Battery device and electric device

Abstract

The application belongs to the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body, a plurality of battery monomers and an output pole. The box body has a containing space. The plurality of battery monomers are arranged in a stacked manner to form a battery monomer group. The output pole comprises an output pole first component. The output pole first component comprises a seat body and a stand column. The stand column is connected to the seat body and protrudes from the surface of the seat body. The seat body is electrically connected to the battery monomers. The application can reduce the dependence on an end plate and the structural complexity of the connection position of the output pole.

Description

Technical Field

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

[0002] In the field of new energy, battery devices are the core components for energy storage and output, and their structural design directly affects overall performance. In existing battery devices, the output electrode uses a single metal sheet and is bolted to the end plate, making the fixation of the output electrode overly dependent on the end plate, and the combined structure of the output electrode and the end plate is too complex. Summary of the Invention

[0003] The purpose of this application is to provide a battery device and an electrical device that aims to solve the technical problem that the fixation of the output electrode relies too much on the end plate, resulting in an overly complex structure of the output electrode and the end plate.

[0004] The technical solution adopted in the embodiments of this application is: In a first aspect, this application provides a battery device, comprising: The enclosure has storage space; Multiple battery cells are stacked together to form a battery cell group; The output electrode includes an output electrode first component, which includes a base portion and a post portion. The post portion is connected to the base portion and protrudes from the surface of the base portion. The base portion is electrically connected to a battery cell.

[0005] In this embodiment, the output electrode of the battery device adopts the structure of the first output electrode component. The column part of the first output electrode component is convenient for electrical connection with external electrical components, and the base part of the first output electrode component can be electrically connected with the battery cell. This allows the first output electrode component to be stably arranged in the battery device without the need for limiting parts and bolt assemblies, which helps to reduce the dependence of the output electrode on the end plate and simplify the structure.

[0006] In one embodiment, the battery device further includes a second output electrode component, which is connected to the terminal post and the base portion of the battery cell, respectively, and the base portion is fixedly connected to the second output electrode component.

[0007] In this embodiment, the output electrode of the battery device adopts a combination of a first output electrode component and a second output electrode component. The column portion of the first output electrode component facilitates electrical connection with external electrical components. The second output electrode component connects to the battery cell and also connects to and limits the base portion of the first output electrode component. This allows the first output electrode component to be stably arranged in the battery device without the need for end plates and bolt assemblies, which helps reduce the dependence of the output electrode on end plates and simplifies the combination design between the first and second output electrode components, thus simplifying the structure.

[0008] In one embodiment, the base portion is a layered sheet structure.

[0009] In this embodiment, the layered design facilitates subsequent bending and processing of the base body, and has a positive effect on reducing internal resistance and equalizing flow.

[0010] In one embodiment, the base includes a first part, a bent part, and a second part, with the bent part connected between the first part and the second part; the first part and the second part are staggered along the height direction of the battery cell; the column part is connected to the first part, and the output electrode second component is connected to the second part.

[0011] In this embodiment, the first and second parts of the seat are staggered, which can make more reasonable use of the space in the height direction, reduce the generation of redundant space, and improve the space utilization rate.

[0012] In one embodiment, the output electrode second component overlaps with and is welded to the second portion.

[0013] In this embodiment, the overlapping method not only realizes the electrical connection between the second output electrode component and the second part, but also plays a more effective limiting role for the second part, which can further limit the displacement of the base part and ensure the stability of the connection between the first output electrode component and the second output electrode component.

[0014] In one embodiment, the housing includes a frame and a support plate connected to the frame, the frame and the support plate together enclosing a receiving space; the output electrode is disposed on the side of the battery cell away from the support plate, and the column portion extends in a direction away from the top.

[0015] In this embodiment, the base and the column are located on the side of the battery cell away from the support plate, which saves space inside the battery device and facilitates the connection of the column with electrical components located outside the battery device, thus improving the ease of connection.

[0016] In one embodiment, the battery device further includes a limiting bracket having a limiting structure connected to the second output electrode component and / or the base portion.

[0017] In this embodiment, by adding a limiting bracket, the limiting structure can further position and limit the second output electrode component and the base, thereby improving the structural stability of the second output electrode component and the first output electrode component. In addition, the limiting brackets can also serve as insulation, reducing the risk of short circuits between the first output electrode component and the second output electrode component and other metal structures.

[0018] In one embodiment, the battery device further includes a circuit board and a busbar component, with multiple battery cells electrically connected to each other via the busbar component; at least one of the output electrode second component and the limiting bracket is thermoformed into an integral structure with the circuit board and the busbar component.

[0019] In this embodiment, at least one of the second output electrode component and the limiting bracket is thermoformed into an integral structure with the circuit board and the bus component. This reduces the number of connection points between components, lowers contact resistance and the risk of failure, and improves the overall reliability of the battery device. The thermoforming process ensures tight connections between components and a compact structure, which helps save internal space in the battery device and improves its energy density.

[0020] In one embodiment, the limiting bracket includes a limiting plate portion and a limiting structure connected to the edge of the limiting plate portion. The limiting plate portion covers a portion of the battery cell, and a rib structure is arranged on the side of the limiting plate portion facing the battery cell.

[0021] In this embodiment, by arranging rib structures on the side of the limiting plate facing the battery cell, the deformation resistance of the limiting bracket is improved, thereby enabling the limiting bracket to have better support and limiting functions.

[0022] In one embodiment, the battery device further includes an output electrode cover, which includes a cover portion and a sleeve portion connected to the cover portion. The cover portion covers at least the base portion and at least a portion of the second output electrode component, and the sleeve portion is sleeved on the outside of the column portion.

[0023] In this embodiment, the output electrode cover can serve as electrical insulation, reducing the risk of short circuits between the column, the base, and the second output electrode component and surrounding electrical components. Furthermore, the output electrode cover protects the base and the second output electrode component, preventing dust, moisture, etc., from entering the connection area and affecting conductivity and connection reliability.

[0024] In one embodiment, the cover portion has an assembly hole, the sleeve portion is disposed on the assembly hole, and the output electrode second component has an edge side near the assembly hole, with a gap between the edge side and the hole wall of the assembly hole.

[0025] In this embodiment, by controlling the gap between the edge of the second output electrode component and the wall of the assembly hole, the risk of insulation failure and short circuit between the second output electrode component and the cover can be effectively reduced, thus ensuring the stable operation of the battery device.

[0026] In one embodiment, the battery device further includes a jumper assembly electrically connected to the circuit board, with a clearance hole formed on the cover corresponding to the position of the jumper assembly, the cover covering the jumper assembly, and the jumper assembly being at least partially disposed within the clearance hole.

[0027] In this embodiment, the clearance hole ensures that the output cover covers the base and the second output component without interfering with the normal operation of the jumper assembly, thus guaranteeing the circuit connection function of the jumper assembly. The partial coverage of the jumper assembly by the cover also provides some protection, reducing the impact of external factors.

[0028] In one embodiment, the jumper assembly is disposed on the limiting bracket, and the cover portion covers the jumper assembly and the limiting bracket.

[0029] In this embodiment, the cover can be placed on the limiting bracket and the jumper assembly, and can avoid the conductive parts of the jumper assembly by opening avoidance holes. While protecting the limiting bracket and the jumper assembly, it can also ensure the normal operation of the jumper assembly.

[0030] In one embodiment, the battery device further includes a cover film that covers the base portion; or, the cover film covers both the base portion and the second output electrode component.

[0031] In this embodiment, compared to the output electrode cover, the cover film has a simpler structure, is easier to manufacture and install, and helps to reduce the production cost of the battery device.

[0032] In one embodiment, a plurality of battery cells are stacked along a first direction and form two ends; the housing includes at least a limiting member disposed at one end along the first direction; and the base portion is at least partially connected to the limiting member.

[0033] In this embodiment, the base is connected to the limiting member, which provides more stable support for the first output electrode component and improves its vibration and impact resistance.

[0034] In one embodiment, the limiting member has a recess on the side facing the seat portion, and the seat portion is at least partially disposed in the recess.

[0035] In this embodiment, by providing a recessed portion at the top of the limiting member, the seat portion can be at least partially disposed inside the recessed portion, which helps to reduce the space occupied by the first output electrode component in the height direction of the battery device and improves space utilization.

[0036] In one embodiment, the battery device further includes an insulating sheet disposed at least between the base portion and the recessed portion.

[0037] In this embodiment, the insulating sheet serves as an insulating barrier, preventing electrical continuity between the base and the end plate components and reducing the probability of short-circuit faults. Additionally, the insulating sheet reduces friction and wear between the base and the limiting component.

[0038] In one embodiment, the limiting member is a die-cast end plate, and the housing also includes a side plate, which is connected to the side plate to jointly enclose and form an accommodating space.

[0039] In this embodiment, by adopting the connection method of die-cast end plates and side plates, the structural strength and deformation resistance of the box can be improved.

[0040] In one embodiment, a plurality of battery cells are stacked along a first direction, and an explosion-proof valve is provided on the side of the battery cell located at the end facing the base portion; at least a portion of the base portion is arranged opposite to the explosion-proof valve; the battery device also includes an insulating cover, at least a portion of which is disposed between the explosion-proof valve and at least a portion of the base portion.

[0041] In this embodiment, the insulating cover can reduce the risk of short circuit between the first component of the output electrode and the explosion-proof valve.

[0042] In one embodiment, the insulating cover includes a first sheet portion and a second sheet portion connected to the first sheet portion, the first sheet portion and the second sheet portion being arranged at an angle, the first sheet portion being attached to the side wall of the battery cell, and the second sheet portion being disposed between the explosion-proof valve and at least part of the seat portion.

[0043] In this embodiment, the first piece attached to the side wall provides a stable support for the entire insulating cover, allowing the second piece to be reliably positioned between the explosion-proof valve and the seat, thus fully exerting its protective function; the angled arrangement structure allows the insulating cover to be installed more stably on the battery cell, further improving the protective effect of the insulating cover.

[0044] In one embodiment, the battery device further includes a circuit board and an information acquisition component. The battery cell has a monitoring window, and the information acquisition component is disposed on the monitoring window and connected to the battery cell. The circuit board includes a main body and a flanged portion, both of which are provided with circuit structures. The main body extends along a first direction and is provided with a first side and a second side opposite to each other. The monitoring window is disposed close to the first side. The flanged portion is connected to the second side of the main body and extends from the second side to the first side and is electrically connected to the information acquisition component. The first direction, the second direction, and the third direction are perpendicular to each other.

