Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer, a box body and a protection part, the box body comprises a containing space and a wall plate, the battery monomer is contained in the containing space, the wall plate is arranged on one side of the containing space, and the battery monomer is borne on the wall plate. The protection part is connected to the wall plate and is configured to be capable of expanding when the acting force borne by the wall plate reaches a preset threshold value. According to the invention, the reliability of the battery device can be effectively improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In the development of battery technology, the reliability of battery devices will directly affect the reliability, cost of use and user experience of terminal products. Therefore, how to effectively improve the reliability of battery devices is a technical issue that needs to be continuously improved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can effectively improve the reliability of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, the battery device includes a battery cell, a box body and a protective component, the box body includes a housing space and a wall plate, the battery cell is accommodated in the housing space, the wall plate is arranged on one side of the housing space, and the battery cell is supported by the wall plate. The protective component is connected to the wall plate, and the protective component is configured to expand when the force acting on the wall plate reaches a preset threshold.

[0006] In the above technical solution, when the wall panel is subjected to external impact force, since the protective component is connected to the wall panel, the external impact force can be transmitted to the protective component through the wall panel. When the force applied to the wall panel reaches a preset threshold, the protective component can automatically trigger the protection mechanism to expand to absorb the external impact force, play a buffering role, and reduce the external impact force transmitted to the inside of the box, thereby reducing the risk of damage to the battery cells and other related components located inside the box, and effectively improving the reliability of the battery device.

[0007] In addition, the protection component of the embodiment of the present application is an active protection mechanism, that is, the protection component will expand only when the external impact force on the protection component reaches a preset threshold. When the external impact force on the protection component is lower than the preset threshold, the protection component can have a smaller volume and occupy less space, which helps to improve the energy density of the battery device. Moreover, the protection component of the above technical solution can focus on protecting the wall panels used to carry battery cells, further improving the reliability of the battery device.

[0008] In some embodiments of the first aspect, the protection component includes a bladder and a fluid generator, the fluid generator is connected to the bladder, and the fluid generator is configured to deliver fluid to the bladder when the force applied to the wall panel reaches a preset threshold.

[0009] The expansion of the protection component of the above technical solution is relatively simple and has high reliability, which helps to improve the economic benefits of the battery device.

[0010] In some embodiments of the first aspect, the protection component also includes a sensor and a controller, the sensor is connected to the wall panel, and the controller is connected to the sensor and the fluid generator. The sensor is used to detect the force applied to the wall panel and generate a trigger signal when the force applied to the wall panel reaches a preset threshold. The controller responds to the trigger signal and controls the fluid generator to deliver fluid to the sac.

[0011] The above technical solution introduces sensors to detect the stress of the wall in real time, and quickly outputs a trigger signal when the force on the wall reaches a preset threshold. The controller can complete signal processing and trigger the expansion of the bladder to absorb impact energy in a very short time, which can effectively improve the response speed of the protection component. In addition, the protection component adopts a modular design, and the configuration of the sensor, controller, bladder and fluid generator can be adjusted according to the needs of different battery devices to adapt to a variety of complex environments, such as high vibration, high impact or extreme temperature scenarios.

[0012] In some embodiments of the first aspect, the battery device further includes a heat exchange component connected to a side of the wall plate facing the battery cell, and a projection of the protective component along the thickness direction of the wall plate at least partially overlaps with a projection of the heat exchange component along the thickness direction.

[0013] The protective component of the above technical solution can focus on protecting the heat exchange component, reducing the risk of the heat exchange component being damaged by external impact force.

[0014] In some embodiments of the first aspect, there are multiple protective components, and the multiple protective components are arranged at intervals along a direction perpendicular to the thickness direction.

[0015] The multiple protection components of the above technical solution can fully cover different areas inside the battery device, especially provide targeted protection for multiple key components. In addition, the number and layout of the protection components can be adjusted according to specific needs to adapt to battery devices of different structural types, effectively improving the design flexibility of the protection components.

[0016] In some embodiments of the first aspect, the plurality of protection components include a first protection component and a second protection component, the first protection component forms a first projection along the thickness direction, the heat exchange component forms a second projection along the thickness direction, and the second protection component forms a third projection along the thickness direction. The first projection is arranged along the periphery of the second projection and the third projection, and the third projection at least partially overlaps with the second projection.

[0017] The number and arrangement positions of the first protection component and the second protection component can be flexibly adjusted according to specific needs, so as to adapt to battery devices of different structural types, thereby effectively improving the design flexibility of the protection component.

[0018] In some embodiments of the first aspect, the wall panel includes a first plate body and a second plate body, the first plate body is connected to the second plate body, and in the thickness direction of the wall panel, the second plate body is arranged on the side of the first plate body facing away from the accommodating space, and the protective component is arranged between the first plate body and the second plate body.

[0019] The above technical solution can independently manufacture the first plate body and the second plate body, and then connect the first plate body and the second plate body to form a wall panel. On the one hand, it is easy to prepare, which can reduce the difficulty of preparing the wall panel and help reduce the cost of the wall panel; on the other hand, it can reduce the difficulty of assembling the protective components.

