Battery box and electric vehicle

Abstract

The application discloses a battery box and an electric vehicle, and relates to the technical field of battery boxes, and in particular relates to a battery box and an electric vehicle. The battery box comprises a box body, at least one side wall of the box body is embedded with a pipeline, or the inner side or the outer side of at least one side wall of the box body is provided with a pipeline, and the pipeline is communicated with an external pipeline to enable fluid medium to flow in the pipeline. The battery box of the application is characterized in that the pipeline is arranged in the inner side of the side wall of the box body or the outer side of the side wall, and the pipeline is communicated with the external pipeline, so that the fluid medium can flow in the pipeline, and the heat in the box body and the heat of the fluid medium can be exchanged, thereby facilitating the control of the heat in the box body within a suitable range and the improvement of the service life of the battery box. Since the pipeline is arranged in the inner side of the side wall of the box body or the outer side of the side wall, the leakage or seepage of the fluid medium will not cause adverse effects on the battery of the box body, and short circuit caused by the fluid medium can be avoided.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle equipment, and particularly to a battery box and an electric vehicle. Background Technology

[0002] Currently, electric vehicles primarily acquire energy through two methods: charging and battery swapping. Battery swapping enables rapid energy replenishment, reducing customer waiting time and improving the utilization rate of swapping stations. Furthermore, it allows for centralized charging of batteries at night, achieving "peak shaving and energy storage" for power loads. Simultaneously, it improves the overall utilization efficiency of power equipment and extends battery life, making it highly valuable for widespread application and economically significant.

[0003] In electric vehicles, cooling pipes installed inside the battery pack are connected to the vehicle's cooling system, using the circulation of coolant to achieve thermal balance within the battery pack. However, because these cooling pipes are located inside the battery pack, a breakage or leak in one of these pipes could potentially cause a short circuit in the battery pack, leading to accidents such as fires. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art where leakage of liquid cooling pipes easily leads to battery box failure, and to provide a battery box and an electric vehicle.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A battery box includes a box body, at least one side wall of the box body is embedded with a pipe, or at least one side wall of the box body is provided with a pipe on the inner or outer side, the pipe being connected to an external pipe for a fluid medium to flow within the pipe.

[0007] In this design, by employing the above structure, the piping is located inside or outside the side wall of the enclosure and connected to external pipes. This allows the fluid medium to flow through the piping, enabling heat exchange between the enclosure and the fluid medium. This helps control the heat within the enclosure within a suitable range, thus extending the battery box's lifespan. Because the piping is located inside or outside the side wall, leaks or seepage of the fluid medium will not adversely affect the batteries in the enclosure and will not cause short circuits due to the fluid medium.

[0008] Preferably, an accommodating space is formed within the side wall of the enclosure, and the pipeline is disposed within the accommodating space.

[0009] In this solution, by adopting the above structure and setting up an accommodating space in the side wall, it is beneficial to avoid damage to the pipeline by external forces, reduce the risk of pipeline breakage, improve the safety of the pipeline, and thus improve the safety of the battery box.

[0010] Preferably, the pipes inside the side wall of the housing are integrally cast with the side wall.

[0011] In this solution, by adopting the above structure, it is beneficial to cast the pipeline and box in one piece, which simplifies the design and manufacturing of the battery box and improves the reliability of the battery box.

[0012] Preferably, the outer side of the sidewall of the housing has an outwardly protruding portion, and an accommodating space is formed within the protruding portion; or, the inner side of the sidewall of the housing has an outwardly protruding portion, and an accommodating space is formed within the protruding portion; the pipeline is disposed within the accommodating space.

[0013] In this solution, by adopting the above structure and providing an accommodating space within the protrusion, the thickness of the sidewall only needs to be increased at the location where the protrusion is located, thereby reducing the thickness of the sidewall at other locations. This helps to reduce the average thickness of the sidewall, which in turn helps to reduce the total weight of the sidewall and consequently, the total weight of the battery box.

[0014] Preferably, the pipe is embedded inside the lower side wall of the housing, or the pipe is located on the inner or outer side of the lower side wall of the housing.

[0015] In this solution, by adopting the above structure, the pipeline is set inside the lower side wall or on the inner or outer side of the lower side wall. Even if the fluid medium leaks, it will flow directly out of the battery box under the action of gravity. This helps to avoid the fluid medium from causing adverse effects on the battery in the box and will not cause short circuits due to the fluid medium, thus improving the safety of the battery box.

