Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a box body which is provided with a through hole, and the hole wall of the through hole is provided with a first matching part; the explosion-proof assembly comprises a main body, a sheath and a movable part movably arranged on the main body, and the movable part is provided with an opening position for communicating the inside and the outside of the box body and a sealing position for sealing the box body; the main body is arranged in the through hole in a sealed mode, the sheath is arranged on the main body in a sleeving mode, and a second matching part detachably connected with the first matching part is arranged on the sheath. The main body is arranged in the through hole in a sealing manner, and the sheath on the main body can be connected with the first matching part on the hole wall of the through hole through the second matching part, so that the explosion-proof assembly is fixedly connected with the box body through the sheath, and the through hole in the box body is sealed; and the fixing position between the explosion-proof assembly and the box body is between the sheath and the hole wall of the through hole, so that a gap between the explosion-proof assembly and the box body can be reduced, and the probability that external impurities enter the gap to influence the structure of the battery device is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Art

[0002] With the development of new energy fields, batteries have been used more and more widely. As the core components of electrical equipment, the safety performance of batteries is crucial.

[0003] During the battery's cycle, heat and gas are generated inside the battery. Therefore, an explosion-proof valve is required to release pressure in the battery box to maintain the pressure balance inside and outside the box. However, in the current explosion-proof valve structure, a gap is easily formed between the explosion-proof valve and the box, causing external impurities to enter the gap and affect the battery structure. Utility Model Content

[0004] Based on this, it is necessary to provide a battery device and electrical equipment to address the problem that a gap is easily formed between the current explosion-proof valve and the box body, causing external impurities to enter the gap and affect the battery structure.

[0005] In the first aspect, the present application provides a battery device, including a box and an explosion-proof component, wherein a through hole is provided on the box, and a first matching portion is provided on the hole wall of the through hole; the explosion-proof component includes a main body, a sheath, and a movable part movably provided on the main body, and the movable part has an open position connecting the inside and outside of the box body and a sealed position sealing the box body. The main body is sealed in the through hole, the sheath is sleeved on the main body, and a second matching portion detachably connected to the first matching portion is provided on the sheath, so that the explosion-proof component is fixedly connected to the box body through the sheath.

[0006] Through the above structure, since the explosion-proof component is connected by the second matching portion on the sheath extending into the through hole and the first matching portion on the hole wall of the through hole, on the one hand, there is no need to introduce an additional connection structure, making the overall structure simpler; on the other hand, the connection between the first matching portion and the second matching portion can reduce the probability of a gap being generated between the box body and the explosion-proof component, thereby reducing the probability of external impurities entering the gap and affecting the battery structure.

[0007] In some embodiments, the first matching portion is a first thread, and the second matching portion is a second thread disposed on the outer circumferential surface of the sleeve. The sleeve is fixedly connected to the through hole by the first thread and the second thread that are threadedly connected to each other.

[0008] By providing the first thread and the second thread that cooperate with each other, the quick connection and fixation of the sheath in the through hole can be achieved, and the structure is simple and easy to operate.

[0009] In some embodiments, the thickness of the sheath ranges from 0.5 mm to 1 mm. Therefore, setting the thickness of the sheath within the above range can facilitate the provision of threads on the outer peripheral surface of the sheath, thereby achieving screw connection between the sheath and the hole wall of the through hole, so that the explosion-proof component can be stably arranged on the box body through the sheath, and the through hole can be sealed.

[0010] In some embodiments, the main body includes a valve body and a guide rod, a connecting port and a first flow port located on the periphery of the connecting port are provided on the valve body, one end of the guide rod extends into the through hole, and the other end is passed through the connecting port and fixedly connected to the movable part, and the sheath is sleeved on the periphery of the guide rod; the valve body is sealed and connected to the box body, and a second flow port located on the periphery of the through hole is provided on the box body; when the movable part is in the open position, a flow gap is formed between the movable part and the valve body, and the first flow port, the second flow port and the flow gap are connected together to form a flow channel.

