Battery devices and electrical equipment

Abstract

This application relates to a battery device and an electrical appliance. The battery device includes: a housing with a vent hole; and a balance valve, sealed within the vent hole, for balancing the air pressure inside and outside the housing. The balance valve includes a first valve body and a waterproof and breathable component. The first valve body has a balance channel for gas flow, and the waterproof and breathable component is disposed within the balance channel. The first valve body includes a main body and a pressure-blocking part connected to each other, and the waterproof and breathable component is fixedly pressed between the main body and the pressure-blocking part along the gas flow direction. This application can achieve pressure balance inside and outside the housing through the balance valve. When the pressure difference between the inside and outside of the housing is large, gas can enter or exit the housing through the balance channel to achieve pressure balance. Simultaneously, fixing the waterproof and breathable component between the main body and the pressure-blocking part of the first valve body along the gas flow direction makes the waterproof and breathable component more stable and improves reliability during use.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] During use, both the internal pressure and the external environmental pressure of a battery device change. For example, the battery generates heat and gas during cycling, causing changes in the internal pressure. Furthermore, the external pressure of the battery device varies depending on its installation environment. Therefore, a structure is needed on the battery device to balance the internal and external pressures, making the battery cycling process more stable.

[0003] However, the current balancing structure on the battery device is unstable, resulting in unstable internal and external air pressure, which affects the reliability of the battery device during use. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device and electrical equipment to address the problem that the current battery device has an unstable balancing structure, which leads to unstable internal and external air pressure and affects the reliability of the battery device during use.

[0005] In a first aspect, this application provides a battery device, including a housing and a balance valve, wherein a vent hole is provided on the housing; the balance valve is sealed in the vent hole for balancing the air pressure inside and outside the housing; the balance valve includes a first valve body and a waterproof and breathable component, wherein a balance channel for gas flow is formed inside the first valve body, and the waterproof and breathable component is disposed in the balance channel.

[0006] The first valve body includes a main body and a pressure-resistant part that are connected to each other, and the waterproof and breathable component is fixed between the main body and the pressure-resistant part along the gas flow direction.

[0007] By incorporating waterproof and breathable components, the gas inside and outside the chamber can flow smoothly through the balancing channel, achieving a balance of air pressure inside and outside the chamber. Simultaneously, the waterproof and breathable components are fixed along the gas flow direction between the main body and the pressure-resistant part of the first valve body, making the installation of the waterproof and breathable components more stable and improving reliability during use.

[0008] In some embodiments, the main body and the pressure-resistant part are integrally formed. This enhances the mechanical strength of the first valve body and makes the waterproof and breathable component more stable between the main body and the pressure-resistant part. Furthermore, the integrally formed structure reduces the overall number of parts in the balance valve, simplifying the assembly process.

[0009] In some embodiments, the main body includes a piston portion and a guide rod portion, the piston portion and the guide rod portion being integrally formed, and a balance channel being formed inside the guide rod portion.

[0010] The above structure enables the first valve body to be installed on the housing, and the piston and guide rod are integrally formed, which can effectively improve the overall strength of the first valve body and make the waterproof and breathable parts more stably installed on the first valve body.

[0011] In some embodiments, both the main body and the pressure-retaining part are plastic parts. This allows for integral injection molding of the main body and the pressure-retaining part, enabling the waterproof and breathable part to be more stably positioned between the main body and the pressure-retaining part, thereby improving the stability of the waterproof and breathable part.

[0012] In some embodiments, the balancing valve further includes a second valve body and a cover. The second valve body is sealed within a vent hole, and the first valve body is disposed between the second valve body and the cover. The second valve body has a first through hole that connects the interior of the housing with the balancing channel. A first gap that communicates with the external environment is formed between the cover and the first valve body. The first gap, the balancing channel, and the first through hole are interconnected and form a venting passage.

[0013] Thus, a ventilation passage is successfully formed through the first gap, the balance channel, and the first through hole. The ventilation passage can connect the inside and outside of the box to achieve air pressure balance inside and outside the box.

[0014] In some embodiments, a first limiting member is formed on the side surface of the cover facing the first valve body, and the first limiting member is used to abut against the pressing part.

[0015] Therefore, the above structure can further support and limit the pressure-absorbing part, thereby improving the stability of the waterproof and breathable component between the main body and the pressure-absorbing part.

[0016] In some embodiments, the cover is constructed as a plastic part, and the interior of the cover has a first receiving cavity for receiving a metal insert.

[0017] Based on this, by forming a first receiving cavity inside the cover body through injection molding and placing the metal insert inside the first receiving cavity, the overall structure of the metal insert and the cover body can be made more stable and the structure is simpler.

[0018] In some embodiments, the second valve body is further provided with a second through hole communicating with the interior of the housing. The first valve body is movably disposed relative to the second valve body and has an open position for communicating with the second through hole and an open position for sealing the second through hole.

[0019] The above structure allows the first valve body and the second valve body to work together to balance air pressure and release pressure, making the battery device more reliable during use.

[0020] In some embodiments, the main body includes a piston portion and a guide rod portion connected to each other, the interior of the second valve body has a second receiving cavity for accommodating the guide rod portion, the second receiving cavity is in communication with the first through hole; the piston portion is located between the second valve body and the cover body, and forms a second gap with the second valve body that is in communication with the second through hole; the balance valve also includes a first sealing element that is sealed in the second gap.

