Battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device. The battery device comprises a box body, a plurality of battery monomers and an integrated busbar, an opening is formed in one end of the box body along a first direction, the integrated busbar comprises an insulating cover plate and a confluence structure, the insulating cover plate covers the opening and is connected with the box body, the plurality of battery monomers are arranged in a space enclosed by the insulating cover plate and the box body, and the confluence structure is arranged on the insulating cover plate. The confluence structure is arranged on one side, deviating from the battery monomers, of the insulating cover plate, a through hole is formed in the insulating cover plate, a pole is arranged on one side, facing the opening, of each battery monomer, and the pole is in contact and connected with the confluence structure through the through hole. According to the battery device provided by the embodiment of the invention, the insulating cover plate is connected with the box body, and the confluence structure is arranged on the insulating cover plate, so that the rigidity of the whole formed by the integrated busbar and the box body is increased, the overall rigidity of the battery device is favorably improved, and the dominant frequency of the battery device is favorably improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device and an electrical device. Background Technology

[0002] Battery devices are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with battery devices are already widely used. In addition, battery devices are increasingly being used in the field of energy storage.

[0003] As market demand for battery devices increases, the performance requirements for these devices are also rising. In related technologies, the relatively low operating frequency of battery devices makes them prone to resonance with the vehicle, thus affecting their performance and safety. Utility Model Content

[0004] In view of this, embodiments of this application aim to provide a battery device and an electrical device that can improve the main frequency of the battery device.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a battery device, including a housing, multiple battery cells, and an integrated busbar. The housing has an opening at one end along a first direction. The integrated busbar includes an insulating cover and a busbar structure. The insulating cover covers the opening and is connected to the housing. Multiple battery cells are disposed within the space enclosed by the insulating cover and the housing. The busbar structure is disposed on the insulating cover and is electrically connected to the battery cells. The busbar structure is disposed on the side of the insulating cover away from the battery cells. The insulating cover has through holes. A terminal post is disposed on the side of the battery cell facing the opening. The terminal post contacts and connects to the busbar structure through the through holes.

[0007] In the above technical solution, since the insulating cover is connected to the housing and the busbar structure is located on the insulating cover, the overall rigidity of the integrated busbar and housing is increased, which is beneficial to improving the overall rigidity of the battery device and thus improving the main frequency of the battery device. The busbar structure is located on the side of the insulating cover away from the battery cells, which reduces the probability of weld slag falling between the battery cells during welding and puncturing the blue film or outer shell of the battery cells, causing insulation damage or short circuits.

[0008] In some implementations, the busbar structure is bonded to the insulating cover; or, the busbar structure is fused to the insulating cover.

[0009] In the above technical solution, the busbar structure is bonded or fused to the insulating cover plate, which can improve the connection stability between the busbar structure and the insulating cover plate, thereby increasing the main frequency of the battery device.

[0010] In some embodiments, the housing includes a peripheral wall and a bottom wall, the bottom wall being disposed at a first end of the peripheral wall along a first direction, the second end of the peripheral wall along the first direction being open to form an opening, and an insulating cover abutting against the end face of the second end of the peripheral wall along the first direction.

[0011] In the above technical solution, the insulating cover plate abuts against the end face of the second end of the peripheral wall along the first direction. The force applied to the insulating cover plate from the outside can be applied to the peripheral wall in the vertical direction, so that the box can withstand a large force, which is beneficial to improving the stability of the battery device.

[0012] In some embodiments, the battery device includes a first seal disposed between an insulating cover and an end face of a second end of a peripheral wall along a first direction.

[0013] In the above technical solution, the first sealing element can seal the gap between the insulating cover and the peripheral wall, improve the sealing performance of the battery device, and reduce the possibility of dust, water vapor, and liquid entering the box, which could lead to the failure of the battery cell performance.

[0014] In some embodiments, the insulating cover is bonded to the housing, or the battery device includes a plurality of connectors, one end of which passes through the insulating cover and is threaded to the housing.

[0015] In the above technical solution, the insulating cover is bonded to the box or connected by a connector, which can improve the connection stability between the insulating cover and the box and is beneficial to improving the main frequency of the battery device.