[0011] Through the above structure, the movable part can drive the guide rod to move relative to the valve body. When the movable part moves to the open position, a flow gap is formed between the movable part and the valve body. At this time, the gas inside the box body can be discharged through the flow channel to achieve smooth pressure relief of the box body.

[0012] In some embodiments, the explosion-proof assembly further includes a first sealing ring, a first annular groove is provided on a surface of the valve body facing the housing, and the first sealing ring is clamped in the first annular groove to achieve a sealed connection between the valve body and the housing.

[0013] Therefore, by providing the first sealing ring, sealing between the valve body and the box body can be achieved, thereby achieving sealing of the through hole by the explosion-proof component.

[0014] In some embodiments, the explosion-proof assembly also includes a second sealing ring, and a second annular groove is opened on the side surface of the valve body facing away from the box body. The second sealing ring is clamped in the second annular groove to achieve a sealed connection between the movable part and the valve body when the movable part is in the sealing position.

[0015] Thus, when the movable part is located at the sealing position, the second sealing ring can seal the movable part and the valve body, so that the movable part seals the through hole at the sealing position and the interior of the box body remains sealed.

[0016] In some embodiments, the explosion-proof assembly further includes an elastic member, which is sleeved around the outer periphery of the guide rod and located between the guide rod and the sheath, and is used to provide an elastic restoring force for the movable member to drive the guide rod to return from an open position to a sealed position.

[0017] Through the above structure, the movable part can drive the guide rod to smoothly switch between the opening position and the sealing position, thereby smoothly realizing the opening or closing of the through hole.

[0018] In some embodiments, one end of the guide rod located in the through hole has a limiting step, one end of the elastic member abuts against the valve body, and the other end abuts against the limiting step.

[0019] Through the above structure, the elastic member can smoothly provide elastic force to the guide rod, so that the guide rod can better block the through hole and maintain the sealing performance of the internal environment of the box.

[0020] In some embodiments, the shape of the valve body is at least one of a circle, a hexagon, and a rectangle. Through the above structure, the valve body can better drive the sleeve to rotate, thereby fixing the sleeve more stably in the through hole, and realizing a stable connection between the explosion-proof component and the box.

[0021] In a second aspect, the present application also provides an electrical device, comprising the battery device as described above.

[0022] The above-mentioned battery device and electrical equipment have the main body sealed in the through hole, and the sheath on the main body can be connected to the first matching portion on the hole wall of the through hole through the second matching portion, so that the explosion-proof component is fixedly connected to the box body through the sheath, and the through hole on the box body is sealed. In this way, the fixed position between the explosion-proof component and the box body is between the sheath and the hole wall of the through hole, which can reduce the gap between the explosion-proof component and the box body, and reduce the probability of external impurities entering the gap and affecting the battery structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a battery device according to one or more embodiments.

[0024] Figure 2 It is a schematic diagram of the structure in which an explosion-proof component is arranged on a box body according to one or more embodiments.

[0025] Figure 3 is a partial schematic diagram of a box according to one or more embodiments.

[0026] Figure 4 is a cross-sectional view of an explosion-proof assembly according to one or more embodiments.

[0027] Figure 5 is a perspective view of an explosion-proof assembly according to one or more embodiments.

[0028] Figure 6 is an exploded view of an explosion-proof assembly according to one or more embodiments.

[0029] Explanation of the reference numerals: 100, battery device; 10, housing; 20, explosion-proof component; 11, through hole; 12, first matching portion; 13, second flow port; 21, main body; 22, sheath; 23, movable part; 24, first sealing ring; 25, second sealing ring; 26, elastic part; 211, valve body; 212, guide rod; 213, connecting port; 214, first flow port; 215, limiting step; 221, second matching portion. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0036] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0037] A battery cell is the smallest unit that makes up a battery. A battery cell usually includes an outer shell and an electrode assembly. The outer shell includes a top cover and a shell. The shell has an opening, and a top cover sealing cover is arranged at the opening. Thus, the top cover and the shell together enclose a receiving cavity, and the electrode assembly is placed in the receiving cavity.

