Battery box, battery and electric equipment

Abstract

The utility model provides a battery box, battery and electric equipment, the battery box is applied to the battery, the battery box comprises a box body, the box body comprises a box main body and an expansion beam, the box main body and the expansion beam jointly limit a containing cavity, and the containing cavity is used for containing battery monomers. And the accommodating cavity can accommodate more battery monomers.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to battery box, battery and electric equipment. BACKGROUND

[0002] The battery comprises a battery box and a battery monomer, the battery box comprises a box body provided with a receiving cavity, and the receiving cavity is used for accommodating the battery monomer.

[0003] In order to reduce the occurrence of battery bulging, in the related art, the battery box further comprises an expansion beam arranged in the box body, and the expansion beam is deformed to absorb the expansion amount of the battery monomer, thereby reducing the occurrence of battery bulging.

[0004] However, the expansion beam occupies a large space in the receiving cavity, which makes the number of battery monomers that can be accommodated in the receiving cavity smaller. SUMMARY

[0005] Embodiments of the utility model provide a battery box, a battery and an electric device, which can reduce the occurrence of battery bulging and accommodate more battery monomers in the receiving cavity.

[0006] In a first aspect, the embodiments of the utility model provide a battery box, which is applied to a battery, and comprises a box body, wherein the box body comprises a box main body and an expansion beam, the box main body and the expansion beam jointly limit a receiving cavity, and the receiving cavity is used for accommodating a battery monomer.

[0007] In an embodiment, the expansion beam is provided with a weight-reducing hole, and the weight-reducing hole is provided with a plurality of holes.

[0008] In an embodiment, the weight-reducing hole is arranged on the inner side of the box body.

[0009] In an embodiment, the battery box further comprises a cover plate, and the cover plate is used for covering the weight-reducing hole.

[0010] In an embodiment, the cover plate is detachably connected with the expansion beam.

[0011] In an embodiment, the battery box further comprises a bolt for locking the cover plate to the expansion beam.

[0012] In an embodiment, a countersunk hole is arranged on the side of the cover plate away from the expansion beam, and the bolt is arranged in the countersunk hole.

[0013] In an embodiment, the battery box further comprises a heat exchange flow path provided in the box body, the heat exchange flow path being configured to exchange heat with the battery monomer, and the heat exchange flow path being at least partially provided in the expansion beam.

[0014] In an embodiment, the heat exchange flow path is provided outside the receiving cavity.

[0015] In an embodiment, the heat exchange flow path further comprises a flow channel formed in the box body, and an inlet and outlet pipe provided in the box body, the inlet and outlet pipe being in communication with the flow channel, the inlet and outlet pipe being configured to allow fluid to enter and exit the flow channel, and the inlet and outlet pipe being provided in the expansion beam.

[0016] In an embodiment, the box body comprises a bottom plate and a top plate opposite to the bottom plate, the expansion beam connecting the top plate and the bottom plate, the flow channel being formed in the bottom plate, and the inlet and outlet pipe and the expansion beam being provided between the top plate and the bottom plate.

[0017] And / or, the inlet and outlet pipe is welded to the bottom plate and / or the expansion beam.

[0018] In an embodiment, the box body comprises a top plate, a bottom plate, a first side beam, and two second side beams, the top plate and the bottom plate being oppositely arranged in the height direction of the box body, the first side beam and the expansion beam being oppositely arranged in the length direction of the box body, and the two second side beams being oppositely arranged in the width direction of the box body.

[0019] In a second aspect, an embodiment of the utility model provides a battery, the battery comprising the battery box.

[0020] In a third aspect, an embodiment of the utility model provides a power consumption device, the power consumption device comprising the battery.

[0021] The embodiment of the utility model has the advantages of:

[0022] In the embodiment of the utility model, the expansion beam becomes part of the box body, and cooperates with the box body to limit the receiving cavity, thereby freeing up part of the space of the receiving cavity for the battery monomer. In this way, the battery box can not only reduce the occurrence of battery bulging, but also can accommodate more battery monomers in the receiving cavity. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0024] Figure 1 is a perspective view of the battery box, wherein the top plate is not shown;

[0025] Figure 2 is Figure 1 is a top view of the battery box;

[0026] Figure 3 Figure 1 is an exploded view of the battery box;

[0027] Figure 4 is Figure 3 is an enlarged view of A in the battery box;

[0028] Figure 5 is Figure 3 is a structural schematic view of the bottom plate and the heat exchange flow path;

[0029] Figure 6 is Figure 3 is a structural schematic view of the cover plate.

