Explosion-proof valve, battery assembly and vehicle

Abstract

The invention provides an anti-explosion valve, a battery assembly and a vehicle. The anti-explosion valve comprises a valve body, a valve rod, a valve cover and a driving piece, the valve body comprises a vent hole, and the valve rod movably penetrates through the vent hole. The valve cover is fixed to the valve rod and used for blocking the vent hole. The driving piece is fixed to the valve body and connected with the valve rod, and the driving piece can drive the valve deck to move so as to control opening and closing of the vent hole. Through the arrangement, the automation degree of the anti-explosion valve is improved, the anti-explosion valve can be actively in the open state through the driving piece, and then the active protection capacity of the anti-explosion valve is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to an explosion-proof valve, a battery assembly and a vehicle. BACKGROUND

[0002] With the rapid development of the vehicle industry, new energy vehicles are increasingly occupying the vehicle market, and the safety of the battery pack, as an important component of new energy vehicles, is crucial. Among them, the explosion-proof valve in the battery pack is a key component to ensure the safety of the battery. Its core function is to release internal pressure in time when the battery is abnormal to prevent explosion and other dangerous situations.

[0003] However, the explosion-proof valve in the existing battery pack is generally a passive explosion-proof valve, that is, when the battery pack is abnormal, the valve is opened by the impact of high-temperature gas caused by thermal runaway. However, the passive opening response time of the explosion-proof valve is too long, and the high-temperature gas forms turbulence in the battery pack during this period, which damages the components in the battery pack. Moreover, after a short and intense exhaust of the battery cell, it will become a slow exhaust for a long time, the pressure in the battery pack decreases rapidly, and the explosion-proof valve is closed immediately. However, there is still high-temperature exhaust gas in the battery pack, which still affects the components in the battery pack.

[0004] Therefore, it is necessary to provide an improved explosion-proof valve to solve some or all of the above problems. SUMMARY

[0005] The present application provides an explosion-proof valve with active protection capability, a battery assembly and a vehicle.

[0006] The present application provides an explosion-proof valve, comprising:

[0007] a valve body, the valve body comprising a vent hole;

[0008] a valve rod, the valve rod movably penetrating the vent hole;

[0009] a valve cover, the valve cover being fixed to the valve rod and used to block the vent hole;

[0010] a driving member, the driving member being fixed to the valve body and connected with the valve rod, the driving member being capable of moving the valve cover to control the opening and closing of the vent hole.

[0011] Further, the valve body further comprises a rod connecting frame, the rod connecting frame being fixed to the inner wall of the vent hole, and the valve rod slidingly penetrating the rod connecting frame.

[0012] Further, the valve rod comprises a rod body and a ring plate, the rod body is arranged in the rod holder, the valve cover is fixed to one end of the rod body, and the ring plate is arranged at the other end of the rod body away from the valve cover.

[0013] Further, the elastic member is sleeved on the rod body; or

[0014] The elastic member is provided in plurality and is arranged along the circumference of the rod body.

[0015] Further, the elastic member is arranged along the axial direction of the rod body,

[0016] The driving member drives the valve cover to move away from and block the air hole; or

[0017] The driving member drives the valve cover to move away from the air hole in the direction away from the valve body, and the elastic member is compressed; or

[0018] The driving member drives the valve cover to move in the direction towards the valve body to block the air hole, and the elastic member is stretched.

[0019] Further, the filter is connected to the valve body away from the driving member, and the inner cavity of the filter is communicated with the air hole when the valve cover moves away from the air hole.

[0020] Further, the filter comprises a shell and a filter body, and the shell is fixed to the valve body.

[0021] The filter body is connected to the inner side of the shell in a sealed manner, and the shell and the filter body form the inner cavity of the filter; or

[0022] The filter body is arranged in a barrel type, the inner cavity of the filter is arranged in the filter body, and the outer side of the filter body is arranged in a spaced manner with the inner side of the shell.

[0023] Further, the filter body comprises a first filter screen, a filter core, a second filter screen and a sealing plate, and the shell comprises a main shell and a support plate protruding inwardly from the inner side of the main shell.

[0024] The first filter screen is arranged inside the second filter screen, the filter core is arranged between the first filter screen and the second filter screen, the second filter screen is fixed to the support plate and is arranged in a spaced manner with the inner side of the main shell, and the sealing plate is used to block the port of the first filter screen away from the valve body.

