A battery device, an energy storage device, and a power utilization device

Abstract

The application provides a battery device, an energy storage device and a power utilization device. The battery device comprises: a battery cell assembly comprising a first battery cell, a second battery cell and a third battery cell arranged in a first direction and sequentially adjacent to each other, the first battery cell comprising a first pole, and the second battery cell comprising a second pole and a third pole; a first busbar electrically connected to the first pole and the third pole; a second busbar electrically connected to the second pole and the third battery cell; an insulating support comprising a main body, a first ear and a second ear, the first ear being clamped between the second busbar and the second battery cell, and the second ear being clamped between the first busbar and the first battery cell; and a first temperature sampling structure connected to the main body and in heat exchange connection with the first battery cell, and configured to collect the temperature of the first battery cell. In this way, the first temperature sampling structure can stably obtain the temperature information of the first battery cell.

Description

Technical Field

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

[0002] In related technologies, since the heat dissipation conditions of the end battery cells (the battery cells closest to the side wall of the housing along the arrangement direction of the battery cells) are different from those of the middle battery cells, it is necessary to collect the temperature of the end battery cells. Utility Model Content

[0003] This application provides a battery device, an energy storage device, and an electrical device capable of collecting temperature data from individual battery cells.

[0004] The technical solution of this application embodiment is implemented as follows: In a first aspect, embodiments of this application provide a battery device, including a battery cell assembly, a first busbar, a second busbar, an insulating support, and a first temperature sampling structure. The battery cell assembly includes multiple battery cells arranged along a first direction, among which a first battery cell, a second battery cell, and a third battery cell are arranged sequentially adjacent to each other. The first battery cell is located on the outermost side of the battery cell assembly along the first direction. The first battery cell includes a first terminal, and the second battery cell includes a second terminal and a third terminal. The first, second, and third terminals are all located on one side of the battery cell assembly along the second direction. The first and third terminals are arranged opposite to each other along the first direction. The first and third terminals are arranged opposite each other along a third direction, with the first, second, and third directions being perpendicular to each other. The first busbar is electrically connected to the first and third terminals, and the second busbar is electrically connected to the second terminal and the third battery cell. The insulating support includes a main body, a first ear, and a second ear connected to each other. The first ear and the second ear are located on both sides of the main body along a third direction. The first ear is sandwiched between the second busbar and the second battery cell, and the second ear is sandwiched between the first busbar and the first battery cell. The first temperature sampling structure is connected to the main body and is heat-exchangeably connected to the first battery cell. The first temperature sampling structure is configured to collect the temperature of the first battery cell.

[0005] In the above technical solution, clamping the second ear between the first busbar and the first battery cell, and clamping the first ear between the second busbar and the second battery cell, is beneficial to optimizing the spatial layout of the battery device and reducing the impact of the insulating support on the volumetric energy density of the battery device. Furthermore, the first busbar and the first battery cell clamping the second ear, and the second busbar and the second battery cell clamping the first ear, are beneficial to reducing the risk of displacement of the insulating support, thereby improving the positional stability of the first temperature sampling structure relative to the first battery cell, so that the first temperature sampling structure can stably obtain the temperature information of the first battery cell.

[0006] In some embodiments, the battery device further includes an insulating substrate, with a first busbar, a second busbar, and an insulating support connected to the insulating substrate on the side facing away from the battery cell assembly along a second direction. A first ear and a portion of the insulating substrate are sandwiched between the second busbar and the second battery cell, and a second ear and a portion of the insulating substrate are sandwiched between the first busbar and the first battery cell.

[0007] In the above technical solution, the insulating substrate can serve as insulation, and at the same time provide fixation and support for the first busbar, the second busbar and the insulating bracket.

[0008] In some embodiments, the battery device further includes a third busbar connected to the side of the insulating substrate facing away from the battery cell assembly along a second direction. The first battery cell includes a fourth terminal post, which is disposed opposite to the first terminal post along a third direction. The third busbar is electrically connected to the fourth terminal post and configured to electrically connect the battery cell assembly to other components. The third busbar includes a first bonding portion that bonds to and connects to the insulating substrate, and the first bonding portion is located on the side of the fourth terminal post facing the first terminal post along a third direction.

[0009] In the above technical solution, since the first ear is sandwiched between the second busbar and the second battery cell, the first ear avoids the third busbar, which helps to reduce the difficulty of setting the third busbar and optimize the spatial layout of the battery device.

[0010] In some implementations, the insulating support and the orthographic projection of the third busbar along the second direction do not overlap.

[0011] In the above technical solution, the orthographic projections of the insulating support and the third busbar along the second direction do not overlap, which can reduce or even avoid interference between the insulating support and the third busbar on the insulating substrate.

[0012] In some embodiments, the battery device further includes a second temperature sampling structure thermally connected to the third busbar, the second temperature sampling structure being configured to acquire the temperature of the third busbar.

[0013] In the above technical solution, the temperature of the third busbar can be collected by the second temperature sampling structure, which can control the temperature of the third busbar and reduce the risk of the battery device performance deteriorating due to excessive temperature of the third busbar.

[0014] In some embodiments, the main body includes a first connecting portion and a second connecting portion. The first connecting portion is connected to a first temperature sampling structure, and the second connecting portion is connected to an insulating substrate. The thickness of the second connecting portion in the second direction is greater than the thickness of the first connecting portion in the second direction.

[0015] In the above technical solution, the thickness of the second connecting part in the second direction is greater than the thickness of the first connecting part in the second direction, which can increase the structural strength of the second connecting part and help improve the connection stability between the insulating bracket and the insulating substrate.

[0016] In some embodiments, the battery device includes a fastener that connects a second connection portion and an insulating substrate.

[0017] In the above technical solution, the second connecting part and the insulating substrate can be fastened together by fasteners, thereby improving the stability of the connection between the insulating bracket and the insulating substrate.

[0018] In some embodiments, the thickness of the first ear portion and the second ear portion in the second direction is greater than the thickness of the first connecting portion in the second direction.

[0019] In the above technical solution, the thickness of the first ear and the second ear in the second direction is greater than the thickness of the first connecting part in the second direction, which can improve the structural strength of the first ear and the second ear and help reduce the risk of damage to the insulating support under the influence of expansion stress.

[0020] In some embodiments, a groove is formed on the surface of the insulating substrate facing away from the battery cell assembly along the second direction, and at least a portion of the insulating support is received in the groove.

[0021] In the above technical solution, the groove can limit the position of the insulating bracket and reduce the installation height of the insulating bracket on the battery device, which helps to reduce the overall height of the battery device and make the battery device structure compact.

