Openable and closable explosion-proof box for battery pack

Abstract

The battery pack explosion-proof box capable of being opened and closed comprises a box body used for storing a battery pack, and the box body comprises a box main body, a first door body, a stop piece and a telescopic piece. The box main body forms an accommodating cavity for accommodating the battery pack, and a first access port communicated with the accommodating cavity and used for the battery pack to enter and exit is formed in the top; the first door body is arranged on the box body in an up-down rotating mode and used for opening and closing the first inlet and outlet. The stop piece is arranged on the box body, located on the rotating path of the first door body and used for abutting against the first door body. And the telescopic part is rotationally connected with the first door body and the box main body, and extends and rotates to be in a supporting posture when the first door body is opened, so that supporting force for keeping the opened state is provided for the blocked first door body. After the door body at the top of the explosion-proof box for the battery pack is opened, the door body can be stably maintained within a certain opening angle, so that the battery pack can be loaded conveniently.

Description

Technical Field

[0001] The present disclosure relates to the field of explosion-proof boxes, and particularly to an explosion-proof box for a battery pack that can be opened and closed. Background Art

[0002] In the related art, when an abnormal phenomenon occurs in a battery pack, such as overheating or catching fire, the battery pack needs to be placed in an explosion-proof box and transferred away. However, before the battery pack is placed in the explosion-proof box, the door body at the top of the explosion-proof box needs to be manually pulled upwards to rotate, so that the inlet and outlet for the battery pack to enter and exit at the top of the explosion-proof box is opened, and then the battery pack can be loaded into the explosion-proof box. However, during the process of manually pulling the door body to open, the door body is prone to excessive rotation and easy to rotate back after opening, resulting in the inability to stably maintain within a predetermined opening angle after the door body is opened, making it inconvenient to load the battery pack. Summary of the Invention

[0003] An advantage of the present disclosure is to provide an explosion-proof box for a battery pack that can be opened and closed. After the door body at the top of the explosion-proof box for the battery pack is opened, the door body can stably maintain within a certain opening angle, facilitating the loading of the battery pack.

[0004] To achieve at least one of the above advantages of the present disclosure, the present disclosure provides an explosion-proof box for a battery pack that can be opened and closed, including a box body for storing the battery pack. The box body includes: a box main body, forming a receiving cavity for receiving the battery pack, and having a first inlet and outlet formed at the top and communicating with the receiving cavity for the battery pack to enter and exit; a first door body, rotatably provided on the box main body for opening and closing the first inlet and outlet; a stopper, provided on the box main body and located on the rotation path of the first door body for abutting against the first door body; and a telescopic member, rotatably connected to the first door body and the box main body respectively, and extending and rotating into a supporting posture when the first door body is opened to provide a supporting force for maintaining the opened state of the first door body that is abutted.

[0005] According to an embodiment of the present disclosure, the telescopic member includes: a cylinder body, forming a compression cavity and rotatably connected to the box main body; and a telescopic rod, telescopically provided in the cylinder body and rotatably connected to the first door body.

[0006] According to an embodiment of the present disclosure, there are a plurality of the stoppers, and the plurality of stoppers are arranged at intervals along the length direction of the first door body.

[0007] According to an embodiment of the present disclosure, a protruding restricted portion is formed on the upper surface of the first door body, and the stopper forms a stop surface located on the rotation path of the restricted portion to stop the restricted portion.

[0008] According to an embodiment of the present disclosure, the stop surface is located on the top surface of the stopper.

[0009] According to an embodiment of the present disclosure, the stopper forms an avoidance notch on the side facing the first door body, which is adapted to avoid the first door body.

[0010] According to an embodiment of the present disclosure, the stopper surface is inclined or horizontally arranged towards the first door body.

[0011] According to an embodiment of the present disclosure, it further includes: an exhaust valve provided in the box body; and / or a pressure relief valve provided in the box body; and / or a pressure detection member provided in the box body for detecting the pressure in the accommodation cavity.

[0012] According to an embodiment of the present disclosure, the box body forms a fire extinguishing agent inlet and a fire extinguishing agent outlet communicating with the accommodation cavity.

[0013] According to an embodiment of the present disclosure, it further includes: a material level detection element provided in the box body for detecting the fire extinguishing agent level in the accommodation cavity.