[0016] In some embodiments, the battery device includes a protective cover disposed on the side of the insulating cover plate away from the plurality of battery cells, and the protective cover is sealed to the housing.

[0017] In the above technical solution, the protective cover can reduce the problem of short circuit of battery cells and electric shock caused by contact between personnel or external components and the busbar structure. The protective cover is sealed to the box to close the opening, which can reduce the possibility of foreign objects such as dust and liquid entering the box and causing failure of battery cells and busbar structure.

[0018] In some embodiments, the battery device includes a second seal disposed between an insulating cover and a protective cover.

[0019] In the above technical solution, the second sealing element can seal the gap between the insulating cover and the protective cover, improve the sealing performance of the battery device, and reduce the possibility of dust, water vapor, and liquid entering the space enclosed by the insulating cover and the protective cover, which could lead to failure of the busbar structure.

[0020] In some embodiments, the battery device includes a connection structure that connects the busbar structure and the protective cover.

[0021] In the above technical solution, the connection structure connects the busbar and the protective cover, which helps to improve the overall rigidity of the integrated busbar, protective cover and enclosure.

[0022] In some implementations, the connecting structure is foam adhesive.

[0023] In the above technical solution, the foam adhesive can fill the gap between the manifold structure and the protective cover, and at the same time play a role in buffering and shock absorption, reducing the probability of external impacts being transmitted to the manifold structure through the protective cover.

[0024] In some embodiments, the insulating cover is bonded to the protective cover, or the battery device includes a plurality of connectors, one end of which passes through the protective cover and is threaded to the insulating cover.

[0025] In the above technical solution, the protective cover is bonded to the insulating cover or connected by a connector, which can improve the connection stability between the protective cover and the insulating cover and is beneficial to improving the main frequency of the battery device.

[0026] In some embodiments, the battery device includes a protective film disposed on the side of the insulating cover away from the plurality of battery cells and sealed to the insulating cover, the protective film covering the busbar structure.

[0027] In the above technical solution, the protective film can play a sealing role. At the same time, the protective film is relatively thin, which can reduce the size of the battery device in the height direction, thereby improving the space utilization rate of the battery cell in the height direction.

[0028] Secondly, embodiments of this application provide an electrical device, including a battery device, which is used to store or provide electrical energy. Attached Figure Description

[0029] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0030] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0032] Figure 4 for Figure 3 A partial structural schematic diagram of the battery device shown.

[0033] Figure 5 for Figure 3 An exploded view of the battery device shown.

[0034] Figure 6 for Figure 5A schematic diagram of the integrated busbar structure of the battery device shown.

[0035] Figure 7 An exploded view of the integrated busbar provided in some embodiments of this application;

[0036] Figure 8 An exploded view of the integrated busbar provided for some embodiments of this application.

[0037] Explanation of reference numerals in the attached figures

[0038] 1000, Vehicle; 200, Controller; 300, Motor; 100, Battery Unit; 10, Housing; 11, First Housing; 12, Second Housing; 13, Receiving Cavity; 14, Opening; 15, Peripheral Wall; 16, Bottom Wall; 20, Battery Cell; 21, Terminal Post; 30, Integrated Busbar; 31, Insulating Cover; 32, Busbar Structure; 33, Through Hole; 34, Mounting Groove; 40, First Seal; 50, Connector; 60, Protective Cover; 70, Second Seal. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0041] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0042] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0043] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0044] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0045] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0046] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0047] A battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive current collector includes a current collector body and a positive electrode tab. The positive active material layer is coated on the surface of the current collector body, while the positive electrode tab is not coated with the positive active material layer and protrudes from the current collector body. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative current collector includes a current collector body and a negative electrode tab. The negative active material layer is coated on the surface of the current collector body, while the negative electrode tab is not coated with the negative active material layer and protrudes from the current collector body. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0048] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0049] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0050] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0051] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0052] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0053] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0054] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0055] In some embodiments, the battery device can be an energy storage device. Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0056] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0057] In related technologies, the busbar component is mounted on a bracket, which in turn supports the battery cell. The bracket and the top cover are two independent components with no assembly relationship, resulting in a low main frequency of the battery device.

