Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of battery processing, the battery device comprises a plurality of battery monomers, a plurality of busbars and a sampling assembly, the plurality of battery monomers are arranged in a row at least along a first direction, each battery monomer is provided with an end cover in a second direction, and the sampling assembly is arranged in the first direction. The end cover is provided with two electrode terminals distributed in the third direction and a pressure relief mechanism, at least one battery monomer is a first battery monomer, the end cover of the first battery monomer is provided with a temperature sampling area, and the temperature sampling area is located on one side of the pressure relief mechanism in the first direction; the plurality of busbars are connected with the corresponding electrode terminals; the sampling assembly comprises a temperature sampling piece, and the temperature sampling piece is connected to the temperature sampling area. According to the technical scheme provided by the invention, the temperature sampling piece is connected to the temperature sampling area of the end cover, the accuracy of the temperature sampling result is higher, and the setting of the temperature sampling piece is less affected by the busbar.

Description

Technical Field

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

[0002] In power battery packs, thermal management of individual battery cells is usually required. The purpose is to monitor the temperature status of individual battery cells in real time to prevent thermal runaway and to ensure that the battery cells operate in a suitable temperature range in order to optimize the performance of the battery cells and extend their service life.

[0003] In the process of thermal management, it is usually necessary to sample the temperature of individual battery cells. At present, the accuracy of the temperature sampling results of individual battery cells in battery devices is poor and it is difficult to reflect the actual temperature of individual battery cells. Utility Model Content

[0004] The main objective of this application is to propose a battery device and electrical equipment that aims to improve the problem of poor accuracy in temperature sampling results of individual battery cells in current battery devices.

[0005] In a first aspect, the battery device proposed in this application includes:

[0006] Multiple battery cells are arranged in a row at least along a first direction. Each battery cell has an end cap in a second direction. The end cap is provided with two electrode terminals distributed along a third direction and a pressure relief mechanism between the two electrode terminals. At least one of the battery cells is a first battery cell. The end cap of the first battery cell has a temperature sampling area located on one side of the pressure relief mechanism along the first direction.

[0007] Multiple busbars are connected to corresponding electrode terminals, and the pressure relief mechanism is positioned between two corresponding busbars along the third direction; and,

[0008] A sampling component includes a temperature sampling element connected to the temperature sampling area;

[0009] The first direction, the second direction, and the third direction are arranged to intersect each other.

[0010] The technical solution provided in this application has a temperature sampling area on the end cap of the first battery cell. The sampling component is connected to the temperature sampling area through a temperature sampling element to sample the temperature. The temperature sampling results are highly accurate and can reflect the true temperature level of the first battery cell. Moreover, the temperature sampling area is located on one side of the pressure relief mechanism along the first direction. To ensure the smooth flow of the pressure relief path, the projection of the busbar in the second direction needs to avoid the pressure relief mechanism. Therefore, the presence of the pressure relief mechanism provides an exposed space for the temperature sampling area along the second direction. The temperature sampling element can be connected to the temperature sampling area of ​​the end cap through this exposed space, which improves the problem of difficulty in sampling the end cap temperature in scenarios with narrow battery cells and high busbar overcurrent requirements.

[0011] In some embodiments, the sampling component further includes a flexible circuit board that extends along the first direction and is configured to correspond to the pressure relief mechanism of a row of multiple battery cells.

[0012] The temperature sampling element is disposed on the flexible circuit board.

[0013] In the above technical solution, compared with ordinary conductive cables, flexible circuit boards have a certain degree of toughness and structural strength. By placing the temperature sampling device on the flexible circuit board, the temperature sampling device can be efficiently positioned in the temperature sampling area by means of the positioning and installation of the flexible circuit board.

[0014] In some embodiments, the sampling assembly further includes an isolation plate disposed between the flexible circuit board and the plurality of battery cells;

[0015] The isolation plate is provided with an avoidance opening, and the temperature sampling element passes through the avoidance opening.

[0016] In the above technical solution, an isolation plate is set between the flexible circuit board and the battery cell. On the one hand, the isolation plate can provide a mounting base for the flexible circuit board. On the other hand, the isolation plate can play an insulating role, preventing the flexible circuit board from contacting the metal shell of the battery cell and causing a short circuit. At the same time, the setting of the clearance opening provides clearance space for the temperature sampling component, allowing it to contact the temperature sampling area of ​​the battery cell.

[0017] In some embodiments, the flexible circuit board has an integrated board segment corresponding to the temperature sampling area, and the temperature sampling element is disposed on the integrated board segment;

[0018] The sampling assembly further includes a holding part, which is connected to the isolation plate and disposed on the side of the integrated plate segment away from the temperature sampling element, and the holding part abuts against the integrated plate segment.

[0019] In the above technical solution, with the isolation plate providing the mounting base for the flexible circuit board, a holding part is provided on the side of the integrated board segment away from the temperature sampling device. The connection between the holding part and the isolation plate can be used to form abutment on the integrated board segment, thereby stably holding the flexible circuit board on the isolation plate and reducing the probability of it sliding and loosening.

[0020] In some embodiments, the isolation plate is provided with a groove corresponding to the integrated plate segment, and the clearance opening is provided on the bottom wall of the groove;

[0021] The pressing portion is at least partially disposed within the groove.

[0022] In the above technical solution, the isolation plate is provided with a groove corresponding to the integrated plate segment, and the pressing part is at least partially disposed in the groove. That is, the integrated plate segment is bent relative to its adjacent plate segment and extends into the groove. This arrangement helps to increase the contact area between the integrated plate segment and the isolation plate, further preventing it from loosening. Moreover, the pressing part is at least partially disposed in the groove, so that the pressing part and the isolation plate partially overlap in the second direction, reducing the space occupied by the pressing part and the isolation plate as a whole in the second direction.

[0023] In some embodiments, the isolation plate is provided with a plurality of riveting portions, and the pressing portion is connected to at least one of the flexible circuit boards at a corresponding riveting portion; and / or,

[0024] The isolation plate is provided with mounting openings corresponding to the plurality of electrode terminals, and the plurality of busbars are provided in the corresponding mounting openings and are engaged with the isolation plate.