[0014] Beneficial effects:

[0015] (1) For the openable and closable battery pack explosion-proof box of the present disclosure, after the door body at the top of the battery pack explosion-proof box is opened, the door body can be stably maintained within a certain opening angle, which is convenient for loading the battery pack.

[0016] (2) The openable and closable battery pack explosion-proof box of the present disclosure can receive abnormal battery packs carried from different directions, can be applicable to different handling scenarios, and has a wide application range.

[0017] (3) For the openable and closable battery pack explosion-proof box of the present disclosure, the auxiliary handle and the main handle can be used by multiple people to cooperate to open the first door body, which is convenient for opening the first door body with a large gravity. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the battery pack explosion-proof box according to an embodiment of the present disclosure at an angle.

[0019] Figure 2 is a schematic structural diagram of the battery pack explosion-proof box when the top is opened according to an embodiment of the present disclosure.

[0020] Figure 3 is a schematic structural diagram of the battery pack explosion-proof box according to an embodiment of the present disclosure at another angle.

[0021] Figure 4 is a schematic structural diagram of the battery pack explosion-proof box when the side is opened according to an embodiment of the present disclosure.

[0022] 10. Box body; 11. Box main body; 12. First door; 121. Restricted part; 13. Second door; 131. First side door; 132. Second side door; 101. Accommodation cavity; 102. First inlet / outlet; 103. Second inlet / outlet;

[0023] 20. Stopper; 201. Stopping surface; 202. Avoidance notch;

[0024] 30. Telescopic member; 31. Cylinder block; 32. Telescopic rod;

[0025] 40. Exhaust valve;

[0026] 50. Pressure relief valve;

[0027] 60. Pressure detection member;

[0028] 70. Material level detection element;

[0029] 81. Main handle; 82. Auxiliary handle;

[0030] 800. Input pipeline; 900. Output pipeline. Detailed implementation manners

[0031] The following description is used to disclose the present disclosure so that those skilled in the art can implement the present disclosure. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present disclosure.

[0032] Those skilled in the art should understand that in the disclosure of the present disclosure, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present disclosure.

[0033] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, and in other embodiments, the number of the element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0034] In the present disclosure, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0035] In the related art, when an abnormal phenomenon occurs in the battery pack, such as overheating or catching fire, the battery pack needs to be placed in an explosion-proof box and transferred away. However, before the battery pack is placed in the explosion-proof box, the door body at the top of the explosion-proof box needs to be manually pulled upwards to rotate, so that the inlet and outlet for the battery pack to enter and exit at the top of the explosion-proof box is opened, and then the battery pack can be loaded into the explosion-proof box. However, during the process of manually pulling the door body to open, the door body is prone to excessive rotation and easy to rotate back after opening. As a result, the door body cannot be stably maintained within a predetermined opening angle after opening, making it inconvenient to load the battery pack.

[0036] In view of this, the embodiments of the present disclosure provide an explosion-proof box for a battery pack. After the door body of the explosion-proof box for the battery pack is opened, the door body can be stably maintained within a certain opening angle, facilitating the loading of the battery pack.

[0037] Figure 1 is a schematic structural diagram of the explosion-proof box for a battery pack according to an embodiment of the present disclosure at an angle. Figure 2 is a schematic structural diagram when the top of the explosion-proof box for a battery pack according to an embodiment of the present disclosure is opened. Refer to Figure 1 and Figure 2 The explosion-proof box for a battery pack includes a box body 10 for storing the battery pack. The box body 10 includes a box main body 11, a first door body 12, a stopper 20, and a telescopic member 30.

[0038] The box main body 11 forms an accommodation cavity 101 for accommodating the battery pack, and a first inlet and outlet 102 communicating with the accommodation cavity 101 and for the battery pack to enter and exit is formed at the top of the box main body 11. The first door body 12 is rotatably provided on the box main body 11 up and down for opening and closing the first inlet and outlet 102. Thus, when the first door body 12 rotates downwards, the first door body 12 gradually approaches the first inlet and outlet 102, thereby closing the first inlet and outlet 102. When the first door body 12 rotates upwards, the first door body 12 gradually moves away from the first inlet and outlet 102, thereby closing the first inlet and outlet 102.

