Battery and electric device
By setting the valve body and the bladder in the battery, balancing the pressure inside and outside the box, the problem of the battery's reliability decrease under the action of internal and external pressure difference is solved, and higher battery reliability is achieved.
Patent Information
- Application Number
- CN202420118641.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-17
AI Technical Summary
Existing batteries are prone to deformation or cracking under the action of internal and external pressure difference, resulting in a decrease in reliability.
By setting the valve body and the bladder in the battery, the valve body is used to balance the pressure inside and outside the box, and the bladder is elastically deformed when the internal and external pressure difference changes, and gas exchange is realized to balance the pressure.
It reduces the risk of damage caused by the internal and external pressure difference of the battery box, reduces the possibility of water vapor intrusion, and improves the reliability of the battery.
Smart Images
Figure CN222483610U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art
[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.
[0003] In the development of battery technology, how to improve battery reliability has always been a research direction in battery technology. Utility Model Content
[0004] In view of the above problems, the present application provides a battery and an electrical device, which can improve the reliability of the battery.
[0005] On the one hand, an embodiment of the present application provides a battery. The battery includes a box, a capsule, and a valve body. The capsule is contained in the box, and the capsule is configured to elastically deform when the pressure difference between the inside and outside of the capsule changes. The valve body is disposed in the box and connected to the capsule, and the valve body is used to balance the internal air pressure of the capsule and the external air pressure of the box.
[0006] In the above scheme, the valve body is provided to balance the pressure inside and outside the box, reducing the risk of deformation or even cracking of the box under the pressure difference between the inside and outside. By providing the capsule, the gas inside the capsule and the gas outside the box can be exchanged to achieve the balance of the pressure inside and outside the box, thereby reducing the possibility of water vapor outside the box invading other components inside the box, reducing the possibility of failure or even short circuit of other components, and improving the reliability of the battery.
[0007] In some embodiments, the valve body is configured such that when the internal air pressure of the sac is greater than the external air pressure of the box and the pressure difference is greater than a first threshold pressure, the valve body opens to discharge the gas in the sac; and when the internal air pressure of the sac is less than the external air pressure of the box and the pressure difference is greater than a second threshold pressure, the valve body opens to replenish the gas in the sac.
[0008] In the above scheme, by setting the first threshold air pressure and the second threshold air pressure, when the pressure difference between the inside and outside of the sac fluctuates within a certain range, the valve body does not need to be opened to discharge and replenish gas, thereby reducing the accuracy requirements for the valve body and reducing the manufacturing cost of the valve body.
[0009] In some embodiments, the first threshold air pressure is less than the second threshold air pressure.
[0010] In the above solution, since the box can withstand a predetermined range of pressure, when the valve body is not opened and the pressure outside the box is greater than the pressure inside the box, the box can withstand a portion of the pressure from outside the box, thereby reducing the air intake accuracy requirements for the valve body. Setting the first threshold pressure lower than the second threshold pressure is conducive to reducing the risk of components in the box being squeezed and deformed due to excessive pressure inside the box, while reducing the difficulty of manufacturing the valve body.
[0011] In some embodiments, the valve body includes a first chamber, a second chamber, and a valve core located in the first chamber and the second chamber, and the valve core is used to connect or isolate the first chamber and the second chamber. The capsule includes a storage space, and the storage space is connected to the second chamber.
[0012] In the above scheme, the above arrangement is helpful to increase the gas exchange efficiency between the outside of the box and the inside of the bladder, improve the rate of balancing the pressure inside and outside the box, and reduce the possibility of damage to the box.
[0013] In some embodiments, the capsule includes a main body portion and a connecting portion connected to each other, the main body portion is provided with a storage space, the connecting portion is connected to a wall portion forming the second chamber, and the wall portion passes through the connecting portion.
[0014] In the above scheme, by passing the wall portion through the connecting portion, the connection method between the sac body and the valve body is simplified, the sealing performance between the sac body and the valve body is improved, and the possibility of a gap appearing at the connection between the sac body and the valve body when the sac body is elastically deformed is reduced.
[0015] In some embodiments, the connecting portion includes a first sub-connecting portion and a second sub-connecting portion connected to each other, the second sub-connecting portion is movably arranged relative to the first sub-connecting portion along the axial direction of the second chamber, the second sub-connecting portion is connected to the wall portion through the first sub-connecting portion, and the second sub-connecting portion is connected to the main body portion.
[0016] In the above scheme, by providing a movable first sub-connection part and a second sub-connection part, it is helpful to increase or decrease the storage capacity of the storage space, reduce the space occupied by the capsule in the box, and increase the air pressure threshold that the capsule can balance.