[0025] In the above technical solution, the multiple riveting parts on the separator plate provide an installation base for the flexible circuit board and the pressing part. The flexible circuit board and the pressing part can be deformed by hot pressing the riveting parts, thereby fixing the flexible circuit board and the pressing part to the separator plate. Since the separator plate has an installation opening, after the separator plate is positioned and installed on the battery cell, the installation opening corresponds to the position of the electrode terminal on the end cover. The busbar can be accurately aligned with the electrode terminal through the installation opening and maintain its position by means of a snap-fit ​​connection, so as to facilitate the efficient connection of the busbar and the electrode terminal by laser welding.

[0026] In some embodiments, the manifold has a recessed area on the side opposite to the end cap;

[0027] The sampling component further includes multiple voltage sampling elements, which are disposed on the flexible circuit board and respectively connected to the corresponding busbars. The voltage sampling elements are at least partially disposed in the corresponding recessed areas.

[0028] In the above technical solution, the sampling component samples the voltage of multiple busbars through multiple voltage sampling elements, which can monitor the voltage drop changes of individual battery cells in real time, which is beneficial for the battery management system to identify and quickly cut off short-circuit faults. A recessed area is provided on the side of the busbar away from the end cover, and the voltage sampling element is at least partially set in the recessed area. The recessed area can be used to overlap the size of the voltage sampling element with the busbar in the second direction, thereby reducing the space occupied by the voltage sampling element in the second direction.

[0029] In some embodiments, in the projection along the second direction, the voltage sampling element and the temperature sampling element are staggered along the first direction; and / or,

[0030] The recessed area extends along the first direction.

[0031] In the above technical solution, the voltage sampling element and the temperature sampling element are staggered along the first direction, which can make full use of the space along the first direction on the side where the end cap of the battery cell is located, and reduce the additional space occupied in the second direction, thereby improving the energy density of the battery device. Since the recessed area extends along the first direction, the recessed area has a certain span in the first direction, thus providing installation redundancy for the voltage sampling element in the recessed area. Multiple busbars can be batch-processed to produce recessed areas with the same size and the same setting position. Voltage sampling elements with different sampling positions can always be installed in the recessed area, thereby improving the efficiency of processing recessed areas on the busbars.

[0032] In some embodiments, at least one of the busbars is a first busbar, which connects to two corresponding electrode terminals in two adjacent battery cells.

[0033] The recessed area of ​​the first busbar is located between the two electrode terminals and extends along the third direction from one side of the first busbar to the other side.

[0034] In the above technical solution, the recessed area of ​​the first busbar has better elastic deformation capability. When the battery cell undergoes thermal expansion, the recessed area of ​​the first busbar can deform, thereby compensating for the increased distance between the two electrode terminals. This helps to alleviate the stress concentration between the first busbar and the electrode terminals. The recessed area of ​​the first busbar can also gradually return to its natural state as the thermal expansion of the battery cell decreases, reducing the connection pressure between the first busbar and the electrode terminals.

[0035] In some embodiments, the first battery cell is disposed between two battery cells located at an edge position; and / or,

[0036] The battery device further includes a fireproof sheet disposed on the side of the plurality of busbars opposite to the individual battery cells; and / or,

[0037] The battery device also includes an insulating patch disposed on the end cap, and the insulating patch has a sampling opening corresponding to the temperature sampling area.

[0038] In the above technical solution, the heat dissipation efficiency of battery cells in non-edge positions is relatively lower than that of battery cells in edge positions. Setting the battery cells in non-edge positions as the first battery cell allows for targeted temperature sampling of these cells that are prone to heat accumulation and temperature rise. The collected temperature parameters are representative and beneficial for temperature control by the battery management system. A fireproof sheet is placed on the side of the busbar away from the battery cell. When a battery cell experiences thermal runaway and ejects high-temperature molten material, the molten material is unlikely to contact the side of the busbar away from the battery cell, reducing the risk of short circuits and effectively preventing the spread of thermal runaway. An insulating patch is placed on the end cap for electrical isolation, effectively reducing the probability of arcing between the busbar and the end cap. This reduces the risk of deflagration when a battery cell experiences thermal runaway. The sampling opening on the insulating patch allows the temperature sampling element to directly contact the metal part of the end cap, resulting in high accuracy of the temperature sampling results.

[0039] Secondly, this application also proposes an electrical device that includes a battery device. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0041] Figure 1 A simplified structural diagram of an embodiment of an electrical device provided in this application, which is a vehicle;

[0042] Figure 2 An exploded structural diagram of an embodiment of the battery device provided in this application;

[0043] Figure 3 A schematic diagram of another embodiment of the battery device provided in this application;

[0044] Figure 4 for Figure 3 Exploded view of the battery device;

[0045] Figure 5 for Figure 4 A schematic diagram of the mid-sampling component;

[0046] Figure 6 for Figure 5 Exploded structural diagram of the middle isolation plate, flexible circuit board, and temperature sampling device;

[0047] Figure 7 for Figure 6 A magnified structural diagram of part A in the middle;

[0048] Figure 8 for Figure 4 A schematic diagram of the structure in which the battery cells are arranged along the first direction.

[0049] Explanation of icon numbers:

[0050] 1000, vehicles;

[0051] 100. Battery assembly; 200. Controller; 300. Motor;

[0052] 1. Battery cell; 11. Housing; 12. End cap; 12a. Temperature sampling area; 121. Electrode terminal; 122. Pressure relief mechanism; 123. Insulating patch; 1231. Sampling opening; 1a. End battery cell; 1b. Middle battery cell; 11b. First battery cell; 2. Busbar; 2a. First busbar; 21a. Recessed area; 21b. Welding area; 3. Sampling assembly; 31. Flexible circuit board; 31a. Integrated board segment; 311. Temperature sampling component; 312. Voltage sampling component; 32. Isolation plate; 321. Riveting part; 322. Buckle; 323. Groove; 324. Clearance opening; 325. Mounting opening; 33. Holding part; 4. End plate; 5. Side plate; 6. Top plate; 7. Fireproof sheet; 8. Box body; 81. Box body; 82. Box cover;

[0053] X, first direction; Y, second direction; Z, third direction.

