Battery device and electric device

Abstract

The application relates to the technical field of battery structure, and provides a battery device and a power utilization device. A first beam body of the battery device divides a containing space to form a first containing cavity and a second containing cavity. A first avoiding groove is formed on one side of the first beam body facing a bottom plate to pass through the first containing cavity and the second containing cavity. A heating structure is arranged on the bottom plate. The heating structure is arranged in the first avoiding groove and arranged in the first containing cavity and the second containing cavity. A battery monomer assembly is arranged in the first containing cavity and connected to the bottom plate. The battery monomer assembly is arranged on the heating structure. When the battery monomer in the battery monomer assembly expands, the deformation amount of one side of the battery monomer connected to the bottom plate is small, so that the tearing influence of the battery monomer on the heating structure is low, the tearing probability of the heating structure is low, and the damage probability of the heating structure can be reduced.

Description

Technical Field

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

[0002] With the rapid development of new energy technologies, battery devices have been widely used in electronic equipment, electric vehicles, electric two-wheelers, power tools and other fields.

[0003] The charging and discharging process of a battery involves complex electrochemical reactions. When the battery is in a low-temperature environment, the efficiency of the electrochemical reactions within the battery is lower, resulting in lower operating efficiency of the battery in a low-temperature environment.

[0004] In related technologies, a heating structure is typically installed inside the battery pack housing. This heating structure is adhered to the side of the battery cell assembly and heats multiple battery cells within the assembly. However, when a battery cell expands, the gap between adjacent cells in the assembly increases, causing the cells to exert tearing forces on the heating structure. Consequently, the heating structure may delaminate or crack, leading to damage. Utility Model Content

[0005] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem in the related art that when the heating structure is placed on the side wall of the battery cell assembly, it is easily affected by the expansion of the battery cell, resulting in cracking or delamination.

[0006] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0007] In a first aspect, embodiments of this application provide a battery device, including a battery cell, a power distribution device, a housing, and a heating structure. Multiple battery cells are arranged sequentially to form a battery cell assembly, and the power distribution device is electrically connected to the battery cell assembly. The housing includes a base plate, a frame, and a first beam. The base plate is connected to one end of the frame and encloses a receiving space. The first beam is disposed within the receiving space, with its opposite ends connected to the frame and the base plate. The first beam divides the receiving space into a first receiving cavity and a second receiving cavity. A through first clearance groove is provided on the side of the first beam facing the base plate, and the first receiving cavity is connected to the second receiving cavity through the first clearance groove. The battery cell assembly is housed within the first receiving cavity and connected to the base plate. The power distribution device is housed within the second receiving cavity. The heating structure is disposed on the base plate. A portion of the heating structure is located within the first receiving cavity, and the battery cell assembly is disposed on the heating structure. Another portion of the heating structure passes through the first clearance groove and is located within the second receiving cavity. The heating structure is electrically connected to the power distribution device.

[0008] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application has a heating structure that can be arranged on the base plate and pass through the first clearance groove. In this way, the power distribution device can supply power to the heating structure and enable the heating structure to heat the battery device. At the same time, when the battery cell assembly is connected to the base plate, the deformation of the side of the battery cell connected to the base plate is smaller when the battery cell expands. As a result, the tearing effect of the battery cell on the heating structure is lower, the probability of the heating structure tearing is lower, and thus the probability of the heating structure being damaged is reduced.

[0009] In some embodiments, at least two first clearance grooves are sequentially spaced apart on the side of the first beam facing the bottom plate along the length direction of the first beam; the number of heating structures is at least two, and multiple heating structures are sequentially spaced apart along the length direction of the first beam and respectively pass through the corresponding first clearance grooves.

[0010] By adopting the above technical solution, multiple heating structures can be sequentially and spaced apart along the length of the first beam. The multiple heating structures can be respectively inserted into the corresponding first clearance groove to realize power supply and heating operation.

[0011] In some embodiments, multiple battery cells are arranged along a direction perpendicular to the length of the first beam to form at least two sets of battery cell assemblies; multiple sets of battery cell assemblies are arranged sequentially along the length of the first beam; heating structures are arranged along a direction perpendicular to the length of the first beam, and each set of battery cell assemblies has at least one heating structure on the side facing the base plate.

[0012] By adopting the above technical solution, multiple sets of battery cell modules can be arranged sequentially along the length of the first beam, and each set of battery cell modules can be heated by at least one heating structure.

[0013] In some embodiments, a groove is formed on the heating structure within the first receiving cavity.

[0014] By adopting the above technical solution, and by opening grooves in the heating structure, the area of ​​the base plate exposed outside the heating structure is larger, thereby increasing the connection area between the battery cells in the battery cell assembly and the base plate.

[0015] In some embodiments, at least one side of the heating structure located within the first receiving cavity is recessed inward to form a groove along the length of the first beam.

[0016] By adopting the above technical solution, the heating structure has a smaller dimension along the length of the first beam, resulting in a larger dimension of the bottom plate exposed outside the heating structure; this can increase the connection area between the battery cell and the bottom plate, thereby improving the overall structural strength of the battery cell assembly and the housing.

[0017] In some embodiments, at least a portion of the groove is located in the middle of the first receiving cavity in a direction perpendicular to the length of the first beam.

[0018] By adopting the above technical solution, the connection area between the base plate and the battery cell in the middle of the first receiving cavity is larger in the direction perpendicular to the length of the first beam, thereby making the connection strength between the base plate and the battery cell in the middle of the first receiving cavity better, and the structural stability of the battery device is better when it is mounted and used.

[0019] In some embodiments, within the first receiving cavity, a first adhesive layer is provided on both the portion of the base plate exposed to the heating structure and the surface of the heating structure, and the battery cell is bonded to the base plate and the heating structure through the first adhesive layer.

[0020] By adopting the above technical solution, the battery cell can be connected and assembled with the heating structure and the base plate simultaneously through the first adhesive layer. The first adhesive layer is provided on the surface of both the base plate and the heating structure, which can improve the coating efficiency of the first adhesive layer and thus improve the assembly efficiency of the battery device.

[0021] In some embodiments, the heating structure includes a first film layer, a second film layer, and a heating portion sandwiched between the first film layer and the second film layer; the first film layer is bonded to the battery cell by a first adhesive layer, the first film layer and the second film layer are connected by a second adhesive layer, and the second film layer is bonded to the base plate by a second adhesive layer.

[0022] By adopting the above technical solution, the first and second film layers are bonded and fixed together with the second film layer and the base plate using the second adhesive layer. This can maintain the consistency between the inside of the heating structure and the side connected to the base plate, reduce the probability of weak points appearing in the heating structure, and thus reduce the probability of damage to the heating structure.

[0023] In some embodiments, a positioning groove is provided on the base plate, and at least a portion of the heating structure is accommodated within the positioning groove.

[0024] By adopting the above technical solution, the positioning groove can be used to position and install the heating structure, thereby improving the installation efficiency of the heating structure and reducing the impact of the thickness of the heating structure on the operation of connecting the battery cell to the base plate.

[0025] In some embodiments, the battery device further includes a first protective member disposed on the first beam and used to separate the heating structure from the inner wall of the first clearance groove.

[0026] By adopting the above technical solution, the heating structure and the inner wall of the first clearance groove are separated by the first protective component. This can effectively reduce the probability of the heating structure coming into contact with the inner wall of the first clearance groove, thereby reducing the probability of burrs on the inner wall of the first clearance groove causing damage to the heating structure.

[0027] In some embodiments, the first protective member is disposed within the first clearance groove, and the first protective member covers at least a portion of the inner wall surface of the first clearance groove.

[0028] By adopting the above technical solution, at least part of the inner wall surface of the first clearance groove is covered by the first protective component, thereby reducing the probability of contact between the heating structure and the inner wall surface of the first clearance groove, and thus reducing the probability of burrs on the inner wall surface of the first clearance groove causing damage to the heating structure.

[0029] In some embodiments, the first protective member includes a first protective part disposed on one side wall of the first beam facing the first receiving cavity, and the first protective part abuts against the bottom plate; a first protective groove is formed on the side of the first protective part facing the bottom plate, and the first protective groove is connected to the first clearance groove; in a direction perpendicular to the length direction of the first beam, the projected area of ​​the first clearance groove is larger than the projected area of ​​the first protective groove, and the projection of the first clearance groove includes the projection of the first protective groove.

[0030] By adopting the above technical solution, when the heating structure passes through the first relief groove from the first receiving cavity and extends into the second receiving cavity, the first protective groove opened on the first protective part can limit the heating structure. The probability of the heating structure contacting the groove opening of the first relief groove facing the first receiving cavity is lower, thus effectively reducing the probability of burrs at the groove opening of the first relief groove causing damage to the heating structure.

[0031] In some embodiments, a first protective portion is disposed on one side wall of the first beam facing the first receiving cavity, and the first protective portion is insulating.

[0032] By adopting the above technical solution, the first protective part can provide insulation protection for the side wall of the first beam facing the first receiving cavity, thereby reducing the probability of short circuit between the first beam and the battery cell; at the same time, when the battery cell is housed in the first receiving cavity and forms a contact force with the first beam, the surface support force of the first protective part on the battery cell is more even, which can effectively reduce the probability of lithium plating in the battery cell.

[0033] In some embodiments, the housing further includes at least one second beam disposed within the first receiving cavity, with its opposite ends connected to a frame and the second beam connected to a base plate; the second beam divides the first receiving cavity into multiple energy compartments, and a second clearance groove is provided on the side of the second beam facing the base plate, the second clearance groove penetrating the multiple energy compartments; battery cell assembly is housed within the multiple energy compartments, and a heating structure passes through the second clearance groove and is disposed within the multiple energy compartments.