[0038] The electrode assembly is the part of the battery cell where the electrochemical reaction actually occurs. During the cycle, the battery cell generates heat and gas. Therefore, as the battery is cycled, the air pressure inside the box gradually increases. When the air pressure reaches a certain threshold, it will break through the box and be discharged. Based on this, explosion-proof components such as explosion-proof valves need to be installed on the box to release pressure in order to maintain the balance of air pressure inside and outside the box.

[0039] In the current explosion-proof valve structure, firstly, a sealing ring is provided between the explosion-proof valve and the casing for sealing. At the same time, the explosion-proof valve is connected to the casing around it by rivet nuts. Thus, a gap is easily formed between the explosion-proof valve and the casing at the position between the sealing ring and the rivet nuts. Impurities such as chlorides, pollutants, metal chips, dust, and water vapor can easily enter the gap, resulting in increased internal acidification and destruction of the passivation film on the metal surface, thereby causing corrosion and other problems.

[0040] Based on the above considerations, in order to solve the problem that a gap is easily formed between the current explosion-proof valve and the box body, causing external impurities to enter the gap and affect the battery structure, a battery device is provided in one or more embodiments of the present application, in which a main body seal is set in a through hole, and the sheath on the main body can be connected to the first matching part on the hole wall of the through hole through the second matching part, so that the explosion-proof component is fixedly connected to the box body through the sheath, and the sealing of the through hole on the box body is achieved. In this way, the fixed position between the explosion-proof component and the box body is between the sheath and the hole wall of the through hole, which can reduce the gap between the explosion-proof component and the box body, and reduce the probability of external impurities entering the gap and affecting the battery structure.

[0041] It should be noted that the battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar.

[0042] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells. As an example, a battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0043] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0044] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0045] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0046] See also Figure 1 , Figure 2 as well as Figure 3 An embodiment of the present application provides a battery device 100, including a box body 10 and an explosion-proof assembly 20. The box body 10 is provided with a through hole 11, and the hole wall of the through hole 11 is provided with a first matching portion 12. The explosion-proof assembly 20 includes a main body 21, a sheath 22, and a movable member 23 movably arranged on the main body 21, and the movable member 23 has an open position for connecting the inside and outside of the box body 10 and a sealed position for sealing the box body 10. The main body 21 is sealedly arranged in the through hole 11, and the sheath 22 is sleeved on the main body 21, and a second matching portion 221 detachably connected to the first matching portion 12 is provided on the sheath 22, so that the explosion-proof assembly 20 is fixedly connected to the box body 10 through the sheath 22.

[0047] It should be noted that the battery device 100 also includes a battery cell disposed inside the box 10. The box 10 may include a box body and a cover body, and the box body and the cover body together enclose a receiving cavity for receiving the battery cell. The through hole 11 may be provided on the cover body or on the box body.

[0048] For ease of understanding, the following description will be made by taking the through hole 11 formed on the cover as an example, wherein a first matching portion 12 is disposed on the hole wall of the through hole 11 .

[0049] The explosion-proof component 20 is a structure disposed in the through hole 11 and can be actuated to release pressure when the pressure inside the battery device 100 reaches a certain threshold. The explosion-proof component 20 includes a main body 21, a sheath 22, and a movable part 23. The main body 21 is a structure capable of sealing with the through hole 11. The sheath 22 is disposed on the main body 21, and a second matching portion 221 is disposed on the sheath 22.

[0050] When the main body 21 is sealed in the through hole 11, at least part of the sleeve 22 extends into the through hole 11, so that the sleeve 22 can be connected to the first matching portion 12 on the hole wall of the through hole 11 through the second matching portion 221, so that the explosion-proof component 20 can be fixedly connected to the box body 10 through the sleeve 22, the explosion-proof component 20 is fixedly set on the box body 10, and the through hole 11 is sealed.

