Battery box and battery pack

Abstract

The application provides a battery box and a battery pack. The battery box comprises a bottom plate and a side wall. The side wall and the bottom plate enclose a space for accommodating batteries and / or electrical components. The battery box further comprises a lifting column integrally formed with the side wall, and a fixed sealing block sleeved on the lifting column. The bottom plate is located between the side wall and the fixed sealing block. The side wall is fixedly connected with the bottom plate through the fixed sealing block. A first sealing member is arranged between the fixed sealing block and the bottom plate to seal the gap between the fixed sealing block and the bottom plate. The fixed sealing block is sealingly connected with the lifting column. In the above technical solution, the fixed sealing block and the bottom plate are respectively sealed by the first sealing member and the second sealing member. On the one hand, the sealing effect can be improved. On the other hand, the fixed sealing block is a separate component, which is convenient to disassemble and assemble. If the first sealing member or the second sealing member fails, the fixed sealing block only needs to be disassembled to replace the new sealing member. The maintenance of the entire battery box is facilitated.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery box and battery pack. Background Technology

[0002] As a crucial component of electric vehicles, the battery pack's sealing performance has a vital impact on battery safety. Currently, during battery assembly, to better securely connect the battery pack to the vehicle, a through-type suspension assembly is typically used to suspend the battery pack onto the vehicle's floor. However, current suspension assemblies cannot meet the requirements for ensuring the battery pack's sealing. Summary of the Invention

[0003] This application provides a battery box and battery pack to improve the sealing effect of the battery box.

[0004] In a first aspect, this application provides a battery box, which includes a bottom plate and side walls; wherein the side walls and the bottom plate and the side walls enclose a space for accommodating batteries and / or electrical components.

[0005] It also includes a hanging column integrally formed with the side wall, and a fixing sealing block sleeved on the hanging column; wherein,

[0006] The base plate is located between the side wall and the fixed sealing block;

[0007] The sidewall is fixedly connected to the base plate via the fixed sealing block;

[0008] A first sealing element for sealing the gap between the fixed sealing block and the base plate is provided between the fixed sealing block and the base plate;

[0009] The fixed sealing block is sealed to the hanging column.

[0010] In the above technical solution, the fixed sealing block is sealed to the hanging column and the base plate by the first and second sealing elements, respectively, which improves the sealing effect. Furthermore, the fixed sealing block is a separate component, making it easy to disassemble and assemble. If the first or second sealing element fails, only the fixed sealing block needs to be disassembled to replace it with a new one. This facilitates the maintenance of the entire battery box.

[0011] In a second aspect, a battery pack is provided, which includes a battery box as described in any of the above claims and a battery fixed inside the battery box.

[0012] In the above technical solution, the fixed sealing block is sealed to the hanging column and the base plate by the first and second sealing elements, respectively, which improves the sealing effect. Furthermore, the fixed sealing block is a separate component, making it easy to disassemble and assemble. If the first or second sealing element fails, only the fixed sealing block needs to be disassembled to replace it with a new one. This facilitates the maintenance of the entire battery box. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the battery box provided in an embodiment of this application;

[0014] Figure 2 An exploded view of the battery box provided in an embodiment of this application;

[0015] Figure 3 This is a schematic diagram of the structure of the gasket body provided in the embodiments of this application;

[0016] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0017] Figure 5 This is a schematic diagram of the structure of the fixed sealing block provided in the embodiments of this application;

[0018] Figure 6 This is a cross-sectional view of the fixed sealing block provided in an embodiment of this application.

[0019] Figure label:

[0020] 100-Battery Box 10-Box Body 11-Side Beam 111-Hanging Column

[0021] 1111-First cylinder 1112-Second cylinder 1113-Second hole 1114-First hole

[0022] 112 - Third fastener; 113 - Second fastener; 114 - Fixed sealing block

[0023] 1141-Body body; 11411-Step structure; 1142-Lifting lug; 1143-Third seal.