[0021] The above structure allows for the successful sealing and opening of the second through hole, enabling the battery device to release pressure smoothly.

[0022] In some embodiments, the balance valve further includes a second limiting member and an elastic member both disposed in the second receiving cavity. The second limiting member is sleeved on one end of the guide rod portion away from the piston portion, and the elastic member is sleeved on the outer periphery of the guide rod portion and abuts against the second limiting member and the second valve body along the gas flow direction. The elastic member is used to provide elastic restoring force for the first valve body to return from the open position to the sealed position.

[0023] By setting a second limiting element and an elastic element, the first valve body can smoothly switch between the open position and the sealed position, so as to achieve smooth pressure relief of the battery device.

[0024] In some embodiments, the second limiting member includes a base plate and a side plate surrounding the outer periphery of the base plate, and a third through hole is provided on the base plate, which communicates with the first through hole and the balance channel respectively; wherein, the elastic member abuts between the side plate and the second valve body.

[0025] Through the above structure, the second limiting member and the second valve body can cooperate with each other to provide a supporting foundation for the elastic member, so that the elastic member can smoothly provide the elastic restoring force for the first valve body to return from the open position to the sealed position, thereby realizing the smooth depressurization of the battery device.

[0026] In some embodiments, a snap-fit ​​member protrudes from the inner wall of the side plate, and a slot is provided on the outer periphery of the guide rod portion. The snap-fit ​​member and the slot engage to fix the second limiting member to the guide rod portion.

[0027] The second limiting member and the guide rod can be quickly connected and fixed by the interlocking snap-fit ​​parts and slots.

[0028] In some embodiments, the slot includes a first slot and a second slot, the first slot extending axially along the guide rod portion, and one end of the first slot being formed as a slot into which a snap-fit ​​member can be inserted, the other end of the first slot communicating with the second slot, and the second slot extending circumferentially along the guide rod portion.

[0029] With the above structure, the second limiting member is sleeved on the bottom end of the guide rod, and by rotating the second limiting member, the snap-fit ​​member is more stably engaged in the slot, thereby improving the connection stability between the second limiting member and the guide rod.

[0030] In some embodiments, the balancing valve further includes a second seal, which is disposed between the second valve body and the housing.

[0031] Therefore, by setting a second sealing element, the sealing performance of the second valve body on the housing can be improved.

[0032] In some embodiments, the balancing valve further includes a moisture-blocking component disposed within the balancing channel, which allows gas to pass through and blocks impurities other than gas.

[0033] By setting up moisture-blocking components, it is possible to achieve gas balance inside and outside the chamber while blocking liquids or other impurities from the external environment, thus maintaining the environment inside the chamber.

[0034] Secondly, this application also provides an electrical device, including the battery device described above.

[0035] The aforementioned battery device and electrical equipment have a balance valve installed on the housing, which can balance the air pressure inside and outside the housing. Specifically, the waterproof and breathable component allows gas to pass through. When the air pressure difference between the inside and outside of the housing is large, gas can enter or exit the housing through the balance channel to achieve air pressure balance. At the same time, the waterproof and breathable component is fixed between the main body and the pressure-blocking part of the first valve body along the gas flow direction, making the installation of the waterproof and breathable component more stable and improving the reliability during use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a battery device according to one or more embodiments.

[0037] Figure 2 This is a schematic diagram of the structure of a balance valve in a battery device according to one or more embodiments.

[0038] Figure 3 This is a cross-sectional view of a balance valve in a battery device according to one or more embodiments.

[0039] Figure 4 This is an exploded view of a balance valve in a battery device according to one or more embodiments.

[0040] Figure 5 This is a structural schematic diagram of the cover body in a balance valve according to one or more embodiments.

[0041] Figure 6 This is a schematic diagram of the structure of a balance valve according to one or more embodiments.

[0042] Figure 7 This is a cross-sectional view of a second limiting member in a balance valve according to one or more embodiments.

[0043] Figure 8 This is a structural schematic diagram of the second limiting member in a balance valve according to one or more embodiments.

[0044] Figure 9 This is a schematic diagram of the structure of the first valve body in a balancing valve according to one or more embodiments.

[0045] Explanation of reference numerals in the attached drawings: 100, battery device; 10, housing; 20, balance valve; 21, first valve body; 22, waterproof and breathable component; 23, second valve body; 24, cover; 25, second limiting component; 26, elastic component; 27, second sealing component; 28, moisture-proof component; 211, balance channel; 212, main body; 213, pressing part; 214, piston part; 215, guide rod part; 216, first sealing component; 217, slot; 218, first groove; 219, second groove; 231, first through hole; 232, second through hole; 233, second receiving cavity; 234, second gap; 241, first gap; 242, first limiting component; 243, first receiving cavity; 251, bottom plate; 252, side plate; 253, third through hole; 254, snap-fit ​​component. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0052] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0053] The structure of a battery device typically includes a housing and individual battery cells. The housing has a hollow interior forming a cavity, and the individual battery cells are placed inside the cavity. The housing provides good protection for the individual battery cells.

[0054] During battery cycling, individual cells generate heat and gas, causing pressure changes inside the casing. Furthermore, the operating environment of battery devices is complex, with varying air pressures. This can easily create a pressure difference between the inside and outside of the battery device, affecting its performance.

[0055] Therefore, it is necessary to install a structure on the battery device that can balance the internal and external air pressure, such as a balance valve, so that when the internal and external air pressure of the battery device changes, the internal and external air pressure can be balanced through the balance valve.