[0051] Through the above structure, since the explosion-proof component 20 is connected with the first matching portion 12 on the hole wall of the through hole 11 by the second matching portion 221 on the sleeve 22 extending into the through hole 11, on the one hand, there is no need to introduce an additional connection structure, so that the overall structure is simpler; on the other hand, compared with the current method of connecting the explosion-proof valve and the box body through a rivet nut or other external connection structure, the first matching portion 12 of the present application is directly arranged on the hole wall of the through hole 11 of the box body 10, and the second matching portion 221 is directly arranged on the sleeve 22, that is, the connection between the first matching portion 12 and the second matching portion 221 is the direct matching between the box body 10 and the sleeve 22, thereby, the connection between the first matching portion 12 and the second matching portion 221 can reduce the probability of a gap between the box body 10 and the explosion-proof component 20, thereby reducing the probability of external impurities entering the gap and affecting the structure of the battery device 100.

[0052] like Figure 3 and Figure 4 As shown, in some embodiments, the first matching portion 12 is a first thread, the second matching portion 221 is a second thread disposed on the outer circumference of the sleeve 22, and the sleeve 22 is fixedly connected to the through hole 11 by the first thread and the second thread that are screwed together.

[0053] Specifically, the first matching portion 12 is configured as a first thread, that is, a first thread is provided on the hole wall of the through hole 11, and the first thread is an internal thread. The second matching portion 221 is a second thread, that is, a second thread is provided on the outer circumference of the sleeve 22, and the second thread is an external thread.

[0054] When the main body 21 is sealed and disposed in the through hole 11, at least a portion of the sheath 22 extends into the through hole 11. At this time, the external thread on the sheath 22 and the internal thread on the hole wall of the through hole 11 are screwed together to achieve screw connection and fixation between the sheath 22 and the through hole 11. When the sheath 22 is fixed in the through hole 11, since the sheath 22 is disposed on the main body 21, the main body 21 and the box body 10 are fixedly connected, thereby achieving fixation of the explosion-proof assembly 20 on the box body 10.

[0055] By providing the first thread and the second thread that cooperate with each other, the sheath 22 can be quickly connected and fixed in the through hole 11, and the structure is simple and easy to operate.

[0056] In addition, in some other embodiments, the first matching portion 12 and the second matching portion 221 can also be set as other connection structures. For example, the first matching portion 12 and the second matching portion 221 can be set as mutually snap-fitting buckles and slots, which can also realize the connection and fixation of the sheath 22 in the through hole 11, which will not be elaborated here.

[0057] In some embodiments, the thickness of the sheath 22 ranges from 0.5 mm to 1 mm.

[0058] It should be noted that in the current explosion-proof valve structure, the thickness of the sheath 22 is usually set between 0.2mm and 0.3mm. Based on this, the thickness of the sheath 22 is increased in the present application and is set between 0.5mm and 1mm, which is more conducive to providing threads on the outer peripheral surface of the sheath 22 so that it can be connected and fixed to the hole wall of the through hole 11 through the threads.

[0059] Therefore, setting the thickness of the sleeve 22 within the above range can be more conducive to opening a thread on the outer peripheral surface of the sleeve 22, thereby achieving a screw connection between the sleeve 22 and the hole wall of the through hole 11, so that the explosion-proof component 20 can be stably set on the box body 10 through the sleeve 22 and achieve the sealing of the through hole 11.

[0060] Furthermore, the thickness of the sheath 22 can be set to range from 0.7 mm to 0.8 mm.

[0061] Furthermore, setting the thickness of the sheath 22 between 0.7 mm and 0.8 mm not only enables smooth threading on the outer peripheral surface of the sheath 22, thereby achieving threaded connection of the sheath 22 in the through hole 11, but also further reduces the space occupied by the sheath 22 in the through hole 11, allowing the through hole 11 to better achieve exhaust or liquid injection.