[0058] The dominant frequency mentioned in this application refers to the first natural frequency, which is the lowest-order vibration frequency of the battery device and the one most easily excited. If the dominant frequency of the battery device is low, the frequency of external excitation is likely to approach the dominant frequency of the battery device, thereby causing resonance and resulting in a sharp increase in the vibration amplitude of the battery device, which in turn affects the performance and safety of the battery device.

[0059] In view of this, this application proposes a battery device including a housing, multiple battery cells and an integrated busbar. The housing has an opening at one end along a first direction. The integrated busbar includes an insulating cover and a busbar structure. The insulating cover covers the opening and is connected to the housing. The multiple battery cells are disposed in the space enclosed by the insulating cover and the housing. The busbar structure is disposed on the insulating cover and is electrically connected to the battery cells.

[0060] Because the insulating cover is connected to the housing, and the busbar structure is located on the insulating cover, the overall rigidity of the integrated busbar and housing is increased, which helps to improve the overall rigidity of the battery pack and thus improve the main frequency of the battery pack. For example, when the battery pack is installed in a vehicle, it helps to reduce the probability of resonance between the battery pack and the vehicle, reduces noise, and thus improves the overall comfort of the vehicle.

[0061] The technical solutions described in the embodiments of this application are applicable to electrical devices that include battery devices.

[0062] This application provides an electrical device that uses a battery, such as a mobile phone, portable device, laptop computer, electric vehicle, electric toy, power tool, vehicle, ship, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0063] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0064] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0065] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0066] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which overlap each other, together defining a space for accommodating the battery cell 20. The second housing 12 may be a hollow structure with one open end, and the first housing 11 may be a plate-like structure, with the first housing 11 covering the open side of the second housing 12 so that the first housing 11 and the second housing 12 together define the space. Alternatively, both the first housing 11 and the second housing 12 may be hollow structures with one open side, with the open side of the first housing 11 covering the open side of the second housing 12. 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, etc.

[0067] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0068] Please see Figures 3 to 7 This application provides a battery device 100, including a housing 10, a plurality of battery cells 20, and an integrated busbar 30. The housing 10 has an opening 14 at one end along a first direction. The integrated busbar 30 includes an insulating cover plate 31 and a busbar structure 32. The insulating cover plate 31 covers the opening 14 and is connected to the housing 10. The plurality of battery cells 20 are disposed in the space enclosed by the insulating cover plate 31 and the housing 10. The busbar structure 32 is disposed on the insulating cover plate 31 and is electrically connected to the battery cells 20. The busbar structure 32 is disposed on the side of the insulating cover plate 31 away from the battery cells 20. The insulating cover plate 31 has a through hole 33. The battery cells 20 have a terminal post 21 on the side facing the opening 14. The terminal post 21 contacts and connects to the busbar structure 32 through the through hole 33.

[0069] The housing 10 is used to provide a space for the battery cell 20. The housing 10 can be of various shapes, such as a cylinder or a cuboid.

[0070] The first direction can be the height direction of the battery device 100, that is, the vertical direction.

[0071] The housing 10 has a receiving cavity 13, and the opening 14 communicates with the receiving cavity 13, allowing the battery cell 20 to enter the receiving cavity 13 through the opening 14. The battery cell 20 can be partially or completely disposed in the receiving cavity 13.

[0072] Multiple battery cells 20 can be connected in series and / or in parallel, including the following situations: First: Multiple battery cells 20 connected in series. Second: Multiple battery cells 20 connected in parallel. Third: Multiple battery cells 20 may be connected in both series and parallel configurations, which can also be called mixed connection.

[0073] Multiple battery cells 20 can be directly connected in series and / or in parallel, and then the whole composed of multiple battery cells 20 can be housed in the housing 10; of course, multiple battery cells 20 can first be connected in series and / or in parallel to form a battery module, and then multiple battery modules can be connected in series and / or in parallel to form a whole, and housed in the housing 10.