[0045] In this embodiment, by setting a flange on the circuit board, the side of the circuit board away from the monitoring window can also be electrically connected to the monitoring window without changing the original circuit layout of the circuit board, which expands the application range of the circuit board and helps to save manufacturing costs.

[0046] In one embodiment, the battery device further includes a circuit board electrically connected to each battery cell, the circuit board being disposed on the side of the battery cell near the base portion; the output electrode second component has a recessed portion, and the circuit board is connected to the output electrode second component and confined on the recessed portion.

[0047] In this embodiment, by providing a recessed portion on the second component of the output electrode, the circuit board can be accommodated and limited, which is beneficial for matching the height of the circuit board and improving the stability of the circuit board.

[0048] Secondly, this application provides an electrical device, which includes a battery device as described in any of the above claims, the battery device being used to store or provide electrical energy.

[0049] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments; Figure 2 This is an exploded view of the battery device provided in some embodiments of this application; Figure 3 Schematic diagram of partial structure of battery device provided in some embodiments of this application Figure 1 ; Figure 4 for Figure 3 A schematic diagram of the decomposed structure; Figure 5 Schematic diagram of partial structure of battery device provided in some embodiments of this application Figure 2 ; Figure 6 This is a schematic diagram showing the connection between the first output terminal component and the second output terminal component in a battery device provided in some embodiments of this application; Figure 7 A schematic diagram of the structure of the first output terminal component in a battery device provided in some embodiments of this application; Figure 8 This application provides schematic diagrams illustrating the connection between the first output electrode component, the second output electrode component, the limiting bracket, and the busbar component in a battery device according to some embodiments. Figure 1 ; Figure 9 This application provides schematic diagrams illustrating the connection between the first output electrode component, the second output electrode component, the limiting bracket, and the busbar component in a battery device according to some embodiments. Figure 2 ; Figure 10 This is a schematic diagram of the structure of the limiting bracket in the battery device provided in some embodiments of this application; Figure 11 for Figure 10 A structural diagram viewed from below; Figure 12 This is a schematic diagram of the structure of the circuit board, the busbar component, the second output electrode component, and the limiting bracket after hot pressing in some embodiments of the battery device provided in this application; Figure 13 for Figure 12 A schematic diagram of the decomposed structure; Figure 14 This is a schematic diagram showing the connection between the output electrode cover and the limiting bracket, the first output electrode component, and the second output electrode component in a battery device provided in some embodiments of this application. Figure 15 for Figure 14 Top view; Figure 16 This is a schematic diagram illustrating the connection between the output electrode cover and the second output electrode component in a battery device provided in some embodiments of this application. Figure 17 This is a schematic diagram illustrating the connection between the cover film and the second output electrode component and the first output electrode component in a battery device provided in some embodiments of this application. Figure 18This is a schematic diagram of the structure of the limiting member in a battery device provided in some embodiments of this application; Figure 19 This is a schematic diagram of the structure of the insulating sheet in a battery device provided in some embodiments of this application; Figure 20 This is a schematic diagram of the structure of a single battery cell in a battery device provided in some embodiments of this application; Figure 21 This is a schematic diagram of the structure of the insulating cover in a battery device provided in some embodiments of this application; Figure 22 This is a schematic diagram showing the connection between the insulating cover, battery cell, and limiting member in a battery device provided in some embodiments of this application; Figure 23 This is a schematic diagram of the circuit board structure in a battery device provided in some embodiments of this application; Figure 24 This is a schematic diagram of the circuit arrangement of the circuit board on the blank before flanging in a battery device provided in some embodiments of this application.

[0052] Explanation of reference numerals in the attached figures: 1000. Vehicle; 1100. Battery assembly; 1110. Housing; 1111. Housing cover; 1112. Housing frame; 1113. Compartment; 1114. Support plate; 1115. Frame; 1120. Battery cell pack; 1121. Battery cell; 11211. Explosion-proof valve; 11212. Convex structure; 11213. Terminal post; 11214. Monitoring window; 1122. First output terminal component; 1122 1. Base body; 11222. Column body; 11223. First part; 11224. Second part; 11225. Bending part; 1123. Second output terminal component; 11231. Recessed part; 11232. Edge side; 11233. Overlapping position; 1124. Limiting bracket; 11241. Limiting structure; 11242. Limiting plate body; 11243. Rib structure; 1125. Circuit board; 11251. 11252. Flanged edge; 11253. Second side; 11254. First side; 11255. Preset circuit; 11256. Main body; 1126. Busbar component; 1127. Output cover; 11271. Cover part; 11272. Sleeve part; 11273. Clearance hole; 11274. Hole wall of assembly hole; 11275. Assembly hole; 1128. Jumper board assembly; 1129. Cover film; 1130. Limiting component; 1130 1. Recessed portion; 1131. Insulating sheet; 1132. Insulating cover; 11321. First sheet body; 11322. Second sheet body; 1133. Side plate; 1134. Hot-press film; 11341. Upper hot-press film; 11342. Lower hot-press film; 1135. Information acquisition component; 1136. Output pole; 1200. Controller; 1300. Motor; X, First direction; Y, Second direction; Z, Third direction; L, Gap. Detailed Implementation

[0053] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0055] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0059] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0061] In the field of new energy, battery devices, as the core component for energy storage and output, have their structural design directly affecting overall performance. In existing battery devices, the output electrode is connected to the external circuit using a single metal sheet, and is bolted to an end plate. End plates are typically located at both ends of the battery device, distributed along the arrangement of the individual battery cells. Usually, mounting holes are provided on the end plate, into which the output electrode is inserted and secured with bolts. In some cases, mounting brackets are also required to support the output electrode, resulting in a complex structure with numerous redundancies between the output electrode and the end plate. The excessive reliance on the end plate for fixing the output electrode contributes to the overly complex structure of both the output electrode and the end plate.

[0062] Therefore, this application provides a battery device in which an output electrode first component is provided. The output electrode first component has a column portion connected to an external circuit and a base portion electrically connected to a battery cell. This allows the output electrode first component to electrically connect the battery cell to the base portion without being connected to an end plate. As a result, the output electrode first component does not need to be limited by an end plate and bolt assembly, reducing the dependence of the output electrode on the end plate and simplifying the connection structure between the output electrode and the end plate.

[0063] Specifically, refer to Figure 3 As shown, this application embodiment provides a battery device 1100, which includes one or more battery cells 1121. Multiple battery cells 1121 are connected in series, parallel, or a combination of series and / or parallel connections to form the battery device 1100. Of course, the multiple battery cells 1121 can also be equipped with functional units of corresponding structural components, electrical connections, and auxiliary components. For example, multiple battery cells 1121 can be connected in series, parallel, or series-parallel connections through a busbar 1126.

[0064] Reference Figure 2 As shown in the illustration, this application also provides a battery device 1100. The battery device 1100 disclosed in this application can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0066] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0067] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] According to some embodiments of this application, refer to Figure 3-5 As shown, this application embodiment provides a battery device 1100, which includes a housing 1110, an output electrode, and a plurality of battery cells 1121. The housing 1110 has an accommodating space 1113. The plurality of battery cells 1121 are stacked to form a battery cell group 1120. The output electrode 1136 includes an output electrode first component 1122, which includes a base portion 11221 and a post portion 11222. The post portion 11222 is connected to the base portion 11221 and protrudes from the surface of the base portion 11221. The base portion 11221 is electrically connected to the battery cell 1121.

[0069] Specifically, refer to Figure 3-5As shown, the battery device 1100 may include at least one battery cell 1121. Typically, the battery device 1100 includes a plurality of battery cells 1121 arranged in sequence. The stacking direction of the plurality of battery cells 1121 may be set as a first direction X. For a cubic battery cell 1121 (or for a prismatic battery), the first direction X may also be considered as the thickness direction of the battery cell 1121. The width direction of the battery cell 1121 may be considered as a second direction Y, and the height direction of the battery cell 1121 may be considered as a third direction Z. Any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Of course, for some battery devices 1100, the plurality of battery cells 1121 can be stacked in the first direction X to form a battery cell group 1120, and the plurality of battery cell groups 1120 can be further stacked in the second direction Y to form a matrix-like battery cell array. In this example, for ease of description, the battery device 1100 is described as including a column of battery cell groups 1120 stacked along the first direction X.

[0070] A battery cell 1121 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1121 can be a secondary battery cell 1121 or a primary battery cell 1121; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1121 can be cylindrical, flat, cuboid, or other shapes.

[0071] Typically, multiple battery cells 1121 are electrically connected by being connected in series, in parallel, or in a combination of series and parallel connections. For example, a busbar 1126 is configured between two adjacent battery cells 1121. The busbar 1126 is a conductive metal component, such as a copper bar or an aluminum bar.

[0072] Multiple battery cells 1121 form the overall output terminal of the battery device 1100 at one or both ends in the first direction X. Taking the battery device 1100 having only one output terminal as an example, the output terminal includes an output electrode first component 1122, as shown in the figure. Figure 6 and Figure 7As shown, the first output terminal component 1122 includes two parts: a base portion 11221, which is electrically connected to the battery cell 1121; and a post portion 11222, which is connected to the base portion 11221 and protrudes from the surface of the base portion 11221, such that the end of the post portion 11222 away from the base portion 11221 forms a connection terminal for connection with an external circuit structure. The base portion 11221 serves as a bridge for current transmission between the battery cell 1121 and the post portion 11222; therefore, the base portion 11221 is connected to the terminal post 11213 of the battery cell 1121, for example, by welding.

[0073] For example, in a specific example, refer to Figure 5-7 and Figure 20 As shown, the battery device 1100 includes a plurality of battery cells 1121 stacked in a row along a first direction X. The height direction (i.e., the third direction Z) of each battery cell 1121 is vertical. Each battery cell 1121 has a terminal post 11213 (including a positive terminal post and a negative terminal post), with the terminal post 11213 located at the top of the battery cell 1121. The stacking plane of the battery cells 1121 is the larger surface area (i.e., the plane with the larger lateral area) of the battery cell 1121. Along the first direction X, the output terminal 1136 of the battery device 1100 is located at one end of the battery device 1100; that is, the first output terminal component 1122 is positioned near the end of the battery cell 1121. The base portion 11221 is welded and fixed to the terminal post 11213 of the end battery cell 1121, and the upright portion 11222 is welded to the base portion 11221. To facilitate the connection of the column portion 11222 with external electrical components of the battery device 1100 and provide a basic interface for easy connection of current output, the protruding height of the column portion 11222 can be relatively high. For example, if the column portion 11222 is cylindrical, the length-to-diameter ratio (the ratio of height to diameter) of the column portion 11222 can be greater than 1.5, for example, any value between 3 and 10. For example, if the diameter of the column portion 11222 is 5mm, then the height of the column portion 11222 can be 10mm, 20mm, 30mm, etc.