[0030] 100, battery box; 110, receiving cavity; 200, bottom plate; 300, first side beam; 400, second side beam; 500, expansion beam; 510, weight-reducing hole; 520, avoiding cavity; 600, cover plate; 610, countersunk hole; 700, bolt; 800, heat exchange flow path; 810, inlet and outlet pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" refer to the contour of the device.

[0032] The battery comprises a battery box and a battery monomer, and the battery box comprises a box body provided with a receiving cavity, and the receiving cavity is used for accommodating the battery monomer. The battery monomer will swell when in operation, so that the battery is prone to bulging. Specifically, the battery monomer is pressed against the box body after swelling, so that the box body is deformed.

[0033] In order to reduce the occurrence of battery bulging, in the related art, the battery box further includes an expansion beam arranged in the box body, and the expansion beam absorbs the expansion amount of the battery monomer by deforming to reduce the occurrence of battery bulging.

[0034] Specifically, in the related art, the box body is arranged in a cuboid, the battery box includes two expansion beams arranged in the accommodation cavity, the two expansion beams are arranged in the length direction of the box body, and the battery monomer is arranged between the two expansion beams. In the length direction of the box body, the expansion beam is spaced apart from the opposite wall of the box body to form an expansion space.

[0035] When the battery monomer expands, the battery monomer is pressed against the expansion beam, and the expansion space provides a space for the expansion beam to deform. In this way, the deformation of the box body is reduced, that is, the bulging of the battery is reduced.

[0036] However, in the accommodation cavity of the box body, not only the expansion beam occupies the space of the accommodation cavity, but also the expansion space occupies the space of the accommodation cavity. This makes the number of battery monomers that can be accommodated in the accommodation cavity less.

[0037] Therefore, the embodiments of the utility model provide a battery box, a battery and an electrical equipment, which can not only reduce the occurrence of battery bulging, but also enable the accommodation cavity to accommodate more battery monomers.

[0038] In the present application, the battery monomer can include a lithium ion secondary battery monomer, a lithium ion primary battery monomer, a lithium-sulfur battery monomer, a sodium lithium ion battery monomer, a sodium ion battery monomer or a magnesium ion battery monomer, etc. The embodiments of the present application are not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are not limited thereto.

[0039] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery monomers to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. Referring to Figures 1 to 3 , the battery generally includes a battery box 100 for packaging one or more battery monomers. The battery box 100 can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomer.

[0040] The battery cell mentioned in the embodiments of the present application can include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode tab, a negative electrode tab and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode coating area coated with the positive electrode active material layer and a positive electrode lug connected to the positive electrode coating area and not coated with the positive electrode active material layer. Taking a lithium ion battery cell as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, which can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area coated with the negative electrode active material layer and a negative electrode lug connected to the negative electrode coating area and not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0041] At present, the application of batteries is more and more extensive. The batteries are not only applied to energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, and many other fields such as military equipment and aerospace. With the continuous expansion of the application field of the battery, the market demand is also increasing.

[0042] The battery described in the embodiments of the present application is used for an electric device.

[0043] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc.; the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above electric devices.

[0044] The following embodiments take the electric device as a vehicle for example for convenient description.

[0045] The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended range vehicle. The vehicle is internally provided with a battery. The battery can be arranged at the bottom, head or tail of the vehicle. The battery can be used for power supply of the vehicle, for example, the battery can be used as an operating power source of the vehicle. The vehicle can further include a controller and a motor. The controller is used to control the battery to supply power to the motor, for example, to meet the power demand of the vehicle during starting, navigation and driving.

[0046] In some embodiments of the present application, the battery can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle.

[0047] With reference to Figures 1 to 4 In an embodiment of the utility model, the battery box 100 is applied to the battery. The battery box 100 includes a box body. The box body includes a box main body and an expansion beam 500. The box main body and the expansion beam 500 jointly limit a receiving cavity 110. The receiving cavity 110 is used for accommodating a battery monomer.

[0048] In this way, the expansion beam 500 becomes part of the box body and jointly limits the receiving cavity 110 with the box main body to vacate part of the space of the receiving cavity 110 for the battery monomer. In this way, the battery box 100 can not only reduce the occurrence of the battery bulging, but also enable the receiving cavity 110 to accommodate more battery monomers.

