Battery device and electric device
By integrating the confluent with the box body, the gap is eliminated, the energy density and integrity of the battery device are improved, and the problem of space waste in the prior art is solved.
Patent Information
- Application Number
- CN202520155853.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2035-01-23
AI Technical Summary
The existing battery devices have problems with space waste in improving energy density, especially due to the low utilization of the accommodating cavity space due to the gap between the confluent and the box.
By integrating the confluent and the box body to form a first box, the gap between the confluent and the box body is eliminated, and the space utilization of the accommodating cavity is increased, thereby increasing the energy density of the battery device.
A higher energy density of the battery device is achieved, reducing manufacturing cost and weight, while improving the integrity and reliability of the battery device.
Smart Images
Figure CN222914974U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of batteries, and more particularly, to a battery device and an electrical device. Background Art
[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.
[0003] In the development of battery technology, in addition to improving the reliability of the battery device, enhancing the energy density of the battery device is also an issue that needs to be considered.
[0004] Therefore, how to enhance the energy density of the battery device is an urgent problem to be solved in battery technology. Summary of the Utility Model
[0005] In view of the above problems, the embodiments of the present application provide a battery device and an electrical device, which can enhance the energy density of the battery device.
[0006] In a first aspect, the embodiments of the present application provide a battery device, including a first box body, a second box body, and battery cells; the second box body is connected to the first box body, and the second box body and the first box body together enclose a receiving cavity; a plurality of battery cells are arranged in the receiving cavity; wherein, the first box body includes a box body main body and a bus bar, the bus bar is connected to the box body main body, and the bus bar is used to realize the electrical connection of the plurality of battery cells.
[0007] In the above technical solution, the first box body includes a box body main body and a bus bar, and the bus bar is connected to the box body main body, so that the bus bar and the box body main body are integrated to form the first box body. Therefore, compared with the case where the bus bar and the box body main body are separately arranged, on the one hand, the integrity of the battery device is improved, which is convenient for the assembly of the battery device; on the other hand, the gap between the bus bar and the box body main body is eliminated, so that more space in the receiving cavity can be used to accommodate the battery cells, thereby increasing the space utilization rate of the receiving cavity, and thus increasing the energy density of the battery device.
[0008] In some embodiments, the box body main body is a plastic part, and the bus bar is a metal part.
[0009] In the above technical solution, on the one hand, the box body is a plastic part and the bus bar is a metal part. Therefore, compared with the box body, the bus bar has higher structural strength and melting point. When the box body and the bus bar are integrated into the first box, the bus bar can improve the structural strength of some areas of the box body and enhance the high-temperature resistance of some areas of the first box, thereby improving the reliability of the battery device. On the other hand, since the box body is a plastic part, the risk of short circuit between the box body and the bus bar is reduced when they are connected, thus improving the reliability of the battery device. On the further hand, the box body is a plastic part, which has a lower cost and density than metal. Therefore, it can reduce the manufacturing cost and weight of the battery device.
[0010] In some embodiments, the box body is injection-molded on the bus bar; or, the bus bar is bonded to the box body; or, the bus bar is thermally pressed and connected to the box body.
[0011] In the above technical solution, by injection-molding the box body on the bus bar, on the one hand, the bus bar is wrapped by the box body, so that the box body plays a role of bearing, positioning and insulating protection for the bus bar, and effectively reduces the risk of displacement and wear of the bus bar; on the other hand, it can improve the connection firmness and reliability between the box body and the bus bar. At the same time, there is no need to set components for connecting the box body and the bus bar between the box body and the bus bar, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box. By bonding the bus bar to the box body, on the one hand, the box body plays a role of bearing, positioning and insulating protection for the bus bar, and effectively reduces the risk of displacement and wear of the bus bar; on the other hand, using the bonding method to connect the box body and the bus bar can improve the binding force between the box body and the bus bar to enhance the structural strength of the box body, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box. The bus bar is thermally pressed and connected to the box body. On the one hand, through the thermal pressing process, the box body and the bus bar can be combined into one body, and the box body and the bus bar can be closely attached to each other; on the other hand, it can improve the connection firmness and reliability between the box body and the bus bar. At the same time, there is no need to set components for connecting the box body and the bus bar between the box body and the bus bar, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box.
[0012] In some embodiments, the battery cell includes electrode terminals, and the bus bar is welded to the electrode terminals; a through hole is provided on the box body, and the bus bar is disposed at the through hole.
[0013] In the above technical solution, the bus bar is welded to the electrode terminal. A through hole is provided on the box body, and the bus bar is arranged at the through hole, so that it is convenient to weld the bus bar and the electrode terminal by the area where the bus bar is exposed to the outside through the through hole, thereby reducing the welding difficulty between the bus bar and the electrode terminal, which is beneficial to optimizing the production process and production rhythm.
[0014] In some embodiments, the first box body further includes an insulating member, and the insulating member covers the area where the bus bar is exposed to the outside through the through hole.