[0074] The insulating cover 31 can be made of a non-metallic material, such as plastic. This can insulate the busbar structure 32 while reducing the weight of the insulating cover 31, which is beneficial to improving the energy density of the battery device 100.

[0075] The insulating cover 31 covers the opening 14, meaning that the projection of the opening 14 is located within the projection of the insulating cover 31 when projected onto a plane perpendicular to the height direction of the housing 10.

[0076] The insulating cover 31 can be directly connected to the housing 10, or it can be indirectly connected through a connecting layer.

[0077] The insulating cover 31 can be connected to the inner wall of the housing 10 on the side facing the battery cell 20, meaning the connection point between the insulating cover 31 and the housing 10 is located within the receiving cavity 13. Alternatively, the insulating cover 31 can be connected to the outer wall of the housing 10 on the side away from the battery cell 20, or the insulating cover 31 can be connected to the end face of the housing 10 along the first direction and near the opening 14, meaning the connection point between the insulating cover 31 and the housing 10 is located outside the receiving cavity 13.

[0078] The volume of the space enclosed by the insulating cover 31 and the housing 10 can be greater than, equal to, or less than the volume of the receiving cavity 13. In some embodiments, the insulating cover 31 is at least partially located within the receiving cavity 13, in which case the volume of the space enclosed by the insulating cover 31 and the housing 10 is less than the volume of the receiving cavity 13. In other embodiments, the insulating cover 31 is located outside the receiving cavity 13, and the surface of the insulating cover 31 facing the receiving cavity 13 coincides with the plane forming the opening 14 of the housing 10, in which case the volume of the space enclosed by the insulating cover 31 and the housing 10 is equal to the volume of the receiving cavity 13. In still other embodiments, the insulating cover 31 is located outside the receiving cavity 13, and the insulating cover 31 protrudes at least partially from the side away from the receiving cavity 13, in which case the volume of the space enclosed by the insulating cover 31 and the housing 10 is greater than the volume of the receiving cavity 13.

[0079] The busbar structure 32 can be a bar, including but not limited to aluminum bar, copper bar, etc.

[0080] The positive electrode of one battery cell 20 and the negative electrode of an adjacent battery cell 20 can be connected in series through a bus structure 32. The positive electrodes of two adjacent battery cells 20 can be connected in series through a bus structure 32, and the negative electrodes of two adjacent battery cells 20 can be connected in parallel through another bus structure 32.

[0081] The terminal 21 is a metal conductive terminal led out from inside the battery cell 20, through which electrical energy can be input and output. The terminal 21 includes a positive terminal 21 and a negative terminal 21, which can be located on the same side of the battery cell 20.

[0082] Contact between the electrode post 21 and the busbar structure 32 means that the surface of the electrode post 21 is in direct contact with the surface of the busbar structure 32. Alternatively, the electrode post 21 can contact the busbar structure 32 through a through-hole 33. This can be achieved by the electrode post 21 extending towards the busbar structure 32, passing through the through-hole 33 to contact the busbar structure 32; or by the busbar structure 32 extending towards the electrode post 21, passing through the through-hole 33 to contact the electrode post 21; or by both the electrode post 21 and the busbar structure 32 extending towards the electrode post 21, with both passing through the through-hole 33 and making contact.

[0083] The connection between the terminal post 21 and the busbar structure 32 refers to the connection between the terminal post 21 and the busbar structure 32 by means of welding or other methods, so as to realize the flow of current between the battery cell 20 and the busbar structure 32.

[0084] In the above technical solution, since the insulating cover plate 31 is connected to the housing 10 and the busbar structure 32 is disposed on the insulating cover plate 31, the rigidity of the integrated busbar 30 and the housing 10 is increased, which is beneficial to improving the overall rigidity of the battery device 100, thereby improving the main frequency of the battery device 100. For example, when the battery device 100 is assembled into a vehicle 1000, it helps to reduce the probability of resonance between the battery device 100 and the vehicle 1000, reduces noise, and thus improves the overall comfort experience of the vehicle 1000. The busbar structure 32 is disposed on the side of the insulating cover plate 31 away from the battery cell 20, which can reduce the probability of welding slag falling between the battery cells 20 during the welding of the busbar structure 32 and puncturing the blue film or shell of the battery cell 20, causing insulation damage or short circuit.