[0039] The stopper 20 is provided on the box body 11, and the stopper 20 is located on the rotation path of the first door 12 for abutting against the first door 12 to limit the opening angle of the first door 12 relative to the first inlet / outlet 102. That is to say, during the process of the first door 12 rotating and opening, the first door 12 will be blocked by the stopper 20 and thus limited, so that the opening angle of the first door 12 can be limited within a predetermined angle.

[0040] Optionally, there are multiple stoppers 20, and the multiple stoppers 20 are arranged at intervals along the length direction of the first door 12. Thus, when the first door 12 is blocked, the multiple stoppers 20 can form multiple blocking points for the first door 12 along the length direction of the first door 12, so as to ensure that the first door 12 can be blocked.

[0041] Figure 3 It is a schematic structural view of the explosion-proof box of the battery pack in the present disclosure embodiment from another angle. Refer to Figure 2 and Figure 3 A protruding restricted portion 121 is formed on the upper surface of the first door 12, and the stopper 20 forms a stop surface 201 located on the rotation path of the restricted portion 121 to block the restricted portion 121. Thus, when the restricted portion 121 is blocked by the stop surface 201, the first door 12 is blocked, and the opening rotation of the first door 12 is restricted.

[0042] Optionally, the stopper 20 is provided on the side portion of the box body 11, and the stop surface 201 is inclined or horizontally arranged towards the first door 12.

[0043] In some examples, when the stop surface 201 is horizontally arranged, the opening angle of the first door 12 can be limited within 90 degrees.

[0044] In other examples, when the stop surface 20 is inclined towards the first door 12, for example, when the stop surface 20 is inclined 5 degrees towards the first door 12, the rotation angle of the first door 12 can be limited within 85 degrees.

[0045] Thus, the rotation angle of the first door 12 can be limited within 90 degrees, avoiding excessive opening rotation of the first door 12 and facilitating subsequent closing of the first door 12.

[0046] Optionally, a relief notch 202 adapted to avoid the first door body 12 is formed on the side of the stopper 20 facing the first door body 12. Thus, when the first door body 12 is rotated and opened, and the restricted portion 121 rotates towards the stopper surface 201, the relief notch 202 can avoid the first door body 12, so as to ensure that the restricted portion 121 can smoothly reach the position where the stopper surface 201 is located and be smoothly stopped by the stopper surface 201.

[0047] The telescopic member 30 is rotatably connected to the first door body 12 and the box main body 11 respectively, and elongates and rotates into a supporting posture when the first door body 12 is opened, so as to provide a supporting force for keeping the opened first door body 12 in an open state.

[0048] Optionally, the telescopic member 30 has elasticity. Thus, when the first door body 12 closes the first inlet / outlet 102, the telescopic member 30 is arranged between the first door body 12 and the box main body 11 in an elastically compressed state. During the process of the first door body 12 rotating upward to be opened, the telescopic member 30 will gradually elongate and rotate under the drive of the first door body 12 and the elastic restoring force until the first door body 12 is stopped by the stopper 20. During the above process, the elastic restoring force can promote the opening of the first door body 12, which plays a role in saving effort for the relevant technicians to open the first door body 12.

[0049] Specifically, the telescopic member 30 includes a cylinder body 31 and a telescopic rod 32. A compression chamber is formed in the cylinder body 31 for accommodating compressed gas, such as nitrogen, and the cylinder body 31 is rotatably connected to the box main body 11. The telescopic rod 32 is telescopically arranged in the cylinder body 31, and the telescopic rod 32 is rotatably connected to the first door body 12.

[0050] Thus, when the first door body 12 closes the first inlet / outlet 102, the telescopic rod 32 is retractably disposed in the cylinder body 31, so that the compressed gas in the cylinder body 31 is highly compressed. During the process of the first door body 12 rotating upward to be opened, the telescopic rod 32 will gradually extend out of the cylinder body 31 and rotate under the drive of the first door body 12 and the restoring force of the compressed gas until the first door body 12 is blocked by the stopper 20. During the above process, the restoring force provided by the compressed gas can promote the opening of the first door body 12, which plays a labor-saving role for the relevant technicians to open the first door body 12. And the telescopic rod 32 and the cylinder body 31 will rotate into a posture capable of supporting the first door body 12. Thus, after the first door body 12 is blocked by the stopper 20, even if the first door body 12 has a tendency to rotate back under the action of gravity, a small accidental thrust or the impact force when being blocked, the restoring force provided by the compressed gas in the cylinder body 31 can offset the above acting forces, so that the first door body 12 is maintained as much as possible at the blocked position or close to the blocked position. For example, when the opening angle of the first door body 12 when being blocked is 90 degrees, and the first door body 12 is supported by the telescopic member 30 and stably maintained in the open state, the opening angle of the first door body 12 can be locked at 85-90 degrees, which is convenient for loading the abnormal battery package into the opened first inlet / outlet 102 and convenient for loading the abnormal battery package.