[0024] 1144 - First seal; 1145 - Second seal; 115 - First fastener

[0025] 116-Fourth seal 117-Fifth seal 12-Bottom plate 13-Bottom protective plate 20-Box cover Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0028] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0029] To facilitate understanding of the battery box provided in this application embodiment, its application scenario is first described. The battery box provided in this application embodiment is used in a battery pack to carry the battery. Additionally, the battery box also serves as a load-bearing structure when the battery pack is assembled on a vehicle or other equipment and hoisted. Current battery boxes have poor structural sealing. Therefore, this application embodiment provides a battery box, which will be described in detail below with reference to specific drawings and embodiments.

[0030] refer to Figure 1 , Figure 1 A schematic diagram of the structure of a battery box 100 provided in an embodiment of this application is shown. The main structure of the battery box 100 provided in this application embodiment includes a box body 10 and a box cover 20 that covers the box body 10. When engaged, the box cover 20 is fastened to the box body 10 and forms a space for accommodating batteries. It should be understood that in Figure 1 The example illustrates a specific structural form of the battery box 100, but the specific structural forms of the cover 20 and body 10 of the battery box 100 are not specifically limited in this embodiment. The shapes of the cover 20 and body 10 of the battery box 100 can be adjusted as needed.

[0031] It should be understood that the cover 20 is an optional structure and can be set as needed in this embodiment. When the battery box 100 includes the cover 20, the box body 10 is provided with a corresponding structure to cooperate with it. When the battery box 100 does not include the cover 20, the box body 10 can correspondingly omit the structure to cooperate with the cover 20.

[0032] Please refer to the above. Figure 2 , Figure 2 An exploded view of the battery box body is shown. The battery box 100 body 10 mainly includes side walls and a base plate 12 connected to the side walls. The side walls are disposed on and fixedly connected to the base plate 12 to form a box structure for accommodating batteries and / or electrical components. Figure 1 Only two opposing side beams 11 are shown in the figure, but it should be understood that in the embodiments of the application, side beams 11 may be provided on all four periphery of the base plate 12 to form a space for accommodating batteries and / or electrical components.

[0033] In this embodiment, the base plate 12 can be a metal plate that only provides support. Alternatively, it can be a liquid-cooled plate that dissipates heat from the battery. When using a liquid-cooled plate, liquid-cooling pipes are embedded within it, through which heat is dissipated from the battery.

[0034] As an optional solution, the battery box 100 provided in this embodiment may further include a bottom protective plate 13, which is used to improve the safety of the battery box 100 and reduce the risk of collision. Exemplarily, the bottom protective plate 13 is stacked with the bottom plate 12, and the bottom protective plate 13 is located on the side of the bottom plate 12 facing away from the side beam 11. The bottom protective plate 13 may be made of a material with certain structural strength. Exemplarily, the bottom protective plate 13 may be made of metal. For example, the bottom protective plate 13 may be made of different materials such as steel, iron, or aluminum.

[0035] When the battery box 100 is installed on the vehicle, it is suspended from the vehicle's chassis. The underbody protection plate 13 is located on the outermost side of the battery box 100. If the chassis is scraped or a foreign object bounces up and hits the battery box 100 while the vehicle is in motion, the outermost underbody protection plate 13 can protect the battery box 100 and reduce the risk of damage to the battery box 100.

[0036] Please refer to the above. Figure 3 and Figure 4 , Figure 3 A structural diagram showing the connection between the base plate and the side wall is shown. Figure 4 It shows Figure 3 An enlarged schematic diagram at point A is shown. The side wall of the embodiment provided in this application is provided with a hanging column 111, which is integrally formed with the side wall and embedded within it. When installing the hanging column 111, the side wall where the hanging column 111 is located can be a side beam 11 of the housing 10, or a middle beam of the housing 10, or other different structures. For ease of description, the structure of the battery box 100 provided in this embodiment is illustrated using the hanging structure on the side beam 11 as an example.

[0037] The aforementioned hanging column 111 serves as a structure for connecting to the base plate 12 on one hand, and as a structure for connecting to the box cover 20 on the other hand.