[0017] In some embodiments, the valve core includes a first valve core and a second valve core. The first valve core is configured to discharge the gas in the sac when the valve body is opened, and the second valve core is configured to replenish the gas in the sac when the valve body is opened. The wall portion is provided with a through hole extending along the axial direction of the second chamber, and at least a portion of the second sub-connecting portion is connected to one of the first valve core and the second valve core through the through hole.
[0018] In the above scheme, by connecting the second sub-connection part and the valve core, the movement of the second sub-connection part can follow the movement of the valve core, which is beneficial to reduce the difficulty of moving the second sub-connection part, improve the movement accuracy of the second sub-connection part, and further improve the control accuracy of the stored air pressure in the sac.
[0019] In some embodiments, the valve body further includes a breathable member disposed in the first chamber.
[0020] In the above scheme, it is helpful to reduce the possibility of foreign matter such as dust outside the box entering the bladder through the valve body, reduce the risk of failure caused by blockage of the valve body and the bladder body, and improve the reliability of the battery.
[0021] In some embodiments, the battery further includes a battery cell, the battery cell is accommodated in the box, at least a portion of the capsule is located between the battery cell and the inner wall of the box, and / or at least a portion of the capsule is located between two adjacent battery cells.
[0022] In the above scheme, the above arrangement is helpful to improve the space utilization rate in the battery box, reduce the overall volume of the box, and improve the energy density of the battery.
[0023] In some embodiments, the housing further comprises a receiving member located in the housing, the receiving member having a receiving channel, at least a portion of the capsule is located in the receiving channel, the capsule points in the direction of the valve body, and the receiving channel is tapered.
[0024] In the above scheme, by placing the balloon in the accommodating channel, the shape of the balloon after elastic deformation is smaller in volume close to the valve body and larger in volume away from the valve body, which can accelerate the gas exchange rate outside the box and inside the balloon, increase the contact area between the balloon and the air pressure outside the balloon, and improve the control accuracy of the pressure difference between the inside and outside of the balloon.
[0025] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery in any of the aforementioned embodiments, and the battery is used to provide electrical energy.
[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;
[0029] Figure 2 is a schematic diagram of the structure of a battery provided in an embodiment of the present application;
[0030] Figure 3 is a schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application;
[0031] Figure 4 is a structural schematic diagram of a battery module provided in an embodiment of the present application;
[0032] Figure 5 yes Figure 3 A schematic diagram of an enlarged structure of P;
[0033] Figure 6 yes Figure 3 Another enlarged structural diagram of P in the middle;
[0034] Figure 7 yes Figure 3 Another enlarged structural diagram of P in the middle;
[0035] Figure 8 It is a schematic diagram of the cross-sectional structure of another battery provided in an embodiment of the present application.
[0036] In the attached figure:
[0037] 1000. Vehicles;
[0038] 100, battery; 200, controller; 300, motor; 400, battery module;
[0039] 10. Box body; 11. First box body portion; 12. Second box body portion; 13. Accommodation portion; 14. Accommodation member; 141. Accommodation channel;
[0040] 20. capsule; 21. main body; 22. connection part; 221. first sub-connection part; 222. second sub-connection part;
[0041] 30. valve body; 31. first chamber; 32. second chamber; 321. wall; 33. valve core; 331. first valve core; 332. second valve core;
[0042] 40, breathable part; 50, battery cell; S1, storage space; H1, through hole; H2, slide groove; X, axial direction. DETAILED DESCRIPTION
[0043] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0048] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).
[0049] In the description of the embodiments of the present application, the technical 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.
[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0051] With the development of battery technology, batteries are used as power devices in many fields. The environment in which batteries are used in different fields will cause a large difference between the working environment pressure of the battery and the internal pressure of the battery, causing the battery case to rupture and then lead to battery failure.
[0052] During the research process, the inventors found that in order to balance the pressure difference inside and outside the battery, the battery usually uses a normally open valve as an exhaust channel to solve the above problem. However, the normally open valve cannot prevent the exchange of gas inside the battery and gas outside the battery. Water vapor can invade the battery and cause the risk of failure of internal battery parts or even short circuit, which in turn leads to a decrease in the reliability of the battery.
[0053] Based on the above technical problems, the present application provides a technical solution, which balances the pressure inside and outside the box by setting a valve body, reducing the risk of deformation or even cracking of the box under the action of the internal and external pressure difference. By setting a bladder, the gas inside the bladder and the gas outside the box can be exchanged to achieve the balance of the pressure inside and outside the box, thereby reducing the possibility of water vapor outside the box invading other components inside the box, reducing the possibility of failure or even short circuit of other components, and improving the reliability of the battery.