[0020] In some embodiments of the first aspect, the protection component is connected to the first plate body and the second plate body.

[0021] The above technical solution can not only improve the connection firmness of the protection component, but also improve the response sensitivity of the protection component.

[0022] In some embodiments of the first aspect, the protective component has a dimension h1 along the thickness direction, the first plate body and the second plate body have a spacing d1 along the thickness direction, and the dimension h1 and the spacing d1 satisfy the relationship: 1 / 4≤h1 / d1≤3 / 4.

[0023] The above technical solution can make the protection component have a more reasonable response sensitivity and reduce the risk of accidentally triggering expansion by setting the ratio h1 / d1 of the size h1 and the spacing d1 within the above range.

[0024] In some embodiments of the first aspect, the size h1 and the distance d1 satisfy the relationship: 1 / 2≤h1 / d1≤2 / 3. The response sensitivity of the protection component can be further optimized.

[0025] In some embodiments of the first aspect, a first recess is provided on a side of the first plate body facing the second plate body, and at least a portion of the protective component is accommodated in the first recess; and / or a second recess is provided on a side of the second plate body facing the first plate body, and at least a portion of the protective component is accommodated in the second recess.

[0026] The above technical solution can reduce the occupation of the internal space of the box by the protective component, improve the space utilization rate of the battery device, and help to improve the energy density of the battery device.

[0027] In some embodiments of the first aspect, the battery device further includes a frame, which is arranged around the accommodating space and connected to the wall plate, and a projection of the protection component along the thickness direction of the wall plate is spaced apart from a projection of the frame along the thickness direction.

[0028] The above technical solution can reduce the impact of the protective component on the assembly between the frame and the wall plate, or reduce the impact of the frame on the assembly of the protective component, thereby reducing the difficulty of assembling the battery device, helping to improve assembly efficiency and reduce costs.

[0029] In a second aspect, the present application provides an electrical device, comprising a battery device provided by any embodiment of the first aspect, and the battery device is used to store or provide electrical energy.

[0030] 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

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0032] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of a partial top view of a battery device provided in some embodiments of the present application;

[0035] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA;

[0036] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at H;

[0037] Figure 6 A partial top view schematic diagram of another battery device provided in some embodiments of the present application.

[0038] The reference numerals in the specific implementation manner are as follows:

[0039] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor;

[0040] 10. Battery cells;

[0041] 20. Box body; 21. Accommodating space; 22. Wall plate; 221. First plate body; 222. Second plate body; 23. Frame;

[0042] 30. Protective component; 30a. First protective component; 30b. Second protective component;

[0043] 40. Heat exchange components;

[0044] Z, thickness direction. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0047] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0051] The term “plurality” used in this application refers to two or more (including two).

[0052] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0053] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0054] The battery device mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0055] In some embodiments, the battery device may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0056] In some embodiments, the battery device may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0057] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0058] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0059] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0060] In the development of battery technology, the reliability of battery devices will directly affect the reliability, usage cost and user experience of the end products.

[0061] When the battery device is in use, the wall panels of the battery device box are easily impacted by the external environment. When the impact energy is too large, the wall panels will be deformed, which may easily cause damage to the battery cells and other related components inside the box, seriously affecting the reliability of the battery device.

[0062] Based on the above considerations, an embodiment of the present application provides a battery device, which includes a battery cell, a box body and a protective component, wherein the box body includes a housing space and a wall plate, wherein the battery cell is accommodated in the housing space, and the wall plate is disposed on one side of the housing space. The protective component is connected to the wall plate, and the protective component is configured to expand when the force acting on the wall plate reaches a preset threshold.

[0063] In the above technical solution, when the wall panel is subjected to external impact force, since the protective component is connected to the wall panel, the external impact force can be transmitted to the protective component through the wall panel. When the force applied to the wall panel reaches a preset threshold, the protective component can automatically trigger the protection mechanism to expand to absorb the external impact force, play a buffering role, and reduce the external impact force transmitted to the inside of the box, thereby reducing the risk of damage to the battery cells and other related components located inside the box, and effectively improving the reliability of the battery device.

[0064] In addition, the protection component of the embodiment of the present application is an active protection mechanism, that is, the protection component will expand only when the external impact force on the protection component reaches a preset threshold. When the external impact force on the protection component is lower than the preset threshold, the protection component can have a smaller volume and occupy less space, which helps to improve the energy density of the battery device.

[0065] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using the battery devices.

[0066] Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include aircraft, 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. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0067] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including battery boxes and electrical devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0068] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0069] Continue to refer Figure 1 The vehicle 1 is provided with a battery device 2 inside, and the battery device 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery device 2 can be used for powering the vehicle 1, for example, the battery device 2 can be used as an operating power source for the vehicle 1.

[0070] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during starting, navigation and driving.

[0071] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0072] Figure 2 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application, Figure 3 A partial top view of a battery device provided in some embodiments of the present application is shown in FIG. Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA, Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at H.