[0038] When specifically setting up the hanging column 111, its length direction is along the height direction of the side beam 11. During manufacturing, the hanging column 111 can be integrally formed with the side beam 11 during casting. By integrally forming the hanging column 111 with the side beam 11, the forming process is simple, and there is no need to install the hanging column 111 separately, which facilitates the installation of the entire battery box 100.

[0039] It should be understood that the number of hanging columns 111 provided in this application embodiment can be set differently as needed. For example, the number of hanging columns 111 can be two, three, four, or other different numbers. In specific settings, the number of hanging columns 111 can be set as needed. However, regardless of how many hanging columns 111 are set, the structure of all hanging columns 111 is the same. Therefore, the description will be based on one hanging column 111 as an example.

[0040] The mounting post 111 is used to pass through bolts for suspending the battery box 100 to the chassis of the vehicle. The overall structure of the mounting post 111 is a cylindrical structure with openings at both ends. During assembly, fasteners are inserted into the mounting post 111 through one opening away from the chassis, and the ends of the fasteners protrude from the other opening and are threaded to the chassis to secure the battery box 100 to the chassis of the vehicle.

[0041] When installing the hanging column 111, the height of the hanging column 111 is greater than the height of the side beam 11, and the top of the hanging column 111 is flush with or slightly lower than the top surface of the side beam 11, while the bottom of the hanging column 111 protrudes outward from the bottom surface of the side beam 11. Here, the top surface of the side beam 11 refers to the surface where the side beam 11 fits against the box cover 20, and the bottom surface of the side beam 11 refers to the surface where the side beam 11 fits against the base plate 12. For ease of description, the end of the hanging column 111 closest to the top surface of the side beam 11 is named the first end of the hanging column 111, and the opposite end is named the second end of the hanging column 111.

[0042] When the base plate 12 is connected to the side beam 11, the base plate 12 is provided with a through hole to accommodate the second end of the hanging column 111. During assembly, the second end of the hanging column 111 passes through the base plate 12 and is exposed on the side of the base plate 12 away from the side beam 11.

[0043] The battery box 100 provided in this embodiment of the application further includes a fixing sealing block 114, which is used to seal the gap between the bottom plate 12 and the side beam 11. When the fixing sealing block 114 is installed, it is sleeved on the hanging column 111 and presses the bottom plate 12 against the side beam 11 for fixation.

[0044] Please refer to the above. Figure 5 and Figure 6 , Figure 5 A schematic diagram of the fixed sealing block is shown. Figure 6A cross-sectional view of the fixed sealing block is shown. When assembling the fixed sealing block 114, it is fitted onto the second end of the hanging column 111, and a sealing connection is formed between the fixed sealing block 114 and the hanging column 111. Specifically, a second sealing element 1145 is provided between the fixed sealing block 114 and the hanging column 111 to seal the gap between them. The second sealing element 1145 can be a sealing sleeve, such as an O-ring. A groove is provided on the fixed sealing block 114, and the second sealing element 1145 is disposed within the groove. For example, when the second sealing element 1145 is provided, the fixed sealing block 114 has a through hole (not shown) that can be fitted onto the hanging column 111, and a groove (not shown) is formed on the inner wall of the through hole, into which the second sealing element 1145 can be engaged. When assembling the second seal 1145, part of the second seal 1145 is exposed outside the groove to ensure that when the second seal 1145 is assembled with the hanging column 111, it can have sufficient deformation to seal and fix the gap between the sealing block 114 and the hanging column 111 structure.

[0045] Please refer to the above. Figure 4 and Figure 5 When the fixed sealing block 114 is fitted onto the base plate 12, it presses the base plate 12 against the side beam 11, thereby positioning the base plate 12 between the side beam 11 and the fixed sealing block 114.

[0046] When the side beam 11 is connected to the base plate 12, the side beam 11 is fixedly connected to the base plate 12 via a fixing sealing block 114. Specifically, the battery box 100 also includes a first fastener 115, which passes through the fixing sealing block 114 and the base plate 12, and is fixedly connected to the side beam 11. For example, the side beam 11 is provided with a threaded hole, and the first fastener 115 passes through the fixing sealing block 114 and is threadedly connected to the threaded hole on the side beam 11. Thus, the fixing sealing block 114, the base plate 12, and the side beam 11 are locked and fixed by the first fastener 115.