[0015] In the above technical solution, the area where the bus bar is exposed to the outside through the through hole is covered by the insulating member, thereby reducing the risk of short circuit of the battery device caused by the overlap between the area where the bus bar is exposed to the outside through the through hole and other structural members of the battery device, and reducing the risk of reduction in the reliability of the battery device caused by the corrosion of the area where the bus bar is exposed to the outside through the through hole, thereby improving the reliability of the battery device.
[0016] In some embodiments, the insulating member is a gasket or an adhesive layer.
[0017] In the above technical solution, by setting the insulating member as a gasket, the sealing performance of the area where the bus bar is exposed to the outside through the through hole can be improved by using the gasket, and the sealing structure of the gasket is convenient for later disassembly, repair and replacement; by setting the insulating member as an adhesive layer, the area where the bus bar is exposed to the outside through the through hole can be covered by the processing method of applying glue, simplifying the manufacturing process of the first box body and facilitating the processing of the first box body.
[0018] In some embodiments, at least part of the surface of the box body facing the battery cell is recessed to form a receiving portion, and at least part of the bus bar is received in the receiving portion.
[0019] In the above technical solution, by receiving at least part of the bus bar in the receiving portion, the space occupied by the bus bar in the accommodation cavity is reduced, so that more space in the accommodation cavity can be used to accommodate the battery cells, thereby further increasing the space utilization rate of the accommodation cavity, and further increasing the energy density of the battery device.
[0020] In some embodiments, the first box body further includes a sampling module, the sampling module is used to collect information of the battery cell, and the sampling module is connected to the box body.
[0021] In the above technical solution, the first box body further includes a sampling module. The sampling module is connected to the box body proper, so that the sampling module, the bus bar and the box body proper are integrated to form the first box body. Compared with the case where the sampling module, the bus bar and the box body proper are separately arranged, on the one hand, the integrity of the battery device is improved, which is convenient for the assembly of the battery device; on the other hand, the gap between the sampling module and the box body proper is eliminated, so that more space in the accommodation cavity can be used to accommodate battery cells, thereby further increasing the space utilization rate of the accommodation cavity, and further increasing the energy density of the battery device.
[0022] In some embodiments, the box body proper is injection-molded on the sampling module; or, the sampling module is bonded to the box body proper; or, the sampling module is thermally press-connected to the box body proper.
[0023] In the above technical solution, by injection-molding the box body proper on the sampling module, on the one hand, the sampling module is wrapped by the box body proper, so that the box body proper plays a role in carrying, positioning and insulating protection for the sampling module, and effectively reduces the risk of displacement and wear of the sampling module; on the other hand, the connection firmness and reliability between the box body proper and the sampling module can be improved, and at the same time, there is no need to set a component for connecting the box body proper and the sampling module between the box body proper and the sampling module, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body; by bonding the sampling module to the box body proper, on the one hand, the box body proper plays a role in carrying, positioning and insulating protection for the sampling module, and effectively reduces the risk of displacement and wear of the sampling module; on the other hand, by using the bonding method to connect the box body proper and the sampling module, the binding force between the box body proper and the sampling module can be improved to enhance the structural strength of the box body proper, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body; the sampling module is thermally press-connected to the box body proper. On the one hand, through the thermal pressing process, the box body proper and the sampling module can be combined into one body, and the box body proper and the sampling module can be closely attached to each other; on the other hand, the connection firmness and reliability between the box body proper and the sampling module can be improved, and at the same time, there is no need to set a component for connecting the box body proper and the sampling module between the box body proper and the sampling module, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body.
[0024] In some embodiments, the sampling module is connected to the bus bar.
[0025] In the above technical solution, since the box body is respectively connected to the sampling module and the busbar component, the box body plays a role in stably positioning and protecting the connection points of the busbar component and the sampling module, reducing the risk that the connection points of the busbar component and the sampling module crack and break away due to external factors such as vibration, and further improving the structural stability of the connection between the sampling module and the busbar component.
[0026] In some embodiments, the second box body includes a bottom plate and a frame. The bottom plate is used to support the battery cell, and the frame is disposed around the bottom plate; the first box body is connected to the frame and is disposed opposite to the bottom plate.
[0027] In the above technical solution, the second box body includes a bottom plate and a frame. The bottom plate is used to support the battery cell, and the frame is disposed around the bottom plate. Thus, when the battery cell is accommodated in the accommodation cavity, the frame can limit the structural members of the battery device outside the second box body or the structural members of the electrical device having the battery device from touching the battery cell, thereby giving the battery cell a relatively stable working environment and further improving the reliability of the battery device.
