Battery device, energy storage device, and electric device

Abstract

The application discloses a battery device, an energy storage device and a power utilization equipment, and belongs to the technical field of battery devices. The battery device comprises a plurality of battery cells, the plurality of battery cells are adjacently arranged along a first direction, and each battery cell is provided with an explosion-proof valve on the surface of one end thereof in a second direction. At least a part of a sampling circuit board is arranged on one side of the plurality of battery cells in the second direction and is located on the same side of the explosion-proof valve. An avoiding structure is arranged on the sampling circuit board, the avoiding structure is arranged in correspondence with at least a part of the explosion-proof valve, and the projection of the at least a part of the explosion-proof valve is located within the range of the avoiding structure in a plane perpendicular to the second direction, so that the corresponding explosion-proof valve is at least partially exposed, the risk of pressure relief caused by the explosion-proof valve being shielded by the sampling circuit board is reduced, and the structural reliability of the sampling circuit board and the safety performance of the battery device are improved.

Description

Technical Field

[0001] This application belongs to the field of battery device technology, specifically relating to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] With the development of new energy technologies, battery devices are widely used in vehicles, energy storage equipment, and various electrical appliances. Battery cells are typically equipped with explosion-proof valves. When the internal pressure of a battery cell abnormally increases, the explosion-proof valve opens and releases the high-temperature, high-pressure gas inside the cell through the vent, reducing the risk of the cell rupturing or further thermal runaway. Simultaneously, sampling structures are usually also included in battery devices to monitor the operating status of multiple cells.

[0003] In related technologies, to improve the integration of the sampling structure, the sampling circuit board covers the end areas of multiple battery cells. However, since explosion-proof valves are also located in the end areas of the battery cells, when the sampling circuit board is placed on the side of the battery cell where the explosion-proof valve is located, the physical portion of the sampling circuit board may obstruct the explosion-proof valve or be located in the exhaust path. When a battery cell malfunctions and triggers the explosion-proof valve to open, the discharged high-temperature and high-pressure gas may be blocked by the sampling circuit board, resulting in poor exhaust, local pressure increase, or abnormal airflow direction, thereby reducing the smoothness of exhaust. Utility Model Content

[0004] This application aims to provide a battery device, energy storage device, and electrical equipment to solve the problem of low exhaust smoothness of explosion-proof valves during thermal runaway or abnormal pressure rise.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a battery device comprising multiple battery cells arranged adjacent to each other along a first direction, each battery cell having an explosion-proof valve on one end surface in a second direction; a sampling circuit board, at least a portion of which is disposed on one side of the multiple battery cells in the second direction and is located on the same side of the battery cells as the explosion-proof valve; and an avoidance structure disposed on the sampling circuit board, the avoidance structure being correspondingly disposed to at least a portion of the explosion-proof valve, wherein the projection of at least a portion of the explosion-proof valve is located within the range of the avoidance structure on a plane perpendicular to the second direction, so that at least a portion of the corresponding explosion-proof valve is exposed.

[0007] According to the battery device of this application, the first direction and the second direction are different. Multiple battery cells are arranged adjacent to each other along the first direction, and each battery cell has an explosion-proof valve with a vent on one end surface in the second direction. At least a portion of a sampling circuit board is located on one side of the multiple battery cells in the second direction, and is on the same side as the explosion-proof valve. A clearance structure on the sampling circuit board is correspondingly arranged with at least a portion of the explosion-proof valves, such that on a plane perpendicular to the second direction, the sampling circuit board is outside the projection range of at least a portion of the explosion-proof valves, i.e., the projection of at least a portion of the explosion-proof valves is within the range of the clearance structure, thus exposing at least a portion of the corresponding explosion-proof valves. Without significantly increasing the height and assembly complexity of the battery device, this design balances the centralized sampling function of the sampling circuit board and the venting and pressure relief function of the explosion-proof valves, reduces the risk of pressure leakage caused by the vent being blocked by the sampling circuit board, and improves the structural reliability of the sampling circuit board and the safety performance of the battery device.

[0008] In some embodiments, the sampling circuit board includes a first board and a second board connected together, the second board being disposed at one end of the first board in a first direction; wherein the first board extends along the first direction, a portion of the second board is located on one side of the battery cell in the second direction, and a portion of the second board is located on one side of the battery cell in the first direction.

[0009] By dividing the sampling circuit board into a first board and a second board, the first board can mainly undertake the functions of signal acquisition and line extension along the arrangement direction of multiple cells, while the second board can mainly undertake the functions of sampling signal aggregation, terminal setting, connector arrangement or connection with external battery management system. This allows the sampling area and aggregation area of ​​the sampling circuit board to cooperate with each other in structure and function, reducing the risk of line crossing and concentrated stacking.

[0010] In some embodiments, the avoidance structure includes: a first avoidance structure disposed on the first plate, the first avoidance structure being a through hole penetrating the first plate, the first avoidance structure being disposed correspondingly to a plurality of explosion-proof valves, so that at least a portion of the plurality of explosion-proof valves are exposed.

[0011] By setting a first clearance structure on the first plate and setting the first clearance structure in correspondence with multiple explosion-proof valves, a through clearance space can be formed on the first plate at the position corresponding to the explosion-proof valve, thereby reducing the obstruction of multiple explosion-proof valves by the solid part of the first plate.

[0012] In some embodiments, one of the multiple battery cells located at one end in the first direction is the end battery cell, and the avoidance structure includes: a second avoidance structure disposed on a second plate, the second plate overlapping the projection portion of the explosion-proof valve of the end battery cell in the second direction, the second avoidance structure being correspondingly disposed with the explosion-proof valve of the end battery cell so that at least a portion of the explosion-proof valve of the end battery cell is exposed.

[0013] In some embodiments, the second plate covers a portion of the explosion-proof valve of the end cell, and the projected area of ​​the covered portion on a plane perpendicular to the second direction is less than or equal to 30% of the projected area of ​​the explosion-proof valve on the plane.

[0014] The second plate can utilize the area near the terminal cell to collect sampling signals and connect to external systems. The second clearance structure exposes at least a portion of the terminal cell's explosion-proof valve, while the limitation of a coverage area of ​​less than or equal to 30% further controls the degree to which the second plate obstructs the explosion-proof valve. This reduces the risk of the terminal cell being blocked by the second plate during depressurization, minimizes the direct impact of high-temperature, high-pressure gases on the second plate, and improves the venting safety and electrical connection reliability of the battery device under compact layout conditions.

[0015] In some embodiments, a collection terminal is provided at the end of the second plate that is away from the first plate, and the sampling circuit board is provided with a plurality of sampling lines, one end of which is used to connect to the battery cell, and the other end of which is connected to the collection terminal.

[0016] One end of the sampling line connects to the battery cell, and the other end connects to the collection terminal, enabling the sampling signals from multiple battery cells to be centrally collected and output uniformly by the sampling circuit board. The end of the second board furthest from the first board has a collection terminal, concentrating external connections at the end of the sampling circuit board, which helps reduce the number of wire harnesses, lowers assembly complexity, and improves connection reliability. When this structure is combined with the aforementioned avoidance structure, it achieves integrated sampling lines and end-collected output while minimizing the obstruction of the explosion-proof valve by the sampling circuit board and its terminal structure.

[0017] In some embodiments, the battery device further includes: electrode terminals, located on the same side of the battery cell in the second direction as the explosion-proof valve; and a conductive connector, one end of which is electrically connected to the electrode terminals and the other end of which is connected to the sampling line.

[0018] The electrode terminals and the explosion-proof valve are located on the same side of the battery cell in the second direction, allowing the sampling circuit board to simultaneously achieve sampling connection and explosion-proof valve avoidance on the top or same side of the battery cell. One end of the conductive connector is electrically connected to the electrode terminals, and the other end is connected to the sampling line, enabling reliable transmission of the battery cell's electrical signal to the sampling circuit board. This design improves the mechanical strength and electrical stability of the sampling connection, reduces the number of independent wiring harnesses and connectors, and, in conjunction with the avoidance structure, achieves integrated layout of the sampling circuit board while minimizing obstruction of the explosion-proof valve, thereby improving the electrical reliability and safety performance of the battery device.

[0019] In some embodiments, the conductive connector is fixedly connected to the sampling circuit board and is electrically connected to the sampling line.

[0020] The conductive connector is fixedly connected to the sampling circuit board and electrically connected to the sampling line, enabling the electrical signal from the battery cell to be stably transmitted to the sampling line. Simultaneously, the conductive connector and the sampling circuit board form an integrated structure. When used in conjunction with the clearance structure, this improves battery assembly efficiency, sampling connection reliability, and internal gas flow capacity, while reducing the risk of the sampling circuit board and conductive connector obstructing the explosion-proof valve, thereby enhancing the safety and reliability of the battery device.

[0021] In some embodiments, the sampling circuit board has a reinforcement area at the edge of the avoidance structure, the reinforcement area is located between the avoidance structure and the sampling line, and the thickness of the reinforcement area is greater than the thickness of other areas of the sampling circuit board.

[0022] The sampling circuit board has a reinforcement zone at the edge of the avoidance structure. The reinforcement zone is located between the avoidance structure and the sampling line, and its thickness is greater than that of other areas of the sampling circuit board. This can improve the local structural strength around the avoidance structure while forming an exhaust avoidance space, reduce the risk of cracks spreading from the edge of the avoidance structure to the sampling line, protect the electrical connection continuity and signal transmission reliability of the sampling line, improve the mechanical reliability of the sampling circuit board under vibration, shock, thermal cycling and explosion-proof valve opening exhaust conditions, and work together with the avoidance structure to ensure the safety of explosion-proof valve exhaust and the electrical sampling function of the sampling circuit board.

[0023] In some embodiments, the first plate is elongated; or, the dimension of the end of the first plate facing the second plate in a third direction is greater than the dimension of the end of the first plate away from the second plate in a third direction; wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0024] The first board is elongated, which allows the sampling circuit board to be adapted to the structure of multiple cells arranged adjacent to each other along the first direction, thus realizing centralized sampling wiring along the first direction. The dimension of the first board facing the second board in the third direction is greater than the dimension of the first board away from the second board in the third direction. This can increase the wiring space near the second board area and reduce the board surface occupation in the area away from the second board area according to the pattern of sampling lines converging towards the second board.

[0025] In some embodiments, the first plate is located on the side of the plurality of explosion-proof valves facing a third direction, and the clearance structure is correspondingly arranged with the plurality of explosion-proof valves; wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0026] In some embodiments, on a plane perpendicular to the second direction, the minimum distance between the edge of the clearance structure and the edge of the corresponding explosion-proof valve is not less than 1 mm. This provides a reliable clearance for the explosion-proof valve, ensuring its full exposure during manufacturing, assembly, and use. This defined distance helps reduce the risk of the sampling circuit board partially obstructing the explosion-proof valve and also reduces the impact of high-temperature, high-pressure gas on the edge of the clearance structure, the sampling line, and the reinforcement area when the explosion-proof valve is opened, thereby improving the exhaust safety of the battery device and the structural reliability of the sampling circuit board.

[0027] In some embodiments, the battery device further includes: a buffer member disposed between the sampling circuit board and the battery cell, and the buffer member is in contact with the sampling circuit board and the battery cell respectively; wherein the buffer member is provided with a buffer avoidance structure corresponding to the explosion-proof valve.

[0028] A buffer is positioned between the sampling circuit board and the battery cell, making contact with both. This improves the installation stability of the sampling circuit board, absorbs vibration and shock, and reduces the risk of damage to the sampling circuit board, sampling lines, and conductive connectors. The buffer also features a buffer clearance structure corresponding to the explosion-proof valve, ensuring that it provides cushioning support and insulation without obstructing the valve. The buffer and clearance structure work together to form an exhaust channel from the explosion-proof valve through the buffer clearance structure to the sampling circuit board clearance structure, thus balancing the mechanical reliability, electrical insulation reliability, and pressure relief safety of the battery device.

[0029] In some embodiments, the inner wall of the buffer clearance structure forms a flow guide surface, which gradually expands in a direction away from the explosion-proof valve.

[0030] The inner wall of the buffer avoidance structure forms a flow guide surface, which gradually expands away from the explosion-proof valve. This allows the buffer to not only provide buffer support and insulation, but also to diffuse and guide the gas discharged from the explosion-proof valve. This reduces the resistance of the buffer to the exhaust airflow, reduces the concentrated impact of high-temperature and high-pressure gas on the inner wall of the buffer avoidance structure, and together with the avoidance structure on the sampling circuit board, forms a smoother pressure relief channel, thereby improving the exhaust safety and structural reliability of the battery device under abnormal operating conditions.

[0031] In some embodiments, the avoidance structure penetrates the sampling circuit board along the second direction.

[0032] The clearance structure penetrates the sampling circuit board along the second direction, forming a through exhaust clearance channel at the position of the corresponding explosion-proof valve. This significantly reduces the obstruction and obstruction of the explosion-proof valve by the sampling circuit board, allowing the gas after the explosion-proof valve is opened to be discharged through the clearance structure.

[0033] Secondly, this application provides an energy storage device, which includes any of the above-mentioned battery devices, and the battery devices are used to store electrical energy.

[0034] By adopting the above-mentioned battery device, the energy storage device can store electrical energy using multiple cells, and sample and monitor the status of multiple cells through sampling circuit boards, sampling lines, conductive connectors and collection terminals. At the same time, the avoidance structure, buffer avoidance structure and other structures help the explosion-proof valve to have a reliable pressure relief channel, thereby improving the electrical reliability and safety of the energy storage device.

[0035] It should be noted that since the energy storage device includes any battery device, it has the beneficial effects of any of the aforementioned battery devices, which will not be elaborated here.

[0036] Thirdly, this application provides an electrical device, which includes any of the above-mentioned battery devices, and the battery devices are used to provide electrical energy.

[0037] By adopting the above-mentioned battery device, the electrical equipment can use the battery device to supply power to its electrical load, drive system, control system or auxiliary system, and can sample and monitor the status of multiple cells through the sampling circuit board, sampling line, conductive connector and collection terminal in the battery device. At the same time, the avoidance structure, buffer avoidance structure and other structures help the explosion-proof valve to have a reliable exhaust space, thereby improving the power supply reliability and use safety of the electrical equipment.

[0038] It should be noted that since the electrical equipment includes any battery device, it has the beneficial effects of any of the aforementioned battery devices, which will not be elaborated further here.

[0039] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is one of the schematic diagrams of a battery device according to an embodiment of this application;

[0042] Figure 2 This is a second schematic diagram of a battery device according to an embodiment of this application;

[0043] Figure 3 This is one of the schematic diagrams of a sampling circuit board according to an embodiment of this application;

[0044] Figure 4 This is a third schematic diagram of a battery device according to an embodiment of this application;

[0045] Figure 5 This is a fourth schematic diagram of a battery device according to an embodiment of this application;

[0046] Figure 6 This is a schematic diagram of the first plate body according to an embodiment of this application;

[0047] Figure 7 This is a second schematic diagram of a sampling circuit board according to an embodiment of this application;

[0048] Figure 8 This is a schematic diagram of the battery cell and buffer according to an embodiment of this application;

[0049] Figure 9 This is a schematic diagram of an energy storage device according to an embodiment of this application;

[0050] Figure 10 This is a schematic diagram of an electrical device according to an embodiment of this application.

[0051] Figure label:

[0052] 100: Battery assembly; 102: Battery cell; 1021: Explosion-proof valve; 1024: Terminal battery cell; 104: Sampling circuit board; 1041: Sampling line; 1042: First board; 1044: Second board; 1045: Converging terminal; 1048: Reinforced area; 106: Clearance structure; 1062: First clearance structure; 1064: Second clearance structure; 1082: Electrode terminal; 1084: Conductive connector; 110: Buffer; 1102: Buffer clearance structure; 1104: Guide surface;

[0053] 200: Energy storage device;

[0054] 300: Electrical equipment;

[0055] A: First direction; B: Second direction; C: Third direction. Detailed Implementation

[0056] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0057] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0058] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] The following is combined with Figures 1 to 10 This application describes a battery device, an energy storage device, and an electrical appliance according to embodiments thereof.

[0061] When a battery experiences thermal runaway, it is usually accompanied by a rapid increase in temperature, the emission of smoke from inside the battery, fire, or even an explosion, which seriously threatens the personal and property safety of users.

[0062] In related technologies, the sampling circuit board laid flat above the battery cell can easily obstruct the explosion-proof valve located on the top or side of the cell. In the event of thermal runaway, the obstructed explosion-proof valve may have difficulty releasing pressure smoothly, and high-temperature, high-pressure gases may not be able to escape in time, leading to a sharp increase in internal pressure of the battery pack and posing a potential risk of more serious explosions or fires. Furthermore, simply designing the sampling circuit board to partially raise or offset the entire circuit board to reduce obstruction may result in structural complexity, assembly difficulties, or the occupation of additional space.

[0063] Based on the above considerations, to improve venting smoothness, this application proposes a battery device in which, when the internal pressure of the battery cell increases and triggers the explosion-proof valve to open, at least a portion of the corresponding explosion-proof valve is exposed. High-temperature, high-pressure gas can be discharged through the exposed vent, thereby reducing the risk of poor pressure relief caused by the vent being blocked by the sampling circuit board. Thus, the battery device can improve the venting smoothness of the explosion-proof valve while maintaining the centralized arrangement and compact structure of the sampling circuit board, reducing the possibility of damage to the sampling circuit board from airflow impact, thermal shock, or mechanical impact, and improving the safety and reliability of the battery device under conditions such as abnormal gas generation, increased internal pressure, or thermal runaway.

[0064] like Figure 10 As shown, the battery device 100 disclosed in this application can be applied to electrical equipment 300 such as power battery systems for new energy vehicles, battery systems for energy storage containers, and battery systems for energy storage power stations.

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

[0066] In this application, the battery device 100 mentioned in the embodiments refers to a single physical module comprising one or more battery cells, i.e., battery cells 102, to provide higher voltage and capacity. For example, the battery device 100 is composed of multiple battery cells connected in series or in parallel.

