Explosion-proof valve, battery pack and vehicle

Abstract

The invention discloses an anti-explosion valve, a battery pack and a vehicle. The anti-explosion valve comprises a valve body, a valve core and a valve core, the water inlet detection piece is arranged on the valve body; one end of the first electric connecting wire is connected with the water inlet detection piece, and the other end of the first electric connecting wire is suitable for being connected with a low-voltage wire harness of the battery pack; wherein the water inlet detection piece has an early warning state, when water enters the valve body, the water inlet detection piece is switched to the early warning state and generates a current signal, and the current signal is transmitted to the battery pack control system through the first electric connecting wire and the low-voltage wire harness. According to the anti-explosion valve, the water inlet detection piece is arranged on the valve body, the water inlet condition of the battery pack can be detected, early warning can be conducted in advance, the safety risk is reduced, and the troubleshooting time and labor cost are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery protection equipment, and in particular to an explosion-proof valve, a battery pack and a vehicle. Background Art

[0002] In the prior art, the explosion-proof valve is mainly composed of a valve body, a valve, a spring and a sealing device. When the pressure inside the battery pack reaches a certain value, the explosion-proof valve opens to release the gas inside the battery pack to the outside, thereby effectively avoiding safety accidents. However, the explosion-proof valve lacks water ingress detection and early warning functions. When working under relatively harsh working conditions, the explosion-proof valve may fail, causing water to enter the battery pack, and then abnormal phenomena such as short circuit, arcing, and fire in the battery pack. If the battery pack cannot be warned in the first time, more serious safety accidents will occur. Moreover, since there are many reasons for short circuit, arcing, and fire, staff often cannot directly determine whether it is caused by the failure of the explosion-proof valve. The entire battery pack needs to be disassembled and analyzed, which is extremely time-consuming and labor-intensive. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an explosion-proof valve, which can detect the water ingress of the battery pack and provide an early warning by arranging a water ingress detection member on the valve body, thereby reducing safety risks and saving time and labor costs for troubleshooting.

[0004] Another object of the present invention is to provide a battery pack including the above-mentioned explosion-proof valve.

[0005] Another object of the present invention is to provide a vehicle comprising the above-mentioned battery pack.

[0006] According to an explosion-proof valve of an embodiment of the first aspect of the present invention, the valve comprises: a valve body; a water inlet detection component, which is arranged on the valve body; a first electrical connection line, one end of which is connected to the water inlet detection component, and the other end of which is suitable for being connected to a low-voltage wiring harness of a battery pack; wherein the water inlet detection component has a warning state, and when water enters the valve body, the water inlet detection component switches to the warning state and generates a current signal, and the current signal is transmitted to the battery pack control system through the first electrical connection line and the low-voltage wiring harness.

[0007] According to the explosion-proof valve of the first aspect of the present invention, a water inlet detection component is provided on the valve body, so that the water ingress into the battery pack can be detected and early warning can be given, thereby reducing the safety risk. Moreover, when water ingress occurs to the battery pack, there is no need to disassemble and analyze the entire battery pack, thereby saving time and labor costs for troubleshooting.

[0008] According to some embodiments of the present invention, the valve body includes: a main body, the main body having a pressure detection component; a valve cover, the valve cover is arranged on one axial side of the main body; a protective component, the protective component is arranged on the other axial side of the main body, and the pressure detection component is arranged in the protective component, and the water inlet detection component is arranged on the protective component.

[0009] According to some embodiments of the present invention, a groove is formed on the protective member; the water inlet detection member includes: an induction ring, which is arranged in the groove and is a member that releases heat when in contact with water; and a temperature detection terminal, wherein both ends of the temperature detection terminal are respectively connected to the induction ring and one end of the first electrical connection line.

[0010] According to some embodiments of the present invention, a groove is formed on the protective member; the water inlet detection member is a detection harness, the detection harness is arranged in the groove, the detection harness is connected to the first electrical connection line, and the detection harness is conductive when encountering water and generates the current signal.

[0011] According to some embodiments of the present invention, the detection wiring harness includes: a first detection wire; a second detection wire; an insulating bobbin, a spiral structure is formed on the insulating bobbin, and the first detection wire and the second detection wire are wound on the spiral structure; wherein, when the water inlet detection component is switched to the warning state, the first detection wire and the second detection wire are connected.

[0012] According to some embodiments of the present invention, a plurality of water inlet holes are formed on the side wall of the protective member, and the plurality of water inlet holes are spaced apart along the circumference of the protective member; the water inlet detection member is a humidity sensor, and the humidity sensor is disposed in the protective member, and one end of the first electrical connection line passes through the protective member and is connected to the humidity sensor.