[0034] By adopting the above technical solution, at least one second beam can divide the first accommodating cavity into multiple energy chambers for accommodating individual battery cells. At the same time, a heating structure can pass through the second clearance groove opened on the second beam and be arranged in each energy chamber to heat the individual battery cells in each energy chamber.

[0035] In some embodiments, the battery device further includes a second protective member disposed on the second beam and used to separate the inner wall surfaces of the heating structure and the second clearance groove.

[0036] By adopting the above technical solution, the inner wall of the heating structure and the second clearance groove is separated by the second protective component. This can effectively reduce the probability of the heating structure coming into contact with the inner wall of the second clearance groove, thereby reducing the probability of burrs on the inner wall of the second clearance groove causing damage to the heating structure.

[0037] In some embodiments, the second protective member is disposed within the second clearance groove, and the second protective member covers at least a portion of the inner wall surface of the second clearance groove.

[0038] By adopting the above technical solution, at least part of the inner wall surface of the second clearance groove is covered by the second protective component to reduce the probability of contact between the heating structure and the inner wall surface of the second clearance groove, thereby reducing the probability of burrs on the inner wall surface of the second clearance groove causing damage to the heating structure.

[0039] In some embodiments, the second protective member includes a second protective part disposed on a side wall of the second beam facing away from the first beam, and the second protective part abuts against the bottom plate; a second protective groove is formed on the side of the second protective part facing the bottom plate, and the second protective groove is connected to the second clearance groove; in a direction perpendicular to the length direction of the second beam, the projected area of ​​the second clearance groove is larger than the projected area of ​​the second protective groove, and the projection of the second clearance groove includes the projection of the second protective groove.

[0040] By adopting the above technical solution, when the heating structure passes through the second clearance groove, the second protective groove opened on the second protective part can limit the heating structure. The probability of the heating structure contacting the groove opening on the side of the second clearance groove facing away from the first beam is lower. This can effectively reduce the probability of burrs at the groove opening of the second clearance groove causing damage to the heating structure.

[0041] In some embodiments, the second protective portion covers the side wall of the second beam facing away from the first beam, and the second protective portion is insulating.

[0042] By adopting the above technical solution, the second protective part can provide insulation protection for the side wall of the second beam facing away from the first beam, thereby reducing the probability of short circuit between the battery cell and the second beam. At the same time, when the battery cell is housed in the energy chamber and forms a contact force with the second beam, the surface support force of the second protective part on the battery cell is more even, which can effectively reduce the probability of lithium plating in the battery cell.

[0043] In some embodiments, the second protective member further includes a third protective part, which is disposed on the side wall of the second beam facing the first beam and abuts against the bottom plate; a third protective groove is formed on the side of the third protective part facing the bottom plate, and the third protective groove is connected to the second clearance groove; in the direction perpendicular to the length direction of the second beam, the projected area of ​​the second clearance groove is larger than the projected area of ​​the third protective groove, and the projection of the second clearance groove includes the projection of the third protective groove.

[0044] By adopting the above technical solution, when the heating structure passes through the third clearance groove, the third protective groove opened on the third protective part can limit the heating structure, and the probability of the heating structure contacting the groove opening on the side of the third clearance groove facing the first beam is lower. This can effectively reduce the probability of burrs at the groove opening of the third clearance groove causing damage to the heating structure.

[0045] In some embodiments, a third protective portion is disposed on the side wall of the second beam facing the first beam, and the third protective portion is insulating.

[0046] By adopting the above technical solution, the third protective part can provide insulation protection for the side wall of the second beam facing the first beam, thereby reducing the probability of short circuit between the battery cell and the second beam. At the same time, when the battery cell assembly is housed in the energy chamber and forms a contact force with the second beam, the surface support force of the third protective part on the battery cell is more even, which can effectively reduce the probability of lithium plating in the battery cell.

[0047] In some embodiments, the second protective member further includes a fourth protective portion, which covers the side wall of the second beam facing away from the base plate, and the fourth protective portion is insulating.

[0048] By adopting the above technical solution, the fourth protective part can provide insulation protection for the side wall of the second beam facing away from the bottom plate, thereby further improving the insulation protection capability of the second beam.

[0049] In some embodiments, the second protective part, the third protective part, and the fourth protective part are integrally formed.

[0050] By adopting the above-mentioned technical solution, the second protective part, the third protective part and the fourth protective part can be simultaneously assembled onto the second beam to improve assembly efficiency.

[0051] In some embodiments, the enclosure further includes a third beam disposed within the accommodating space, and the third beam, the first beam, the frame, and the bottom plate together enclose a first accommodating cavity; an insulating protective layer is provided on the side wall of the third beam facing the first beam.

[0052] By adopting the above technical solution, an insulating protective layer is applied to the side wall of the third beam facing the first beam, thereby improving the insulation protection capability of the third beam and reducing the probability of short circuit between the battery cell and the third beam.

[0053] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0054] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device. When the probability of damage to the heating structure of the battery device is low, the electrical device has better stability in low temperature environment. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0057] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0058] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0059] Figure 4This is an exploded view of the battery device provided in the embodiments of this application;

[0060] Figure 5 This is a schematic diagram of the structure of the box provided in an embodiment of this application;

[0061] Figure 6 This is a structural schematic diagram of the first beam and a first protective member provided in an embodiment of this application;

[0062] Figure 7 This is a structural schematic diagram of the second beam and a second protective component provided in an embodiment of this application;

[0063] Figure 8 This is an exploded structural diagram of the box provided in an embodiment of this application;

[0064] Figure 9 This is a structural schematic diagram of the second beam and another second protective component provided in an embodiment of this application.

[0065] The following are the labeling elements in the figure:

[0066] 1000, vehicles;

[0067] 100. Battery assembly; 200. Controller; 300. Motor;

[0068] 10. Box body; 10a. Accommodation space; 10a1. First accommodating cavity; 10a2. Second accommodating cavity; 10a3. Energy chamber; 101. Base plate; 101a. Positioning groove; 102. Frame; 103. First beam; 103a. First clearance groove; 104. Second beam; 104a. Second clearance groove; 105. Third beam; 11. First box body; 12. Second box body; 13. Second adhesive layer;

[0069] 20. Battery cell; 210. Battery cell assembly; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0070] 30. Insulating protective layer;

[0071] 40. Heating structure; 41. Groove;

[0072] 50. First protective component; 51. First protective section; 511. First protective groove;

[0073] 60. Second protective component; 61. Second protective section; 611. Second protective groove; 62. Third protective section; 621. Third protective groove; 63. Fourth protective section;

[0074] L represents the length direction of the first beam. Detailed Implementation

[0075] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0076] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0078] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0080] Battery devices involve complex electrochemical reactions during charging and discharging. When the battery device is in a low-temperature environment, the efficiency of these electrochemical reactions is reduced, resulting in lower overall efficiency. Related technologies typically incorporate heating structures inside the battery pack, attached to the side of the battery cell assembly, to heat multiple cells within the assembly. However, when battery cells expand, the gaps between adjacent cells increase, causing the cells to exert tearing forces on the heating structure. This can lead to delamination or cracking of the heating structure, resulting in damage.

[0081] Based on the above considerations, to address the issue of battery cells easily tearing the heating structure during expansion, leading to cracking or delamination, a battery device was designed. This device features a heating structure mounted on the bottom plate of the housing, with the battery cell assembly housed within a first receiving cavity and positioned on the heating structure. Each battery cell in the assembly is also connected to the bottom plate. Thus, when a battery cell expands, the deformation on the side of the assembly connected to the bottom plate is smaller due to the connection between the individual cells and the bottom plate. This reduces the tearing effect of the battery cells on the heating structure, lowering the probability of tearing and ultimately reducing the likelihood of damage to the heating structure. Furthermore, in low-temperature environments, the heating structure can heat the battery cell assembly, ensuring the battery device can operate normally in such conditions.

[0082] The battery cells disclosed in this application can be used in electrical devices that use battery devices as power sources or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, etc.

[0083] 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.

[0084] Please refer to Figure 1 , Figure 1This 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.

[0085] 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.

[0086] 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 mentioned in the embodiments of this application may include one or more battery cell assemblies 210 for providing voltage and capacity. The battery cell assembly 210 may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0087] In some embodiments, the battery cell assembly 210 is typically formed by arranging a plurality of battery cells 20.

[0088] As an example, the battery cell assembly 210 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0089] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 210, the battery cell assemblies 210 being housed in the housing 10.

[0090] As an example, the battery cell assembly 210 can be a battery module, and the battery cell assembly 210 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0091] As an example, the battery cell assembly 210 can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0092] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly 210. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0093] As an example, the housing 10 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 the interior of the housing 10 forms an enclosed space to house the battery cell assembly 210.

[0094] 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.

[0095] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles, etc.

[0096] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0097] The battery cell 20 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.