[0074] In the first output component 1122, the base portion 11221 is made of a metal material, such as copper, aluminum, or an aluminum alloy. The base portion 11221 can be formed from a single piece of metal. To reduce the weight of the base portion 11221, a hollow structure can also be provided on the base portion 11221.

[0075] The column portion 11222 can be made of brass and is vertically connected to the center of the base portion 11221 via friction welding. The column portion 11222 can be divided into multiple segments along its height, each segment having a different diameter, thus creating a shoulder in the height direction to facilitate connection with external electrical components. For example, the column portion 11222 may include three parts in the height direction: a first column segment, a second column segment, and a third column segment connected sequentially. The third column segment is directly welded to the base portion 11221. The second column segment has the largest diameter, and the first column segment has the smallest diameter. In the radial direction, the second column segment forms a convex shoulder.

[0076] In this example, the battery device 1100 may or may not have a limiting member 1130 (which can be understood as an end plate). In this case, the first output electrode component 1122 no longer relies on the limiting member 1130 (i.e., the end plate) for fixation and limitation. After the second output electrode component 1123 is electrically connected to the battery cell 1121, the first output electrode component 1122 can be limited and fixed.

[0077] Combination Figure 2 As shown, the battery device 1100 may further include a housing 1110, which has a receiving space 1113 in which the battery cell 1121 is received; for example, the housing 1110 includes a cover portion 1111 and a frame portion 1112, which cover each other and together define the receiving space 1113 for receiving the battery device 1100 or the battery cell 1121. The frame portion 1112 can be a hollow structure with one open end, and the lid portion 1111 can be a plate-like structure. In this case, the lid portion 1111 can be understood as an end cap on the body 1110. The lid portion 1111 covers the open side of the frame portion 1112, so that the lid portion 1111 and the frame portion 1112 together define the accommodating space 1113. Alternatively, both the lid portion 1111 and the frame portion 1112 can be hollow structures with one open side, and the open side of the lid portion 1111 covers the open side of the frame portion 1112. Of course, the body 1110 formed by the lid portion 1111 and the frame portion 1112 can be of various shapes, such as a cylinder or a cuboid. In this application, a rectangular body 1110 is used as an example for explanation. Generally, in the battery device 1100, the end of each battery cell 1121 with the terminal post 11213 is positioned opposite to the lid portion 1111.

[0078] In this embodiment, the battery device 1100 is provided with an output electrode first component 1122. The output electrode first component 1122 is provided with a column portion 11222 connected to an external circuit and a base portion 11221 connected to a battery cell 1121. The battery cell 1121 can connect, fix and limit the output electrode first component 1122, so that the output electrode first component 1122 can be stably arranged in the battery device 1100 without the aid of a limiting member 1130 and bolt assembly, which helps to reduce the dependence of the output electrode 1136 (specifically the output electrode first component 1122) on the limiting member 1130, and can simplify the combination design between the output electrode 1136 and the limiting member 1130, thus simplifying the structure of the battery device 1100.

[0079] According to some embodiments of this application, refer to Figure 3-7 As shown, the output pole 1136 also includes a second output pole component 1123, which is connected to the terminal post 11213 and the base portion 11221 of the battery cell 1121 respectively, and the base portion 11221 is fixedly connected to the second output pole component 1123.

[0080] Specifically, the battery device 1100 includes at least two components, namely a first output electrode component 1122 and a second output electrode component 1123. The second output electrode component 1123 serves as a bridge for current transmission between the battery cell 1121 and the housing portion 11221. Therefore, the second output electrode component 1123 is connected to the terminal post 11213 of the battery cell 1121, for example, by welding. At the same time, the second output electrode component 1123 is also connected to the housing portion 11221. The second output electrode component 1123 can also limit the housing portion 11221. For example, the housing portion 11221 is welded to the second output electrode component 1123, or the housing portion 11221 and the second output electrode component 1123 can be detachably connected by fasteners.

[0081] The second output electrode component 1123 and the first output electrode component 1122 are positioned near the end of the battery cell 1121. The second output electrode component 1123 is welded and fixed to the terminal post 11213 of the end battery cell 1121. Furthermore, the second output electrode component 1123 overlaps with the base portion 11221 and is welded at the overlap position 11233. The post portion 11222 is welded to the base portion 11221.

[0082] The second output electrode component 1123 can be a busbar made of metal, such as a copper or aluminum plate, with a thickness of 2-5mm. The surface of the plate is tin-plated to enhance conductivity and corrosion resistance. The second output electrode component 1123 can have a sheet-like structure. One end of the second output electrode component 1123 can be connected to the terminal post 11213 of the battery cell 1121 via ultrasonic welding. The diameter of the welding area can be 6mm, and the welding strength should not be less than 50N. The other end of the second output electrode component 1123 overlaps with the base 11221, and the overlapping area is welded and fixed by laser welding, overlay welding, friction welding, etc. Alternatively, the other end of the second output electrode component 1123 can also be fixedly connected to the base 11221 of the first output electrode component 1122 by bolts. Spring washers are provided at the bolt connection to prevent loosening and ensure conductivity continuity during long-term use.

[0083] In this embodiment, the output pole 1136 of the battery device 1100 is composed of a first output pole component 1122 and a second output pole component 1123. The column portion 11222 in the first output pole component 1122 facilitates electrical connection with external electrical components. The second output pole component 1123 connects to the battery cell 1121 and also connects to and limits the base portion 11221 in the first output pole component 1122. This allows the first output pole component 1122 to be stably arranged in the battery device 1100 without the aid of the limiting member 1130 and bolt assembly, which helps to reduce the dependence of the output pole 1136 (specifically the first output pole component 1122) on the limiting member 1130 and simplifies the combination design between the output pole 1136 (i.e., the first output pole component 1122 and the second output pole component 1123) and the limiting member 1130.

[0084] According to some embodiments of this application, the seat portion 11221 is a layered sheet structure.

[0085] Specifically, the base portion 11221 can be formed by stacking multiple layers of metal sheets, which can be made of materials with good electrical conductivity such as copper, aluminum, or their alloys. The multiple layers of metal sheets can be formed into an integral sheet structure (or sheet-like structure) by pressing.

[0086] Compared to non-layered plate structures, the layered structure design of the base portion 11221 facilitates the processing of the base portion 11221, for example, it facilitates stamping, bending, etc.

[0087] Furthermore, the stacked sheet structure can increase the conductive cross-sectional area of ​​the base portion 11221, reduce resistance, and decrease energy loss during current transmission. The stacked structure can reduce connection impedance, improve efficiency, and reduce heat generation by shortening the current path or increasing the parallel conductive cross-section.

[0088] In addition, the stacked sheet structure also has the function of current equalization. The multi-layered parallel stacked structure can balance the current distribution on the base part 11221 and reduce the risk of local overload.

[0089] Furthermore, the layered sheet structure gives the base portion 11221 better structural strength and toughness, enabling it to withstand greater external forces and stress caused by temperature changes, which is beneficial to extending the service life of the first output electrode component 1122.

[0090] In this embodiment, the layered design facilitates subsequent bending and processing of the base portion 11221, and has a positive effect on reducing internal resistance and equalizing flow.

[0091] According to some embodiments of this application, refer to Figure 7 As shown, the base portion 11221 includes a first portion 11223, a bent portion 11225, and a second portion 11224. The bent portion 11225 is connected between the first portion 11223 and the second portion 11224. Along the height direction of the battery cell 1121, the first portion 11223 and the second portion 11224 are staggered. The column portion 11222 is connected to the first portion 11223, and the output electrode second component 1123 is connected to the second portion 11224.

[0092] Specifically, considering that the base portion 11221 needs to connect both the column portion 11222 and the output electrode second component 1123, in order to reduce the interference between the column portion 11222 and the output electrode second component 1123, and considering that the height increases after the base portion 11221 and the output electrode second component 1123 overlap, connecting the column portion 11222 at the same position would easily increase the space occupied in the height direction, resulting in an increase in the height of the battery device 1100, therefore, a first part 11223 and a second part 11224 are formed on the base portion 11221 in a staggered arrangement. The first part 11223 and the second part 11224 are connected by a bending part 11225, so that the first part 11223, the second part 11224 and the bending part 11225 can be integrally formed.

[0093] Understandably, referring to Figure 6 As shown, the misalignment direction of the first part 11223 and the second part 11224 should be in the height direction. The second part 11224 is connected to the output electrode second component 1123 (e.g., overlapped). Therefore, in the height direction of the battery cell 1121, the height of the position of the second part 11224 should be higher than the height of the position of the first part 11223. Visually, the base portion 11221 may have a "Z" shape.

[0094] The aforementioned misaligned (or bent) shape design of the base portion 11221 takes into account the fact that some battery cells 1121 have protrusions on their tops. Specifically, in conjunction with Figure 20 As shown, a convex structure 11212 is formed on the top end face of the battery cell 1121. This convex structure 11212 is usually located between the two terminals 11213. This type of battery cell 1121 is also called a convex battery cell 1121. In order to reduce the interference between the output electrode second component 1123 and the convex structure 11212, the height of the position corresponding to the output electrode second component 1123 and the convex structure 11212 is increased. As a result, the height of the position where the output electrode second component 1123 is connected to the base portion 11221 (specifically the second part 11224) is also increased accordingly. In order to reduce the space occupied by the output electrode first component 1122 in the height direction, the height of the first part 11223 connected to the pillar portion 11222 on the base portion 11221 is reduced accordingly. This results in a staggered arrangement between the first part 11223 and the second part 11224.

[0095] In this embodiment, the first part 11223 and the second part 11224 of the seat 11221 are staggered, which can make more reasonable use of the space in the height direction, reduce the generation of redundant space, and improve the space utilization rate.

[0096] According to some embodiments of this application, refer to Figure 6 and Figure 7 As shown, the second output component 1123 is attached to the second part 11224 and welded to the second part 11224.

[0097] Specifically, the overlapping of the second output electrode component 1123 and the second part 11224 increases the contact area between them, and the welding method further increases the connection strength between them. The welding area covers the overlapping surface, which not only preserves the conductive path of the surface contact between them, but also forms mechanical strength support through the solder joint, thereby improving the limiting and fixing effect of the second output electrode component 1123 on the base part 11221.