[0062] like Figure 5 As shown, in some embodiments, the main body 21 includes a valve body 211 and a guide rod 212, the valve body 211 is provided with a connection port 213 and a first flow port 214 located at the periphery of the connection port 213, one end of the guide rod 212 extends into the through hole 11, and the other end is arranged in the connection port 213 and fixedly connected with the movable member 23, and the sheath 22 is sleeved on the periphery of the guide rod 212. The valve body 211 is sealedly connected to the box body 10, and the box body 10 is provided with a second flow port 13 located at the periphery of the through hole 11. When the movable member 23 is in the open position, a flow gap is formed between the movable member 23 and the valve body 211, and the first flow port, the second flow port 13 and the flow gap are connected together to form a flow channel.

[0063] Specifically, the valve body 211 is a structure disposed on the box body 10 for realizing the opening or closing of the through hole 11. A connecting port is formed through the valve body 211, and the connecting port can realize the connection and fixation between the guide rod 212 and the valve body 211.

[0064] Furthermore, the valve body 211 is provided with a first flow port 214 surrounding the outer periphery of the connection port 213, and at the same time, the box body 10 is provided with a second flow port 13 located at the outer periphery of the through hole 11. Thus, when the movable member 23 is located at the open position, a flow gap can be formed between the movable member 23 and the valve body 211, so that the first flow port 214, the second flow port 13 and the flow gap are connected to form a flow channel.

[0065] The open position means that the movable part 23 moves toward the side away from the valve body 211 to form a flow gap between the movable part 23 and the valve body 211. At this time, the first flow port 214, the second flow port 13 and the flow gap are interconnected to form a flow channel. When the movable part 23 is in the open position, the interior of the battery device 100 is connected to the external environment, so that the gas exchange between the interior and exterior of the battery device 100 can be achieved, and the gas pressure inside the battery cell can be balanced.

[0066] The sealing position means that the movable member 23 is sealed and connected to the valve body 211, and there is no gap between them. Therefore, when the movable member 23 is in the sealing position, a sealed environment is formed inside the battery device 100, which is isolated from the external environment.

[0067] During specific use, in the initial state, the movable member 23 can be kept in a sealed position under the action of an external force, and the interior of the battery device 100 is a sealed environment.

[0068] When the air pressure inside the battery device 100 reaches a certain threshold, the movable part 23 is switched from the sealing position to the open position under the impact of the gas, so that a flow gap is formed between the movable part 23 and the valve body 211, and the first flow port 214, the second flow port 13 and the flow gap are interconnected to form a flow channel for gas discharge, so that the inside of the battery device 100 is connected with the external environment, thereby balancing the air pressure inside the battery device 100.

[0069] Through the above structure, the movable member 23 can open or close the box body 10, and can smoothly release the pressure inside the battery device 100 and balance the internal air pressure of the battery device 100.

[0070] Please also see Figure 2 , Figure 4 as well as Figure 6 In some embodiments, the explosion-proof component 20 further includes a first sealing ring 24 , and a first annular groove is provided on a surface of the valve body 211 facing the box body 10 , and the first sealing ring 24 is clamped in the first annular groove to achieve a sealed connection between the valve body 211 and the box body 10 .

[0071] Specifically, a first annular groove is formed on the surface of the valve body 211 facing the housing 10, and the first sealing ring 24 is clamped in the first annular groove. The sleeve 22 is inserted into the through hole 11 and connected by threads. As the threads are tightened, the first sealing ring 24 abuts against the surface of the housing 10 and seals with the housing 10 to achieve sealing of the through hole 11.

[0072] Therefore, by providing the first sealing ring 24 , sealing between the valve body 211 and the box body 10 can be achieved, thereby achieving sealing of the through hole 11 by the explosion-proof component 20 .

[0073] In some embodiments, the explosion-proof component 20 also includes a second sealing ring 25, and a second annular groove is opened on the side surface of the valve body 211 facing away from the box body 10. The second sealing ring 25 is clamped in the second annular groove to achieve a sealed connection between the movable part 23 and the valve body 211 when the movable part 23 is in the sealing position.