[0067] Combination Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of this application, a battery device 100 is proposed. The battery device 100 includes a plurality of battery cells 102, a sampling circuit board 104, and a clearance structure 106. The first direction A and the second direction B are different; the plurality of battery cells 102 are arranged adjacent to each other along the first direction A, and each battery cell 102 is positioned such that… Figure 4 An explosion-proof valve 1021 with an exhaust port is provided on one end surface of the second direction B. At least a portion of the sampling circuit board 104 is disposed on one side of the plurality of battery cells 102 in the second direction B, and is located on the same side of the battery cell 102 as the explosion-proof valve 1021. An avoidance structure 106 is disposed on the sampling circuit board 104, and the avoidance structure 106 is correspondingly disposed to at least a portion of the explosion-proof valves 1021; on a plane perpendicular to the second direction B, the projection of at least a portion of the explosion-proof valves is located within the range of the avoidance structure, such that the solid portion of the sampling circuit board 104 is located outside the projection range of at least a portion of the explosion-proof valves 1021, so that at least a portion of the corresponding explosion-proof valve 1021 is exposed.

[0068] It should be noted that the solid part refers to the part of the sampling circuit board 104 that contains solid materials such as substrate, conductive lines, pads, cover film or reinforcement layer, excluding the empty area formed by the avoidance structure 106.

[0069] Through the above configuration, the sampling circuit board 104 can acquire voltage, temperature, or other status signals in the area close to multiple battery cells 102, and the avoidance structure 106 can reduce the obstruction of the explosion-proof valve 1021 by the physical part of the sampling circuit board 104. When the internal pressure of the battery cell 102 increases and triggers the explosion-proof valve 1021 to open, at least a part of the corresponding explosion-proof valve 1021 is exposed, and high-temperature and high-pressure gas can be discharged outward through the exposed area, thereby reducing the risk of poor pressure relief caused by the explosion-proof valve 1021 being obstructed by the sampling circuit board 104. Thus, the battery device 100 can improve the exhaust smoothness of the explosion-proof valve 1021 while maintaining the centralized arrangement and compact structure of the sampling circuit board 104, reduce the possibility of the sampling circuit board 104 being damaged by airflow impact, thermal shock, or mechanical impact, and improve the safety and reliability under abnormal gas generation, internal pressure increase, or thermal runaway conditions.

[0070] Multiple battery cells 102 serve as energy storage units for the battery device 100, used for energy storage and release. The multiple battery cells 102 are arranged adjacently along a first direction A, forming a regular arrangement. This facilitates the arrangement of the sampling circuit board 104 along the battery cell arrangement direction and allows for centralized sampling of the multiple battery cells 102 by the sampling circuit board 104. The first direction A can be the length direction of the battery device 100, the direction in which the multiple battery cells 102 are arranged sequentially, the direction of the battery module arrangement, the direction of the battery cell array, or the direction of the multiple battery cells 102 stacking. After the multiple battery cells 102 are arranged adjacently along the first direction A, the explosion-proof valves 1021 on each battery cell 102 also form a corresponding arrangement relationship with the multiple battery cells 102, thereby enabling the avoidance structure 106 to be arranged according to the position of the explosion-proof valves 1021, improving the matching between the avoidance structure 106 and the explosion-proof valves 1021.

[0071] Each battery cell 102 has an explosion-proof valve 1021 on one end surface in the second direction B. The explosion-proof valve 1021 is used to open when the internal pressure of the battery cell 102 reaches a preset opening condition, so that the gas inside the battery cell 102 can be discharged through the explosion-proof valve 1021. The second direction B can be the height direction of the battery cell 102, the main exhaust direction of the explosion-proof valve 1021, or the direction in which the end of the battery cell 102 with the explosion-proof valve 1021 points to the outside of the battery cell 102. The explosion-proof valve 1021 is located on one end surface of the battery cell 102 in the second direction B, so that the explosion-proof valve 1021 is located on the same end face of multiple battery cells 102, which facilitates the formation of a unified pressure relief direction and pressure relief space in the battery device 100. The explosion-proof valve 1021 can be an explosion-proof sheet, explosion-proof membrane, pressure relief valve, weak pressure relief area or ruptureable pressure relief structure on the top cover of the battery cell 102. The exhaust port is the opening area formed after the explosion-proof valve 1021 is opened, or it can be the pressure relief area, valve port area or preset rupture area corresponding to the explosion-proof valve 1021.

[0072] The sampling circuit board 104 is used to collect voltage signals, temperature signals, or other operating status signals from multiple battery cells 102. The sampling circuit board 104 may include an insulating substrate and conductive lines disposed on the insulating substrate. The insulating substrate may be a rigid circuit board substrate, a flexible circuit board substrate, or a rigid-flexible combined circuit board substrate, such as flame-retardant epoxy fiberglass board (FR4), polyimide substrate, epoxy fiberglass substrate, or composite insulating substrate. The conductive lines may be copper foil lines, copper-plated lines, printed lines, or embedded conductive lines. At least a portion of the sampling circuit board 104 is disposed on one side of the multiple battery cells 102 in the second direction B, so that the sampling circuit board 104 is close to the side of the multiple battery cells 102 where the explosion-proof valve 1021 is located. This facilitates the connection of the sampling circuit board 104 to the electrode terminals 1082, sampling connectors, or temperature detection devices of the battery cells 102, reduces the routing length of the sampling lines, and improves the integration and assembly convenience of the sampling structure.

[0073] The sampling circuit board 104 and the explosion-proof valve 1021 are located on the same side of the battery cell 102, allowing the sampling circuit board 104 to be centrally arranged using the space on one side of multiple battery cells 102 in the second direction B. This helps to shorten the sampling path, reduce the number of connecting harnesses and connectors, and improve the internal space utilization of the battery device 100. Since the explosion-proof valve 1021 is also located on the sampling side of the battery cell 102, the sampling circuit board 104 may overlap with the explosion-proof valve 1021 in the second direction B during arrangement. If the solid part of the sampling circuit board 104 covers the explosion-proof valve 1021, the exhaust airflow when the explosion-proof valve 1021 is open may directly impact the sampling circuit board 104, causing increased exhaust resistance or damage to the sampling circuit board 104. By providing an avoidance structure 106 on the sampling circuit board 104, the sampling circuit board 104 can avoid at least a portion of the explosion-proof valve 1021 while meeting the sampling arrangement requirements.

[0074] The clearance structure 106 is used to ensure that the physical portion of the sampling circuit board 104 avoids at least a portion of the projection range of the corresponding explosion-proof valve 1021. At least a portion of the explosion-proof valve's projection lies within the clearance structure, thereby exposing at least a portion of the corresponding explosion-proof valve 1021. The clearance structure 106 can be a through-hole penetrating the sampling circuit board 104, or a notch, slot, cutout, clearance window, clearance hole, or locally narrowed area located at the edge of the sampling circuit board 104. The shape of the clearance structure 106 can be circular, elliptical, oblong, rectangular, polygonal, waist-shaped, or an irregular shape matching the shape of the explosion-proof valve 1021. The number of clearance structures 106 can be one or more; one clearance structure 106 can correspond to one explosion-proof valve 1021, or two or more explosion-proof valves 1021; multiple clearance structures 106 can also be respectively configured to correspond one-to-one with multiple explosion-proof valves 1021. The corresponding setting can be understood as follows: when viewed along the second direction B, the projection of the avoidance structure at least partially overlaps with the projection of the explosion-proof valve, or the avoidance structure is located on the exhaust path of the explosion-proof valve.

[0075] On a plane perpendicular to the second direction B, the solid portion of the sampling circuit board 104 is located outside at least a portion of the projection range of the explosion-proof valve 1021. The solid portion of the sampling circuit board 104 can be understood as the portion of the sampling circuit board 104 that actually contains board material, conductive lines, insulating layers, pads, cover films, or other solid materials, excluding the empty area formed by the clearance structure 106. By positioning the solid portion of the sampling circuit board 104 outside the projection range of the explosion-proof valve 1021, the explosion-proof valve 1021 can form at least a partially unobstructed exhaust channel in the second direction B, facilitating the determination of whether the explosion-proof valve 1021 is obstructed along the projection of the second direction B.

[0076] At least a portion of the explosion-proof valve 1021 is exposed, meaning that at least a portion of the explosion-proof valve 1021 in the second direction B is not covered by the solid portion of the sampling circuit board 104. The explosion-proof valve 1021 can be fully or partially exposed. When the explosion-proof valve 1021 is fully exposed, the gas released after the explosion-proof valve 1021 is opened can be discharged more directly along the second direction B. When the explosion-proof valve 1021 is partially exposed, even if the sampling circuit board 104 retains a portion of the solid area near the explosion-proof valve 1021 due to wiring or structural strength requirements, the exposed portion can still provide a channel for gas discharge, reducing exhaust resistance compared to a structure where the explosion-proof valve 1021 is completely covered. The clearance structure 106 can both meet the pressure relief requirements of the explosion-proof valve 1021 and take into account the wiring space and structural integrity of the sampling circuit board 104.

[0077] Optionally, the clearance structure 106 can be correspondingly configured to at least a portion of the explosion-proof valves 1021 located in the middle region of the plurality of battery cells 102, exposing at least a portion of the plurality of explosion-proof valves 1021 located in the middle region. Since the sampling circuit board 104 typically extends along the first direction A and covers the top region of the plurality of battery cells 102, the explosion-proof valves 1021 in the middle region are more easily blocked by the solid portion of the sampling circuit board 104. Therefore, by providing the corresponding clearance structure 106, the exhaust resistance when the plurality of explosion-proof valves 1021 depressurize simultaneously or sequentially can be reduced, thereby improving the overall depressurization capability of the battery device 100.

[0078] Optionally, the sampling circuit board 104 may include a main board area for carrying sampling lines and a line aggregation area for aggregating sampling signals. The main board area may extend along a first direction A to correspond to multiple battery cells 102; the line aggregation area may be located at one end of the main board area in the first direction A, or in the middle or side of the main board area, for setting up aggregation terminals 1045, connectors, pads, or interfaces for connection with the battery management system. The avoidance structure 106 may be set in the main board area, the line aggregation area, or both. Through the above settings, the sampling circuit board 104 can partially or completely avoid the explosion-proof valve 1021 while realizing signal acquisition and signal aggregation, reducing the risk that the line aggregation area will completely block the explosion-proof valve 1021 due to the need for a large wiring area.

[0079] Optionally, at one end of the sampling circuit board 104 (typically the end that needs to aggregate output signals and connect to the battery management system (BMS) communication board), due to the need to arrange wider lines such as the main power line and communication lines, the physical portion may extend to the top of the first (or last) battery cell, thus partially obscuring the explosion-proof valve on top of the cell. To reduce the risk of severely affecting pressure relief, the wiring layout in this area should be optimized to minimize the obstructed area. Optionally, the obstructed portion should not exceed 20% to 30% of the explosion-proof valve area. In some embodiments, this range allows the high-pressure airflow during emergency pressure relief to effectively tear the valve diaphragm and discharge smoothly, with minimal impact on the overall pressure relief capacity.

[0080] Optionally, there may be a gap between the clearance structure 106 and the explosion-proof valve 1021. In a plane perpendicular to the second direction B, the edge of the clearance structure 106 may be located outside the edge of the explosion-proof valve 1021, making the size of the clearance structure 106 larger than the size of the explosion-proof valve 1021. A preset distance may be formed between the edge of the clearance structure 106 and the edge of the explosion-proof valve 1021, for example, 0.5mm to 5mm, 1mm to 3mm, or not less than 1mm. By setting the gap, the risk of the clearance structure 106 deviating from the explosion-proof valve 1021 due to assembly tolerances, cell dimensional tolerances, or positioning deviations of the sampling circuit board 104 can be reduced, ensuring that the explosion-proof valve 1021 remains at least partially exposed in the actual assembled state. At the same time, the size of the clearance structure 106 should not be too large to avoid excessively weakening the structural strength of the sampling circuit board 104 or affecting the arrangement of conductive lines.

[0081] Optionally, the physical portion of the sampling circuit board 104 may be located outside the projection range of only some of the explosion-proof valves 1021, or it may be located outside the projection range of all the explosion-proof valves 1021. When the physical portion of the sampling circuit board 104 is outside the projection range of all the explosion-proof valves 1021, at least a portion of all the explosion-proof valves 1021 can be exposed, thereby further improving the pressure relief capability of the battery device 100. When the sampling circuit board 104 is limited by wiring layout, connector installation, or structural support requirements and cannot fully expose all the explosion-proof valves 1021, at least a portion of the explosion-proof valves 1021 can be exposed through the avoidance structure 106 to preferentially reduce the impact of the sampling circuit board 104 on the main exhaust area or easily obstructed areas.

[0082] Optionally, the sampling circuit board 104 can be offset relative to the explosion-proof valve 1021, so that the main body of the sampling circuit board 104 is located on one side of the explosion-proof valve 1021. In this case, the clearance structure 106 can be formed by the clearance space between the edge of the sampling circuit board 104 and the explosion-proof valve 1021, or by a notch or slot on the edge of the sampling circuit board 104. By offsetting the sampling circuit board 104, the overlap area between the solid part of the sampling circuit board 104 and the projected area of ​​the explosion-proof valve 1021 can be further reduced, allowing the explosion-proof valve 1021 to obtain a larger exposed area. The above structure is suitable for situations where the number of sampling lines is small, the width of the sampling circuit board 104 is small, or the battery device 100 has sufficient arrangement space on one side of the explosion-proof valve 1021.

[0083] Optionally, the sampling circuit board 104 can be electrically connected to the battery cell 102 via a sampling connector. The sampling connector can be a nickel sheet, aluminum sheet, copper sheet, copper-aluminum composite sheet, busbar, flexible connector, or conductive terminal. One end of the sampling connector can be electrically connected to the electrode terminal 1082, and the other end can be electrically connected to the sampling line on the sampling circuit board 104. The electrical connection method can be welding, riveting, crimping, screwing, plugging, conductive adhesive bonding, or embedded molding. Through the above connection relationship, the sampling circuit board 104 can stably acquire the voltage signal or other electrical signals from the battery cell 102. The sampling connector and the sampling circuit board 104 can form an integrated structure, thereby reducing the number of additional wiring harnesses and connectors, reducing contact resistance and connection failure points, and improving assembly efficiency and electrical reliability.

[0084] Optionally, a buffer 110 may be provided between the sampling circuit board 104 and the multiple battery cells 102. The buffer 110 may be located on the side of the sampling circuit board 104 facing the battery cells 102, and is used to provide buffering, insulation, support, or gap compensation between the sampling circuit board 104 and the battery cells 102. The buffer 110 may be foam, silicone pad, rubber pad, insulating pad, flame-retardant pad, elastic pad, or composite buffer pad, and the material may include silicone foam, polyurethane foam, EPDM rubber, mica composite material, or flame-retardant insulating material. By providing the buffer 110, the risk of wear, cracking, or solder joint damage caused by hard contact between the sampling circuit board 104 and the battery cells 102 under vehicle driving, handling, or vibration environments can be reduced, and the assembly tolerance between the battery cells 102 and the sampling circuit board 104 can be compensated, thereby improving the fixation stability of the sampling circuit board 104.

[0085] Optionally, a buffer pad, serving as a buffer component 110, is provided between the bottom surface of the sampling circuit board and the top surface of the battery cell. The buffer pad can be made of elastic foam (such as silicone foam or polyurethane foam) with insulating, flame-retardant, and high-temperature resistant properties, with a thickness of approximately 0.5mm-2mm. The buffer pad is fixed by adhesive or snap-fit ​​methods, absorbing vibrations and impacts generated during vehicle travel or transportation, preventing hard collisions between the sampling circuit board and the battery cell from causing solder joint cracking or circuit damage; in addition, it can fill the assembly gap between the two, compensate for manufacturing and installation tolerances, and make the structure more stable; it is understood that the buffer pad also provides a certain degree of heat insulation.

[0086] Optionally, the buffer 110 may also be provided with a buffer clearance structure 1102 corresponding to the explosion-proof valve 1021. The buffer clearance structure 1102 may be a through hole, notch, slot, hollow area, or clearance groove. By providing a buffer clearance structure 1102 on the buffer 110, the risk of the buffer 110 covering the explosion-proof valve 1021 can be reduced, preventing the sampling circuit board 104 from clearing the explosion-proof valve 1021 through the clearance structure 106 while the buffer 110 still obstructs the explosion-proof valve 1021. The clearance structure 106 of the sampling circuit board 104 and the buffer clearance structure 1102 of the buffer 110 can jointly form an exhaust channel, allowing the gas after the explosion-proof valve 1021 is opened to be discharged outward through the explosion-proof valve 1021, improving the continuity and reliability of the pressure relief path.

[0087] Optionally, the clearance structure 106 may at least partially overlap with the explosion-proof valve 1021 in the second direction B. At least partial overlap can be understood as an overlap between the projection of the clearance structure 106 and the projection of the explosion-proof valve 1021 on a plane perpendicular to the second direction B. The larger the overlap area, the larger the exposed area of ​​the explosion-proof valve 1021, and the smaller the exhaust resistance. Depending on the wiring requirements of the sampling circuit board 104, the projection of the clearance structure 106 may cover the entire area of ​​the explosion-proof valve 1021's projection, or it may cover only a portion of the projection area. When the projection of the clearance structure 106 covers the entire area of ​​the explosion-proof valve 1021's projection, the solid portion of the sampling circuit board 104 essentially does not obstruct the explosion-proof valve 1021; when the projection of the clearance structure 106 covers only a portion of the projection area of ​​the explosion-proof valve 1021, the explosion-proof valve 1021 can still release pressure through its exposed portion, making it suitable for areas with high wiring convergence or structural support requirements.

[0088] Optionally, the conductive lines on the sampling circuit board 104 can be arranged to avoid the edge of the avoidance structure 106, or to run around the periphery of the avoidance structure 106. The conductive lines may include voltage sampling lines, temperature sampling lines, equalization lines, communication lines, or power supply lines. By making the conductive lines bypass the avoidance structure 106, the risk of the avoidance structure 106 weakening the electrical connection function of the sampling circuit board 104 can be reduced; by rationally arranging the conductive lines around the periphery of the avoidance structure 106, the wiring utilization rate of the sampling circuit board 104 can be improved while preserving the exposed space of the explosion-proof valve 1021. Optionally, a reinforcing area 1048, reinforcing sheets, an insulating protective layer, or a flame-retardant protective layer may also be provided around the avoidance structure 106 to improve the structural strength and heat resistance of the sampling circuit board 104 near the avoidance structure 106.