[0098] In addition, the overlapping surface formed between the second component 1123 and the second part 11224 of the output electrode provides a large area of ​​current conduction path. Combined with the multi-channel conductivity of the stacked second part 11224, the current distribution is more uniform, reducing the risk of local overheating and helping to reduce heat loss.

[0099] Furthermore, the overlapping and welding method between the second output electrode component 1123 and the second part 11224 can improve the connection strength between the two, enhance the ability of the battery device 1100 to resist external forces under vibration and impact conditions, and reduce the risk of loosening and separation between the two.

[0100] In this embodiment, the overlapping method not only realizes the electrical connection between the second output electrode component 1123 and the second part 11224, but also plays a more effective limiting role for the second part 11224, which can further limit the displacement of the seat part 11221 and ensure the stability of the connection between the first output electrode component 1122 and the second output electrode component 1123.

[0101] According to some embodiments of this application, refer to Figure 2-5 As shown, the housing 1110 includes a frame 1115 and a support plate 1114 connected to the frame 1115. The frame 1115 and the support plate 1114 together enclose a receiving space 1113. The output pole is located on the side of the battery cell away from the support plate 1114, and the column portion 11222 extends in a direction away from the support plate 1114.

[0102] For example, the box frame 1112 includes a frame 1115 and a support plate 1114. When the battery device 1100 is placed horizontally, the support plate 1114 can be understood as the bottom plate of the box 1110. The battery cell 1121 can be arranged opposite to the support plate 1114. The support plate 1114 can also support the battery cell 1121. The frame 1115 can be understood as the side plate of the box 1110. The side plate is ring-shaped and is connected to the support plate 1114 to form a hollow structure with an opening on one side.

[0103] For example, when the battery device 1100 is placed horizontally, the battery device 1100 has a top, a base portion 11221 and a column portion 11222 are arranged on the top of the battery device 1100, the output electrode is provided on the side of the battery cell 1121 away from the support plate 1114, and the column portion 11222 extends in a direction away from the support plate 1114. It can be understood that the column portion 11222 extends in a direction away from the top.

[0104] Typically, the battery device 1100 is cubic in shape. When the battery device 1100 is placed horizontally, it has sides (including ends) and a top. Similarly, the battery cell 1121 also has a top. Typically, the terminal post 11213 is located on the top of the battery cell 1121, and the top of the battery cell 1121 is part of the top of the battery device 1100. Similarly, the limiting member 1130 also has a top, and its top is also part of the top of the battery device 1100. In other words, the top of the battery device 1100 includes the top of the limiting member 1130 and the top of the battery cell 1121. In related technologies, the output electrode is arranged on the side of the battery device 1100, with a tab leading out laterally. However, in some battery devices 1100, the lateral space of the battery device 1100 is insufficient, and the side plates and auxiliary components that support and limit the plates may interfere with other components, making it difficult to set the output poles laterally.

[0105] Therefore, in this example, the first output electrode component 1122 is arranged on the side away from the support plate 1114 (i.e., the top of the battery device 1100), and both the base portion 11221 and the column portion 11222 are located on the side of the battery device 1100 away from the support plate 1114. The second output electrode component 1123 is connected to the terminal post 11213 of the battery cell 1121. It can be seen that the second output electrode component 1123 is also located on the side of the battery device 1100 (specifically the battery cell 1121) away from the support plate 1114. Therefore, it is more convenient to connect the second output electrode component 1123 to the base portion (specifically the second part 11224), and a convenient overlap can be achieved.

[0106] The upright portion 11222 is connected to the side of the base portion 11221 (specifically the first portion 11223) opposite to the battery cell 1121, and the upright portion 11222 extends a predetermined height in a direction away from the base portion 11221 and the battery cell 1121. For example, the extending direction of the upright portion 11222 is parallel to the height direction of the battery cell 1121. When the first portion 11223 in the base portion 11221 is flat, the upright portion 11222 can be perpendicular to the first portion 11223.

[0107] The column portion 11222 is positioned on the side of the battery device 1100 away from the support plate 1114 and extends outward, facilitating connection with external circuits, external electrical components, or equipment. This simplifies the connection structure between the battery device 1100 and the external environment, improving installation efficiency. Furthermore, this arrangement keeps the column portion 11222 away from the heat-generating area of ​​the battery cell 1121, reducing the impact of temperature on its conductivity.

[0108] Furthermore, by arranging the first part 11223 of the output electrode on the side of the battery device 1100 away from the support plate 1114, space on the side of the battery device 1100 can be saved, the risk of interference between the battery device 1100 and other components on the side can be reduced, and the utilization rate of lateral space can be improved.

[0109] In this embodiment, placing the base portion 11221 and the column portion 11222 on the side of the battery device 1100 away from the support plate 1114 can save space in the battery device 1100 and facilitate the connection of the column portion 11222 with electrical components located above the battery device 1100, thereby improving the ease of connection.

[0110] According to some embodiments of this application, refer to Figure 4 , Figure 5 and Figure 8-11 As shown, the battery device 1100 also includes a limiting bracket 1124, which has a limiting structure 11241. The limiting structure 11241 is connected to the output electrode second component 1123 and / or the base portion 11221.

[0111] Specifically, the limiting bracket 1124 is a frame structure or plate structure made of insulating material, such as plastic. The limiting bracket 1124 is disposed on the side of the battery cell 1121 away from the support plate 1114 (i.e., the top of the battery cell 1121). One function of the limiting bracket 1124 is to limit the position of the second output electrode component 1123 and / or the base portion 11221 by setting the limiting structure 11241, thereby connecting the limiting structure 11241 to the second output electrode component 1123 and / or the base portion 11221.

[0112] The limiting structure 11241 can adopt a protrusion structure, groove structure, or hole structure, etc., and the limiting method of the limiting structure 11241 can be a snap-fit, plug-in, or bolt connection. For example, the limiting bracket 1124 includes a limiting plate and a protrusion connected to the edge of the limiting plate. A slot is formed on the protrusion. The combination of the slot and the protrusion forms the limiting structure 11241. The slot can be plugged into the seat part 11221 or the output pole second component 1123 or the overlapping part of the seat part 11221 and the output pole second component 1123, thereby limiting the output pole second component 1123 and the seat part 11221.

[0113] The limiting structure 11241 can be an independent component, which can be fixed or detachably connected to the main body of the limiting bracket 1124; or the limiting structure 11241 can be integrally formed on the limiting bracket 1124.

[0114] The limiting bracket 1124 can be connected to the battery cell 1121, or the limiting bracket 1124 can be fixed by hot pressing the upper and lower PET films of the hot pressing CCS (CellsContact System). The hot pressing CCS is a battery connection system manufactured by hot pressing process.

[0115] The limiting bracket 1124 can extend below the busbar 1126 (see below) for connecting two adjacent battery cells 1121, so that the lower surface of the busbar 1126 fits against the upper surface of the limiting bracket 1124.

[0116] The connection between the limiting structure 11241 and the second output electrode component 1123 and / or the base portion 11221 includes: one case where the limiting structure 11241 is connected to the second output electrode component 1123; another case where the limiting structure 11241 is connected to the first output electrode component 1122; and yet another case where the limiting structure 11241 can be connected to both the first output electrode component 1122 and the second output electrode component 1123 simultaneously.

[0117] In this embodiment, by adding a limiting bracket 1124, the limiting structure 11241 can further position and limit the output electrode second component 1123 and the base part 11221, thereby improving the structural stability of the output electrode second component 1123 and the output electrode first component 1122; in addition, the limiting structure can also serve as insulation, reducing the risk of short circuit between the output electrode first component 1122 and the output electrode second component 1123 and other metal structures.

[0118] According to some embodiments of this application, refer to Figure 4 , Figure 5 , Figure 12 and Figure 13 As shown, the battery device 1100 also includes a circuit board 1125 and a current collector 1126, and multiple battery cells 1121 are electrically connected to each other through the current collector 1126; at least one of the output electrode second component 1123 and the limiting bracket 1124 is integrally formed with the circuit board 1125 and the current collector 1126 by hot pressing.

[0119] The battery device 1100 has a high-voltage section and a low-voltage section. The high-voltage section is used to transmit current, while the low-voltage section is used for control. The low-voltage section is also called the low-voltage control system. Circuit board 1125 in the battery device 1100 belongs to the low-voltage control section. Circuit board 1125 is the core carrier in the battery device 1100 for "signal processing, logic control, and status monitoring." Circuit board 1125 can be considered a low-voltage control component. Circuit board 1125 is used for low-voltage output of electrical signals. The output terminal is used for high-voltage output.

[0120] Specifically, the busbar component 1126 is used to realize the series or parallel connection between multiple battery cells 1121. The busbar component 1126 can be connected to the terminal post 11213 of the battery cell 1121 to realize the electrical connection between the battery cells 1121. A busbar component 1126 can be set between two adjacent battery cells 1121.

[0121] The circuit board 1125 is used to monitor and control the operating status of the battery cells 1121. The circuit board 1125 is electrically connected to each battery cell 1121 and is used to collect information such as voltage and temperature. Typically, the circuit board 1125 and the busbar component 1126 are located on top of the battery cells 1121.

[0122] By hot-pressing, at least one of the output electrode second component 1123 and the limiting bracket 1124 is integrally formed with the circuit board 1125 and the bus component 1126. For example, the output electrode second component 1123, the circuit board 1125, and the bus component 1126 are integrally formed; or the limiting bracket 1124, the circuit board 1125, and the bus component 1126 are integrally formed; or the output electrode second component 1123, the limiting bracket 1124, the circuit board 1125, and the bus component 1126 are integrally formed. This integral structure improves the integration between the components and facilitates subsequent overall installation.

[0123] Specifically, the battery device 1100 includes a hot-pressing film 1134. There are two hot-pressing films 1134, namely an upper hot-pressing film 11341 and a lower hot-pressing film 11342. The hot-pressing process is adopted. Taking the output electrode second component 1123, the limiting bracket 1124, the circuit board 1125 and the busbar component 1126 as an integrated structure by hot-pressing, the upper hot-pressing film 11341 and the lower hot-pressing film 11342 are respectively provided on the upper and lower parts of the circuit board 1125, the busbar component 1126, the output electrode second component 1123 and the limiting bracket 1124 to form an integrated structure.