[0056] Specifically, current balance valves typically incorporate waterproof and breathable components. These components allow gas to pass through while blocking liquids and other impurities. This allows gas to smoothly enter or exit the battery device, achieving pressure balance inside and outside the battery unit.

[0057] However, current waterproof and breathable components are usually installed in the balance valve by bonding or other connection methods. When the pressure difference between the inside and outside of the battery device is too large, the connection between the waterproof and breathable component and the balance valve may be damaged, causing the balance valve to fail.

[0058] Based on the above considerations, to address the current issues of unstable installation of waterproof and breathable components within the balance valve and the low reliability of the balance valve, one or more embodiments of this application provide a battery device. The balance valve is mounted on the housing and can achieve pressure balance between the inside and outside of the housing. Specifically, the waterproof and breathable component allows gas to pass through. When the pressure difference between the inside and outside of the housing is large, gas can enter or exit the housing through the balance channel to achieve pressure balance. Simultaneously, the waterproof and breathable component is fixed along the gas flow direction between the main body and the pressure-resistant part of the first valve body, making the installation of the waterproof and breathable component more stable and improving its reliability during use.

[0059] It should be noted that the battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0060] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0061] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0062] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0063] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0064] See Figure 1 , Figure 2 as well as Figure 3 One embodiment of this application provides a battery device 100, including a housing 10 and a balance valve 20. A vent hole (not shown in the figure) is formed on the housing 10, and the balance valve 20 is sealed within the vent hole to balance the air pressure inside and outside the housing 10. The balance valve 20 includes a first valve body 21 and a waterproof and breathable component 22. A balance channel 211 for gas flow is formed inside the first valve body 21, and the waterproof and breathable component 22 is disposed within the balance channel 211. The first valve body 21 includes a main body 212 and a pressing part 213 connected to each other, and the waterproof and breathable component 22 is pressed and fixed between the main body 212 and the pressing part 213 along the gas flow direction.

[0065] It should be noted that the battery device 100 typically also includes one or more battery cells. The interior of the housing 10 is hollow, and all battery cells are housed inside the housing 10. The housing 10 protects the battery cells, enabling them to cycle stably.

[0066] The enclosure 10 typically includes a body and a cover. The body includes a bottom plate and side plates surrounding the bottom plate, with an opening at one end opposite the bottom plate. The cover is sealed at the opening so that the body and cover together enclose a space for accommodating individual battery cells.

[0067] Ventilation holes are provided on the housing 10. The ventilation holes can be provided on the bottom plate, the side plate, or the lid. The specific location of the ventilation holes can be adjusted according to the actual usage requirements of the battery device 100.

[0068] The balancing valve 20 is a component used to provide a flow channel for gas, allowing gas to flow between the inside of the housing 10 and the external environment based on the pressure difference between the inside and outside of the housing 10, thereby balancing the pressure inside and outside the housing 10. Specifically, when the pressure inside the housing 10 is lower than the pressure of the external environment, external gas can enter the housing 10 through the balancing valve 20, reducing the probability of external air pressure causing compression pressure on the internal parts of the housing 10. When the pressure inside the housing 10 is higher than the pressure of the external environment, the gas inside the housing 10 can be discharged through the balancing valve 20, reducing the probability of structural damage to the battery device 100 caused by pressure.

[0069] The balancing valve 20 is sealed within the vent hole, meaning the vent hole provides a mounting base for the balancing valve 20. The balancing valve 20 can be detachably mounted within the vent hole via bolts or other connecting components, but is not limited to this.

[0070] Furthermore, the balancing valve 20 includes a first valve body 21 and a waterproof and breathable component 22. The first valve body 21 is disposed within a vent hole, and a balancing channel 211 for gas flow is formed inside the first valve body 21. Specifically, the vent hole is opened through in a preset direction, and the axial direction of the balancing channel 211 is consistent with the opening direction of the vent hole; that is, the axial direction of the balancing channel 211 is set in a preset direction. In this way, gas inside and outside the housing 10 can better enter or exit the housing 10 through the balancing channel 211.

[0071] The waterproof and breathable component 22 refers to a structure that allows gas to pass through but blocks liquids or other impurities. Specifically, the waterproof and breathable component 22 can be configured as a waterproof and breathable membrane, which is placed within the balance channel 211. In this way, the waterproof and breathable membrane can form a barrier within the balance channel 211, allowing gas to pass smoothly through the balance channel 211 while blocking liquids and other impurities.

[0072] Furthermore, the first valve body 21 includes a main body 212 and a pressing part 213 connected to each other. The main body 212 and the pressing part 213 are spaced apart in a preset direction so that the waterproof and breathable component 22 can be sandwiched between the main body 212 and the pressing part 213 in the direction of gas flow, i.e., in the preset direction, and abut against the main body 212 and the pressing part 213 respectively.

[0073] In other words, the waterproof and breathable component 22 is clamped between the main body 212 and the pressing part 213 in a preset direction. In this way, the waterproof and breathable component 22 can be fixed and limited by the main body 212 and the pressing part 213, so that the waterproof and breathable component 22 is more stably placed in the balance channel 211.

[0074] Therefore, by setting up the waterproof and breathable component 22, the gas inside and outside the box 10 can flow smoothly through the balance channel 211, achieving a balance of air pressure inside and outside the box 10. At the same time, the waterproof and breathable component 22 is fixed between the main body 212 and the pressure-blocking part 213 of the first valve body 21 along the gas flow direction, making the setting of the waterproof and breathable component 22 more stable and improving the reliability during use.