[0022] In some embodiments, the outline of the main body portion as an orthographic projection along the second direction has a first side, the outline of the first ear portion as an orthographic projection along the second direction has a second side, the first side and the second side are connected and set at an angle, and the angle range is 120°-150°; and / or, the outline of the main body portion as an orthographic projection along the second direction includes a third side, the third side is connected and set at an angle with the first side, and the angle range is 120°-150°.

[0023] In the above technical solution, the angle formed by the first side and the second and / or third side is in the range of 120°-150°. This allows the main body to deform appropriately when affected by the expansion stress of the battery cell, reducing the stress concentration of the insulating support, thereby improving the shear resistance of the insulating support in the first direction.

[0024] In some embodiments, the outline of the main body portion as an orthographic projection along the second direction has a fourth side, and the outline of the second ear portion as an orthographic projection along the second direction has a fifth side. The fourth side and the fifth side are connected and form an angle, and the angle ranges from 120° to 150°. And / or, the outline of the main body portion as an orthographic projection along the second direction includes a sixth side. The sixth side is connected and forms an angle with the fourth side, and the angle ranges from 120° to 150°.

[0025] In the above technical solution, the angle formed by the fourth side and the fifth and / or sixth side is in the range of 120°-150°. This allows the main body to deform appropriately when affected by the expansion stress of the battery cell, reducing the stress concentration of the insulating support, thereby improving the shear resistance of the insulating support in the first direction.

[0026] In some embodiments, at least one of the first busbar and the second busbar includes a first busbar portion, a second busbar portion and a second bonding portion connected together. The first busbar portion and the second busbar portion are arranged along a first direction. The first busbar portion is configured to be electrically connected to one of two adjacent battery cells, and the second busbar portion is configured to be electrically connected to the other of two adjacent battery cells. The second bonding portion contacts and is connected to an insulating substrate. The second busbar portion and the insulating substrate are spaced apart in a second direction. The second busbar portion is configured to clamp the first ear portion or the second ear portion together with the battery cell.

[0027] In the above technical solution, the first and second busbars are electrically connected to two adjacent battery cells respectively, which can realize the series or parallel connection of the two adjacent battery cells. The second bonding part contacts and connects with the insulating substrate, which can realize the fixed connection between the first or second busbar and the insulating substrate.

[0028] In some embodiments, the insulating support has a through hole, at least a portion of the first temperature sampling structure is housed in the through hole and connected to the insulating support.

[0029] In the above technical solution, the through hole can provide installation space for the first temperature sampling structure, which is beneficial to improving the space utilization of the battery device and making the battery device structure compact.

[0030] In some embodiments, the first battery cell includes a first pressure relief mechanism, the second battery cell includes a second pressure relief mechanism, the main body has a first pressure relief hole and a second pressure relief hole, and along the second direction, at least a portion of the first pressure relief mechanism is disposed opposite to the first pressure relief hole, and at least a portion of the second pressure relief mechanism is disposed opposite to the second pressure relief hole.

[0031] In the above technical solution, the first pressure relief mechanism and the first pressure relief hole are used to discharge the internal gas of the first battery cell, and the second pressure relief mechanism and the second pressure relief hole are used to discharge the internal gas of the second battery cell, so that the internal pressure and temperature from the first battery cell and the second battery cell can be released, which is beneficial to improving the safety of the battery device.

[0032] In some embodiments, the battery device includes a signal transmitter and a battery management component, the signal transmitter being electrically connected to a first temperature sampling structure and the battery management component, and the signal transmitter being configured to transmit a temperature signal acquired by the first temperature sampling structure to the battery management component.

[0033] In the above technical solution, the signal transmission component can transmit the temperature signal collected by the first temperature sampling structure to the battery management component, and the battery management component can control and protect the first battery cell according to the temperature signal collected by the first temperature sampling structure.

[0034] Secondly, embodiments of this application provide an energy storage device, including multiple battery devices.

[0035] In the above technical solution, by adopting the battery device mentioned above, the safety performance of the energy storage device can be improved.

[0036] Thirdly, embodiments of this application provide an electrical device, including a battery device or an energy storage device.

[0037] In the above technical solutions, by adopting the battery devices or energy storage devices mentioned above, the safety performance of the electrical devices can be improved. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of a single battery cell assembly. Figure 3 for Figure 1 A partial structural schematic diagram of the battery device shown. Figure 4 for Figure 3 A schematic diagram showing the exploded structure of a portion of the battery device. Figure 5 for Figure 4The diagram shows the structure of the insulating support. Figure 6 for Figure 3 A partial structural schematic diagram of the battery device shown. Figure 7 for Figure 3 A partial structural schematic diagram of the battery device shown.

[0039] Explanation of reference numerals in the attached figures 100. Battery assembly; 10. Battery cell assembly; 11. Battery cell; 12. First battery cell; 121. First pressure relief mechanism; 13. Second battery cell; 131. Second pressure relief mechanism; 14. Third battery cell; 15. First terminal post; 16. Second terminal post; 17. Third terminal post; 18. Fourth terminal post; 19. Clearance opening; 21. First busbar; 22. Second busbar; 23. First busbar section; 24. Second busbar section; 25. Second bonding section; 30. Insulating bracket; 31. Main body; 311. First connecting section; 312. Second connecting section; 313. First side; 3 14. Third side; 315. Fourth side; 316. Sixth side; 317. First pressure relief hole; 318. Second pressure relief hole; 32. First ear; 321. Second side; 33. Second ear; 331. Fifth side; 34. Through hole; 40. First temperature sampling structure; 41. Reinforcing plate; 42. Thermal pad; 50. Insulating substrate; 51. Through hole; 52. Mounting groove; 53. Groove; 60. Third busbar; 61. First mating part; 70. Second temperature sampling structure; 80. Fastener; 90. Signal transmission component; 91. Nickel sheet; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0042] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0043] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0044] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0045] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0046] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

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

[0048] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0050] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0051] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0052] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0053] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0054] Temperature is a crucial control parameter for battery cells during operation, directly affecting their safety and charging / discharging strategies. Therefore, temperature sampling is extremely important for the operation and safety of battery cells.

[0055] In related technologies, since the heat dissipation conditions of the end battery cells (the battery cells closest to the side wall of the housing along the arrangement direction of the battery cells) are different from those of the middle battery cells, it is necessary to collect the temperature of the end battery cells.