[0054] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0060] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] The battery device disclosed in this application can be used to provide electrical energy to electrical devices, which can be, but are not limited to, electric vehicles, electric cars, ships, spacecraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

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

[0064] Please refer to Figure 1 , Figure 1 This application provides a simplified structural diagram of an embodiment of an electrical device used in a vehicle. 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 internally installed in 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 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

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

[0066] For a better understanding of the battery device 100 provided in this application, please refer to [link to relevant documentation]. Figures 2 to 4 , Figure 2 An exploded structural diagram of an embodiment of the battery device provided in this application; Figure 3 A schematic diagram of another embodiment of the battery device provided in this application; Figure 4 for Figure 3 A schematic diagram of the exploded structure of the battery device.

[0067] exist Figure 2In the illustrated embodiment, the battery device 100 includes a housing 8 and a battery cell 1. A mounting cavity is formed within the housing 8, through which the battery cell 1 is loaded. The basic structure of the housing 8 generally includes a housing body 81 and a housing cover 82. The housing cover 82 is disposed on the housing body 81 and, together with the housing body 81, defines the mounting cavity. Typically, the battery cell 1 is disposed on the housing body 81. After the battery device 100 is mounted on the vehicle 1000, the housing cover 82 is generally close to the vehicle 1000, and the housing body 81 is generally away from the vehicle 1000. The mounting cavity can be primarily formed in the housing body 81, in which case the housing body 81 can be understood as a basin-shaped structure, and the housing cover 82 covers the housing body 81 to cover the mounting cavity. Alternatively, the mounting cavity can be primarily formed in the housing cover 82, in which case the housing cover 82 can be understood as a dome-shaped structure, and the housing cover 82 covers the housing body 81 to enclose the battery cell 1 mounted on the housing body 81 within the housing cover 82. Of course, the structure of the housing 8 is not limited to these variations.

[0068] The battery cell 1 in the housing 8 is typically configured as multiple cells. These cells can be connected in series, parallel, or a combination thereof. A combination thereof means that some cells are connected in series and others in parallel. These cells can be directly connected in series, parallel, or a combination thereof to form a battery assembly. Alternatively, the cells can be connected in series, parallel, or a combination thereof to form a battery module, which is then connected in series, parallel, or a combination thereof to form a battery assembly. The battery device 100 may also include other structures, such as busbars, for electrical connection between the multiple cells 1 or multiple battery modules. Each cell 1 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The cell 1 can be cylindrical, flat, cuboid, or other shapes.

[0069] exist Figure 3 and Figure 4 In the embodiment shown, the battery device 100 includes a plurality of battery cells 1 arranged along a first direction, two side plates 5, two end plates 4, and a top plate 6. The two end plates 4 are respectively disposed at the ends of the plurality of battery cells 1 along the first direction X. The two side plates 5 are respectively disposed on both sides of the plurality of battery cells 1 along the third direction Z. The two side plates 5 and the two end plates 4 are connected end to end to form a frame. The top plate 6 is disposed on the top of the plurality of battery cells 1 along the second direction Y and is connected to the two end plates 4. In the cavity formed by the two side plates 5, the two end plates 4, and the top plate 6, the plurality of battery cells 1 can also be arranged in multiple rows along the third direction Z.

[0070] In this application, the battery cell 1 may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this application embodiment is not limited to this. The battery cell 1 may be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to this. The battery cell 1 is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell, and pouch battery cell, and this application embodiment is not limited to this.

[0071] To facilitate understanding of the individual battery cells in the battery device provided in this application, please refer to [link / reference]. Figure 8 , Figure 8 for Figure 4 The schematic diagram shows the structure of a single battery cell 1 arranged along a first direction. The structure of a single battery cell 1 typically includes a housing 11, an end cap 12, an electrode assembly, and electrode terminals 121. The end cap 12 covers the opening of the housing 11 and, together with the housing 11, defines a receiving cavity. The electrode assembly is disposed within this receiving cavity. The electrode terminals 121 penetrate the end cap 12 and are electrically connected to the tabs of the electrode assembly via a connecting component. The electrode assembly is the component in the single battery cell 1 where the electrochemical reaction occurs. It 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, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can 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 filled inside the housing.

[0072] In power battery packs, thermal management of individual battery cells is usually required. The purpose is to monitor the temperature status of individual battery cells in real time to prevent thermal runaway and to ensure that the battery cells operate in a suitable temperature range in order to optimize the performance of the battery cells and extend their service life.

[0073] In thermal management, temperature sampling of individual battery cells is usually required. The most common method is to place the temperature sampling device on the busbar, and indirectly reflect the temperature of the individual battery cells by collecting the temperature of the busbar. However, during the cyclic charging and discharging of the individual battery cells, the current will converge at the electrode terminals and the busbar, causing the temperature of the busbar and electrode terminals to rise. When using the busbar for temperature sampling, the collected temperature data is often higher than the actual temperature value of the individual battery cells, thus affecting the accuracy of temperature sampling. Under extreme conditions, due to the higher collected temperature, the battery management system may prematurely limit the charging and discharging capacity of the individual battery cells, making it difficult for the individual battery cells to perform at their full potential and reducing the utilization efficiency of the individual battery cells.

[0074] Currently, in order to change the above situation, technicians have proposed a solution to sample temperature on the end cap of the battery cell. Specifically, the area on the end cap between the electrode terminals and the pressure relief valve is set as the temperature sampling area, and a temperature sampling component is used to sample the temperature in this area. However, in some narrower battery cells, the length of the end cap itself is small, and the busbar is required to have sufficient current carrying capacity. Due to height requirements, the busbar can usually only be widened. This results in the width of the busbar being too large relative to the length of the end cap, compressing the temperature sampling area. In some extreme cases, the busbar even needs to extend to be adjacent to the pressure relief valve to meet the current carrying capacity requirements, making temperature sampling difficult.

[0075] Considering that the pressure relief valve should not be obstructed regardless of how wide the busbar is widened, and that the pressure relief valve does not completely occupy the width of the end cap, there is usually a certain exposed area on the side of the pressure relief valve, which can be used as a temperature sampling area.

[0076] In view of this, this application provides a battery device in which the temperature sampling area of ​​the battery cell is directly set on the end cap and located to the side of the pressure relief valve. The temperature sampling results can directly reflect the true temperature level of the battery cell, aiming to improve the problem of poor accuracy of temperature sampling results of battery cells in current battery devices. To facilitate understanding of the battery device provided in this application, the following is combined with... Figures 4 to 7 To explain, among other things, Figure 5 for Figure 4 A schematic diagram of the mid-sampling component; Figure 6 for Figure 5 Exploded structural diagram of the middle isolation plate, flexible circuit board, and temperature sampling device; Figure 7 for Figure 6 A magnified structural diagram of part A in the middle.