[0075] In some embodiments, the main body 212 and the pressing part 213 are integrally formed.

[0076] Specifically, the main body 212 and the pressure-resistant part 213 are integrally formed into a single structure. This enhances the mechanical strength of the first valve body 21 and makes the waterproof and breathable component 22 more stable between the main body 212 and the pressure-resistant part 213.

[0077] In addition, the one-piece structure can reduce the number of overall parts of the balance valve 20, making the assembly process simpler.

[0078] like Figure 3 and Figure 4 As shown, in some embodiments, the main body 212 includes a piston portion 214 and a guide rod portion 215, the piston portion 214 and the guide rod portion 215 are integrally formed, and the balance channel 211 is formed inside the guide rod portion 215.

[0079] Specifically, the main body 212 can be divided into two parts: a piston part 214 and a guide rod part 215. The piston part 214 and the guide rod part are integrally formed, that is, the piston part 214, the guide rod part 215, and the pressing part 213 are all integrally formed. In this way, the first valve body 21, as a whole structure, has higher structural strength.

[0080] During the installation of the first valve body 21, the guide rod portion 215 extends into the vent hole, and the balance channel 211 is formed inside the guide rod portion 215, allowing the balance channel 211 to connect the inside and outside of the housing 10, thus enabling smooth gas flow. At the same time, the piston portion 214 can be attached to the wall of the housing 10 around the vent hole, thereby enabling the first valve body 21 to be installed on the housing 10.

[0081] With the above structure, the first valve body 21 can be installed on the housing 10, and the piston part 214 and the guide rod part 215 are integrally formed, which can effectively improve the overall strength of the first valve body 21 and make the waterproof and breathable part 22 more stably installed on the first valve body 21.

[0082] In some embodiments, both the main body 212 and the pressing part 213 are plastic parts.

[0083] Specifically, the first valve body 21 is made entirely of plastic, and the main body 212 and the pressing part 213 can be formed by injection molding.

[0084] During the manufacturing process, the main body 212 is first injection molded, and then the waterproof and breathable component 22 is fixed to the main body 212 by glue or other means. Then, the main body 212 and the waterproof and breathable component 22 are injection molded as a whole insert to form the pressure part 213.

[0085] In this way, the main body 212 and the pressure part 213 can be integrally injection molded, so that the waterproof and breathable part 22 can be more stably set between the main body 212 and the pressure part 213, thereby improving the stability of the waterproof and breathable part 22.

[0086] In some embodiments, the balancing valve 20 further includes a second valve body 23 and a cover 24. The second valve body 23 is sealed within a vent hole, and a first valve body 21 is disposed between the second valve body 23 and the cover 24. The second valve body 23 has a first through hole 231 communicating between the interior of the housing 10 and the balancing channel 211. A first gap 241 communicating with the external environment is formed between the cover 24 and the first valve body 21. The first gap 241, the balancing channel 211, and the first through hole 231 are interconnected, forming a ventilated passage.

[0087] Specifically, the second valve body 23 and the cover 24 are arranged together around the outer periphery of the first valve body 21, so that the first valve body 21 can be disposed between the second valve body 23 and the cover 24. In this way, a first gap 241 can be smoothly formed between the first valve body 21 and the cover 24, and one end of the first gap 241 is connected to the external environment, and the other end is connected to the balance channel 211.

[0088] When installing the balance valve 20, the second valve body 23 is sealed within the vent hole. The portion of the second valve body 23 located inside the housing 10 has a first through hole 231, which connects the interior of the housing 10 to the balance channel 211. For example... Figure 3 As shown by the dashed arrow, the first gap 241, the balance channel 211, and the first through hole 231 are interconnected, forming a ventilation passage. The interior of the housing 10 is connected to the external environment through the ventilation passage, thereby enabling the exchange of gases inside and outside the housing 10 and balancing the air pressure.

[0089] Thus, a ventilation passage is successfully formed through the first gap 241, the balance channel 211 and the first through hole 231. The ventilation passage can connect the inside and outside of the box 10 to achieve air pressure balance inside and outside the box 10.

[0090] like Figure 3 and Figure 5As shown, in some embodiments, a first limiting member 242 is formed on the side surface of the cover 24 facing the first valve body 21, and the first limiting member 242 is used to abut against the pressing part 213.

[0091] Specifically, the upper surface of the cover 24 faces outward from the housing 10, and the lower surface of the cover 24 faces inward from the housing 10 and towards the first valve body 21. A first limiting member 242 protrudes from the lower surface of the cover 24. The first limiting member 242 may be, but is not limited to, multiple protrusions, each protrusion being spaced apart circumferentially along the balance channel 211, and each protrusion abutting against the pressing part 213. In this way, each protrusion can further limit the pressing part 213 along a preset direction, further improving the stability of the waterproof and breathable component 22 between the main body 212 and the pressing part 213.

[0092] Therefore, the above structure can further support and limit the pressure-blocking part 213, thereby improving the stability of the waterproof and breathable part 22 between the main body part 212 and the pressure-blocking part 213.

[0093] In some embodiments, the cover 24 is constructed as a plastic part, and the interior of the cover 24 has a first receiving cavity 243 for receiving a metal insert.

[0094] Specifically, the cover 24 is made of plastic, which on the one hand reduces the overall weight of the balance valve 20; on the other hand, it can be integrally molded by injection molding, reducing the number of parts and making assembly simpler.