[0124] In this embodiment, at least one of the output electrode second component 1123 and the limiting bracket 1124 is thermo-pressed into an integral structure with the circuit board 1125 and the bus component 1126. This reduces the number of connection points between the components, lowers contact resistance and the risk of failure, and improves the overall reliability of the battery device 1100. The thermo-pressing process ensures tight connections between the components and a compact structure, which helps save internal space in the battery device 1100 and improves the energy density of the battery device 1100.

[0125] According to some embodiments of this application, refer to Figure 3 , Figure 4 and Figure 14-16As shown, the battery device 1100 also includes an output electrode cover 1127, which includes a cover portion 11271 and a sleeve portion 11272 connected to the cover portion 11271. The cover portion 11271 covers at least the base portion 11221 and at least part of the output electrode second component 1123, and the sleeve portion 11272 is sleeved on the outside of the column portion 11222.

[0126] Specifically, the output electrode cover 1127 can be made entirely of insulating material. One of the functions of the output electrode cover 1127 is to insulate the first output electrode component 1122 and the second output electrode component 1123. For example, if the battery device 1100 has a cover portion 1111, then the output electrode cover 1127 is located between the cover portion 1111 and the first output electrode component 1122 and the second output electrode component 1123, thus providing insulation. The lower surface of the output electrode cover 1127 can be fitted against the upper surface of the second output electrode component 1123.

[0127] Since the first output electrode component 1122 includes a base portion 11221 and a column portion 11222, the structure of the output electrode cover 1127 includes a cover portion 11271 corresponding to the base portion 11221 and a sleeve portion 11272 corresponding to the column portion 11222. The cover portion 11271 can at least cover the base portion 11221 and the second output electrode component 1123, thus providing insulation. The sleeve portion 11272 is sleeved on the outside of the column portion 11222, and the inner diameter of the sleeve portion 11272 is adapted to the outer diameter of the column portion 11222, thereby providing insulation and protection for the column portion 11222.

[0128] The cover portion 11271 and the sleeve portion 11272 can be integrally formed, or the cover portion 11271 and the sleeve portion 11272 can be assembled and connected in a detachable manner.

[0129] In this embodiment, the output electrode cover 1127 serves as electrical insulation, reducing the risk of short circuits between the column portion 11222, the base portion 11221, and the second output electrode component 1123 and surrounding electrical components. Furthermore, the output electrode cover 1127 protects the base portion 11221 and the second output electrode component 1123, preventing dust, moisture, etc., from entering the connection area and affecting conductivity and connection reliability. Additionally, the sleeve portion 11272, fitted over the column portion 11222, provides support and protection for the column portion 11222, reducing the risk of damage to the column portion 11222 from external impacts and also reducing the risk of electric shock from accidental contact with the column portion 11222.

[0130] According to some embodiments of this application, refer to Figure 16As shown, the cover portion 11271 has an assembly hole 11275, the sleeve portion 11272 is disposed on the assembly hole 11275, and the output pole second component 1123 has an edge side 11232 near the assembly hole 11275. There is a gap L between the edge side 11232 and the hole wall 11274 of the assembly hole, and the value of the gap L is greater than 0 mm.

[0131] Specifically, the assembly hole 11275 is a through hole structure provided on the cover portion 11271 of the output electrode cover 1127 for assembling the sleeve portion 11272. A part of the output electrode second component 1123 extends to the bottom of the cover portion 11271 and is located near the assembly hole 11275. Therefore, the output electrode second component 1123 also forms an edge side 11232 near the edge of the assembly hole 11275 (or the hole wall 11274 of the assembly hole). This edge side 11232 is the area of ​​the output electrode second component 1123 closest to the assembly hole 11275.

[0132] Since a cover portion 1111 (the cover portion 1111 of the battery device 1100) will be installed on top of the battery device 1100, and the cover portion 1111 is located above the output electrode cover 1127, considering the insulation reliability between the second output electrode component 1123 and the cover portion 1111 and the risk of short circuit, sufficient creepage distance should be ensured between the second output electrode component 1123 and the cover portion 1111.

[0133] In this example, a gap L is provided between the edge side 11232 of the second output electrode component 1123 and the wall 11274 of the assembly hole. The value of the gap L is greater than 0 mm, and typically, the gap L can range from 1.5 mm to 5 mm. It can be seen that the edge side 11232 of the second output electrode component 1123 does not exceed the edge of the assembly hole 11275, increasing the creepage distance and effectively reducing the risk of insulation failure and short circuit between the second output electrode component 1123 and the cover portion 1111, thus ensuring the stable operation of the battery device 1100.

[0134] In this embodiment, by controlling the formation of a gap L between the edge side 11232 of the output electrode second component 1123 and the hole wall 11274 of the assembly hole, the risk of insulation failure and short circuit between the output electrode second component 1123 and the cover portion 1111 can be effectively reduced, thereby ensuring the stable operation of the battery device 1100 and the battery device 1100.

[0135] According to some embodiments of this application, refer to Figure 3-5 and Figure 15As shown, the battery device 1100 also includes a jumper assembly 1128 electrically connected to the circuit board 1125. A clearance hole 11273 is formed on the cover portion 11271 corresponding to the position of the jumper assembly 1128. The cover portion 11271 covers the jumper assembly 1128, and the jumper assembly 1128 is at least partially disposed in the clearance hole 11273.

[0136] Specifically, the jumper assembly 1128 is a conductive component in the battery device 1100 used to realize circuit connection. The jumper assembly 1128 is also a low-voltage control component in the low-voltage (control) section of the battery device 1100, and is part of the low-voltage control circuit of the battery device 1100.

[0137] The jumper assembly 1128 may be made of a combination of metallic materials (such as copper, aluminum, or their alloys) and insulating materials. The surface of the jumper assembly 1128 may be treated with tin plating, nickel plating, etc., to enhance conductivity and corrosion resistance. The shape of the jumper assembly 1128 is designed according to the internal circuit layout of the battery device 1100, and may be flat or have a bent structure to accommodate different connection requirements.

[0138] The jumper assembly 1128 in the battery device 1100 is used to connect with the circuit board 1125 to transmit electrical signals. For example, if the signal output terminal on the circuit board 1125 is located at the end, the end can be electrically connected to the jumper assembly 1128 through a line to transmit the signal to the jumper assembly 1128. The jumper assembly 1128 has a conductive part (or interface structure) for external circuitry, thereby achieving the purpose of integrated signal transmission.

[0139] Typically, the jumper assembly 1128, through its connection with the circuit board 1125, can be used to conduct monitoring signals such as voltage and temperature of the battery cell 1121, thereby achieving centralized signal transmission and assisting in the accurate monitoring of the working status of the battery device 1100.

[0140] The jumper assembly 1128 can be disposed on the top of the battery cell 1121. The cover portion 11271 of the output terminal cover 1127 can cover the jumper assembly 1128. Since the jumper assembly 1128 has conductive parts for connecting to external circuits, the cover portion 11271 needs to have clearance holes 11273 corresponding to the positions of the conductive parts on the jumper assembly 1128, so that the cover portion 11271 can cover the jumper assembly. The jumper assembly 1128 is positioned on the cover portion 11271, with at least a portion (specifically the conductive portion) of the jumper assembly 1128 disposed within the clearance hole 11273, so that the conductive portion (or working portion) of the jumper assembly 1128 can be exposed within the clearance hole 11273, thereby preventing the cover portion 11271 from interfering with the conductive portion of the jumper assembly 1128 and ensuring that the normal operation of the jumper assembly 1128 is not interfered with by the cover portion 11271.

[0141] As part of the circuit system of the battery device 1100, the jumper assembly 1128, together with the circuit board 1125, forms a complete conductive network, enabling the electrical energy of the battery cell 1121 to be transmitted along the designed path, while also meeting the transmission requirements of monitoring signals.

[0142] In this embodiment, the clearance hole 11273 ensures that the output cover 1127 covers the base portion 11221 and the second output component 1123 without interfering with the normal operation of the jumper assembly 1128, thus guaranteeing the circuit connection function of the jumper assembly 1128. The partial coverage of the jumper assembly 1128 by the cover portion 11271 also provides a certain degree of protection, reducing the impact of external factors on it.

[0143] According to some embodiments of this application, refer to Figure 4 and Figure 5 As shown, the jumper assembly 1128 is disposed on the limiting bracket 1124, and the cover portion 11271 covers the jumper assembly 1128 and the limiting bracket 1124.

[0144] Specifically, the jumper assembly 1128 can be configured on the limit bracket 1124 and can be fixed by means of bonding, snap-fitting, bolt connection, etc.

[0145] The cover portion 11271 of the output terminal cover 1127 needs to be installed on the limiting bracket 1124, and the jumper assembly 1128 is also disposed on the limiting bracket 1124. Therefore, the aforementioned clearance hole 11273 needs to be opened on the cover portion 11271 corresponding to the position of the jumper assembly 1128, so that the cover portion 11271 can be installed on the limiting bracket 1124 and the jumper assembly 1128, and at least part of the jumper assembly 1128 (specifically the conductive part) is disposed in the clearance hole 11273 of the cover portion 11271, so that the conductive part (or working part) on the jumper assembly 1128 can be exposed in the clearance hole 11273, thereby preventing the cover portion 11271 from interfering with the conductive part on the jumper assembly 1128, and ensuring that the normal operation of the jumper assembly 1128 is not interfered with by the cover portion 11271.

[0146] In this embodiment, the cover portion 11271 can cover the limiting bracket 1124 and the jumper assembly 1128, and can avoid the conductive part of the jumper assembly 1128 by opening the avoidance hole 11273. While protecting the limiting bracket 1124 and the jumper assembly 1128, it can also ensure the normal operation of the jumper assembly 1128.

[0147] According to some embodiments of this application, refer to Figure 17 As shown, the battery device 1100 also includes a cover film 1129, which covers the base portion 11221; or, the cover film 1129 covers the base portion 11221 and the output electrode second component 1123.

[0148] Specifically, the cover film 1129 is made of insulating and heat-resistant materials, such as PET (Polyethylene Terephthalate) film, polyimide film, etc. PET film is a film made from polyethylene terephthalate. The cover film 1129 can cover the base portion 11221, or the cover film 1129 can cover both the base portion 11221 and the output electrode second component 1123. The cover film 1129 can be applied to the corresponding components by means of adhesive or heat pressing to form a tight fit.