[0056] In view of this, this application provides a battery device including a battery cell assembly, a first busbar, a second busbar, an insulating support, and a first temperature sampling structure. The battery cell assembly includes multiple battery cells arranged along a first direction, among which a first battery cell, a second battery cell, and a third battery cell are arranged sequentially adjacent to each other. The first battery cell is located on the outermost side of the battery cell assembly along the first direction. The first battery cell includes a first terminal, and the second battery cell includes a second terminal and a third terminal. The first, second, and third terminals are all located on one side of the battery cell assembly along the second direction. The first and third terminals are arranged opposite to each other along the first direction. The first and third terminals are arranged opposite each other along a third direction, with the first, second, and third directions being perpendicular to each other. The first busbar is electrically connected to the first and third terminals, and the second busbar is electrically connected to the second terminal and the third battery cell. The insulating support includes a main body, a first ear, and a second ear connected to each other. The first ear and the second ear are located on both sides of the main body along a third direction. The first ear is sandwiched between the second busbar and the second battery cell, and the second ear is sandwiched between the first busbar and the first battery cell. The first temperature sampling structure is connected to the main body and is heat-exchangeably connected to the first battery cell. The first temperature sampling structure is configured to collect the temperature of the first battery cell.

[0057] The second ear is clamped between the first busbar and the first battery cell, and the first ear is clamped between the second busbar and the second battery cell. This helps to optimize the spatial layout of the battery device and reduce the impact of the insulating support on the volumetric energy density of the battery device. Furthermore, the first busbar and the first battery cell clamping the second ear, and the second busbar and the second battery cell clamping the first ear, help to reduce the risk of displacement of the insulating support, thereby improving the positional stability of the first temperature sampling structure relative to the first battery cell, so that the first temperature sampling structure can stably obtain the temperature information of the first battery cell.

[0058] The technical solutions described in the embodiments of this application are applicable to energy storage devices including battery devices and electrical devices including battery devices or energy storage devices.

[0059] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0060] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0061] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

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

[0063] Please see Figures 1 to 5This application provides a battery device 100, including a battery cell assembly 10, a first busbar 21, a second busbar 22, an insulating support 30, and a first temperature sampling structure 40. The battery cell assembly 10 includes a plurality of battery cells 11 arranged along a first direction X. Among the plurality of battery cells 11, a first battery cell 12, a second battery cell 13, and a third battery cell 14 are arranged adjacent to each other in sequence. The first battery cell 12 is located on the outermost side of the battery cell assembly 10 along the first direction X. The first battery cell 12 includes a first terminal 15, and the second battery cell 13 includes a second terminal 16 and a third terminal 17. The first terminal 15, the second terminal 16, and the third terminal 17 are all located on one side of the battery cell assembly 10 along the second direction Y. The first terminal 15 and the third terminal 17 are arranged opposite to each other along the first direction X. The second terminal 16 and the third terminal 17 are arranged opposite to each other along the first direction X. The third terminal 17 is arranged opposite to the third terminal Z along the third direction, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other; the first busbar 21 is electrically connected to the first terminal 15 and the third terminal 17, and the second busbar 22 is electrically connected to the second terminal 16 and the third battery cell 14; the insulating support 30 includes a main body 31, a first ear 32, and a second ear 33 connected to each other, the first ear 32 and the second ear 33 are arranged on both sides of the main body 31 along the third direction Z, the first ear 32 is sandwiched between the second busbar 22 and the second battery cell 13, and the second ear 33 is sandwiched between the first busbar 21 and the first battery cell 12; the first temperature sampling structure 40 is connected to the main body 31, and the first temperature sampling structure 40 is heat-exchangeably connected to the first battery cell 12, and the first temperature sampling structure 40 is configured to collect the temperature of the first battery cell 12.

[0064] In the above technical solution, the second ear 33 is clamped between the first busbar 21 and the first battery cell 12, and the first ear 32 is clamped between the second busbar 22 and the second battery cell 13. This helps to optimize the spatial layout of the battery device 100, reduce the impact of the insulating support 30 on the volumetric energy density of the battery device 100, and the first busbar 21 and the first battery cell 12 clamp the second ear 33, while the second busbar 22 and the second battery cell 13 clamp the first ear 32. This helps to reduce the risk of displacement of the insulating support 30, thereby improving the positional stability of the first temperature sampling structure 40 relative to the first battery cell 12, so that the first temperature sampling structure 40 can stably obtain the temperature information of the first battery cell 12.

[0065] In the following description of this application, the first direction X is taken as the length direction of the battery device 100, the second direction Y as the height direction of the battery device 100, and the third direction Z as the width direction of the battery device 100. It should be understood that the first direction X, the second direction Y, and the third direction Z specifically refer to directions that are not limited to these.

[0066] Multiple battery cells 11 can be connected in series, in parallel, or in a mixed manner. A mixed manner means that multiple battery cells 11 are connected in both series and parallel.

[0067] One of the second terminal 16 and the third terminal 17 is a positive terminal, and the other is a negative terminal. The first terminal 15 can be either a positive or a negative terminal.

[0068] The first busbar 21 can be welded to the first terminal 15 and the third terminal 17, so that current can flow between the first battery cell 12 and the second battery cell 13 through the first busbar 21.

[0069] The second busbar 22 can be welded to the second terminal 16 and the terminal of the third battery cell 14, so that current can flow between the second battery cell 13 and the third battery cell 14 through the second busbar 22.

[0070] The first busbar 21 can connect the first battery cell 12 and the second battery cell 13 in series or in parallel, and the second busbar 22 can connect the second battery cell 13 and the third battery cell 14 in series or in parallel.

[0071] The first busbar and the second busbar 22 can be bar switches, including but not limited to aluminum bars, copper bars, etc. The structures of the first busbar 21 and the second busbar 22 can be the same or different.

[0072] The insulating bracket 30 can be made of insulating material through processes such as injection molding or vacuum forming, or it can be formed by coating the surface of a metal material with insulating material. The insulating bracket 30 can be a one-piece structure, for example, the main body 31, the first ear 32, and the second ear 33 are integrally formed.

[0073] The first ear portion 32 is sandwiched between the second busbar 22 and the second battery cell 13. That is, a gap is formed between the second busbar 22 and the second battery cell 13, and the first ear portion 32 is located in the gap.

[0074] The second ear portion 33 is sandwiched between the first busbar 21 and the first battery cell 12. That is, there is a gap between the first busbar 21 and the first battery cell 12, and the second ear portion 33 is located in the gap.

[0075] The second pole post can pass through the first ear 32, or it can be located on the side of the first ear 32 away from the second ear 33 along the third direction Z. Similarly, the first pole post can pass through the second ear 33, or it can be located on the side of the second ear 33 away from the first ear 32 along the third direction Z.

[0076] The first temperature sampling structure 40 is heat-exchangeably connected to the first battery cell 12, meaning that heat can be transferred from the first battery cell 12 to the first temperature sampling structure 40, enabling the first temperature sampling structure 40 to collect the temperature of the first battery cell 12. This facilitates temperature control of the first battery cell 12, thereby improving the safety performance of the battery device 100.