[0013] According to some embodiments of the present invention, the protective member includes: a protective body, in which the pressure detection member is arranged; a mounting portion, which is arranged on a side of the protective body adjacent to the valve cover, and the outer diameter of the mounting portion is larger than the outer diameter of the protective body; wherein the water inlet detection member is arranged in the mounting portion or the protective body.

[0014] According to some embodiments of the present invention, the protective member further comprises: a plurality of connecting portions, two ends of each of the connecting portions are respectively connected to the protective body and the mounting portion, and the plurality of connecting portions are spaced apart along the circumference of the protective body.

[0015] A battery pack according to an embodiment of a second aspect of the present invention comprises an explosion-proof valve according to an embodiment of the first aspect of the present invention.

[0016] A vehicle according to an embodiment of a third aspect of the present invention comprises a battery pack according to an embodiment of the second aspect of the present invention.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of an explosion-proof valve according to an embodiment of the present invention; Figure 2 is an exploded view of an explosion-proof valve according to an embodiment of the present invention; Figure 3 is a schematic diagram of an explosion-proof valve according to another embodiment of the present invention; Figure 4 is a schematic diagram of a detection harness according to an embodiment of the present invention; Figure 5 is a schematic diagram of an explosion-proof valve according to yet another embodiment of the present invention; Figure 6 is a schematic diagram of a protective member according to an embodiment of the present invention; Figure 7 is a schematic diagram of a battery pack according to an embodiment of the present invention.

[0020] Description of reference numerals: 100. Explosion-proof valve; 1. Valve body; 11. Main body; 111. Pressure detection member; 12. Valve cover; 13. Protective member; 131. Protective body; 1311. Water inlet hole; 132. Mounting part; 1321. Groove; 133. Connecting part; 2. Water inlet detection member; 3. First electrical connection line; 4. Induction ring; 5. Temperature detection terminal; 6. Detection harness; 61. First detection wire; 62. Second detection wire; 63. Insulating bobbin; 631. Spiral structure; 7. Humidity sensor; 200. Battery pack. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 6 An explosion-proof valve 100 according to an embodiment of a first aspect of the present invention is described.

[0022] like Figure 1 and Figure 2 As shown, the explosion-proof valve 100 according to the first embodiment of the present invention includes a valve body 1, a water inlet detection member 2 and a first electrical connection line 3. Specifically, the water inlet detection member 2 is arranged on the valve body 1. One end of the first electrical connection line 3 is connected to the water inlet detection member 2, and the other end of the first electrical connection line 3 is suitable for connecting to the low-voltage wiring harness of the battery pack 200.

[0023] Among them, the water inlet detection component 2 has a warning state. When water enters the valve body 1, the water inlet detection component 2 switches to the warning state and generates a current signal, and the current signal is transmitted to the battery pack 200 control system through the first electrical connection line 3 and the low-voltage wiring harness.

[0024] For example, in Figure 1 and Figure 2 In the example, the water inlet detection component 2 is arranged on the side of the valve body 1 close to the inside of the battery pack 200. When water enters the valve body 1, the water inlet detection component 2 switches to the warning state, and the control system of the battery pack 200 promptly receives the current signal transmitted by the water inlet detection component 2, so that fault detection can be carried out in time to prevent the battery pack 200 from causing electrical faults such as short circuit or thermal runaway due to water ingress, thereby reducing safety risks, making the operation of the battery pack 200 more reliable, and reducing the need for large-scale repairs and replacement of parts caused by water ingress into the battery pack 200, thereby reducing the maintenance cost of the battery pack 200. Moreover, when the control system of the battery pack 200 receives the current signal, it can quickly locate the explosion-proof valve 100 that may have a water inlet problem, without the need to disassemble and analyze the entire battery pack 200, saving time and labor costs for troubleshooting. In addition, the water inlet detection component 2 is connected to the first electrical connection line 3 and the low-voltage wiring harness of the battery pack 200, ensuring that the current signal can be accurately transmitted to the control system of the battery pack 200, reducing the risk of failure due to misjudgment or missed judgment, and making the operation of the battery pack 200 more reliable.

[0025] According to the explosion-proof valve 100 of the embodiment of the present invention, by providing a water inlet detection component 2 on the valve body 1, the water inlet condition of the battery pack 200 can be detected and an early warning can be given, thereby reducing the safety risk. Moreover, when the battery pack 200 has a water inlet problem, there is no need to disassemble and analyze the entire battery pack 200, thereby saving time and labor costs for troubleshooting.