[0085] In some embodiments, the pole 21 and the bus structure 32 can be electrically connected by a wire.

[0086] In some embodiments, the side of the insulating cover plate 31 facing away from the battery cell 20 can form a mounting groove 34, and the busbar structure 32 is disposed in the mounting groove 34. The bottom wall of the mounting groove 34 has a through hole 33, and the terminal post 21 of the battery cell 20 passes through the through hole 33 and connects to the busbar structure 32.

[0087] Combination Figure 7 In some embodiments, an insulating cover plate 31 forms a mounting groove 34 on the side opposite to the battery cell 20, and multiple busbar structures 32 are disposed in the mounting groove 34. Multiple through holes 33 are formed on the bottom wall of the mounting groove 34, and the multiple through holes 33 are spaced apart.

[0088] Combination Figure 8In other embodiments, the insulating cover 31 has multiple mounting grooves 34 on the side opposite to the battery cell 20. The multiple mounting grooves 34 are spaced apart, and multiple busbar structures 32 are respectively disposed in the multiple mounting grooves 34. The bottom wall of each mounting groove 34 forms one through hole 33 or two spaced through holes 33. Providing multiple mounting grooves 34 can reduce the risk of short circuit caused by accidental contact of the busbar structures 32 before welding.

[0089] The multiple through holes 33 on the insulating cover plate 31 are spaced apart, which can increase the creepage distance between the terminals 21 of the battery cell 20 and further improve the high voltage protection performance.

[0090] In some embodiments, the busbar structure 32 is bonded to the insulating cover plate 31; or, the busbar structure 32 is fused to the insulating cover plate 31.

[0091] Specifically, the busbar structure 32 and the insulating cover plate 31 can be formed separately first, and then the busbar structure 32 and the insulating cover plate 31 can be fixed together. For example, a positioning post is formed on the insulating cover plate 31, and a positioning hole is formed on the busbar structure 32. The positioning post passes through the positioning hole, and then the busbar structure 32 and the insulating cover plate 31 are bonded together with an adhesive, or the busbar structure 32 and the insulating cover plate 31 are fused together using a hot riveting method. In the above technical solution, the busbar structure 32 and the insulating cover plate 31 are bonded or fused together, which can improve the connection stability between the busbar structure 32 and the insulating cover plate 31, thereby increasing the main frequency of the battery device 100.

[0092] In some embodiments, the busbar structure 32 and the insulating cover plate 31 are injection molded. For example, the busbar structure 32 is placed in an injection mold, molten resin is injected into the injection mold, and after the mold is opened, the busbar structure 32 and the insulating cover plate 31 are combined together.

[0093] Please see Figure 4 and Figure 5 In some embodiments, the housing 10 includes a peripheral wall 15 and a bottom wall 16. The bottom wall 16 is disposed at a first end of the peripheral wall 15 along a first direction, and the second end of the peripheral wall 15 along the first direction is open to form an opening 14. An insulating cover plate 31 abuts against the end face of the second end of the peripheral wall 15 along the first direction.

[0094] The bottom wall 16 provides support for the peripheral wall 15 and the battery cell 20, and the bottom wall 16 and the peripheral wall 15 together form a receiving cavity 13. The peripheral wall 15 provides circumferential protection for the battery cell 20, reducing the impact of the external environment on the battery cell 20 from the circumferential direction.

[0095] The first end of the peripheral wall 15 along the first direction can be the bottom end of the peripheral wall 15 along the height direction, and the second end of the peripheral wall 15 along the first direction can be the top end of the peripheral wall 15 along the height direction. That is to say, the bottom wall 16 can be located below the peripheral wall 15, and the opening 14 is formed above the peripheral wall 15.

[0096] The peripheral wall 15 and the bottom wall 16 can be integrally formed, or they can be fixedly connected by welding, bonding or other methods.

[0097] The insulating cover 31 abuts against the end face of the second end of the peripheral wall 15 along the first direction. The insulating cover 31 can directly abut against the end face of the second end of the peripheral wall 15 along the first direction, or the insulating cover 31 can indirectly abut against the end face of the second end of the peripheral wall 15 along the first direction through an intermediate component.