[0089] The battery device 100 can be applied to power battery packs, energy storage battery packs, vehicle battery systems, energy storage cabinets, power tool batteries, marine battery systems, or other electrical equipment 300 battery systems. Because a clear avoidance and cooperation relationship is formed between the sampling circuit board 104, the avoidance structure 106, and the explosion-proof valve 1021, the battery device 100 can be adapted to different cell 102 specifications, different explosion-proof valve 1021 shapes, and different sampling circuit board 104 wiring schemes. By adjusting the shape, quantity, size, and position of the avoidance structure 106, the avoidance requirements under different explosion-proof valve 1021 arrangement methods can be met.

[0090] Combination Figure 2 and Figure 3 In some embodiments, the sampling circuit board 104 includes a first board body 1042 and a second board body 1044 connected together. The second board body 1044 is disposed at one end of the first board body 1042 in a first direction A. The first board body 1042 extends along the first direction A, and a portion of the second board body 1044 is located on one side of the battery cell 102 in a second direction B, and a portion of the second board body 1044 is located on one side of the battery cell 102 in the first direction A.

[0091] By dividing the sampling circuit board 104 into a first board 1042 and a second board 1044, the first board 1042 can mainly undertake the functions of signal acquisition and line extension along the arrangement direction of multiple cells 102, while the second board 1044 can mainly undertake the functions of sampling signal aggregation, terminal setting, connector arrangement or connection with an external battery management system. This allows the sampling area and the aggregation area to cooperate with each other in structure and function, reducing the risk of line crossing and centralized stacking.

[0092] The first plate 1042 extends along the first direction A, allowing it to be arranged correspondingly to a plurality of battery cells 102 arranged adjacent to each other along the first direction A. The first plate 1042 may span across one side of the plurality of battery cells 102 in the second direction B, or may at least partially cover the area of ​​one side of the plurality of battery cells 102 in the second direction B. Since the plurality of battery cells 102 are arranged along the first direction A, the extension of the first plate 1042 along the first direction A can shorten the sampling connection distance between the first plate 1042 and each battery cell 102, allowing voltage sampling lines, temperature sampling lines, or other signal sampling lines 1041 to be connected to the corresponding battery cells 102 along a shorter path, reducing sampling line detours, improving the regularity of sampling line arrangement, and reducing problems such as increased resistance, signal interference, or increased assembly complexity caused by excessively long lines.

[0093] The second board 1044 is located at one end of the first board 1042 in the first direction A, allowing the sampling lines of each cell 102 to converge along the first board 1042 towards the end in the first direction A, and to be centrally connected at the second board 1044 to the convergence terminal 1045, connector, pad, pin header, flexible connection terminal, or external connection structure. This arrangement creates a line path where the first board 1042 collects data and the second board 1044 outputs data, facilitating unified signal extraction and connection of the second board 1044 to the battery management system, sampling adapter board, or external wiring harness. Since the second board 1044 is located at one end of the first board 1042 in the first direction A, it is not dispersed among multiple cells 102, reducing the number of connectors and external connection points, improving assembly efficiency and maintenance convenience.

[0094] A portion of the second board 1044 is located on one side of the battery cell 102 in the second direction B, allowing the second board 1044 to transition continuously with the first board 1042 in space. It also allows for the use of the top space on the side of the battery cell 102 equipped with the explosion-proof valve 1021 for line aggregation and terminal arrangement. This portion of the second board 1044 can support multiple sampling lines, bus lines, communication lines, or power supply lines extending from the first board 1042, and can also be equipped with connectors, pads, reinforcement areas, or terminal mounting areas. By positioning a portion of the second board 1044 on one side of the battery cell 102 in the second direction B, the risk of the sampling circuit board 104 becoming excessively long or insufficiently supported due to the second board 1044 being completely suspended outside the battery cell 102 can be reduced, while simultaneously improving the overall compactness of the sampling circuit board 104.

[0095] A portion of the second board 1044 is located on one side of the battery cell 102 in the first direction A, allowing the second board 1044 to extend outward from the end areas of multiple battery cells 102, providing greater layout space for line aggregation, connector installation, or external wiring harness insertion. Since the second board 1044 typically needs to aggregate multiple sampling lines, the required board area and wiring width may be larger than a local area of ​​the first board 1042. By placing a portion of the second board 1044 on one side of the battery cell 102 in the first direction A, a portion of the aggregation lines, connection terminals, or connectors can be arranged in the outer area of ​​the battery cell 102 end, reducing the occupation of the top space of the battery cell 102 on the second direction B side, thereby reducing the risk of the second board 1044 obstructing the explosion-proof valve 1021.

[0096] Optionally, the second plate 1044 can be bent, widened, or laterally extended relative to the first plate 1042, such that a portion of the second plate 1044 is located on one side of the cell 102 in the second direction B, and a portion of the second plate 1044 is located on one side of the cell 102 in the first direction A. The second plate 1044 can be integrally formed with the first plate 1042, or it can be electrically connected to the first plate 1042 by welding, plugging, pressing, riveting, flexible connecting segments, or connecting terminals. Integral forming can reduce the number of connection interfaces, improve overall strength and electrical connection reliability; connecting through a connecting structure can improve the arrangement flexibility of the second plate 1044, making it easier to adapt to the internal space of different battery devices 100.

[0097] Optionally, the second board 1044 may include a first converging section and a second converging section. The first converging section is located on one side of the battery cell 102 in the second direction B, and the second converging section is located on one side of the battery cell 102 in the first direction A. The first converging section can be used to receive the sampling lines on the first board 1042, allowing the sampling lines to smoothly transition from the first board 1042 to the second board 1044. The second converging section can be used to house connectors, converging terminals 1045, pads, external interfaces, or reinforcing structures. By setting the first and second converging sections, the line transition area and the terminal connection area can be arranged in separate zones, reducing the occupation of the terminal connection area on the top venting area of ​​the battery cell 102 and improving the assemblability of the second board 1044.

[0098] Optionally, the portion of the second plate 1044 located on the side of the battery cell 102 in the second direction B may be provided with a clearance structure 106. The clearance structure 106 is correspondingly provided with the explosion-proof valve 1021 adjacent to the second plate 1044, so that at least a portion of the explosion-proof valve 1021 is exposed. Since the second plate 1044 needs to accommodate more lines or connection terminals, its solid portion may have a larger width or area than the first plate 1042. Therefore, providing the clearance structure 106 at the position of the second plate 1044 corresponding to the explosion-proof valve 1021 can reduce the obstruction of the explosion-proof valve 1021 by the second plate 1044. The portion of the second plate 1044 located on the side of the battery cell 102 in the first direction A can be used more to accommodate the assembly terminal 1045 or connector, thereby further reducing the area of ​​the second plate 1044 located on the side of the battery cell 102 in the second direction B.

[0099] Combination Figure 1 and Figure 3 In some embodiments, the avoidance structure 106 includes a first avoidance structure 1062. The first avoidance structure 1062 is disposed on the first plate 1042 and is a through hole penetrating the first plate 1042. The first avoidance structure 1062 is correspondingly disposed with a plurality of explosion-proof valves 1021 so that at least a portion of the plurality of explosion-proof valves 1021 is exposed.

[0100] The first plate 1042 extends along the first direction A and is arranged corresponding to a plurality of battery cells 102 arranged adjacent to each other along the first direction A. The plurality of explosion-proof valves 1021 on the battery cells 102 can also form a corresponding explosion-proof valve 1021 arrangement area along the first direction A. By providing a first clearance structure 1062 on the first plate 1042 and aligning the first clearance structure 1062 with the plurality of explosion-proof valves 1021, a through clearance space can be formed on the first plate 1042 at the position corresponding to the explosion-proof valve 1021, thereby reducing the obstruction of the plurality of explosion-proof valves 1021 by the solid portion of the first plate 1042.

[0101] The first clearance structure 1062 is a through hole penetrating the first plate 1042, meaning that the first clearance structure 1062 extends through the first plate 1042 along its thickness direction. The thickness direction of the first plate 1042 can be consistent with the second direction B, or it can extend approximately along the second direction B. Since the first clearance structure 1062 penetrates the first plate 1042, when the explosion-proof valve 1021 is opened, the gas discharged by the explosion-proof valve 1021 can be discharged outward through the corresponding space of the through hole without breaking through or bypassing the solid part of the first plate 1042. This reduces the exhaust resistance after the explosion-proof valve 1021 is opened, reduces the risk of high-temperature and high-pressure gas directly impacting the first plate 1042, causing the first plate 1042 to crack, warp, burn, have broken circuits, or fail solder joints, and improves the reliability of pressure relief under abnormal pressure conditions.

[0102] The first clearance structure 1062 is correspondingly arranged with multiple explosion-proof valves 1021. One first clearance structure 1062 can simultaneously correspond to multiple explosion-proof valves 1021, or multiple first clearance structures 1062 can be arranged one-to-one with multiple explosion-proof valves 1021. For example, the first clearance structure 1062 can be an elongated through-hole extending along the first direction A, simultaneously corresponding to two, three, or more explosion-proof valves 1021; the first clearance structure 1062 can also include multiple spaced-apart circular through-holes, elliptical through-holes, oblong through-holes, rectangular through-holes, polygonal through-holes, or irregularly shaped through-holes, each through-hole corresponding to one explosion-proof valve 1021. Through different forms of the first clearance structure 1062, the clearance area of ​​the first plate 1042 can be flexibly set according to the actual shape, size, and arrangement spacing of the multiple explosion-proof valves 1021.

[0103] On a plane perpendicular to the second direction B, the projection of the first clearance structure 1062 can at least partially overlap with the projections of multiple explosion-proof valves 1021, thereby exposing at least a portion of the multiple explosion-proof valves 1021. The projection of the first clearance structure 1062 can also cover the entire projected area of ​​the corresponding explosion-proof valve 1021, thus essentially exposing the corresponding explosion-proof valve 1021 completely. For areas with high exhaust safety requirements, the size of the first clearance structure 1062 can be larger than the size of the corresponding explosion-proof valve 1021, and the edge of the first clearance structure 1062 can be located outside the edge of the corresponding explosion-proof valve 1021, so that even with assembly tolerances, manufacturing tolerances, or positioning deviations, at least a portion of the corresponding explosion-proof valve 1021 remains exposed. For areas with high wiring density on the first plate 1042, the first clearance structure 1062 can only partially overlap with the corresponding explosion-proof valve 1021, thereby reserving a physical area for conductive line routing, pad placement, or structural reinforcement while retaining the exhaust channel.

[0104] After the first avoidance structure 1062 is provided on the first plate 1042, the conductive lines of the first plate 1042 can be arranged around the periphery of the first avoidance structure 1062. The conductive lines may include voltage sampling lines, temperature sampling lines, equalization lines, communication lines, or power supply lines. By making the conductive lines bypass the first avoidance structure 1062, the risk of through holes disrupting the continuity of the conductive lines can be reduced, and the first plate 1042 can still have the function of sampling signal transmission while avoiding the explosion-proof valve 1021. Optionally, an insulating protective layer, a flame-retardant protective layer, a reinforcing structure, or a rounded corner transition structure may also be provided around the periphery of the first avoidance structure 1062 to reduce the risk of stress concentration, crack propagation, or insulation failure of the first plate 1042 at the edge of the first avoidance structure 1062.

[0105] like Figure 1 and Figure 3 As shown, in some embodiments, one of the multiple battery cells 102 located at one end in the first direction A is the end battery cell 1024, and the avoidance structure 106 includes a second avoidance structure 1064. The second avoidance structure 1064 is disposed on the second plate 1044, and the second plate 1044 overlaps with the projection portion of the explosion-proof valve 1021 of the end battery cell 1024 in the second direction B. The second avoidance structure 1064 is correspondingly disposed with the explosion-proof valve 1021 of the end battery cell 1024 so that at least a portion of the explosion-proof valve 1021 of the end battery cell 1024 is exposed.

[0106] The terminal cell 1024 can be understood as the cell 102 located at the end position among a plurality of adjacent cells 102 arranged along the first direction A, such as the cell 102 located at the forward end of the first direction A, or the cell 102 located at the reverse end of the first direction A. Since the second plate 1044 is disposed at one end of the first plate 1042 in the first direction A, the second plate 1044 is usually disposed adjacent to or corresponding to the terminal cell 1024. Therefore, the second plate 1044 may overlap with the projection portion of the explosion-proof valve 1021 of the terminal cell 1024 in the second direction B. By defining the terminal cell 1024, the position of the explosion-proof valve 1021 corresponding to the second plate 1044 can be clearly defined.

[0107] The second clearance structure 1064 is correspondingly provided with the explosion-proof valve 1021 of the end cell 1024, so that at least a portion of the explosion-proof valve 1021 of the end cell 1024 is exposed. Since the second board 1044 needs to aggregate multiple sampling lines from the first board 1042 and may include aggregation terminals 1045, connectors, pads, reinforcement areas, or external connection interfaces, the second board 1044 typically has a large board area or high wiring density. When the second board 1044 is adjacent to the end cell 1024, the solid portion of the second board 1044 may not be able to completely avoid the explosion-proof valve 1021 of the end cell 1024. By providing the second clearance structure 1064 on the second board 1044, venting space can be reserved for the explosion-proof valve 1021 of the end cell 1024 while meeting the routing and connection requirements of the second board 1044.

[0108] The second clearance structure 1064 can be a through hole penetrating the second plate 1044, or it can be a notch, slot, hollow area, clearance window, clearance hole, or locally narrowed area provided on the edge of the second plate 1044. The shape of the second clearance structure 1064 can be circular, elliptical, oblong, rectangular, polygonal, waist-shaped, or an irregular shape that matches the shape of the explosion-proof valve 1021 of the end cell 1024. The second clearance structure 1064 can at least partially overlap with the projection of the explosion-proof valve 1021 of the end cell 1024 on a plane perpendicular to the second direction B, or it can cover the entire projection area of ​​the explosion-proof valve 1021 of the end cell 1024. With the above structure, the second clearance structure 1064 can reduce the obstruction of the explosion-proof valve 1021 of the end cell 1024 by the solid part of the second plate 1044, so that after the explosion-proof valve 1021 of the end cell 1024 is opened, gas can be discharged through the at least partially exposed explosion-proof valve 1021.

[0109] Optionally, the second clearance structure 1064 can be larger than the size of the explosion-proof valve 1021 of the end cell 1024, so that the edge of the second clearance structure 1064 is located outside the edge of the explosion-proof valve 1021 of the end cell 1024. Even if there is a positional deviation between the end cell 1024, the second board 1044, or the sampling circuit board 104 during assembly, the second clearance structure 1064 can still maintain a corresponding relationship with the explosion-proof valve 1021 of the end cell 1024, so that at least a part of the explosion-proof valve 1021 is exposed. Optionally, the second clearance structure 1064 can also correspond only to a part of the explosion-proof valve 1021 of the end cell 1024, so as to reserve a physical arrangement area for sampling lines, communication lines, power supply lines, connector pads, or reinforcement structures in the second board 1044 while retaining a certain venting area.

[0110] The second clearance structure 1064 is disposed behind the second plate 1044, and the conductive lines in the second plate 1044 can run around the periphery of the second clearance structure 1064. The conductive lines may include voltage sampling lines, temperature sampling lines, equalization lines, communication lines, power supply lines, or signal aggregation lines. Since the wiring density of the second plate 1044 is usually higher than that of the first plate 1042, the second clearance structure 1064 needs to take into account both the exposed area of ​​the explosion-proof valve 1021 and the wiring space of the second plate 1044. By arranging the conductive lines around the periphery of the second clearance structure 1064, the risk of the second clearance structure 1064 disrupting the electrical connection continuity of the second plate 1044 can be reduced, while the second plate 1044 provides partial clearance to the explosion-proof valve 1021 of the end cell 1024. Optionally, reinforcing sheets, insulating protective layers, flame-retardant protective layers, or rounded corner transition structures may be provided around the second clearance structure 1064 to improve the mechanical strength and heat resistance reliability of the second plate 1044 near the second clearance structure 1064.

[0111] The first clearance structure 1062 and the second clearance structure 1064 can cooperate with each other. The first clearance structure 1062 is used to expose at least a portion of the multiple explosion-proof valves 1021 corresponding to the first plate 1042, and the second clearance structure 1064 is used to expose at least a portion of the explosion-proof valves 1021 of the terminal cell 1024. Since the first plate 1042 and the second plate 1044 perform different functions in the sampling circuit board 104, the first plate 1042 focuses more on extending the sampling line along the first direction A, and the second plate 1044 focuses more on the convergence of multiple lines and external connections. Therefore, the first clearance structure 1062 and the second clearance structure 1064 can be designed separately according to the structural requirements of different areas. Through the above cooperation, the sampling circuit board 104 can avoid the explosion-proof valves 1021 in different functional areas, thereby improving the venting reliability of multiple cells 102 and the terminal cell 1024, and improving the overall safety of the battery device 100.

[0112] Combination Figure 1 , Figure 2 and Figure 4 In some embodiments, the second plate 1044 covers a portion of the explosion-proof valve 1021 of the end cell 1024, and the projected area of ​​the covered portion on a plane perpendicular to the second direction B is less than or equal to 30% of the projected area of ​​the explosion-proof valve 1021 on the aforementioned plane.

[0113] It can be understood that the plane perpendicular to the second direction B is... Figure 1 The observation direction shown. When observed along the second direction B, the solid portion of the second plate 1044 may partially overlap with the explosion-proof valve 1021 of the terminal cell 1024, but the coverage area corresponding to the overlapping area is limited to within 30% of the projected area of ​​the explosion-proof valve 1021. The second plate 1044 can retain the necessary board area for arranging sampling lines, collection lines, connection terminals, pads or connectors, while reducing the risk of excessive obstruction of the explosion-proof valve 1021 of the terminal cell 1024, thus balancing the electrical layout requirements of the second plate 1044 and the pressure relief and venting requirements of the terminal cell 1024.

[0114] The covered portion is the area where the projection of the solid portion of the second plate 1044 overlaps with the projection of the explosion-proof valve 1021 of the terminal cell 1024 on a plane perpendicular to the second direction B. The solid portion of the second plate 1044 may include an insulating substrate, conductive lines, solder pads, reinforcing sheets, a cover film, a connector mounting area, or other solid material portions. The projected area of ​​the explosion-proof valve 1021 can be determined based on the boundary of the explosion-proof valve 1021, for example, based on the contour of the opening area, pressure relief opening area, valve port edge, or preset rupture area of ​​the explosion-proof valve 1021 on a plane perpendicular to the second direction B. By using the plane perpendicular to the second direction B as the projection reference, the proportion of obstruction of the explosion-proof valve 1021 by the second plate 1044 can be clearly determined, facilitating structural design, assembly testing, and product comparison.