[0077] Please see Figures 4 to 6In one embodiment of this application, the battery device 100 includes a plurality of battery cells 1, a plurality of busbars 2, and a sampling component 3. The plurality of battery cells 1 are arranged in a row at least along a first direction X. Each battery cell 1 has an end cap 12 located in a second direction Y. The end cap 12 is provided with two electrode terminals 121 distributed along a third direction Z, and a pressure relief mechanism 122 located between the two electrode terminals 121. At least one battery cell 1 is a first battery cell 11b. The end cap 12 of the first battery cell 11b has a temperature sampling area 12a, which is located on one side of the pressure relief mechanism 122 along the first direction X. The plurality of busbars 2 are connected to the corresponding electrode terminals 121. The projection of the pressure relief mechanism 122 along the third direction Z is located between the corresponding two busbars 2. The sampling component 3 includes a temperature sampling element 311, which is connected to the temperature sampling area 12a. The first direction X, the second direction Y, and the third direction Z are arranged in pairs.

[0078] It should be noted that "the first direction X, the second direction Y, and the third direction Z intersect each other" means that there is an angle between each pair of the first direction X, the second direction Y, and the third direction Z. This angle can take any value between 0° and 180° (excluding the values ​​of 0° and 180°). Usually, this angle is 90°, that is, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0079] "Multiple battery cells 1 are arranged in a row at least along the first direction X" means that multiple battery cells 1 can be arranged entirely along the first direction X, or multiple battery cells 1 can be arranged in multiple rows along the first direction X and in multiple columns along the third direction Z. For ease of understanding, the following explanation focuses on multiple battery cells 1 in a row.

[0080] In the phrase “the end cap 12 is provided with two electrode terminals 121 distributed along the third direction Z”, the two electrode terminals 121 can also be referred to as positive terminals and negative terminals. In two adjacent battery cells 1, the positive terminal of one battery cell 1 corresponds to the negative terminal of the other battery cell 1 in the first direction X, and the negative terminal of one battery cell 1 corresponds to the positive terminal of the other battery cell 1 in the first direction X.

[0081] The "pressure relief mechanism 122" is typically configured to open when the internal pressure of the battery cell 1 exceeds a threshold, thereby discharging the high-pressure molten particles inside the battery cell 1 and reducing the risk of the battery cell 1 exploding. There are various specific structural types of pressure relief structures, and this application embodiment does not limit them.

[0082] "At least one battery cell 1 is the first battery cell 11b" can be understood as the first battery cell 11b can be one, two, three, or more, or even each battery cell 1 can be the first battery cell 11b. In this embodiment, there is no limitation on the number of first battery cells 11b or the position of the first battery cell 11b in the multiple battery cells 1 in the first row.

[0083] According to the statements "temperature sampling area 12a is located on one side of pressure relief mechanism 122 along the first direction X" and "temperature sampling element 311 is connected to temperature sampling area 12a", the maximum size of temperature sampling area 12a is limited by the width of pressure relief mechanism 122 along the third direction Z and the distance between pressure relief mechanism 122 and the edge of end cap 12 along the first direction X. The minimum size of temperature sampling area 12a should be greater than or equal to the size of temperature sampling part of temperature sampling element 311. This application embodiment does not limit the size and shape of temperature sampling area 12a. The temperature sampling element 311 is connected to temperature sampling area 12a in the following ways: temperature sampling element 311 abuts against temperature sampling area 12a and temperature sampling element 311 is bonded to temperature sampling area 12a by thermally conductive adhesive.

[0084] Regarding the "connection of electrode terminals 121 corresponding to multiple busbars 2", multiple busbars 2 can generally be divided into two types, namely the first busbar 2a and the second busbar 2. The function of the first busbar 2a is to connect the two electrode terminals 121 opposite to each other along the first direction X of two adjacent battery cells 1. The function of the second busbar 2 is to connect the remaining electrode terminals 121 in the battery cells 1 at the end. This application embodiment will not elaborate on this. Regarding the statement that "the projection of the pressure relief mechanism 122 along the third direction Z is between the two corresponding busbars 2", the "two corresponding busbars 2" refer to the two busbars 2 connected to the two electrode terminals 121 that are located on the same end cover 12 as the pressure relief mechanism 122. This can be understood as the pressure relief mechanism 122 being located between two adjacent busbars 2 along the third direction Z in the projection of the second direction Y. Since the temperature sampling area 12a is located on the side of the pressure relief mechanism 122 along the first direction X, the area between the electrode terminals 121 and the pressure relief mechanism 122 can be arbitrarily set by the busbars 2. In other words, the width of the busbars 2 in the third direction Z can be set as large as possible, as long as the busbars 2 can avoid the pressure relief path of the pressure relief mechanism 122 in the projection of the second direction Y.

[0085] "Temperature sampling element 311" refers to a component that has the ability to sense temperature and convert it into an electrical signal. There are various types of temperature sampling elements 311, such as NTC thermistors, RTD platinum resistance thermometers, thermocouples, etc. This application embodiment does not limit this type.

[0086] The technical solution provided in this application has a temperature sampling area 12a on the end cap 12 of the first battery cell 11b. The sampling component 3 is connected to the temperature sampling area 12a through the temperature sampling element 311 to sample the temperature. The temperature sampling results are highly accurate and can reflect the true temperature level of the first battery cell 11b. Moreover, the temperature sampling area 12a is located on one side of the pressure relief mechanism 122 along the first direction X. In order to ensure the smooth flow of the pressure relief path, the projection of the busbar 2 in the second direction Y needs to avoid the pressure relief mechanism 122. Therefore, the existence of the pressure relief mechanism 122 provides the temperature sampling area 12a with an exposed space along the second direction Y. The temperature sampling element 311 can be connected to the temperature sampling area 12a of the end cap 12 through this exposed space, which improves the problem of difficulty in sampling the temperature of the end cap 12 in the current scenario where the battery cell 1 is narrow and the busbar 2 has high overcurrent requirements.