[0016] Preferably, the battery box further includes a pipe connector, which is disposed on the side wall of the battery box. The two ends of the pipe are respectively connected to the pipe connector, and the pipe is connected to the external pipe through the pipe connector.

[0017] In this solution, by adopting the above structure and utilizing pipe joints, the efficiency, stability, and safety of the connection between the battery box's pipes and external pipes are improved.

[0018] Preferably, the pipe joint includes a check valve that can be opened or closed to connect or disconnect the pipe from the external pipe.

[0019] In this design, by adopting the above structure, when the battery box is not connected to an external pipeline, the stop valve can effectively seal the fluid medium in the pipeline, preventing the fluid medium from flowing out. When the battery box is connected to an external pipeline, the stop valve can quickly connect to the external pipeline, thereby facilitating the flow of the fluid medium.

[0020] Preferably, the stop valve is one of a plug-in connector or a plug-in plug, and a plug-in connector and a corresponding plug-in plug constitute a plug-in. The plug-in connector and the plug-in plug can cooperate with each other to realize the connection or disconnection of the fluid medium.

[0021] Preferably, the pipe connector is a plug-in connector, which includes: a connector valve core, a connector valve plug, a connector valve body, and a connector elastic element; one end of the connector valve body is an open end for receiving a plug; the connector valve core is fixed inside the connector valve body and forms a fluid medium channel between the open end and the connector valve body; the connector valve plug is arranged around the connector valve core and is capable of reciprocating between an open position that opens the fluid medium channel and a closed position that closes the fluid medium channel; the connector elastic element biases the connector valve plug in a direction that causes the connector valve plug to move toward the closed position.

[0022] Alternatively, the pipe connector is a plug-in connector, which includes: a plug valve core, a plug valve housing, and a plug elastic element; the plug valve housing has an insertion end opening; the plug valve core is disposed inside the plug valve housing and is capable of reciprocating between a first position where the insertion end opening is open and a second position where the insertion end opening is closed; the plug elastic element biases the plug valve core in a direction that causes the plug valve core to move toward the second position; the insertion end is used to insert into the opening end.

[0023] In this solution, by adopting the above structure and using plug-in connectors or plug-in plugs as pipe joints, the sealing performance of the pipe joints can be improved, which helps to reduce the risk of fluid media leakage.

[0024] Preferably, the pipe joint is further provided with a guide, which is a protrusion or a recess.

[0025] In this solution, by adopting the above structure and utilizing guide components, the accuracy of the connection between the pipe joint and the external pipeline is improved, which in turn improves the efficiency of the connection between the pipe and the external pipeline.

[0026] Preferably, the battery box further includes an electrical connector, which is disposed on the same side wall of the battery box as the conduit joint.

[0027] In this solution, by adopting the above structure, it is beneficial to simultaneously connect the circuit and piping of the battery box.

[0028] Preferably, the conduit fitting is located on the electrical connector.

[0029] In this solution, by adopting the above structure, it is beneficial to connect the circuit and pipeline of the battery box at the same time, and it also simplifies the installation of pipeline joints and electrical connectors, so that pipeline joints and electrical connectors can be installed as a whole.

[0030] An electric vehicle comprising a battery box as described above.

[0031] In this solution, by adopting the above structure, it is beneficial to improve the safety of the battery box, reduce the risk of short circuit in the battery box, and improve the safety of electric vehicles.

[0032] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0033] The positive and progressive effects of this invention are as follows:

[0034] This invention, by placing pipes inside or outside the side wall of the enclosure and connecting them to external pipes, allows the fluid medium to flow through the pipes. This facilitates heat exchange between the enclosure and the fluid medium, effectively controlling the heat within the enclosure and extending its lifespan. Because the pipes are located inside or outside the side wall, leaks or seepage of the fluid medium will not adversely affect the battery and will not cause short circuits. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the battery box structure according to a preferred embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of the piping structure of the battery box according to a preferred embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of the structure of a pipe joint including a plug-in connector in a battery box according to a preferred embodiment of the present invention.

[0038] Figure 4 for Figure 3 A cross-sectional structural diagram of the pipe joints in the diagram.