[0115] By limiting the projected area of ​​the covered portion to less than or equal to 30% of the projected area of ​​the explosion-proof valve 1021, at least 70% of the projected area of ​​the explosion-proof valve 1021 remains uncovered by the solid portion of the second plate 1044. When the internal pressure of the terminal cell 1024 increases and triggers the opening of the explosion-proof valve 1021, the explosion-proof valve 1021 still has a large exposed area, allowing high-temperature and high-pressure gas to escape through the exposed area. This reduces the risk of increased exhaust resistance, delayed pressure relief, or abnormal airflow deflection caused by the second plate 1044 obstructing the explosion-proof valve 1021. Simultaneously, since the second plate 1044 only covers a portion of the explosion-proof valve 1021, the airflow when the explosion-proof valve 1021 opens does not need to completely impact the solid portion of the second plate 1044, which helps reduce the possibility of warping, cracking, burning, circuit breakage, or solder joint failure of the second plate 1044.

[0116] Since the second board 1044 is located at one end of the first board 1042 in the first direction A and is used to gather sampling lines from multiple cells 102, the second board 1044 typically requires a larger wiring area and terminal arrangement area than a local area of ​​the first board 1042. If the second board 1044 is required to completely avoid the explosion-proof valve 1021 of the end cell 1024, it may result in an increased external dimension of the second board 1044, an increased overall length of the sampling circuit board 104, difficulties in connector arrangement, or complex wiring routing. By allowing the second board 1044 to cover a portion of the explosion-proof valve 1021 of the end cell 1024, and controlling the coverage ratio to less than or equal to 30%, the necessary physical area for the second board 1044 can be reserved within a limited space, while keeping most of the explosion-proof valve 1021 exposed, thereby improving the space utilization and structural feasibility of the battery device 100.

[0117] Optionally, the projected area of ​​the covered portion can be less than or equal to 25%, 20%, 15%, or 10% of the projected area of ​​the explosion-proof valve 1021. A smaller coverage ratio results in a larger exposed area of ​​the explosion-proof valve 1021 on the end cell 1024, and generally lower exhaust resistance. When the coverage ratio is appropriately increased, the physical area of ​​the second plate 1044 available for arranging wiring, pads, or connectors increases accordingly. Therefore, a suitable coverage ratio can be selected within a range of less than or equal to 30%, based on the size of the explosion-proof valve 1021 on the end cell 1024, the wiring density of the second plate 1044, the connector location, the number of sampling lines, and the internal space conditions of the battery device 100.

[0118] Optionally, when the second plate 1044 covers a portion of the explosion-proof valve 1021 of the terminal cell 1024, the second clearance structure 1064 can be configured to correspond to the uncovered portion of the explosion-proof valve 1021, or it can overlap with the overall outline of the explosion-proof valve 1021. The second clearance structure 1064 can be a through hole, notch, slot, hollow area, clearance window, or clearance hole. By coordinating the second clearance structure 1064 with the coverage ratio, although the second plate 1044 may partially overlap with the explosion-proof valve 1021, it still forms an exhaust channel through the second clearance structure 1064, exposing at least a portion of the explosion-proof valve 1021 of the terminal cell 1024. Optionally, the sampling lines, communication lines, power supply lines, or collection lines in the second plate 1044 can bypass the second clearance structure 1064 to complete line collection without expanding the coverage area.

[0119] Optionally, the second plate 1044 covers a portion of the explosion-proof valve 1021 of the terminal cell 1024. This can be achieved by the edge region of the second plate 1044 covering the edge portion of the explosion-proof valve 1021, or by a partial bridging region of the second plate 1044 near the second clearance structure 1064 covering a partial area of ​​the explosion-proof valve 1021. The second plate 1044 may not cover the central area of ​​the explosion-proof valve 1021, or it may expose at least part of the central area of ​​the explosion-proof valve 1021 to allow for smoother discharge of the main exhaust airflow during the initial opening of the explosion-proof valve 1021. By placing the covered area close to the edge of the explosion-proof valve 1021, the impact of the second plate 1044 on the main exhaust channel can be reduced, while retaining the edge support or wiring function of the second plate 1044.

[0120] Combination Figure 3 In some embodiments, the end of the second plate 1044 away from the first plate 1042 is provided with a collection terminal 1045, and the sampling circuit board 104 is provided with a plurality of sampling lines 1041. One end of the sampling line 1041 is used to connect to the battery cell 102, and the other end of the sampling line 1041 is connected to the collection terminal 1045.

[0121] Multiple sampling lines 1041 can guide the voltage signals, temperature signals or other status signals of multiple cells 102 to the second board 1044, and output them centrally through the converging terminal 1045 at the end of the second board 1044 away from the first board 1042, thereby forming a signal transmission path from the cell 102 to the sampling line 1041, from the sampling line 1041 to the converging terminal 1045, and then from the converging terminal 1045 to the external control unit or battery management system.

[0122] A converging terminal 1045 is provided at the end of the second plate 1044 away from the first plate 1042, allowing the converging terminal 1045 to be arranged in the end region of the second plate 1044. Since the second plate 1044 is located at one end of the first plate 1042 in the first direction A, and a portion of the second plate 1044 can be located on one side of the battery cell 102 in the first direction A, placing the converging terminal 1045 at the end of the second plate 1044 away from the first plate 1042 helps to keep the converging terminal 1045 away from the area of ​​the multiple explosion-proof valves 1021 corresponding to the first plate 1042, reducing the obstruction of the exhaust path of the explosion-proof valves 1021 by the converging terminal 1045, connectors, or external wiring harnesses. Simultaneously, the location of the converging terminal 1045 at the end of the second plate 1044 also facilitates the insertion or assembly of external wiring harnesses, connectors, adapters, or battery management system connectors from the end of the battery device 100, thereby improving assembly convenience and subsequent maintenance convenience.

[0123] The aggregation terminal 1045 is used to aggregate and output signals transmitted by multiple sampling lines 1041. The aggregation terminal 1045 can be a pad, plug-in terminal, pin header, connector terminal, flexible board connection terminal, gold finger, board-to-board connection terminal, or wire-to-board connection terminal. The aggregation terminal 1045 can be electrically connected to a battery management system, a battery management system sampling board, a sampling adapter board, an external wiring harness, or a communication connector. By setting the aggregation terminal 1045, multiple sampling lines 1041 that are scattered across multiple battery cells 102 can be concentrated into one or a few output locations, reducing the number of external wiring points, lowering connection complexity, and improving the regularity and reliability of the sampled signal output.

[0124] The sampling circuit board 104 has multiple sampling lines 1041. These sampling lines 1041 can be disposed on the surface of the sampling circuit board 104, in an inner layer of the sampling circuit board 104, or in different conductive layers of the sampling circuit board 104. The sampling lines 1041 can be copper foil lines, printed conductive lines, copper-plated lines, flexible conductive lines, or embedded conductive lines. The multiple sampling lines 1041 can include voltage sampling lines, temperature sampling lines, equalization lines, communication lines, power supply lines, or status detection lines. By integrating multiple sampling lines 1041 onto the sampling circuit board 104, the number of traditional wiring harnesses can be reduced, the risk of wiring harness crossing, tangling, misconnection, or vibration wear can be reduced, and the internal wiring layout of the battery device 100 can be improved.

[0125] One end of the sampling line 1041 is used to connect to the battery cell 102, enabling the sampling line 1041 to acquire sampling signals from the corresponding battery cell 102. One end of the sampling line 1041 can be directly connected to the electrode terminal 1082, or indirectly connected to the battery cell 102 through a conductive connector 1084, nickel sheet, aluminum sheet, copper sheet, busbar, sampling terminal, solder pad, or temperature sensing element. The connection method can be welding, riveting, crimping, screwing, plugging, laser welding, resistance welding, ultrasonic welding, conductive adhesive bonding, or elastic contact connection. Through this connection, the sampling line 1041 can form a stable electrical or signal connection with the battery cell 102, thereby acquiring voltage, temperature, or other operating status information of the battery cell 102.

[0126] The other end of the sampling line 1041 is connected to the collection terminal 1045, so that the signals collected by the multiple sampling lines 1041 can be collected along the sampling circuit board 104 to the end of the second board 1044 away from the first board 1042. Since the first board 1042 extends along the first direction A and is arranged corresponding to multiple battery cells 102, the multiple sampling lines 1041 can extend from the corresponding position of each battery cell 102 along the first board 1042 to the second board 1044, and then be collected in the second board 1044 to the collection terminal 1045. The above-mentioned routing makes the arrangement path of the sampling lines 1041 clearer, facilitates the collection and output of the sampling signals of different battery cells 102 in a predetermined order, reduces the risk of sampling line crossing and misconnection, and helps the battery management system to identify and monitor multiple battery cells 102 one by one.

[0127] Optionally, multiple sampling lines 1041 can be arranged at intervals along the extension direction of the first plate 1042 and gradually converge near the second plate 1044. For the battery cell 102 near the second plate 1044, the sampling line 1041 can have a shorter extension path; for the battery cell 102 far from the second plate 1044, the sampling line 1041 can extend a longer distance along the first plate 1042 before connecting to the converging terminal 1045. By uniformly setting the converging terminal 1045 at the end of the second plate 1044 away from the first plate 1042, sampling lines 1041 of different lengths can be arranged according to a predetermined path, which facilitates the formation of a regular wiring layout on the sampling circuit board 104. Optionally, the sampling line 1041 can avoid the first avoidance structure 1062 and the second avoidance structure 1064 through vias, cross-layer wiring, layered wiring, or bypass wiring to reduce the risk of the sampling line 1041 passing through the avoidance structure 106 and affecting the exposure of the explosion-proof valve 1021.

[0128] Optionally, a reinforcing structure, an insulating protection structure, or a positioning structure can be provided in the area where the collection terminal 1045 is located. The reinforcing structure can be a reinforcing plate, a thickened substrate, a local reinforcing layer, a metal reinforcing sheet, or a plastic support component, used to improve the mechanical strength of the area where the collection terminal 1045 is located, reducing the risk of the collection terminal 1045 falling off, solder joint cracking, or the end of the sampling circuit board 104 deforming due to external insertion or vibration. The insulating protection structure can be a cover film, a solder resist layer, insulating adhesive, potting compound, or a protective cover, used to improve the insulation reliability near the collection terminal 1045. The positioning structure can be a positioning hole, a positioning groove, a snap-fit, a limiting edge, or a mounting hole, used to limit the position of the second board 1044 and the collection terminal 1045 during assembly, improving the stability of external connections.

[0129] Combination Figure 2 , Figure 4 and Figure 5In some embodiments, the battery device 100 further includes electrode terminals 1082 and conductive connectors 1084. The electrode terminals 1082 and the explosion-proof valve 1021 are located on the same side of the battery cell 102 in the second direction B; one end of the conductive connector 1084 is electrically connected to the electrode terminals 1082, and the other end of the conductive connector 1084 is connected to the sampling line 1041.

[0130] With the above configuration, the electrical signal of the battery cell 102 can be transmitted to the conductive connector 1084 via the electrode terminal 1082, then to the sampling line 1041 via the conductive connector 1084, and finally to the collection terminal 1045 via the sampling line 1041, so that the sampling circuit board 104 can perform voltage sampling, status detection or other electrical signal acquisition on the battery cell 102.

[0131] Electrode terminal 1082 and explosion-proof valve 1021 are located on the same side of cell 102 in the second direction B, so that both electrode terminal 1082 and explosion-proof valve 1021 are located on one end surface of cell 102 in the second direction B. This structure facilitates the concentration of the electrical connection area and pressure relief area of ​​cell 102 on the same end face of cell 102, thereby enabling the battery device 100 to perform current connection, sampling connection, and safety pressure relief structure arrangement on this side. Electrode terminal 1082 may include a positive terminal and a negative terminal, and may also include a terminal post, a tab lead-out end, a top cover terminal, a riveted terminal, or a welded terminal, depending on the structure of cell 102. Electrode terminal 1082 is used for outputting or inputting electrical energy, and can also serve as a connection point for sampling line 1041 to collect voltage signals from cell 102.

[0132] Since both the electrode terminal 1082 and the explosion-proof valve 1021 are located on the same side of the battery cell 102 in the second direction B, when the sampling circuit board 104 is located on one side of multiple battery cells 102 in the second direction B, the sampling circuit board 104 can simultaneously be close to both the electrode terminal 1082 and the explosion-proof valve 1021. The sampling line 1041 can be connected to the electrode terminal 1082 through a shorter path, reducing the detour length of the sampling line and improving the stability of the sampling signal transmission and the reliability of the sampling connection. At the same time, since the sampling circuit board 104 is close to the area where the explosion-proof valve 1021 is located, the sampling circuit board 104 may obstruct the explosion-proof valve 1021. Therefore, by using the avoidance structure 106 to expose at least a part of the corresponding explosion-proof valve 1021, the convenience of sampling connection of the electrode terminal 1082 and the exhaust safety of the explosion-proof valve 1021 can be balanced.

[0133] One end of the conductive connector 1084 is electrically connected to the electrode terminal 1082 to establish an electrical conduction path between the battery cell 102 and the sampling circuit board 104. The conductive connector 1084 can be a nickel sheet, aluminum sheet, copper sheet, copper-aluminum composite sheet, nickel-copper composite sheet, busbar, sampling connection piece, conductive spring, flexible conductive sheet, metal adapter piece, or conductive terminal. One end of the conductive connector 1084 can be electrically connected to the electrode terminal 1082 by welding, laser welding, resistance welding, ultrasonic welding, riveting, crimping, screwing, plugging, snap-fitting, conductive adhesive bonding, or elastic contact. Through this connection, the voltage signal or current path related signal of the battery cell 102 can be stably extracted, eliminating the need for additional connecting wires and connectors. This not only reduces the number of parts and lowers contact resistance and failure points, but also allows the entire module to be quickly installed onto the battery cell 102 as a single component during assembly, greatly improving production efficiency. It also provides a reliable sampling connection point for the sampling line 1041.

[0134] The other end of the conductive connector 1084 is connected to the sampling line 1041, enabling the sampling line 1041 to be indirectly connected to the electrode terminal 1082 via the conductive connector 1084. The other end of the conductive connector 1084 can be connected to the corresponding pad, terminal, copper foil line, or connection hole of the sampling line 1041. The connection method can be welding, riveting, crimping, plugging, screwing, conductive adhesive bonding, thermoforming, or integral molding. Connecting the electrode terminal 1082 to the sampling line 1041 via the conductive connector 1084 reduces the risk of insufficient connection strength, assembly difficulties, or excessive stress on the circuit caused by directly bridging the sampling line 1041 to the electrode terminal 1082, thus improving the reliability of the connection between the sampling line 1041 and the battery cell 102.

[0135] Optionally, the conductive connector 1084 can serve as both a bus connection and a sampling connection for the battery cell 102. For example, the conductive connector 1084 can act as a bus between adjacent battery cells 102, while a local area is connected to the sampling line 1041 to transmit the voltage signal of the corresponding battery cell 102 or the connection node of adjacent battery cells 102 to the sampling line 1041. By enabling the conductive connector 1084 to perform both bus and sampling functions, the number of independent sampling pieces or additional connection lines can be reduced, improving the integration of the battery device 100 and reducing contact resistance, connection failure points, and assembly steps. Optionally, the conductive connector 1084 can also function solely as a sampling connection piece to lead the electrical signal from the electrode terminal 1082 to the sampling line 1041, without undertaking the main circuit bus function.

[0136] Optionally, the conductive connector 1084 can be fixed to the sampling circuit board 104 to form an integrated sampling connection structure. The conductive connector 1084 can be fixed to the sampling circuit board 104 by riveting, welding, embedding, hot pressing, gluing, snap-fitting, or screwing. After the conductive connector 1084 is fixed to the sampling circuit board 104, the sampling circuit board 104, the sampling line 1041, and the conductive connector 1084 can be installed as a whole component on multiple battery cells 102, thereby reducing the steps of individually arranging the conductive connector 1084 and the sampling line 1041 on site, and improving assembly efficiency and assembly consistency. The above structure can also reduce the risk of the sampling line 1041 being pulled, the solder joint fatigued, or the electrical connection failing due to the movement of the conductive connector 1084 relative to the sampling circuit board 104 under vibration environment.

[0137] Optionally, the conductive connector 1084 can be spaced apart from the explosion-proof valve 1021, or the conductive connector 1084 can be positioned away from the explosion-proof valve 1021. Since the conductive connector 1084 is typically a metal component, if it is located above the explosion-proof valve 1021, it may be subjected to high-temperature, high-pressure gas impact when the explosion-proof valve 1021 is opened, potentially affecting the exhaust path. Therefore, the conductive connector 1084 can be positioned to the side of the explosion-proof valve 1021, or it can be positioned outside the projection range of the explosion-proof valve 1021 on a plane perpendicular to the second direction B. Optionally, the conductive connector 1084 can also be provided with clearance notches, clearance holes, or locally narrowed areas to work in conjunction with the clearance structure 106 of the sampling circuit board 104 to reduce obstruction of the explosion-proof valve 1021.

[0138] Optionally, the connection position between the conductive connector 1084 and the sampling line 1041 can be located around the periphery of the avoidance structure 106, maintaining a preset distance from the first avoidance structure 1062 or the second avoidance structure 1064. By ensuring that the connection position between the conductive connector 1084 and the sampling line 1041 avoids the main exhaust area of ​​the explosion-proof valve 1021, the direct impact of high-temperature and high-pressure gas on the connection position when the explosion-proof valve 1021 is opened can be reduced, thereby reducing the risk of weld cracking, metal deformation, melting of the sampling line 1041, or insulation failure. Simultaneously, by placing the connection position between the conductive connector 1084 and the sampling line 1041 close to the electrode terminal 1082, the sampling path can be shortened, improving the accuracy and stability of voltage sampling.

[0139] like Figure 2As shown, in some embodiments, the conductive connector 1084 is fixedly connected to the sampling circuit board 104, and the conductive connector 1084 is electrically connected to the sampling line 1041. The fixed connection of the conductive connector 1084 to the sampling circuit board 104 and its electrical connection to the sampling line 1041 enables the conductive connector 1084, the sampling line 1041, and the sampling circuit board 104 to form a relatively stable integrated sampling connection structure, thereby improving the ease of assembly and the reliability of the electrical connection.