[0077] Please see Figure 4 and Figure 6 In some embodiments, the battery device 100 further includes an insulating substrate 50, with the first busbar 21, the second busbar 22, and the insulating support 30 connected to the insulating substrate 50 on the side facing away from the battery cell assembly 10 along the second direction Y. A first ear portion 32 and a portion of the insulating substrate 50 are sandwiched between the second busbar 22 and the second battery cell 13, and a second ear portion 33 and a portion of the insulating substrate 50 are sandwiched between the first busbar 21 and the first battery cell 12.

[0078] In the above technical solution, the insulating substrate 50 can serve as insulation, and at the same time provide fixation and support for the first busbar 21, the second busbar 22 and the insulating bracket 30.

[0079] The first busbar 21 and the second busbar 22 can be riveted to the insulating substrate 50.

[0080] In some embodiments, the first busbar 21, the second busbar 22 and the insulating support 30 may be provided with hot riveting holes, and hot rivets are provided on the insulating substrate 50. The hot rivets pass through the hot riveting holes for riveting, thereby connecting the first busbar 21, the second busbar 22 and the insulating support 30 to the insulating substrate 50.

[0081] Multiple vias 51 can be formed on the insulating substrate 50. The first terminal 15 and the third terminal 17 pass through the vias 51 and are welded to the first bus 21. The second terminal 16 passes through the vias 51 and is welded to the second bus 22, thus achieving both physical and electrical connection.

[0082] Combination Figure 4 For example, the insulating substrate 50 has a plurality of mounting slots 52 on the side opposite to the battery cell assembly 10. The first busbar 21 and the second busbar 22 are adapted to the corresponding mounting slots 52, and the through hole 51 penetrates the mounting slot 52 along the second direction Y.

[0083] The distance between the second busbar 22 and the second battery cell 13 can be greater than, equal to or less than the thickness of the insulating substrate 50, and the distance between the first busbar 21 and the first battery cell 12 can be greater than, equal to or less than the thickness of the insulating substrate 50. This application does not impose any restrictions.

[0084] The strength of the insulating support 30 can be greater than the strength of the insulating substrate 50. The thickness of the insulating support 30 can be greater than the thickness of the insulating substrate 50.

[0085] Please see Figure 4 and Figure 7 In some embodiments, the battery device 100 further includes a third busbar 60 connected to the side of the insulating substrate 50 facing away from the battery cell assembly 10 along the second direction Y. The first battery cell 12 includes a fourth terminal 18, which is disposed opposite to the first terminal 15 along the third direction Z. The third busbar 60 is electrically connected to the fourth terminal 18 and configured to electrically connect the battery cell assembly 10 to other components. The third busbar 60 includes a first bonding portion 61, which is bonded to and connected to the insulating substrate 50, and the first bonding portion 61 is located on the side of the fourth terminal 18 facing the first terminal 15 along the third direction Z.

[0086] The third busbar 60 can serve as the positive or negative total output of the battery cell assembly 10, outputting the current of the battery cell assembly 10 to other components.

[0087] The third busbar 60 can be a bar, including but not limited to aluminum bar, copper bar, etc.

[0088] The fourth terminal 18 can be welded to the third bus 60, achieving both physical and electrical connection.

[0089] One of the first terminal post 15 and the fourth terminal post 18 is a positive terminal post, and the other is a negative terminal post.

[0090] Other components can be internal components of the battery device 100, such as high-voltage control components, specifically relays, fuses, or shunts, or they can be external components of the battery device 100.

[0091] The first bonding portion 61 is bonded to the surface of the battery cell assembly 10 along the second direction Y and to the surface of the insulating substrate 50 facing away from the battery cell assembly 10 along the second direction Y. The first bonding portion 61 may have a hot riveting hole, and the insulating substrate 50 is provided with a hot rivet. The hot rivet passes through the hot riveting hole for riveting, thereby connecting the first bonding portion 61 to the insulating substrate 50.

[0092] In the above technical solution, since the first ear 32 is sandwiched between the second busbar 22 and the second battery cell 13, the first ear 32 avoids the third busbar 60, which helps to reduce the difficulty of setting the third busbar 60 and optimize the spatial layout of the battery device 100.

[0093] In some embodiments, the first battery cell 12 includes a housing, an electrode assembly located within the housing, and a first terminal 15 and a fourth terminal 18 disposed on the housing. The housing is a metal casing, and an insulating film is attached to the outer surface of the metal casing. The insulating film forms a clearance opening 19, which is located between the first terminal 15 and the fourth terminal 18. The metal casing is partially exposed through the clearance opening 19, and the first temperature sampling structure 40 is at least partially located within the clearance opening 19 to contact the metal casing.

[0094] In some embodiments, the outer casing includes a main casing and an end cap, with the end cap covering the main casing. The electrode assembly is located within the space enclosed by the end cap and the main casing. The first electrode post 15 and the fourth electrode post 18 are disposed on the end cap. An insulating film spans the main casing and the end cap. A clearance opening 19 is located on the side of the end cap away from the main casing. The first temperature sampling structure 40 is in contact with the end cap. This shortens the heat conduction path, reduces heat loss during conduction, and helps improve the accuracy of temperature acquisition for the first battery cell 12.

[0095] In some embodiments, the insulating support 30 and the third busbar 60 do not overlap in the orthographic projection along the second direction Y.

[0096] It should be noted that the orthogonal projection of the insulating bracket 30 and the third busbar 60 along the second direction Y means that the projection of the insulating bracket 30 and the third busbar 60 is perpendicular to the second direction Y.

[0097] In the above technical solution, the orthogonal projections of the insulating support 30 and the third busbar 60 along the second direction Y do not overlap, which can reduce or even avoid interference between the insulating support 30 and the third busbar 60 on the insulating substrate 50.

[0098] Please see Figure 6 In some embodiments, the battery device 100 further includes a second temperature sampling structure 70, which is thermally connected to the third busbar 60 and is configured to collect the temperature of the third busbar 60.

[0099] In the above technical solution, the temperature of the third busbar 60 is collected by the second temperature sampling structure 70, which can control the temperature of the third busbar 60 and reduce the risk of the battery device 100 degrading due to excessive temperature of the third busbar 60.

[0100] The second temperature sampling structure 70 is heat-exchangeably connected to the third busbar 60, meaning that heat can be transferred from the third busbar 60 to the second temperature sampling structure 70 to achieve temperature acquisition of the third busbar 60 by the second temperature sampling structure 70.

[0101] The second temperature sampling structure 70 and the first temperature sampling structure 40 can be the same or different.

[0102] In some embodiments, the battery device 100 includes a voltage control component and a bus. The bus is electrically connected to the voltage control component and a third bus 60. The third bus 60 and the bus are connected by bolts. Due to assembly, position, or other factors, the surfaces of the third bus 60 and the bus are not in complete contact at the bolt connection point, resulting in a high resistance at the bolt connection point. This can cause the temperature of the third bus 60 to easily become too high. Therefore, it is necessary to collect the temperature of the third bus 60 for temperature control. The voltage control component may include at least one of a relay, a shunt, and a fuse.