[0051] In summary, during the process of the first door body 12 rotating and opening, the first door body 12 will be blocked by the stopper 20 and thus limited. And during the above process, the telescopic member 30 will elongate and rotate correspondingly as the first door body 12 rotates, and when the first door body 12 is blocked by the stopper 20, the telescopic member 30 will rotate into a state capable of providing a supporting force for the first door body 12. Thus, after the relevant technicians open the first door body 12 and leave the battery pack explosion-proof box, the cooperation between the stopper 20 and the telescopic member 30 can make the first door body 12 maintain the open state when being blocked or close to the open state when being blocked. Thus, after the first door body 12 of the battery pack explosion-proof box according to the embodiment of the present disclosure is opened, the first door body 12 can be stably maintained within a certain opening angle, which is convenient for loading the battery pack.

[0052] Figure 4 It is a schematic structural view of the side part of the battery pack explosion-proof box according to the embodiment of the present disclosure. Refer to Figure 2 and Figure 4 , the box body 11 forms a second inlet / outlet 103 communicating with the accommodation cavity 101. The opening directions of the first inlet / outlet 102 and the second inlet / outlet 103 are different.

[0053] Thus, when an abnormal battery pack is transported from the direction facing the first inlet / outlet 102, the abnormal battery pack can be placed into the accommodation cavity 101 through the first inlet / outlet 102. When an abnormal battery pack is transported from the direction facing the second inlet / outlet 103, the abnormal battery pack can be placed into the accommodation cavity 101 through the second inlet / outlet 103.

[0054] Optionally, the first inlet / outlet 102 is provided at the top of the box body 11 and opens upward. The second inlet / outlet 103 is provided at the side of the box body 11 and opens toward the outer peripheral side.

[0055] Thus, when an abnormal battery pack is lifted by a crane and transported in a lifted manner, the lifted abnormal battery pack can be placed into the accommodation cavity 101 through the upward-opening first inlet / outlet 102. When an abnormal battery pack is transported by the fork of a forklift, the abnormal battery pack can be transported into the second inlet / outlet 103 and enter the accommodation cavity 101 in a transported manner, so that the battery pack explosion-proof box can receive abnormal battery packs transported from different directions by a crane and a forklift and can be applicable to different handling scenarios.

[0056] Of course, it can be understood that the opening directions of the first inlet / outlet 102 and the second inlet / outlet 103 in the embodiments of the present disclosure include but are not limited to this. For example, the first inlet / outlet 102 and the second inlet / outlet 103 can also be considered to be provided on different side walls of the box body 11 to receive abnormal battery packs from different peripheral sides of the box body 11.

[0057] The closable battery pack explosion-proof box further includes a second door body 13. The second door body 13 is provided at the second inlet / outlet 103 for opening and closing the second inlet / outlet 103, and the opening and closing movements of the first door body 12 and the second door body 13 are independent of each other.

[0058] Thus, since the first door body 12 can correspondingly close and open the first inlet / outlet 102. The second door body 13 can correspondingly open and close the second inlet / outlet 103. And the process of the first door body 12 opening and closing the first inlet / outlet 102 is independent of the process of the second door body 13 opening and closing the second inlet / outlet 103, and the two do not affect each other. Thus, in a handling scenario, such as a lifting and handling scenario, relevant technicians can correspondingly control the first inlet / outlet 102 to open alone. In another handling scenario, such as a forklift handling scenario, relevant technicians can correspondingly control the second inlet / outlet 103 to open alone, so as to be applicable to different handling scenarios.

[0059] Optionally, the second door body 13 is rotatably arranged on the box body 11 towards and away from the second inlet / outlet 103, so as to close the second inlet / outlet 103 by rotating towards the second inlet / outlet 103, and to open the second inlet / outlet 103 by rotating away from the second inlet / outlet 103.