[0049] In addition, the expansion space corresponding to the expansion beam 500 is located outside the box body, that is, the expansion space does not occupy the space of the receiving cavity 110.

[0050] The box body can adopt various structures. In an embodiment, the box body includes a top plate, a bottom plate 200, a first side beam 300, and two second side beams 400. The top plate and the bottom plate 200 are arranged opposite to each other in the height direction of the box body. The first side beam 300 and the expansion beam 500 are arranged opposite to each other in the length direction of the box body. The two second side beams 400 are arranged opposite to each other in the width direction of the box body. It can be understood that the box body is a hollow structure with one end open. The expansion beam 500 is arranged at the open side of the box body, so that the expansion beam 500 and the box body jointly define the accommodation cavity 110. The top plate, the bottom plate 200, the first side beam 300, and the two second side beams 400 are connected to form the box body. The open side of the box body is opposite to the first side beam 300, and the expansion beam 500 is arranged at the open side. In this way, the box body as a whole is arranged in a cuboid shape, which makes the shape of the box body more regular. Of course, in some other embodiments, the box body can also have other shapes, for example, a cylindrical shape. Alternatively, the box body includes a top plate, a bottom plate 200, and two second side beams 400. The top plate and the bottom plate 200 are arranged opposite to each other in the height direction of the box body. The two second side beams 400 are arranged opposite to each other in the width direction of the box body. It can be understood that the box body is a hollow structure with both ends open in the length direction of the box body. Two expansion beams 500 are arranged opposite to each other in the length direction of the box body and are arranged at the two open sides of the box body, respectively, so that the two expansion beams 500 and the box body jointly define the accommodation cavity 110. The top plate, the bottom plate 200, and the two second side beams 400 are connected to form the box body. The two open sides of the box body are respectively provided with the expansion beams 500.

[0051] It is worth mentioning that, for the battery, the accommodation cavity 110 can accommodate a plurality of battery monomers, for example. The plurality of battery monomers can be connected in series, in parallel, or in a mixed manner. The mixed manner means that there are both series connection and parallel connection among the plurality of battery monomers. The plurality of battery monomers can be directly connected in series, in parallel, or in a mixed manner, and then the whole formed by the plurality of battery monomers is accommodated in the box body. Of course, the battery can also be in the form of a battery module in which a plurality of battery monomers are connected in series, in parallel, or in a mixed manner, and a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box body. The battery can also include other structures, for example, the battery can also include a busbar component for realizing electrical connection between the plurality of battery monomers.

[0052] In an embodiment, the expansion beam 500 is provided with a weight-reducing hole 510. In this way, the weight of the expansion beam 500 is lighter, which is beneficial to the lightweight of the battery box 100. Further, in an embodiment, the weight-reducing hole 510 is provided with a plurality of weight-reducing holes.

[0053] The weight-reducing hole 510 can be arranged in various manners. In an embodiment, the weight-reducing hole 510 is arranged on the inner side of the box. Specifically, the expansion beam 500 has a first region forming a part of the cavity wall of the accommodation cavity 110 on the side close to the accommodation cavity 110, and the weight-reducing hole 510 is arranged in the first region. In this way, the box blocks foreign matters from entering the weight-reducing hole 510 from the external environment, reducing the possibility of the weight of the battery box 100 increasing due to foreign matters. However, the design is not limited to this. In some other embodiments, the weight-reducing hole 510 is arranged on the outer side of the box, i.e., the weight-reducing hole 510 is arranged on the surface of the expansion beam 500 outside the box.

[0054] During the expansion of the battery cell, the battery cell is pressed against the expansion beam 500. In order to avoid the battery cell being partially trapped in the weight-reducing hole 510 and thus being severely deformed to cause a safety accident, in an embodiment, the battery box 100 further comprises a cover plate 600 for covering the weight-reducing hole 510. In this way, the battery cell can be prevented from being trapped in the weight-reducing hole 510 when the cover plate 600 is assembled.

[0055] It is worth mentioning that, for the battery, the projection of the battery cell in the direction close to the expansion beam 500 is located in the projection of the cover plate 600. In this way, during the pressing of the battery cell against the cover plate 600, the edge of the cover plate 600 can be prevented from pressing the battery cell, which is beneficial to reducing the deformation of the battery cell caused by the pressing of the cover plate 600 and reducing the occurrence of safety accidents.