[0098] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0099] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved reliability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 for outputting or inputting electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0100] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0101] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0102] According to some embodiments of this application, refer to Figure 4 , Figure 5 and Figure 8 This application provides a battery device 100, including a battery cell 20, a power distribution device (not shown in the figure), a housing 10, and a heating structure 40. Multiple battery cells 20 are arranged sequentially to form a battery cell assembly 210, and the power distribution device is electrically connected to the battery cell assembly 210. The housing 10 includes a base plate 101, a frame 102, and a first beam 103. The base plate 101 is connected to one end of the frame 102 and encloses a receiving space 10a. The first beam 103 is disposed within the receiving space 10a, with its opposite ends connected to the frame 102 and the base plate 101. The first beam 103 divides the receiving space 10a into a first receiving cavity 10a1 and a second receiving cavity 10a1. The first receiving cavity 10a2 has a through first clearance groove 103a on the side of the first beam 103 facing the bottom plate 101. The first receiving cavity 10a1 is connected to the second receiving cavity 10a2 through the first clearance groove 103a. The battery cell assembly 210 is housed in the first receiving cavity 10a1 and connected to the bottom plate 101. The power distribution device is housed in the second receiving cavity 10a2. The heating structure 40 is disposed on the bottom plate 101. Part of the heating structure 40 is located in the first receiving cavity 10a1, and the battery cell assembly 210 is disposed on the heating structure 40. The other part of the heating structure 40 passes through the first clearance groove 103a and is located in the second receiving cavity 10a2. The heating structure 40 is electrically connected to the power distribution device.

[0103] Multiple battery cells 20 are arranged sequentially to form a battery cell assembly 210. Optionally, the multiple battery cells 20 can be arranged in any direction to form the battery cell assembly 210, for example, along the length direction of the first beam 103, or along directions intersecting the length direction of the first beam 103. The multiple battery cells 20 can be arranged to form one set of battery cell assemblies 210, or the multiple battery cells 20 can be arranged to form two or more sets of battery cell assemblies 210.

[0104] A power distribution device is used to control the operation of high-voltage circuits in electrical devices. Here, "voltage" in high-voltage circuit refers to a circuit with a voltage exceeding 60V. For example, a power distribution device can be a high-voltage distribution box, which can be used to manage the power distribution of high-voltage circuits in electrical devices. For instance, a PDU (Power Distribution Unit) used in new energy vehicles is responsible for power distribution and management in the high-voltage circuits of new energy vehicles, providing functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage circuits. A high-voltage distribution box can also refer to a component used in a battery device 100 to control battery charging and discharging, such as a BDU (Battery Disconnect Unit). A BDU is a high-voltage distribution box specifically designed for batteries, controlling their charging and discharging.

[0105] The power distribution device is electrically connected to the battery cell assembly 210 and the heating structure 40; thus, power distribution and management of the battery cell assembly 210 and power supply to the heating structure 40 can be realized.

[0106] The enclosure 10 includes a frame 102; the frame 102 can be a frame structure formed by connecting multiple beams end to end in sequence, such as, but not limited to, a triangular frame, a rectangular frame, or other polygonal frames. Thus, the connection between the base plate 101 and one end of the frame 102 can enclose and form an accommodating space 10a. Optionally, the base plate 101 and the frame 102 can be fixedly connected by fasteners (such as bolts, rivet nuts, etc.), welding, or other methods.

[0107] The first beam 103 is disposed within the accommodating space 10a; optionally, the first beam 103 may be, but is not limited to, a profile beam, a roll-formed beam, etc.

[0108] The two opposite ends of the first beam 103 are connected to the frame 102; that is, the two ends of the first beam 103 along its own length direction are fixedly connected to the frame 102. For example, the two opposite ends of the first beam 103 can be connected by welding, bracket connection, connector connection, etc.

[0109] The first beam 103 is connected to the base plate 101; optionally, the first beam 103 can be fixedly connected to the base plate 101 by means of fastener connection, welding, bonding, etc. By connecting the first beam 103 to the frame 102 and the base plate 101 respectively, the accommodating space 10a can be divided to form a first accommodating cavity 10a1 and a second accommodating cavity 10a2.

[0110] The first beam 103 can be arranged in any direction within the accommodating space 10a, such as along the length direction, width direction, or any direction intersecting the length or width direction of the frame 102. For example, in some embodiments, the first beam 103 can be arranged along the width direction of the frame 102, such that the accommodating space 10a is divided along the length direction of the frame 102 to form a first accommodating cavity 10a1 and a second accommodating cavity 10a2.

[0111] The first receiving cavity 10a1 can be used to house the battery cell assembly 210, and the battery cells 20 in the battery cell assembly 210 can be connected to the base plate 101, for example, by adhesive bonding. The second receiving cavity 10a2 can be used to house the power distribution device, so as to achieve separate housing for the battery cell assembly 210 and the power distribution device.

[0112] The first beam 103 has a first clearance groove 103a on the side facing the base plate 101. Thus, when the first beam 103 is connected to the base plate 101, the base plate 101 will surround the first clearance groove 103a, forming a clearance space. When the heating structure 40 is installed on the base plate 101, the heating structure 40 can pass through this clearance space and be simultaneously installed in the first receiving cavity 10a1 and the second receiving cavity 10a2. Thus, the heating structure 40 can be electrically connected to the power distribution device within the second receiving cavity 10a2, and can heat the battery cells 20 in the battery cell assembly 210 within the first receiving cavity 10a1.

[0113] Optionally, the number of first clearance grooves 103a formed on the first beam 103 can be one or more; when there are multiple first clearance grooves 103a, the multiple first clearance grooves 103a can be arranged sequentially at intervals along the length direction of the first beam 103. For example, the number of first clearance grooves 103a can be the same as the number of heating structures 40, so that each heating structure 40 can be arranged through the corresponding first clearance groove 103a.

[0114] Here, heating structure 40 refers to a structure capable of being energized and performing a heating function. Optionally, heating structure 40 may be, but is not limited to, a heating wire, a heating resistor, etc. Exemplarily, in some embodiments, heating structure 40 may include a heating wire and a heating film. The heating wire is disposed within the heating film and is electrically connected to a power distribution device. The heating film is disposed on the base plate 101 and located below the battery cell assembly 210. By supplying power to the heating wire to make the heating wire heat up, the heating film can heat the battery cell 20.

[0115] The heating structure 40 is disposed on the base plate 101; optionally, the heating structure 40 can be connected to the base plate 101 by means of adhesive, snap-fit, etc. For example, in some embodiments, the heating structure 40 can be glued and fixed to the base plate 101 by double-sided adhesive.

[0116] The heating structure 40 can be of any configuration; for example, the heating structure 40 can be a strip structure distributed in a straight line, passing through the first clearance groove 103a and intersecting with the first beam 103, for example, distributed perpendicularly to the first beam 103. Alternatively, the heating structure 40 can be an arc-shaped structure, a wavy line structure, a multi-segment line structure, etc.; the configuration of the heating structure 40 can be arbitrarily set, as long as the heating structure 40 can make contact with each battery cell 20 in the battery cell assembly 210 to be heated.

[0117] The battery cell assembly 210 is disposed on the heating structure 40. Optionally, the battery cells 20 in the battery cell assembly 210 can be pressed onto the heating structure 40 by their own gravity; or, the battery cells 20 can be fixed to the heating structure 40 by adhesive bonding. Simultaneously, the portion of the battery cell 20 outside the heating structure 40 is also connected to the base plate 101 to enhance the connection strength between the battery cell 20 and the base plate 101. It should be understood that if the battery cell 20 in the battery cell assembly 210 expands, it will be restricted from moving due to its connection to the base plate 101. Therefore, by disposing of the heating structure 40 on the side where the battery cell 20 connects to the base plate 101, the impact of the battery cell 20's expansion on the heating structure 40 is minimized.

[0118] The battery device 100 provided in this application embodiment has a heating structure 40 that can be arranged on a base plate 101 and pass through a first clearance groove 103a. In this way, the power distribution device can supply power to the heating structure 40 and enable the heating structure 40 to heat the battery device 100. At the same time, the battery cell assembly 210 is connected to the base plate 101. When the battery cell 20 in the battery cell assembly 210 expands, the deformation of the side of the battery cell 20 connected to the base plate 101 is smaller. As a result, the tearing effect of the battery cell 20 on the heating structure 40 is lower, the probability of the heating structure 40 tearing is lower, and thus the probability of the heating structure 40 being damaged can be reduced.

[0119] Please refer to Figure 4 , Figure 5 and Figure 8In some embodiments, at least two first clearance grooves 103a are sequentially spaced along the length direction L of the first beam 103 facing the bottom plate 101; the number of heating structures 40 is at least two, and the multiple heating structures 40 are sequentially spaced along the length direction L of the first beam 103 and are respectively provided with corresponding first clearance grooves 103a.

[0120] In this embodiment, at least two first clearance grooves 103a may be provided on the first beam 103, for example, two, three or more of them.

[0121] The number of heating structures 40 is at least two, for example, two, three or more. In some embodiments, the number of heating structures 40 may be the same as the number of first clearance grooves 103a; thus, each heating structure 40 can pass through the corresponding first clearance groove 103a and be distributed in the first receiving cavity 10a1 and the second receiving cavity 10a2.

[0122] Optionally, a group of battery cell assemblies 210 can be heated using one heating structure 40, meaning a heating structure 40 can be provided between the battery cell assembly 210 and the base plate 101; alternatively, multiple heating structures 40 can be used to heat a group of battery cell assemblies 210. For example, when two heating structures 40 are used to heat a group of battery cell assemblies 210, the battery cell assembly 210 is disposed on the base plate 101 within the first receiving cavity 10a1, and the group of battery cell assemblies 210 is pressed against the two heating structures 40.

[0123] With this configuration, multiple heating structures 40 can be sequentially spaced along the length L of the first beam 103. Each of the multiple heating structures 40 can pass through a corresponding first clearance groove 103a to achieve power supply and heating operation.

[0124] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, multiple battery cells 20 are arranged along the length direction L perpendicular to the first beam 103 to form at least two sets of battery cell assemblies 210; multiple sets of battery cell assemblies 210 are arranged sequentially along the length direction L of the first beam 103; heating structures 40 are arranged along the length direction L perpendicular to the first beam 103, and each set of battery cell assemblies 210 is provided with at least one heating structure 40 on the side facing the base plate 101.