[0025] Further, the sealing plate comprises a sealing plate body, a convex ring and a through hole, the sealing plate body is fixed inside the convex ring and connected to the port of the first filter screen away from the valve body, the convex ring is clamped between the first filter screen and the second filter screen, and the through hole penetrates the convex ring and is correspondingly arranged with the filter core.

[0026] Further, the driving member comprises a driving host, a main shaft member, a pipe shaft and a mounting bracket, the mounting bracket is fixed to the valve body, the driving host is fixed to the mounting bracket and connected to the main shaft member, the pipe shaft is sleeved on the main shaft member and moves relative to the main shaft member, and the pipe shaft is connectable to the valve rod to drive the valve cover to move.

[0027] The application further provides a battery assembly comprising a processor and the explosion-proof valve as described above, and the processor is electrically connected to the driving member to control start and stop of the driving member.

[0028] The application further provides a vehicle comprising the battery assembly as described above.

[0029] Compared with the prior art, the explosion-proof valve of the application drives the valve cover to move through the driving member to control opening and closing of the vent hole, thereby improving the automation degree of the explosion-proof valve, and the explosion-proof valve can be actively opened through the driving member, thereby improving the active protection capability of the explosion-proof valve.

[0030] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the specification. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings incorporated in the specification and constituting a part of the specification illustrate embodiments consistent with the specification and serve to explain the principles of the specification together with the specification.

[0032] Figure 1 is a perspective view of the explosion-proof valve of the application.

[0033] Figure 2 is Figure 1 a side view of the explosion-proof valve in FIG. 1.

[0034] Figure 3 is Figure 2 a sectional view of the explosion-proof valve along A-A in FIG. 1.

[0035] Figure 4 is Figure 1 a perspective view of the valve body in the explosion-proof valve.

[0036] Figure 5 is Figure 4 a sectional view of the valve body along B-B in FIG. 2.

[0037] Figure 6 is Figure 3 isometric view of the explosion-proof valve.

[0038] Figure 7 is Figure 3 side view of the explosion-proof valve in an open state.

[0039] Figure 8 is Figure 7 isometric view of the explosion-proof valve in an open state.

[0040] Figure 9 is Figure 1 isometric view of the filter in the explosion-proof valve.

[0041] Figure 10 is Figure 9 cross-sectional view of the filter along C-C.

[0042] BRIEF DESCRIPTION OF DRAWINGS 1-valve body; 11-vent hole; 12-rod connecting frame; 121-mounting hole; 2-valve rod; 21-rod main body; 211-sliding rod part; 212-limiting part; 22-ring plate; 3-valve cover; 4-driving part; 41-driving main body; 42-main shaft part; 43-tube shaft; 44-mounting support; 5-elastic part; 6-filter; 60-inner cavity; 61-housing; 611-main housing; 612-support plate; 613-protection plate; 62-filter body; 621-first filter screen; 622-filter core; 623-second filter screen; 624-sealing plate; 6241-sealing plate body; 6242-convex ring; 6243-through hole. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments (or, “modes”) of the present application will be described clearly and completely below in conjunction with the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0044] If the application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain specific posture (as shown in the drawings); if the specific posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms “first”, “second”, etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0045] As Figures 1 to 5As shown, the explosion-proof valve of the present application comprises a valve body 1, a valve rod 2, a valve cover 3 and a driving member 4. The valve body 1 comprises a vent hole 11, and the valve rod 2 is movably arranged in the vent hole 11. The valve cover 3 is fixed to the valve rod 2 and is used to block the vent hole 11. The driving member 4 is fixed to the valve body 1 and is connected with the valve rod 2, and the driving member 4 can drive the valve cover 3 to move so as to control the opening and closing of the vent hole 11. In this way, the automation degree of the explosion-proof valve is improved, and the explosion-proof valve can be actively opened by the driving member 4, thereby improving the active protection capability of the explosion-proof valve.