[0103] Please see Figures 3 to 5 In some embodiments, the main body 31 includes a first connecting portion 311 and a second connecting portion 312. The first connecting portion 311 is connected to the first temperature sampling structure 40, and the second connecting portion 312 is connected to the insulating substrate 50. The thickness of the second connecting portion 312 in the second direction Y is greater than the thickness of the first connecting portion 311 in the second direction Y.

[0104] In the above technical solution, the thickness of the second connecting part 312 in the second direction Y is greater than the thickness of the first connecting part 311 in the second direction Y, which can increase the structural strength of the second connecting part 312 and help improve the connection stability between the insulating support 30 and the insulating substrate 50.

[0105] The first connecting part 311 and the second connecting part 312 can be integrally molded, for example, as a one-piece plastic part.

[0106] In some embodiments, a hot rivet is provided on the first connecting part 311, and the first temperature sampling structure 40 includes a reinforcing plate 41 with a hot rivet hole. The hot rivet on the first connecting part 311 passes through the hot rivet hole of the reinforcing plate 41 for riveting, thereby connecting the first connecting part 311 and the first temperature sampling structure 40.

[0107] In some embodiments, the thickness of the first connecting portion 311 in the second direction Y is 1 mm, and the thickness of the second connecting portion 312 in the second direction Y is 2 mm.

[0108] In some embodiments, the surface of the first connection portion 311 facing the battery cell 11 and the surface of the second connection portion 312 facing the battery cell 11 are on the same plane, and the surface of the first connection portion 311 facing away from the battery cell 11 is closer to the battery cell 11 than the surface of the second connection portion 312 facing away from the battery cell 11.

[0109] Please see Figure 6 and Figure 7 In some embodiments, the battery device 100 includes a fastener 80 that connects the second connection portion 312 and the insulating substrate 50.

[0110] In the above technical solution, the second connecting part 312 and the insulating substrate 50 can be fastened together by the fastener 80, thereby improving the stability of the connection between the insulating bracket 30 and the insulating substrate 50.

[0111] Fastener 80 can be a hot rivet. In some embodiments, a hot rivet hole is formed on the second connecting portion 312, and a hot rivet is provided on the insulating substrate 50. The hot rivet on the insulating substrate 50 passes through the hot rivet hole of the second connecting portion 312 for riveting, thereby connecting the second connecting portion 312 and the insulating substrate 50.

[0112] In some embodiments, the thickness of the first ear portion 32 and the second ear portion 33 in the second direction Y is greater than the thickness of the first connecting portion 311 in the second direction Y.

[0113] During the use of the battery device 100, the battery cells 11 often expand, causing adjacent battery cells 11 to tend to separate. Since the first ear 32 and the second ear 33 of the insulating support 30 are respectively connected to the second battery cell 13 and the first battery cell 12, the insulating support 30 is also subjected to stress during the use of the battery device 100. In the above technical solution, the thickness of the first ear 32 and the second ear 33 in the second direction Y is greater than the thickness of the first connecting portion 311 in the second direction Y, which can improve the structural strength of the first ear 32 and the second ear 33 and help reduce the risk of damage to the insulating support 30 under the influence of expansion stress.

[0114] In some embodiments, the thickness of the first connecting portion 311 in the second direction Y is 1 mm, and the thickness of the first ear portion 32 and the second ear portion 33 in the second direction Y is 1.5 mm.

[0115] In some embodiments, the surfaces of the first ear portion 32 and the second ear portion 33 facing the battery cell 11 and the surface of the first connecting portion 311 facing the battery cell 11 are on the same plane, and the surface of the first connecting portion 311 facing away from the battery cell 11 is closer to the battery cell 11 than the surfaces of the first ear portion 32 and the second ear portion 33 facing away from the battery cell 11.

[0116] Please see Figure 4 , Figure 5 and Figure 7 In some embodiments, the insulating substrate 50 has a groove 53 formed on the surface opposite to the battery cell assembly 10 along the second direction Y, and at least a portion of the insulating support 30 is received in the groove 53.

[0117] It should be noted that the groove 53 is formed by the indentation of the insulating substrate 50 from the surface away from the battery cell assembly 10 toward the side closer to the battery cell assembly 10, and the depth of the same groove 53 may be different at different positions.

[0118] In the above technical solution, the groove 53 can limit the insulating bracket 30 and reduce the installation height of the insulating bracket 30 on the battery device 100, which is beneficial to reduce the overall height of the battery device 100 and make the battery device 100 structure compact.

[0119] The first connecting portion 311 may be partially located in the groove 53, meaning the depth of the groove 53 is less than the thickness of the first connecting portion 311. Alternatively, the first connecting portion 311 may be entirely located in the groove 53, meaning the depth of the groove 53 is greater than or equal to the thickness of the first connecting portion 311. Here, the depth of the groove 53 refers to the depth at the groove 53 corresponding to the first connecting portion 311.

[0120] The first ear portion 32 and the second ear portion 33 can protrude from the groove 53. That is, the depth of the groove 53 is less than the thickness of the first ear portion 32 and the second ear portion 33. This facilitates the surface contact between the first busbar 21 and the second ear portion 33, allowing the first busbar 21 to apply a force toward the first battery cell 11, and the surface contact between the second busbar 22 and the first ear portion 32, allowing the second busbar 22 to apply a force toward the second battery cell 13. Here, the depth of the groove 53 refers to the depth of the groove 53 corresponding to the first ear portion 32 and the second ear portion 33.

[0121] Please see Figure 5 In some embodiments, the outline of the main body 31 projected along the second direction Y has a first side 313, and the outline of the first ear 32 projected along the second direction Y has a second side 321. The first side 313 and the second side 321 are connected and set at an angle, and the angle range is 120°-150°; and / or, the outline of the main body 31 projected along the second direction Y includes a third side 314. The third side 314 is connected to the first side 313 and set at an angle, and the angle range is 120°-150°.

[0122] The above can include the following situations: First, the outline of the first ear portion 32 projected along the second direction Y has a second side 321, and the first side 313 is connected to the second side 321 and forms an angle, with the angle ranging from 120° to 150°; Second, the outline of the main body portion 31 projected along the second direction Y includes a third side 314, and the third side 314 is connected to the first side 313 and forms an angle, with the angle ranging from 120° to 150°; Third, the outline of the first ear portion 32 projected along the second direction Y has a second side 321, and the first side 313 is connected to the second side 321 and forms an angle, with the angle ranging from 120° to 150°, and the outline of the main body portion 31 projected along the second direction Y includes a third side 314, and the third side 314 is connected to the first side 313 and forms an angle, with the angle ranging from 120° to 150°.