[0039] Figure 5 This is a schematic diagram of the pipe joint including the plug of the battery box according to a preferred embodiment of the present invention.

[0040] Figure 6for Figure 5 A schematic diagram of the pipe joint structure.

[0041] Figure 7 for Figure 3 and Figure 5 The diagram shows the structure of the pipe fitting clip.

[0042] Figure 8 for Figure 7 A schematic diagram of the battery connector card and its cross-sectional structure.

[0043] Figure 9 This is a schematic diagram of the connector and plug of the battery box according to a preferred embodiment of the present invention.

[0044] Figure 10 This is a cross-sectional structural diagram of the connector and plug of the battery box according to a preferred embodiment of the present invention.

[0045] Figure 11 This is a schematic diagram of the connector and plug-in card of the battery box according to a preferred embodiment of the present invention, both of which are in a normal connected state.

[0046] Figure 12 This is a schematic diagram of the connector and plug of the battery box according to a preferred embodiment of the present invention, showing the two in their ultimate plug-in state.

[0047] Figure 13 This is a cross-sectional structural diagram of an electrical connector with a conduit joint in a battery box according to a preferred embodiment of the present invention.

[0048] Explanation of reference numerals in the attached figures:

[0049] Battery box 500

[0050] Box 51

[0051] Pipeline 52

[0052] Protrusion 53

[0053] Pipe joint 60

[0054] Guide component 61

[0055] Guide hole 611

[0056] Guide column 612

[0057] Fixing plate 62

[0058] Sheath 63

[0059] Floating plate 64

[0060] Tension spring 65

[0061] Water pipe connector 66

[0062] Inner cover plate 67

[0063] Outer cover plate 68

[0064] Fixed base 69

[0065] Connector 10

[0066] Plug connector 20

[0067] Connector valve core 21

[0068] Connector valve plug 22

[0069] Connector valve body 23

[0070] Open end 231

[0071] Fluid medium channel 232

[0072] Step surface 233

[0073] First distribution port 24

[0074] 25 Connector elastic element

[0075] First sealing element 26

[0076] Second seal 27

[0077] Insertion slot 271

[0078] Sealing ring 272

[0079] Plug 30

[0080] Plug valve core 31

[0081] Plug valve housing 32

[0082] Insertion end 321

[0083] Limiting surface 322

[0084] Second distribution port 323

[0085] Plug elastic element 33

[0086] Electrical connector 40

[0087] Electrical connection part 41

[0088] Connecting part 42

[0089] Electrical connector plug 43

[0090] Electrical connector 44 Detailed Implementation

[0091] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0092] like Figures 1-13 This embodiment is a battery box 500, which includes a box body 51. At least one side wall of the box body 51 is embedded with a pipe 52, or a pipe 52 is provided on the inner or outer side of at least one side wall of the box body 51. The pipe 52 is connected to an external pipe to allow a fluid medium to flow within it. Here, the side wall refers to any face of the box body 51. Taking a cuboid box as an example, the side wall is any one of the six faces of the cuboid box: front, back, left, right, top, and bottom, not just the two sides. In this embodiment, the pipe 52 is located inside or outside the side wall of the box body 51 and is connected to an external pipe, so that the fluid medium can flow in the pipe 52. This allows heat exchange between the box body 51 and the fluid medium, which helps to control the heat inside the box body 51 within a suitable range and improves the lifespan of the battery box 500. Since the pipe 52 is located inside or outside the side wall of the box 51, leakage or seepage of the fluid medium will not adversely affect the battery in the box 51, and will not cause a short circuit due to leakage or seepage of the fluid medium. Figure 1 The box 51 shown only shows the lower box and the pipes 52 installed on the lower box, and does not show other components of the battery box. Figure 2 The above is one type of pipe arrangement pattern. In other embodiments, pipe 52 can also adopt other arrangement patterns, such as setting pipe 52 as "S" shape, "U" shape, etc.

[0093] In a preferred embodiment, a receiving space is formed within the side wall of the housing 51, and the pipeline 52 is disposed within the receiving space. This embodiment, by providing a receiving space within the side wall, helps to prevent the pipeline 52 from being damaged by external forces, reduces the risk of pipeline 52 breakage, improves the safety of the pipeline 52, and consequently enhances the safety of the battery box 500.