[0140] The conductive connector 1084 is fixedly connected to the sampling circuit board 104, thus fixing its position relative to the sampling circuit board 104. The conductive connector 1084 can be fixedly connected to the sampling circuit board 104 by welding, riveting, crimping, screwing, snap-fitting, hot pressing, embedding, injection molding, adhesive bonding, or through-hole connection. Through this fixed connection, the conductive connector 1084 no longer exists as an independent loose component, but can form an integral assembly with the sampling circuit board 104. During assembly, the integral assembly can be placed on one side of multiple battery cells 102 in the second direction B, and the conductive connector 1084 can be connected to the electrode terminals of the corresponding battery cell 102. This reduces the steps of individually positioning the conductive connector 1084 or individually arranging the sampling lines 1041, improving assembly efficiency and consistency.

[0141] The conductive connector 1084 is electrically connected to the sampling line 1041, enabling the electrical signal of the battery cell 102 to be transmitted to the sampling line 1041 via the conductive connector 1084. The conductive connector 1084 can be electrically connected to the corresponding pads, copper foil lines, conductive vias, connection terminals, or conductive layers of the sampling line 1041. The electrical connection between the conductive connector 1084 and the sampling line 1041 can be achieved through soldering, tin soldering, laser soldering, resistance soldering, ultrasonic soldering, riveting, crimping, conductive adhesive bonding, screwing, or elastic contact bonding. Through this electrical connection, the sampling line 1041 can be indirectly connected to the electrode terminals of the battery cell 102 via the conductive connector 1084 to collect the voltage signal or other electrical signals of the battery cell 102 and transmit the sampled signal to the collection terminal.

[0142] The conductive connector 1084 is fixedly connected to the sampling circuit board 104 and is electrically connected to the sampling line 1041. This connection also improves the reliability of the sampling connection structure under vibration, shock, or thermal cycling conditions. Since the battery device may be affected by vehicle vibration, handling impact, thermal expansion and contraction during charging and discharging, or casing deformation during use, if there is no fixed connection between the conductive connector 1084 and the sampling circuit board 104, the conductive connector 1084 is prone to displacement relative to the sampling circuit board 104, which could pull on the sampling line 1041 or cause fatigue damage to the sampling connection point. By fixing the conductive connector 1084 to the sampling circuit board 104, the possibility of the conductive connector 1084 shaking relative to the sampling circuit board 104 can be reduced, thus reducing the risk of cracking, loosening, or poor contact at the connection point of the sampling line 1041.

[0143] In some embodiments, after the conductive connector 1084 is fixedly connected to the sampling circuit board 104, the conductive connector 1084 and the sampling circuit board 104 can form an integrated sampling connection assembly. The integrated sampling connection assembly may simultaneously include the sampling circuit board 104, multiple sampling lines 1041, multiple conductive connectors 1084, a collection terminal, and a clearance structure. During assembly, the conductive connectors 1084 can be fixed and electrically connected to the sampling circuit board 104 first, and then the integrated sampling connection assembly can be installed on one side of the multiple battery cells 102 in the second direction B, so that each conductive connector 1084 is electrically connected to the electrode terminal of the corresponding battery cell 102.

[0144] In some embodiments, the conductive connector 1084 may be disposed on the side of the sampling circuit board 104 near the battery cell 102, or at least partially embedded in the sampling circuit board 104, or disposed on the side of the sampling circuit board 104 away from the battery cell 102 and electrically connected to the sampling line 1041 through a via. The conductive connector 1084 may be a nickel sheet, aluminum sheet, copper sheet, copper-aluminum composite sheet, nickel-copper composite sheet, sampling connector, bus connector, conductive spring, metal terminal, or flexible conductive sheet. The shape of the conductive connector 1084 may be sheet-like, strip-like, bent, stepped, bridged, or a composite shape with welding and fixing parts. By selecting different forms of conductive connectors 1084, the electrode terminal height, position, and connection method of different battery cells 102 can be adapted.

[0145] In some embodiments, the conductive connector 1084 maintains a preset distance from the clearance structure 106, or the conductive connector 1084 is positioned away from the explosion-proof valve. Since the conductive connector 1084 is typically a metal component, if it is located above the explosion-proof valve, it may be subjected to high-temperature, high-pressure gas impact when the valve is opened, or it may partially obstruct the exhaust path. Therefore, the conductive connector 1084 can be arranged to the side of the explosion-proof valve, or outside the projection range of the explosion-proof valve on a plane perpendicular to the second direction B. If necessary, the conductive connector 1084 can also be provided with clearance holes, clearance notches, slots, or partial narrowing to cooperate with the clearance structure on the sampling circuit board 104, ensuring that at least a portion of the explosion-proof valve remains exposed.

[0146] Combination Figure 7 In some embodiments, the sampling circuit board 104 has a reinforcing region 1048 at the edge of the avoidance structure 106. The reinforcing region 1048 is located between the avoidance structure 106 and the sampling line 1041, and the thickness of the reinforcing region 1048 is greater than the thickness of other areas of the sampling circuit board 104. With this arrangement, the relatively weak edge areas of the sampling circuit board 104 due to the presence of the avoidance structure 106 can be locally reinforced, so that the periphery of the avoidance structure 106 can meet the avoidance requirements of the explosion-proof valve 1021 while still having good structural strength and resistance to deformation.

[0147] Since the clearance structure 106 is located on the sampling circuit board 104 and corresponds to at least a portion of the explosion-proof valves 1021, the clearance structure 106 forms clearance areas such as through holes, notches, slots, cutouts, or clearance windows on the sampling circuit board 104. These clearance areas allow at least a portion of the corresponding explosion-proof valve 1021 to be exposed, but they also reduce the solid material area of ​​the sampling circuit board 104 at the corresponding location, making the edges of the clearance structure 106 prone to stress concentration areas. Especially when the battery device 100 is subjected to vibration, impact, assembly pressing, thermal expansion and contraction, or airflow impact generated by the opening of the explosion-proof valve 1021, the edges of the clearance structure 106 may experience deformation, crack propagation, warping, or delamination. Therefore, providing a reinforcing area 1048 at the edge of the clearance structure 106 on the sampling circuit board 104 can improve the local mechanical strength around the clearance structure 106 and reduce the possibility of a decrease in the structural reliability of the sampling circuit board 104 due to the clearance structure 106.

[0148] The reinforcement region 1048 is located between the avoidance structure 106 and the sampling line 1041, forming a structural protection area between them. The sampling line 1041 typically extends along the sampling circuit board 104 and is arranged around the periphery of the avoidance structure 106 as much as possible. If the edge of the avoidance structure 106 lacks reinforcement, when the sampling circuit board 104 cracks or deforms near the avoidance structure 106, the crack may extend towards the sampling line 1041, leading to breakage, copper foil peeling, insulation damage, or abnormal sampling signals. By placing the reinforcement region 1048 between the avoidance structure 106 and the sampling line 1041, the reinforcement region 1048 can block or slow the propagation of cracks at the edge of the avoidance structure 106 towards the sampling line 1041, thereby protecting the continuity of the sampling line 1041 and the reliability of the electrical connection.

[0149] The thickness of the reinforcing area 1048 is greater than the thickness of other areas of the sampling circuit board 104, giving the reinforcing area 1048 higher bending stiffness, tear resistance, and impact resistance compared to the ordinary areas of the sampling circuit board 104. The other areas of the sampling circuit board 104 can be understood as the conventional board areas on the sampling circuit board 104 without the reinforcing area 1048, such as the ordinary wiring areas on the first board 1042 or the second board 1044. By increasing the thickness of the reinforcing area 1048, the edges of the avoidance structure 106 can be locally reinforced without increasing the overall thickness of the sampling circuit board 104, thus balancing the overall thinness of the sampling circuit board 104 with the strength requirements of the surrounding area of ​​the avoidance structure 106. Compared to thickening the sampling circuit board 104 as a whole, locally setting the reinforcing area 1048 reduces material usage and space occupation, and minimizes the impact on the bending flexibility, assembly height, or wiring layout of the sampling circuit board 104.

[0150] Optionally, the reinforcing region 1048 can be a reinforcing layer disposed on the surface of the sampling circuit board 104, or it can be a thickened portion integrally formed with the substrate of the sampling circuit board 104. The reinforcing layer can be an insulating reinforcing sheet, a metal reinforcing sheet, a resin reinforcing layer, a fiberglass reinforcing layer, an adhesive layer reinforcing structure, a thickened area of ​​the cover film, or a local lamination reinforcing structure. For example, the reinforcing region 1048 may include a polyimide reinforcing sheet, an FR4 reinforcing sheet, an epoxy fiberglass reinforcing sheet, a mica reinforcing sheet, a ceramicized silicone reinforcing sheet, an aluminum sheet, a stainless steel sheet, or a copper sheet. When using an insulating reinforcing sheet, the insulation reliability around the sampling line 1041 can be maintained while improving the structural strength; when using a metal reinforcing sheet, higher mechanical strength can be obtained, but an insulating layer can be disposed between the metal reinforcing sheet and the sampling line 1041 to reduce the risk of short circuit.

[0151] Optionally, the reinforcement region 1048 may be disposed around at least a portion of the edge of the avoidance structure 106. When the avoidance structure 106 is a through hole penetrating the sampling circuit board 104, the reinforcement region 1048 may be annular, semi-annular, arc-shaped, frame-shaped, or partially strip-shaped and disposed around the through hole; when the avoidance structure 106 is a notch or slot disposed at the edge of the sampling circuit board 104, the reinforcement region 1048 may extend along the inner edge of the notch or slot; when the avoidance structure 106 is an elongated through hole, the reinforcement region 1048 may be disposed along the long side of the elongated through hole, or may also be disposed simultaneously in the end region of the elongated through hole. By disposing the reinforcement region 1048 along the edge of the avoidance structure 106, targeted reinforcement can be provided for areas in the avoidance structure 106 that are more prone to stress concentration.

[0152] Optionally, the reinforcement zone 1048 can be located between the first clearance structure 1062 and the sampling line 1041. Since the first clearance structure 1062 is located on the first plate 1042 and corresponds to multiple explosion-proof valves 1021, multiple sampling lines 1041 are typically arranged around the first plate 1042. By setting the reinforcement zone 1048 between the first clearance structure 1062 and the sampling line 1041, the strength of the first plate 1042 around the first clearance structure 1062 can be improved, reducing the risk of edge cracks in the first clearance structure 1062 affecting the sampling line 1041, and making it less likely that the airflow generated when the multiple explosion-proof valves 1021 are opened will cause damage to the first plate 1042 near the first clearance structure 1062. Optionally, the reinforcement area 1048 can also be located between the second clearance structure 1064 and the sampling line 1041. Since the second clearance structure 1064 is located on the second plate 1044, and the second plate 1044 typically carries more sampling lines 1041, converged lines, or connection terminals, the wiring density around the second clearance structure 1064 may be higher. By setting the reinforcement area 1048 between the second clearance structure 1064 and the sampling line 1041, a local crack-resistant and deformation-resistant structure can be formed in the second plate 1044, reducing the impact of the second clearance structure 1064 on the wiring reliability of the second plate 1044.

[0153] Optionally, the reinforcing zone 1048 can be spaced apart from the sampling line 1041, or it can cover the outer insulation layer of the sampling line 1041. When the reinforcing zone 1048 is spaced apart from the sampling line 1041, the space occupied by the reinforcing zone 1048 on the wiring of the sampling line 1041 can be reduced, and the impact of the material of the reinforcing zone 1048 on the electrical performance of the sampling line 1041 can be reduced. When the reinforcing zone 1048 covers the outer insulation layer of the sampling line 1041, the reinforcing zone 1048 can further provide mechanical protection for the sampling line 1041, reducing the risk of damage to the sampling line 1041 from external scratches, vibration wear, or airflow impact. If the reinforcing zone 1048 covers the sampling line 1041, an insulating medium can be provided between the reinforcing zone 1048 and the sampling line 1041, or the reinforcing zone 1048 itself can be made of insulating material, which is beneficial to the insulation reliability of the sampling line 1041.

[0154] Optionally, the thickness of the reinforcing region 1048 can be 0.05 mm to 1 mm greater than the thickness of other areas of the sampling circuit board 104, or 0.1 mm to 0.5 mm greater. The specific thickness of the reinforcing region 1048 can be determined based on the substrate type of the sampling circuit board 104, the size of the clearance structure 106, the distance between the sampling line 1041 and the clearance structure 106, the exhaust pressure of the explosion-proof valve 1021, and the vibration conditions of the battery device 100. When the size of the clearance structure 106 is large, the distance between the clearance structure 106 and the sampling line 1041 is close, or the sampling circuit board 104 is thin, the thickness of the reinforcing region 1048 can be appropriately increased to improve the edge crack resistance of the clearance structure 106; when the space of the sampling circuit board 104 is limited or flexibility needs to be maintained, a thinner reinforcing region 1048 can be used to reduce the impact on the assembly height or flexibility of the sampling circuit board 104.

[0155] Optionally, the reinforcing region 1048 can be attached to the sampling circuit board 104 by lamination, bonding, hot pressing, welding, riveting, injection molding, coating and curing, or integral molding. An adhesive layer can be provided between the reinforcing region 1048 and the sampling circuit board 104. This adhesive layer can be epoxy resin, acrylic resin, pressure-sensitive adhesive, thermosetting adhesive, hot melt adhesive, or flame-retardant adhesive. By stably connecting the reinforcing region 1048 and the sampling circuit board 104, the reinforcing region 1048 can be prevented from detaching under long-term vibration, temperature cycling, or airflow impact, thereby improving the continuous reinforcement effect of the reinforcing region 1048 on the edge of the avoidance structure 106.

[0156] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, in some embodiments, the first plate 1042 is elongated. Since multiple battery cells 102 are arranged adjacently along the first direction A, the elongated shape of the first plate 1042 extending along the first direction A allows it to be adapted to the arrangement direction of the multiple battery cells 102. The elongated first plate 1042 can cover or correspond to one side area of ​​the multiple battery cells 102 in the second direction B, allowing multiple sampling lines 1041 to extend along the length of the first plate 1042 and connect to their respective battery cells 102. The sampling circuit board 104 can utilize a narrow and continuous board area to transmit sampling signals from multiple battery cells 102, reducing the diffusion of sampling lines in the third direction C, reducing the area occupied by the sampling circuit board 104 on the top of the battery cells 102, and facilitating the avoidance of the structure 106 and multiple explosion-proof valves 1021 being arranged correspondingly along the first direction A.

[0157] When the first plate 1042 is elongated, its length direction can be consistent with or approximately consistent with the first direction A, its width direction can be consistent with or approximately consistent with the third direction C, and its thickness direction can be consistent with or approximately consistent with the second direction B. The first direction A, the second direction B, and the third direction C are mutually perpendicular. The first direction A can be the arrangement direction of multiple battery cells 102, the second direction B can be the direction of the side of the battery cell 102 where the explosion-proof valve 1021 is located facing outwards or the height direction of the battery cell 102, and the third direction C can be the width direction of the battery device 100. By defining the first direction A, the second direction B, and the third direction C as mutually perpendicular, the spatial relationship between the extension direction of the first plate 1042, the arrangement side of the sampling circuit board 104, and the width dimension of the first plate 1042 can be clearly defined, making the relative positions of the first plate 1042, the second plate 1044, the explosion-proof valve 1021, and the avoidance structure 106 clearer.

[0158] Optionally, such as Figure 6As shown, the dimension C of the end of the first plate 1042 facing the second plate 1044 in the third direction is larger than the dimension C of the end of the first plate 1042 away from the second plate 1044 in the third direction. That is, the first plate 1042 may not be a uniformly wide strip structure, but rather has a larger dimension C in the third direction at the end closer to the second plate 1044 and a smaller dimension C in the third direction at the end farther from the second plate 1044. Since multiple sampling lines 1041 need to converge from their corresponding positions on each cell 102 along the first plate 1042 to the second plate 1044, the closer to the second plate 1044, the more sampling lines 1041 are typically present, and the higher the wiring density. Therefore, making the dimension C of the end of the first plate 1042 facing the second plate 1044 larger in the third direction provides more board space for the convergence, routing, and layering of more sampling lines 1041, reducing the risk of excessive wiring density, insufficient line spacing, or line crossing.

[0159] The first plate 1042, with a smaller dimension in the third direction C at the end furthest from the second plate 1044, reduces the space occupied by the first plate 1042 on the side of the battery cell 102 in the second direction B. For the battery cell 102 furthest from the second plate 1044, the number of sampling lines 1041 that need to be supported on the first plate 1042 is relatively small. Therefore, by reducing the dimension in the third direction C, the amount of board material used can be reduced, the weight lowered, and the potential obstruction of the explosion-proof valve 1021 or other top structures by the first plate 1042 can be minimized. The first plate 1042 can form a gradually widening or locally widened structure according to the variation in the number of sampling lines 1041 along the first direction A, so that the surface area of ​​the sampling circuit board 104 matches the actual wiring requirements.

[0160] Optionally, the dimension of the end of the first board 1042 facing the second board 1044 in the third direction C can be 1.1 to 3 times, or 1.2 to 2 times, the dimension of the end of the first board 1042 away from the second board 1044 in the third direction C. The ratio can be determined based on the number of battery cells 102, the number of sampling lines 1041, the line width of the sampling lines 1041, the line spacing, the size of the avoidance structure 106, and the position of the second board 1044. When the number of battery cells 102 or the number of sampling lines 1041 is large, the end of the first board 1042 closer to the second board 1044 can be made wider to provide sufficient space for wiring convergence; when the number of battery cells 102 is small or the sampling lines 1041 can be converged through multi-layer wiring, the size difference can be smaller to reduce the space occupied by the sampling circuit board 104.

[0161] Optionally, the end of the first plate 1042 facing the second plate 1044 has a larger dimension in the third direction C, which can be achieved through a trapezoidal profile, a stepped profile, a locally widened portion, a fan-shaped extension portion, or a lateral extension portion. For example, the first plate 1042 can gradually widen along the first direction A from the end away from the second plate 1044 to the end facing the second plate 1044; a stepped widening region can also be provided near the second plate 1044; or a locally laterally protruding region can be provided on the side near the second plate 1044. All of the above structures can enable the end of the first plate 1042 near the second plate 1044 to obtain a larger dimension in the third direction C, thereby meeting the convergence requirements of the sampling lines 1041.