[0087] Please see Figure 6 and Figure 7 In some embodiments, the sampling component 3 further includes a flexible circuit board 31, which extends along the first direction X and is disposed corresponding to the pressure relief mechanism 122 of a row of multiple battery cells 1; wherein, the temperature sampling element 311 is disposed on the flexible circuit board 31.

[0088] It should be noted that multiple battery cells 1 are arranged along the first direction X, and the two electrode terminals 121 on the end cap 12 of the battery cell 1 are distributed along the third direction Z. The multiple electrode terminals 121 on the end caps 12 of the multiple battery cells 1 in a row are arranged in a row along the first direction X, and distributed in two rows along the third direction Z. Multiple busbars 2 are connected to the corresponding electrode terminals 121. That is, multiple busbars 2 are arranged in two rows corresponding to the two rows of electrode terminals 121. Based on this, "the flexible circuit board 31 extends along the first direction X and is arranged to correspond to the pressure relief mechanism 122 of the multiple battery cells 1 in a row" refers to... The extension direction of the flexible circuit board 31 is the same as the arrangement direction of the multiple battery cells 1, and the flexible circuit board 31 is located between the two rows of busbars 2, so that the flexible circuit board 31 can cover the pressure relief mechanism 122 of a row of multiple battery cells 1 in the projection of the second direction Y; "temperature sampling element 311 is set on flexible circuit board 31" means that after the flexible circuit board 31 is processed, it has a built-in temperature sampling element 311. The temperature sampling element 311 can be connected to the wire lines set on the flexible circuit board 31. It can also be understood that the temperature sampling element 311 is integrated into the flexible circuit board 31.

[0089] In the above technical solution, compared with ordinary conductive cables, the flexible circuit board 31 has a certain toughness and structural strength. By setting the temperature sampling component 311 on the flexible circuit board 31, the temperature sampling component 311 can be efficiently positioned in the temperature sampling area 12a with the help of the positioning installation of the flexible circuit board 31.

[0090] Please see Figure 5 and Figure 6 In some embodiments, the sampling component 3 further includes an isolation plate 32, which is disposed between the flexible circuit board 31 and the plurality of battery cells 1; the isolation plate 32 is provided with an avoidance opening 324, through which the temperature sampling element 311 passes.

[0091] It should be noted that in the battery device 100, the "isolation plate 32" is intended to provide electrical isolation. Its material is usually an insulating material, such as polyimide or polyamide. Generally speaking, the isolation plate 32 is installed to the battery cell 1 by positioning. Of course, the isolation plate 32 can also be installed to the crossbeam or longitudinal beam in the housing 8 of the battery device 100. The isolation plate 32 is located between the flexible circuit board 31 and the battery cell 1. Its thickness direction is usually the second direction Y. "The isolation plate 32 is provided with a clearance opening 324" means that the clearance opening 324 passes through the isolation plate 32 along the second direction Y. "The temperature sampling element 311 passes through the clearance opening 324" means that the temperature sampling element 311 passes through the isolation plate 32 through the clearance opening 324, thereby contacting the temperature sampling area 12a on the end cover 12 on the other side. The size of the clearance opening 324 is usually adapted to the temperature sampling element 311.

[0092] In the above technical solution, an isolation plate 32 is provided between the flexible circuit board 31 and the battery cell 1. On the one hand, the isolation plate 32 can provide a mounting base for the flexible circuit board 31. On the other hand, the isolation plate 32 can play an insulating role, preventing the flexible circuit board 31 from contacting the metal shell 11 of the battery cell 1 and causing a short circuit. At the same time, the setting of the clearance opening 324 provides clearance space for the temperature sampling component 311, allowing it to contact the temperature sampling area 12a of the battery cell 1.

[0093] Please see Figure 6 and Figure 7 In some embodiments, the flexible circuit board 31 has an integrated board segment 31a corresponding to the temperature sampling area 12a, and the temperature sampling element 311 is disposed on the integrated board segment 31a; the sampling assembly 3 also includes a holding part 33, which is connected to the isolation plate 32 and disposed on the side of the integrated board segment 31a away from the temperature sampling element 311, and the holding part 33 abuts against the integrated board segment 31a.

[0094] Since the flexible circuit board 31 extends along the first direction X, "the flexible circuit board 31 has an integrated board segment 31a corresponding to the temperature sampling area 12a" means that the flexible circuit board 31 is segmented along the first direction X, and at least one segment is set as an integrated board segment 31a. The integrated board segment 31a coincides with the temperature sampling area 12a in the projection of the second direction Y. There are various ways to connect the holding part 33 to the isolation plate 32. For example, it can be a detachable connection method such as snap-fit ​​connection or threaded connection, or a fixed connection method such as injection molding connection or riveting connection. It is worth mentioning that the connection between the holding part 33 and the isolation plate 32 should be after the installation of the flexible circuit board 31 and the isolation plate 32.

[0095] In the above technical solution, under the premise that the isolation plate 32 provides an installation base for the flexible circuit board 31, a holding part 33 is provided on the side of the integrated board segment 31a away from the temperature sampling component 311. The connection between the holding part 33 and the isolation plate 32 can be used to form an abutment on the integrated board segment 31a, thereby stably holding the flexible circuit board 31 on the isolation plate 32 and reducing the probability of it sliding and loosening.

[0096] In some embodiments, the holding portion 33 is formed on the integrated plate segment 31a.

[0097] Please see Figure 6 and Figure 7 In some embodiments, the isolation plate 32 is provided with a groove 323 corresponding to the integrated plate segment 31a, and the clearance opening 324 is provided on the bottom wall of the groove 323; the pressing part 33 is at least partially provided in the groove 323.

[0098] It should be noted that since the holding part 33 is located on the side of the integrated plate segment 31a away from the temperature sampling member 311, and the holding part 33 is at least partially disposed in the groove 323, it also means that the integrated plate segment 31a is bent and extends into the groove 323 under the abutment action of the holding part 33, so that the temperature sampling member 311 can contact the temperature sampling area 12a of the end cover 12 through the avoidance opening 324 opened on the bottom wall of the groove 323.