[0047] As an optional solution, the fixed sealing block 114 includes a body 1141 and a lifting lug 1142 connected to the body 1141. In this embodiment, there are two lifting lugs 1142, which are arranged on opposite sides of the body 1141. The first fastener 115 passes through the lifting lug 1142 and the base plate 12 in sequence, and is threadedly connected to the threaded hole on the side beam 11.

[0048] It should be understood that the number of lugs 1142 is not specifically limited in the embodiments of this application, and the number of lugs 1142 can be any number, such as three or four.

[0049] As an alternative, the hole on the fixed sealing block 114 for the first fastener 115 to pass through is a countersunk hole, so as to accommodate the nut of the first fastener 115 and reduce the outward protrusion of the first fastener 115.

[0050] When the fixed sealing block 114 is installed, a first sealing element 1144 is provided between the fixed sealing block 114 and the base plate 12 to seal the gap between the fixed sealing block 114 and the base plate 12. For example, the first sealing element 1144 can be an O-ring. The first sealing element 1144 is located on the side of the fixed sealing block 114 facing the base plate 12. During assembly, the first sealing element 1144 can be fixed to the fixed sealing block 114 by adhesive bonding, and the first sealing element 1144 is fitted onto the second end of the hanging column 111. When the fixed sealing block 114 is fixedly connected to the side beam 11 by the first fastener 115, the first sealing element 1144 is compressed and undergoes elastic deformation, sealing the gap between the fixed sealing block 114 and the base plate 12.

[0051] As an optional solution, the first seal 1144 is also used to seal the gap between the hanging column 111 and the fixed sealing block 114. For example, when the first seal 1144 is squeezed by the fixed sealing block 114, the first seal 1144 undergoes elastic deformation in the circumferential direction, and the through-hole size of the first seal 1144 decreases, thereby sealing the gap between the fixed sealing block 114 and the hanging column 111.

[0052] As can be seen from the above description, when the fixed sealing block 114 is set, the first sealing element 1144 and the second sealing element 1145 respectively seal the fixed sealing block 114 with the hanging column 111 and the base plate 12, which improves the sealing effect. Furthermore, the fixed sealing block 114 is a separate component, making it easy to disassemble and assemble. If the first sealing element 1144 or the second sealing element 1145 fails, only the fixed sealing block 114 needs to be disassembled to replace it with a new one. This facilitates the maintenance of the entire battery box 100.

[0053] As an optional solution, to improve the sealing effect, a groove is provided on the side beam 11. The groove is located on the side of the side beam 11 facing the bottom plate 12, and the opening of the groove faces the bottom plate 12. The fourth seal 116 is located in the groove and partially exposed outside the groove. When the first fastener 115 is screwed into the threaded hole, the fourth seal 116 is compressed, sealing the gap between the side beam 11 and the bottom plate 12.

[0054] When the battery box 100 includes a bottom cover plate 13, a fixing sealing block 114 is located between the bottom plate 12 and the bottom cover plate 13. During assembly, the bottom cover plate 13 is fixedly connected to the lifting column 111 by a second fastener 113. Exemplarily, the inner wall of the second end of the lifting column 111 is provided with an internal thread. The battery box 100 also includes a second fastener 113, which is connected to the internal thread of the second end of the lifting column 111, and presses the bottom cover plate 13 against the fixing sealing block 114. It should be understood that the second fastener 113 has a through hole to ensure that when the second fastener 113 is threadedly connected to the lifting column 111, the fastener used to lift the battery box 100 can pass through the second fastener 113 and be inserted into the lifting column 111.

[0055] As an optional solution, a third sealing element 1143 is provided between the bottom protective plate 13 and the fixed sealing block 114 for sealing the space between them. For example, the side of the fixed sealing block 114 facing the bottom protective plate 13 has a stepped structure 11411; the third sealing element 1143 is fitted onto the stepped structure 11411. During assembly, the third sealing element 1143 is an O-ring gasket, and the stepped structure 11411 is disposed on the body 1141 of the fixed sealing block 114, with the stepped structure 11411 located on the side of the fixed sealing block 114 facing away from the bottom plate 12.