[0054] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc., wherein spacecrafts include airplanes, rockets, space shuttles and spacecrafts, etc., electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.
[0055] The battery cells described in the embodiments of the present application are not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as examples.
[0056] See also Figure 1 , Figure 1 A simple schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 may be provided inside the vehicle 1000, and specifically, for example, the battery 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used, for example, to control the battery to power the motor 300. The battery may be used for starting and navigating the vehicle 1000, and of course, the battery 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.
[0057] Figure 2 Schematic diagram of a battery structure provided in an embodiment of the present application. Figure 2 As shown, the battery 100 includes a housing 10 and a battery cell (not shown in the figure), and the battery cell is accommodated in the housing 10 .
[0058] The box 10 is used to accommodate battery cells, and the box 10 can be a variety of structures. In some embodiments, the box 10 may include a first box portion 11 and a second box portion 12, the first box portion 11 and the second box portion 12 cover each other, and the first box portion 11 and the second box portion 12 jointly define a receiving portion 13 for accommodating battery cells. The second box portion 12 may be a hollow structure with one end open, the first box portion 11 is a plate-like structure, and the first box portion 11 covers the open side of the second box portion 12 to form a box with a receiving portion 13; the first box portion 11 and the second box portion 12 may also be a hollow structure with one side open, and the open side of the first box portion 11 covers the open side of the second box portion 12 to form a box 10 with a receiving portion 13. Of course, the first box portion 11 and the second box portion 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.
[0059] In the battery 100, there can be one or more battery cells. If there are more than one battery cell, the battery cells can be connected in series, in parallel or in a mixed connection. A mixed connection means that the battery cells are connected in series and in parallel. The battery cells can be directly connected in series, in parallel or in a mixed connection, and then the whole formed by the battery cells can be accommodated in the box 10; of course, the battery module 400 can also be formed by connecting the battery cells in series, in parallel or in a mixed connection, and then the battery modules 400 can be connected in series, in parallel or in a mixed connection to form a whole, and then accommodated in the box 10.
[0060] Figure 3 is a schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application. In some embodiments, Figure 3 As shown, there are multiple battery cells 50, and the multiple battery cells 50 are first connected in series, in parallel, or in mixed series to form a battery module 400. The multiple battery modules 400 are then connected in series, in parallel, or in mixed series to form a whole, and are accommodated in a box.
[0061] Figure 4 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.
[0062] See also Figures 2 to 4 The embodiment of the present application provides a battery 100. The battery 100 includes a case 10, a capsule 20, and a valve body 30. The capsule 20 is accommodated in the case 10, and the capsule 20 is configured to elastically deform when the pressure difference between the inside and outside of the capsule 20 changes. The valve body 30 is disposed in the case 10 and connected to the capsule 20, and the valve body 30 is used to balance the internal air pressure of the capsule 20 and the external air pressure of the case 10.
[0063] Optionally, the housing 10 may have a housing 13, and the capsule 20 and other components may be arranged in the housing 13. The external air pressure of the capsule 20 is the air pressure between the outer surface of the capsule 20 and the inner wall of the housing 10, and the internal air pressure of the capsule 20 is the air pressure in the internal space of the capsule 20. The capsule 20 may produce elastic deformation under the action of the external air pressure of the capsule 20, so that the overall volume of the capsule 20 increases or decreases, thereby changing the internal air pressure of the capsule 20. Optionally, the initial pressure difference between the inside and outside of the capsule 20 may be zero or close to zero. Optionally, the increase in the external air pressure of the capsule 20 may be caused by the increase in the volume of other components in the housing 10.
[0064] Optionally, in the initial state, the internal gas of the capsule 20 may be the same as the external gas of the capsule 20 .
[0065] The valve body 30 is disposed on the box body 10. Optionally, the box body 10 may include a first box body portion 11 and a second box body portion 12. The valve body 30 may be disposed at the junction of the first box body portion 11 and the second box body portion 12. Of course, the valve body 30 may also be disposed only on one of the first box body portion 11 and the second box body portion 12. Optionally, the valve body 30 may include a two-way valve exhaust valve.
[0066] When the valve body 30 is not opened, the internal air pressure of the bladder 20 is negatively correlated with the volume of the bladder 20. For example, as the volume of the bladder 20 decreases, the pressure inside the bladder 20 increases. Conversely, when the valve body 30 is not opened, the volume of the bladder 20 increases, and the pressure inside the bladder 20 decreases.