[0056] The cover plate 600 can be connected to the expansion beam 500 in various manners. In an embodiment, the cover plate 600 is detachably connected to the expansion beam 500. However, the design is not limited to this. In some other embodiments, the cover plate 600 is non-detachably connected to the expansion beam 500, for example but not limited to, riveting or welding.

[0057] The cover plate 600 can be detachably connected to the expansion beam 500 in various manners. In an embodiment, the battery box 100 further comprises a bolt 700 for locking the cover plate 600 to the expansion beam 500. However, the design is not limited to this. In some other embodiments, the cover plate 600 is detachably connected to the expansion beam 500.

[0058] Referring to Figure 6In order to reduce the possibility that the head of the bolt 700 scratches the battery cell during the expansion process, in an embodiment, the cover plate 600 is provided with a countersunk hole 610 on the side away from the expansion beam 500, and the bolt 700 is arranged in the countersunk hole 610. In this way, the head of the bolt 700 is located in the countersunk hole 610, and the bolt 700 does not protrude from the side of the cover plate 600 close to the battery cell. In this way, the possibility that the bolt 700 scratches the battery cell during the expansion process is reduced.

[0059] In order to reduce the influence of the ambient temperature on the operation efficiency of the battery cell, in an embodiment, the battery box 100 further comprises a heat exchange flow path 800 arranged in the box body, and the heat exchange flow path 800 is used for heat exchange with the battery cell. In this way, when the ambient temperature is high, a heat exchange fluid with a lower temperature can be introduced into the heat exchange flow path 800 to reduce the temperature of the battery cell, thereby improving the operation efficiency of the battery cell; when the ambient temperature is low, a heat exchange fluid with a higher temperature can be introduced into the heat exchange flow path 800 to increase the temperature of the battery cell, thereby improving the operation efficiency of the battery cell.

[0060] The heat exchange flow path 800 can adopt various arrangement modes. In an embodiment, the heat exchange flow path 800 is at least partially arranged in the expansion beam 500. In this way, the structure of the battery box 100 is relatively compact. However, the design is not limited to this, and in some other embodiments, the heat exchange flow path 800 is arranged on the outside of the box body and abuts against the box body.

[0061] In an embodiment, the heat exchange flow path 800 is arranged outside the receiving cavity 110. In this way, once the heat exchange flow path 800 leaks, the possibility that the leaked liquid of the heat exchange flow path 800 flows into the receiving cavity 110 and contacts the battery cell can be reduced. However, the design is not limited to this, and in some other embodiments, the heat exchange flow path 800 is partially arranged in the receiving cavity 110 to directly contact the battery cell. In this way, the efficiency of heat exchange between the heat exchange flow path 800 and the battery cell can be improved.

[0062] In an embodiment, the heat exchange flow path 800 further comprises a flow channel formed in the box body and an inlet and outlet pipe 810 arranged on the box body, the inlet and outlet pipe 810 communicates with the flow channel, the inlet and outlet pipe 810 is used for fluid to flow into and out of the flow channel, and the inlet and outlet pipe 810 is arranged in the expansion beam 500. In this way, the structure of the battery box 100 is relatively compact. However, the design is not limited to this, and in some other embodiments, the flow channel can also have a tubular structure and be arranged on the outside of the box body.

[0063] For reference Figure 5 In an embodiment, the box body comprises a bottom plate 200 and a top plate opposite to the bottom plate 200, the expansion beam 500 connects the top plate and the bottom plate 200, the bottom plate 200 is provided with a flow channel, and the inlet and outlet pipe 810 and the expansion beam 500 are arranged between the top plate and the bottom plate 200.

[0064] Exemplarily, the expansion beam 500 is provided with an avoiding cavity 520, an opening of the avoiding cavity 520 extending from a side of the expansion beam 500 close to the accommodating cavity 110 to a side of the expansion beam 500 close to the bottom plate 200. In this way, the access pipe 810 can enter the avoiding cavity 520. The expansion beam 500 is further provided with a through hole for the access pipe 810 to pass through, so that the access pipe 810 can be connected to a supply device for providing the heat exchange fluid.

[0065] However, the design is not limited to this. In other embodiments, the top plate is formed with the flow channel, and the access pipe 810 is arranged on the top plate.