[0125] In this embodiment, the number of battery cell assemblies 210 can be any number of groups, including two, three, or more. Multiple groups of battery cell assemblies 210 can be arranged sequentially along the length direction L of the first beam 103; it should be understood that multiple groups of battery cell assemblies 210 can be arranged in a single column along the length direction L of the first beam 103; or, multiple groups of battery cell assemblies 210 can be arranged in two, three, or more columns along the length direction L of the first beam 103.

[0126] The heating structure 40 is arranged along the length direction L perpendicular to the first beam 103. At the same time, multiple battery cells 20 are arranged along the length direction L perpendicular to the first beam 103 to form a battery cell assembly 210. In this way, the heating structure 40 can pass through the bottom of the battery cell assembly 210 and make contact with each battery cell 20 in the battery cell assembly 210, and the heating effect of the heating structure 40 on the battery cell assembly 210 is better.

[0127] Optionally, the heating structure 40 can be a strip structure, including but not limited to a straight strip structure, a wavy strip structure, a multi-segment strip structure, etc.

[0128] Each group of battery cell assembly 210 is provided with at least one heating structure 40 on the side facing the base plate 101; optionally, each group of battery cell assembly 210 can be heated by one heating structure 40, that is, one heating structure 40 is provided between the battery cell assembly 210 and the base plate 101; or, each group of battery cell assembly 210 can be heated by two or more heating structures 40, that is, two or more heating structures 40 are provided between the battery cell assembly 210 and the base plate 101.

[0129] With this configuration, each battery cell assembly 210 can be heated by at least one heating structure 40, which can effectively ensure the operating temperature of each battery cell assembly 210 and improve the reliability of the battery device 100.

[0130] Please refer to Figure 4 and Figure 5 In some embodiments, a groove 41 is formed on the heating structure 40 within the first receiving cavity 10a1.

[0131] Optionally, the groove 41 can be formed at the outer edge of the heating structure 40, for example, at the outer edge of any side of the heating structure 40; or, the groove 41 can be formed on the inner side of the heating structure 40, for example, by opening a through slot structure in the heating structure 40, so that the base plate 101 is exposed at the slot structure.

[0132] The number of grooves 41 can be one, two, or more than two.

[0133] With this configuration, by opening a groove 41 on the heating structure 40, the area of ​​the base plate 101 exposed outside the heating structure 40 is larger, thereby increasing the connection area between the battery cell 20 in the battery cell assembly 210 and the base plate 101. This can increase the connection area between the battery cell 20 and the base plate 101, thereby improving the overall structural strength of the battery cell assembly 210 and the housing 10.

[0134] Please refer to Figure 4 and Figure 5 In some embodiments, at least one side of the heating structure 40 located in the first receiving cavity 10a1 is recessed inward to form a groove 41 along the length direction L of the first beam 103.

[0135] Optionally, a groove 41 may be formed on one side of the heating structure 40 along the length direction L of the first beam 103, or grooves 41 may be formed on both opposite sides of the heating structure 40.

[0136] It should be understood that when the heating structure 40 located in the first receiving cavity 10a1 is recessed inward to form a groove 41, the area of ​​the base plate 101 exposed to the heating structure 40 will increase. In this way, the connection area between the battery cell 20 and the base plate 101 is also increased; the connection strength between the battery cell assembly 210 and the base plate 101 is effectively improved.

[0137] The heating structure 40 may have one, two, three or more grooves 41; the grooves 41 may be, but are not limited to, strip grooves, circular grooves, rectangular grooves, arc grooves, etc. The grooves 41 may be formed at any location on the heating structure 40.

[0138] With this configuration, the heating structure 40 has a smaller dimension along the length direction L of the first beam 103, resulting in a larger dimension of the base plate 101 exposed outside the heating structure 40. This increases the connection area between the battery cell 20 and the base plate 101, thereby improving the overall structural strength of the battery cell assembly 210 and the housing 10.

[0139] Please refer to Figure 4 and Figure 5 In some embodiments, at least a portion of the groove 41 is located in the middle of the first receiving cavity 10a1 in a direction perpendicular to the length direction L of the first beam 103.

[0140] It should be understood that at least a portion of the groove 41 is located at the center of the first receiving cavity 10a1 in a direction perpendicular to the length direction L of the first beam 103; thus, in the direction perpendicular to the length direction L of the first beam 103, the exposed area of ​​the bottom plate 101 at the center of the first receiving cavity 10a1 is larger, and the connection area formed between the bottom plate 101 and the battery cell 20 at the center of the first receiving cavity 10a1 is larger.

[0141] With this configuration, in the direction perpendicular to the length L of the first beam 103, by forming a larger connection area between the base plate 101 and the battery cell 20 in the middle of the first receiving cavity 10a1, the connection stability between the battery cell 20 and the base plate 101 in the middle of the first receiving cavity 10a1 is better. When the battery device 100 is mounted and used, under vibration conditions, the connection stability between the battery cell 20 and the base plate 101 and the entire housing 10 is better, thereby effectively improving the structural stability of the battery device 100 when mounted and used.

[0142] Please refer to Figure 4 and Figure 5 In some embodiments, a first adhesive layer (not shown in the figure) is provided on the portion of the base plate 101 exposed to the heating structure 40 and the surface of the heating structure 40 within the first receiving cavity 10a1. The battery cell 20 is bonded to the base plate 101 and the heating structure 40 through the first adhesive layer.

[0143] Optionally, the first adhesive layer can be a structural adhesive, such as epoxy resin structural adhesive, polyurethane structural adhesive, acrylic structural adhesive, silicone structural adhesive, etc.

[0144] The first adhesive layer can be disposed on the surface of the base plate 101 exposed on the heating structure 40; in this way, the battery cell 20 can be fixedly connected to the base plate 101 through the first adhesive layer.

[0145] Meanwhile, the first adhesive layer can also be disposed on the heating structure 40; thus, when the battery cell 20 is pressed onto the heating structure 40, the battery cell 20 and the heating structure 40 can also be fixed together by the first adhesive layer.

[0146] It should be understood that, since the first adhesive layer is simultaneously provided on both the portion of the base plate 101 exposed to the heating structure 40 and the surface of the heating structure 40, the adhesive layer can be directly applied to one side of the base plate 101 inside the first receiving cavity 10a1 during the adhesive application process; the first adhesive layer can be applied simultaneously to the surface of the base plate 101 and the surface of the heating structure 40.

[0147] With this configuration, the battery cell 20 can be connected and assembled with the heating structure 40 and the base plate 101 simultaneously through the first adhesive layer, and the first adhesive layer can be simultaneously applied to the surfaces of the base plate 101 and the heating structure 40, which can improve the coating efficiency of the first adhesive layer and thus improve the assembly efficiency of the battery device 100.

[0148] Please refer to Figure 4 and Figure 5In some embodiments, the heating structure 40 includes a first film layer, a second film layer, and a heating part sandwiched between the first film layer and the second film layer (the specific structural diagrams of the first film layer, the second film layer, and the heating part are not shown). The first film layer is bonded to the battery cell 20 through a first adhesive layer, the first film layer and the second film layer are connected through a second adhesive layer 13, and the second film layer is bonded to the base plate 101 through the second adhesive layer 13.

[0149] The heating element refers to components such as heating wires and heating resistors that can generate heat when electricity is applied.

[0150] The first and second films are typically made of thin-film materials, possessing a certain degree of flexibility and good thermal conductivity. The surfaces of the first and second films generally have a large contact area, enabling the uniform distribution of heat to the area requiring heating during the heating process, thereby improving the heating effect on the battery cell 20. Simultaneously, the first and second films also protect the heating element, preventing it from being directly exposed to the external environment, thus extending the service life of the heating element.

[0151] The first and second film layers are connected by a second adhesive layer 13, thereby sandwiching the heating element between the first and second film layers. The second adhesive layer 13 can be, but is not limited to, double-sided tape, foam adhesive, etc.

[0152] Meanwhile, the second film layer is bonded to the base plate 101 by the second adhesive layer 13; thus, the adhesion between the second film layer and the base plate 101 and the adhesion between the first film layer and the second film layer remain the same.

[0153] With this configuration, the first and second film layers are bonded and fixed together with the second film layer and the base plate 101 using the second adhesive layer 13. This maintains the consistency between the interior of the heating structure 40 and the side connected to the base plate 101, reducing the probability of weak points appearing on the heating structure 40. Even if the battery cell is displaced relative to the base plate 101, the first and second film layers can move synchronously and detach from the base plate 101 without damage, thus effectively reducing the probability of damage to the heating structure 40.

[0154] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, a positioning groove 101a is provided on the base plate 101, and at least a portion of the heating structure 40 is accommodated in the positioning groove 101a.

[0155] The positioning groove 101a is used for positioning and accommodating the heating structure 40 to improve the assembly efficiency of the heating structure 40. It should be understood that the positioning groove 101a is arranged through the first receiving cavity 10a1 and the second receiving cavity 10a2 to be consistent with the arrangement position of the heating structure 40.

[0156] The heating structure 40 can be completely contained within the positioning groove 101a, meaning that the heating structure 40 does not exceed the range of the positioning groove 101a along the thickness direction of the base plate 101; or, the heating structure 40 can be partially contained within the positioning groove 101a, with another part exceeding the range of the positioning groove 101a and extending to the outside.

[0157] Optionally, the number of positioning slots 101a can be one or more; for example, the specific number of positioning slots 101a can be the same as the number of heating structures 40, so that each heating structure 40 is respectively housed in the corresponding positioning slot 101a.