[0046] In some embodiments, along the axial direction of the valve rod 2, the vent hole 11 penetrates the valve body 1, and the valve rod 2 can slide relative to the valve body 1. The valve body 1 can further comprise a rod connecting frame 12 fixed to the inner wall of the vent hole 11, and the valve rod 2 slides through the rod connecting frame 12. The rod connecting frame 12 comprises a mounting hole 121, and the valve rod 2 passes through the mounting hole 121 and can be in contact with the rod connecting frame 12 to limit the valve rod 2. Specifically, the valve rod 2 comprises a rod body 21 and a ring plate 22, the rod body 21 passes through the rod connecting frame 12, the valve cover 3 is fixed to one end of the rod body 21, and the ring plate 22 is arranged at the end of the rod body 21 away from the valve cover 3.

[0047] The rod body 21 comprises a sliding rod portion 211 and a limiting portion 212, the sliding rod portion 211 slides through the mounting hole 121, and one end of the sliding rod portion 211 is connected with the valve cover 3. The limiting portion 212 is located at the other end of the sliding rod portion 211, and the diameter of the limiting portion 212 is greater than that of the sliding rod portion 211. When the valve rod 2 slides, the limiting portion 212 can be in contact with the rod connecting frame 12. The ring plate 22 is fixed to the circumferential side of the limiting portion 212.

[0048] The valve cover 3 can move with the valve rod 2 to block and deviate from the vent hole 11. The driving member 4 is fixed to the side of the valve body 1 away from the valve cover 3, and the driving member 4 is preferably but not limited to a motor assembly. The driving member 4 comprises a driving host 41, a main shaft member 42, a pipe shaft 43 and a mounting bracket 44. The mounting bracket 44 is fixed to the valve body 1, the driving host 41 is fixed to the mounting bracket 44 and is connected with the main shaft member 42, the pipe shaft 43 is sleeved on the main shaft member 42 and moves relative to the main shaft member 42, and the pipe shaft 43 can be connected with the valve rod 2 to drive the valve cover 3 to move.

[0049] Specifically, the driving host 41 is an electric motor, such as a 12V bias motor. The driving host 41 can drive the main shaft member 42 to rotate, and the outer circumferential side of the main shaft member 42 and the inner circumferential side of the pipe shaft 43 are provided with threads. The main shaft member 42 only rotates, and the pipe shaft 43 moves under the cooperation with the main shaft member 42, thereby driving the valve rod 2 and the valve cover 3 to move.

[0050] In other embodiments, the driving member 4 can also be a gas cylinder assembly, a hydraulic cylinder assembly, etc., which will not be described herein.

[0051] Further in combination Figures 6 to 8 As shown in some embodiments, the explosion-proof valve can further comprise an elastic member 5, and two ends of the elastic member 5 are connected to the rod connecting frame 12 and the ring plate 22 respectively. The elastic member 5 can provide elastic force for the valve rod 2 to assist the movement of the valve rod 2. The elastic member 5 is preferably but not limited to a spring. The elastic member 5 is provided as one and is sleeved on the rod body 21. In this way, the installation efficiency of the explosion-proof valve is improved.

[0052] In other embodiments, the elastic member 5 is provided as multiple, and the multiple elastic members 5 are arranged along the circumference of the rod body 21 and are spaced apart around the circumferential side of the rod body 21. In this way, the manufacturing cost of the explosion-proof valve is reduced.

[0053] In some embodiments, along the axial direction of the rod body 21, the driving member 4 drives the valve cover 3 to move away from and block the vent hole 11. Specifically, when the explosion-proof valve is switched between the open state and the closed state, the valve rod 2 and the valve cover 3 are only driven by the driving member 4, and thus the elastic member 5 can be omitted to further reduce the manufacturing cost of the explosion-proof valve.

[0054] In other embodiments, along the axial direction of the rod body 21, the driving member 4 drives the valve cover 3 to move away from the valve body 1, so that the valve cover 3 moves away from the vent hole 11, and at this time the elastic member 5 is compressed. In this embodiment, when the explosion-proof valve is switched to the closed state, the valve cover 3 can be driven to block the vent hole 11 by relying on the elastic force of the elastic member 5, and in this process, only the driving member 4 needs to be closed or the driving member 4 needs to be assisted to reduce the working load of the driving member 4.

[0055] In other embodiments, along the axial direction of the rod body 21, the driving member 4 drives the valve cover 3 to move towards the valve body 1 to block the vent hole 11, and the elastic member 5 is stretched. In this embodiment, when the explosion-proof valve is switched to the open state, the valve cover 3 can be driven to move away from the vent hole 11 by relying on the elastic force of the elastic member 5, and in this process, only the driving member 4 needs to be closed or the driving member 4 needs to be assisted to reduce the working load of the driving member 4.