[0094] As a preferred implementation method, such as Figure 1 As shown, the pipes 52 inside the side wall of the housing 51 are integrally cast. This embodiment utilizes integrally cast pipes 52 and housing 51, which simplifies the design and manufacturing of the battery box 500 and improves its reliability.

[0095] For ease of installation of pipe 52, such as Figure 1As shown, the outer side surface of the sidewall of the housing 51 has an outwardly protruding protrusion 53, within which an accommodating space is formed; the pipe 52 is disposed within the accommodating space. In this embodiment, by providing an accommodating space within the protrusion 53, the thickness of the sidewall only needs to be increased at the location where the protrusion 53 is provided, thereby reducing the thickness of the sidewall at other locations. This is beneficial for reducing the average thickness of the sidewall, reducing the total weight of the sidewall, and consequently reducing the total weight of the battery box 500. In other embodiments, the inner side surface of the sidewall of the housing 51 may also have an outwardly protruding protrusion 53, within which an accommodating space is formed; the pipe 52 is disposed within the accommodating space.

[0096] In a preferred embodiment, the pipe 52 is embedded inside the lower side wall of the housing 51. In other embodiments, the pipe 52 is located on the inner or outer side of the lower side wall of the housing 51. By placing the pipe 52 inside or on the inner or outer side of the lower side wall, even if fluid leakage occurs, the fluid will flow directly out of the battery box 500 under gravity. This helps to avoid adverse effects of the fluid on the battery in the housing 51 and prevents short circuits due to fluid leakage, thus improving the safety of the battery box 500.

[0097] To improve connection efficiency, the battery box 500 also includes a pipe connector 60, which is disposed on the side wall of the battery box 500's body 51. Both ends of the pipe 52 are connected to the pipe connector 60, and the pipe 52 connects to external pipes through the pipe connector 60. This embodiment utilizes the pipe connector 60, which helps improve the efficiency, stability, and safety of the connection between the battery box 500's pipe 52 and external pipes.

[0098] As a preferred implementation method, such as Figures 3-8 As shown, the pipe connector 60 is also provided with a guide 61, which can be a protrusion or a recess. In this embodiment, the use of the guide 61 helps to improve the accuracy of the connection between the pipe connector 60 and the external pipe, thereby improving the efficiency of the connection between the pipe 52 and the external pipe. Figure 3 and Figure 4 The guide 61 is a recessed part, specifically a round tube, and the inner hole of the round tube is a guide hole 611, which is used to insert the guide post 612. Figure 5 and Figure 6 The guide member 61 is a protrusion, specifically a guide post 612, which is used to insert into the guide hole 611.

[0099] like Figures 3-8As shown, the stop valve can be either a plug connector 20 or a plug connector 30. A plug connector 20 and a corresponding plug connector 30 constitute a plug connector 10. The plug connector 20 and the plug connector 30 can cooperate with each other to realize the connection or disconnection of the fluid medium.

[0100] In a preferred embodiment, the pipe connector 60 is a plug-in connector 20, which includes: a connector valve core 21, a connector valve plug 22, a connector valve body 23, and a connector elastic member 25; one end of the connector valve body 23 is an open end 231, which is used to receive a plug; the connector valve core 21 is fixed inside the connector valve body 23, and a fluid medium channel 232 is formed between the open end 231 and the connector valve body 23; the connector valve plug 22 is arranged around the connector valve core 21 and can reciprocate between the open position of opening the fluid medium channel 232 and the closed position of closing the fluid medium channel 232; the connector elastic member 25 biases the connector valve plug 22 in the direction that causes the connector valve plug 22 to move toward the closed position.

[0101] In a preferred embodiment, the pipe connector 60 is a plug 30, which includes: a plug valve core 31, a plug valve housing 32, and a plug elastic member 33; the plug valve housing 32 has an insertion end 321 opening; the plug valve core 31 is disposed inside the plug valve housing 32 and can reciprocate between a first position with the insertion end 321 open and a second position with the insertion end 321 closed; the plug elastic member 33 biases the plug valve core 31 in a direction that causes the plug valve core 31 to move toward the second position; the insertion end 321 is used to insert into the opening end 231.