[0098] In the above technical solution, the insulating cover plate 31 abuts against the end face of the second end of the peripheral wall 15 along the first direction. The force applied to the insulating cover plate 31 from the outside can be applied to the peripheral wall 15 in the vertical direction, so that the box 10 can withstand a large force, which is beneficial to improving the stability of the battery device 100.

[0099] Please see Figure 5 In some embodiments, the battery device 100 includes a first seal 40 disposed between the end face of the insulating cover 31 and the second end of the peripheral wall 15 along a first direction.

[0100] The first sealing element 40 can be a gasket, structural adhesive, or double-sided adhesive.

[0101] The first sealing element 40 can be first placed on the surface of the insulating cover plate 31 facing the peripheral wall 15, and then the insulating cover plate 31 can be placed on the end face of the second end of the peripheral wall 15 along the first direction. Alternatively, the first sealing element 40 can be first placed on the end face of the second end of the peripheral wall 15 along the first direction, and then the insulating cover plate 31 can be placed on the first sealing element 40.

[0102] In the above technical solution, the first sealing element 40 can seal the gap between the insulating cover plate 31 and the peripheral wall 15, improve the sealing performance of the battery device 100, and reduce the possibility of dust, water vapor and liquid entering the housing 10, which may lead to the failure of the battery cell 20.

[0103] Please see Figure 4 and Figure 5 In some embodiments, the insulating cover 31 is bonded to the housing 10, or the battery device 100 includes a plurality of connectors 50, one end of which passes through the insulating cover 31 and is threaded to the housing 10.

[0104] When the first sealing element 40 is a structural adhesive or double-sided adhesive, the insulating cover plate 31 and the housing 10 can be sealed and bonded by the first sealing element 40.

[0105] Multiple connectors 50 can be arranged at intervals along the circumference of the insulating cover plate 31. That is, the connectors 50 can connect the periphery of the insulating cover plate 31 and the periphery wall 15 of the housing 10, which can reduce the occupation of the receiving cavity 13 and improve the space utilization of the receiving cavity 13.

[0106] The connector 50 can be a bolt, screw, etc. When the first sealing element 40 is a sealing gasket, through holes are formed on both the insulating cover plate 31 and the first sealing element 40, and threaded holes are formed on the peripheral wall 15 of the housing 10. The connector 50 passes through the through holes on the insulating cover plate 31 and the first sealing element 40 in sequence and then screws into the threaded hole on the peripheral wall 15 to seal the insulating cover plate 31 and the housing 10.

[0107] In the above technical solution, the insulating cover 31 is bonded to the housing 10 or connected by the connector 50, which can improve the connection stability between the insulating cover 31 and the housing 10 and is conducive to improving the main frequency of the battery device 100.

[0108] Please see Figure 3 and Figure 5 In some embodiments, the battery device 100 includes a protective cover 60 disposed on the side of the insulating cover plate 31 away from the plurality of battery cells 20, and the protective cover 60 is sealed to the housing 10.

[0109] The protective cover 60 can be made of metal through sheet metal processing, composite materials, or plastic through injection molding or vacuum forming. Using a non-metallic material for the protective cover 60 can reduce its weight and increase the energy density of the battery device 100.

[0110] The protective cover 60 is located on the side of the insulating cover 31 away from the multiple battery cells 20, that is, the insulating cover 31 is located between the protective cover 60 and the battery cells 20.

[0111] Since the protective cover 60 is sealed to the housing 10, the protective cover 60 and the housing 10 form a closed space, so that the integrated busbar 30 is located in the closed space, which further improves the sealing performance of the battery device.

[0112] In the above technical solution, the protective cover 60 can reduce the problem of short circuit of battery cell 20 and electric shock caused by contact between personnel or external components and the busbar structure 32. The protective cover 60 is sealed to the box 10, which can reduce the possibility of foreign objects such as dust and liquid entering the box 10 and causing the battery cell 20 and busbar structure 32 to fail.