[0099] In the above technical solution, the isolation plate 32 is provided with a groove 323 corresponding to the integrated plate segment 31a. The pressing part 33 is at least partially disposed in the groove 323. That is, the integrated plate segment 31a is bent relative to its adjacent plate segment and extends into the groove 323. This arrangement helps to increase the contact area between the integrated plate segment 31a and the isolation plate 32, further preventing them from loosening. Moreover, the pressing part 33 is at least partially disposed in the groove 323, so that the pressing part 33 and the isolation plate 32 partially overlap in the second direction Y, reducing the space occupied by the pressing part 33 and the isolation plate 32 as a whole in the second direction Y.

[0100] Please see Figures 5 to 7 In some embodiments, the isolation plate 32 is provided with a plurality of riveting portions 321, and the pressing portion 33 and at least one of the flexible circuit boards 31 are connected to the corresponding riveting portion 321.

[0101] It should be noted that "riveting part 321" should be understood as a component connected to the flexible circuit board 31 and the holding part 33 by riveting. The flexible circuit board 31 and the holding part 33 typically have riveting holes corresponding to the riveting part 321. After passing through the riveting holes, the riveting part 321 can be deformed by hot pressing and then solidified after cooling, thereby achieving the connection. The material of the riveting part 321 is usually the same as the material of the isolation plate 32, that is, an insulating material; in cases such as Figure 5 In the embodiment shown, part of the riveting portion 321 is simultaneously riveted to both the integrated plate segment 31a and the pressing portion 33.

[0102] In the above technical solution, the multiple riveting parts 321 on the isolation plate 32 provide an installation base for the flexible circuit board 31 and the pressing part 33. The flexible circuit board 31 and the pressing part 33 can be deformed by hot pressing the riveting parts 321, thereby fixing the flexible circuit board 31 and the pressing part 33 to the isolation plate 32.

[0103] Please see Figure 5 and Figure 6 In some embodiments, the isolation plate 32 is provided with mounting openings 325 corresponding to multiple electrode terminals 121, and multiple busbars 2 are provided in the corresponding mounting openings 325 and are engaged with the isolation plate 32.

[0104] There are several ways to connect busbar 2 and isolation plate 32, such as... Figure 5 In the embodiment shown, the busbar 2 and the isolation plate 32 are connected by a snap fastener 322.

[0105] In the above technical solution, since the separator 32 has an installation opening 325, after the separator 32 is positioned and installed on the battery cell 1, the installation opening 325 corresponds to the position of the electrode terminal 121 on the end cover 12. The busbar 2 can be accurately aligned with the electrode terminal 121 through the installation opening 325 and maintain its position by means of a snap-fit ​​connection, so as to facilitate the efficient connection of the busbar 2 and the electrode terminal 121 by laser welding.

[0106] It should be noted that the two parallel technical features mentioned above, namely "the isolation plate 32 is provided with multiple riveting parts 321, and the pressing part 33 and at least one of the flexible circuit board 31 are connected to the corresponding riveting part 321" and "the isolation plate 32 is provided with mounting openings 325 for each of the multiple electrode terminals 121, and multiple busbars 2 are provided in the corresponding mounting openings 325 and are engaged with the isolation plate 32", can be selected or provided simultaneously.

[0107] Please see Figure 5 In some embodiments, the busbar 2 has a recessed area 21a on the side opposite to the end cap 12; the sampling assembly 3 also includes a plurality of voltage sampling elements 312, which are disposed on the flexible circuit board 31 and respectively connected to the corresponding busbar 2, and the voltage sampling elements 312 are at least partially disposed in the corresponding recessed area 21a.

[0108] Compared to the diverse structures of temperature sampling devices 311, the structure of voltage sampling devices 312 is usually simpler. For example, voltage sampling devices 312 can be metal sheets (including nickel sheets, copper sheets, aluminum sheets, etc.). By connecting multiple voltage sampling devices 312 to a voltage test circuit, the voltage value between any two voltage sampling devices 312 can be tested.

[0109] Since the "recessed area 21a" is located on the side of bus 2 away from end cap 12, the recessed area 21a should be recessed towards end cap 12, thus presenting a convex shape on its side closest to end cap 12. Considering that the voltage sampling element 312 needs to be connected to the flexible circuit board 31 on one side and accommodated in the recessed area 21a on the other side, the recessed area 21a is usually located at the edge of bus 2, for example, at the edge of bus 2 along the first direction X, or at the edge of bus 2 along the third direction Z (e.g., ...). Figure 5 (As shown).

[0110] In the above technical solution, the sampling component 3 samples the voltage of multiple busbars 2 through multiple voltage sampling elements 312, which can monitor the voltage drop change of the battery cell 1 in real time, which is conducive to the battery management system to identify and quickly cut off short circuit faults. A recessed area 21a is provided on the side of the busbar 2 away from the end cover 12, and the voltage sampling element 312 is at least partially disposed in the recessed area 21a. The recessed area 21a can be used to overlap the voltage sampling element 312 with the busbar 2 in the second direction Y, thereby reducing the space occupied by the voltage sampling element 312 in the second direction Y.

[0111] Please see Figure 5 and Figure 6 In some embodiments, in the projection of the second direction Y, the voltage sampler 312 and the temperature sampler 311 are staggered along the first direction X.

[0112] In the above technical solution, the voltage sampling element 312 and the temperature sampling element 311 are staggered along the first direction X, which can make full use of the space along the first direction X on the side where the end cap 12 of the battery cell 1 is located, and reduce the additional space occupied in the second direction Y, thereby improving the energy density of the battery device 100.

[0113] In some embodiments, the recessed region 21a extends along a first direction X.

[0114] The recessed region 21a is extended along the first direction X, so that the recessed region 21a has a certain span in the first direction X, thereby providing installation redundancy for the voltage sampling element 312 in the recessed region 21a, that is, the voltage sampling element 312 can be arbitrarily set in the recessed region 21a along the first direction X.

[0115] In the above technical solution, multiple busbars 2 can be batch-processed to produce recessed areas 21a with the same size and the same setting position. Voltage sampling components 312 at different sampling positions can always be installed in the recessed areas 21a to improve the efficiency of processing recessed areas 21a on the busbars 2.

[0116] It should be noted that the two parallel technical features mentioned above, "voltage sampling element 312 and temperature sampling element 311 are staggered along the first direction X" and "recessed area 21a is extended along the first direction X", can be set individually or simultaneously.