[0102] In this embodiment, a plug-in connector or plug-in plug is used as the pipe connector 60, which helps to improve the sealing performance of the pipe connector 60 and reduces the risk of fluid medium leakage.

[0103] As a specific implementation method, such as Figure 3 and Figure 4 In this embodiment, the pipe connector 60 is a plug-in connector 20. The plug-in connector is mounted on the fixed plate 62, and guide holes 611 are provided on both sides of the plug-in connector 20.

[0104] As another specific implementation method, such as Figure 5 and Figure 6In this embodiment, the pipe connector 60 is a plug-in connector 30. The plug-in connector 30 is mounted on a floating plate 64, and guide posts 612 are provided on both sides of the plug-in connector 30. Both the guide posts 612 and the plug-in connector 30 are mounted on the floating plate 64. The floating plate 64 can be a rectangular plate, and tension springs 65 are provided at the four corners of the floating plate 64, which connect the floating plate 64 to the fixed base 69. The floating plate 64 can move relative to the fixed base 69 in the direction of the elastic force of the tension springs 65, thereby driving the guide posts 612 and the plug-in connector 30 to move. When the guide posts 612 are inserted into the guide holes 611, the floating plate 64 can flexibly adjust its position. The fixed base 69 is also provided with an inner cover plate 67 and an outer cover plate 68 on both sides. The inner side of the inner cover plate 67 is provided with a protective sleeve 63, which is deformed by compression to achieve a seal with the other pipe connector 60. The plug is also connected to the water pipe connector 66, and the outer side of the outer cover plate 68 is also provided with a protective sleeve 63, which is used to achieve a seal with the external pipe 52.

[0105] like Figure 7 and Figure 8 As shown in the figure, the two pipe fittings 60 are interlocked. The guides 61 of the two pipe fittings 60 are inserted into each other. The connector 20 and connector plug 30 abut against each other to ensure the fluid medium passage is open.

[0106] like Figure 9-12 As shown in the figure, the structure of the connector is illustrated in detail.

[0107] like Figure 9-10 As shown, the connector 10 includes a connector 20 and a connector plug 30. The connector 20 and the connector plug 30 can cooperate with each other to achieve liquid communication. The fluid medium mentioned above can be, specifically, liquids such as water and ethylene glycol, or hot and cold gases from air conditioning systems.

[0108] The connector 20 includes: connector valve core 21, connector valve plug 22, connector valve body 23, and connector elastic element 25.

[0109] One end of the connector valve housing 23 is an open end 231, which is used to receive the plug.

[0110] The connector valve core 21 is fixed inside the connector valve housing 23, forming a fluid medium channel 232 between the open end 231 and the connector valve housing 23. In this embodiment, the connector valve core 21 is fixed inside the connector valve housing 23 by a threaded connection. The end of the connector valve core 21 has an external thread, and the inside of the connector valve housing 23 has a threaded hole, in which the connector valve core 21 is threadedly engaged. In other embodiments, the connector valve core can also be fixed inside the connector valve housing by welding, bonding, or other methods.

[0111] The connector valve plug 22 is arranged around the connector valve core 21 and is capable of reciprocating between the open position of the fluid medium passage 232 and the closed position of the fluid medium passage 232.

[0112] The connector elastic element 25 biases the connector valve plug 22 in the direction that causes the connector valve plug 22 to move toward the closed position.

[0113] In this embodiment, the connector elastic element 25 is a spring; in other embodiments, other suitable elastic elements may also be selected.

[0114] A first flow port 24 is provided in the connector valve housing 23, through which coolant enters or flows out of the inner cavity of the connector valve housing 23.

[0115] The plug 30 includes: a plug valve core 31, a plug valve housing 32, and a plug elastic element 33.

[0116] The insertion end 321 of the plug valve housing 32 is open.

[0117] The plug valve core 31 is located inside the plug valve housing 32 and can reciprocate between a first position where the opening of the insertion end 321 is open and a second position where the opening of the insertion end 321 is closed.

[0118] The plug elastic element 33 biases the plug valve core 31 in the direction that causes the plug valve core 31 to move toward the second position.

[0119] Insertion end 321 is used to insert open end 231.

[0120] In this embodiment, the plug elastic element 33 is a spring; in other embodiments, other suitable elastic elements may also be selected.