[0158] For example, in some embodiments, there are multiple heating structures 40, which are distributed sequentially at intervals along the length direction L of the first beam 103; multiple positioning grooves 101a are provided on the base plate 101, the number of positioning grooves 101a is the same as the number of heating structures 40, and the multiple positioning grooves 101a are distributed sequentially at intervals along the length direction L of the first beam 103; in this way, each heating structure 40 can be accommodated in the corresponding positioning groove 101a to achieve rapid positioning and assembly.

[0159] With this configuration, the positioning groove 101a can be used to position and install the heating structure 40, thereby improving the installation efficiency of the heating structure 40 and reducing the impact of the thickness of the heating structure 40 on the operation of connecting the battery cell 20 to the base plate 101.

[0160] Please refer to Figures 4 to 8 In some embodiments, the battery device 100 further includes a first protective member 50, which is disposed on the first beam 103 and serves to separate the heating structure 40 and the inner wall of the first clearance groove 103a.

[0161] The first protective member 50 is disposed on the first beam 103; optionally, the first protective member 50 may be disposed in the first relief groove 103a, for example, to block or cover the inner wall of the first relief groove 103a; or, the first protective member 50 may also be disposed on the surface of the first beam 103 and to restrict the groove opening of the first relief groove 103a.

[0162] The first protective component 50 is used to separate the inner wall of the heating structure 40 and the first clearance groove 103a; thus, during the assembly of the heating structure 40, the probability of the heating structure 40 coming into contact with the inner wall of the first clearance groove 103a is lower.

[0163] Optionally, the first protective component 50 may include, but is not limited to, a protective plate, a protective block, a protective cover, a protective net, a protective bracket, etc. The material of the first protective component 50 may generally be plastic, injection molded material, etc.; in this way, the first protective component 50 will not form burrs, and by using the first protective component 50 to separate the inner wall surface of the first clearance groove 103a and form contact with the heating structure 40, the probability of the heating structure 40 being damaged is effectively reduced.

[0164] It should be understood that when the first beam 103 is processed to form the first clearance groove 103a, burrs will be formed on the inner wall surface of the first clearance groove 103a. When the heating structure 40 comes into contact with the inner wall surface of the first clearance groove 103a, the heating structure 40 is easily punctured and scratched by the burrs, resulting in damage to the heating structure 40.

[0165] With this configuration, the heating structure 40 and the inner wall of the first clearance groove 103a are separated by the first protective member 50. This can effectively reduce the probability of the heating structure 40 coming into contact with the inner wall of the first clearance groove 103a, thereby reducing the probability of burrs on the inner wall of the first clearance groove 103a causing damage to the heating structure 40.

[0166] It should be understood that, in other embodiments, the inner wall surface and the opening end of the first clearance groove 103a may also be polished to reduce the formation of burrs.

[0167] Please refer to Figures 4 to 6 In some embodiments, the first protective member 50 is disposed within the first clearance groove 103a, and the first protective member 50 covers at least a portion of the inner wall surface of the first clearance groove 103a.

[0168] In this embodiment, the first protective member 50 is disposed within the first clearance groove 103a; thus, during the assembly process where the heating structure 40 passes through the first clearance groove 103a, the probability of the heating structure 40 coming into contact with the inner wall of the first clearance groove 103a is lower. Furthermore, since the first protective member 50 is filled within the first clearance groove 103a, it limits the movement range of the heating structure 40 within the first clearance groove 103a; thus, the probability of the heating structure 40 coming into contact with the opening end of the first clearance groove 103a is also lower.

[0169] Optionally, the first protective component 50 may be, but is not limited to, a protective cover, a protective block, etc.; taking the first protective component 50 as a protective cover as an example, the protective cover may be installed on the inner wall surface of the first clearance groove 103a, and the protective cover may cover the opening end of the first clearance groove 103a. In this way, the probability of the heating structure 40 contacting the inner wall surface of the first clearance groove 103a is smaller.

[0170] With this configuration, the first protective component 50 covers at least part of the inner wall of the first clearance groove 103a, thereby reducing the probability of contact between the heating structure 40 and the inner wall of the first clearance groove 103a, and thus reducing the probability of burrs on the inner wall of the first clearance groove 103a causing damage to the heating structure 40.

[0171] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the first protective member 50 includes a first protective part 51, which is disposed on the side wall of the first beam 103 facing the first receiving cavity 10a1 and abuts against the bottom plate 101. A first protective groove 511 is formed on the side of the first protective part 51 facing the bottom plate 101 and is connected to the first clearance groove 103a. In the direction perpendicular to the length direction L of the first beam 103, the projected area of ​​the first clearance groove 103a is larger than the projected area of ​​the first protective groove 511, and the projection of the first clearance groove 103a includes the projection of the first protective groove 511.

[0172] The first protective part 51 is disposed on the side wall of the first beam 103 facing the first receiving cavity 10a1; optionally, the first protective part 51 can be a plate structure or a sheet structure, and the first protective part 51 can be fixed to the surface of the first beam 103 by means of bonding, snap-fit ​​connection, fastener connection, etc.

[0173] It should be understood that during assembly, the heating structure 40 generally extends from the first receiving cavity 10a1 through the first relief groove 103a and into the second receiving cavity 10a2; thus, the heating structure 40 more easily makes contact with the groove end of the first relief groove 103a and the side of the first beam 103 facing the first receiving cavity 10a1. Therefore, by providing the first protective part 51 on the wall of the first beam 103 facing the first receiving cavity 10a1, the heating structure 40 can be effectively protected.

[0174] The first protective part 51 may be provided only on the side wall of the first beam 103 facing the first receiving cavity 10a1 and located on the periphery of the first clearance groove 103a; or the first protective part 51 may cover the entire side wall of the first beam 103 facing the first receiving cavity 10a1.

[0175] The first protective part 51 has a first protective groove 511 on the side facing the base plate 101, and the first protective part 51 abuts against the base plate 101; thus, the base plate 101 surrounds the first protective groove 511 and forms a through space. The first protective groove 511 is connected to the first clearance groove 103a; thus, the heating structure 40 can be arranged by passing through the first protective groove 511 and the first clearance groove 103a in sequence.

[0176] In the direction perpendicular to the length L of the first beam 103, the projected area of ​​the first clearance groove 103a is larger than the projected area of ​​the first protective groove 511, and the projection of the first clearance groove 103a includes the projection of the first protective groove 511; thus, the volume of the first protective groove 511 is smaller than the volume of the first clearance groove 103a. When the heating structure 40 passes through the first protective groove 511 and the first clearance groove 103a, the probability of the heating structure 40 contacting the inner wall of the first clearance groove 103a is smaller due to the limiting effect of the inner wall of the first protective groove 511; thus, the probability of the heating structure 40 being punctured by burrs can be effectively reduced.

[0177] For example, in some embodiments, the first clearance groove 103a can be a semi-circular groove, and the first protective groove 511 is also a semi-circular groove; wherein, the volume of the first protective groove 511 is smaller than that of the first clearance groove 103a, and the first beam 103 and the first protective part 51 both abut against the bottom plate 101, so that the groove opening end of the first clearance groove 103a is aligned with the groove opening end of the first protective groove 511; thus, the inner wall surface of the first protective groove 511 is closer to the bottom plate 101 than the inner wall surface of the first clearance groove 103a; when the heating structure 40 is assembled from the first receiving cavity 10a1 into the second receiving cavity 10a2, the probability of the heating structure 40 contacting the inner wall surface of the first clearance groove 103a is lower, thus effectively protecting the heating structure 40.

[0178] With this configuration, when the heating structure 40 passes through the first relief groove 103a from the first receiving cavity 10a1 and extends into the second receiving cavity 10a2, the first protective groove 511 on the first protective part 51 can limit the heating structure 40. The probability of the heating structure 40 contacting the groove opening of the first relief groove 103a facing the first receiving cavity 10a1 is lower. This can effectively reduce the probability of burrs at the groove opening of the first relief groove 103a causing damage to the heating structure 40.

[0179] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, a first protective part 51 is provided on the side wall of the first beam 103 facing the first receiving cavity 10a1, and the first protective part 51 is insulating.

[0180] In this embodiment, the first protective part 51 can cover the entire wall surface of the first beam 103 facing the first receiving cavity 10a1. Thus, when the battery cell 20 is housed within the receiving cavity and in close contact with the first beam 103, the first protective part 51 can provide support for the battery cell 20. Furthermore, since the first protective part 51 can fully cover the side surface of the first beam 103, it effectively prevents uneven stress on the battery cell 20 caused by partial contact between the first protective part 51 and the battery cell 20 when the first protective part 51 covers part of the first beam 103, thus avoiding lithium plating.

[0181] The first protective part 51 is insulating; optionally, the first protective part 51 can be made of materials with good insulation properties such as plastic or injection-molded structure. The first protective part 51 is used to provide insulation protection for the first beam 103, reducing the probability of short circuit between the battery cell 20 and the first beam 103.

[0182] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the housing 10 further includes at least one second beam 104, which is disposed within the first receiving cavity 10a1. The two opposite ends of the second beam 104 are connected to the frame 102 and the second beam 104 is connected to the bottom plate 101. The second beam 104 divides the first receiving cavity 10a1 into multiple energy chambers 10a3. A second clearance groove 104a is provided on the side of the second beam 104 facing the bottom plate 101, and the second clearance groove 104a passes through the multiple energy chambers 10a3. The battery cell assembly 210 is housed within the multiple energy chambers 10a3, and the heating structure 40 passes through the second clearance groove 104a and is arranged within the multiple energy chambers 10a3.