[0074] Specifically, a second annular groove is provided on the surface of the valve body 211 on one side facing away from the housing 10, and the second annular groove surrounds the outer periphery of the connection port 213 and the first flow port 214 provided on the valve body 211. In this way, the second sealing ring 25 is clamped in the second annular groove, and under the sealing effect of the second sealing ring 25, a sealed connection between the movable part 23 and the valve body 211 can be achieved, that is, the movable part 23 is in a sealed position.

[0075] Through the above structure, when the movable part 23 is located at the sealing position, the second sealing ring 25 can seal the movable part 23 and the valve body 211, so that the movable part 23 seals the through hole 11 at the sealing position, and the inside of the box body 10 remains sealed.

[0076] In some embodiments, the explosion-proof assembly 20 further includes an elastic member 26, which is sleeved around the outer periphery of the guide rod 212 and located between the guide rod 212 and the sheath 22. The elastic member 26 is used to provide an elastic restoring force for the movable member 23 to drive the guide rod 212 to return from the open position to the sealed position.

[0077] Specifically, the elastic member 26 can be, but is not limited to, a spring, which is sleeved around the outer periphery of the guide rod 212 and located between the guide rod 212 and the sheath 22. In the initial state, the spring is in a compressed state, that is, the spring can provide elastic force to keep the guide rod 212 in the sealed position, thereby sealing the box body 10. When the internal air pressure of the battery device 100 reaches a threshold value, the gas impact force overcomes the spring elastic force, so that the movable member 23 switches from the sealed position to the open position. At this time, the first flow port 214, the second flow port 13 and the flow gap are interconnected to form a flow channel, so that the box body 10 is opened and the gas inside the battery device 100 can be discharged smoothly.

[0078] When the gas is exhausted, the gas impact force disappears, and the movable member 23 drives the guide rod 212 to switch from the open position to the sealed position again under the action of the elastic restoring force of the spring, so as to keep the sealing of the box body 10 in time.

[0079] Through the above structure, the movable member 23 can drive the guide rod 212 to smoothly switch between the open position and the sealed position, thereby smoothly realizing the opening or closing of the through hole 11.

[0080] In some embodiments, one end of the guide rod 212 located in the through hole 11 has a limiting step 215 , one end of the elastic member 26 abuts against the valve body 211 , and the other end abuts against the limiting step 215 .

[0081] Specifically, a limiting step 215 is formed at one end of the guide rod 212 located in the through hole 11. When the spring is sleeved on the guide rod 212, one end of the spring can abut against the valve body 211, and the other end abuts against the limiting step 215. Thus, the spring can provide a stable elastic force to the guide rod 212, so that the guide rod 212 can better block the through hole 11.

[0082] Through the above structure, the elastic member 26 can smoothly provide elastic force to the guide rod 212 , so that the guide rod 212 can better block the through hole 11 and maintain the sealing performance of the internal environment of the box body 10 of the battery device 100 .

[0083] In some embodiments, the shape of the valve body 211 is at least one of circular, hexagonal, and rectangular.

[0084] Specifically, the shape of the valve body 211 can be, but is not limited to, circular, hexagonal, and rectangular. As a preferred embodiment, the shape of the valve body 211 can be hexagonal. Thus, the valve body 211 can be better connected with external tools, for example, the valve body 211 is fixed with a wrench, and then the valve body 211 is driven to rotate by the wrench, thereby achieving a screw connection between the sheath 22 and the through hole 11, so that the sheath 22 is more stably arranged in the through hole 11.

[0085] Through the above structure, the valve body 211 can better drive the sleeve 22 to rotate, so that the sleeve 22 is more stably fixed in the through hole 11, and a stable connection between the explosion-proof component 20 and the box body 10 is achieved.

[0086] Based on the same concept as the above structure, the present application also provides an electrical device, including the battery device as described above.