[0028] In a second aspect, an embodiment of the present application provides an electrical device, which includes the battery device provided in any one of the embodiments of the first aspect, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0030] Figure 1 Schematic structural diagram of a vehicle provided in some embodiments of the present application;
[0031] Figure 2 Exploded view of the structure of a battery device provided in some embodiments of the present application;
[0032] Figure 3 Cross-sectional view of a first box body provided in some embodiments of the present application;
[0033] Figure 4 Cross-sectional view of another first box body provided in some embodiments of the present application;
[0034] Figure 5 Cross-sectional view of yet another first box body provided in some embodiments of the present application;
[0035] Figure 6 Schematic structural diagram of a battery cell provided in some embodiments of the present application;
[0036] Figure 7 Schematic diagram of another structure of the first box body provided for some embodiments of the present application;
[0037] Figure 8 Schematic diagram of another structure of the first box body without an integrated busbar for some embodiments of the present application;
[0038] Figure 9 is Figure 8 Enlarged view of location A in
[0039] Figure 10 Schematic diagram of another structure of the first box body provided for some embodiments of the present application in another direction.
[0040] Reference numeral 1000 - vehicle; 100 - battery device; 10 - box body; 11 - first box body; 111 - box body main body; 111A - accommodating portion; 111B - through hole; 112 - busbar; 113 - insulating member; 114 - sampling module; 12 - second box body; 121 - bottom plate; 122 - frame; 20 - battery cell; 21 - outer shell; 211 - first wall; 22 - electrode terminal;
[0041] 200 - controller; 300 - motor. Detailed implementation manners
[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0043] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above - mentioned drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above - mentioned drawings are used to distinguish different objects and are not used to describe a specific order or primary - secondary relationship.
[0044] Reference to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.
[0045] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "install", "connect", "attach" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0046] The term "and / or" in this application is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.
[0047] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.
[0048] The term "plurality" as used in this application refers to two or more (including two).
[0049] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.
[0050] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.
[0051] In some embodiments, multiple battery cell assemblies or multiple battery cells within a battery cell assembly may be connected through a busbar.
[0052] In some embodiments, the battery device may be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.
[0053] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.
[0054] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing multiple battery cells to the box body.
[0055] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled so that a closed space is formed inside the box body to accommodate the battery cell assembly. The "closed" here means covered or closed, which may be sealed or non-sealed. The first box body may be a top cover or a bottom plate.
[0056] As an example, the box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.
[0057] As an example, the box body may be part of the chassis structure of a vehicle. For example, the top cover of the box body may become at least part of the floor of the vehicle, or the frame of the box body may become at least part of the cross beam and longitudinal beam of the vehicle.
[0058] In some embodiments, the battery device refers to an energy storage device, which includes a box body, and a door is provided on at least one side of the box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.
[0059] In recent years, electric vehicles have had a leapfrog development. In the field of electric vehicles, the battery device, as the power source of the electric vehicle, plays an irreplaceable and important role. The battery device, as a core component of the electric vehicle, has high requirements in terms of energy density.
[0060] In the battery device assembly scheme, generally, the busbar and the box body are designed separately. After connecting multiple battery cells through the busbar, the multiple battery cells are then accommodated in the box body to form a battery device. Therefore, there is a certain gap between the busbar and the box body, resulting in waste of space inside the box body.
[0061] Based on the above considerations, in order to reduce the space waste inside the box and improve the energy density of the battery device. An embodiment of the present application provides a battery device including a first box body, a second box body and battery cells; the second box body is connected to the first box body, and the second box body and the first box body jointly enclose a containing cavity; a plurality of battery cells are arranged in the containing cavity; wherein, the first box body includes a box body main body and a bus bar, the bus bar is connected to the box body main body, and the bus bar is used to realize the electrical connection of a plurality of battery cells.
[0062] In the battery device with this structure, the first box body includes a box body main body and a bus bar, and the bus bar is connected to the box body main body, so that the bus bar and the box body main body are integrated to form the first box body. Compared with the case where the bus bar and the box body main body are separately arranged, on the one hand, the integrity of the battery device is improved, which is convenient for the assembly of the battery device; on the other hand, the gap between the bus bar and the box body main body is eliminated, so that more space in the containing cavity can be used to accommodate the battery cells, thereby increasing the space utilization rate of the containing cavity, and thus increasing the energy density of the battery device.
[0063] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles and spaceships, etc.
[0064] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device in an embodiment of the present application for illustration.
[0065] Please refer to Figure 1 , Figure 1 FIG. 1000 is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000. The battery device 100 can be arranged at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as an operating power source or a power source for the vehicle 1000, etc. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements of the vehicle 1000 during startup, navigation and driving.
[0066] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source or a power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.
[0067] According to some embodiments of the present application, please refer to Figure 2 and please refer to Figures 3 - 5 , Figure 2 FIG. is an exploded view of the structure of a battery device 100 provided in some embodiments of the present application. Figures 3 - 5 FIG. is a cross-sectional view of three first boxes 11 provided in some embodiments of the present application. Some embodiments of the present application provide a battery device 100 including a first box 11, a second box 12, and battery cells 20; the second box 12 is connected to the first box 11, and the second box 12 and the first box 11 together enclose a receiving cavity; a plurality of battery cells 20 are disposed in the receiving cavity; wherein, the first box 11 includes a box body 111 and a bus bar 112, the bus bar 112 is connected to the box body 111, and the bus bar 112 is used to realize the electrical connection of the plurality of battery cells 20.