[0162] The first plate 1042 is elongated, or the dimension of the end of the first plate 1042 facing the second plate 1044 in the third direction C is greater than the dimension of the end of the first plate 1042 away from the second plate 1044 in the third direction C, both can cooperate with the avoidance structure 106. When the first plate 1042 is elongated, the first avoidance structure 1062 can be arranged on the first plate 1042 along the first direction A and correspondingly set with multiple explosion-proof valves 1021, thereby exposing at least a portion of the multiple explosion-proof valves 1021. When the dimension of the end of the first plate 1042 near the second plate 1044 in the third direction C is larger, the wider area can provide more wiring space for the sampling line 1041 to bypass the first avoidance structure 1062, and can also provide support space for the reinforcement area 1048, the connection position of the conductive connector 1084, or the convergence area of ​​the sampling line 1041. At the same time, the end of the first plate 1042 that is far from the second plate 1044 is narrower, which can reduce the space occupied around the explosion-proof valve 1021 of the corresponding battery cell 102.

[0163] Optionally, the dimensional changes of the first plate 1042 in the third direction C can avoid the placement of multiple explosion-proof valves 1021. Even if the first plate 1042 is locally widened, the solid portion of the first plate 1042 can be located outside the projection range of at least a portion of the explosion-proof valves 1021 through the first avoidance structure 1062, edge notches, or wiring detours. Thus, the widened structure of the first plate 1042 does not significantly increase the obstruction of the explosion-proof valves 1021, but instead provides more reasonable space for the sampling line 1041 to circumnavigate around the avoidance structure 106. With this structure, the first plate 1042 can simultaneously meet the requirements of sampling line 1041 convergence, avoidance structure 106 placement, and explosion-proof valve 1021 exposure.

[0164] Optionally, the size of the first board 1042 in the third direction C can be matched to the variation in the number of multiple sampling lines 1041 along the first direction A. At the end closer to the second board 1044, because it needs to support multiple sampling lines 1041 from multiple cells 102, the size of the first board 1042 in the third direction C is larger; at the end farther from the second board 1044, because it only needs to support fewer sampling lines 1041, the size of the first board 1042 in the third direction C is smaller. This improves the utilization rate of the sampling circuit board 104, reduces the risk of excessive empty board space in areas far from the second board 1044, and reduces the risk of insufficient board space in areas close to the second board 1044 leading to dense sampling lines 1041, insufficient spacing, or difficulties in winding.

[0165] Combination Figure 7 In some embodiments, the solid portion of the first plate 1042 is located on one side of the plurality of explosion-proof valves 1021 in the third direction C, and the clearance structure 106 is correspondingly arranged with the plurality of explosion-proof valves 1021 so that the plurality of explosion-proof valves 1021 are fully exposed; wherein, the first direction A, the second direction B and the third direction C are perpendicular to each other.

[0166] The solid portion of the first plate 1042 is located on one side of the plurality of explosion-proof valves 1021 in the third direction C. This means that, on a plane perpendicular to the second direction B, the portion of the first plate 1042 that actually contains sheet metal, conductive lines, cover film, solder pads, reinforcing area 1048, or other solid materials is located on the third direction C side of the projection area of ​​the plurality of explosion-proof valves 1021, without crossing or covering the projection area of ​​the plurality of explosion-proof valves 1021. In other words, when viewed along the second direction B, the solid portion of the first plate 1042 is offset to one side of the plurality of explosion-proof valves 1021, so that the plurality of explosion-proof valves 1021 are not obstructed by the solid portion of the first plate 1042 in the third direction C. This reduces the occupancy of the explosion-proof valves 1021 from the overall layout of the first plate 1042, rather than relying solely on local openings or gaps for avoidance.

[0167] The clearance structure 106 is correspondingly arranged with multiple explosion-proof valves 1021 to fully expose the multiple explosion-proof valves 1021. Full exposure can be understood as follows: on a plane perpendicular to the second direction B, the projection range of the multiple explosion-proof valves 1021 is not covered by the solid portion of the first plate 1042, or the exhaust path of the multiple explosion-proof valves 1021 in the second direction B is not obstructed by the solid portion of the first plate 1042. The clearance structure 106 can be formed by the lateral clearance space of the first plate 1042 relative to the explosion-proof valves 1021, or it can include notches, slots, through holes, hollow areas, or clearance windows located on the edge of the first plate 1042. By correspondingly arranging the clearance structure 106 with the multiple explosion-proof valves 1021, each corresponding explosion-proof valve 1021 can be in an unobstructed state, allowing gas to be discharged more directly through the explosion-proof valve 1021 after it is opened.

[0168] Compared to a structure that partially exposes the explosion-proof valve 1021, fully exposing multiple explosion-proof valves 1021 further reduces exhaust resistance. When the internal pressure of the battery cell 102 increases and triggers the opening of the explosion-proof valve 1021, the high-temperature and high-pressure gas can be discharged outward without obstruction by the solid portion of the first plate 1042, reducing the possibility of backflow, deflection, or impact on the sampling circuit board 104 at the explosion-proof valve 1021. This reduces the risk of ablation, warping, cracking, copper foil peeling, or failure of the sampling line 1041 in the first plate 1042, and improves the pressure relief efficiency of multiple battery cells 102 under abnormal operating conditions and the overall safety of the battery device 100.

[0169] Optionally, the first plate 1042 can extend along the first direction A, while being offset to one side of the plurality of explosion-proof valves 1021 in the third direction C. Since the plurality of battery cells 102 are arranged adjacently along the first direction A, the plurality of explosion-proof valves 1021 can form an explosion-proof valve 1021 arrangement area along the first direction A. The first plate 1042 extending along the first direction A and located on the side of the explosion-proof valve 1021 arrangement area in the third direction C allows the first plate 1042 to still be able to arrange sampling lines 1041 corresponding to the plurality of battery cells 102, while keeping the explosion-proof valve 1021 arrangement area unobstructed. The sampling lines 1041 can extend from the first plate 1042 toward the corresponding electrode terminals 1082 and are electrically connected to the electrode terminals 1082 through conductive connectors 1084, thereby enabling sampling of the battery cells 102 without obstructing the explosion-proof valves 1021.

[0170] Optionally, the clearance structure 106 can be a continuous clearance edge formed on the side of the first plate 1042 facing the plurality of explosion-proof valves 1021. The continuous clearance edge extends along a first direction A and is spaced apart from the plurality of explosion-proof valves 1021 in a third direction C, so that the plurality of explosion-proof valves 1021 are located outside the solid portion of the first plate 1042. The continuous clearance edge can be a straight edge, a broken edge, an arc edge, or an irregularly shaped edge adapted to the outer contour of the plurality of explosion-proof valves 1021. By forming the clearance structure 106 with a continuous clearance edge, the problem of local strength weakening caused by setting multiple independent through holes on the first plate 1042 can be reduced, and the sampling line 1041 can be concentrated along the side of the first plate 1042 away from the explosion-proof valves 1021.

[0171] Optionally, the clearance structure 106 may also include multiple partial clearance portions corresponding one-to-one with the multiple explosion-proof valves 1021. The partial clearance portions can be notches, slots, through holes, hollow areas, or lateral recesses. Even if the entire solid portion of the first plate 1042 is located on one side of the explosion-proof valve 1021 in the third direction C, the partial clearance portions can still be used to accommodate the partial outward expansion area, assembly tolerance area, or exhaust diffusion area of ​​the explosion-proof valve 1021 after opening, ensuring that the explosion-proof valve 1021 remains fully exposed in the actual assembled state. Through multiple partial clearance portions, while the first plate 1042 continues to extend continuously along the first direction A, the multiple explosion-proof valves 1021 can each obtain more reliable clearance space.

[0172] Optionally, the solid portion of the first plate 1042 and the plurality of explosion-proof valves 1021 may have a preset distance in the third direction C. The preset distance may be 0.5mm to 10mm, or 1mm to 5mm. By setting the preset distance, the positioning deviation of the battery cell 102, the sampling circuit board 104 and the housing during the assembly process can be compensated, reducing the risk that the solid portion of the first plate 1042 may enter the projection range of the explosion-proof valve 1021 due to offset. At the same time, the preset distance can also provide space for the initial airflow diffusion after the explosion-proof valve 1021 is opened, reducing the possibility that the airflow will be discharged directly close to the edge of the first plate 1042. The preset distance should not be too large, so as to avoid excessive offset of the first plate 1042, which would cause the sampling line 1041 to become longer or the size of the battery device 100 in the third direction C to increase.

[0173] Optionally, when the solid portion of the first plate 1042 is located on one side of the plurality of explosion-proof valves 1021 in the third direction C, the second plate 1044 can be located on one side of the plurality of battery cells 102 in the first direction A, or only partially located on one side of the battery cells 102 in the second direction B. With this arrangement, the first plate 1042 can completely avoid the plurality of explosion-proof valves 1021, while the second plate 1044 can partially avoid the explosion-proof valves 1021 of the end battery cell 1024 near the end battery cell 1024 through the second avoidance structure 1064 and the coverage area ratio control. Thus, the first plate 1042 and the second plate 1044 can adopt different avoidance methods according to their respective functional areas, balancing the arrangement of the sampling line 1041, the setting of the collection terminal 1045, and the exposure of the explosion-proof valves 1021.

[0174] Optionally, when the solid portion of the first plate 1042 is located on one side of the plurality of explosion-proof valves 1021 in the third direction C, the sampling line 1041 can be mainly arranged in the area of ​​the first plate 1042 away from the explosion-proof valves 1021, or extend along the solid portion of the first plate 1042 in the first direction A. The sampling line 1041 can be spaced apart from the explosion-proof valves 1021 and led out to the corresponding electrode terminal 1082 via a conductive connector 1084. This wiring method can reduce the probability of the sampling line 1041 being located above the explosion-proof valves 1021, reduce the direct impact of high-temperature and high-pressure gas on the sampling line 1041 when the explosion-proof valves 1021 are opened, and improve the insulation and conductivity reliability of the sampling line 1041.

[0175] It is understandable that the sampling circuit board 104 can be designed to be narrower than the width of the explosion-proof valve array at the top of the battery cell, instead of using through-holes. The sampling circuit board 104 is offset along the cell layout direction, positioning itself entirely on one side (e.g., the left or right side) of all the explosion-proof valves, thus fully exposing all the valves. This approach is suitable for situations with a small number of sampling lines and a narrow circuit board, allowing for near-complete exposure of the explosion-proof valves, but may require adjustments to the layout of other components inside the battery pack.

[0176] In some embodiments, such as Figure 1 As shown, on a plane perpendicular to the second direction B, the minimum distance L between the edge of the clearance structure 106 and the edge of the corresponding explosion-proof valve 1021 is not less than 1 mm. By limiting the minimum distance, the clearance structure 106 can have a certain clearance margin relative to the corresponding explosion-proof valve 1021, reducing the intrusion of the physical part of the sampling circuit board 104 into the projection area of ​​the explosion-proof valve 1021 due to manufacturing tolerances, assembly deviations, thermal deformation, or vibration displacement, thereby improving the reliability of the exposure of the explosion-proof valve 1021.

[0177] On the plane perpendicular to the second direction B, taking the direction of the end face of the explosion-proof valve 1021 on the battery cell 102 as the observation reference, when observing the sampling circuit board 104 and the explosion-proof valve 1021 along the second direction B, the projected position relationship of the edge of the clearance structure 106 and the corresponding edge of the explosion-proof valve 1021 on the aforementioned plane. The edge of the clearance structure 106 can be the edge of the through hole wall, the inner edge of the notch, the edge of the slot, the boundary of the hollow area, the edge of the clearance window, or the edge of the plate formed by the lateral clearance of the first plate 1042. The edge of the explosion-proof valve 1021 can be the outer contour edge of the opening area, the pressure relief opening area, the valve port boundary, or the preset rupture area of ​​the explosion-proof valve 1021 on this plane. By limiting the minimum distance between the two edges in the same projection plane, the degree of clearance of the clearance structure 106 to the explosion-proof valve 1021 can be clearly determined.

[0178] The minimum distance between the edge of the clearance structure 106 and the edge of the corresponding explosion-proof valve 1021 is not less than 1 mm. This means that the minimum of the closest distances from any point on the edge of the clearance structure 106 to the edge of the corresponding explosion-proof valve 1021 on this plane is not less than 1 mm. In other words, the clearance structure 106 not only needs to be correspondingly set to the explosion-proof valve 1021, but also needs to reserve an edge gap of at least 1 mm around the explosion-proof valve 1021. The gap allows the explosion-proof valve 1021 to be sufficiently exposed in the actual assembly state, especially when there are assembly positioning deviations in the sampling circuit board 104, battery cell 102, or housing, it can still reduce the risk of the edge of the clearance structure 106 being too close to or even overlapping with the edge of the explosion-proof valve 1021.

[0179] Optionally, when the clearance structure 106 is a through hole penetrating the sampling circuit board 104, the minimum distance between the edge of the through hole and the edge of the corresponding explosion-proof valve 1021 is not less than 1 mm. That is, the projected size of the through hole on the plane perpendicular to the second direction B can be larger than the projected size of the explosion-proof valve 1021, and the edge of the through hole extends outward at least 1 mm relative to the edge of the explosion-proof valve 1021. In this way, the explosion-proof valve 1021 can be located within the projection range of the through hole, and an annular or partially annular clearance gap is formed around the explosion-proof valve 1021, so that the airflow after the explosion-proof valve 1021 is opened can pass through the corresponding area of ​​the through hole more smoothly and be discharged. The above structure can be applied to the first clearance structure 1062 provided on the first plate 1042, and can also be applied to the second clearance structure 1064 provided on the second plate 1044.

[0180] Optionally, when the clearance structure 106 is a notch or lateral clearance structure located at the edge of the sampling circuit board 104, the minimum distance between the edge of the notch or the solid edge of the sampling circuit board 104 and the edge of the corresponding explosion-proof valve 1021 is not less than 1 mm. In this case, the explosion-proof valve 1021 can be located outside the solid portion of the sampling circuit board 104, and the clearance structure 106 is formed by the clearance of the edge of the sampling circuit board 104. By limiting the minimum distance to more than 1 mm, it can be ensured that a clear lateral distance is maintained between the solid portion of the sampling circuit board 104 and the explosion-proof valve 1021, so that the exhaust path of the explosion-proof valve 1021 in the second direction B is not blocked by the sampling circuit board 104. The above structure is particularly suitable for situations where the solid portion of the first plate 1042 is located on one side of the multiple explosion-proof valves 1021 in the third direction C, and the multiple explosion-proof valves 1021 are completely exposed.

[0181] Limiting the minimum spacing to no less than 1mm also improves the structural reliability of the edge of the avoidance structure 106. If the edge of the avoidance structure 106 is too close to the edge of the explosion-proof valve 1021, the high-temperature and high-pressure airflow when the explosion-proof valve 1021 is opened can easily directly impact the edge of the sampling circuit board 104, causing edge ablation, warping, delamination, or crack propagation. By reserving a spacing of no less than 1mm, the probability of airflow directly approaching the edge of the sampling circuit board 104 can be reduced, and a certain amount of space can be provided for the airflow diffusion around the explosion-proof valve 1021, thereby reducing the thermal and mechanical impact on the edge of the avoidance structure 106.

[0182] Optionally, the minimum distance between the edge of the clearance structure 106 and the edge of the corresponding explosion-proof valve 1021 can be no less than 1.5mm, 2mm, 3mm, or 5mm. A larger minimum distance provides more clearance around the explosion-proof valve 1021, resulting in better adaptability to assembly deviations and airflow diffusion; however, an excessively large distance may increase the size of the clearance structure 106, reducing the physical area of ​​the sampling circuit board 104 available for wiring, setting the reinforcement area 1048, or installing the conductive connector 1084. Therefore, a suitable distance can be selected based on the size of the battery cell 102, the size of the explosion-proof valve 1021, the thickness of the sampling circuit board 104, assembly tolerances, the spacing of the sampling lines 1041, and the internal space of the battery device 100, provided it is no less than 1mm.

[0183] Optionally, for multiple explosion-proof valves 1021, the minimum distance between the edge of the clearance structure 106 and the edge of each corresponding explosion-proof valve 1021 is not less than 1 mm. This reduces the risk that only some explosion-proof valves 1021 have sufficient clearance, while other explosion-proof valves 1021 have limited exhaust paths due to assembly deviations or insufficient edge distances. In particular, when the first clearance structure 1062 is an elongated through-hole extending along the first direction A and simultaneously corresponds to multiple explosion-proof valves 1021, the edge of the elongated through-hole can maintain a distance of not less than 1 mm from the edge of each explosion-proof valve 1021, thereby ensuring that the explosion-proof valves 1021 of multiple battery cells 102 have reliable exhaust space.

[0184] Optionally, the minimum distance between the edge of the clearance structure 106 and the edge of the explosion-proof valve 1021 is not less than 1 mm, and it can be configured in conjunction with the reinforcement area 1048. The reinforcement area 1048 is located between the clearance structure 106 and the sampling line 1041, and the thickness of the reinforcement area 1048 is greater than the thickness of other areas of the sampling circuit board 104. Since the outward expansion of the clearance structure 106 relative to the explosion-proof valve 1021 reduces the solid area of ​​the sampling circuit board 104, the reinforcement area 1048 can provide local reinforcement at the edge of the clearance structure 106, reducing the risk of strength reduction caused by the increase in the size of the clearance structure 106. At the same time, a distance of more than 1 mm helps to reduce the direct action of high-temperature and high-pressure gas on the reinforcement area 1048 and the sampling line 1041, improving the reliability of the sampling circuit board 104 under the condition that the explosion-proof valve 1021 is open.

[0185] like Figure 4 As shown, in some embodiments, the battery device 100 further includes a buffer 110, which is disposed between the sampling circuit board 104 and the battery cell 102, and the buffer 110 is in contact with both the sampling circuit board 104 and the battery cell 102. The buffer 110 is provided with a buffer clearance structure 1102 corresponding to the explosion-proof valve 1021. With this arrangement, the buffer 110 can form an elastic support or space protection between the sampling circuit board 104 and the battery cell 102, reducing the risk of wear, stress concentration, or abnormal force on the electrical connection parts caused by the sampling circuit board 104 directly pressing against the battery cell 102. At the same time, the buffer clearance structure 1102 can make way for the explosion-proof valve 1021, reducing the risk of the buffer 110 blocking the explosion-proof valve 1021, thereby taking into account both the installation stability of the sampling circuit board 104 and the venting safety of the explosion-proof valve 1021.