[0073] Continue to refer Figures 2 to 5The embodiment of the present application provides a battery device, which includes a battery cell 10, a box body 20 and a protective component 30. The box body 20 includes a receiving space 21 and a wall plate 22. The battery cell 10 is received in the receiving space 21, and the wall plate 22 is disposed on one side of the receiving space 21. The protective component 30 is connected to the wall plate 22, and the protective component 30 is configured to expand when the force acting on the wall plate 22 reaches a preset threshold.

[0074] As an example, the box 20 can be a variety of structures, such as a cylinder, a cuboid, etc. The battery cell 10 can be one or more. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 10 are both connected in series and in parallel. Multiple battery cells 10 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 10 is accommodated in the box 20; of course, multiple battery cells 10 can also be connected in series, in parallel, or in mixed connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 20.

[0075] In some examples, there are multiple battery cells 10 , and the multiple battery cells 10 are first connected in series, in parallel, or in hybrid connection to form a battery module. The multiple battery modules are then connected in series, in parallel, or in hybrid connection to form a whole, and are accommodated in the box 20 .

[0076] The multiple battery cells 10 in the battery module can be electrically connected through a busbar component to achieve parallel connection, series connection or mixed connection of the multiple battery cells 10 in the battery module.

[0077] As an example, the wall panel 22 may be a circumferential side panel of the box body 20 , or may be a top panel or a bottom panel of the box body 20 .

[0078] The wall panel 22 can be but is not limited to being made of metal or non-metallic materials. For example, the metal material can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metallic material can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0079] The protective component 30 can be detachably connected to the wall panel 22, or can be integrally provided on the wall panel 22. The protective component 30 can be directly connected to the wall panel 22, or can be restricted to the wall panel 22 by other components. As an example, the connection method between the protective component 30 and the wall panel 22 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0080] In some examples, the protection component 30 is connected to a side of the wall plate 22 facing the battery cell 10 , that is, the protection component 30 is located inside the box body 20 .

[0081] In some examples, the protection component 30 is connected to a side of the wall plate 22 facing away from the battery cell 10 , that is, the protection component 30 is located outside the box body 20 .

[0082] In some examples, a receiving cavity is opened inside the wall panel 22 , and the protection component 30 is disposed in the receiving cavity and connected to the inner wall surface of the wall panel 22 .

[0083] When the wall panel 22 is subjected to an external impact force, since the protective component 30 is connected to the wall panel 22, the external impact force can be transmitted to the protective component 30 through the wall panel 22. When the force applied to the wall panel 22 reaches a preset threshold, the protective component 30 can expand rapidly to absorb the external impact force, play a buffering role, and reduce the external impact force transmitted to the inside of the box body 20.

[0084] It should be noted that the preset threshold value may be a force value interval or a force value, which may be selected according to the actual application environment.

[0085] As an example, the preset threshold may be 2000N-4000N. When the force applied to the protection component 30 is in the range of 2000N-4000N or higher than the range of 2000N-4000N, the protection component 30 can expand rapidly.

[0086] As an example, the preset threshold may be 3000 N. When the force applied to the protective component 30 reaches or exceeds 3000 N, the protective component 30 may expand rapidly.

[0087] The protection component 30 may achieve rapid expansion by changing its own material properties.

[0088] In some examples, the protective component 30 may be made of a polymer composite material containing a microcapsule foaming agent, wherein microcapsules or hollow microspheres are pre-dispersed in a polymer matrix, and these microspheres contain gas or a chemical foaming agent. When the material is subjected to an impact force greater than a preset threshold, the microcapsules are instantly crushed or ruptured, and the internal gas or foaming agent is released, so that the material expands rapidly and forms a foam structure.

[0089] In some examples, the protective component 30 may also be made of a force-sensitive polymer material, in which force-sensitive chemical groups are embedded, and when the stress or strain applied by the outside exceeds a certain critical value, these chemical bonds will break and trigger subsequent chemical reactions. For example, gas byproducts are generated under mechanical action, thereby causing local expansion.

[0090] In some examples, the protective component 30 may also be made of a self-excited gas-releasing material, which, when subjected to a strong impact, triggers the release of compressed gas stored inside or initiates a rapid chemical reaction to cause itself to expand rapidly.

[0091] In the above technical solution, when the wall plate 22 is subjected to external impact force, since the protection component 30 is connected to the wall plate 22, the external impact force can be transmitted to the protection component 30 through the wall plate 22. When the force applied to the wall plate 22 reaches a preset threshold, the protection component can automatically trigger the protection mechanism to expand to absorb the external impact force, play a buffering role, and reduce the transmission of the external impact force to the inside of the box body 20, thereby reducing the risk of damage to the battery cell 10 and other related components located inside the box body 20, and effectively improving the reliability of the battery device.

[0092] In addition, the protection component 30 of the embodiment of the present application is an active protection mechanism, that is, the protection component 30 will expand only when the external impact force on the protection component 30 reaches a preset threshold. When the external impact force on the protection component 30 is lower than the preset threshold, the protection component 30 can have a smaller volume and occupy less space, which helps to improve the energy density of the battery device.

[0093] In some embodiments, the protection component 30 includes a bladder and a fluid generator, wherein the fluid generator is connected to the bladder and configured to deliver fluid to the bladder when the force applied to the wall panel 22 reaches a preset threshold.