[0068] The first box 11 and the second box 12 together form a box 10 for providing an assembly space for the battery cells 20. Exemplarily, the first box 11 and the second box 12 are mutually covered, and the first box 11 and the second box 12 together define an assembly space for accommodating the battery cells 20.
[0069] In some embodiments, the second box 12 can be a hollow structure with one end open, the first box 11 can be a plate-like structure, and the first box 11 covers the open side of the second box 12 so that the first box 11 and the second box 12 together define an assembly space.
[0070] In some embodiments, the first box 11 can be a hollow structure with one end open, the second box 12 can be a plate-like structure, and the second box 12 covers the open side of the first box 11 so that the first box 11 and the second box 12 together define an assembly space.
[0071] In some embodiments, the first box 11 and the second box 12 can also both be hollow structures with one side open, and the open side of the first box 11 covers the open side of the second box 12.
[0072] Of course, the box 10 formed by the first box 11 and the second box 12 can be of various shapes, such as a cylinder, a cuboid, or a cube, etc. Exemplarily, in Figure 2 the shape of the box 10 is a cuboid.
[0073] Understandably, the first box body 11 and the second box body 12 can also be used to accommodate a limiting structure for restricting the movement of the battery cell 20 and a thermal management mechanism for regulating the temperature of the battery cell 20.
[0074] The bus bar 112 is a component that can connect multiple battery cells 20 in series or in parallel to achieve electrical connection between multiple battery cells 20. The bus bar 112 can also be referred to as a bus bar, a tab, or a bus bar strip, generally a metal sheet. The bus bar 112 can be connected to the electrode terminal 22 of the battery cell 20 by welding, conductive adhesive bonding, or abutting, so as to connect multiple battery cells 20 in series or in parallel.
[0075] The box body main body 111 is the main part of the first box body 11. The box body main body 111 and the second box body 12 together enclose a receiving cavity for accommodating the battery cell 20.
[0076] Exemplarily, the box body main body 111 can be a metal part, or can be a plastic part, a plastic-based composite material part, or an inorganic non-metallic material part.
[0077] Understandably, in the embodiment where the box body main body 111 is a metal part, the connection part between the bus bar 112 and the box body main body 111 should be insulated to reduce the risk of internal short circuit in the battery device 100.
[0078] In some embodiments, please refer to Figure 3 , the bus bar 112 is disposed on the inner surface of the box body main body 111 and is located in the receiving cavity to facilitate electrical connection to the battery cell 20.
[0079] In some embodiments, please refer to Figure 4 , the inner surface of the box body main body 111 is recessed to form a receiving portion 111A. A part of the bus bar 112 is located in the receiving portion 111A, and a part of the bus bar 112 protrudes from the inner surface of the box body main body 111 and is located in the receiving cavity to facilitate electrical connection to the battery cell 20.
[0080] In some embodiments, please refer to Figure 5 , the box body main body 111 has a through hole 111B. A part of the bus bar 112 is located in the receiving portion 111A, and a part of the bus bar 112 protrudes from the inner surface of the box body main body 111 and is located in the receiving cavity to facilitate electrical connection to the battery cell 20.
[0081] In this embodiment, the first box body 11 includes a box body main body 111 and a bus bar 112. The bus bar 112 is connected to the box body main body 111, so that the bus bar 112 and the box body main body 111 are integrated to form the first box body 11. Compared with the case where the bus bar 112 and the box body main body 111 are separately arranged, on the one hand, the integrity of the battery device 100 is improved, which is convenient for the assembly of the battery device 100; on the other hand, the gap between the bus bar 112 and the box body main body 111 is eliminated, so that more space in the accommodating cavity can be used to accommodate the battery cells 20, thereby increasing the space utilization rate of the accommodating cavity, and thus increasing the energy density of the battery device 100.
[0082] According to some embodiments of the present application, the box body main body 111 is a plastic part, and the bus bar 112 is a metal part.
[0083] "The box body main body 111 is a plastic part" can be understood as that the box body main body 111 is a plastic part formed by injection molding.
[0084] Exemplarily, the box body main body 111 can be a plastic part injection molded from plastic materials or plastic-based composite materials such as polyamide, polystyrene, and polyester.
[0085] The bus bar 112 can be made of metal materials such as aluminum, aluminum alloy, copper, or copper alloy.