[0186] The buffer 110 is located between the sampling circuit board 104 and the battery cell 102. This means the buffer 110 is situated on the side of the sampling circuit board 104 closest to the battery cell 102, sandwiched between the sampling circuit board 104 and the battery cell 102. The buffer 110 can be located along the second direction B between the sampling circuit board 104 and the side surface of the battery cell 102 where the explosion-proof valve 1021 is located. Since the electrode terminal 1082 and the explosion-proof valve 1021 can be located on the same side of the battery cell 102 in the second direction B, and the sampling circuit board 104 can also be arranged in the same area, the buffer 110 can provide support and buffering between the sampling circuit board 104 and the battery cell 102, preventing the sampling circuit board 104 from directly contacting the top cover of the battery cell 102, the peripheral structure of the electrode terminal 1082, or the peripheral area of ​​the explosion-proof valve 1021 over a large area. This reduces the possibility of a rigid collision between the sampling circuit board 104 and the battery cell 102 during vibration, impact, or thermal cycling.

[0187] The buffer 110 contacts both the sampling circuit board 104 and the battery cell 102, enabling it to transfer supporting force and absorb relative displacement between them. The buffer 110 can contact either the first plate 1042 or the second plate 1044 of the sampling circuit board 104; it can also contact the top cover, end face of the housing, the periphery of the explosion-proof valve 1021, or the insulating support of the battery cell 102. Through the contact support of the buffer 110, the position of the sampling circuit board 104 above the battery cell 102 becomes more stable, reducing the possibility of excessive suspension or excessive local stress on the sampling circuit board 104. For the structure where the conductive connector 1084 is fixedly connected to the sampling circuit board 104, the buffer 110 can also reduce the fatigue stress at the connection point of the conductive connector 1084 caused by the vibration of the sampling circuit board 104, improving the reliability of the connection between the conductive connector 1084 and the sampling line 1041 and the electrode terminal 1082.

[0188] The buffer 110 can be made of materials that are elastic, insulating, heat-resistant, or flame-retardant. For example, the buffer 110 can be foam, rubber pad, silicone pad, polyurethane pad, ethylene-vinyl acetate copolymer pad (EVA), ethylene propylene diene monomer (EPDM), insulating pad, mica pad, ceramicized silicone pad, flame-retardant foam, aerogel pad, or composite buffer pad. By selecting insulating materials, the risk of short circuits between the sampling lines 1041, conductive connectors 1084, or pads on the sampling circuit board 104 and the housing of the battery cell 102 can be reduced; by selecting heat-resistant or flame-retardant materials, the safety of the buffer 110 can be improved when the explosion-proof valve 1021 is opened or the battery cell 102 is abnormally heated.

[0189] The buffer member 110 is provided with a buffer clearance structure 1102 corresponding to the explosion-proof valve 1021, so that the buffer member 110 will not obstruct or significantly hinder the explosion-proof valve 1021. The buffer clearance structure 1102 can be a through hole, slot, notch, hollow area, clearance window, exhaust channel, or locally thinned area penetrating the buffer member 110. The buffer clearance structure 1102 can be provided corresponding to one explosion-proof valve 1021 or to multiple explosion-proof valves 1021. For example, the buffer clearance structure 1102 can be a long strip-shaped through groove extending along the first direction A and corresponding to multiple explosion-proof valves 1021 arranged along the first direction A; it can also be multiple buffer holes arranged at intervals, each corresponding to one of the multiple explosion-proof valves 1021. Through the buffer clearance structure 1102, the gas discharged when the explosion-proof valve 1021 is opened can bypass or pass through the buffer member 110 without being blocked by the buffer member 110.

[0190] Optionally, the buffer clearance structure 1102 can be correspondingly arranged with the clearance structure 106 on the sampling circuit board 104 in the second direction B. When viewed along the second direction B, the projection of the buffer clearance structure 1102 can at least partially overlap with the projection of the first clearance structure 1062 or the second clearance structure 1064 on the sampling circuit board 104, and correspond to the explosion-proof valve 1021. By making the explosion-proof valve 1021, the buffer clearance structure 1102, and the clearance structure 106 of the sampling circuit board 104 form a connected or corresponding exhaust path along the second direction B, the gas after the explosion-proof valve 1021 is opened can be discharged sequentially through the explosion-proof valve 1021, the buffer clearance structure 1102, and the clearance structure 106, reducing the possibility of gas stagnation or lateral impact between the buffer 110 and the sampling circuit board 104, and further improving the continuity of the pressure relief channel and the smoothness of the exhaust of the explosion-proof valve 1021.

[0191] Optionally, the minimum distance between the edge of the buffer clearance structure 1102 and the edge of the corresponding explosion-proof valve 1021 on a plane perpendicular to the second direction B can be no less than 1 mm. This structure allows for an assembly allowance for the buffer member 110 relative to the explosion-proof valve 1021, reducing the risk of the buffer member 110 obstructing the explosion-proof valve 1021 due to installation deviation, compression deformation, or thermal expansion. Since the buffer member 110 typically has a certain degree of elasticity and may expand laterally under pressure, the buffer clearance structure 1102 can be set larger than the size of the corresponding explosion-proof valve 1021 to ensure that the buffer member 110 does not enter the main exhaust area of ​​the explosion-proof valve 1021 under compressed conditions.

[0192] Optionally, the buffer 110 can be bonded to the sampling circuit board 104, the battery cell 102, or clamped and fixed between the sampling circuit board 104 and the battery cell 102. The buffer 110 can be fixed by pressure-sensitive adhesive, thermosetting adhesive, double-sided adhesive, structural adhesive, dispensing, snap-fit, positioning holes, positioning posts, or limiting grooves. By fixing the buffer 110, the risk of displacement of the buffer 110 during assembly, transportation, or use can be reduced, ensuring that the buffer avoidance structure 1102 maintains a continuous correspondence with the explosion-proof valve 1021. If the buffer 110 shifts, the buffer avoidance structure 1102 may deviate from the explosion-proof valve 1021; therefore, setting a positioning structure helps improve the reliability of venting avoidance.

[0193] Optionally, the buffer 110 can be disposed between the first plate 1042 and the plurality of battery cells 102, or between the second plate 1044 and the end battery cell 1024. When the buffer 110 is disposed between the first plate 1042 and the plurality of battery cells 102, the buffer clearance structure 1102 can correspond to the explosion-proof valve 1021 of the plurality of battery cells 102 and cooperate with the first clearance structure 1062; when the buffer 110 is disposed between the second plate 1044 and the end battery cell 1024, the buffer clearance structure 1102 can correspond to the explosion-proof valve 1021 of the end battery cell 1024 and cooperate with the second clearance structure 1064. The buffer 110 can also include a plurality of segmented buffers 110, each segmented buffer 110 being disposed in the corresponding area of ​​a different battery cell 102, so as to provide local support without affecting the exposure of the explosion-proof valve 1021.

[0194] Optionally, the thickness of the buffer 110 can be determined based on the gap between the sampling circuit board 104 and the battery cell 102, the height of the electrode terminal 1082, the connection position of the conductive connector 1084, and the exhaust space of the explosion-proof valve 1021. The buffer 110, in its uncompressed state, can have a thickness greater than the target gap between the sampling circuit board 104 and the battery cell 102, and is moderately compressed after assembly to form a stable supporting force. The compression of the buffer 110 should not be too large, lest it expand laterally and enter the corresponding area of ​​the explosion-proof valve 1021; nor should it be too small, lest it fail to effectively buffer the relative vibration between the sampling circuit board 104 and the battery cell 102. By coordinating the buffer clearance structure 1102 with the thickness and compression ratio of the buffer 110, the buffer 110 can provide support without affecting the exhaust of the explosion-proof valve 1021.

[0195] Optionally, the buffer 110 can also provide insulation for the sampling line 1041 and the conductive connector 1084. Since there is a potential difference near the sampling line 1041, the conductive connector 1084, and the electrode terminal 1082, the buffer 110, positioned between the sampling circuit board 104 and the battery cell 102, can reduce the risk of abnormal contact between the conductive areas on the sampling circuit board 104 and the battery cell 102 housing, top cover, or other conductive structures. Especially when the sampling circuit board 104 has a clearance structure 106, the clearance structure 106 may have edges, reinforcement areas 1048, or wiring detour areas around it. The buffer 110 can provide local support and insulation protection in these areas, while avoiding the explosion-proof valve 1021 through the buffer clearance structure 1102, reducing the risk of the insulating buffer material blocking the pressure relief path.

[0196] like Figure 8 As shown, in some embodiments, the inner wall of the buffer avoidance structure 1102 forms a guide surface 1104, which gradually expands in the direction away from the explosion-proof valve 1021. With this arrangement, the gas discharged from the explosion-proof valve 1021 after it is opened can gradually diffuse along the guide surface 1104 and be discharged through the buffer avoidance structure 1102, reducing the possibility of the gas undergoing abrupt changes, local impacts, or stagnation within the buffer avoidance structure 1102, thereby improving the smoothness of exhaust and reducing the scouring damage of high-temperature and high-pressure gas to local areas of the buffer member 110.

[0197] The buffer clearance structure 1102 can be a through hole, notch, slot, hollow area, clearance window, or exhaust channel penetrating the buffer member 110. The inner wall of the buffer clearance structure 1102 forms the wall surface that creates the through hole, notch, slot, or exhaust channel. The inner wall forms a guide surface 1104, enabling the buffer clearance structure 1102 to not only provide simple clearance but also guide and diffuse the gas discharged from the explosion-proof valve 1021. The guide surface 1104 gradually expands away from the explosion-proof valve 1021, meaning that the opening size, flow cross-sectional area, or inner wall spacing of the buffer clearance structure 1102 gradually increases from the end closest to the explosion-proof valve 1021 to the end furthest from the explosion-proof valve 1021. After the gas enters the buffer clearance structure 1102 from the explosion-proof valve 1021, it can enter the space with a gradually increasing cross-sectional area, and the airflow velocity and local impact pressure can be mitigated to a certain extent.

[0198] Optionally, the guide surface 1104 can be an inclined plane, an arc-shaped surface, a conical surface, a flared surface, a frustum-shaped surface, a ramp surface, or a curved transition surface. When the buffer avoidance structure 1102 is a circular or elliptical through hole, the guide surface 1104 can form a frustum-shaped or frustum-shaped inner wall, making the size of the buffer avoidance structure 1102 smaller at the end near the explosion-proof valve 1021 and larger at the end away from the explosion-proof valve 1021; when the buffer avoidance structure 1102 is a long strip groove, the guide surface 1104 can form an inclined or arc-shaped surface that gradually expands along the width of the groove; when the buffer avoidance structure 1102 is an edge notch, the guide surface 1104 can form a notch wall that gradually expands outward from the side of the battery cell 102 towards the side of the sampling circuit board 104. All of the above structures can make the buffer avoidance structure 1102 expand in the direction of gas discharge.

[0199] The guide surface 1104 gradually expands away from the explosion-proof valve 1021, which helps reduce the obstruction of the buffer 110 to the exhaust airflow. If the inner wall of the buffer avoidance structure 1102 is a vertical wall and the opening size is close to that of the explosion-proof valve 1021, the gas when the explosion-proof valve 1021 is opened may directly impact the inner wall, resulting in local high-temperature ablation, material spalling, deformation of the buffer 110, or airflow backflow. By setting the gradually expanding guide surface 1104, the gas can diffuse away from the explosion-proof valve 1021 along the guide surface 1104, and the buffer avoidance structure 1102 forms a smoother transition for the airflow, reducing the situation where the gas concentrates and impacts the inner wall of the buffer 110. Especially when the buffer 110 is made of foam, rubber, silicone, or other elastic materials, the guide surface 1104 can reduce the risk of tearing and ablation of the edges of the buffer 110 by high-temperature and high-pressure gas.

[0200] Optionally, the guide surface 1104 can be configured to correspond to the clearance structure 106 on the sampling circuit board 104. The end of the buffer clearance structure 1102 near the explosion-proof valve 1021 can correspond to the explosion-proof valve 1021, and the end away from the explosion-proof valve 1021 can correspond to the clearance structure 106 on the sampling circuit board 104. Since the guide surface 1104 gradually expands in the direction away from the explosion-proof valve 1021, a larger outlet area can be formed at the end away from the explosion-proof valve 1021, allowing gas to enter the clearance structure 106 on the sampling circuit board 104 or the pressure relief space inside the housing. By connecting or corresponding the expanded end of the buffer clearance structure 1102 to the clearance structure 106 on the sampling circuit board 104, a continuous expanding exhaust path can be formed from the explosion-proof valve 1021 to the buffer clearance structure 1102 and then to the clearance structure 106 on the sampling circuit board 104, improving the flow capacity of the pressure relief channel.

[0201] Optionally, the opening area of ​​the buffer avoidance structure 1102 near the explosion-proof valve 1021 can be no less than the projected area of ​​the explosion-proof valve 1021 on a plane perpendicular to the second direction B, and the opening area of ​​the buffer avoidance structure 1102 away from the explosion-proof valve 1021 can be greater than the opening area near the explosion-proof valve 1021. This ensures that the buffer avoidance structure 1102 does not significantly reduce the exhaust cross-section near the explosion-proof valve 1021, and provides greater exhaust space for the airflow through gradual expansion away from the explosion-proof valve 1021. The opening area away from the explosion-proof valve 1021 can be 1.1 to 3 times, or 1.2 to 2 times, the opening area near the explosion-proof valve 1021, to reduce the risk of excessive reduction in the solid area of ​​the buffer element 110 while improving the flow guiding capacity.

[0202] Optionally, the guide surface 1104 may have a preset tilt angle relative to the second direction B. The preset tilt angle may be 5° to 60°, or 10° to 45°. If the tilt angle is too small, the expansion effect of the guide surface 1104 is not obvious; if the tilt angle is too large, the airflow may still generate strong impacts at local locations, and the solid area of ​​the buffer 110 on the side near the sampling circuit board 104 will be significantly reduced. Therefore, a suitable tilt angle of the guide surface 1104 can be selected based on the thickness of the buffer 110, the size of the explosion-proof valve 1021, the opening pressure of the explosion-proof valve 1021, the heat resistance of the buffer 110 material, and the size of the avoidance structure 106 of the sampling circuit board 104. The guide surface 1104 may also adopt a rounded transition to reduce stress concentration and airflow disturbance at sharp corners.

[0203] Optionally, the flow guiding surface 1104 may be provided with a heat-resistant layer, a flame-retardant layer, or a protective coating. Since the flow guiding surface 1104 directly faces the high-temperature, high-pressure gas after the explosion-proof valve 1021 is opened, the area where the flow guiding surface 1104 is located may be subjected to high thermal shock. By providing a mica layer, a ceramicized silicone layer, a heat-resistant adhesive layer, a flame-retardant coating, a metal foil layer, or a heat-insulating coating on the flow guiding surface 1104, the heat resistance and erosion resistance of the buffer component 110 under exhaust conditions can be improved. The protective layer can cover all or part of the flow guiding surface 1104, especially the end near the explosion-proof valve 1021, to reduce the direct impact of high-temperature gas on the substrate of the buffer component 110.

[0204] Optionally, the flow guide surface 1104 can be integrally formed with the buffer 110, or it can be formed through post-processing. For example, the buffer 110 can be formed into a buffer clearance structure 1102 with a gradually expanding inner wall by die cutting, punching, hot pressing, compression molding, injection molding, foaming, or machining. For foam or rubber buffers 110, the flow guide surface 1104 can be formed by beveling, stamping, or die forming; for silicone pads or injection molded parts, a conical or flared flow guide surface 1104 can be directly formed by die forming. By integrally forming the flow guide surface 1104, additional parts and assembly processes can be reduced, and the shape consistency of the flow guide surface 1104 is improved.

[0205] Optionally, the buffer avoidance structure 1102 can correspond to multiple explosion-proof valves 1021, and the flow guiding surface 1104 can gradually expand in the direction away from each explosion-proof valve 1021. For example, when the buffer avoidance structure 1102 is an elongated groove extending along the first direction A, the two opposing inner walls of the elongated groove can each form a flow guiding surface 1104, and the groove width gradually increases in the direction away from the explosion-proof valve 1021; when the buffer avoidance structure 1102 includes multiple buffer holes, the inner wall of each buffer hole can form a flow guiding surface 1104. In this way, multiple battery cell 102 explosion-proof valves 1021 can all obtain good flow guiding effects, and the exhaust will not be blocked due to the inner wall of the buffer avoidance structure 1102 corresponding to a certain explosion-proof valve 1021 being too narrow.

[0206] In some embodiments, the clearance structure 106 penetrates the sampling circuit board 104 along the second direction B. That is, the clearance structure 106 can be formed as a through hole, through groove, hollow area, clearance window, or through notch penetrating the thickness direction of the sampling circuit board 104. Since the sampling circuit board 104 is disposed on one side of the battery cell 102 in the second direction B, and the explosion-proof valve 1021 also faces the side where the second direction B is located, the clearance structure 106 penetrating the sampling circuit board 104 along the second direction B can form a through exhaust clearance space between the explosion-proof valve 1021 and the side of the sampling circuit board 104 away from the battery cell 102, so that the gas after the explosion-proof valve 1021 is opened can directly pass through the corresponding area of ​​the sampling circuit board 104 and be discharged.

[0207] The clearance structure 106 penetrates the sampling circuit board 104 along the second direction B, allowing the clearance structure 106 to form openings on both the side of the sampling circuit board 104 closest to the battery cell 102 and the side furthest from the battery cell 102. When the explosion-proof valve 1021 is open, the high-temperature, high-pressure gas discharged from the explosion-proof valve 1021 can enter the clearance structure 106 from the side of the sampling circuit board 104 closest to the battery cell 102 and exit from the side of the sampling circuit board 104 furthest from the battery cell 102. Compared to structures that only form grooves or locally thinned areas on the surface of the sampling circuit board 104, the through-type clearance structure 106 can provide greater flow capacity and reduce the risk of gas being blocked by the sampling circuit board 104 or trapped between the sampling circuit board 104 and the battery cell 102.