[0060] Specifically, when the second inlet / outlet 103 is open forward or backward, the second door body 13 is rotatably arranged on the box body 11 in the front-back direction, so as to open and close the first inlet / outlet 102 by rotating in the front-back direction. When the second inlet / outlet 103 is open leftward or rightward, the second door body 13 is rotatably arranged on the box body 11 in the left-right direction, so as to open and close the second inlet / outlet 103 by rotating in the left-right direction.

[0061] Optionally, the second door body 13 can be a single-leaf door or a double-leaf door. Refer to Figure 4 , when the second door body 13 is a double-leaf door, the second door body 13 includes a first side door 131 and a second side door 132. The first side door 131 and the second side door 132 are rotatably arranged on opposite sides of the second inlet / outlet 103, and the first side door 131 and the second side door 132 are used to cooperate to close the second inlet / outlet 103. Thus, when opening the second inlet / outlet 103, the second door body 13 of the double-leaf door occupies a small external operation space, which is convenient for relevant technical personnel to open the second inlet / outlet 103.

[0062] Optionally, refer to Figure 1 , the battery pack explosion-proof box further includes an exhaust valve 40. The exhaust valve 40 is arranged on the box body 10. Thus, the gas in the box body 10 can be discharged to the external environment outside the box body 10 through the exhaust valve 40, playing a role in preventing the pressure in the box body 10 from being too high.

[0063] Optionally, refer to Figure 1 , the battery pack explosion-proof box further includes a pressure relief valve 50. The pressure relief valve 50 is arranged on the box body 10. Thus, when the pressure in the box body 10 is too high, for example, when an abnormal battery pack catches fire in the box body 10, causing the pressure in the box body 10 to increase sharply, the pressure relief valve 50 can be forced to open automatically by the gas in the box body 10, so that the air pressure in the box body 10 can be quickly reduced, thereby avoiding damage to the battery pack explosion-proof box due to excessive internal pressure.

[0064] Optionally, refer to Figure 1, the battery pack explosion-proof box further includes a pressure detection member 60. The pressure detection member 60, such as a pressure gauge or a pressure sensor, etc., is provided on the box body 10 for detecting the pressure in the accommodation cavity 101. Thus, relevant technicians can determine the internal pressure of the box body 10 according to the detection result of the pressure detection member 60, which is convenient for timely understanding the pressure condition in the box body 10.

[0065] Optionally, referring to Figure 1 and Figure 2 , the box body 10 forms a fire extinguishing agent inlet communicating with the accommodation cavity 101. The fire extinguishing agent inlet is connected to an input pipeline 800 for receiving the fire extinguishing agent conveyed by the input pipeline 800. The box body 10 forms a fire extinguishing agent outlet communicating with the accommodation cavity 101. The fire extinguishing agent outlet is connected to an output pipeline 900 for outputting the fire extinguishing agent to the output pipeline 900. Thus, when the on-fire battery pack is placed inside the box body 10, by introducing the fire extinguishing agent into the fire extinguishing agent inlet, the fire extinguishing agent enters the accommodation cavity 101 containing the on-fire battery pack and is then exported through the fire extinguishing agent outlet. For example, by introducing water or lime into the fire extinguishing agent inlet, the water or lime enters the accommodation cavity 101 containing the on-fire battery pack and is then exported through the fire extinguishing agent outlet, thereby extinguishing the on-fire battery pack.

[0066] Optionally, referring to Figure 2 , the battery pack explosion-proof box further includes a material level detection element 70. The material level detection element 70 is provided on the box body 10 for detecting the fire extinguishing agent material level. Thus, relevant technicians can detect the fire extinguishing agent material level through the material level detection element 70, thereby determining whether the fire extinguishing agent in the box body 10 reaches a predetermined material level, and can avoid waste caused by introducing too much of the fire extinguishing agent.

[0067] The material level detection member can be a liquid level sensor or a liquid level viewer. The liquid level sensor or the liquid level viewer is provided on the box body 10 for detecting the water level in the box body 10. The material level detection member can also be a material level sensor. The material level sensor is provided on the box body 10 for detecting the lime material level in the box body 10. Thus, relevant technicians can determine whether the fire extinguishing agent in the box body 10, such as water or lime, reaches a predetermined height by detecting the material level of the fire extinguishing agent in the box body 10, and can avoid waste caused by introducing too much water into the box body 10.