[0086] In this embodiment, on the one hand, the box body main body 111 is a plastic part, and the bus bar 112 is a metal part. Therefore, compared with the box body main body 111, the bus bar 112 has higher structural strength and melting point. When the box body main body 111 and the bus bar 112 are integrated into the first box body 11, the bus bar 112 can improve the structural strength of some areas of the box body main body 111 and improve the high-temperature resistance of some areas of the first box body 11, thereby improving the reliability of the battery device 100. On the other hand, since the box body main body 111 is a plastic part, when it is connected to the bus bar 112, the risk of short circuit between the box body main body 111 and the bus bar 112 is reduced, thereby improving the reliability of the battery device 100. On the other hand, the box body main body 111 is a plastic part, and its cost is lower than that of metal, and its density is also lower than that of metal. Therefore, the manufacturing cost and weight of the battery device 100 can be reduced.
[0087] According to some embodiments of the present application, the box body main body 111 is injection molded on the bus bar 112; or, the bus bar 112 is bonded to the box body main body 111; or, the bus bar 112 is thermally pressed and connected to the box body main body 111.
[0088] "The box body 111 is injection-molded on the bus bar 112" means that during the processing of the first box body 11, by using the insert injection molding process, the bus bar 112 is pre-embedded in the mold as an embedded part and formed into one body with the box body 111 through plastic injection molding.
[0089] It can be understood that after the bus bar 112 is embedded in the box body 111 and injection-molded into one body with the box body 111, the part of the bus bar 112 for directly or indirectly connecting with the battery cell 20 can be exposed from the box body 111.
[0090] "The bus bar 112 is bonded to the box body 111" means that during the processing of the first box body 11, the bus bar 112 is pasted on the box body 111 with an adhesive, and the box body 111 and the bus bar 112 are formed into one body.
[0091] It can be understood that after the bus bar 112 is pasted on the outer surface of the box body 111 to be integrated with the box body 111, the part of the bus bar 112 for directly or indirectly connecting with the battery cell 20 is not covered by the adhesive.
[0092] "The bus bar 112 is thermally compression-connected to the box body 111" means that the box body 111 is softened by heating, and the bus bar 112 is connected to the softened contact surface of the box body 111 by applying pressure, and the box body 111 and the bus bar 112 are formed into one body.
[0093] It can be understood that after the bus bar 112 is embedded in the box body 111 and thermally compression-molded into one body with the box body 111, the part of the bus bar 112 for directly or indirectly connecting with the battery cell 20 can be exposed from the box body 111.
[0094] In this embodiment, by injection molding the box body 111 on the bus bar 112, on the one hand, the bus bar 112 is wrapped by the box body 111, so that the box body 111 plays a role in carrying, positioning and insulating protection for the bus bar 112, and effectively reduces the displacement risk and wear risk of the bus bar 112; on the other hand, it can improve the connection firmness and reliability between the box body 111 and the bus bar 112. At the same time, there is no need to set components for connecting the box body 111 and the bus bar 112 between the box body 111 and the bus bar 112, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11; by bonding the bus bar 112 to the box body 111, on the one hand, the box body 111 plays a role in carrying, positioning and insulating protection for the bus bar 112, and effectively reduces the displacement risk and wear risk of the bus bar 112; on the other hand, by using the bonding method to connect the box body 111 and the bus bar 112, the binding force between the box body 111 and the bus bar 112 can be improved to enhance the structural strength of the box body 111, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11; the bus bar 112 is thermally pressed and connected to the box body 111. On the one hand, through the hot pressing process, the box body 111 and the bus bar 112 can be combined into one body, and the box body 111 and the bus bar 112 can be closely attached to each other; on the other hand, it can improve the connection firmness and reliability between the box body 111 and the bus bar 112. At the same time, there is no need to set components for connecting the box body 111 and the bus bar 112 between the box body 111 and the bus bar 112, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11.
[0095] According to some embodiments of the present application, please refer to Figure 5 and please refer to Figure 6 , the battery cell 20 includes an electrode terminal 22, and the bus bar 112 is welded to the electrode terminal 22; a through hole 111B is provided on the box body 111, and the bus bar 112 is disposed at the through hole 111B.
[0096] In some embodiments, the battery cell 20 includes a housing 21, an electrode assembly and an electrode terminal 22. The electrode assembly is accommodated in the housing 21. The housing 21 has a first wall 211, and the electrode terminal 22 is electrically connected to the electrode assembly and disposed on the first wall 211.
[0097] "The bus bar 112 is disposed at the through hole 111B" can be understood as that at least a part of the bus bar 112 is accommodated in the through hole 111B.
[0098] In some embodiments, the bus bar 112 is entirely accommodated in the through hole 111B.
[0099] In some embodiments, a part of the bus bar 112 is received in the through hole 111B, and another part of the bus bar 112 extends outside the through hole 111B and protrudes from the inner surface of the box body 111.
[0100] It can be understood that, in the embodiment where the bus bar 112 is connected to the electrode terminal 22 by welding, the bus bar 112 can be directly heated through the through hole 111B, so that the connection part between the bus bar 112 and the electrode terminal 22 is melted, and then the bus bar 112 is connected to the electrode terminal 22, so that the bus bar 112 can be electrically connected to the electrode terminals 22 of a plurality of battery cells 20.