[0095] It should be noted that after the battery device 100 is manufactured, an airtightness test is required, specifically an airtightness test of the position of the balance valve 20. However, under normal conditions, the balance valve 20 remains open to allow gas to pass through smoothly. Therefore, a metal insert is typically provided on the cover 24. The balance valve 20 is closed by the interaction between the magnet and the metal insert, thus enabling the airtightness test.

[0096] Based on this, by forming a first receiving cavity 243 inside the cover 24 through injection molding, and placing the metal insert inside the first receiving cavity 243, the overall structure of the metal insert and the cover 24 can be made more stable and the structure is simpler.

[0097] like Figure 3 and Figure 6 As shown, in some embodiments, the second valve body 23 is further provided with a second through hole 232 communicating with the inside of the housing 10. The first valve body 21 is movably disposed relative to the second valve body 23 and has an open position for communicating the second through hole 232 with the external environment and a sealed position for sealing the second through hole 232.

[0098] It should be noted that under normal use, the battery device 100 maintains pressure balance inside and outside the housing 10 through a venting passage. However, a single battery cell may experience thermal runaway during cycling. When a single battery cell experiences thermal runaway, the pressure inside the housing 10 increases sharply. In this case, it is necessary to quickly release the gas inside the housing 10 to relieve the pressure.

[0099] Therefore, in addition to providing a mounting base for the first valve body 21, the second valve body 23 also functions as a pressure relief valve. That is, the balancing valve 20 can simultaneously balance air pressure and relieve pressure.

[0100] Specifically, the first valve body 21 is movably disposed inside the second valve body 23 along a preset direction. During its movement, the first valve body 21 has an open position and a sealed position. When the first valve body 21 is in the open position, the second through hole 232 connects the external environment and the interior of the housing 10, allowing for rapid pressure relief. When the first valve body 21 is in the sealed position, the second through hole 232 is isolated from the external environment.

[0101] When the battery device 100 is in normal use, the first valve body 21 is in a sealed position, and the second through hole 232 is isolated from the external environment. When a pressure difference occurs between the inside of the housing 10 and the external environment, the pressure balance is maintained only through the balance channel 211 and the waterproof and breathable component 22.

[0102] When some battery cells inside the housing 10 experience thermal runaway, the first valve body 21, under the impact of the internal air pressure of the housing 10, switches from a sealed position to an open position, allowing the second through hole 232 to connect the external environment and the interior of the housing 10. Gas inside the housing 10 can then be quickly discharged through the second through hole 232, thus depressurizing the battery device 100. After depressurization is complete, the first valve body 21 can be controlled to return from the open position to the sealed position, allowing the battery device 100 to continue operating.

[0103] The above structure enables the first valve body 21 and the second valve body 23 to cooperate with each other, thereby achieving the functions of balancing air pressure and releasing pressure, making the battery device 100 more reliable during use.

[0104] In some embodiments, the main body 212 includes a piston portion 214 and a guide rod portion 215 connected to each other. The interior of the second valve body 23 has a second receiving cavity 233 for accommodating the guide rod portion 215, and the second receiving cavity 233 communicates with the first through hole 231. The piston portion 214 is located between the second valve body 23 and the cover 24, and forms a second gap 234 with the second valve body 23 that communicates with the second through hole 232. The balance valve 20 also includes a first sealing member 216 that is sealed in the second gap 234.

[0105] The second valve body 23 has a second receiving cavity 233 inside, and at least a portion of the guide rod portion 215 is received within the second receiving cavity 233. A first through hole 231 is formed in the bottom wall of the second receiving cavity 233, so that the first through hole 231 connects the second receiving cavity 233 and the interior of the housing 10. In this way, the first through hole 231, the second receiving cavity 233, and the balance channel 211 are interconnected.

[0106] A piston portion 214 is disposed between the second valve body 23 and the cover 24, and a second gap 234 is formed between the piston portion 214 and the second valve body 23. Thus, when the first valve body 21 is installed between the second valve body 23 and the cover 24, the cover 24 is located above the piston portion 214, the second valve body 23 is located below the piston portion 214, and a first gap 241 and a second gap 234 are formed between the piston portion 214 and the cover 24 and the second valve body 23, respectively.

[0107] The second gap 234 communicates with the second through hole 232, and a first sealing element 216 is sealed in the second gap 234. The first sealing element 216 may be, but is not limited to, a first sealing ring, which is circumferentially disposed in the second gap 234 along the piston portion 214. That is, the top of the first sealing ring abuts against the piston portion 214, and the bottom of the first sealing ring abuts against the second valve body 23.

[0108] When the first valve body 21 is in the sealed position, the first sealing ring seals between the piston portion 214 and the second valve body 23, isolating the second through hole 232 from the external environment. When the first valve body 21 switches from the sealed position to the open position, the first valve body 21 moves away from the first sealing ring, creating a gap between the first sealing ring and the piston portion 214 or between the first sealing ring and the second valve body 23. Through this gap, the external environment communicates with the second through hole 232, thereby enabling pressure relief inside the housing 10.

[0109] With the above structure, the second through hole 232 can be sealed and opened smoothly, so as to achieve smooth pressure relief of the battery device 100.