[0094] For example, the bladder itself can be deformed, and the bladder can be a flexible body or an elastic body. The fluid generator is responsible for delivering fluid into the bladder when the force applied to the wall panel reaches a preset threshold, so that the bladder expands rapidly, thereby absorbing the impact energy.

[0095] The capsule is initially compressed or folded to save space. After expansion, it can be formed into a cylindrical, spherical or other geometric shape. The specific shape is optimized according to the design requirements of the battery device to ensure that it can fully cover the area that needs to be protected.

[0096] Optionally, the bladder may be made of a high-strength and flexible material, such as thermoplastic polyurethane, silicone rubber, or a reinforced fiber composite material, to ensure sufficient strength and durability during the expansion process while having tear resistance.

[0097] Optionally, the fluid may be a liquid or a gas, etc., wherein the liquid may be but is not limited to water, foam or silicone oil, etc.; the gas may be but is not limited to air, nitrogen or hydrogen, etc.

[0098] The expansion of the protection component 30 of the above technical solution is relatively simple and has high reliability, which helps to improve the economic benefits of the battery device.

[0099] In some embodiments, the protection component 30 further includes a sensor and a controller, the sensor is connected to the wall plate 22, the controller is connected to the sensor and the fluid generator, the sensor is used to detect the force applied to the wall plate 22, and generates a trigger signal when the force applied to the wall plate 22 reaches a preset threshold, and the controller responds to the trigger signal and controls the fluid generator to deliver fluid to the sac. The protection component 30 includes a sensor, a controller and an expansion member, the sensor is connected to the wall plate 22, the controller is connected to the sensor and the expansion member, the sensor is used to detect the force applied to the wall plate 22, and generates a trigger signal when the force applied to the wall plate 22 reaches a preset threshold, and the controller responds to the trigger signal and controls the expansion member to expand.

[0100] For example, the sensor is a key component in the protection component 30 for monitoring the stress of the wall panel 22. Its function is to collect the stress information of the wall panel 22 in real time and output a trigger signal when a preset threshold is reached. The controller is the core logic unit of the protection component 30, which is responsible for receiving the trigger signal of the sensor and controlling the start of the fluid generator.

[0101] The sensor can be detachably connected to the wall plate 22, or can be integrally arranged on the wall plate 22. The sensor can be directly connected to the wall plate 22, or can be restricted to the wall plate 22 by other components. As an example, the connection method between the sensor and the wall plate 22 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0102] In some examples, the sensor is connected to a side of the wall plate 22 facing the battery cell 10 , that is, the sensor is located inside the box 20 .

[0103] In some examples, the sensor is connected to a side of the wall plate 22 facing away from the battery cell 10 , that is, the sensor is located outside the box 20 .

[0104] In some examples, a receiving cavity is opened inside the wall panel 22 , and the sensor is disposed in the receiving cavity and connected to the inner wall surface of the wall panel 22 .

[0105] The above technical solution introduces sensors to detect the stress conditions of the wall in real time, and quickly outputs a trigger signal when the force acting on the wall panel 22 reaches a preset threshold. The controller can complete signal processing in a very short time and trigger the bladder to expand to absorb impact energy, which can effectively improve the response speed of the protective component 30.

[0106] In addition, the protection component 30 adopts a modular design, and the configuration of the sensor, controller, bladder and fluid generator can be adjusted according to the needs of different battery devices to adapt to a variety of complex environments, such as high vibration, high impact or extreme temperature scenarios.

[0107] In some embodiments, the protective component 30 includes a sensor, a controller and an expansion piece. The sensor is connected to the wall panel 22, and the controller is connected to the sensor and the expansion piece. The sensor is used to detect the force applied to the wall panel 22 and generate a trigger signal when the force applied to the wall panel 22 reaches a preset threshold. The controller responds to the trigger signal and controls the expansion of the expansion piece.

[0108] For example, the expansion member may be made of an electroexpandable material, which refers to a material that can expand itself under the action of an external electric field, such as a dielectric elastomer, an ionic electroactive polymer, or a composite material of electrostrictive ceramic and electroelastic polymer, etc. After responding to the trigger signal, the controller can apply a voltage to the expansion member to cause the expansion member to expand rapidly.

[0109] The expansion member may also be made of a heat-sensitive expansion material, which refers to a material that can expand when heated to a certain temperature, such as heat-expandable microspheres or foaming polymers, etc. After the controller responds to the trigger signal, it can heat the expansion body to make it expand rapidly.

[0110] In some embodiments, the sensor, controller, and flow generator are all disposed within the bladder.

[0111] In some embodiments, the battery device also includes a heat exchange component 40, which is connected to the side of the wall plate 22 facing the battery cell 10, and the projection of the protection component 30 along the thickness direction Z of the wall plate 22 at least partially overlaps with the projection of the heat exchange component 40 along the thickness direction Z.

[0112] For example, the heat exchange component 40 can be heat-conductively connected (e.g., attached) to at least a portion of the battery cell 10, and the heat exchange medium flows in the heat exchange component 40 and exchanges heat with the battery cell 10 through the side wall of the heat exchange component 40. When the temperature of the battery cell 10 is too high, the heat exchange component 40 can cool the battery cell 10; when the temperature of the battery cell 10 is too low, the heat exchange component 40 can keep the battery cell 10 warm to increase the service life of the battery.