[0121] An insertion hole is provided in the plug valve housing 32, and the plug valve core 31 is slidably inserted into the insertion hole. A spring is sleeved on the plug valve core 31 and abuts against the plug valve housing 32 and the plug valve core 31.

[0122] The plug valve housing 32 is provided with a second flow port 323, through which coolant enters or flows out of the inner cavity of the plug valve housing 32.

[0123] like Figure 11As shown, when the connector 10 is normally connected, the connector plug 30 is inserted into the connector joint 20. The insertion end 321 of the plug valve housing 32 of the connector plug 30 abuts against the joint valve plug 22 of the connector joint 20, causing the joint valve plug 22 to move towards the open position against the elastic force of the joint elastic member 25, thus opening the fluid medium passage 232. At the same time, the joint valve core 21 of the connector joint 20 abuts against the plug valve core 31 of the connector plug 30, causing the plug valve core 31 to move towards the first position to open the opening of the insertion end 321. In this way, the opening of the insertion end 321 and the fluid medium passage 232 are opened simultaneously, so the connector joint 20 and the connector plug 30 are interconnected, allowing coolant to flow out of or into the battery pack through the connector 10.

[0124] The connector 10 achieves fluid communication through bidirectional extrusion, enabling each part to have a self-locking function and automatically connect when engaged, but without leaking when disassembled.

[0125] The plug connector 20 also includes a first seal 26, which is disposed between the outer periphery of the connector valve plug 22 and the inner wall of the connector valve housing 23.

[0126] By providing a first sealing element 26 between the outer periphery of the connector valve plug 22 and the inner wall of the connector valve housing 23, the sealing performance between the connector valve plug 22 and the inner wall of the connector valve housing 23 is enhanced.

[0127] The inner wall of the connector valve housing 23 is provided with a groove, and the first sealing element 26 is disposed in the groove.

[0128] The first sealing element 26 is an O-ring.

[0129] The end face of the connector valve plug 22 facing the opening end 231 is provided with a second seal 27.

[0130] By providing a second seal 27 on the end face of the connector valve plug 22 facing the opening end 231, the sealing between the connector connector 20 and the connector plug 30 is enhanced when they are engaged.

[0131] The second seal 27 extends toward the inner circumferential surface of the connector valve plug 22 to seal the gap between the connector valve plug 22 and the connector valve core 21.

[0132] In this way, the second seal 27 can not only strengthen the seal between the connector 20 and the connector plug 30, but also strengthen the seal between the connector valve core 21 and the connector valve plug 22, achieving two goals at once.

[0133] The second seal 27 is fitted onto the end of the connector valve plug 22 facing the opening end 231. The second seal 27 is designed as a kit for easy installation.

[0134] The second seal 27 has an annular structure and is provided with an insertion groove 271 and a sealing convex ring 272. The end of the connector valve plug 22 facing the opening end 231 is provided with an insertion part for engaging the insertion groove 271, and the sealing convex ring 272 is provided on the opposite side of the insertion groove 271.

[0135] The second seal 27 is provided with at least two sealing protrusions 272. The two sealing protrusions 272 can achieve two seals, ensuring the seal between the connector 20 and the connector plug 30 when they are engaged.

[0136] The end of the connector valve core 21 facing the opening end 231 is tapered and tapers towards the inside of the connector valve housing 23. In this way, a tapered fluid medium channel 232 that tapers outward is formed between the connector valve core 21 and the connector valve housing 23, so that the connector valve plug 22 can easily close the fluid medium channel 232.

[0137] The interior of the connector valve housing 23 is provided with a stepped surface 233, which is used to limit the movement distance of the connector valve plug 22 toward the open position.

[0138] like Figure 12 As shown, the connector plug 30 has been inserted to the limit position of the connector 20, and the connector valve plug 22 abuts against the stepped surface 233.

[0139] In this embodiment, the outer surface of the plug valve housing 32 of the connector plug 30 is also provided with a limiting surface 322, which abuts against the end of the connector valve housing 23 to prevent the connector plug 30 from being inserted too much.

[0140] The inner circumferential surface of the opening end 231 of the connector valve housing 23 is provided with an inclined guide surface.

[0141] The outer peripheral surface of the insertion end 321 is provided with an inclined guide structure, which is adapted to the inclined guide surface.