[0149] The cover 1129 serves as insulation and isolation, reducing the risk of short circuits between the base 11221 and the second output electrode component 1123 and other metal components. Simultaneously, the cover 1129 blocks dust and moisture, protecting the surfaces of the base 11221 and the second output electrode component 1123 from corrosion and extending their service life. The cover 1129 also reduces friction and wear between the base 11221 and the second output electrode component 1123 and other components.

[0150] When the battery device 1100 is provided with a cover film 1129, the battery device 1100 may not be provided with an output electrode cover 1127. That is to say, the cover film 1129 can replace the output electrode cover 1127 and play a role in insulation and protection for the base part 11221 and the second output electrode component 1123.

[0151] In this embodiment, compared to the output electrode cover 1127, the cover film 1129 has a simpler structure, is easier to manufacture and install, and helps to reduce the production cost of the battery device 1100.

[0152] According to some embodiments of this application, refer to Figure 3-5 As shown, multiple battery cells 1121 are stacked along the first direction X and form two ends; the housing 1110 also includes a limiting member 1130, which is disposed at one end along the first direction X; the seat portion 11221 is at least partially connected to the limiting member 1130.

[0153] Specifically, at least one limiting member 1130 may be provided, but typically two limiting members 1130 may be provided. Multiple battery cells 1121 are stacked and arranged in the first direction X. A limiting member 1130 is provided at each end of the battery assembly 1100, and the limiting member 1130 limits the battery cells 1121 at both ends. The limiting member 1130 may be made of metal or high-strength plastic. The limiting member 1130 can be understood as an end plate or an expansion beam, and the end plate or expansion beam limits the battery cells 1121 at both ends of the battery cell assembly 1120.

[0154] For one of the limiting members 1130, the seat portion 11221 is at least partially connected to the limiting member 1130. The limiting member 1130 can support and support the seat portion 11221 (i.e., the first output pole component 1122), and the limiting member 1130 can also limit and position the seat portion 11221.

[0155] The seat 11221 can be placed directly on the limiting member 1130, or the seat 11221 and the limiting member 1130 can be detachably connected by fasteners or the like.

[0156] In this embodiment, the base portion 11221 is connected to the limiting member 1130, which provides more stable support for the first output pole component 1122 and improves its vibration and impact resistance.

[0157] According to some embodiments of this application, refer to Figure 3-5 and Figure 18 As shown, a recessed portion 11301 is formed on the side of the limiting member 1130 facing the seat portion 11221, and the seat portion 11221 is at least partially disposed in the recessed portion 11301.

[0158] Specifically, the recessed portion 11301 can be understood as a groove structure formed on the limiting member 1130. For example, the side of the limiting member 1130 facing the seat portion 11221 can be understood as the top of the limiting member 1130. Then, the top of the limiting member 1130 has a recessed portion 11301, which is located in the middle region of the top of the limiting member 1130. When the seat portion 11221 is assembled with the limiting member 1130, the bottom of the seat portion 11221 can fit against the bottom of the groove structure, and at least a portion of the seat portion 11221 can be accommodated in the groove structure, that is, accommodated in the recessed portion 11301.

[0159] For example, the first part 11223 of the base portion 11221 is accommodated in the recess 11301, which allows the mounting position of the column portion 11222 to be lowered, which helps to save the space occupied by the first output electrode component 1122 in the height direction of the battery device 1100, thereby improving the space utilization rate of the battery device 1100 in the height direction.

[0160] The recessed portion 11301 provides precise positioning for the seat portion 11221, improving the accuracy of its installation position within the battery device 1100. Simultaneously, the recessed portion 11301 constrains the seat portion 11221, further limiting its displacement and enhancing the stability of the connection between the first output electrode component 1122 and other components.

[0161] In this embodiment, by providing a recessed portion 11301 at the top of the limiting member 1130, the seat portion 11221 can be at least partially disposed inside the recessed portion 11301, which helps to reduce the space occupied by the first output electrode component 1122 in the height direction of the battery device 1100 and improves space utilization.

[0162] According to some embodiments of this application, refer to Figure 4 , Figure 5 , Figure 18 and Figure 19 As shown, the battery device 1100 also includes an insulating sheet 1131, which is disposed at least between the base portion 11221 and the recessed portion 11301.

[0163] Specifically, the insulating sheet 1131 serves as an insulator between the seat portion 11221 and the recessed portion 11301. The insulating sheet 1131 can be made of insulating materials such as mica sheets or plastic sheets.

[0164] The insulating sheet 1131 can be laid on the bottom and sides of the recess 11301 to isolate the seat portion 11221 from the surface of the recess 11301. Of course, the insulating sheet 1131 can also extend to the outside of the recess 11301. For example, the insulating sheet 1131 can extend from the recess 11301 to the top surface of the limiting member 1130.

[0165] In this embodiment, the insulating sheet 1131 serves as an insulating barrier, preventing electrical conduction between the seat portion 11221 and the end plate component, thus reducing the probability of short-circuit faults. Furthermore, the insulating sheet 1131 also reduces friction and wear between the seat portion 11221 and the limiting member 1130.

[0166] According to some embodiments of this application, refer to Figure 2-4 As shown, the limiting member 1130 is a die-cast end plate, and the box body 1110 also includes a side plate 1133. The die-cast end plate and the side plate 1133 are connected to form an accommodating space 1113.

[0167] Specifically, the housing 1110 may further include side panels 1133, which are located on opposite sides of the battery assembly 1100. The limiting member 1130 is connected to the side panels 1133 to jointly enclose and form an accommodating space 1113 for accommodating the battery cells 1121. The limiting member 1130 and the side panels 1133 can be connected by bolts, clips, riveting, etc. The limiting member 1130 and the side panels 1133 together constrain the stacked battery cells 1121.

[0168] The limiting component 1130 can be a die-cast part, that is, the limiting component 1130 is a die-cast end plate. The die-cast end plate and the side plate 1133 are riveted together, which can improve the connection reliability.

[0169] In this embodiment, the limiting member 1130 is a die-cast end plate, and the die-cast end plate is connected with the side plate to form a box 1110, which improves the structural stability of the box 1110.

[0170] According to some embodiments of this application, refer to Figure 20-22 As shown, multiple battery cells 1121 are stacked along a first direction X. An explosion-proof valve 11211 is provided on the side of the battery cell 1121 located at the end facing the seat portion 11221. At least a portion of the seat portion 11221 is disposed opposite to the explosion-proof valve 11211. The battery device 1100 also includes an insulating cover 1132, at least a portion of which is disposed between the explosion-proof valve 11211 and at least a portion of the seat portion 11221.

[0171] Specifically, multiple battery cells 1121 are stacked along the first direction X. Therefore, in the battery device 1100, there is a battery cell 1121 located at the end of the battery device 1100, and the outer side of the battery cell 1121 located at the end is the limiting member 1130. The first output electrode component 1122 may be arranged on the upper part of the battery cell 1121 located at the end, or the first output electrode component 1122 may be arranged on the upper part of the battery cell 1121 located at the end and on the upper part of the limiting member 1130.

[0172] The explosion-proof valve 11211 is a safety protection device integrated on the battery cell 1121. The explosion-proof valve 11211 is used to release the pressure and gas generated inside the battery cell 1121 due to abnormal conditions (such as overcharging, short circuit, high temperature, puncture, etc.) to reduce the risk of thermal runaway of the battery cell 1121.

[0173] Typically, the side of the battery cell 1121 facing the base portion 11221 can be understood as the top of the battery cell 1121. That is, the explosion-proof valve 11211 is located on the top of the battery cell 1121. Therefore, the explosion-proof valve 11211 is provided on the top of the battery cell 1121 at the end. The first output pole component 1122 (specifically the second part 11224 of the base portion 11221) and the second output pole component 1123 are located in the upper space of the battery cell 1121 at this end. Therefore, the first output pole component 1122 and the second output pole component 1123 have the risk of short-circuiting with the explosion-proof valve 11211.

[0174] Considering the aforementioned risks, since the second portion 11224 of the seat 11221 is located above the explosion-proof valve 11211, the battery device 1100 is equipped with an insulating cover 1132. The insulating cover 1132 is made of insulating material and is positioned between the explosion-proof valve 11211 and the second portion 11224 to provide insulation. Of course, the coverage area of ​​the insulating cover 1132 can be further increased, and the insulating cover 1132 can extend to the surface of the battery cell 1121.

[0175] The insulating cover 1132 is installed between the explosion-proof valve 11211 and the second part 11224 of the seat 11221. The insulating cover 1132 can be fixed to the battery cell 1121 or the seat 11221 by means of snap-fit ​​or adhesive.

[0176] In addition, when the battery cell 1121 malfunctions and the explosion-proof valve 11211 opens to release gas or substances, the insulating cover 1132 can prevent it from directly contacting the second part 11224 of the base 11221, reducing the damage caused by the explosion-proof valve 11211 to the first component 1122 of the output electrode. In addition, it can also reduce the problem of short circuits caused by substances released by the explosion-proof valve 11211.

[0177] In this embodiment, the insulating cover 1132 can reduce the risk of short circuit between the first output electrode component 1122 and the explosion-proof valve 11211.

[0178] According to some embodiments of this application, refer to Figure 21 and Figure 22 As shown, the insulating cover 1132 includes a first sheet portion 11321 and a second sheet portion 11322 connected to the first sheet portion 11321. The first sheet portion 11321 and the second sheet portion 11322 are arranged at an angle. The first sheet portion 11321 is attached to the side wall of the battery cell 1121, and the second sheet portion 11322 is disposed between the explosion-proof valve 11211 and at least a portion of the seat portion 11221 (specifically the second portion 11224).

[0179] Specifically, the first piece 11321 and the second piece 11322 can be integrally formed sheet structures. The sheet structures are bent so that the first piece 11321 and the second piece 11322 are arranged at an angle, with the angle ranging from 80° to 100°, for example, 90°.

[0180] Both the first sheet portion 11321 and the second sheet portion 11322 are sheet-shaped. The first sheet portion 11321 is disposed in contact with the side wall of the end battery cell 1121. The first sheet portion 11321 can also be bonded to the battery cell 1121. The first sheet portion 11321 is located between the limiting member 1130 and the end battery cell 1121, so as to provide insulation between the battery cell 1121 and the limiting member 1130. The second sheet portion 11322 is arranged above the explosion-proof valve 11211 and between the explosion-proof valve 11211 and the second portion 11224, so as to provide insulation between the explosion-proof valve 11211 and the second portion 11224.