[0113] As an example, a channel is provided inside the heat exchange component 40, and the channel is used to accommodate the heat exchange medium. The side wall of the heat exchange component 40 refers to the part surrounding the channel.

[0114] The channel inside the heat exchange component 40 may extend along a straight line or a curve, which can be selected according to the actual application environment.

[0115] Optionally, the heat exchange medium may be a liquid or a gas, etc., wherein the liquid may be but is not limited to water, hot oil, ethylene glycol, alcohol, etc.; the gas may be but is not limited to air, nitrogen, or hydrogen, etc.

[0116] The heat exchange component 40 can be detachably connected to the wall plate 22, or can be integrally provided on the wall plate 22. The heat exchange component 40 can be directly connected to the wall plate 22, or can be restricted to the wall plate 22 by other components. As an example, the connection method between the heat exchange component 40 and the wall plate 22 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0117] The projection of the protection component 30 along the thickness direction Z of the wall plate 22 may partially overlap with the projection of the heat exchange component 40 along the thickness direction Z, or may overlap with the projection of the heat exchange component 40 along the thickness direction Z.

[0118] It is understandable that the heat exchange component 40 contains a heat exchange medium. If the heat exchange component 40 is cracked due to external impact, the heat exchange medium will spray out and damage the battery cells 10, electrical connectors or other related components inside the battery device. In severe cases, it may cause major safety hazards.

[0119] In this way, the protective component 30 of the above technical solution can focus on protecting the heat exchange component 40, reducing the risk of the heat exchange component 40 being damaged by external impact force.

[0120] Figure 6 A partial top view schematic diagram of another battery device provided in some embodiments of the present application.

[0121] Continue to refer Figure 6 In some embodiments, the number of the protective components 30 is multiple, and the multiple protective components 30 are arranged at intervals along a direction perpendicular to the thickness direction Z. The multiple refers to two or more, such as three, four, five or more.

[0122] The multiple protection components 30 of the above technical solution can fully cover different areas inside the battery device, especially provide targeted protection for multiple key components. In addition, the number and arrangement positions of the protection components 30 can be adjusted according to specific needs, so as to adapt to battery devices of different structural types, effectively improving the design flexibility of the protection components 30.

[0123] In some embodiments, the plurality of protective components 30 include a first protective component 30a and a second protective component 30b, the first protective component 30a forms a first projection along the thickness direction Z, the heat exchange component 40 forms a second projection along the thickness direction Z, and the second protective component 30b forms a third projection along the thickness direction Z. The first projection is arranged along the periphery of the second projection and the third projection, and the third projection at least partially overlaps with the second projection.

[0124] The first protection component 30a can provide protection for the peripheral area of ​​the heat exchange component 40, and the second protection component 30b can provide protection for the main area where the heat exchange component 40 is located, so that the heat exchange component 40 can be more comprehensively protected, which can further improve the reliability of the battery device.

[0125] In some embodiments, there are multiple first protective components 30a, and there are multiple second protective components 30b. The multiple first protective components 30a form multiple first projections along the thickness direction Z, and the multiple second protective components 30b form multiple third projections along the thickness direction Z. The multiple first projections are arranged at intervals along the periphery of the second projections and the multiple second projections, and the multiple second projections are distributed in an array along a direction perpendicular to the thickness direction Z.

[0126] The number and arrangement positions of the first protection component 30 a and the second protection component 30 b can be flexibly adjusted according to specific needs, so as to adapt to battery devices of different structural types, thereby effectively improving the design flexibility of the protection component 30 .

[0127] In some embodiments, the wall panel 22 includes a first plate body 221 and a second plate body 222, the first plate body 221 is connected to the second plate body 222, and in the thickness direction Z of the wall panel 22, the second plate body 222 is arranged on the side of the first plate body 221 facing away from the accommodating space 21, and the protective component 30 is arranged between the first plate body 221 and the second plate body 222.

[0128] The first plate 221 may be detachably connected to the second plate, or may be integrally provided on the second plate 222. The first plate 221 may be directly connected to the second plate 222, or may be restricted to the second plate 222 by other components. As an example, the connection method between the first plate 221 and the second plate 222 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0129] In some examples, the first plate body 221 and the second plate body 222 are made of the same material, which can simplify the manufacturing process and reduce costs.

[0130] In some examples, the protection component 30 may be connected to the first plate 221. Specifically, in the thickness direction Z, there is a gap between the protection component 30 and the second plate 222.

[0131] In some examples, the protection component 30 may be connected to the second plate 222. Specifically, in the thickness direction Z, there is a gap between the protection component 30 and the first plate 221.

[0132] In some examples, the protection component 30 may be connected to both the first plate 221 and the second plate 222. Specifically, the protection component 30 has two opposite surfaces along the thickness direction Z that are respectively connected to the first plate 221 and the second plate 222.