[0117] Please see Figure 5 In some embodiments, at least one busbar 2 is a first busbar 2a, which connects two corresponding electrode terminals 121 in two adjacent battery cells 1; wherein, the recessed region 21a of the first busbar 2a is located between the two electrode terminals 121 and extends from one side of the first busbar 2a to the other side along the third direction Z.

[0118] "The two electrode terminals 121 corresponding to two adjacent battery cells 1" refers to the two electrode terminals 121 opposite each other in the first direction X of two adjacent battery cells 1. Based on the arrangement of the two electrode terminals 121 corresponding to the first busbar 2a in the first direction X, and the recessed area 21a of the first busbar 2a between the two electrode terminals 121 in the first direction X, the recessed area 21a extends from one side of the first busbar 2a to the other side in the third direction Z, which is equivalent to dividing the first busbar 2a into two parts in the first direction X. These two parts belong to the welding area 21b of the first busbar 2a, which is used for welding with the electrode terminals 121.

[0119] In the above technical solution, the recessed area 21a of the first busbar 2a has better elastic deformation capability. When the battery cell 1 undergoes thermal expansion, the recessed area 21a of the first busbar 2a can deform, thereby compensating for the increased distance between the two electrode terminals 121. This helps to alleviate the stress concentration between the first busbar 2a and the electrode terminals 121. The recessed area 21a of the first busbar 2a can also gradually return to its natural state as the thermal expansion of the battery cell 1 decreases, reducing the connection pressure between the first busbar 2a and the electrode terminals 121.

[0120] Please see Figure 4 and Figure 8 In some embodiments, the first battery cell 11b is disposed between two battery cells 1 located at the edge.

[0121] Multiple battery cells 1 are arranged in a row along the first direction X. The two battery cells 1 at the edge are called end battery cells 1a, and the battery cells 1 between the two end battery cells 1a are called middle battery cells 1b. Generally speaking, the middle battery cells 1b not only generate heat itself, but are also affected by the heat of the adjacent battery cells 1. Therefore, the heat dissipation efficiency of the middle battery cells 1b is relatively lower than that of the end battery cells 1a. Any one of the middle battery cells 1b can be set as the first battery cell 11b, that is, the first battery cell 11b is located in a non-edge position.

[0122] In the above technical solution, the heat dissipation efficiency of the battery cell 1 located in the non-edge position is relatively lower than that of the battery cell 1 located in the edge position. By setting the battery cell 1 located in the non-edge position as the first battery cell 11b, targeted temperature sampling can be performed on the part of the battery cell 1 that is prone to heat accumulation and temperature rise. The collected temperature parameters are representative and are beneficial for the battery management system to perform temperature control.

[0123] Please see Figure 4 In some embodiments, the battery device 100 further includes a fireproof sheet 7 disposed on the side of the plurality of busbars 2 away from the battery cell 1.

[0124] "Fireproof sheet 7" refers to an insulating sheet structure with high-temperature resistance. Various materials can be used for it, and this embodiment does not limit this choice. "Fireproof sheet 7" can be a single sheet or, as... Figure 4 The fireproof sheet 7 shown is divided into two parts, with each fireproof sheet 7 corresponding to one of the two rows of busbars 2.

[0125] In the above technical solution, a fireproof sheet 7 is installed on the side of the busbar 2 away from the battery cell 1. When the battery cell 1 experiences thermal runaway and ejects high-temperature molten material, the high-temperature molten material is unlikely to come into contact with the side of the busbar 2 away from the battery cell 1, reducing the risk of short circuit in the busbar 2 and effectively preventing the spread of thermal runaway.

[0126] Specifically, the fireproof sheet 7 is made of mica. Mica not only has excellent insulation properties, but also good high temperature resistance. The mica fireproof sheet 7 can effectively block the high-temperature molten material ejected from other thermally runaway battery cells 1, which can greatly reduce the probability of the high-temperature molten material melting and breaking through the fireproof sheet 7, and help prevent the spread of thermal runaway.

[0127] In some embodiments, the battery device 100 further includes an insulating patch 123, which is disposed on the end cap 12 and has a sampling opening 1231 corresponding to the temperature sampling area 12a.

[0128] The insulating patch 123 is usually attached to the end cap 12 by adhesive bonding. It is located on the exposed area of ​​the end cap 12 other than the electrode terminal 121 and the pressure relief mechanism 122. For the temperature sampling area 12a, the insulating patch 123 is additionally provided with a sampling opening 1231, through which the temperature sampling element 311 can contact the end cap 12. The insulating patch 123 is usually made of a variety of materials, such as polyimide, polycarbonate, ceramic composite materials, etc.

[0129] In the above technical solution, the insulating patch 123 on the end cover 12 can play a role in electrical isolation, thereby effectively reducing the probability of arcing between the busbar 2 and the end cover 12. When the battery cell 1 experiences thermal runaway, it can reduce the risk of deflagration. The sampling opening 1231 on the insulating patch 123 allows the temperature sampling element 311 to directly contact the metal part of the end cover 12, resulting in higher accuracy of the temperature sampling results.

[0130] Specifically, the insulating patch 123 is made of mica. Mica not only has excellent insulation properties, but also good high temperature resistance. The mica insulating patch 123 can effectively block the high-temperature molten material ejected from other thermally runaway battery cells 1, which can greatly reduce the probability of the high-temperature molten material melting and breaking through the insulating patch 123, and help prevent the spread of thermal runaway.

[0131] It should be noted that the above three parallel technical features, namely "the first battery cell 11b is disposed between two battery cells 1 located at the edge", "the battery device 100 also includes a fireproof sheet 7, which is disposed on the side of the multiple busbars 2 away from the battery cells 1", and "the battery device 100 also includes an insulating patch 123, which is disposed on the end cap 12, and the insulating patch 123 is provided with a sampling opening 1231 corresponding to the temperature sampling area 12a", can be selected as one, two, or all at the same time.

[0132] This application also proposes an electrical device including a battery device 100 for providing electrical energy. The specific structure of the battery device 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here. The battery device 100 is used to provide electrical energy to the electrical device, which includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, and may also include aircraft such as electric drones and electric passenger aircraft.