[0056] When assembling the third seal 1143, the third seal 1143 is fitted onto the stepped structure 11411, and a portion of the third seal 1143 protrudes outward from the stepped structure 11411. That is, during assembly, the third seal 1143 wraps around the stepped structure 11411 in the height direction. When the bottom guard plate 13 is connected to the side beam 11, the third seal 1143 is compressed and deformed, thereby sealing the gap between the fixed sealing block 114 and the bottom guard plate 13. The stepped structure 11411 limits the deformation of the third seal 1143, preventing it from being excessively compressed and failing.

[0057] As an optional solution, when setting the stepped structure 11411, the stepped surface of the stepped structure 11411 is lower than the size of the nut of the first fastener 115 exposed on the fixed sealing block 114 along the height direction. This is to avoid the exposed nut pressing against the bottom guard plate 13, which would result in a smaller amount of compression deformation of the third sealing element 1143 and affect the sealing effect.

[0058] As an alternative, the fixed sealing block 114 provided in this application embodiment may not have a stepped structure, and the amount of compression deformation of the third seal 1143 may be limited by the portion of the first fastener 115 exposed outside the fixed sealing block 114.

[0059] The cover 20 is structurally connected to the hanger 111 via a third fastener 112 to secure the cover 20 to the housing 10. Exemplarily, the second end of the hanger 111 has an internal thread, and the third fastener 112 passes through the cover 20 and is threadedly connected to the internal thread of the hanger 111 to secure the cover 20 to the side wall. Furthermore, it should be understood that the structure of the third fastener 112 is similar to that of the second fastener 113, also having a through hole that allows fasteners for lifting the battery box to pass through, ensuring that the battery box 100 can be lifted onto the vehicle chassis.

[0060] The box cover 20, which is fitted onto the side wall, is sealed to the hanging column 111. For example, the first end of the hanging column 111 is provided with a fifth sealing element 117. The end face of the first end of the hanging column 111 is provided with a groove. The fifth sealing element 117 is fitted into the groove and can be partially exposed outside the hanging column 111. When the box cover 20 is fixed, the box cover 20 presses against the side beam 11. When the box cover 20 is fixedly connected to the hanging column 111 by the third fastener 112, the fifth sealing element 117 is squeezed and deformed, sealing the gap between the box cover 20 and the hanging column 111.

[0061] When the hanging column 111 is installed, the hanging column 111 has a cylindrical structure. For example, the hanging column 111 has a stepped hole for passing a bolt through it, and the stepped surface of the stepped hole is used to press against the nut of the bolt. Among them, the smaller diameter hole in the stepped hole is farther away from the bottom plate, and the larger diameter hole is closer to the bottom plate.

[0062] In addition, to improve the structural strength of the connection between the fastener and the hanging column 111, the hanging column 111 adopts a stepped structure. For example, the hanging column 111 includes a first cylindrical body 1111 and a second cylindrical body 1112 fixedly connected; the diameter of the first cylindrical body 1111 is larger than the diameter of the second cylindrical body 1112; wherein the first cylindrical body 1111 is closer to the bottom plate 12, and the second cylindrical body 1112 is closer to the box cover 20. For example, when fixing the bottom protective plate 13, the second fastener 113 is threadedly connected to the first cylindrical body 1111; when fixing the box cover, the third fastener 112 is threadedly connected to the second cylindrical body 1112.

[0063] Additionally, the stepped hole includes a first hole 1114 and a second hole 1113 that are connected; the diameter of the first hole 1114 is larger than the diameter of the second hole 1113; the first hole 1114 is located inside the first cylinder 1111, and the second hole 1113 is partially located in the first cylinder 1111 and partially located in the second cylinder 1112. For example, the length of the first hole 1114 is less than the length of the first cylinder 1111, and the length of the second hole 1113 is greater than the length of the second cylinder 1112. This allows the fasteners to be closer to the cover 20 when assembled inside the hanging column 111, improving the torque borne by the battery box 100 and enhancing the structural strength of the hanging column 111, thereby increasing the stability of the battery box 100.