[0056] Further in combination Figure 9 And Figure 10 As shown in some embodiments, the explosion-proof valve can further comprise a filter member 6, wherein the filter member 6 is connected to the side of the valve body 1 away from the driving member 4. When the valve cover 3 moves away from the vent hole 11, the inner cavity 60 of the filter member 6 communicates with the vent hole 11. The filter member 6 comprises a shell 61 and a filter body 62, the shell 61 is fixed to the valve body 1, and the filter body 62 is connected to the shell 61. The gas flowing out through the vent hole 11 flows through the filter body 62 and is discharged from the explosion-proof valve through the shell 61.

[0057] The filter body 62 is in the shape of a round cake and is tightly connected to the inner side of the shell 61. The shell 61 and the filter body 62 form the inner cavity 60 of the filter 6.

[0058] In some other embodiments, the filter body 62 is in the shape of a barrel, and the inner cavity 60 of the filter 6 is arranged in the filter body 62. The outer side of the filter body 62 is spaced apart from the inner side of the shell 61 to facilitate the exhaust of the gas. In this embodiment, the filter 6 will be described in detail below.

[0059] The shell 61 comprises a main shell 611 and a support plate 612 protruding inwardly from the inner side of the main shell 611. The filter body 62 comprises a first filter screen 621, a filter core 622, a second filter screen 623, and a sealing plate 624. The first filter screen 621, the filter core 622, and the second filter screen 623 are all in the shape of a cylinder. The first filter screen 621 is located inside the second filter screen 623, and the filter core 622 is arranged between the first filter screen 621 and the second filter screen 623. The second filter screen 623 is fixed to the support plate 612 and has a gap between the inner side of the main shell 611. The sealing plate 624 is connected to the first filter screen 621 and / or the second filter screen 623 and is used to block the port of the first filter screen 621 away from the valve body 1. The sealing plate 624 and the first filter screen 621 form the inner cavity 60 of the filter 6.

[0060] The sealing plate 624 comprises a sealing plate body 6241, a protruding ring 6242, and a through hole 6243. The sealing plate body 6241 is fixed to the inner side of the protruding ring 6242 and is connected to the port of the first filter screen 621 away from the valve body 1. The thickness of the protruding ring 6242 is greater than the thickness of the sealing plate body 6241, and the protruding ring 6242 is clamped between the first filter screen 621 and the second filter screen 623. The through hole 6243 penetrates the protruding ring 6242 and is arranged correspondingly to the filter core 622. When the gas flowing out of the vent hole 11 flows through the filter body 62, the gas can flow out of the second filter screen 623 and the through hole 6243.

[0061] The shell 61 can further comprise a protective plate 613 connected to the port of the main shell 611 away from the valve body 1. When the explosion-proof valve is transported or stored, the protective plate 613 is used to prevent impurities from entering the filter 6. When the explosion-proof valve is used for the first time, the protective plate 613 can be separated from the main shell 611 under the action of the gas pressure, so that the gas can be smoothly discharged from the filter 6.

[0062] The application also provides a battery assembly comprising a processor and the explosion-proof valve as described above, the processor being electrically connected with the driving member 4 to control the start and stop of the driving member 4. When the detection device of the battery assembly detects abnormal data such as temperature, voltage, current and air pressure and determines that there is a risk of thermal runaway, the processor can autonomously control the driving member 4 to drive the valve cover 3 to move, so that the explosion-proof valve is in an open state in time, and then the high-temperature gas in the battery assembly is discharged.

[0063] In this way, the self-protection ability of the explosion-proof valve and the battery assembly is improved to avoid the formation of turbulent flow of high-temperature gas in the battery assembly, and the damage degree of components is reduced. Moreover, the processor controls the driving member 4, so that the explosion-proof valve is in an open state for a long time, and then the high-temperature exhaust gas is discharged as clean as possible. At the same time, the filter 6 can filter solid particles and harmful gas in the high-temperature gas to reduce the pollution to the environment.