[0123] In the above technical solution, the angle formed by the first side 313 and the second side 321 and / or the third side 314 is in the range of 120°-150°. This allows the main body 31 to deform appropriately when affected by the expansion stress of the battery cell 11, reducing the stress concentration of the insulating support 30, thereby improving the shear resistance of the insulating support 30 in the first direction X.

[0124] The second side 321 can be the side of the first ear 32 facing the second ear 33 along the first direction X, and the second side 321 can be parallel to the third direction Z.

[0125] The angle α1 formed by the first side 313 and the second side 321 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc.

[0126] The angle α2 formed by the third side 314 and the first side 313 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc. The included angles α1 and α2 can be the same or different.

[0127] Please see Figure 5 In some embodiments, the outline of the main body 31 projected along the second direction Y has a fourth side 315, and the outline of the second ear 33 projected along the second direction Y has a fifth side 331. The fourth side 315 and the fifth side 331 are connected and set at an angle, and the angle range is 120°-150°; and / or, the outline of the main body 31 projected along the second direction Y includes a sixth side 316. The sixth side 316 is connected and set at an angle to the fourth side 315, and the angle range is 120°-150°.

[0128] The above can include the following situations: First, the outline of the second ear portion 33 projected along the second direction Y has a fifth side 331, and the fourth side 315 is connected to the fifth side 331 and forms an angle, with the angle ranging from 120° to 150°; Second, the outline of the main body portion 31 projected along the second direction Y includes a sixth side 316, and the sixth side 316 is connected to the fourth side 315 and forms an angle, with the angle ranging from 120° to 150°; Third, the outline of the second ear portion 33 projected along the second direction Y has a fifth side 331, and the fourth side 315 is connected to the fifth side 331 and forms an angle, with the angle ranging from 120° to 150°, and the outline of the main body portion 31 projected along the second direction Y includes a sixth side 316, and the sixth side 316 is connected to the fourth side 315 and forms an angle, with the angle ranging from 120° to 150°.

[0129] In the above technical solution, the included angle formed by the fourth side 315 and the fifth side 331 and / or the sixth side 316 is in the range of 120°-150°. This allows the main body 31 to deform appropriately when affected by the expansion stress of the battery cell 11, reducing the stress concentration of the insulating support 30, thereby improving the shear resistance of the insulating support 30 in the first direction X.

[0130] The fifth side 331 can be the side of the second ear 33 facing the first ear 32 along the first direction X, and the fifth side 331 can be parallel to the third direction Z.

[0131] The angle β1 formed by the fourth side 315 and the fifth side 331 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc.

[0132] The angle β2 formed by the fourth side 315 and the sixth side 316 can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, etc. The angles β1 and β2 can be the same or different.

[0133] The first side 313 and the fourth side 315 can be set in parallel, and the third side 314 and the sixth side 316 can be set in parallel.

[0134] In some embodiments, the outline of the main body 31 projected along the second direction Y has a first side 313, a third side 314, a fourth side 315, and a sixth side 316; the outline of the first ear 32 projected along the second direction Y has a second side 321; the outline of the second ear 33 projected along the second direction Y has a fifth side 331; the first side 313 and the second side 321 are connected and form an angle α1; the third side 314 and the first side 313 are connected and form an angle α2; the fourth side 315 and the fifth side 331 are connected and form an angle β1; the sixth side 316 and the fourth side 315 are connected and form an angle β2; and the range of the angles α1, α2, β1, and β2 is 120°-150°.

[0135] Please see Figure 6 and Figure 7 In some embodiments, at least one of the first busbar 21 and the second busbar 22 includes a first busbar portion 23, a second busbar portion 24 and a second bonding portion 25 connected together. The first busbar portion 23 and the second busbar portion 24 are arranged along a first direction X. The first busbar portion 23 is configured to be electrically connected to one of two adjacent battery cells 11, and the second busbar portion 24 is configured to be electrically connected to the other of two adjacent battery cells 11. The second bonding portion 25 contacts and is connected to the insulating substrate 50. The second busbar portion 24 and the insulating substrate 50 are arranged at a distance in a second direction Y. The second busbar portion 24 is configured to clamp the first ear portion 32 or the second ear portion 33 together with the battery cell 11.

[0136] In the above technical solution, the first busbar 23 and the second busbar 24 are electrically connected to two adjacent battery cells 11 respectively, so that the two adjacent battery cells 11 can be connected in series or in parallel. The second bonding part 25 contacts and connects to the insulating substrate 50, so that the first busbar 21 or the second busbar 22 can be fixedly connected to the insulating substrate 50.

[0137] The first busbar 21 may include a first busbar portion 23, a second busbar portion 24, and a second fitting portion 25 connected together; the second busbar 22 may include a first busbar portion 23, a second busbar portion 24, and a second fitting portion 25 connected together; or both the first busbar 21 and the second busbar 22 may include a first busbar portion 23, a second busbar portion 24, and a second fitting portion 25 connected together.

[0138] The first busbar 21 and the second busbar 22 can be an integral structure, for example, the first busbar 23, the second busbar 24 and the second bonding part 25 are integrally formed.

[0139] The first busbar 23 is electrically connected to the battery cell 11, which can be achieved by welding the first busbar 23 to the terminal of the battery cell 11. The second busbar 24 is electrically connected to the battery cell 11, which can be achieved by welding the second busbar 24 to the terminal of the battery cell 11.

[0140] The second bonding portion 25 is bonded to the surface of the battery cell assembly 10 along the second direction Y and to the surface of the insulating substrate 50 facing away from the battery cell assembly 10 along the second direction Y. The second bonding portion 25 may have a hot riveting hole, and the insulating substrate 50 is provided with a hot rivet. The hot rivet passes through the hot riveting hole for riveting, thereby connecting the second bonding portion 25 to the insulating substrate 50.

[0141] The second busbar 24 and the insulating substrate 50 are arranged at a distance in the second direction Y. That is, a gap is formed between the second busbar 24 and the insulating substrate 50, and the first ear 32 or the second ear 33 is located in the gap.

[0142] The gap between the second busbar 24 and the insulating substrate 50 can be smaller than the thickness of the first ear 32 or the second ear 33, so that the second busbar 24 can apply a force along the second direction Y toward the battery cell assembly 10 to the first ear 32 or the second ear 33.

[0143] In some embodiments, the second busbar 24 of the first busbar 21 and the first battery cell 12 jointly clamp the second ear 33, and the second busbar 24 of the second busbar 22 and the second battery cell 13 jointly clamp the first ear 32.

[0144] Please see Figure 5 In some embodiments, the insulating support 30 has a through hole 34, at least a portion of the first temperature sampling structure 40 is received in the through hole 34 and connected to the insulating support 30.