[0067] When the difference between the external air pressure of the capsule 20 and the internal air pressure of the capsule 20 changes and the external air pressure of the capsule 20 is greater than the internal air pressure of the capsule 20, the capsule 20 will produce elastic deformation under the action of the external air pressure of the capsule 20, so that the overall volume of the capsule 20 is reduced. Subsequently, the external air pressure of the capsule 20 decreases and the internal air pressure of the capsule 20 increases, resulting in an air pressure difference between the external air pressure of the box 10 and the internal air pressure of the capsule 20, thereby opening the valve body 30, so that the gas in the capsule 20 can be discharged to the outside of the box 10 through the valve body 30, thereby reducing the air pressure of the capsule 20, and the pressure difference between the inside and outside of the capsule 20 is restored to the initial state, thereby reducing the risk of the box 10 cracking due to excessive pressure in the box 10.
[0068] When the difference between the external air pressure of the sac 20 and the internal air pressure of the sac 20 changes and the external air pressure of the sac 20 is lower than the internal air pressure of the sac 20, the sac 20 will produce elastic deformation under the action of the internal air pressure of the sac 20, so that the overall volume of the sac 20 increases. Subsequently, the external air pressure of the sac 20 increases and the internal air pressure of the sac 20 decreases, resulting in an air pressure difference between the external air pressure of the box 10 and the internal air pressure of the sac 20, thereby opening the valve body 30, so that the gas outside the box 10 can be replenished into the sac 20 through the valve body 30, thereby increasing the air pressure of the sac 20, and the pressure difference between the inside and outside of the sac 20 returns to the initial state, thereby reducing the risk of the box 10 being dented or even the components inside the box 10 being squeezed due to excessive pressure difference between the inside and outside of the box 10.
[0069] It is understandable that the receiving portion 13 in the box 10 is a closed space. When the gas in the capsule 20 is exchanged with the gas outside the box 10, water vapor can only enter the capsule 20 through the valve body 30, and the space outside the capsule 20 is still in a dry state.
[0070] Optionally, the material of the capsule includes one or more combinations of polyester fiber, nylon, rubber, and plastic. Of course, the material of the capsule can also include other elastically deformable materials.
[0071] In the battery 100 provided in the embodiment of the present application, the valve body 30 is provided to balance the pressure inside and outside the box 10, thereby reducing the risk of deformation or even cracking of the box 10 under the action of the internal and external pressure difference. By providing the capsule 20, the gas inside the capsule 20 and the gas outside the box 10 can be exchanged to achieve the balance of the pressure inside and outside the box 10, thereby reducing the possibility of water vapor outside the box 10 invading other components inside the box 10, reducing the possibility of failure or even short circuit of other components, and improving the reliability of the battery 100.
[0072] In some optional embodiments, the valve body 30 is configured such that when the internal air pressure of the sac is greater than the external air pressure of the box and the pressure difference is greater than a first threshold pressure, the valve body 30 opens to discharge the gas in the sac 20; and when the internal air pressure of the sac is less than the external air pressure of the box and the pressure difference is greater than a second threshold pressure, the valve body 30 opens to replenish the gas in the sac 20.
[0073] The internal air pressure of the capsule is greater than the external air pressure of the box, that is, the external air pressure of the capsule 20 increases, which makes the volume of the capsule 20 smaller and the internal air pressure of the capsule 20 increases, resulting in the internal air pressure of the capsule being greater than the external air pressure of the box.
[0074] The internal air pressure of the capsule is lower than the external air pressure of the box, that is, the external air pressure of the capsule 20 decreases, so that the volume of the capsule 20 increases, and the internal air pressure of the capsule 20 decreases, resulting in the internal air pressure of the capsule being lower than the external air pressure of the box. It is understandable that when the gas in the capsule 20 is discharged to the outside of the box 10, the internal air pressure of the capsule 20 will decrease, so that the pressure difference between the inside and outside of the capsule 20 can be restored to the initial pressure difference. When the gas in the capsule 20 is replenished, the volume of the capsule 20 increases, the internal air pressure of the capsule 20 decreases, and the external air pressure of the capsule 20 increases, so that the pressure difference between the inside and outside of the capsule 20 can be restored to the initial pressure difference.
[0075] Optionally, the first threshold air pressure may be equal to the second threshold air pressure.
[0076] In these optional embodiments, by setting the first threshold air pressure and the second threshold air pressure, when the pressure difference between the inside and outside of the sac 20 fluctuates within a certain range, the valve body 30 does not need to be opened to discharge and replenish gas, thereby reducing the accuracy requirements on the valve body 30 and reducing the manufacturing cost of the valve body 30.
[0077] In some optional embodiments, the first threshold air pressure is less than the second threshold air pressure.
[0078] Optionally, the first threshold air pressure may include 0.1 KPa to 1 KPa. Exemplarily, the first threshold air pressure may be 0.1 KPa, 0.2 KPa, 0.3 KPa, 0.5 KPa, 0.8 KPa or 1 KPa.