[0064] When the detection device of the battery assembly detects that the air pressure in the bag returns to normal, the processor can autonomously control the driving member 4 to drive the valve cover 3 to move towards the air hole 11 or the processor controls the driving member 4 to close, and the valve cover 3 is driven by the elastic force of the elastic member 5 to move towards the air hole 11, so that the explosion-proof valve is in a closed state. It is worth noting that the movement of the valve cover 3 controlled by the driving member 4 and the movement of the valve cover 3 controlled by the elastic member 5 do not affect each other, and there are the above two protection measures when the battery assembly has a risk of thermal runaway. Among them, the processor controls the driving member 4 to make the explosion-proof valve in an open or closed state as the main protection measure, and when the processor or the driving member 4 fails, the valve can still be opened by the impact of high-temperature gas in thermal runaway.

[0065] The application also provides a vehicle comprising the battery assembly as described above.

[0066] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of protection of the application.

Claims

1. An explosion-proof valve, characterized in that: include: a valve body, the valve body comprising a vent; a valve stem, the valve stem being movably disposed through the vent hole; a valve cover, the valve cover being fixed to the valve stem and used for sealing the vent hole; A driving member is fixed to the valve body and connected to the valve stem. The driving member can drive the valve cover to move to control the opening and closing of the vent hole.

2. The explosion-proof valve according to claim 1, characterized in that: The valve body further comprises a rod connecting frame, the rod connecting frame is fixed to the inner wall of the vent hole, and the valve stem is slidably arranged through the rod connecting frame.

3. The explosion-proof valve according to claim 2, characterized in that: It also includes an elastic member, the valve stem includes a rod body and a ring plate, the rod body is inserted into the rod connecting frame, the valve cover is fixed to one end of the rod body, the ring plate is arranged at the end of the rod body away from the valve cover, and the two ends of the elastic member are respectively connected to the rod connecting frame and the ring plate.

4. The explosion-proof valve according to claim 3, characterized in that: The elastic member is sleeved on the rod body; or A plurality of elastic members are provided, and along the circumferential direction of the rod body, the plurality of elastic members are spaced apart around the circumference of the rod body.

5. The explosion-proof valve according to claim 3, characterized in that: Along the axial direction of the rod body, The driving member drives the valve cover to move so as to move away from and block the vent hole; or The driving member drives the valve cover to move in a direction away from the valve body to move away from the vent hole, and the elastic member is compressed; or The driving member drives the valve cover to move in a direction toward the valve body to block the vent hole, and the elastic member is stretched.

6. The explosion-proof valve according to claim 1, characterized in that: It also includes a filter element connected to the side of the valve body facing away from the driving element. When the valve cover moves away from the vent hole, the inner cavity of the filter element is communicated with the vent hole.

7. The explosion-proof valve according to claim 6, characterized in that: The filter element includes a shell and a filter body, and the shell is fixed to the valve body; The filter body is tightly connected to the inner side of the shell, and the shell and the filter body form an inner cavity of the filter element; or The filter body is arranged in a barrel shape, the inner cavity of the filter element is arranged in the filter body, and the outer side of the filter body is spaced apart from the inner side of the shell.

8. The explosion-proof valve according to claim 7, characterized in that: The filter body includes a first filter screen, a filter element, a second filter screen and a sealing plate, and the housing includes a main housing and a support plate protruding inward from the inner side of the main housing; The first filter is located inside the second filter, the filter element is arranged between the first filter and the second filter, the second filter is fixed to the support plate, and a gap is provided between the second filter and the inner side of the main shell, and the sealing plate is used to seal the port of the first filter away from the valve body.

9. The explosion-proof valve according to claim 8, characterized in that: The sealing plate includes a sealing plate body, a convex ring and a through hole. The sealing plate body is fixed to the inner side of the convex ring and is connected to the port of the first filter screen facing away from the valve body. The convex ring is clamped between the first filter screen and the second filter screen. The through hole passes through the convex ring and is arranged corresponding to the filter element.

10. The explosion-proof valve according to claim 1, characterized in that: The driving member includes a driving main unit, a main shaft, a pipe shaft and a mounting bracket. The mounting bracket is fixed to the valve body. The driving main unit is fixed to the mounting bracket and is connected to the main shaft. The pipe shaft is sleeved on the main shaft and moves relative to the main shaft. The pipe shaft can be connected to the valve stem to drive the valve cover to move.

11. A battery assembly, characterized in that: The explosion-proof valve comprises a processor and any one of claims 1 to 10, wherein the processor is electrically connected to the driving member to control the start and stop of the driving member.

12. A vehicle, characterized in that: Comprising the battery assembly as claimed in claim 11.

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