[0133] This application proposes a battery device 100, which includes a plurality of battery cells 1 arranged along a first direction X, a plurality of busbars 2, and a sampling assembly 3. Each battery cell 1 has an end cap 12 located in a second direction Y. The end cap 12 is provided with two electrode terminals 121 distributed along a third direction Z, and a pressure relief mechanism 122 located between the two electrode terminals 121. The end cap 12 is also provided with an insulating patch 123 made of mica material. Each row of battery cells 1 includes at least two first battery cells 11b located at non-edge positions. The two first battery cells 11b are arranged adjacent to each other. The end cap 12 of the first battery cells 11b has a temperature sampling area 12a located at the pressure relief mechanism 3. The pressure relief mechanism 122 is located on one side along the first direction X. Two temperature sampling areas 12a are located on the adjacent side of two first battery cells 11b. The insulating patch 123 is provided with a sampling opening 1231 corresponding to the temperature sampling area 12a. Multiple busbars 2 are connected to corresponding electrode terminals 121. The pressure relief mechanism 122 is arranged adjacent to the two corresponding busbars 2. The busbar 2 has a recessed area 21a, which is recessed towards the end cap 12 and extends along the first direction X. The multiple busbars 2 include a first busbar 2a, which connects to the two corresponding electrode terminals 121 of two adjacent battery cells 11b. The recessed area 21a of the first busbar 2a is located on the adjacent side of two first battery cells 11b. The sampling assembly 3 includes an isolation plate 32, a flexible circuit board 31, and multiple voltage sampling elements 312 and temperature sampling elements 311 disposed on the flexible circuit board 31. The voltage sampling elements 312 and temperature sampling elements 311 are staggered along the first direction X. The flexible circuit board 31 extends along the first direction X and is disposed corresponding to the pressure relief mechanism 122 of a row of multiple battery cells 1. The isolation plate 32 is disposed between the flexible circuit board 31 and the multiple battery cells 1. The flexible circuit board 31 has an integrated plate segment 31a corresponding to the temperature sampling area 12a, and the temperature sampling elements 311 are disposed on the integrated plate segment 31a. The integrated plate segment 31a is provided with a groove 323, and the bottom wall of the groove 323 is provided with an avoidance opening 324. The sampling component 3 also includes a holding part 33, which is connected to the isolation plate 32 and is provided on the side of the integrated plate segment 31a away from the temperature sampling component 311. The holding part 33 abuts against the integrated plate segment 31a, which is bent and located in the groove 323. The holding part 33 is at least partially provided in the groove 323. The temperature sampling component 311 is provided with an avoidance opening 324 and contacts the temperature sampling area 12a through the sampling opening 1231. The isolation plate 32 is provided with a plurality of riveting parts 321, and the holding part 33 is connected to the flexible circuit board 31 through the corresponding riveting part 321.The separator 32 has mounting openings 325 corresponding to multiple electrode terminals 121, and multiple busbars 2 are disposed in corresponding mounting openings 325 and connected to the separator 32 by clips 322; a fireproof sheet 7 made of mica material is disposed on the side of the multiple busbars 2 away from the battery cell 1.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery module, comprising: a plurality of battery cells arranged in a row along a first direction, the battery cells having an end cover in a second direction, the end cover being provided with two electrode terminals distributed along a third direction and a pressure relief mechanism between the two electrode terminals, at least one of the battery cells being a first battery cell, the end cover of the first battery cell having a temperature sampling area on one side of the pressure relief mechanism along the first direction; a plurality of bus bars connected with the corresponding electrode terminals, the projection of the pressure relief mechanism along the third direction being between the corresponding two bus bars; and a sampling assembly comprising a temperature sampling element connected with the temperature sampling area; wherein the first direction, the second direction and the third direction are arranged to intersect with each other. The sampling assembly further comprises a flexible circuit board, the flexible circuit board being arranged along the first direction and corresponding to the pressure relief mechanisms of the plurality of battery cells in a row; 2. The battery device of claim 1, wherein wherein the temperature sampling element is arranged on the flexible circuit board. The sampling assembly further comprises an isolation plate arranged between the flexible circuit board and the plurality of battery cells; 3. The battery device of claim 2, wherein the isolation plate is provided with a relief opening, and the temperature sampling element is arranged in the relief opening. The flexible circuit board has an integrated plate segment corresponding to the temperature sampling area, and the temperature sampling element is arranged on the integrated plate segment; 4. The battery device of claim 3, wherein The sampling assembly further comprises a pressing portion connected to the isolation plate and arranged on the side of the integrated plate segment away from the temperature sampling element, and the pressing portion abuts against the integrated plate segment. The isolation plate is provided with a groove corresponding to the integrated plate segment, and the relief opening is arranged on the groove bottom wall; 5. The battery device of claim 4, wherein The pressing portion is at least partially arranged in the groove. The isolation plate is provided with a plurality of riveting portions, and at least one of the pressing portion and the flexible circuit board is connected to the corresponding riveting portion; and / or 6. The battery device of claim 4, wherein The isolation plate is provided with a plurality of mounting openings corresponding to the plurality of electrode terminals, and the plurality of bus bars is arranged in the corresponding mounting openings and is clamped and connected with the isolation plate. The side of the bus bar away from the end cover has a recessed area; 7. The battery device of any one of claims 2 to 6, wherein The sampling assembly further comprises a plurality of voltage sampling elements arranged on the flexible circuit board and connected with the corresponding bus bars, and the voltage sampling elements are at least partially arranged in the corresponding recessed areas. In the projection in the second direction, the voltage sampling elements and the temperature sampling element are arranged in a staggered manner along the first direction; and / or 8. The battery device of claim 7, wherein The recessed area is arranged along the first direction. At least one of the bus bars is a first bus bar, and the first bus bar is connected with the corresponding two electrode terminals of the adjacent two battery cells; 9. The battery device of claim 7, wherein wherein the recessed area of the first bus bar is between the two electrode terminals and extends from one side to the other side of the first bus bar along the third direction. The first battery cell is arranged between the two battery cells at the edge position; and / or 10. The battery device according to any one of claims 1 to 6, wherein ​ The battery device further comprises a fireproof sheet arranged on the side of the busbars away from the battery cells; and / or, The battery device further comprises an insulating patch arranged on the end cover, and the insulating patch is provided with a sampling opening corresponding to the temperature sampling area.

11. An electrical device, characterized by A battery device as claimed in any one of claims 1 to 10.

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