[0181] In this embodiment, the first piece 11321 is attached to the side wall, providing a stable support for the entire insulating cover 1132, so that the second piece 11322 can be reliably located between the explosion-proof valve 11211 and the second part 11224, and fully exert its protective function; the angled arrangement structure allows the insulating cover 1132 to be installed more stably on the battery cell 1121, further improving the protective effect of the insulating cover 1132.

[0182] According to some embodiments of this application, refer to Figure 23As shown, the battery device 1100 also includes a circuit board 1125 and an information acquisition component 1135. The battery cell 1121 has a monitoring window 11214, and the information acquisition component 1135 is disposed on the monitoring window 11214 and connected to the battery cell 1121. The circuit board 1125 includes a main body 11256 and a flange 11251, both equipped with circuit structures. The main body 11256 extends along a first direction X, and the main body 11256 is connected to the battery cell 1121 in a third direction Z. 21 are arranged oppositely. The main body 11256 is provided with a first side 11253 and a second side 11252 oppositely along the second direction Y. The monitoring window 11214 is arranged close to the first side 11253. The flange 11251 is connected to the second side 11252 of the main body 11256. The flange 11251 extends from the second side 11252 to the first side 11253 and is electrically connected to the information acquisition component 1135. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0183] To monitor the battery cell 1121, a monitoring window 11214 is typically provided on the top of the battery cell 1121. The monitoring window 11214 is a reserved local opening or special area on the battery cell 1121 for monitoring its temperature. Typically, the outer surface of the battery cell 1121 is covered with an insulating film, also known as a blue film. The battery cell 1121 has an outer shell, which can be an aluminum shell. The monitoring window 11214 is a through-hole structure formed in the blue film, exposing the aluminum shell of the battery cell 1121, allowing the flanged portion 11251 to align with it. An information acquisition component 1135, such as a temperature sensor, is connected to the flanged portion 11251, bringing it into contact with the aluminum shell corresponding to the monitoring window 11214 to collect the temperature of the battery cell 1121.

[0184] The information acquisition component 1135 is connected to the monitoring window 11214 and is used to acquire environmental information inside the battery cell 1121. For example, the information acquisition component 1135 can be a sensor, such as a temperature sensor, a current sensor, or a voltage sensor. The sensor is connected to the monitoring window 11214 to acquire the surface temperature or internal current or voltage data of the battery cell 1121.

[0185] The circuit board 1125 is able to acquire monitoring data through the information acquisition component 1135, so as to monitor and control the working status of the battery cell 1121. The circuit board 1125 is electrically connected to each battery cell 1121 and is used to collect data such as voltage, current and temperature.

[0186] The battery device 1100 has a high-voltage section and a low-voltage section. The high-voltage section is used to transmit current, and the low-voltage section is used for control. The low-voltage section is also called the low-voltage control system. The circuit board 1125 in the battery device 1100 belongs to the low-voltage control section. The circuit board 1125 is the core carrier in the battery device 1100 for "signal processing, logic control, and status monitoring." The circuit board 1125 can be considered a low-voltage control component. The circuit board 1125 is used for low-voltage output of electrical signals. The following output is a high-voltage output.

[0187] Specifically, circuit structures are typically formed on the surface of circuit board 1125. These circuit structures usually consist of conductors (copper foil), solder joints, components (resistors, capacitors, chips, etc.), and functional partitions. Their basic function is to establish a "pathway for electrical signals or energy." The circuit structure of circuit board 1125 needs to be designed according to the device's function. Different modules of the circuit structure undertake specific tasks. For example, the circuit structure can be divided into different areas according to function (such as power supply area, control area, input / output area, etc.), with different areas performing different functions.

[0188] In this application, the circuit board 1125 has a preset area, on which a preset circuit 11254 is formed. The preset circuit 11254 is used to connect to the information acquisition component 1135, and the information acquisition component 1135 is connected to the monitoring window 11214 of the battery cell 1121.

[0189] Typically, the circuit board 1125 is located on top of the battery cell 1121, and the circuit board 1125 is arranged opposite to the battery cell 1121. Specifically, the circuit board 1125 includes a main body 11256 and a flange 11251. The main body 11256 forms the main body of the circuit board 1125, and the flange 11251 is connected to the main body 11256. Circuit structures are evenly distributed on the main body 11256 and the flange 11251. The flange 11251 can be considered as a preset area on the circuit board 1125, and the circuit structure on the flange 11251 can be considered as the aforementioned preset circuit 11254. That is, the preset circuit 11254 is arranged on the flange 11251.

[0190] The main body 11256 extends along the first direction X and is arranged opposite to the battery cell 1121 in the third direction Z. The circuit structure is usually arranged on the side of the main body 11256 facing the battery cell 1121. The main body 11256 has a first side 11253 and a second side 11252 opposite to each other along the second direction Y. The monitoring window 11214 is located near the first side 11253, that is, the first side 11253 and the monitoring window 11214 are arranged opposite to each other. The flange 11251 is connected to the second side 11252 of the main body 11256. The flange 11251 extends from the second side 11252 to the first side 11253 and is electrically connected to the information acquisition component 1135. Understandably, the flange 11251 has two opposite ends, namely a first end and a second end. The first end is connected to the main body 11256, and the second end extends to the monitoring window 11214. The second end is connected to the information acquisition component 1135 at the position of the monitoring window 11214, and covers the monitoring window 11214 to connect with the battery cell 1121.

[0191] The manufacturing process of circuit board 1125 is explained below, referring to... Figure 24 As shown, when the circuit board 1125 is in a blank state, the main body 11256 and the flange 11251 together form a sheet shape. The flange 11251 is located entirely on the second side 11252 of the main body 11256. However, when assembling this sheet-shaped circuit board 1125 with the battery cell 1121, the monitoring window 11214 of the battery cell 1121 can only be located on one side of the first side 11253 of the main body 11256, making it impossible for the flange 11251 to be paired with the monitoring window 11214. Therefore, it is necessary to improve the structure of the circuit board 1125 by modifying the flange 11251, which is equipped with a preset circuit 11254. A cutting gap is formed between 51 and the main body 11256, so that the flange 11251 can move partially relative to the main body 11256. That is, the first end of the flange 11251 is connected to the main body 11256, and the flange 11251 is rotated around the first end, so that the second end of the flange 11251 can extend to the first side 11253 of the main body 11256, and then the second end of the flange 11251 can be paired with the monitoring window 11214. The flange 11251 extends across the first side 11253 and the second side 11252 of the main body 11256.

[0192] In this embodiment, a circuit structure that can be electrically connected to the information acquisition component 1135 is arranged on the flange portion 11251 of the circuit board 1125. The flange portion 11251 extends from the second side 11252 of the main body portion 11256 to the first side 11253. The extended end of the flange portion 11251 is then paired with the monitoring window 11214. The flange portion 11251 can be adapted and connected to the monitoring window 11214 located on the first side 11253 of the main body portion 11256, thereby realizing the displacement of the preset circuit 11254 (i.e., the circuit connection area). This eliminates the need to replace the entire circuit board 1125, reducing modification and production costs and shortening the technology iteration cycle.

[0193] According to some embodiments of this application, refer to Figure 6 As shown, the battery device 1100 also includes a circuit board 1125 electrically connected to each battery cell 1121. The circuit board 1125 is disposed on the side of the battery cell 1121 near the base portion 11221. The output electrode second component 1123 has a recessed portion 11231. The circuit board 1125 is connected to the output electrode second component 1123 and is confined in the recessed portion 11231.

[0194] The design of circuit board 1125 and the connection between circuit board 1125 and battery cell 1121 will not be described in detail here, but can be found in the above embodiments.

[0195] For the second output electrode component 1123, the second output electrode component 1123 can be a plate-like structure, with a recessed portion 11231 provided on it. In one case, the recessed portion 11231 can be understood as a groove structure on the plate, with the area where the recessed portion 11231 is located recessed into the plate compared to the surrounding area. In another case, the recessed portion 11231 can also be understood as a recessed area formed by stamping on the plate, with the recessed portion 11231 bent and connected to the surrounding plate; in yet another case, the recessed portion 11231 is a thinned area on the plate surface of the second output electrode component 1123.

[0196] The circuit board 1125 extends in the first direction X, and thus has a region corresponding to the second output component 1123. The circuit board 1125 overlaps this region of the second output component 1123. Considering the height of the circuit board 1125, to avoid affecting the height of the circuit board 1125 when it crosses the second output component 1123, a recessed portion 11231 is provided in the region of the second output component 1123 corresponding to the circuit board 1125, so that the circuit board 1125 can be located in the recessed portion 11231. In addition, the width of the recessed portion 11231 matches the width of the circuit board 1125, so that the recessed portion 11231 serves to limit the movement of the circuit board 1125.

[0197] In this embodiment, by providing a recessed portion 11231 on the second output component 1123, the circuit board 1125 can be accommodated and limited, which is beneficial to matching the height of the circuit board 1125 and improving the stability of the circuit board 1125.

[0198] According to some embodiments of this application, refer to Figure 5 , Figure 10 , Figure 11 As shown, the limiting bracket 1124 includes a limiting plate portion 11242 and a limiting structure 11241 connected to the edge of the limiting plate portion 11242. The limiting plate portion 11242 covers part of the battery cell 1121, and a rib structure 11243 is arranged on the side of the limiting plate portion 11242 facing the battery cell 1121.

[0199] For the limiting bracket 1124, one of its functions is to limit the output electrode second component 1123 and the output electrode first component 1122 through the limiting structure 11241. Therefore, the limiting structure 11241 needs to be provided on the limiting bracket 1124. Another function of the limiting bracket 1124 is to cover the battery cell 1121 and also to provide a certain degree of insulation for the battery cell 1121. Therefore, the limiting bracket 1124 needs to be provided with a limiting plate portion 11242, which can be understood as a plate structure.

[0200] The limiting structure 11241 and the limiting plate 11242 can be manufactured by integral molding or welding, or the limiting structure 11241 can be detachably connected to the limiting plate 11242.

[0201] Considering the thickness and large area of ​​the limiting plate portion 11242, which makes it prone to deformation, a rib structure 11243 is provided on the limiting plate portion 11242. The rib structure 11243 can be formed by stamping, thereby enhancing the deformation resistance of the limiting plate portion 11242. The rib structure 11243 can take the form of raised stripes or a grid pattern.

[0202] To ensure proper contact between the upper surface of the limiting bracket 1124 (specifically, the limiting plate portion 11242) and the lower surface of the output electrode cover 1127, a rib structure 11243 is arranged on the side of the limiting plate portion 11242 facing the battery cell 1121. Furthermore, the rib structure 11243 can distribute the pressure of the limiting plate portion 11242 on the top of the battery cell 1121, reducing the risk of excessive local pressure damaging the battery cell 1121.