[0079] Optionally, the second threshold air pressure may include 2 KPa to 5 KPa. Exemplarily, the second threshold air pressure may be 2 KPa, 2.5 KPa, 3 KPa, 3.5 KPa, 4 KPa, 4.5 KPa or 5 KPa.
[0080] In these optional embodiments, since the box body 10 can withstand a predetermined range of pressure, when the valve body 30 is not opened and the pressure outside the box body 10 is greater than the pressure inside the box body 10, the box body 10 can withstand a portion of the pressure from outside the box body 10, thereby reducing the air intake accuracy requirement for the valve body 30. Setting the first threshold air pressure lower than the second threshold air pressure is conducive to reducing the risk of components in the box body 10 being squeezed and deformed under the pressure inside the box body 10 due to excessive pressure inside the box body 10, while reducing the difficulty of manufacturing the valve body 30.
[0081] Figure 5 yes Figure 3 Schematic diagram of an enlarged structure of P.
[0082] In some optional embodiments, see Figure 3 and Figure 5The valve body 30 includes a first chamber 31, a second chamber 32 and a valve core 33 located in the first chamber 31 and the second chamber 32. The valve core 33 is used to connect or isolate the first chamber 31 and the second chamber 32. The capsule 20 includes a storage space S1, which is connected to the second chamber 32.
[0083] Optionally, the valve body 30 may include a channel, an end plate or a step may be provided in the channel, and at least a portion of the valve core 33 matches the end plate or the step, so that the channel is divided into a first chamber 31 and a second chamber 32. A pressure relief hole may be provided on the valve core 33, and the opening and closing of the valve body 30 is controlled by controlling the opening and closing of the pressure relief hole.
[0084] Optionally, under the initial pressure difference, a preset volume of gas may be stored in the storage space S1 of the capsule 20 .
[0085] Optionally, the capsule 20 may be provided with a plurality of storage spaces S1. Under the initial pressure difference state, a portion of the storage spaces S1 in the capsule 20 may store gas, while another portion of the storage spaces S1 may not store gas. The storage space S1 is connected to the second chamber 32. When the valve body 30 is opened, the first chamber 31 is connected to the second chamber 32, and the storage space S1 can exchange gas with the first chamber 31.
[0086] In other examples, a one-way valve may be provided on the capsule 20, the one-way valve connecting the space outside the capsule 20 and the storage space S1, and the one-way valve may be used to allow the gas and liquid in the space outside the capsule 20 to flow into the storage space S1 when the one-way valve is opened. Optionally, the opening threshold of the one-way valve may be the same as the opening threshold of the pressure relief valve in the battery 100. Of course, the pressure relief valve in the battery 100 may also be eliminated and replaced by a one-way valve.
[0087] In these optional embodiments, the above-mentioned configuration is helpful to increase the gas exchange efficiency outside the box 10 and inside the bladder 20, improve the rate of balancing the pressure inside and outside the box 10, and reduce the possibility of damage to the box 10.
[0088] In some optional embodiments, see Figure 3 and Figure 5 The capsule 20 includes a main body portion 21 and a connecting portion 22 connected to each other. The main body portion 21 is provided with a storage space S1. The connecting portion 22 is connected to a wall portion 321 forming the second chamber 32, and the wall portion 321 is penetrated in the connecting portion 22.
[0089] Optionally, the main body 21 and the connecting portion 22 may be an integral structure. Of course, the main body 21 and the connecting portion 22 may also be separate structures.
[0090] Optionally, the shape of the body portion 21 may include a hollow thin-walled structure, and the material of the wall portion 321 may be an elastic material.
[0091] Optionally, the main body 21 and the connecting portion 22 may be fixedly connected by bonding, clamping, bolting, or the like.
[0092] Optionally, the connection part 22 may include a pipe structure, a plate-like structure with through holes, or other structures. As an example, a threaded hole is provided in the connection part 22 , the wall part 321 passes through the threaded hole, and at least part of the connection part 22 is connected to the wall part 321 .
[0093] The wall portion 321 forming the second chamber 32 refers to the structure on the valve body 30 that encloses the second chamber 32. In the embodiment of the present application, the connecting portion 22 is connected to the wall portion 321 forming the second chamber 32. Optionally, the connecting portion 22 can be fixedly connected to the wall portion 321 forming the second chamber 32 by bonding, clamping, bolting, etc. Alternatively, the connecting portion 22 can also be connected to the wall portion 321 forming the first chamber 31. Optionally, the wall portion 321 in the valve body 30 for forming the first chamber 31 can be fixedly connected to the box body 10.