[0133] Exemplarily, the protective component 30 may be first connected to the first plate 221 and / or the second plate 222, and then the first plate 221 and the second plate 222 may be connected to form the wall panel 22; or the first plate 221 and the second plate 222 may be first connected to form the wall panel 22, and then the protective component 30 may be connected to the first plate 221 and / or the second plate 222.

[0134] The above technical solution can independently manufacture the first plate body 221 and the second plate body 222, and then connect the first plate body 221 and the second plate body 222 to form the wall panel 22. On the one hand, it is easy to prepare and can reduce the difficulty of preparing the wall panel 22, which helps to reduce the cost of the wall panel 22; on the other hand, it can reduce the difficulty of assembling the protective component 30.

[0135] In some embodiments, the first plate body 221 and the second plate body 222 are sealed and connected, which can reduce the impact of external moisture or impurities on the protective component 30.

[0136] For example, the sealed connection between the first plate body 221 and the second plate body 222 may be achieved by, but is not limited to, laser welding, adhesive sealing, or bolt fastening combined with a sealing gasket.

[0137] In some embodiments, the protection component 30 is connected to the first plate 221 and the second plate 222 .

[0138] Exemplarily, two opposite side surfaces of the protection component 30 along the thickness direction Z are respectively bonded and connected to the first plate body 221 and the second plate body 222 .

[0139] Since the second plate body 222 is arranged on the side of the first plate body 221 facing away from the accommodating space 21, when the wall panel 22 is subjected to external impact, the second plate body 222 will be deformed first. At the same time, the distance between the second plate body 222 and the first plate body 221 will be reduced, and the protective component 30 will be subjected to a part of the impact force transmitted by the second plate body 222 and the extrusion force between the first plate body 221 and the second plate body 222.

[0140] Since the protection component 30 is connected between the first plate 221 and the second plate 222 , the protection component 30 can be subjected to the squeezing force between the first plate 221 and the second plate 222 when the second plate 222 begins to deform, thereby improving the response sensitivity of the protection component 30 .

[0141] In some examples, the protection component 30 is bonded to the first plate 221 and the second plate 222 .

[0142] The above technical solution can not only improve the connection firmness of the protection component 30 , but also improve the response sensitivity of the protection component 30 .

[0143] In some embodiments, the protection component 30 has a dimension h1 along the thickness direction Z, the first plate 221 and the second plate 222 have a spacing d1 along the thickness direction Z, and the dimension h1 and the spacing d1 satisfy the relationship: 1 / 4≤h1 / d1≤3 / 4.

[0144] Exemplarily, the dimension h1 of the protective component 30 along the thickness direction Z may be understood as the thickness of the protective component 30 .

[0145] As an example, the ratio h1 / d1 of the size h1 and the distance d1 may be, but is not limited to, 1 / 4, 3 / 8, 1 / 2, 5 / 8, 3 / 4, etc.

[0146] It is understandable that the ratio h1 / d1 of the dimension h1 and the spacing d1 can affect the response sensitivity of the protection component 30. The smaller the ratio h1 / d1 of the dimension h1 and the spacing d1, the smaller the extrusion force applied by the first plate 221 and the second plate 222 to the protection component 30 when the external impact force is the same; the larger the ratio h1 / d1 of the dimension h1 and the spacing d1, the greater the extrusion force applied by the first plate 221 and the second plate 222 to the protection component 30 when the external impact force is the same.

[0147] The above technical solution can make the protection component 30 have a more reasonable response sensitivity and reduce the risk of accidentally triggering expansion by setting the ratio h1 / d1 of the size h1 and the spacing d1 within the above range.

[0148] Exemplarily, the dimension h1 of the protective component 30 along the thickness direction Z can be measured by contact mechanical measurement. As an example, the protective component 30 is placed flat and its thickness is directly measured with a precision caliper or micrometer. As another example, the protective component 30 is directly measured with a thickness gauge, and then the thickness value is read. The spacing d1 between the first plate body 221 and the second plate body 222 along the thickness direction Z can also be measured by contact mechanical measurement. The specific example is referred to above and will not be repeated here.

[0149] In some embodiments, the size h1 and the distance d1 satisfy the relationship: 1 / 2≤h1 / d1≤2 / 3. The response sensitivity of the protection component 30 can be further optimized.

[0150] As an example, the ratio h1 / d1 of the size h1 and the distance d1 may be, but is not limited to, 1 / 2, 7 / 12, 2 / 3, etc.

[0151] In some embodiments, a first recess is disposed on one side of the first plate body 221 facing the second plate body 222 , and at least a portion of the protection component 30 is accommodated in the first recess.

[0152] The protection member 30 may be partially or entirely accommodated in the first recess.

[0153] The above technical solution can reduce the occupation of the internal space of the box body 20 by the protective component 30, improve the space utilization rate of the battery device, and help to improve the energy density of the battery device.

[0154] In some embodiments, the first plate body 221 is further provided with a first convex portion corresponding to the first concave portion, and the first convex portion protrudes from a surface of the first plate body 221 facing away from the second plate body 222 .

[0155] Exemplarily, a recessed area may be formed locally in the first plate body 221 through a stamping process, and the recessed area may be embodied as a first concave portion on the side of the first plate body 221 along the thickness direction Z facing the second plate body 222, and the recessed area may be embodied as a first convex portion on the side of the first plate body 221 along the thickness direction Z facing away from the second plate body 222.