[0101] In this embodiment, the bus bar 112 is welded to the electrode terminal 22, and the through hole 111B is provided on the box body 111. The bus bar 112 is arranged at the through hole 111B, so that it is convenient to weld the bus bar 112 and the electrode terminal 22 by the area of the bus bar 112 exposed to the outside through the through hole 111B, thereby reducing the welding difficulty between the bus bar 112 and the electrode terminal 22, which is beneficial to optimizing the production process and production rhythm.
[0102] According to some embodiments of the present application, please refer to Figure 5 and Figure 7 , and please refer to Figure 8 , Figure 7 FIG. 17 is a schematic structural diagram of another first box body 11 provided by some embodiments of the present application, Figure 8 FIG. 18 is a schematic structural diagram of another first box body 11 without the integrated bus bar 112 provided by some embodiments of the present application. The first box body 11 further includes an insulating member 113, and the insulating member 113 covers the area of the bus bar 112 exposed to the outside through the through hole 111B.
[0103] It can be understood that the insulating member 113 should be made of an insulating material. Exemplarily, the insulating member 113 can be a sheet structure or a film structure.
[0104] In some embodiments, a part of the insulating member 113 can cover the area of the bus bar 112 exposed to the outside through the through hole 111B, and another part of the insulating member 113 can cover the outer surface of a part of the box body 111.
[0105] It can be understood that the insulating member 113 can reduce the risk of damage to the bus bar 112 by the external environment, such as friction, collision, moisture and oxygen, etc. At the same time, the insulating member 113 has good insulation performance, which can reduce the risk of short circuit between the bus bar 112 and other structural members of the battery device 100 and the structural members of the electrical device having the battery device 100, thereby improving the reliability of the battery device 100. In addition, the insulating member 113 can also play a role in beautification and improve the appearance quality of the entire battery device 100.
[0106] In this embodiment, the insulating member 113 covers the area of the bus bar 112 exposed to the outside through the through hole 111B, thereby reducing the risk of short - circuit of the battery device 100 caused by the overlap between the area of the bus bar 112 exposed to the outside through the through hole 111B and other structural members of the battery device 100, and reducing the risk of reduction in the reliability of the battery device 100 caused by the corrosion of the area of the bus bar 112 exposed to the outside through the through hole 111B, thereby improving the reliability of the battery device 100.
[0107] According to some embodiments of the present application, the insulating member 113 is a gasket or an adhesive layer.
[0108] In some embodiments, the insulating member 113 is a gasket, and the insulating member 113 is bonded to the area of the bus bar 112 exposed to the outside through the through hole 111B by an adhesive.
[0109] In some embodiments, the insulating member 113 is an adhesive layer, and the insulating member 113 covers the area of the bus bar 112 exposed to the outside through the through hole 111B by brushing.
[0110] In this embodiment, by setting the insulating member 113 as a gasket, the sealing performance of the area of the bus bar 112 exposed to the outside through the through hole 111B is improved by using the gasket, and the sealing structure of the gasket is adopted, which is convenient for later disassembly, repair and replacement; by setting the insulating member 113 as an adhesive layer, the area of the bus bar 112 exposed to the outside through the through hole 111B can be covered by the glue - coating processing method, simplifying the manufacturing process of the first box body 11 and facilitating the processing of the first box body 11.
[0111] According to some embodiments of the present application, please refer to Figure 4 , at least part of the surface of the box - body main body 111 facing the battery cell 20 is recessed to form a receiving portion 111A, and at least part of the bus bar 112 is received in the receiving portion 111A.
[0112] In some embodiments, part of the bus bar 112 is received in the receiving portion 111A, and the other part of the bus bar 112 extends outside the receiving portion 111A and protrudes from the inner surface of the box - body main body 111.
[0113] In this embodiment, by receiving at least part of the bus bar 112 in the receiving portion 111A, the space occupied by the bus bar 112 in the accommodation cavity is reduced, so that more space in the accommodation cavity can be used to accommodate the battery cell 20, thereby further increasing the space utilization rate of the accommodation cavity, and further increasing the energy density of the battery device 100.
[0114] According to some embodiments of the present application, please refer to Figure 9 , Figure 9 is Figure 8An enlarged view of area A in [Chinese]. The first housing 11 further includes a sampling module 114 for collecting information of the battery cell 20, and the sampling module 114 is connected to the housing body 111.
[0115] The sampling module 114 is a component for collecting electrical data of the battery cell 20. The sampling module 114 can be used to collect the voltage and / or temperature of the battery cell 20. Exemplarily, the sampling module 114 may include sampling wires connected to the bus bar 112, and the sampling wires can be copper wires, aluminum wires, silver wires, alloy wires, etc.
[0116] It can be understood that in an embodiment where the housing body 111 is a plastic part, when the sampling module 114 and the housing body 111 are integrated into the first housing 11, the sampling module 114 can improve the structural strength of some areas of the housing body 111, thereby improving the reliability of the battery device 100.