[0087] According to one or more embodiments, firstly, a through hole 11 is opened on the cover of the box body 10 , the sleeve 22 is inserted into the through hole 11 , and the valve body 211 is rotated to drive the sleeve 22 to rotate, so that the sleeve 22 is tightened in the through hole 11 .

[0088] During the process of tightening the sheath 22 , the first sealing ring 24 between the valve body 211 and the cover body undergoes elastic deformation and is compressed between the valve body 211 and the cover body, thereby achieving sealing between the two.

[0089] When the sheath 22 is tightened, the explosion-proof assembly 20 is fixed on the cover body and seals the through hole 11 on the cover body. At this time, the movable part is in a sealed position under the elastic force of the spring, that is, the internal environment of the battery device 100 remains sealed.

[0090] As the battery device 100 circulates, when the internal air pressure of the battery device 100 reaches a certain threshold, the gas impacts the movable part through the second flow port 13 on the box body 10 and the first flow port on the valve body 211, switching the movable part from the sealed position to the open position. At this time, a flow gap is formed between the movable part and the valve body, and the first flow port, the second flow port 13 and the flow gap are connected to form a flow channel, so that the gas can be discharged smoothly from the flow channel to achieve pressure relief.

[0091] After the pressure relief is completed, the impact force of the gas disappears, and the movable part is driven by the spring to return to the sealing position from the open position, and the box body 10 is re-sealed.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein a through hole is formed on the box body, and a first matching portion is formed on a hole wall of the through hole; and An explosion-proof component comprises a main body, a sleeve and a movable part movably arranged on the main body, wherein the movable part has an open position connecting the inside and outside of the box body and a sealing position sealing the box body; the main body is sealed in the through hole, the sleeve is sleeved on the main body, and a second matching part detachably connected to the first matching part is arranged on the sleeve, so that the explosion-proof component is fixedly connected to the box body through the sleeve.

2. The battery device according to claim 1, characterized in that: The first matching portion is a first thread, and the second matching portion is a second thread arranged on the outer peripheral surface of the sleeve. The sleeve is fixedly connected to the through hole by the first thread and the second thread which are threadedly connected to each other.

3. The battery device according to claim 2, characterized in that: The thickness of the sheath ranges from 0.5 mm to 1 mm.

4. The battery device according to any one of claims 1 to 3, characterized in that: The main body comprises a valve body and a guide rod, the valve body is provided with a connection port and a first flow port located at the periphery of the connection port, one end of the guide rod extends into the through hole, the other end is passed through the connection port and fixedly connected to the movable part, and the sheath is sleeved on the periphery of the guide rod; The valve body is sealedly connected to the box body, and the box body is provided with a second flow port located at the periphery of the through hole; When the movable member is located at the open position, a flow gap is formed between the movable member and the valve body, and the first flow port, the second flow port and the flow gap are connected together to form a flow channel.

5. The battery device according to claim 4, characterized in that: The explosion-proof component also includes a first sealing ring. A first annular groove is formed on a surface of the valve body facing the box body. The first sealing ring is clamped in the first annular groove to achieve a sealed connection between the valve body and the box body.

6. The battery device according to claim 4, characterized in that: The explosion-proof component also includes a second sealing ring. A second annular groove is formed on a surface of the valve body facing away from the box body. The second sealing ring is clamped in the second annular groove to achieve a sealed connection between the movable part and the valve body when in the sealing position.

7. The battery device according to claim 4, characterized in that: The explosion-proof component also includes an elastic member, which is sleeved on the outer periphery of the guide rod and located between the guide rod and the sheath. The elastic member is used to provide an elastic restoring force for the movable member to drive the guide rod to return from the open position to the sealed position.

8. The battery device according to claim 7, characterized in that: One end of the guide rod located in the through hole has a limiting step, one end of the elastic member abuts against the valve body, and the other end abuts against the limiting step.

9. The battery device according to claim 4, characterized in that: The shape of the valve body is at least one of circular, hexagonal and rectangular.

10. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 9.

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