[0156] The above technical solution can not only simplify the preparation process of the first concave portion, but also further improve the structural strength of the first plate body 221 through the cooperation between the first concave portion and the first convex portion.

[0157] In some embodiments, a second recess is disposed on one side of the second plate body 222 facing the first plate body 221 , and at least a portion of the protection component 30 is accommodated in the second recess.

[0158] The protection member 30 may be partially or entirely accommodated in the second recess.

[0159] The above technical solution can reduce the occupation of the internal space of the box body 20 by the protective component 30, improve the space utilization rate of the battery device, and help to improve the energy density of the battery device.

[0160] In some embodiments, the second plate body 222 is further provided with a second convex portion corresponding to the second concave portion, and the second convex portion protrudes from a surface of the second plate body 222 facing away from the first plate body 221 .

[0161] Exemplarily, a recessed area may be formed locally in the second plate body 222 through a stamping process, and the recessed area may be embodied as a second concave portion on the side of the second plate body 222 along the thickness direction Z facing the first plate body 221, and the recessed area may be embodied as a second convex portion on the side of the second plate body 222 along the thickness direction Z facing away from the first plate body 221.

[0162] The above technical solution can not only simplify the preparation process of the two concave parts, but also further improve the structural strength of the first plate body 221 through the cooperation between the second concave part and the second convex part.

[0163] In some embodiments, the projection of the first recess along the thickness direction Z overlaps with the projection of the second recess along the thickness direction Z, which can reduce the difficulty of assembling the protection component 30 .

[0164] In some embodiments, the battery cells 10 are supported on the wall plate 22. Exemplarily, the wall plate 22 may also be referred to as the bottom plate of the box body 20.

[0165] The battery cell 10 is supported on the wall plate 22 , which means that the wall plate 22 is used to provide a supporting force for the battery cell 10 , wherein the supporting force provided by the wall plate 22 for the battery cell 10 is opposite to the gravity exerted on the battery cell 10 .

[0166] It is understandable that the bottom of the box 20 of the battery device has a greater risk of being impacted by the external environment, and the battery cells 10 are supported on the wall plate 22, so that the impact resistance of the wall plate 22 is required to be relatively high.

[0167] In this way, the protection component 30 of the above technical solution can focus on protecting the wall plate 22 used to support the battery cell 10, further improving the reliability of the battery device.

[0168] In some embodiments, the battery device further includes a frame 23 , which is disposed around the accommodating space 21 and connected to the wall plate 22 , and a projection of the protection component 30 along the thickness direction Z of the wall plate 22 is spaced apart from a projection of the frame 23 along the thickness direction Z.

[0169] Exemplarily, the frame 23 may be a rectangular parallelepiped frame, a cylindrical frame, or other irregular frames, etc. Accordingly, the shape of the accommodating space 21 matches the shape of the frame 23. If the frame 23 is a rectangular parallelepiped frame, the accommodating space 21 is a rectangular parallelepiped, and if the frame 23 is a cylindrical frame, the accommodating space 21 is a cylinder.

[0170] Optionally, the frame 23 can be but is not limited to being made of metal or non-metallic materials. For example, the metal material can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metallic material can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0171] The frame 23 can be detachably connected to the wall panel 22, or can be integrally provided on the wall panel 22. The frame 23 can be directly connected to the wall panel 22, or can be restricted to the wall panel 22 by other components. As an example, the connection method between the frame 23 and the wall panel 22 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0172] The projection of the protection component 30 along the thickness direction Z of the wall panel 22 is spaced from the projection of the frame 23 along the thickness direction Z. It can be understood that the projection of the protection component 30 along the thickness direction Z of the wall panel 22 does not overlap with the projection of the frame 23 along the thickness direction Z. In other words, the protection component 30 is arranged to avoid the connection area between the frame 23 and the wall panel 22.

[0173] For example, the protective component 30 may be connected to the wall panel 22 first, and then the frame 23 may be connected and fixed to the wall panel 22 ; or the frame 23 may be connected and fixed to the wall panel 22 first, and then the protective component 30 may be connected to the wall panel 22 .

[0174] The above technical solution can reduce the impact of the protective component 30 on the assembly between the frame 23 and the wall panel 22, or reduce the impact of the frame 23 on the assembly of the protective component 30, thereby reducing the difficulty of assembling the battery device, helping to improve assembly efficiency and reduce costs.

[0175] According to some embodiments of the present application, the present application also provides an electrical device, including a battery device according to any of the above schemes, and the battery device is used to store or provide electrical energy.

[0176] If not otherwise specified, all implementations and optional implementations of the present application can be combined with each other to form a new technical solution. All technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0177] In order to better understand the battery device provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery device in practical application is provided here for illustration.