[0026] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the valve body 1 includes a main body 11, a valve cover 12 and a protective member 13. Specifically, the main body 11 has a pressure detection member 111. The valve cover 12 is arranged in the axial direction of the main body 11 (for example, Figure 1The protective member 13 is arranged on one side of the axial direction of the main body 11, and the pressure detection member 111 is arranged in the protective member 13, and the water inlet detection member 2 is arranged on the protective member 13.

[0027] For example, in Figure 2 In the example, the main body 11 is suitable for connecting to the battery pack 200, the protective member 13 is roughly a hollow columnar structure to accommodate the pressure detection member 111 on the main body 11, the protective member 13 is arranged on the side of the main body 11 close to the inside of the battery pack 200, and the valve cover 12 is arranged on the side of the main body 11 away from the battery pack 200.

[0028] In specific implementation, the pressure detection component 111 is suitable for detecting and warning pressure changes in the battery pack 200 that may be caused by chemical reactions or external environmental factors, so that the staff can troubleshoot possible faults in the battery pack 200. By setting the pressure detection component 111 in the protective component 13, it is possible to prevent the pressure detection component 111 from being affected by external environmental factors (such as dust, moisture, etc.), thereby ensuring the detection accuracy of the pressure detection component 111. Since the protective component 13 is in a position where it may come into contact with water, the water inlet detection component 2 is set on the protective component 13, which can enable the water inlet detection component 2 to switch to the warning state in time. In addition, the water inlet detection component 2 and the pressure detection component 111 make full use of the installation space on the protective component 13, thereby improving the overall structural compactness of the explosion-proof valve 100.

[0029] In some optional embodiments, such as Figure 2 and Figure 6 As shown, a groove 1321 is formed on the protective member 13. The water inlet detection member 2 includes an induction ring 4 and a temperature detection terminal 5. Specifically, the induction ring 4 is arranged in the groove 1321, and the induction ring 4 is a heat release member when it comes into contact with water. Two ends of the temperature detection terminal 5 are respectively connected to the induction ring 4 and one end of the first electrical connection line 3.

[0030] For example, in Figure 2 and Figure 6 In the example, the groove 1321 on the protective member 13 is an annular groove, and the size of the annular groove roughly matches the induction ring 4, so that the induction ring 4 can be stably fixed in the groove 1321, and the groove 1321 can protect the induction ring 4, prevent the induction ring 4 from being collided by other components, and ensure that the induction ring 4 can work normally.

[0031] When the induction ring 4 contacts water, an exothermic reaction will occur in the induction ring 4. The temperature detection terminal 5 can detect the temperature change in real time, convert the temperature change into a current signal, and transmit the current signal to the battery pack 200 control system through the first electrical connection line 3, thereby realizing fast and accurate water ingress detection. It should be noted that the induction ring 4 can be made of quicklime, sodium bicarbonate, magnesium sulfate and other materials that release heat strongly when in contact with water. Those skilled in the art can choose according to actual needs, and the embodiment of the present application is not specifically limited here.

[0032] In other embodiments, Figure 3 and Figure 6 As shown, a groove 1321 is formed on the protective member 13. The water inlet detection member 2 is a detection harness 6, which is arranged in the groove 1321 and connected to the first electrical connection line 3. The detection harness 6 is conductive when encountering water and generates a current signal.

[0033] For example, in Figure 3 and Figure 6 In the example, the groove 1321 on the protective member 13 is an annular groove, and the detection harness 6 is annular and matches the shape of the annular groove, so that the detection harness 6 is stably fixed in the groove 1321, and the groove 1321 can protect the detection harness 6, prevent the detection harness 6 from being collided with other components, and ensure that the detection harness 6 can work normally.

[0034] When water enters the groove 1321 and contacts the detection harness 6, the detection harness 6 switches to a conducting state. The current signal generated after conduction can be transmitted to the battery pack 200 control system in a timely and accurate manner through the first electrical connection line 3, thereby achieving fast and accurate water ingress detection.

[0035] Furthermore, if Figure 4 As shown, the detection harness 6 includes a first detection wire 61 , a second detection wire 62 and an insulating bobbin 63 .

[0036] In a specific implementation, a spiral structure 631 is formed on the insulating bobbin 63, and the first detection wire 61 and the second detection wire 62 are wound on the spiral structure 631. When the water inlet detection element 2 is switched to the warning state, the first detection wire 61 and the second detection wire 62 are connected.

