 2, characterized in that: The heat insulating component comprises at least one of a ceramic high temperature resistant heat insulating cotton rubber pad and a heat insulating rubber.

10. A battery pack, characterized in that: include: A battery box, wherein the battery box is a battery box according to any one of claims 1 to 9; A plurality of battery modules are placed in the battery box.

11. An electrical device, characterized in that: Comprising a battery box according to any one of claims 1 to 9, and / or a battery pack according to claim 10.

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