[0066] In an embodiment, the access pipe 810 is welded to the bottom plate 200. In this way, the access pipe 810 is more stably connected to the bottom plate 200. In this way, the connection between the access pipe 810 and the bottom plate 200 is less likely to be damaged, thereby reducing the possibility of leakage of the heat exchange flow path 800 at the connection between the access pipe 810 and the bottom plate 200. However, the design is not limited to this. In some other embodiments, the access pipe 810 is clamped to the bottom plate 200.

[0067] In an embodiment, the access pipe 810 is welded to the expansion beam 500. In this way, the access pipe 810 is more stably connected to the expansion beam 500. This is conducive to reducing the degree of shaking of the access pipe 810, thereby reducing the possibility of damage to the connection between the access pipe 810 and the bottom plate 200, and further reducing the possibility of leakage of the heat exchange flow path 800 at the connection between the access pipe 810 and the bottom plate 200. However, the design is not limited to this. In some other embodiments, the access pipe 810 is clamped to the expansion beam 500.

[0068] In an embodiment, the access pipe 810 is provided with two access pipes 810, one of which is used for the heat exchange fluid to flow into the heat exchange flow path 800, and the other of which is used for the heat exchange fluid to flow out of the heat exchange flow path 800.

[0069] In a second aspect, the embodiments of the utility model provide a battery, the battery includes the battery box 100, the battery box 100 adopts all technical schemes of above-mentioned embodiments, and therefore at least has all beneficial effects brought by technical schemes of above-mentioned embodiments, which will not be repeated here. Wherein, the battery further includes a battery monomer arranged in the accommodating cavity 110.

[0070] In a second aspect, the embodiments of the utility model provide a battery, the battery includes the battery box 100, the battery box 100 adopts all technical schemes of above-mentioned embodiments, and therefore at least has all beneficial effects brought by technical schemes of above-mentioned embodiments, which will not be repeated here. Wherein, the battery further includes a battery monomer arranged in the accommodating cavity 110.

[0071] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been described in this article by applying specific examples, the above embodiment explanation is only for helping understanding the method and its core thought of the utility model; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery case, used in batteries, characterized in that, The battery box includes a box body, which includes a box body and an expansion beam. The box body and the expansion beam together define a receiving cavity for accommodating individual battery cells.

2. The battery box according to claim 1, characterized in that, The expansion beam is provided with weight-reducing holes, and there are multiple weight-reducing holes.

3. The battery box according to claim 2, characterized in that, The weight reduction hole is located on the inside of the box.

4. The battery box according to claim 3, characterized in that, The battery box also includes a cover plate for covering the weight reduction hole.

5. The battery box according to claim 4, characterized in that, The cover plate is detachably connected to the expansion beam.

6. The battery box according to claim 5, characterized in that, The battery box also includes bolts that secure the cover plate to the expansion beam.

7. The battery box according to claim 6, characterized in that, The cover plate has a countersunk hole on the side opposite to the expansion beam, and the bolt is located in the countersunk hole.

8. The battery box according to any one of claims 1 to 7, characterized in that, The battery box also includes a heat exchange flow path disposed in the box body, the heat exchange flow path being used to exchange heat with the battery cells, and the heat exchange flow path being at least partially disposed within the expansion beam.

9. The battery box according to claim 8, characterized in that, The heat exchange flow path is located outside the receiving cavity.

10. The battery box according to claim 9, characterized in that, The heat exchange flow path also includes a flow channel formed in the main body of the box and an inlet / outlet pipe provided in the main body of the box. The inlet / outlet pipe is connected to the flow channel and is used to supply fluid to enter and exit the flow channel. The inlet / outlet pipe passes through the expansion beam.

11. The battery box according to claim 10, characterized in that, The main body of the box includes a bottom plate and a top plate opposite to the bottom plate. The expansion beam connects the top plate and the bottom plate. The flow channel is formed in the bottom plate. The inlet and outlet pipes and the expansion beam are located between the top plate and the bottom plate. And / or, the inlet / outlet pipe is welded to the base plate and / or the expansion beam.

12. The battery box according to claim 1, characterized in that, The main body of the box includes a top plate, a bottom plate, a first side beam, and two second side beams. In the height direction of the box, the top plate and the bottom plate are arranged opposite each other. In the length direction of the box, the first side beam and the expansion beam are arranged opposite each other. In the width direction of the box, the two second side beams are arranged opposite each other.

13. A battery, characterized in that, Includes the battery box as described in any one of claims 1 to 12.

14. An electrical appliance, characterized in that, Includes the battery as described in claim 13.

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