[0037] For example, in Figure 4 In the example, the first detection wire 61 and the second detection wire 62 are wound on the spiral structure 631 with a certain distance between them. Such a configuration enables the first detection wire 61 and the second detection wire 62 to be tightly wound around the insulating bobbin 63, and in a dry environment, the detection harness 6 cannot generate a current signal. Only when water enters the groove 1321 and contacts the detection harness 6, the water will penetrate into the space between the first detection wire 61 and the second detection wire 62. Since water is conductive, under the action of water, a conductive path is formed between the first detection wire 61 and the second detection wire 62 that were originally isolated by the insulating bobbin 63, and a current signal is generated. The current signal is timely and accurately transmitted to the control system of the battery pack 200, thereby realizing fast and accurate water ingress detection.

[0038] According to some embodiments of the present invention, Figure 5 As shown, the side wall of the protective member 13 is formed with a plurality of water inlet holes 1311, and the plurality of water inlet holes 1311 are spaced apart along the circumference of the protective member 13. The water inlet detection member 2 is a humidity sensor 7, and the humidity sensor 7 is arranged in the protective member 13, and one end of the first electrical connection line 3 passes through the protective member 13 and is connected to the humidity sensor 7. In the description of the present invention, "plurality" means two or more.

[0039] like Figure 5 As shown, the water inlet hole 1311 is arranged near the side of the protective member 13 facing the inside of the battery pack 200, and the multiple water inlet holes 1311 are spaced apart along the circumference of the protective member 13, which can expand the coverage of water inlet detection, thereby being able to more comprehensively detect water inlet conditions in different directions. By arranging the humidity sensor 7 in the protective member 13, the humidity change inside the protective member 13 can be directly detected. Once water enters the protective member 13, the humidity sensor 7 can quickly sense the increase in humidity, and convert the humidity signal into a current signal, and accurately transmit the current signal through the first electrical connection line 3. Moreover, the protective member 13 not only plays a certain protective role for the humidity sensor 7, but also provides an installation path for the first electrical connection line 3, thereby ensuring the reliability of signal transmission. In addition, the humidity sensor 7 can detect slight changes in humidity before a large amount of moisture has accumulated, thereby issuing a warning signal in advance, further realizing fast and accurate water inlet detection.

[0040] Furthermore, if Figure 2 and Figure 6 As shown, the protective member 13 includes a protective body 131 and a mounting portion 132. Specifically, the protective body 131 is provided with a pressure detection member 111. The mounting portion 132 is provided on one side of the protective body 131 adjacent to the valve cover 12, and the outer diameter of the mounting portion 132 is greater than the outer diameter of the protective body 131. The water inlet detection member 2 is provided in the mounting portion 132 or the protective body 131.

[0041] For example, in Figure 6 In the example, the cross section of the protective member 13 is roughly T-shaped, and the protective body 131 is a cylindrical structure. When the water inlet detection member 2 adopts the induction ring 4 or the detection harness 6, a groove 1321 is formed on the mounting portion 132, and the induction ring 4 or the detection harness 6 is arranged on the groove 1321 of the mounting portion 132; when the water inlet detection member 2 adopts the humidity sensor 7, the water inlet hole 1311 is opened on the protective body 131, and the humidity detector is arranged in the protective body 131.

[0042] Since the outer diameter of the mounting portion 132 is relatively large, it can better cooperate with the valve body 11, so that the fixing of the protective member 13 and the body 11 is more stable, thereby ensuring the overall structural stability of the explosion-proof valve 100. Secondly, the arrangement of the protective body 131 and the mounting portion 132 provides a reliable installation space for different arrangement modes of the water inlet detection member 2, thereby expanding the application range of the protective member 13.

[0043] Furthermore, the protective member 13 further includes a plurality of connecting portions 133 , both ends of each connecting portion 133 are respectively connected to the protective body 131 and the mounting portion 132 , and the plurality of connecting portions 133 are spaced apart along the circumference of the protective body 131 .

[0044] For example, in Figure 6 In the example, the mounting portion 132 is in a circular ring structure, and three connecting portions 133 are provided.

[0045] In a specific implementation, the plurality of connection parts 133 are respectively connected to the protection body 131 and the mounting part 132, thereby improving the overall structural stability of the protection member 13. The plurality of connection parts 133 are spaced apart along the circumference of the protection body 131, so that the protection member 13 can be uniformly supported in all directions, further improving the reliability and structural stability of the protection member 13.