[0110] In some embodiments, the balance valve 20 further includes a second limiting member 25 and an elastic member 26 both disposed in the second receiving cavity 233. The second limiting member 25 is sleeved on the end of the guide rod portion 215 away from the piston portion 214, and the elastic member 26 is sleeved on the outer periphery of the guide rod portion 215 and abuts against the second limiting member 25 and the second valve body 23 along the gas flow direction. The elastic member 26 is used to provide the elastic restoring force for the first valve body 21 to return from the open position to the sealed position.

[0111] The second limiting member 25 and the elastic member 26 cooperate with each other to achieve smooth switching of the first valve body 21 between the open position and the sealed position.

[0112] Specifically, the second limiting member 25 is sleeved on the end of the guide rod portion 215 opposite to the piston portion 214, that is, the second limiting member 25 is sleeved on the bottom end of the guide rod portion 215 near the inside of the housing 10. The elastic member 26 may be, but is not limited to, a spring, which is sleeved on the outer periphery of the guide rod portion 215, with the top end of the spring abutting upward against the second valve body 23 and the bottom end of the spring abutting downward against the second limiting member 25.

[0113] Initially, the spring is in a stretched state, meaning it has accumulated a certain amount of elastic potential energy. When a single battery cell experiences thermal runaway, the gas pressure inside the housing 10 pushes upwards through the second through-hole 232 against the piston 214. Under the impact of the gas, the piston 214 overcomes the elastic potential energy of the spring and moves upwards, creating a gap between the first seal 216 and the piston 214 or the second valve body 23. This gap allows the second through-hole 232 to connect the inside of the housing 10 with the external environment, enabling rapid depressurization of the battery device 100.

[0114] After the pressure relief is completed, the gas impact force inside the housing 10 disappears, and the piston 214 moves downward under the elastic restoring force of the spring, so that the first seal 216 re-seals the second gap 234 between the piston 214 and the second valve body 23.

[0115] By setting the second limiting member 25 and the elastic member 26, the first valve body 21 can be smoothly switched between the open position and the sealed position, so as to realize the smooth depressurization of the battery device 100.

[0116] It should be noted that in the current structure of the balance valve 20, the piston and guide rod are typically made of metal, and the piston and guide rod are detachably connected via threaded connections or other methods. During assembly, the piston is assembled into the vent hole from top to bottom, and the guide rod is assembled into the vent hole from bottom to top, and then the piston and guide rod are connected by bolts. This results in a large number of parts in the balance valve 20, making assembly complex, and also increasing its weight.

[0117] The balance valve 20 provided in this application has a first valve body 21 made of plastic, that is, the piston part 214 and the guide rod part 215 are integrally molded by injection molding, which not only reduces the weight of the balance valve 20, but also reduces the number of parts, making assembly simpler.

[0118] Based on this, since the first valve body 21 is designed as a one-piece structure, during assembly, the first valve body 21 can only be assembled from top to bottom into the second receiving cavity 233 of the second valve body 23. Thus, when the spring is sleeved on the outer periphery of the guide rod portion 215, the bottom end of the spring has no contact point.

[0119] Based on this, by detachably installing the second limiting member 25 to the bottom end of the guide rod portion 215, a contact position can be provided for the spring, thereby enabling the first valve body 21 to smoothly switch between the open position and the sealed position via the spring.

[0120] Please refer to the following: Figure 3 , Figure 7 as well as Figure 8 In some embodiments, the second limiting member 25 includes a base plate 251 and a side plate 252 surrounding the outer periphery of the base plate 251. The base plate 251 has a third through hole 253 that communicates with the first through hole 231 and the balance channel 211 respectively. The elastic member 26 abuts between the side plate 252 and the second valve body 23.

[0121] Specifically, the second limiting member 25 includes a base plate 251 and a side plate 252. The side plate 252 surrounds the outer periphery of the base plate 251, that is, the second limiting member 25 is configured as a sleeve shape with one end open. The second limiting member 25 is fixedly sleeved on the bottom end of the guide rod portion 215, and the inner wall of the second receiving cavity 233 of the second valve body 23 protrudes inward to form a protrusion, so that the top end of the spring can abut against the protrusion of the second valve body 23, and the bottom end of the spring can abut against the second limiting member 25.

[0122] A third through hole 253 is provided on the base plate 251, which is connected to the balance channel 211 and the first through hole 231. In this way, the gas inside the box 10 can be discharged from the box 10 in sequence through the first through hole 231, the third through hole 253, the balance channel 211, and the first gap 241. Conversely, the gas in the external environment can enter the box 10 in sequence through the first gap 241, the balance channel 211, the third through hole 253, and the first through hole 231.

[0123] Furthermore, when the second limiting member 25 is fitted onto the bottom end of the guide rod portion 215, the bottom end of the spring abuts against the upper end surface of the side plate 252, and the top end of the spring abuts against the protrusion of the second valve body 23, thereby achieving the limiting of the spring.

[0124] Through the above structure, the second limiting member 25 and the second valve body 23 can cooperate with each other to provide a supporting foundation for the elastic member 26, so that the elastic member 26 can smoothly provide the elastic restoring force of the first valve body 21 from the open position to the sealed position, and realize the smooth depressurization of the battery device 100.

[0125] like Figure 8 and Figure 9 As shown, in some embodiments, a snap-fit ​​member 254 protrudes from the inner wall of the side plate 252, and a slot 217 is provided on the outer periphery of the guide rod portion 215. The snap-fit ​​member 254 and the slot 217 engage with each other to fix the second limiting member 25 to the guide rod portion 215.