[0183] The second beam 104 may be, but is not limited to, a profile beam, a roll-formed beam, etc. The number of the second beam 104 may be one, two, or more than two; one or more second beams 104 are disposed in the first receiving cavity 10a1 and divide the first receiving cavity 10a1 into multiple energy chambers 10a3, and multiple energy chambers 10a3 are used to respectively accommodate multiple sets of battery cell modules 210.

[0184] The second beam 104 can be arranged in any direction, for example, it can be arranged in a direction parallel to the first beam 103, or in any direction intersecting the first beam 103. Exemplarily, in some embodiments, taking one second beam 104 as an example, the second beam 104 can be arranged parallel to the first beam 103 and spaced apart from the first beam 103, such that the first receiving cavity 10a1 is divided into two energy chambers 10a3.

[0185] The second beam 104 has a second clearance groove 104a on the side facing the base plate 101; optionally, the second clearance groove 104a may be, but is not limited to, a semi-circular groove, a rectangular groove, etc. The number of second clearance grooves 104a may be one or more; in some embodiments, the number of second clearance grooves 104a may be the same as the number of heating structures 40.

[0186] For example, when the first beam 103 and the second beam 104 are arranged in parallel, if the heating structure 40 is a straight strip structure arranged in a direction perpendicular to the length direction L of the first beam 103, the first clearance groove 103a and the second clearance groove 104a are directly opposite each other in a direction perpendicular to the length direction L of the first beam 103; in this way, the heating structure 40 can be simultaneously inserted through the first clearance groove 103a and the second clearance groove 104a and arranged in multiple energy chambers 10a3 and the second receiving cavity 10a2.

[0187] With this configuration, at least one second beam 104 can divide the first receiving cavity 10a1 into multiple energy chambers 10a3, which are used to house the battery cell assembly 210 respectively. At the same time, the heating structure 40 can pass through the second clearance groove 104a opened on the second beam 104 and be arranged in each energy chamber 10a3 to heat the battery cell assembly 210 in each energy chamber 10a3.

[0188] Please refer to Figure 4 , Figure 5 , Figure 7 and Figure 8 In some embodiments, the battery device 100 further includes a second protective member 60, which is disposed on the second beam 104 and serves to separate the inner wall surfaces of the heating structure 40 and the second clearance groove 104a.

[0189] The second protective member 60 is disposed on the second beam 104; optionally, the second protective member 60 may be disposed in the second relief groove 104a, for example, to shield or cover the inner wall of the second relief groove 104a; or, the second protective member 60 may also be disposed on the surface of the second beam 104 and to restrict the groove opening end of the second relief groove 104a.

[0190] The second protective component 60 is used to separate the inner wall surfaces of the heating structure 40 and the second clearance groove 104a; thus, during the assembly of the heating structure 40, the probability of the heating structure 40 coming into contact with the inner wall surface of the second clearance groove 104a is lower.

[0191] Optionally, the second protective component 60 may include, but is not limited to, a protective plate, a protective block, a protective cover, a protective net, a protective bracket, etc. The material of the second protective component 60 can generally be plastic, injection molded material, etc.; in this way, the second protective component 60 will not form burrs, and by using the second protective component 60 to separate the inner wall surface of the second clearance groove 104a and form contact with the heating structure 40, the probability of the heating structure 40 being damaged is effectively reduced.

[0192] It should be understood that when the second beam 104 is processed to form the second clearance groove 104a, burrs will be formed on the groove structure of the second clearance groove 104a; when the heating structure 40 comes into contact with the inner wall of the second clearance groove 104a, the heating structure 40 is easily punctured and scratched by the burrs, resulting in damage to the heating structure 40.

[0193] With this configuration, the heating structure 40 and the inner wall of the second clearance groove 104a are separated by the second protective member 60. This can effectively reduce the probability of the heating structure 40 contacting the inner wall of the second clearance groove 104a, thereby reducing the probability of burrs on the inner wall of the second clearance groove 104a causing damage to the heating structure 40.

[0194] Please refer to Figure 4 , Figure 5 and Figure 7 In some embodiments, the second protective member 60 is disposed within the second clearance groove 104a, and the second protective member 60 covers at least a portion of the inner wall surface of the second clearance groove 104a.

[0195] In this embodiment, the second protective member 60 is disposed within the second clearance groove 104a; thus, during the assembly process where the heating structure 40 passes through the second clearance groove 104a, the probability of the heating structure 40 coming into contact with the inner wall of the second clearance groove 104a is lower. Furthermore, since the second protective member 60 is filled within the second clearance groove 104a, it limits the movement range of the heating structure 40 within the second clearance groove 104a; thus, the probability of the heating structure 40 coming into contact with the opening end of the second clearance groove 104a is also lower.

[0196] Optionally, the second protective component 60 may be, but is not limited to, a protective cover, a protective block, etc.; taking the second protective component 60 as a protective cover as an example, the protective cover may be installed on the inner wall surface of the second clearance groove 104a, and the protective cover may cover the opening end of the second clearance groove 104a. In this way, the probability of the heating structure 40 contacting the inner wall surface of the second clearance groove 104a is smaller.

[0197] With this configuration, the second protective member 60 covers at least part of the inner wall of the second clearance groove 104a, thereby reducing the probability of contact between the heating structure 40 and the inner wall of the second clearance groove 104a, and thus reducing the probability of burrs on the inner wall of the second clearance groove 104a causing damage to the heating structure 40.

[0198] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the second protective member 60 includes a second protective part 61, which is disposed on the side wall of the second beam 104 facing away from the first beam 103 and abuts against the bottom plate 101. A second protective groove 611 is formed on the side of the second protective part 61 facing the bottom plate 101 and is connected to the second clearance groove 104a. In the direction perpendicular to the length direction of the second beam 104, the projected area of ​​the second clearance groove 104a is larger than the projected area of ​​the second protective groove 611, and the projection of the second clearance groove 104a includes the projection of the second protective groove 611.

[0199] The second protective part 61 is disposed on the side wall of the second beam 104 facing away from the first beam 103; optionally, the second protective part 61 can be a plate structure or a sheet structure, and the second protective part 61 can be fixed to the surface of the second beam 104 by means of bonding, snap-fit ​​connection, fastener connection or other methods.

[0200] It should be understood that during assembly, the heating structure 40 generally passes through the second clearance groove 104a and the first clearance groove 103a from an energy chamber 10a3 located away from the second receiving cavity 10a2, and is arranged in other energy chambers 10a3 and the second receiving cavity 10a2. In this way, the heating structure 40 can more easily make contact with the groove end of the second clearance groove 104a and the side of the second beam 104 facing away from the first beam 103. Thus, by providing a second protective part 61 on the wall of the second beam 104 facing away from the first beam 103, the heating structure 40 can be effectively protected.

[0201] The second protective part 61 may be provided only on the side wall of the second beam 104 facing away from the first beam 103 and located on the periphery of the second clearance groove 104a; or the second protective part 61 may cover the entire side wall of the second beam 104 facing away from the first beam 103.

[0202] The second protective part 61 has a second protective groove 611 on the side facing the base plate 101, and the second protective part 61 abuts against the base plate 101; thus, the base plate 101 surrounds the second protective groove 611 and forms a through space. The second protective groove 611 connects to two adjacent energy chambers 10a3; thus, the heating structure 40 can be arranged by passing through the second protective groove 611 and the second clearance groove 104a in sequence.

[0203] In the direction perpendicular to the length L of the first beam 103, the projected area of ​​the second clearance groove 104a is larger than the projected area of ​​the second protective groove 611, and the projection of the second clearance groove 104a includes the projection of the second protective groove 611; thus, the volume of the second protective groove 611 is smaller than the volume of the second clearance groove 104a. When the heating structure 40 passes through the second protective groove 611 and the second clearance groove 104a, the probability of the heating structure 40 contacting the inner wall of the second clearance groove 104a is lower due to the limiting effect of the groove structure of the second protective groove 611; thus, the probability of the heating structure 40 being punctured by burrs can be effectively reduced.

[0204] For example, in some embodiments, the second clearance groove 104a can be a semi-circular groove, and the second protective groove 611 is also a semi-circular groove; wherein, the volume of the second protective groove 611 is smaller than that of the second clearance groove 104a, and the second beam 104 and the second protective part 61 both abut against the bottom plate 101, so that the groove opening end of the second clearance groove 104a is aligned with the groove opening end of the second protective groove 611; thus, the inner wall surface of the second protective groove 611 is closer to the bottom plate 101 than the inner wall surface of the second clearance groove 104a; when the heating structure 40 is assembled by passing through the second clearance groove 104a, the probability of the heating structure 40 contacting the inner wall surface of the second clearance groove 104a is lower, thus effectively protecting the heating structure 40.

[0205] With this configuration, when the heating structure 40 is installed from one energy chamber 10a3, which is far from the second receiving chamber 10a2, into another receiving chamber, which is close to the second receiving chamber 10a2, the second protective groove 611 on the second protective part 61 can limit the heating structure 40. The probability of the heating structure 40 coming into contact with the groove on the side of the second clearance facing away from the first beam 103 is lower. This can effectively reduce the probability of burrs at the groove opening of the second clearance groove 104a causing damage to the heating structure 40.

[0206] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the second protective part 61 is covered on the side wall of the second beam 104 facing away from the first beam 103, and the second protective part 61 is insulating.

[0207] In this embodiment, the second protective part 61 can cover the entire wall surface of the side of the second beam 104 facing away from the first beam 103. Thus, when the battery cell 20 is housed within the corresponding energy chamber 10a3 and forms close contact with the second beam 104, the second protective part 61 can provide support for the battery cell 20. Furthermore, since the second protective part 61 can fully cover the side surface of the second beam 104, it avoids uneven stress on the battery cell 20 caused by partial contact between the second protective part 61 and the battery cell 20 when the second protective part 61 covers part of the second beam 104, thus preventing lithium plating.