[0094] In these optional embodiments, by passing the wall portion 321 through the connecting portion 22, the connection method between the sac body 20 and the valve body 30 is simplified, the sealing performance between the sac body 20 and the valve body 30 is improved, and the possibility of a gap forming at the connection between the sac body 20 and the valve body 30 when the sac body 20 is elastically deformed is reduced.
[0095] Figure 6 yes Figure 3 Schematic diagram of another enlarged structure of P.
[0096] In some optional embodiments, see Figure 3 and Figure 6 The connecting part 22 includes a first sub-connecting part 221 and a second sub-connecting part 222 connected to each other. The second sub-connecting part 222 is movably arranged along the axial direction of the second chamber 32 relative to the first sub-connecting part 221. The second sub-connecting part 222 is connected to the wall part 321 through the first sub-connecting part 221, and the second sub-connecting part 222 is connected to the main body part 21.
[0097] The axial direction of the second chamber 32 refers to the extension direction of the second chamber 32. The second sub-connection part 222 can move relative to the first sub-connection part 221 along the axial direction X of the second chamber 32. The first sub-connection part 221 and the wall part 321 are fixedly connected. The first sub-connection part 221 is stationary relative to the wall part 321. The second sub-connection part 222 is movable relative to the wall part 321. The second sub-connection part 222 moves relative to the first sub-connection part 221 in a direction away from the first chamber 31, which can increase the storage space S1 of the capsule 20; the second sub-connection part 222 moves relative to the first sub-connection part 221 in a direction close to the first chamber 31, which can reduce the storage space S1 of the capsule 20.
[0098] Optionally, the shape of the first sub-connection part 221 can be a pipe structure with an inner wall of a certain thickness, and a slide groove H2 extending along the axial direction X of the second chamber 32 can be provided on the inner wall, and at least part of the second sub-connection part 222 is located in the slide groove H2, and the second sub-connection part 222 can move in the slide groove H2. Optionally, the slide groove H2 can be formed by a depression on the inner surface of the inner wall. Of course, the slide groove H2 can also be formed by a depression on the side surface of the first sub-connection part 221 away from the first chamber 31 along the axial direction X of the second chamber 32. Of course, in some other examples, the first sub-connection part 221 and the second sub-connection part 222 can also be movably connected in other ways, which can ensure that the connecting area between the first sub-connection part 221 and the second sub-connection part 222 and the storage space S1 is a closed space.
[0099] In some examples, a limiting structure may be provided on the first sub-connecting portion 221 to limit the moving distance of the second sub-connecting portion 222 .
[0100] In these optional embodiments, by providing a movable first sub-connection portion 221 and a second sub-connection portion 222, it is helpful to increase or decrease the storage capacity of the storage space S1, reduce the space occupied by the capsule 20 in the box body 10, and increase the air pressure threshold that the capsule 20 can balance.
[0101] Figure 7 yes Figure 3 Schematic diagram of another enlarged structure of P.
[0102] In some optional embodiments, see Figure 3 and Figure 7The valve core 33 includes a first valve core 331 and a second valve core 332. The first valve core 331 is configured to discharge the gas in the bag 20 when the valve body 30 is opened, and the second valve core 332 is configured to replenish the gas in the bag 20 when the valve body 30 is opened. The wall portion 321 is provided with a through hole H1 extending along the axial direction X of the second chamber 32. At least a portion of the second sub-connection portion 222 is connected to one of the first valve core 331 and the second valve core 332 through the through hole H1.
[0103] Optionally, the first valve core 331 may include a first valve body and a first pressure relief hole, the first valve body is used to open or close the first pressure relief hole, and the first pressure relief hole may be provided on the first valve body. The first valve body may include an elastic member, and the value of the first threshold air pressure may be adjusted by adjusting the elastic modulus of the elastic member.
[0104] Optionally, the second valve core 332 may include a second valve body and a second pressure relief hole, the second valve body is used to open or close the second pressure relief hole, and the second pressure relief hole may be provided on the second valve body or the first valve body. The second valve body may include an elastic member, and the value of the first threshold air pressure may be adjusted by adjusting the elastic modulus of the elastic member.
[0105] Optionally, the number of through holes H1 on the wall portion 321 may include one or more. The second sub-connection portion 222 may include a connection body and an extension portion, one end of the extension portion is connected to the connection body, and the other end of the extension portion passes through the through hole H1 and is connected to one of the first valve core 331 and the second valve core 332.
[0106] Optionally, a groove may be provided on the wall portion 321, the groove is formed by being recessed along the axial direction X of the second chamber 32, and the groove is recessed from the surface of one side of the wall portion 321 facing away from the first chamber 31. The extension portion of the second sub-connection portion 222 may pass through the groove and be connected to one of the first valve core 331 and the second valve core 332.