[0113] Please see Figure 5 In some embodiments, the battery device 100 includes a second seal 70 disposed between the insulating cover 31 and the protective cover 60.

[0114] The second seal 70 can be a gasket, structural adhesive, or double-sided adhesive.

[0115] Alternatively, the second sealing element 70 can be placed first on the surface of the insulating cover 31 facing the protective cover 60, and then the protective cover 60 can be placed on the second sealing element 70.

[0116] In the above technical solution, the second sealing element 70 can seal the gap between the insulating cover plate 31 and the protective cover 60, improve the sealing performance of the battery device 100, and reduce the possibility of dust, water vapor and liquid entering the space enclosed by the insulating cover plate 31 and the protective cover 60, which may lead to the failure of the busbar structure 32.

[0117] In some embodiments, the battery device 100 includes a connection structure that connects the busbar structure 32 and the protective cover 60.

[0118] It should be noted that the connecting structure connects the busbar structure 32 and the protective cover 60 in an insulated manner. In other words, the connecting structure is not conductive, and current will not flow between the busbar structure 32 and the protective cover 60 through the connecting structure.

[0119] In the above technical solution, the connection structure between the busbar 32 and the protective cover 60 is beneficial to improving the overall rigidity of the integrated busbar 30, the protective cover 60 and the enclosure 10.

[0120] In some implementations, the connecting structure is foam adhesive.

[0121] Foam adhesive is a composite material made by coating both sides of foamed foam with a strong acrylic adhesive.

[0122] The substrate for foam can be EVA foam, PE foam, PU foam, acrylic foam, and high-density foam, etc. The adhesive can be oil-based adhesive, hot melt adhesive, rubber, and acrylic adhesive, etc.

[0123] In the above technical solution, the foam adhesive can fill the gap between the manifold structure 32 and the protective cover 60, and at the same time play a role in buffering and shock absorption, reducing the probability of external impacts being transmitted to the manifold structure 32 through the protective cover 60.

[0124] Please see Figure 3 and Figure 5In some embodiments, the insulating cover 31 is bonded to the protective cover 60, or the battery device 100 includes a plurality of connectors 50, one end of which passes through the protective cover 60 and is threadedly connected to the insulating cover 31.

[0125] When the second seal 70 is a structural adhesive or double-sided adhesive, the insulating cover 31 and the protective cover 60 can be sealed and bonded together by the second seal 70.

[0126] Multiple connectors 50 can be arranged at intervals along the circumference of the protective cover 60, meaning that the connectors 50 can connect the periphery of the protective cover 60 and the periphery of the insulating cover 31. This allows the external force to be applied to the housing 10 through the periphery of the protective cover 60 to the periphery of the insulating cover 31. By appropriately setting the distance between the periphery of the insulating cover 31 and the busbar structure 32, the impact of external forces on the busbar structure 32 on the insulating cover 31 can be reduced.

[0127] The connector 50 can be a bolt, screw, etc. When the second seal 70 is a gasket, both the protective cover 60 and the second seal 70 have through holes, and the insulating cover 31 has a threaded hole. The connector 50 passes through the through holes on the protective cover 60 and the second seal 70 in sequence and then screws into the threaded hole on the insulating cover 31 to seal the protective cover 60 and the insulating cover 31.

[0128] In some embodiments, the first sealing element 40 is a structural adhesive or double-sided adhesive, and the second sealing element 70 is a structural adhesive or double-sided adhesive. The insulating cover 31 is sealed and bonded to the housing 10 through the first sealing element 40, and the protective cover 60 is sealed and bonded to the insulating cover 31 through the second sealing element 70.

[0129] In other embodiments, the first seal 40 and the second seal 70 are both gaskets. The protective cover 60, the second seal 70, the insulating cover 31 and the first seal 40 are all formed with through holes. The peripheral wall 15 of the housing 10 is formed with threaded holes. The connector 50 passes through the through holes on the protective cover 60, the second seal 70, the insulating cover 31 and the first seal 40 in sequence and then screws into the threaded hole on the insulating cover 31 to seal the protective cover 60, the insulating cover 31 and the housing 10.