[0208] The second protective part 61 is insulating; optionally, the second protective part 61 can be made of materials with good insulation properties, such as plastic or injection-molded structure. The second protective part 61 provides insulation protection for the second beam 104, reducing the probability of short circuit between the battery cell 20 and the second beam 104.

[0209] Please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 In some embodiments, the second protective member 60 further includes a third protective part 62, which is disposed on the side wall of the second beam 104 facing the first beam 103 and abuts against the bottom plate 101. A third protective groove 621 is formed on the side of the third protective part 62 facing the bottom plate 101, and the third protective groove 621 is connected to the second clearance groove 104a. In the direction perpendicular to the length direction of the second beam 104, the projected area of ​​the second clearance groove 104a is larger than the projected area of ​​the third protective groove 621, and the projection of the second clearance groove 104a includes the projection of the third protective groove 621.

[0210] The third protective part 62 is disposed on the side wall of the second beam 104 facing the first beam 103; optionally, the third protective part 62 can be a plate structure or a sheet structure, and the third protective part 62 can be fixed to the surface of the second beam 104 by means of bonding, snap-fit ​​connection, fastener connection or other methods.

[0211] It should be understood that during assembly, the heating structure 40 may reciprocate to adjust in the direction of passing through the second clearance groove 104a; thus, the heating structure 40 may come into contact with the groove end of the second clearance groove 104a and on the side of the second beam 104 facing the first beam 103. Therefore, by providing a third protective part 62 on the side wall of the second beam 104 facing the first beam 103, the heating structure 40 can be effectively protected.

[0212] The third protective part 62 may be provided only on the side wall of the second beam 104 facing the first beam 103 and located on the periphery of the second clearance groove 104a; or the third protective part 62 may cover the entire side wall of the second beam 104 facing the first beam 103.

[0213] The third protective part 62 has a third protective groove 621 on the side facing the base plate 101, and the third protective part 62 abuts against the base plate 101; thus, the base plate 101 surrounds the third protective groove 621 and forms a through space. The third protective groove 621 connects to two adjacent energy chambers 10a3; thus, the heating structure 40 can be arranged by passing through the second protective groove 611, the second clearance groove 104a and the third protective groove 621 in sequence.

[0214] In the direction perpendicular to the length L of the first beam 103, the projected area of ​​the second clearance groove 104a is larger than the projected area of ​​the third protective groove 621, and the projection of the second clearance groove 104a includes the projection of the third protective groove 621; thus, the volume of the third protective groove 621 is smaller than the volume of the second clearance groove 104a. When the heating structure 40 passes through the third protective groove 621 and the second clearance groove 104a, the probability of the heating structure 40 contacting the inner wall of the second clearance groove 104a is lower due to the limiting effect of the inner wall of the third protective groove 621; thus, the probability of the heating structure 40 being punctured by burrs can be effectively reduced.

[0215] For example, in some embodiments, the second clearance groove 104a can be a semi-circular groove, and the third protective groove 621 is also a semi-circular groove; wherein, the volume of the third protective groove 621 is smaller than that of the second clearance groove 104a, and the second beam 104 and the third protective part 62 both abut against the bottom plate 101, so that the groove opening end of the second clearance groove 104a is aligned with the groove opening end of the third protective groove 621; thus, the inner wall surface of the third protective groove 621 is closer to the bottom plate 101 than the inner wall surface of the second clearance groove 104a; when the heating structure 40 is assembled by passing through the second clearance groove 104a, the probability of the heating structure 40 contacting the inner wall surface of the second clearance groove 104a is lower, thus effectively protecting the heating structure 40.

[0216] With this configuration, when the heating structure 40 passes through the third clearance groove, the third protective groove 621 opened on the third protective part 62 can limit the heating structure 40, and the probability of the heating structure 40 contacting the groove opening of the third clearance groove on the side facing the first beam 103 is lower. This can effectively reduce the probability of burrs at the groove opening of the third clearance groove causing damage to the heating structure 40.

[0217] Please refer to Figure 4 , Figure 5 , Figure 8and Figure 9 In some embodiments, a third protective portion 62 is provided on one side wall of the second beam 104 facing the first beam 103, and the third protective portion 62 is insulating.

[0218] In this embodiment, the third protective part 62 can cover the entire wall surface of the second beam 104 facing the first beam 103. Thus, when the battery cell 20 is housed in the corresponding energy chamber 10a3 and forms close contact with the second beam 104, the third protective part 62 can provide support for the battery cell 20. Furthermore, since the third protective part 62 can fully cover the side surface of the second beam 104, it avoids uneven stress on the battery cell 20 caused by partial contact between the third protective part 62 and the battery cell 20 when the third protective part 62 covers part of the second beam 104, thus preventing lithium plating.

[0219] The third protective part 62 is insulating; optionally, the third protective part 62 can be made of materials with good insulation properties, such as plastic or injection-molded structure. The third protective part 62 is used to provide insulation protection for the second beam 104, reducing the probability of short circuit between the battery cell 20 and the third beam.

[0220] Please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 In some embodiments, the second protective member 60 further includes a fourth protective part 63, which covers the side wall of the second beam 104 facing away from the base plate 101 and has insulating properties.

[0221] The fourth protective part 63 is disposed on the side wall of the second beam 104 facing away from the base plate 101; optionally, the fourth protective part 63 can be a plate structure or a sheet structure, and the fourth protective part 63 can be fixed to the surface of the second beam 104 by means of bonding, snap-fit ​​connection, fastener connection or other methods.

[0222] Optionally, the fourth protective part 63 can be made of materials with better insulation properties, such as plastic or injection-molded structure.

[0223] The fourth protective part 63 can be integrated with the second protective part 61 and the third protective part 62 by means of bonding, snap-fit ​​connection, fastener connection, integral molding, etc.; or, the second protective part 61, the third protective part 62 and the fourth protective part 63 can be respectively connected to the corresponding side wall of the second beam 104.

[0224] It should be understood that the second beam 104 is housed within the first receiving cavity 10a1 and is divided to form multiple energy chambers 10a3; thus, battery cell assemblies 210 are housed on both opposite sides of the second beam 104; therefore, the exposed portions of the second beam 104 are all susceptible to short-circuiting with live structures. By covering the second beam 104 with a fourth protective portion 63 on the side wall facing away from the base plate 101, the probability of short-circuiting between the battery cells 20 and the fourth beam can be further reduced by using the fourth protective portion 63 to provide insulation protection for the second beam 104.

[0225] Please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 In some embodiments, the second protective part 61, the third protective part 62 and the fourth protective part 63 are integrally formed.

[0226] In this embodiment, the second protective part 61, the third protective part 62, and the fourth protective part 63 are configured as an integrally formed structure. Thus, during assembly, the second protective part 61, the third protective part 62, and the fourth protective part 63 can be simultaneously fitted onto the surface of the second beam 104, covering and protecting the corresponding side surfaces of the second beam 104. This effectively improves the assembly efficiency of the second protective component 60.

[0227] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the housing 10 further includes a third beam 105, which is disposed within the accommodating space 10a. The third beam 105, the first beam 103, the frame 102, and the bottom plate 101 together enclose a first accommodating cavity 10a1. An insulating protective layer 30 is provided on the side wall of the third beam 105 facing the first beam 103.

[0228] Optionally, the third beam 105 may be, but is not limited to, a profile beam, a roll-formed beam, etc.

[0229] It should be understood that the third beam 105 is disposed within the accommodating space 10a and is disposed opposite to the first beam 103; thus, the third beam 105, the first beam 103, the frame 102 and the base plate 101 can together enclose and form the first accommodating cavity 10a1.

[0230] The insulating protective layer 30 refers to a structure with superior insulation performance; optionally, the insulating protective layer 30 may be, but is not limited to, an insulating film, an insulating board, an insulating sheet, an insulating coating, etc. The insulating protective layer 30 may be applied to the surface of the third beam 105 by means of spraying, bonding, snap-fit ​​connection, fastener connection, etc.

[0231] For example, in some embodiments, the insulating protective layer 30 can be an insulating plate, which can be fixed to the side surface of the third beam 105 facing the first beam 103 by adhesive bonding, and completely cover the side surface of the third beam 105 facing the first beam 103.

[0232] This configuration utilizes the insulating protective layer 30 to enhance the insulation protection capability of the third beam 105, thereby reducing the probability of a short circuit between the battery cell 20 and the third beam 105.

[0233] The battery device 100 provided in this application will now be further described according to a specific embodiment.

[0234] Please refer to Figure 4 , Figure 5 , Figure 8 and Figure 9 In this embodiment, the battery device 100 includes a battery cell 20, a power distribution device, a housing 10, and a heating structure 40. Multiple battery cells 20 are arranged in sequence to form a battery cell assembly 210, and the power distribution device is electrically connected to the battery cell assembly 210.

[0235] The housing 10 includes a base plate 101, a frame 102, a first beam 103, a second beam 104, and a third beam 105. The base plate 101 is connected to one end of the frame 102 and encloses a receiving space 10a. The first beam 103 and the third beam 105 are disposed within the receiving space 10a. The opposite ends of the first beam 103 are connected to the frame 102, and the first beam 103 is connected to the base plate 101. The first beam 103 divides the receiving space 10a into a second receiving cavity 10a2. The first beam 103, the third beam 105, the frame 102, and the base plate 101 together enclose a first receiving cavity 10a1. The second beam 104 is disposed within the first receiving cavity 10a1 and divides the first receiving cavity 10a1 into two energy chambers 10a3. The first beam 103, the second beam 104, and the third beam 105 are arranged in parallel. The first beam 103 has a first clearance groove 103a on the side facing the bottom plate 101, which connects the first receiving cavity 10a1 and the second receiving cavity 10a2. The second beam 104 has a second clearance groove 104a on the side facing the bottom plate 101, which connects the two energy chambers 10a3.