[0178] The embodiment of the present application provides a battery device, which includes a battery cell 10, a box body 20, a plurality of protective components 30 and a heat exchange component 40. The box body 20 includes a receiving space 21 and a wall plate 22. The battery cell 10 is carried by the wall plate 22 and received in the receiving space 21. The wall plate 22 is arranged at one side of the receiving space 21. The wall plate 22 includes a first plate body 221 and a second plate body 222. The first plate body 221 is connected to the second plate body 222. In the thickness direction Z of the wall plate 22, the second plate body 222 is arranged at a side of the first plate body 221 that is away from the receiving space 21. The plurality of protective components 30 are arranged at intervals along a direction perpendicular to the thickness direction Z.

[0179] The protection component 30 is connected between the first plate body 221 and the second plate body 222. The protection component 30 includes a sensor, a controller and an expansion member. The sensor is connected to the wall panel 22, and the controller is connected to the sensor and the expansion member. The sensor is used to detect the force applied to the wall panel 22 and generate a trigger signal when the force applied to the wall panel 22 reaches a preset threshold. The controller responds to the trigger signal and controls the expansion of the expansion member.

[0180] The heat exchange component 40 is connected to the side of the wall plate 22 facing the battery cell 10 , and the projection of the protection component 30 along the thickness direction Z of the wall plate 22 at least partially overlaps with the projection of the heat exchange component 40 along the thickness direction Z.

[0181] In the above technical solution, when the wall plate 22 is subjected to external impact force, since the protection component 30 is connected to the wall plate 22, the external impact force can be transmitted to the protection component 30 through the wall plate 22. When the force applied to the protection component 30 reaches a preset threshold, the protection mechanism can be automatically triggered to expand to absorb the external impact force, play a buffering role, and reduce the transmission of the external impact force to the inside of the box body 20, thereby reducing the risk of damage to the battery cell 10 and other related components located inside the box body 20, and effectively improving the reliability of the battery device.

[0182] In addition, the protection component 30 of the embodiment of the present application is an active protection mechanism, that is, the protection component 30 will expand only when the external impact force on the protection component 30 reaches a preset threshold. When the external impact force on the protection component 30 is lower than the preset threshold, the protection component 30 can have a smaller volume and occupy less space, which helps to improve the energy density of the battery device.

[0183] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0184] 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 device, characterized in that: include: Battery cells; The box body comprises a containing space and a wall plate, wherein the battery monomer is contained in the containing space, the wall plate is arranged at one side of the containing space, and the battery monomer is supported by the wall plate; A protection component connected to the wall panel, wherein the protection component is configured to expand when the force applied to the wall panel reaches a preset threshold; Wherein, the wall panel includes a first plate body and a second plate body, the first plate body is connected to the second plate body, and in the thickness direction of the wall panel, the second plate body is arranged on the side of the first plate body facing away from the accommodating space, and the protective component is arranged between the first plate body and the second plate body.

2. The battery device according to claim 1, characterized in that: The protection component includes a bladder and a fluid generator, wherein the fluid generator is connected to the bladder and is configured to deliver fluid to the bladder when the force applied to the wall panel reaches the preset threshold.

3. The battery device according to claim 2, characterized in that: The protection component also includes a sensor and a controller, the sensor is connected to the wall panel, and the controller is connected to the sensor and the fluid generator. The sensor is used to detect the force applied to the wall panel and generate a trigger signal when the force applied to the wall panel reaches the preset threshold. The controller responds to the trigger signal and controls the fluid generator to deliver fluid to the sac.

4. The battery device according to claim 1, characterized in that: The battery device further includes a heat exchange component connected to a side of the wall plate facing the battery cell, and a projection of the protection component along the thickness direction of the wall plate at least partially overlaps with a projection of the heat exchange component along the thickness direction.

5. The battery device according to claim 4, characterized in that: There are multiple protective components, and the multiple protective components are arranged at intervals along a direction perpendicular to the thickness direction.

6. The battery device according to claim 5, characterized in that: The plurality of protection components include a first protection component and a second protection component, the first protection component forms a first projection along the thickness direction, the heat exchange component forms a second projection along the thickness direction, and the second protection component forms a third projection along the thickness direction; The first projection is arranged along a periphery of the second projection and a third projection, and the third projection at least partially overlaps with the second projection.

7. The battery device according to claim 1, characterized in that: The protection component is connected to the first plate body and the second plate body.

8. The battery device according to claim 1, characterized in that: The protection component has a dimension h1 along the thickness direction, and the first plate body and the second plate body have a spacing d1 along the thickness direction. The dimension h1 and the spacing d1 satisfy the relationship: 1 / 4≤h1 / d1≤3 / 4.

9. The battery device according to claim 8, characterized in that: The size h1 and the distance d1 satisfy the relationship: 1 / 2≤h1 / d1≤2 / 3.

10. The battery device according to claim 1, characterized in that: A first recess is provided on one side of the first plate body facing the second plate body, and at least a part of the protection component is accommodated in the first recess; and / or, A second recess is disposed on one side of the second plate body facing the first plate body, and at least a portion of the protection component is accommodated in the second recess.

11. The battery device according to claim 1, characterized in that: The battery device further comprises a frame, which is arranged around the accommodating space and connected to the wall plate, and the projection of the protection component along the thickness direction of the wall plate is arranged at an interval from the projection of the frame along the thickness direction.

12. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 11, wherein the battery device is used to store or provide electrical energy.

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