[0046] According to the battery pack 200 of the second embodiment of the present invention, Figure 7 As shown, it includes an explosion-proof valve 100 according to the first embodiment of the present invention.

[0047] For example, in Figure 7 In the example of , four explosion-proof valves 100 are provided on the battery pack 200 , and the four explosion-proof valves 100 are respectively provided at four right angles of the battery pack 200 .

[0048] According to the battery pack 200 of the embodiment of the present invention, by adopting the explosion-proof valve 100, the water ingress into the battery pack 200 can be detected and warned in a timely and accurate manner, so as to prevent the water ingress into the battery pack 200 from causing electrical faults such as short circuit or thermal runaway, thereby reducing the safety risk, making the operation of the battery pack 200 more reliable, and reducing the need for large-scale repairs and replacement of parts caused by water ingress into the battery pack 200, thereby reducing the maintenance cost of the battery pack 200. In addition, the risk of failure caused by misjudgment or missed judgment is reduced, making the operation of the battery pack 200 more reliable.

[0049] Other structures and operations of the battery pack 200 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0050] The vehicle according to the third aspect of the present invention comprises the battery pack 200 according to the second aspect of the present invention.

[0051] According to the vehicle (not shown) of the embodiment of the present invention, by adopting the above-mentioned battery pack 200, the safety risk of the vehicle is reduced, the maintenance cost of the vehicle is reduced, and the operation of the vehicle is made more reliable.

[0052] Other components and operations of the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An explosion-proof valve, characterized in that: include: Valve body; A water inlet detection member, the water inlet detection member is arranged on the valve body; a first electrical connection line, one end of which is connected to the water inlet detection element, and the other end of which is suitable for being connected to a low-voltage wiring harness of a battery pack; Among them, the water inlet detection component has a warning state. When water enters the valve body, the water inlet detection component switches to the warning state and generates a current signal, and the current signal is transmitted to the battery pack control system through the first electrical connection line and the low-voltage wiring harness.

2. The explosion-proof valve according to claim 1, characterized in that: The valve body comprises: A main body, wherein the main body has a pressure detection member; A valve cover, the valve cover is arranged on one side of the axial direction of the main body; A protective member, wherein the protective member is arranged on the other axial side of the main body, the pressure detection member is arranged inside the protective member, and the water inlet detection member is arranged on the protective member.

3. The explosion-proof valve according to claim 2, characterized in that: A groove is formed on the protective member; The water inlet detection component comprises: An induction ring, the induction ring is arranged in the groove, and the induction ring is a heat release component when it comes into contact with water; A temperature detection terminal, two ends of which are respectively connected to the induction ring and the one end of the first electrical connection line.

4. The explosion-proof valve according to claim 2, characterized in that: A groove is formed on the protective member; The water inlet detection component is a detection harness, which is arranged in the groove and connected to the first electrical connection line. The detection harness is conductive when encountering water and generates the current signal.

5. The explosion-proof valve according to claim 4, characterized in that: The detection harness comprises: a first detection wire; a second detection wire; an insulating bobbin, wherein a spiral structure is formed on the insulating bobbin, and the first detection wire and the second detection wire are wound around the spiral structure; Wherein, when the water inlet detection component is switched to the warning state, the first detection wire is connected to the second detection wire.

6. The explosion-proof valve according to claim 2, characterized in that: The side wall of the protective member is formed with a plurality of water inlet holes, and the plurality of water inlet holes are spaced apart along the circumference of the protective member; The water inlet detection component is a humidity sensor, and the humidity sensor is arranged in the protective component. The one end of the first electrical connection line passes through the protective component and is connected to the humidity sensor.

7. The explosion-proof valve according to any one of claims 2 to 6, characterized in that: The protective element comprises: A protective body, wherein the pressure detection element is arranged in the protective body; A mounting portion, the mounting portion being disposed on a side of the protection body adjacent to the valve cover, the outer diameter of the mounting portion being larger than the outer diameter of the protection body; Wherein, the water inlet detection component is arranged in the installation part or the protective body.

8. The explosion-proof valve according to claim 7, characterized in that: The protective element also includes: A plurality of connection parts, two ends of each of the connection parts are respectively connected to the protection body and the mounting part, and the plurality of connection parts are spaced apart along the circumference of the protection body.

9. A battery pack, characterized in that: Comprising an explosion-proof valve according to any one of claims 1-8.

10. A vehicle, characterized in that: Comprising the battery pack according to claim 9.

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