[0208] Optionally, the clearance structure 106 penetrates the first plate 1042 along the second direction B. The first plate 1042 extends along the first direction A and is disposed corresponding to multiple battery cells 102, and multiple explosion-proof valves 1021 can be arranged along the first direction A. When the clearance structure 106 penetrates the first plate 1042 along the second direction B, it can form through holes, elongated through slots, or multiple spaced through holes corresponding to the multiple explosion-proof valves 1021, so that at least part of the multiple explosion-proof valves 1021 is exposed, or even completely exposed. Through this structure, the first plate 1042 can provide a through-flow pressure relief channel for multiple explosion-proof valves 1021 while carrying the sampling line 1041.

[0209] Optionally, the clearance structure 106 penetrates the second plate 1044 along the second direction B. Since the second plate 1044 is located at one end of the first plate 1042 in the first direction A and is used to collect multiple sampling lines 1041, the second plate 1044 may be adjacent to or partially overlap with the explosion-proof valve 1021 of the end cell 1024. By providing the clearance structure 106 on the second plate 1044 through the second direction B, the explosion-proof valve 1021 of the end cell 1024 can be exposed at least partially through the through structure, reducing the obstruction of the second plate 1044 on the pressure relief and venting of the end cell 1024. This structure can be configured to cover an area of ​​the second plate 1044 less than or equal to 30% of the explosion-proof valve 1021 to further control the influence of the second plate 1044 on the explosion-proof valve 1021.

[0210] The clearance structure 106 penetrates the sampling circuit board 104 along the second direction B, and also facilitates the formation of a connected exhaust path with the buffer clearance structure 1102 on the buffer member 110. When the buffer member 110 is located between the sampling circuit board 104 and the battery cell 102, and the buffer member 110 is provided with a buffer clearance structure 1102 corresponding to the explosion-proof valve 1021, the gas discharged from the explosion-proof valve 1021 can pass through the explosion-proof valve 1021, the buffer clearance structure 1102, and the through clearance structure 106 of the sampling circuit board 104 in sequence. If the inner wall of the buffer clearance structure 1102 forms a guide surface 1104 that gradually expands away from the explosion-proof valve 1021, the gas can be guided by the guide surface 1104 and enter the through clearance structure 106, thereby forming a smoother pressure relief channel and reducing the risk of gas spreading laterally between the sampling circuit board 104 and the battery cell 102 or impacting other components.

[0211] Optionally, the clearance structure 106 penetrates the sampling circuit board 104 along the second direction B, and on a plane perpendicular to the second direction B, the minimum distance between the edge of the clearance structure 106 and the edge of the corresponding explosion-proof valve 1021 is not less than 1 mm. Through this combined arrangement, the through-type clearance structure 106 not only provides a flow path in the thickness direction but also provides sufficient edge clearance around the explosion-proof valve 1021. Thus, even with deviations in the position of the battery cell 102, installation deviations in the sampling circuit board 104, or compression deformation of the buffer 110, the explosion-proof valve 1021 can still reliably correspond to the through-type clearance structure 106, reducing the risk of the sampling circuit board 104's solid portion obstructing the explosion-proof valve 1021.

[0212] Optionally, when the avoidance structure 106 penetrates the sampling circuit board 104 along the second direction B, the sampling line 1041 can be arranged around the periphery of the avoidance structure 106. Since the through-type avoidance structure 106 occupies a portion of the sampling circuit board 104, the sampling line 1041 can extend along the outer edge of the avoidance structure 106 and maintain a preset insulating distance from the avoidance structure 106. Optionally, a reinforcing region 1048 can be provided between the edge of the avoidance structure 106 and the sampling line 1041 in the sampling circuit board 104. The thickness of the reinforcing region 1048 is greater than the thickness of other areas of the sampling circuit board 104 to improve the mechanical strength of the edge of the avoidance structure 106 and reduce the risk of cracks at the edge of the through structure propagating to the sampling line 1041.

[0213] Optionally, after the avoidance structure 106 penetrates the sampling circuit board 104 along the second direction B, the edges of the avoidance structure 106 can be chamfered, rounded, have a flame-retardant layer, a heat-resistant layer, or a reinforcing layer. Chamfers or rounded corners can reduce stress concentration at the edges of the avoidance structure 106, reducing the likelihood of the sampling circuit board 104 cracking at the edges during vibration, impact, or thermal cycling; flame-retardant or heat-resistant layers can reduce the risk of high-temperature gas ablation at the edges of the avoidance structure 106 when the explosion-proof valve 1021 is opened; reinforcing layers can improve the bending, tearing, and impact resistance of the peripheral area of ​​the through-type avoidance structure 106. The above structures can be selected according to the material of the sampling circuit board 104 and the size of the explosion-proof valve 1021.

[0214] like Figure 9 As shown, in another embodiment of this application, an energy storage device 200 is provided. The energy storage device 200 includes any of the above-mentioned battery devices 100, which are used to store electrical energy. By employing the battery devices 100, the energy storage device 200 can store electrical energy using multiple battery cells 102. The status of the multiple battery cells 102 is sampled and monitored through a sampling circuit board 104, a sampling line 1041, a conductive connector 1084, and a collection terminal 1045. At the same time, through structures such as an avoidance structure 106 and a buffer avoidance structure 1102, the explosion-proof valve 1021 has a reliable pressure relief channel, thereby improving the electrical reliability and safety of the energy storage device 200.

[0215] The energy storage device 200 can be a battery pack, energy storage battery cabinet, energy storage container, residential energy storage equipment, industrial and commercial energy storage equipment, communication base station energy storage equipment, mobile energy storage equipment, vehicle energy storage system, backup power system, uninterruptible power supply system, or other device used for storing and releasing electrical energy. The battery device 100 can serve as the basic energy storage unit of the energy storage device 200, or multiple battery devices 100 can be connected in series, parallel, or a series-parallel combination to meet different voltage, capacity, and power requirements. The battery device 100 is used to store electrical energy and can output electrical energy to external loads, electrical equipment 300, the power grid, inverters, or power conversion equipment when needed.

[0216] The energy storage device 200 includes any of the aforementioned battery devices 100, and therefore can possess the corresponding structure and technical effects of the aforementioned battery devices 100. For example, the battery device 100 includes a plurality of battery cells 102 arranged adjacent to each other along a first direction A. Each battery cell 102 is equipped with an explosion-proof valve 1021. A sampling circuit board 104 is disposed on one side of the plurality of battery cells 102 along a second direction B. The sampling circuit board 104 is equipped with a clearance structure 106, which is correspondingly disposed with at least a portion of the explosion-proof valves 1021, exposing at least a portion of the corresponding explosion-proof valves 1021. Thus, during the operation of the energy storage device 200, when a battery cell 102 malfunctions and depressurizes through the explosion-proof valve 1021, the explosion-proof valve 1021 can discharge gas through the clearance structure 106, reducing the obstruction of the exhaust path by the sampling circuit board 104 and improving the thermal runaway pressure relief safety of the energy storage device 200.

[0217] Optionally, the battery device 100 in the energy storage device 200 may include a first plate 1042 and a second plate 1044. The battery management system in the energy storage device 200 can centrally acquire voltage, temperature, or status signals from multiple battery cells 102 through the collection terminal 1045, reducing the number of wiring harnesses and improving signal acquisition efficiency. For the energy storage device 200, which requires long-term stable operation, the integrated sampling structure can reduce the risk of loose wiring harnesses, misconnections, and wear.

[0218] Optionally, the battery device 100 in the energy storage device 200 may include electrode terminals 1082 and conductive connectors 1084, enabling the energy storage device 200 to quickly complete the sampling connection of multiple cells 102 during the production and assembly process, and improving the connection reliability under long-term vibration, thermal cycling or maintenance conditions.

[0219] Optionally, the battery device 100 in the energy storage device 200 may include a reinforcement region 1048. Since the energy storage device 200 typically needs to operate for extended periods and may experience charge-discharge cycles, temperature variations, and mechanical vibrations, the reinforcement region 1048 can improve the crack and deformation resistance around the avoidance structure 106, reduce the likelihood of edge damage to the avoidance structure 106 affecting the sampling line 1041, thereby improving the sampling reliability of the energy storage device 200.

[0220] Optionally, the battery unit 100 in the energy storage device 200 may include a buffer 110, which helps the energy storage device 200 maintain structural stability and smooth venting during long-term operation and abnormal pressure relief conditions.

[0221] Optionally, the energy storage device 200 may also include a battery management system, a power conversion unit, an inverter, a fire suppression system, a thermal management system, a controller, a busbar assembly, a relay, a fuse, a power distribution unit, a communication module, or an external interface. The battery management system can be electrically connected to the collection terminal 1045 of the battery device 100 to acquire sampling signals transmitted through multiple sampling lines 1041, and perform voltage monitoring, temperature monitoring, equalization control, fault diagnosis, or charge / discharge protection on the battery cells 102 based on the sampling signals. Since the sampling lines 1041 of the battery device 100 are concentrated at the collection terminal 1045, the connection between the battery management system and the battery device 100 is simpler, which is beneficial for the internal wiring and maintenance of the energy storage device 200.

[0222] like Figure 10 As shown, in another embodiment of this application, an electrical device 300 is provided, which includes any of the above-mentioned battery devices 100, which is used to provide electrical energy. By employing the battery device 100, the electrical device 300 can supply power to electrical loads, drive systems, control systems, or auxiliary systems, and can sample and monitor the status of multiple battery cells 102 through the sampling circuit board 104, sampling line 1041, conductive connector 1084, and collection terminal 1045 in the battery device 100. At the same time, the avoidance structure 106, buffer avoidance structure 1102, and other structures facilitate the explosion-proof valve 1021 to have reliable venting space, thereby improving the power supply reliability and usage safety of the electrical device 300.

[0223] Electrical equipment 300 can be vehicles, construction machinery, ships, drones, robots, power tools, home appliances, mobile terminals, communication equipment, energy storage terminals, lighting equipment, medical equipment, rail transit equipment, aviation equipment, or other equipment that uses battery device 100 as a power source. Battery device 100 can serve as the main power source for electrical equipment 300, or as a backup power source, auxiliary power source, or emergency power source. Battery device 100 provides electrical energy and can supply power to motors, controllers, sensors, actuators, communication modules, display modules, thermal management systems, or other electrical loads within electrical equipment 300.

[0224] Electrical equipment 300 includes any of the aforementioned battery devices 100, and therefore can possess the corresponding structure and technical effects of the aforementioned battery devices 100. For example, the battery device 100 includes a plurality of battery cells 102 arranged adjacent to each other along a first direction A. Each battery cell 102 is equipped with an explosion-proof valve 1021. A sampling circuit board 104 is disposed on one side of the plurality of battery cells 102 in a second direction B. The sampling circuit board 104 is equipped with a clearance structure 106, which is correspondingly disposed with at least a portion of the explosion-proof valves 1021, exposing at least a portion of the corresponding explosion-proof valves 1021. Thus, when an abnormality occurs in a battery cell 102 during the operation of electrical equipment 300 and triggers the opening of the explosion-proof valve 1021, the explosion-proof valve 1021 can vent more smoothly through the clearance structure 106, reducing the risk of poor pressure relief caused by the sampling circuit board 104 blocking the explosion-proof valve 1021, thereby improving the safety of electrical equipment 300.

[0225] Optionally, the battery device 100 can be installed in the battery compartment, chassis, frame, housing, mounting cavity, power battery box, or power supply compartment of the electrical equipment 300. The outer shell of the battery device 100 can be fixedly connected to the mounting structure of the electrical equipment 300 to withstand vibration, impact, or attitude changes during operation. For mobile electrical equipment 300 such as vehicles, drones, and robots, the battery device 100 may be subjected to vibration or impact for a long time during operation. Therefore, the sampling circuit board 104 and the battery cell 102 are provided with a buffer 110, a conductive connector 1084 is fixedly connected to the sampling circuit board 104, and a reinforcing area 1048 is located at the edge of the avoidance structure 106. These structures can improve the reliability of the sampling connection and the board structure under dynamic operating conditions.

[0226] Optionally, the power device 300 may also include a battery management system, which is electrically connected to the collection terminal 1045 of the battery device 100. Because the sampling circuit board 104 has integrated sampling lines 1041 and collection terminals 1045, the number of internal wiring harnesses in the power device 300 can be reduced, and the connection between the battery management system and the battery device 100 is simpler and more reliable.

[0227] Optionally, the battery device 100 may include electrode terminals 1082 and conductive connectors 1084. During assembly or maintenance, the electrical equipment 300 can quickly complete the sampling connection of the battery cell 102 through the integrated structure, reducing the risk of misconnection, omission, or loosening of the sampling line 1041, thereby improving the production efficiency and maintenance convenience of the electrical equipment 300.

[0228] Optionally, the clearance structure 106 of the battery device 100 can penetrate the sampling circuit board 104 along the second direction B. When the battery cell 102 is abnormally depressurized, the electrical device 300 can reduce the impact of high-temperature and high-pressure gas on the sampling circuit board 104, sampling line 1041 and buffer 110, which is conducive to the gas being discharged along a predetermined path.

[0229] Optionally, the electrical device 300 may include a thermal management system or a ventilation system. The housing of the battery device 100 may have an air inlet, which is connected to the air duct, cooling channel, heat dissipation chamber, exhaust channel, or external environment of the electrical device 300. Through this structure, the electrical device 300 can guide gas into the interior of the battery device 100 to dissipate heat from the battery cell 102, sampling circuit board 104, or other components; when the explosion-proof valve 1021 is open, it can also work with the internal pressure relief space and exhaust path to allow the gas to flow and be discharged more smoothly. For electrical devices 300 with high power requirements or large ambient temperature variations, this structure can improve the thermal management capability and safety of the battery device 100.

[0230] Optionally, the electrical device 300 can be a vehicle, and the battery device 100 is used to provide electrical energy to the vehicle's drive motor, vehicle controller, air conditioning system, low-voltage electrical system, or other on-board electrical components. During vehicle operation, vibration, impact, and temperature changes occur. Employing a battery device 100 with a buffer 110, a reinforcing zone 1048, a conductive connector 1084 fixing structure, and an exhaust clearance structure 106 can improve the sampling reliability and pressure relief safety of the vehicle's battery system. Optionally, the electrical device 300 can be a drone, robot, or power tool, and the battery device 100 is used to provide the electrical energy required for movement or operation, and the aforementioned structure improves connection stability under high-frequency vibration or attitude change conditions.

[0231] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0232] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: Multiple battery cells are arranged adjacent to each other along a first direction, and each battery cell is provided with an explosion-proof valve on one end surface in a second direction. A sampling circuit board, at least a portion of which is disposed on one side of the plurality of battery cells in the second direction and on the same side of the battery cells as the explosion-proof valve; An avoidance structure is provided on the sampling circuit board. The avoidance structure is correspondingly provided with at least a portion of the explosion-proof valves. On a plane perpendicular to the second direction, the projection of at least a portion of the explosion-proof valves is located within the range of the avoidance structure, so that at least a portion of the corresponding explosion-proof valves are exposed. Wherein, the first direction and the second direction are different, the sampling circuit board includes a first plate and a second plate connected together, the second plate is disposed at one end of the first plate in the first direction, one of the multiple battery cells located at one end in the first direction is the end battery cell, the avoidance structure further includes: a second avoidance structure disposed on the second plate, the second plate overlaps with the projection portion of the explosion-proof valve of the end battery cell in the second direction, the second avoidance structure is correspondingly disposed with the explosion-proof valve of the end battery cell so that at least a part of the explosion-proof valve of the end battery cell is exposed.

2. The battery device according to claim 1, characterized in that, The first plate extends along the first direction, a portion of the second plate is located on one side of the battery cell in the second direction, and a portion of the second plate is located on one side of the battery cell in the first direction.

3. The battery device according to claim 2, characterized in that, The avoidance structure includes: A first clearance structure is provided on the first plate. The first clearance structure is a through hole that penetrates the first plate. The first clearance structure is provided in correspondence with the plurality of explosion-proof valves so that at least a portion of the plurality of explosion-proof valves is exposed.

4. The battery device according to claim 1, characterized in that, The second plate covers a portion of the explosion-proof valve of the end cell, and the projected area of ​​the covered portion on a plane perpendicular to the second direction is less than or equal to 30% of the projected area of ​​the explosion-proof valve on that plane.

5. The battery device according to claim 1, characterized in that, The second plate has a collection terminal at the end away from the first plate. The sampling circuit board has multiple sampling lines, one end of which is used to connect to the battery cell, and the other end of which is connected to the collection terminal.

6. The battery device according to claim 5, characterized in that, The battery device also includes: The electrode terminals are located on the same side of the battery cell in the second direction as the explosion-proof valve. A conductive connector, one end of which is electrically connected to the electrode terminal, and the other end of which is connected to the sampling line.

7. The battery device according to claim 6, characterized in that, The conductive connector is fixedly connected to the sampling circuit board, and the conductive connector is electrically connected to the sampling line.

8. The battery device according to claim 5, characterized in that, The sampling circuit board has a reinforcement area at the edge of the avoidance structure, the reinforcement area is located between the avoidance structure and the sampling line, and the thickness of the reinforcement area is greater than the thickness of other areas of the sampling circuit board.

9. The battery device according to claim 1, characterized in that, The first plate is elongated; or, the dimension of the end of the first plate facing the second plate in a third direction is greater than the dimension of the end of the first plate away from the second plate in a third direction. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

10. The battery device according to claim 1, characterized in that, The first plate is located on the side of the plurality of explosion-proof valves facing upwards, and the clearance structure is provided corresponding to the plurality of explosion-proof valves; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

11. The battery device according to any one of claims 1 to 10, characterized in that, On a plane perpendicular to the second direction, the minimum distance between the edge of the avoidance structure and the corresponding edge of the explosion-proof valve is not less than 1 mm.

12. The battery device according to any one of claims 1 to 10, characterized in that, The battery device also includes: A buffer is disposed between the sampling circuit board and the battery cell, and the buffer is in contact with both the sampling circuit board and the battery cell. The buffer component is provided with a buffer avoidance structure corresponding to the explosion-proof valve.

13. The battery device according to claim 12, characterized in that, The inner wall of the buffer avoidance structure forms a flow guiding surface, which gradually expands in a direction away from the explosion-proof valve.

14. The battery device according to any one of claims 1 to 10, characterized in that, The avoidance structure penetrates the sampling circuit board along the second direction.

15. An energy storage device, characterized in that, include: The battery device according to any one of claims 1 to 14, wherein the battery device is used to store electrical energy.

16. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

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