[0145] In the above technical solution, the through hole 34 can provide installation space for the first temperature sampling structure 40, which is beneficial to improve the space utilization of the battery device 100 and make the battery device 100 compact.

[0146] At least a portion of the first temperature sampling structure 40 is housed in the through hole 34. This can be either a portion of the first temperature sampling structure 40 being housed in the through hole 34 or the entire first temperature sampling structure 40 being housed in the through hole 34.

[0147] In some embodiments, the first temperature sampling structure 40 includes a temperature sensor and a thermal pad 42. The first connecting portion 311 has a through hole 34, through which the thermal pad 42 passes and contacts the first battery cell 12. The heat from the first battery cell 12 can be transferred to the temperature sensor through the thermal pad 42 to obtain the temperature information of the first battery cell 12. The thermal pad 42 can be a thermally conductive adhesive.

[0148] Fastener 80 can be located on the periphery of through hole 34.

[0149] In some embodiments, the first ear portion 32 is sandwiched between the second busbar 22 and the second battery cell 13, and the second busbar 22 applies a force toward the second battery cell 13 to the first ear portion 32. The second ear portion 33 is sandwiched between the first busbar 21 and the first battery cell 12, and the first busbar 21 applies a force toward the first battery cell 12 to the second ear portion 33. Since the main body 31 is connected to the first ear portion 32 and the second ear portion 33, and the first temperature sampling structure 40 is connected to the main body 31, the force applied by the second busbar 22 to the first ear portion 32 and the force applied by the first busbar 21 to the second ear portion 33 can drive the main body 31 toward the first battery cell 12, thereby driving the first temperature sampling structure 40 toward the first battery cell 12, so that the thermal pad 42 can fully contact the end cap of the first battery cell 12, thereby improving the accuracy of temperature acquisition of the first battery cell 12.

[0150] Please see Figure 2 and Figure 5 In some embodiments, the first battery cell 12 includes a first pressure relief mechanism 121, the second battery cell 13 includes a second pressure relief mechanism 131, the main body 31 is provided with a first pressure relief hole 317 and a second pressure relief hole 318, and along the second direction Y, at least a portion of the first pressure relief mechanism 121 is disposed opposite to the first pressure relief hole 317, and at least a portion of the second pressure relief mechanism 131 is disposed opposite to the second pressure relief hole 318.

[0151] In the above technical solution, the first pressure relief mechanism 121 and the first pressure relief hole 317 are used to discharge the internal gas of the first battery cell 12, and the second pressure relief mechanism 131 and the second pressure relief hole 318 are used to discharge the internal gas of the second battery cell 13, so that the internal pressure and temperature from the first battery cell 12 and the second battery cell 13 can be released, which is beneficial to improving the safety of the battery device 100.

[0152] The first pressure relief mechanism 121 can be actuated to release internal pressure or temperature when the internal pressure or temperature of the first battery cell 12 reaches a predetermined threshold. The second pressure relief mechanism 131 can be actuated to release internal pressure or temperature when the internal pressure or temperature of the second battery cell 13 reaches a predetermined threshold. When the internal pressure or temperature of the first battery cell 12 and the second battery cell 13 reaches the predetermined threshold, the first pressure relief mechanism 121 and the second pressure relief mechanism 131 perform their actions, or a weak structure provided in the first pressure relief mechanism 121 and the second pressure relief mechanism 131 is destroyed, thereby forming an opening or channel for releasing internal pressure or temperature. This threshold is designed according to requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the first battery cell 12 and the second battery cell 13.

[0153] The aforementioned "actuation" refers to the activation of the first pressure relief mechanism 121 and the second pressure relief mechanism 131 to a certain state, thereby releasing the internal pressure and temperature of the first battery cell 12 and the second battery cell 13. The actions of the first pressure relief mechanism 121 and the second pressure relief mechanism 131 may include, but are not limited to: movement of components in the first pressure relief mechanism 121 and the second pressure relief mechanism 131 to form an exhaust channel; rupture, breakage, tearing, or opening of at least a portion of the first pressure relief mechanism 121 and the second pressure relief mechanism 131, etc. When the first pressure relief mechanism 121 and the second pressure relief mechanism 131 are activated, the high-temperature and high-pressure substances inside the first battery cell 12 and the second battery cell 13 are discharged outwards from the activated portion as exhaust materials. In this way, pressure and temperature relief can be achieved in the first battery cell 12 and the second battery cell 13 under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0154] The emissions from the first battery cell 12 and the second battery cell 13 mentioned above include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0155] The first pressure relief mechanism 121 and the second pressure relief mechanism 131 can be explosion-proof valves, gas valves, pressure relief valves, or safety valves, etc.

[0156] The first pressure relief mechanism 121 can be disposed on the outer casing of the first battery cell 12 and located between the first terminal 15 and the fourth terminal 18. The clearance opening 19 can be disposed between the first terminal 15 and the first pressure relief mechanism 121, or it can be disposed between the fourth terminal 18 and the first pressure relief mechanism 121.

[0157] The second pressure relief mechanism 131 can be disposed on the outer casing of the second battery cell 13 and located between the second terminal 16 and the third terminal 17.

[0158] The first connecting portion 311 may have a first pressure relief hole 317, and the second connecting portion 312 may have a second pressure relief hole 318.

[0159] At least a portion of the first pressure relief mechanism 121 is disposed opposite to the first pressure relief hole 317. That is, either a portion of the first pressure relief mechanism 121 is disposed opposite to the first pressure relief hole 317, or the entire first pressure relief mechanism 121 is disposed opposite to the first pressure relief hole 317.

[0160] At least a portion of the second pressure relief mechanism 131 is disposed opposite to the second pressure relief hole 318. That is, either a portion of the second pressure relief mechanism 131 is disposed opposite to the second pressure relief hole 318, or the entire second pressure relief mechanism 131 is disposed opposite to the second pressure relief hole 318.

[0161] Please see Figure 4 and Figure 6 In some embodiments, the battery device 100 includes a signal transmission element 90 and a battery management component. The signal transmission element 90 is electrically connected to the first temperature sampling structure 40 and the battery management component. The signal transmission element 90 is configured to transmit a temperature signal collected by the first temperature sampling structure 40 to the battery management component.

[0162] In the above technical solution, the signal transmission component 90 can transmit the temperature signal collected by the first temperature sampling structure 40 to the battery management component, and the battery management component can control and protect the first battery cell 12 according to the temperature signal collected by the first temperature sampling structure 40.

[0163] The signal transmission component 90 can be a flexible circuit board, and the signal transmission component 90 can be electrically connected to the first bus 21, the second bus 22 and the third bus 60 through the nickel strip 91.