[0117] In this embodiment, the first housing 11 further includes a sampling module 114, and the sampling module 114 is connected to the housing body 111, so that the sampling module 114, the bus bar 112 and the housing body 111 are integrated to form the first housing 11. Compared with the case where the sampling module 114, the bus bar 112 and the housing body 111 are separately arranged, on the one hand, the integrity of the battery device 100 is improved, which is convenient for the assembly of the battery device 100; on the other hand, the gap between the sampling module 114 and the housing body 111 is eliminated, so that more space in the accommodation cavity can be used to accommodate the battery cell 20, thereby further increasing the space utilization rate of the accommodation cavity, and further increasing the energy density of the battery device 100.
[0118] According to some embodiments of the present application, the housing body 111 is injection-molded on the sampling module 114; or, the sampling module 114 is bonded to the housing body 111; or, the sampling module 114 is thermally pressed and connected to the housing body 111.
[0119] "The housing body 111 is injection-molded on the sampling module 114" means that in the process of manufacturing the first housing 11, an insert injection molding process is adopted, the sampling module 114 is pre-embedded in the mold as an embedded part, and through plastic injection molding, the housing body 111 and the sampling module 114 are formed into one body.
[0120] It can be understood that after the sampling module 114 is embedded in the housing body 111 and injection-molded into one body with the housing body 111, the part of the sampling module 114 for directly or indirectly connecting to the bus bar 112 or the battery cell 20 can be exposed from the housing body 111.
[0121] "The sampling module 114 is adhesively bonded to the box body 111" means that during the processing of the first box body 11, the sampling module 114 is pasted on the box body 111 with an adhesive, so that the box body 111 and the sampling module 114 are formed into one body.
[0122] It can be understood that after the sampling module 114 is pasted on the outer surface of the box body 111 and integrated with the box body 111, the part of the sampling module 114 used for directly or indirectly connecting to the bus bar 112 or the battery cell 20 is not covered by the adhesive.
[0123] "The sampling module 114 is thermally compression - connected to the box body 111" means that the box body 111 is softened by heating, and the sampling module 114 is connected to the softened contact surface of the box body 111 by applying pressure, so that the box body 111 and the sampling module 114 are formed into one body.
[0124] It can be understood that after the sampling module 114 is embedded in the box body 111 and thermally compression - formed into one body with the box body 111, the part of the sampling module 114 used for directly or indirectly connecting to the bus bar 112 or the battery cell 20 can be exposed from the box body 111.
[0125] In this embodiment, by injection molding the box body 111 on the sampling module 114, on the one hand, the sampling module 114 is wrapped by the box body 111, so that the box body 111 plays a role of carrying, positioning and insulating protection for the sampling module 114, and effectively reduces the risk of displacement and wear of the sampling module 114; on the other hand, the connection firmness and reliability between the box body 111 and the sampling module 114 can be improved. At the same time, there is no need to set a component for connecting the box body 111 and the sampling module 114 between the box body 111 and the sampling module 114, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11; by bonding the sampling module 114 to the box body 111, on the one hand, the box body 111 plays a role of carrying, positioning and insulating protection for the sampling module 114, and effectively reduces the risk of displacement and wear of the sampling module 114; on the other hand, by using the bonding method to connect the box body 111 and the sampling module 114, the binding force between the box body 111 and the sampling module 114 can be improved to enhance the structural strength of the box body 111, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11; the sampling module 114 is hot-pressed and connected to the box body 111. On the one hand, through the hot-pressing process, the box body 111 and the sampling module 114 can be combined into one body, and the box body 111 and the sampling module 114 can be closely attached to each other; on the other hand, the connection firmness and reliability between the box body 111 and the sampling module 114 can be improved. At the same time, there is no need to set a component for connecting the box body 111 and the sampling module 114 between the box body 111 and the sampling module 114, which is beneficial to optimizing the production process and production rhythm, and can reduce the manufacturing cost of the first box body 11.
[0126] According to some embodiments of the present application, please refer to Figure 9 and Figure 10 , Figure 10 is a schematic structural diagram of another first box body 11 provided by some embodiments of the present application in another direction. The sampling module 114 is connected to the bus bar 112.
[0127] It can be understood that the sampling module 114 is connected to the bus bar 112 to facilitate collecting the voltage and / or temperature of the battery cell 20 through the bus bar 112.
[0128] In some embodiments, after the sampling module 114 is connected to the bus bar 112, the box body 111 can be connected to the sampling module 114 and the bus bar 112.
[0129] In this embodiment, since the box body 111 is respectively connected to the sampling module 114 and the bus bar 112, the box body 111 plays a role in stabilizing the positioning and protection of the connection points of the bus bar 112 and the sampling module 114, reducing the risk that the connection points of the bus bar 112 and the sampling module 114 crack and break away due to external factors such as vibration, and further improving the structural stability of the connection between the sampling module 114 and the bus bar 112.