[0126] Specifically, a protrusion is provided on the inner wall of the side plate 252, and the protrusion is formed into a snap-fit ​​member 254. At the same time, a slot 217 is provided on the outer peripheral wall of the guide rod portion 215, and the snap-fit ​​member 254 can engage with the slot 217 to fix the second limiting member 25 to the guide rod portion 215.

[0127] The second limiting member 25 is sleeved on the bottom end of the guide rod portion 215, and at the same time, the snap-fit ​​member 254 is snapped into the slot 217, so that the second limiting member 25 and the guide rod portion 215 are snapped together.

[0128] The snap-fit ​​connector 254 and the slot 217, which engage with each other, enable a quick connection and fixation between the second limiting member 25 and the guide rod 215.

[0129] In some embodiments, the slot 217 includes a first slot 218 and a second slot 219. The first slot 218 extends axially along the guide rod portion 215, and one end of the first slot 218 is formed as a slot into which the snap-fit ​​member 254 can be inserted. The other end of the first slot 218 communicates with the second slot 219, and the second slot 219 extends circumferentially along the guide rod portion 215.

[0130] Specifically, the first groove 218 and the second groove 219 are connected end to end and together form a figure-7 structure. That is, the first groove 218 extends axially along the guide rod portion 215, and the bottom end of the first groove 218 extends to the bottom end of the guide tube portion to form a slot. The snap-fit ​​member 254 can be inserted into the first groove 218 through the slot. The top end of the first groove 218 communicates with the second groove 219, and the second groove 219 extends circumferentially along the guide rod portion 215. That is, the second groove 219 and the first groove 218 are perpendicular to each other.

[0131] When the snap-fit ​​254 engages with the slot 217, the snap-fit ​​254 is first inserted into the slot from bottom to top, and then moves upward along the first slot 218. When it moves to the bottom of the first slot 218, the second limiting member 25 is rotated at a certain angle along the circumference of the guide rod 215, so that the snap-fit ​​254 moves along the second slot 219.

[0132] Furthermore, the end of the second groove 219 facing away from the first groove 218 can be extended downward to form a groove. When the snap fastener 254 moves to the end of the second groove 219, the snap fastener 254 can be snapped downward into the groove of the second groove 219 under the elastic force of the spring, so that the snap fastener 254 can be snapped more stably into the slot 217.

[0133] With the above structure, the second limiting member 25 is sleeved on the bottom end of the guide rod portion 215, and by rotating the second limiting member 25, the snap-fit ​​member 254 is more stably engaged in the slot 217, thereby improving the connection stability between the second limiting member 25 and the guide rod portion 215.

[0134] In addition, a cross groove can be made on the bottom surface of the base plate 251 so that the second limiting member 25 can be rotated better by the tooling and the cross groove, thereby improving assembly efficiency.

[0135] Please refer to it again. Figure 3 and Figure 4 In some embodiments, the balancing valve 20 further includes a second seal 27, which is sealed between the second valve body 23 and the housing 10.

[0136] Specifically, the second sealing element 27 may be, but is not limited to, a second sealing ring, which is sealed between the second valve body 23 and the housing 10 so that the second valve body 23 can be sealed in the vent hole, thereby achieving air pressure balance inside and outside the housing 10 and depressurization inside the housing 10 through the balance valve 20.

[0137] Therefore, by providing the second sealing element 27, the sealing performance of the second valve body 23 on the housing 10 can be improved.

[0138] In some embodiments, the balancing valve 20 further includes a moisture barrier component 28 disposed in the balancing channel 211. The moisture barrier component 28 allows gas to pass through and is used to block impurities such as liquids.

[0139] Specifically, the moisture-blocking assembly 28 may include an inner spring, an outer spring, a limiting bolt, and a washer. The washer has a central insertion hole, into which the limiting bolt is inserted. The inner spring is sleeved around the outer periphery of the limiting bolt, with its opposite ends abutting against the washer and the limiting bolt, respectively. The outer spring is sleeved around the outer periphery of the inner spring, with its opposite ends abutting against the washer and the second limiting member 25, respectively.

[0140] During use, when the internal air pressure of the housing 10 is greater than the external air pressure, the gas inside the housing 10 enters the balance channel 211 through the first through hole 231 and the third through hole 253, and impacts the limiting bolt upwards, creating a gap between the limiting bolt and the gasket. The gas is discharged through this gap, and after the gas is discharged, the limiting bolt returns to its original position under the elastic force of the inner spring. When the internal air pressure of the housing 10 is less than the external air pressure, the external gas enters the balance channel 211 and impacts the gasket downwards, causing the gasket to move downwards, thus creating a gap between the gasket and the limiting bolt. The gas enters the housing 10 through this gap, and when the internal and external air pressures of the housing 10 return to balance, the gasket returns to its original position under the elastic force of the outer spring.

[0141] It should be noted that the moisture barrier component 28 can be implemented using existing structures, which will not be elaborated here.

[0142] By setting the moisture barrier component 28, the liquid or other impurities in the external environment can be blocked while maintaining the internal environment of the chamber 10, based on achieving gas balance inside and outside the chamber 10.

[0143] Based on the same concept as the battery device 100 described above, this application also provides an electrical device including the battery device 100 as described above.

[0144] According to one or more embodiments, when this application is used, the balance valve 20 is first sealed in the vent hole on the housing 10, and a second sealing element 27 is provided between the balance valve 20 and the housing 10 to improve the sealing between the housing 10 and the balance valve 20.