[0107] Optionally, a protrusion connected to the second sub-connection portion 222 can be provided on the first valve core 331, and the protrusion can protrude from the first valve body in the direction toward the capsule body 20. The setting of the protrusion can reduce the extension length of the through hole H1 along the axial direction X of the second chamber 32 to reduce the size of the valve body 30.
[0108] It should be noted that when the first valve core 331 and the second sub-connection part 222 are connected, when the first valve core 331 is opened, the second sub-connection part 222 follows the first valve body to move in a direction close to the first chamber 31, so that the gas in the capsule 20 is discharged while reducing the space occupied by the capsule 20 in the box body 10; when the second valve core 332 and the second sub-connection part 222 are connected, when the second valve core 332 is opened, the second sub-connection part 222 follows the second valve body to move in a direction away from the first chamber 31, so that the gas in the capsule 20 is replenished while increasing the storage capacity of the capsule 20 that can store gas.
[0109] In these optional embodiments, by connecting the second sub-connection part 222 and the valve core 33, the movement of the second sub-connection part 222 can follow the movement of the valve core 33, which is beneficial to reduce the difficulty of moving the second sub-connection part 222, improve the movement accuracy of the second sub-connection part 222, and further improve the control accuracy of the stored air pressure in the bag body 20.
[0110] In some optional embodiments, see Figure 7 The valve body 30 further includes a breathable member 40 , and the breathable member 40 is disposed in the first chamber 31 .
[0111] Optionally, the air-permeable member 40 may include a semi-permeable membrane.
[0112] In these optional embodiments, by providing a breathable member 40, the possibility of foreign matter such as dust outside the box body 10 entering the capsule body 20 through the valve body 30 is reduced, the risk of failure caused by blockage of the valve body 30 and the capsule body 20 is reduced, and the reliability of the battery 100 is improved.
[0113] In some optional embodiments, see Figure 3 The battery 100 further includes a battery cell 50 , which is contained in the box body 10 , and at least a portion of the capsule 20 is located between the battery cell 50 and the inner wall of the box body 10 , and / or at least a portion of the capsule 20 is located between two adjacent battery cells 50 .
[0114] The number of the battery cells 50 may include one or more, and a plurality of battery cells 50 may be arranged side by side to form a battery module 400. At least a portion of the structure of the capsule 20 may be arranged between the battery cells 50 and the inner wall of the box body 10. At least a portion of the capsule 20 may also be arranged between two adjacent battery modules 400. Of course, a gap may be provided between two adjacent battery cells 50 for arranging the capsule 20.
[0115] In these optional embodiments, the above-mentioned configuration is helpful to improve the space utilization rate in the box 10 of the battery 100, reduce the overall volume of the box 10, and improve the energy density of the battery 100.
[0116] Figure 8 It is a schematic diagram of the cross-sectional structure of another battery provided in an embodiment of the present application.
[0117] In some optional embodiments, see Figure 8 The box body 10 further includes a receiving member 14 located inside the box body 10 . The receiving member 14 has a receiving channel 141 . At least part of the capsule 20 is located inside the receiving channel 141 . The capsule 20 points in the direction of the valve body 30 . The receiving channel 141 is tapered.
[0118] Optionally, the structure in the capsule 20 that can be used for elastic deformation can be located in the accommodating channel 141. Exemplarily, the main body 21 of the capsule 20 is located in the accommodating channel 141.
[0119] Optionally, the accommodating channel 141 may penetrate the accommodating member 14 so that the accommodating member 14 has two opposite openings, and the capsule 20 is placed in the accommodating channel 141 through one of the openings. Optionally, the opening areas of the two openings may be different, and the area of one opening may be larger than the area of the other opening, and the capsule 20 is passed through the accommodating channel 141 through the smaller opening.
[0120] In the direction of the sac 20 pointing to the valve body 30 , the accommodating channel 141 is tapered. In other words, the closer the accommodating channel 141 is to the valve body 30 , the smaller the channel cross-sectional area is, and the farther the accommodating channel 141 is from the valve body 30 , the larger the channel cross-sectional area is.
[0121] In these optional embodiments, by placing the capsule 20 in the accommodating channel 141, the shape of the capsule 20 after elastic deformation is smaller in volume near the valve body 30 and larger in volume away from the valve body 30, thereby accelerating the gas exchange rate outside the box 10 and inside the capsule 20, increasing the contact area between the capsule 20 and the air pressure outside the capsule 20, and improving the control accuracy of the pressure difference between the inside and outside of the capsule 20.
[0122] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery 100 in any of the aforementioned embodiments, and the battery 100 is used to provide electrical energy.