[0236] Two energy chambers 10a3 are used to house battery cell modules 210, and the total number of battery cells 20 in the battery cell modules 210 are connected to the base plate 101. The power distribution device is housed in the second receiving cavity 10a2.

[0237] A heating structure 40 is mounted on a base plate 101. The heating structure 40 passes through a first clearance groove 103a and a second clearance groove 104a and is distributed within two energy chambers 10a3 and a second receiving cavity 10a2. In the energy chamber 10a3, a battery cell assembly 210 is mounted on the heating structure 40; in the second receiving cavity 10a2, the heating structure 40 is electrically connected to a power distribution device. A positioning groove 101a is provided on the base plate 101 for positioning and assembling the heating structure 40.

[0238] A first protective member 50 is also provided on the first beam 103. The first protective member 50 includes a first protective part 51, which covers the side wall of the first beam 103 facing the first receiving cavity 10a1 and abuts against the bottom plate 101. A first protective groove 511 is formed on the side of the first protective part 51 facing the bottom plate 101, and the first protective groove 511 is connected to the first clearance groove 103a. In the direction perpendicular to the length direction L of the first beam 103, the projected area of ​​the first clearance groove 103a is larger than the projected area of ​​the first protective groove 511, and the projection of the first clearance groove 103a includes the projection of the first protective groove 511.

[0239] A second protective member 60 is also provided on the second beam 104. The second protective member 60 includes an integrally formed second protective part 61, a third protective part 62, and a fourth protective part 63. The second protective part 61 covers the side wall of the second beam 104 facing away from the first beam 103, the third protective part 62 covers the side wall of the second beam 104 facing the first beam 103, and the fourth protective part 63 covers the side wall of the second beam 104 facing away from the bottom plate 101. At the same time, the second protective part 61 and the third protective part 62 have a second protective groove 611 and a third protective groove 621 respectively on the side facing the bottom plate 101, which are used to limit the heating structure 40 and reduce the probability of it contacting the inner wall of the second clearance groove 104a.

[0240] An insulating protective layer 30 is also provided on the third beam 105. The insulating protective layer 30 is applied to the side wall of the third beam 105 facing the first beam 103. The insulating protective layer 30 is used to provide insulation protection for the third beam 105.

[0241] Please refer to Figures 1 to 3 Secondly, embodiments of this application also provide an electrical device, including a battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0242] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above; the electrical device includes the battery device 100 described above, and when the probability of damage to the heating structure 40 of the battery device 100 is low, the electrical device has better stability in low temperature environments.

[0243] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include Multiple individual battery cells are arranged sequentially to form a battery cell assembly; The power distribution device is electrically connected to the battery cell assembly; The enclosure includes a base plate, a frame, and a first beam. The base plate is connected to one end of the frame and encloses a receiving space. The first beam is disposed within the receiving space, with its opposite ends connected to the frame and the base plate. The first beam divides the receiving space into a first receiving cavity and a second receiving cavity. A through first clearance groove is provided on the side of the first beam facing the base plate, and the first receiving cavity is connected to the second receiving cavity through the first clearance groove. A battery cell assembly is housed in the first receiving cavity and connected to the base plate, while a power distribution device is housed in the second receiving cavity. as well as A heating structure is disposed on the base plate; a portion of the heating structure is located within the first receiving cavity, and the battery cell assembly is disposed on the heating structure; another portion of the heating structure passes through the first clearance groove and is located within the second receiving cavity, and the heating structure is electrically connected to the power distribution device.

2. The battery device according to claim 1, characterized in that: Along the length of the first beam, at least two first clearance grooves are sequentially spaced apart on the side of the first beam facing the bottom plate; The number of heating structures is at least two, and the plurality of heating structures are arranged at intervals along the length direction of the first beam and are respectively provided with the corresponding first clearance groove.

3. The battery device according to claim 2, characterized in that: Multiple battery cells are arranged in a direction perpendicular to the length of the first beam to form at least two sets of battery cell assemblies; multiple sets of battery cell assemblies are arranged sequentially along the length of the first beam; the heating structure is arranged in a direction perpendicular to the length of the first beam, and at least one heating structure is provided on the side of each set of battery cell assemblies facing the bottom plate.

4. The battery device according to any one of claims 1 to 3, characterized in that: A groove is formed on the heating structure within the first receiving cavity.

5. The battery device according to claim 4, characterized in that: Along the length of the first beam, at least one side of the heating structure located within the first receiving cavity is recessed inward to form the groove.

6. The battery device according to claim 5, characterized in that: At least a portion of the groove located within the first receiving cavity is situated in the middle of the first receiving cavity, along a direction perpendicular to the length of the first beam.

7. The battery device according to any one of claims 1 to 3, characterized in that: Within the first accommodating cavity, a first adhesive layer is provided on both the portion of the base plate exposed to the heating structure and the surface of the heating structure. The battery cell is bonded to the base plate and the heating structure through the first adhesive layer.

8. The battery device according to claim 7, characterized in that: The heating structure includes a first film layer, a second film layer, and a heating part sandwiched between the first film layer and the second film layer; the first film layer is bonded to the battery cell through the first adhesive layer, the first film layer and the second film layer are connected through the second adhesive layer, and the second film layer is bonded to the base plate through the second adhesive layer.

9. The battery device according to any one of claims 1 to 3, characterized in that: The base plate is provided with a positioning groove, and at least a portion of the heating structure is accommodated in the positioning groove.

10. The battery device according to any one of claims 1 to 3, characterized in that: The battery device further includes a first protective member, which is disposed on the first beam and serves to separate the heating structure from the inner wall of the first clearance groove.

11. The battery device according to claim 10, characterized in that: The first protective member is disposed within the first clearance groove, and the first protective member covers at least a portion of the inner wall surface of the first clearance groove.

12. The battery device according to claim 10, characterized in that: The first protective component includes a first protective part, which is disposed on the side wall of the first beam facing the first receiving cavity, and the first protective part abuts against the bottom plate; The first protective part has a first protective groove on the side facing the bottom plate, and the first protective groove is connected to the first clearance groove; in the direction perpendicular to the length direction of the first beam, the projected area of ​​the first clearance groove is greater than the projected area of ​​the first protective groove, and the projection of the first clearance groove includes the projection of the first protective groove.

13. The battery device according to claim 12, characterized in that: The first protective part is covered on the side wall of the first beam facing the first receiving cavity, and the first protective part is insulating.

14. The battery device according to any one of claims 1 to 3, characterized in that: The housing further includes at least one second beam disposed within the first receiving cavity. The opposite ends of the second beam are connected to the frame, and the second beam is connected to the base plate. The second beam divides the first receiving cavity into multiple energy compartments. A second clearance groove is provided on the side of the second beam facing the base plate, and the second clearance groove passes through the multiple energy compartments. The battery cell assembly is housed within the multiple energy compartments, and the heating structure passes through the second clearance groove and is disposed within the multiple energy compartments.

15. The battery device according to claim 14, characterized in that: The battery device further includes a second protective member, which is disposed on the second beam and serves to separate the heating structure from the inner wall of the second clearance groove.

16. The battery device according to claim 15, characterized in that: The second protective member is disposed within the second clearance groove, and the second protective member covers at least a portion of the inner wall surface of the second clearance groove.

17. The battery device according to claim 15, characterized in that: The second protective component includes a second protective part, which is disposed on the side wall of the second beam facing away from the first beam, and the second protective part abuts against the bottom plate; The second protective part has a second protective groove on the side facing the bottom plate, and the second protective groove is connected to the second clearance groove; in the direction perpendicular to the length direction of the second beam, the projected area of ​​the second clearance groove is larger than the projected area of ​​the second protective groove, and the projection of the second clearance groove includes the projection of the second protective groove.

18. The battery device according to claim 17, characterized in that: The second protective part is covered on the side wall of the second beam facing away from the first beam, and the second protective part is insulating.

19. The battery device according to claim 18, characterized in that: The second protective component also includes a third protective part, which is disposed on the side wall of the second beam facing the first beam and abuts against the bottom plate; The third protective part has a third protective groove on the side facing the bottom plate, and the third protective groove is connected to the second clearance groove; in the direction perpendicular to the length direction of the second beam, the projected area of ​​the second clearance groove is larger than the projected area of ​​the third protective groove, and the projection of the second clearance groove includes the projection of the third protective groove.

20. The battery device according to claim 19, characterized in that: The third protective part is covered on the side wall of the second beam facing the first beam, and the third protective part is insulating.

21. The battery device according to claim 20, characterized in that: The second protective component also includes a fourth protective part, which covers the side wall of the second beam facing away from the bottom plate, and the fourth protective part is insulating.

22. The battery device according to claim 21, characterized in that: The second protective part, the third protective part, and the fourth protective part are integrally formed.

23. The battery device according to any one of claims 1 to 3, characterized in that: The enclosure also includes a third beam, which is disposed within the accommodating space. The third beam, the first beam, the frame, and the bottom plate together enclose the first accommodating cavity. An insulating protective layer is provided on the side wall of the third beam facing the first beam.

24. An electrical device, characterized in that: Includes the battery device as described in any one of claims 1 to 23, the battery device being used to provide electrical energy.

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