[0130] According to some embodiments of the present application, please refer to Figure 2 , the second box body 12 includes a bottom plate 121 and a frame 122. The bottom plate 121 is used to support the battery cells 20, and the frame 122 is disposed around the bottom plate 121; the first box body 11 is connected to the frame 122 and is disposed opposite to the bottom plate 121.
[0131] In this embodiment, the second box body 12 includes a bottom plate 121 and a frame 122. The bottom plate 121 is used to support the battery cells 20, and the frame 122 is disposed around the bottom plate 121. Thus, when the battery cells 20 are accommodated in the accommodation cavity, the frame 122 can limit the structural members of the battery device 100 outside the second box body 12 or the structural members of the electrical device having the battery device 100 from touching the battery cells 20, thereby providing a relatively stable working environment for the battery cells 20, and further improving the reliability of the battery device 100.
[0132] According to some embodiments of the present application, the present application further provides an electrical device. The electrical device includes the battery device 100 of any of the above solutions, and the battery device 100 is used to provide electrical energy for the electrical device.
[0133] Among them, the electrical device can be a device or system that applies any of the foregoing battery devices 100.
[0134] According to some embodiments of the present application, referring to Figures 2 - 10 , the present application provides a battery device 100 including a first box body 11, a second box body 12, and battery cells 20; the second box body 12 is connected to the first box body 11, and the second box body 12 and the first box body 11 jointly enclose an accommodation cavity; a plurality of battery cells 20 are disposed in the accommodation cavity; wherein, the first box body 11 includes a box body 111 and a bus bar 112, the bus bar 112 is connected to the box body 111, and the bus bar 112 is used to realize the electrical connection of a plurality of battery cells 20.
[0135] The box body 111 is a plastic part, and the bus bar 112 is a metal part. The box body 111 is injection molded on the bus bar 112; or, the bus bar 112 is bonded to the box body 111; or, the bus bar 112 is thermally pressed and connected to the box body 111.
[0136] The battery cell 20 includes electrode terminals 22, and the bus bar 112 is welded to the electrode terminals 22. A through hole 111B is provided on the box body 111, and the bus bar 112 is disposed at the through hole 111B. The first box body 11 further includes an insulating member 113, and the insulating member 113 covers the area of the bus bar 112 exposed to the outside through the through hole 111B. The insulating member 113 is a gasket or an adhesive layer.
[0137] The first box body 11 further includes a sampling module 114, and the sampling module 114 is used to collect information of the battery cell 20. The sampling module 114 is connected to the box body 111. The box body 111 is injection molded on the sampling module 114; alternatively, the sampling module 114 is bonded to the box body 111; alternatively, the sampling module 114 is thermally press-connected to the box body 111.
[0138] The second box body 12 includes a bottom plate 121 and a frame 122. The bottom plate 121 is used to support the battery cell 20, and the frame 122 surrounds the bottom plate 121. The first box body 11 is connected to the frame 122 and is disposed opposite to the bottom plate 121.
[0139] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.
[0140] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A battery device, characterized in that: include: The first box; A second box body, connected to the first box body, the second box body and the first box body together enclose a containing cavity; A plurality of battery cells are disposed in the accommodating cavity; The first box body includes a box body and a busbar, the busbar is integrated with the box body, and the busbar is used to realize electrical connection of a plurality of battery cells.
2. The battery device according to claim 1, characterized in that The box body is a plastic part, and the busbar is a metal part.
3. The battery device according to claim 2, characterized in that: The box body is injection molded on the busbar; or, the busbar is bonded to the box body; or, the busbar is hot-pressed connected to the box body.
4. The battery device according to claim 1, wherein: The battery cell includes an electrode terminal, and the busbar is welded to the electrode terminal; The box body is provided with a through hole, and the current collector is arranged at the through hole.
5. The battery device according to claim 4, characterized in that: The first box body further includes an insulating member, and the insulating member covers the area of the busbar exposed to the outside through the through hole.
6. The battery device according to claim 5, characterized in that The insulating member is a sealing gasket or a rubber layer.
7. The battery device according to claim 1, characterized in that: A surface of the box body facing the battery cell is at least partially recessed to form a receiving portion, and at least a portion of the current collector is received in the receiving portion.
8. The battery device according to claim 1, wherein: The first box body further includes a sampling module, which is used to collect information of the battery cells, and the sampling module is connected to the box body.
9. The battery device according to claim 8, characterized in that: The box body is injection molded on the sampling module; or, the sampling module is bonded to the box body; or, the sampling module is connected to the box body by hot pressing.
10. The battery device according to claim 8, characterized in that The sampling module is connected to the current collector.
11. The battery device according to claim 1, wherein: The second box body includes a bottom plate and a frame, the bottom plate is used to support the battery monomer, and the frame is surrounded by the bottom plate; The first box is connected to the frame and is arranged opposite to the bottom plate.
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 provide electrical energy.