[0145] When the battery device 100 is in normal use, the first valve body 21 is in a sealed position. At this time, a second gap 234 is formed between the second valve body 23 and the piston part 214, and the second through hole 232 is isolated from the external environment by the first seal 216 in the second gap 234.

[0146] When the air pressure inside the housing 10 is greater than the air pressure of the external environment, the gas inside the housing 10 enters the balance channel 211 through the first through hole 231 and the third through hole 253, and then enters the first gap 241 through the waterproof and breathable component 22, and is discharged to the external environment from the first gap 241.

[0147] When the air pressure inside the housing 10 is lower than the air pressure in the external environment, the gas in the external environment enters the first gap 241, and then enters the balance channel 211 through the waterproof and breathable component 22. It then sequentially enters the housing 10 through the balance channel 211, the third through hole 253, and the first channel. This maintains a pressure balance between the inside and outside of the housing 10.

[0148] When a single battery cell inside the housing 10 experiences thermal runaway, the internal pressure of the housing 10 rises sharply. At this time, a large impact force impacts the piston portion 214 upward through the second through hole 232, causing the piston portion 214 to move upward. A gap is created between the first seal 216 and the piston portion 214, or between the first seal 216 and the second valve body 23. The gas inside the housing 10 can be quickly discharged through the second through hole 232 and the gap, achieving rapid depressurization of the battery device 100.

[0149] When the pressure relief is completed, the impact force inside the housing 10 disappears, and the piston 214 moves downward under the elastic restoring force of the elastic member 26, so that the first seal 216 re-seals the second gap 234, and the second through hole 232 is isolated from the external environment.

[0150] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0151] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: The enclosure has ventilation holes. and A balance valve is sealed inside the vent hole to balance the air pressure inside and outside the box; the balance valve includes a first valve body and a waterproof and breathable component, the first valve body has a balance channel for gas flow, and the waterproof and breathable component is disposed inside the balance channel. The first valve body includes a main body and a pressing part that are connected to each other, and the waterproof and breathable component is pressed and fixed between the main body and the pressing part along the gas flow direction.

2. The battery device according to claim 1, characterized in that, The main body and the pressing part are integrally formed.

3. The battery device according to claim 1, characterized in that, The main body includes a piston part and a guide rod part, the piston part and the guide rod part are integrally formed, and the balance channel is formed inside the guide rod part.

4. The battery device according to any one of claims 1-3, characterized in that, Both the main body and the pressing part are made of plastic.

5. The battery device according to claim 1, characterized in that, The balance valve further includes a second valve body and a cover, wherein the second valve body is sealed within the vent hole, and the first valve body is disposed between the second valve body and the cover. The second valve body has a first through hole that connects the inside of the housing to the balance channel. The cover and the first valve body form a first gap that communicates with the external environment. The first gap, the balance channel and the first through hole are interconnected and form a breathable passage.

6. The battery device according to claim 5, characterized in that, The cover has a first limiting member protruding from one side surface facing the first valve body, and the first limiting member is used to abut against the pressing part.

7. The battery device according to claim 5, characterized in that, The cover is constructed of plastic, and the interior of the cover has a first receiving cavity for accommodating a metal insert.

8. The battery device according to claim 5, characterized in that, The second valve body is also provided with a second through hole that communicates with the inside of the housing. The first valve body is movably disposed relative to the second valve body and has an open position that connects the second through hole with the external environment and a sealed position that seals the second through hole.

9. The battery device according to claim 8, characterized in that, The main body includes a piston part and a guide rod part connected to each other. The interior of the second valve body has a second receiving cavity for accommodating the guide rod part. The second receiving cavity is in communication with the first through hole. The piston portion is located between the second valve body and the cover body, and forms a second gap with the second valve body that communicates with the second through hole; The balancing valve also includes a first seal disposed in the second gap.

10. The battery device according to claim 9, characterized in that, The balance valve further includes a second limiting member and an elastic member, both disposed within the second accommodating cavity. The second limiting member is sleeved on the end of the guide rod portion away from the piston portion. The elastic member is sleeved on the outer periphery of the guide rod portion and abuts against the second limiting member and the second valve body along the gas flow direction. The elastic member is used to provide elastic restoring force for the first valve body to return from the open position to the sealed position.

11. The battery device according to claim 10, characterized in that, The second limiting member includes a base plate and a side plate surrounding the outer periphery of the base plate. A third through hole is provided on the base plate, which communicates with the first through hole and the balance channel respectively. The elastic element abuts between the side plate and the second valve body.

12. The battery device according to claim 11, characterized in that, A snap-fit ​​element protrudes from the inner wall of the side plate, and a slot is formed on the outer periphery of the guide rod. The snap-fit ​​element engages with the slot to fix the second limiting element to the guide rod.

13. The battery device according to claim 12, characterized in that, The slot includes a first slot and a second slot. The first slot extends axially along the guide rod portion, and one end of the first slot is formed as a slot into which the snap-fit ​​member can be inserted. The other end of the first slot is connected to the second slot, and the second slot extends circumferentially along the guide rod portion.

14. The battery device according to claim 5, characterized in that, The balancing valve also includes a second sealing element, which is sealed between the second valve body and the housing.

15. The battery device according to claim 1, characterized in that, The balancing valve also includes a moisture-blocking component disposed within the balancing channel. The moisture-blocking component allows gas to pass through and is used to block impurities other than gas.

16. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-15.

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