[0142] In this way, the connector plug 30 can be easily and accurately inserted into the connector connector 20.

[0143] In one embodiment, the battery box 500 also includes an electrical connector 40, which is disposed on the same side wall of the battery box 500 as the conduit connector 60.

[0144] In other embodiments, such as Figure 13 As shown, the conduit connector 60 is located on the electrical connector 40. This embodiment facilitates simultaneous connection of the battery box 500 circuit and the conduit 52. Specifically, as... Figure 13 As shown, the electrical connector 40 includes an electrical connection portion 41 and a connection portion 42, and the connection portion 42 includes the plug-in member 10 as described above.

[0145] The electrical connector 40 includes an electrical connector plug 43 and an electrical connector joint 44. One of the plug-in plug 30 and the plug-in joint 20 is disposed in the electrical connector plug 43, and the other of the plug-in plug 30 and the plug-in joint 20 is disposed in the electrical connector joint 44.

[0146] The use of the aforementioned plug 10 can improve the liquid tightness of the electrical connector 40, preventing liquid leakage that could cause short circuits or leakage in the electrical connector 40.

[0147] In other embodiments, the battery box 500 of this embodiment can also be used in an electric vehicle. This embodiment is beneficial for improving the safety of the battery box 500, reducing the risk of short circuits in the battery box 500, and improving the safety of the electric vehicle.

[0148] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A battery box characterized by, The battery box comprises a box body, at least one side wall of the box body is provided with a pipeline, or the pipeline is embedded in the at least one side wall of the box body, the pipeline is communicated with an external pipeline to allow a fluid medium to flow in the pipeline; The battery box further comprises a pipeline joint, the pipeline joint comprises a check valve, the check valve can be connected or disconnected to allow the pipeline to be connected or disconnected with the external pipeline; the check valve is one of a plug connector and a plug, one plug connector and one corresponding plug constitute a plug, the plug connector and the plug can be matched to realize the connection or disconnection of the fluid medium; the plug connector comprises a connector valve housing, the check valve is a plug connector, the plug connector comprises a connector valve plug, one end of the connector valve housing is an open end, the open end is used for receiving the plug; the end face of the end of the connector valve plug facing the open end is provided with a second sealing element, when the plug connector and the plug are engaged, the plug abuts against the second sealing element, the second sealing element extends towards the inner peripheral surface of the connector valve plug to seal the gap between the connector valve plug and the connector valve core.

2. The battery pack of claim 1, wherein, The side wall of the box body forms a containing space, and the pipeline is arranged in the containing space.

3. The battery pack of claim 2, wherein, The pipeline in the side wall of the box body is integrally formed with the side wall.

4. The battery pack of claim 1, wherein, The outer side of the side wall of the box body has a protruding portion protruding outward, and a containing space is formed in the protruding portion; Alternatively, the inner side of the side wall of the box body has a protruding portion protruding outward, and a containing space is formed in the protruding portion; The pipeline is arranged in the containing space.

5. The battery pack of claim 1, wherein, The pipeline is embedded in the inside of the lower side wall of the box body, or the pipeline is arranged on the inside or outside of the lower side wall of the box body.

6. The battery pack of claim 1, wherein, The pipeline joint is arranged on the side wall of the box body of the battery box, both ends of the pipeline are connected with the pipeline joint, and the pipeline is connected with the external pipeline through the pipeline joint.

7. The battery pack of claim 1, wherein, The plug connector further comprises a connector valve core and a connector elastic element; The connector valve core is fixedly arranged in the inside of the connector valve housing and forms a fluid medium passage between the open end and the connector valve housing; The connector valve plug is arranged around the connector valve core and can reciprocate between an open position for opening the fluid medium passage and a closed position for closing the fluid medium passage; The connector elastic element biases the connector valve plug in a direction of moving the connector valve plug towards the closed position.

8. The battery case according to claim 6 or 7, wherein The pipeline joint is further provided with a guide, which is a protruding part or a recessed part.

9. The battery pack of claim 6, wherein, The battery box further comprises an electrical connector, and the electrical connector and the pipeline joint are arranged on the same side wall of the battery box.

10. The battery pack of claim 9, wherein, The pipeline joint is arranged on the electrical connector.

11. An electric vehicle, characterized by The electric vehicle comprises the battery box according to any one of claims 1-10.

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