[0064] For example, as an optional solution, the length of the step surface from the base plate is 1 / 3 to 2 / 3 of the length of the hanging column 111. Different proportions, such as 1 / 3, 1 / 2, and 2 / 3 of the length of the hanging column 111, can be used. This results in higher structural strength for the hanging column while reducing the torque borne by the battery box during hoisting.

[0065] It should be understood that the fasteners mentioned above can be common fasteners such as bolts and screws. In the embodiments of this application, bolts or screws can be selected according to the forces acting on each structure in the battery box.

[0066] This application embodiment also provides a battery pack, which includes the battery box 100 of any of the above-mentioned embodiments and batteries fixed inside the battery box 100. In the above technical solution, the fixing sealing block 114 is sealed to the hanging column 111 and the base plate 12 by the first sealing member 1144 and the second sealing member 1145 respectively, which can improve the sealing effect. On the other hand, the fixing sealing block 114 is a separate component, which is easy to disassemble and assemble. If the first sealing member 1144 or the second sealing member 1145 fails, only the fixing sealing block 114 needs to be disassembled to replace the new sealing member. This facilitates the maintenance of the entire battery box 100.

[0067] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0069] The present application has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present application based on these embodiments, all of which fall within the protection scope of the present application.

Claims

1. A battery box, characterized in that, It includes a base plate and side walls; wherein the side walls, the base plate, and the side walls enclose a space for accommodating batteries and / or electrical components; It also includes a hanging column integrally formed with the side wall, and a fixing sealing block sleeved on the hanging column; wherein, the base plate is located between the side wall and the fixing sealing block; The sidewall is fixedly connected to the base plate via the fixed sealing block; A first sealing element for sealing the gap between the fixed sealing block and the base plate is provided between the fixed sealing block and the base plate; The fixed sealing block is sealed to the hanging column; A second sealing element is provided between the fixed sealing block and the hanging column to seal the gap between the fixed sealing block and the hanging column; It also includes a first fastener, which passes through the fixed sealing block and the base plate and is fixedly connected to the side wall; It also includes a fourth seal, which is used to seal the gap between the sidewall and the bottom plate.

2. The battery box according to claim 1, characterized in that, The fixed sealing block is provided with a groove, and the second sealing element is disposed in the groove.

3. The battery box according to claim 1, characterized in that, It also includes a bottom protective plate; the bottom protective plate is stacked with the bottom plate, and the bottom protective plate is located on the side of the bottom plate away from the side wall; A third sealing element is provided between the bottom protective plate and the fixed sealing block to seal the gap between the bottom protective plate and the fixed sealing block.

4. The battery box according to claim 3, characterized in that, The fixed sealing block has a stepped structure on the side facing the bottom protective plate; the third sealing element is fitted onto the stepped structure.

5. The battery box according to any one of claims 1 to 4, characterized in that, The lifting column has a stepped hole for inserting a bolt, and the stepped surface of the stepped hole is used to press against the nut of the bolt.

6. The battery box according to claim 5, characterized in that, The suspension column includes a first cylindrical body and a second cylindrical body that are fixedly connected; the diameter of the first cylindrical body is larger than the diameter of the second cylindrical body. The stepped hole includes a first hole and a second hole that are connected; the diameter of the first hole is larger than the diameter of the second hole; The first cylindrical body is located near the bottom plate; The first hole is located inside the first cylinder; The second hole is located in the first cylinder and in the second cylinder.

7. The battery box according to claim 5, characterized in that, The distance between the step surface and the base plate is 1 / 3 to 2 / 3 of the length of the hanging column.

8. The battery box according to claim 6, characterized in that, When the battery box includes a bottom protective plate, the battery box also includes a second fastener; the second fastener is threadedly connected to the first cylindrical body and is used to fix the bottom protective plate to the hanging column.

9. A battery pack, characterized in that, It includes the battery box as described in any one of claims 1 to 8 and the battery fixed inside the battery box.

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