[0068] Optionally, referring to Figure 1, the battery pack explosion-proof box further includes a main handle 81 and at least one auxiliary handle 82. The main handle 81 is provided on the first door body 12. The auxiliary handle 82 is provided on the first door body 12, and the lowest height of the auxiliary handle 82 is greater than the lowest height of the main handle 81. Specifically, the main handle 81 is arranged parallel to the vertical plane, the auxiliary handle 82 is arranged parallel to the horizontal plane and is located at the top of the main handle 81, so that the lowest height of the main handle 81 is less than that of the auxiliary handle 82.

[0069] Thus, when the first door body 12 is rotated downward to close the first inlet and outlet 102, a person skilled in the art can first pull down the main handle 81 of the box body 10 placed at a predetermined height, so that the first door body 12 is rotated downward by a certain angle. After the first door body 12 is rotated downward by a certain angle, other persons can pull down the auxiliary handle 82 to assist the person pulling the main handle 81 to continue pulling down the first door body 12, so as to completely close the first inlet and outlet 102 by the first door body 12. When the first door body 12 is rotated upward to open the first inlet and outlet 102, a person skilled in the art can first push up the main handle 81 of the box body 10 placed at a predetermined height, so that the first door body 12 is rotated upward by a certain angle, which is convenient for the subsequent complete opening of the first door body 12. Thus, due to the existence of the main handle 81 and the auxiliary handle 82, even if the first door body 12 has a large gravity, a person can smoothly open or close the first door body 12 manually.

[0070] Those skilled in the art should understand that the embodiments of the present disclosure described above and shown in the drawings are only examples and do not limit the present disclosure. The advantages of the present disclosure have been fully and effectively realized. The functions and structural principles of the present disclosure have been shown and described in the embodiments. Without departing from the principle, the embodiments of the present disclosure can have any deformation or modification.

Claims

1. An openable and closable explosion-proof box for battery packs, characterized in that: A box for storing a battery pack is included, the box comprising: The box body forms a receiving cavity for receiving the battery pack, and the top forms a first inlet and outlet communicating with the receiving cavity and allowing the battery pack to enter and exit; A first door body is rotatably disposed on the box body and is used to open and close the first inlet and outlet; a stopper, provided on the box body and located on the rotation path of the first door body, and used for abutting against the first door body; and The telescopic member is rotatably connected to the first door body and the box body respectively, and is extended and rotated into a supporting posture when the first door body is opened, so as to provide a supporting force for the blocked first door body to maintain an open state.

2. The openable and closable explosion-proof box for battery pack according to claim 1, characterized in that: The telescopic member comprises: a cylinder body, forming a compression chamber and rotatably connected to the box body; and The telescopic rod is telescopically arranged in the cylinder body and is rotatably connected to the first door body.

3. The openable and closable explosion-proof box for battery pack according to claim 1, characterized in that: There are multiple stoppers, and the multiple stoppers are arranged at intervals along the length direction of the first door body.

4. The openable and closable explosion-proof box for battery pack according to claim 1, characterized in that: A protruding limiting portion is formed on the upper surface of the first door body, and the stopper forms a stopping surface located on the rotation path of the limiting portion to stop the limiting portion.

5. The openable and closable explosion-proof box for battery pack according to claim 4, characterized in that: The stop surface is located on the top surface of the stop member.

6. The openable and closable explosion-proof box for battery pack according to claim 4, characterized in that: The stopper forms a relief gap toward the side of the first door body, which is suitable for avoiding the first door body.

7. The openable and closable explosion-proof box for battery pack according to claim 4, characterized in that: The stop surface is arranged obliquely or horizontally toward the first door body.

8. The openable and closable explosion-proof box for battery pack according to claim 1, characterized in that: Also includes: an exhaust valve, disposed in the housing; and / or a pressure relief valve, disposed in the tank; and / or The pressure detection component is arranged in the box body and is used to detect the pressure in the accommodating cavity.

9. The openable and closable explosion-proof box for battery pack according to claim 1, characterized in that: The box body forms a fire extinguishing agent inlet and a fire extinguishing agent outlet which are communicated with the accommodating chamber.

10. The openable and closable explosion-proof box for battery pack according to claim 9, characterized in that: Also includes: The material level detection element is arranged in the box body and is used to detect the fire extinguishing agent material level in the containing cavity.

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