[0130] In some other embodiments, the first sealing element 40 is structural adhesive or double-sided adhesive, the second sealing element 70 is a sealing gasket, the insulating cover plate 31 is sealed and bonded to the housing 10 through the first sealing element 40, and the protective cover 60 is sealed and connected to the insulating cover plate 31 through the connector 50 and the second sealing element 70.

[0131] In some embodiments, the first sealing element 40 is a sealing gasket, the second sealing element 70 is structural adhesive or double-sided adhesive, the protective cover 60 is sealed and bonded to the insulating cover plate 31 through the second sealing element 70, and the insulating cover plate 31 is sealed and connected to the box body 10 through the connector 50 and the first sealing element 40.

[0132] In the above technical solution, the protective cover 60 is bonded to the insulating cover plate 31 or connected by the connector 50, which can improve the connection stability between the protective cover 60 and the insulating cover plate 31 and is conducive to improving the main frequency of the battery device 100.

[0133] In some embodiments, the battery device 100 includes a protective film disposed on the side of the insulating cover 31 away from the plurality of battery cells 20 and sealed to the insulating cover 31, the protective film covering the busbar structure 32.

[0134] The protective film can be a PET film (polyethylene terephthalate film) or a PI film (polyimide film), and the protective film can be applied to the insulating cover plate 31 by a hot pressing process.

[0135] It should be noted that the protective film can cover only the manifold structure 32 or the entire insulating cover plate 31. In other words, the protective film only needs to reduce the entry of external dust, moisture, and liquid into the manifold structure 32 and the through hole 33.

[0136] In the above technical solution, the protective film can play a sealing role. At the same time, the protective film is thin, which can reduce the size of the battery device 100 in the height direction, thereby improving the space utilization rate of the battery cell 20 in the height direction.

[0137] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0138] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: A housing, wherein an opening is formed at one end of the housing along a first direction; Multiple battery cells; An integrated busbar includes an insulating cover and a busbar structure. The insulating cover covers the opening and is connected to the housing. A plurality of battery cells are disposed within the space enclosed by the insulating cover and the housing. The busbar structure is disposed on the insulating cover and is electrically connected to the battery cells. The busbar structure is disposed on the side of the insulating cover away from the battery cells. The insulating cover has a through hole. A terminal post is disposed on the side of the battery cell facing the opening. The terminal post contacts and connects to the busbar structure through the through hole.

2. The battery device according to claim 1, characterized in that, The busbar structure is bonded to the insulating cover plate; or, the busbar structure is fused to the insulating cover plate.

3. The battery device according to claim 1, characterized in that, The enclosure includes a peripheral wall and a bottom wall. The bottom wall is disposed at a first end of the peripheral wall along the first direction. The peripheral wall is open at a second end along the first direction to form the opening. The insulating cover plate abuts against the end face of the second end of the peripheral wall along the first direction.

4. The battery device according to claim 3, characterized in that, The battery device includes a first seal disposed between the insulating cover and the end face of the second end of the peripheral wall along the first direction.

5. The battery device according to claim 1, characterized in that, The insulating cover is bonded to the housing, or the battery device includes multiple connectors, one end of which passes through the insulating cover and is threaded to the housing.

6. The battery device according to claim 1, characterized in that, The battery device includes a protective cover, which is disposed on the side of the insulating cover plate away from the plurality of battery cells, and the protective cover is sealed to the housing.

7. The battery device according to claim 6, characterized in that, The battery device includes a second seal disposed between the insulating cover and the protective cover.

8. The battery device according to claim 6, characterized in that, The battery device includes a connection structure that connects the busbar structure and the protective cover.

9. The battery device according to claim 8, characterized in that, The connecting structure is foam adhesive.

10. The battery device according to claim 6, characterized in that, The insulating cover is bonded to the protective cover, or the battery device includes a plurality of connectors, one end of which passes through the protective cover and is threadedly connected to the insulating cover.

11. The battery device according to claim 1, characterized in that, The battery device includes a protective film disposed on the side of the insulating cover away from the plurality of battery cells and sealed to the insulating cover, the protective film covering the busbar structure.

12. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-11, the battery device being used to store or provide electrical energy.

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