[0123] It should be noted that the electrical device provided in the embodiment of the present application has the beneficial effects of the battery 100 in any of the aforementioned embodiments. For details, please refer to the aforementioned description of the beneficial effects of the battery 100, and the embodiment of the present application will not be repeated here.
[0124] According to some embodiments of the present application, please refer to Figure 3 and Figure 5The battery 100 includes a case 10, a capsule 20, a valve body 30, and a battery cell 50. The capsule 20 is contained in the case 10, and is configured to elastically deform when the pressure difference between the inside and outside of the capsule 20 changes. The valve body 30 is disposed in the case 10 and connected to the capsule 20, and is used to balance the internal air pressure of the capsule 20 and the external air pressure of the case 10.
[0125] The valve body 30 is configured such that when the internal air pressure of the sac 20 is greater than the external air pressure of the box and the pressure difference is greater than a first threshold air pressure, the valve body 30 opens to discharge the gas in the sac 20, and when the internal air pressure of the sac 20 is less than the external air pressure of the box and the pressure difference is greater than a second threshold air pressure, the valve body 30 opens to replenish the gas in the sac 20. The first threshold air pressure is less than the second threshold air pressure.
[0126] The valve body 30 includes a first chamber 31, a second chamber 32 and a valve core 33 located in the first chamber 31 and the second chamber 32. The valve core 33 is used to connect or isolate the first chamber 31 and the second chamber 32. The capsule 20 includes a storage space S1, which is connected to the second chamber 32.
[0127] The capsule 20 includes a main body 21 and a connecting portion 22 connected to each other. The main body 21 is provided with a storage space S1. The connecting portion 22 is connected to a wall portion 321 forming the second chamber 32, and the wall portion 321 is passed through the connecting portion 22. The battery cell 50 is accommodated in the box body 10, and at least part of the capsule 20 is located between the battery cell 50 and the inner wall of the box body 10.
[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
Claims
1. A battery, characterized in that: include: Box; A bladder body is contained in the box body, and the bladder body is configured to elastically deform when the pressure difference between the inside and outside of the bladder body changes; A valve body is arranged on the box body and connected to the sac body, and the valve body is used to balance the internal air pressure of the sac body and the external air pressure of the box body.
2. The battery according to claim 1, characterized in that The valve body is configured such that when the internal air pressure of the sac is greater than the external air pressure of the box and the pressure difference is greater than a first threshold pressure, the valve body opens to discharge the gas in the sac, and when the internal air pressure of the sac is less than the external air pressure of the box and the pressure difference is greater than a second threshold pressure, the valve body opens to replenish the gas in the sac.
3. The battery according to claim 2, characterized in that The first threshold air pressure is lower than the second threshold air pressure.
4. The battery according to claim 1, characterized in that The valve body comprises a first chamber, a second chamber and a valve core located in the first chamber and the second chamber, and the valve core is used to connect or isolate the first chamber and the second chamber; The capsule includes a storage space, and the storage space is communicated with the second chamber.
5. The battery according to claim 4, characterized in that The capsule body comprises a main body portion and a connecting portion which are connected to each other. The storage space is arranged in the main body portion. The connecting portion is connected to a wall portion which forms the second chamber, and the wall portion is penetrated in the connecting portion.
6. The battery according to claim 5, characterized in that The connecting portion includes a first sub-connecting portion and a second sub-connecting portion connected to each other, the second sub-connecting portion is movably arranged relative to the first sub-connecting portion along the axial direction of the second chamber, the second sub-connecting portion is connected to the wall portion through the first sub-connecting portion, and the second sub-connecting portion is connected to the main body portion.
7. The battery according to claim 6, characterized in that The valve core includes a first valve core and a second valve core. The first valve core is configured to discharge the gas in the sac when the valve body is opened, and the second valve core is configured to replenish the gas in the sac when the valve body is opened. The wall portion is provided with a through hole extending along the axial direction of the second chamber, and at least a part of the second sub-connection portion is connected to one of the first valve core and the second valve core through the through hole.
8. The battery according to claim 4, characterized in that The valve body further includes a breathable member, and the breathable member is disposed in the first chamber.
9. The battery according to claim 1, characterized in that Also includes a battery cell, the battery cell is accommodated in the box; At least a portion of the bladder is located between the battery cell and the inner wall of the box body, and / or at least a portion of the bladder is located between two adjacent battery cells.
10. The battery according to claim 9, characterized in that The box body further comprises a receiving member located in the box body, wherein the receiving member has a receiving channel, at least a portion of the sac is located in the receiving channel, the sac points in the direction of the valve body, and the receiving channel is tapered.
11. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 10.