[0164] The nickel sheet 91 can connect the signal transmission component 90 and the first bonding part 61, or it can connect the signal transmission component 90 and the second bonding part 25.

[0165] In some embodiments, the surface of the second bonding portion 25 facing away from the battery cell 11 is closer to the battery cell 11 than the surfaces of the first busbar portion 23 and the second busbar portion 24 facing away from the battery cell 11. This provides mounting space for the nickel sheet 91, reduces the mounting height of the nickel sheet 91 on the battery device 100, and helps to reduce the overall height of the battery device 100, making the battery device 100 structure compact.

[0166] The second temperature sampling structure 70 can be mounted on the nickel plate 91 connecting the third busbar 60 and the signal transmission component 90. The temperature signal collected by the second temperature sampling structure 70 is transmitted to the battery management component through the signal transmission component 90. Since the second temperature sampling structure 70 occupies the space of the first battery cell 12, the space of the first battery cell 12 is limited, which means that the first ear 32 of the insulating bracket 30 needs to borrow the space of the second battery cell 13 for installation.

[0167] The battery management component can consist of multiple components and is used to detect and manage various indicators within the battery device 100.

[0168] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0169] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: A battery cell assembly includes multiple battery cells arranged along a first direction. The multiple battery cells include a first battery cell, a second battery cell, and a third battery cell arranged sequentially adjacent to each other. The first battery cell is located on the outermost side of the battery cell assembly along the first direction. The first battery cell includes a first terminal post, and the second battery cell includes a second terminal post and a third terminal post. The first, second, and third terminal posts are all located on one side of the battery cell assembly along a second direction. The first and third terminal posts are arranged opposite each other along the first direction, and the second and third terminal posts are arranged opposite each other along a third direction. The first, second, and third directions are perpendicular to each other. A first busbar and a second busbar, wherein the first busbar is electrically connected to the first terminal and the third terminal, and the second busbar is electrically connected to the second terminal and the third battery cell; An insulating support includes a main body, a first ear, and a second ear connected to each other. The first ear and the second ear are disposed on both sides of the main body along the third direction. The first ear is sandwiched between the second busbar and the second battery cell, and the second ear is sandwiched between the first busbar and the first battery cell. A first temperature sampling structure is connected to the main body and is heat-exchangeably connected to the first battery cell. The first temperature sampling structure is configured to collect the temperature of the first battery cell.

2. The battery device according to claim 1, characterized in that, The battery device further includes an insulating substrate, wherein the first busbar, the second busbar, and the insulating support are connected to the insulating substrate on the side facing away from the battery cell assembly along the second direction; The first ear portion and part of the insulating substrate are sandwiched between the second busbar and the second battery cell, and the second ear portion and part of the insulating substrate are sandwiched between the first busbar and the first battery cell.

3. The battery device according to claim 2, characterized in that, The battery device further includes a third busbar, which is connected to the side of the insulating substrate facing away from the battery cell assembly along the second direction; The first battery cell includes a fourth terminal post, which is disposed opposite to the first terminal post along the third direction. The third busbar is electrically connected to the fourth terminal post and is configured to electrically connect the battery cell assembly to other components. The third busbar includes a first bonding portion, which is bonded to and connected to the insulating substrate, and the first bonding portion is located on the side of the fourth pole facing the first pole along the third direction.

4. The battery device according to claim 3, characterized in that, The insulating support and the third busbar do not overlap in the orthographic projection along the second direction.

5. The battery device according to claim 3, characterized in that, The battery device further includes a second temperature sampling structure, which is thermally connected to the third busbar and configured to acquire the temperature of the third busbar.

6. The battery device according to claim 2, characterized in that, The main body includes a first connecting part and a second connecting part. The first connecting part is connected to the first temperature sampling structure, and the second connecting part is connected to the insulating substrate. The thickness of the second connecting part in the second direction is greater than the thickness of the first connecting part in the second direction.

7. The battery device according to claim 6, characterized in that, The battery device includes a fastener that connects the second connection portion and the insulating substrate.

8. The battery device according to claim 6, characterized in that, The thickness of the first ear portion and the second ear portion in the second direction is greater than the thickness of the first connecting portion in the second direction.

9. The battery device according to claim 2, characterized in that, The insulating substrate has a groove formed on its surface facing away from the battery cell assembly along the second direction, and at least a portion of the insulating support is received in the groove.

10. The battery device according to claim 2, characterized in that, At least one of the first busbar and the second busbar includes a first busbar portion, a second busbar portion, and a second bonding portion connected together. The first busbar portion and the second busbar portion are arranged along the first direction. The first busbar portion is configured to be electrically connected to one of two adjacent battery cells, and the second busbar portion is configured to be electrically connected to the other of two adjacent battery cells. The second bonding portion contacts and is connected to the insulating substrate. The second busbar portion and the insulating substrate are arranged at a distance in the second direction. The second busbar portion is configured to clamp the first ear portion or the second ear portion together with the battery cell.

11. The battery device according to claim 1, characterized in that, The outline of the main body portion projected along the second direction has a first side, and the outline of the first ear portion projected along the second direction has a second side. The first side and the second side are connected and form an angle, with the angle ranging from 120° to 150°; and / or The outline of the main body portion projected along the second direction includes a third side, which is connected to the first side and forms an angle with it, with the angle ranging from 120° to 150°.

12. The battery device according to claim 1, characterized in that, The outline of the main body portion projected along the second direction has a fourth side, and the outline of the second ear portion projected along the second direction has a fifth side. The fourth side and the fifth side are connected and form an included angle, with the included angle ranging from 120° to 150°; and / or The outline of the main body portion projected along the second direction includes a sixth side, which is connected to the fourth side and forms an angle with the fourth side, with the angle ranging from 120° to 150°.

13. The battery device according to claim 1, characterized in that, The insulating bracket has a through hole, at least a portion of the first temperature sampling structure is housed in the through hole and connected to the insulating bracket.

14. The battery device according to claim 1, characterized in that, The first battery cell includes a first pressure relief mechanism, and the second battery cell includes a second pressure relief mechanism. The main body is provided with a first pressure relief hole and a second pressure relief hole. Along the second direction, at least a portion of the first pressure relief mechanism is disposed opposite to the first pressure relief hole, and at least a portion of the second pressure relief mechanism is disposed opposite to the second pressure relief hole.

15. The battery device according to any one of claims 1-14, characterized in that, The battery device includes a signal transmission component and a battery management component. The signal transmission component is electrically connected to the first temperature sampling structure and the battery management component. The signal transmission component is configured to transmit the temperature signal collected by the first temperature sampling structure to the battery management component.

16. An energy storage device, characterized in that, The battery device includes any one of claims 1-15.

17. An electrical device, characterized in that, Includes the battery device according to any one of claims 1-15 or the energy storage device according to claim 16.

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