[0203] In this embodiment, by arranging a rib structure 11243 on the side plate of the limiting plate 11242 facing the battery cell 1121, it is beneficial to improve the deformation resistance of the limiting bracket 1124, so that the limiting bracket 1124 has a better supporting and limiting function.

[0204] In one specific embodiment, refer to Figure 2-24As shown, the battery device 1100 includes a housing 1110, an output electrode, and multiple battery cells 1121. The housing 1110 has an accommodating space 1113. The multiple battery cells 1121 are stacked to form a battery cell group 1120. The output electrode includes a first output electrode component 1122, which includes a base portion 11221 and a post portion 11222. The post portion 11222 is connected to the base portion 11221 and protrudes from the surface of the base portion 11221. The base portion 11221 is electrically connected to the battery cell 1121. The output electrode also includes a second output electrode component 1123, which is connected to the terminal post 11213 of the battery cell 1121 and the base portion 11221, respectively. The base portion 11221 is fixedly connected to the second output electrode component 1123; the base portion 11221 is a layered sheet structure; the base portion 11221 includes a first part 11223, a bent part 11225, and a second part 11224, the bent part 11225 is connected between the first part 11223 and the second part 11224, and the first part 11223 and the second part 11224 are staggered; the column portion 11222 is connected to the first part 11223, and the second output electrode component 1123 is connected to the second part 11224; the second output electrode component 1123 overlaps the second part 11224 and is welded to the second part 11224; the housing 1110 includes a frame 1115 and a component connected to the frame 11223. The support plate 1114 of the frame 1115 and the support plate 1114 together form an accommodating space 1113; the output electrode is disposed on the side of the battery cell 1121 away from the support plate, and the column portion 11222 extends in the direction away from the support plate; the battery device 1100 also includes a limiting bracket 1124, the limiting bracket 1124 has a limiting structure 11241, the limiting structure 11241 is connected to the second component of the output electrode 1123 and / or the seat portion 11221; the battery device 1100 also includes an output electrode cover 1127, the output electrode cover 1127 includes a cover portion 11271 and a sleeve portion 11272 connected to the cover portion 11271, the cover portion 11271 covers at least the seat portion 11221 and to the side of the battery cell 11221. A small portion of the output terminal second component 1123, with a sleeve portion 11272 sleeved on the outside of the column portion 11222; the battery device 1100 also includes a jumper plate assembly 1128 electrically connected to the circuit board 1125, with a clearance hole 11273 formed on the cover portion 11271 corresponding to the position of the jumper plate assembly 1128, the cover portion 11271 covering the jumper plate assembly 1128, and the jumper plate assembly 1128 being at least partially disposed within the clearance hole 11273; a plurality of battery cells 1121 are stacked along the first direction X and form two ends; the housing 1110 includes at least a limiting member 1130, which is disposed at one end along the first direction X; the base portion 11221 is at least partially connected to the limiting member 1130;The limiting member 1130 has a recess 11301 formed on the side facing the seat portion 11221, and the seat portion 11221 is at least partially disposed in the recess 11301; the battery device 1100 also includes an insulating sheet 1131, which is at least disposed between the seat portion 11221 and the recess 11301; a plurality of battery cells 1121 are stacked along a first direction X, and an explosion-proof valve 11211 is provided on the side of the battery cell 1121 located at the end facing the seat portion 11221; at least a portion of the seat portion 11221 is arranged opposite to the explosion-proof valve 11211; the battery device 1100 also includes an insulating cover 1132, at least a portion of which is disposed between the explosion-proof valve 11211 and at least a portion of the seat portion 11221; the battery device 1100 also includes a circuit board 1125 and an information acquisition component 1135, and the battery cells 112 The circuit board 1125 has a monitoring window 11214, and an information acquisition component 1135 is disposed on the monitoring window 11214 and connected to the battery cell 1121. The circuit board 1125 includes a main body 11256 and a flange 11251, both of which are provided with circuit structures. The main body 11256 extends along a first direction X and is arranged opposite to the battery cell 1121 in a third direction Z. The main body 11256 has a first side 11253 and a second side 11252 respectively along a second direction Y. The monitoring window 11214 is positioned close to the first side 11253. The flange 11251 is connected to the second side 11252 of the main body 11256 and extends from the second side 11252 to the first side 11253 and is electrically connected to the information acquisition component 1135. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0205] According to some embodiments of this application, refer to Figure 1 As shown, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0206] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0207] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0208] According to some embodiments of this application, this application also provides an energy storage device, which includes a power conversion device and the battery device 1100 in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0209] Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0210] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0211] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0212] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0213] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0214] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells.

[0215] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0216] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0217] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system. As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0218] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0219] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0220] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0221] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery device 1100 within the energy storage device via cables. The battery device 1100 can supply its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000), thereby enabling them to replenish power.

[0222] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0223] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100), characterized in that, include: The enclosure (1110) has a storage space (1113); Multiple battery cells (1121) are stacked and arranged to form a battery cell group (1120). An output electrode includes an output electrode first component (1122), the output electrode first component (1122) including a base portion (11221) and a post portion (11222), the post portion (11222) being connected to the base portion (11221) and protruding from the surface of the base portion (11221); the base portion (11221) is electrically connected to the battery cell (1121), the base portion (11221) including a first part (11223), a bent part (11225) and a second part (11224), the bent part (11225) being connected between the first part (11223) and the second part (11224); along the height direction of the battery cell (1121), the first... The first part (11223) and the second part (11224) are staggered; the column part (11222) is connected to the first part (11223), and the second output electrode component (1123) is connected to the second part (11224); the output electrode also includes a second output electrode component (1123), which is connected to the terminal post (11213) of the battery cell (1121) and the base part (11221) respectively. The base part (11221) is fixedly connected to the second output electrode component (1123), and the second output electrode component (1123) overlaps the second part (11224) and is welded to the second part (11224).

2. The battery device (1100) as claimed in claim 1, characterized in that, The seat portion (11221) is a layered sheet structure.

3. The battery device (1100) as claimed in claim 1, characterized in that, The housing (1110) includes a frame (1115) and a support plate (1114) connected to the frame (1115). The frame (1115) and the support plate (1114) together enclose the accommodating space (1113). The output electrode is disposed on the side of the battery cell (1121) away from the support plate (1114). The column portion (11222) extends in a direction away from the support plate (1114).

4. The battery device (1100) as claimed in claim 1, characterized in that, The battery device (1100) further includes a limiting bracket (1124), which has a limiting structure (11241) connected to the second output electrode component (1123) and / or the seat portion (11221).

5. The battery device (1100) as claimed in claim 4, characterized in that, The battery device (1100) further includes a circuit board (1125) and a busbar component (1126), and the multiple battery cells (1121) are electrically connected to each other through the busbar component (1126); at least one of the second output electrode component (1123) and the limiting bracket (1124) is hot-pressed into an integral structure with the circuit board (1125) and the busbar component (1126).

6. The battery device (1100) as claimed in claim 4 or 5, characterized in that, The limiting bracket (1124) includes a limiting plate (11242) and a limiting structure (11241) connected to the edge of the limiting plate (11242). The limiting plate (11242) covers part of the battery cell (1121), and a rib structure (11243) is arranged on the side of the limiting plate (11242) facing the battery cell (1121).

7. The battery device (1100) as claimed in claim 5, characterized in that, The battery device (1100) further includes an output electrode cover (1127), the output electrode cover (1127) includes a cover portion (11271) and a sleeve portion (11272) connected to the cover portion (11271), the cover portion (11271) covers at least the base portion (11221) and at least a portion of the second output electrode component (1123), and the sleeve portion (11272) is sleeved on the outside of the column portion (11222).

8. The battery device (1100) as claimed in claim 7, characterized in that, The cover portion (11271) has an assembly hole (11275), the sleeve portion (11272) is disposed on the assembly hole (11275), and the output pole second component (1123) has an edge side (11232) near the assembly hole (11275), and there is a gap (L) between the edge side (11232) and the hole wall (11274) of the assembly hole.

9. The battery device (1100) as claimed in claim 7, characterized in that, The battery device (1100) further includes a jumper assembly (1128) electrically connected to the circuit board (1125). A clearance hole (11273) is formed on the cover portion (11271) corresponding to the position of the jumper assembly (1128). The cover portion (11271) covers the jumper assembly (1128), and the jumper assembly (1128) is at least partially disposed within the clearance hole (11273).

10. The battery device (1100) as claimed in claim 9, characterized in that, The jumper assembly (1128) is disposed on the limiting bracket (1124), and the cover (11271) covers the jumper assembly (1128) and the limiting bracket (1124).

11. The battery device (1100) as claimed in claim 1, characterized in that, The battery device (1100) also includes a cover film (1129) which covers the seat portion (11221).

12. The battery device (1100) as claimed in claim 1, characterized in that, Multiple battery cells (1121) are stacked along a first direction (X) and form two ends; the housing (1110) includes at least a limiting member (1130), which is disposed at one of the ends along the first direction (X); the seat portion (11221) is at least partially connected to the limiting member (1130).

13. The battery device (1100) as claimed in claim 12, characterized in that, The limiting member (1130) has a recess (11301) on the side facing the seat portion (11221), and the seat portion (11221) is at least partially disposed in the recess (11301).

14. The battery device (1100) as claimed in claim 13, characterized in that, The battery device (1100) further includes an insulating sheet (1131) which is disposed at least between the seat portion (11221) and the recess (11301).

15. The battery device (1100) as claimed in claim 12, characterized in that, The limiting member (1130) is a die-cast end plate, and the box body (1110) also includes a side plate (1133). The die-cast end plate and the side plate (1133) are connected to form the accommodating space (1113).

16. The battery device (1100) as claimed in claim 1, characterized in that, Multiple battery cells (1121) are stacked along a first direction (X), and an explosion-proof valve (11211) is provided on the side of the battery cell (1121) located at the end facing the seat portion (11221); at least a portion of the seat portion (11221) is arranged opposite to the explosion-proof valve (11211); the battery device (1100) also includes an insulating cover (1132), at least a portion of the insulating cover (1132) is disposed between the explosion-proof valve (11211) and the at least portion of the seat portion (11221).

17. The battery device (1100) as claimed in claim 16, characterized in that, The insulating cover (1132) includes a first sheet portion (11321) and a second sheet portion (11322) connected to the first sheet portion (11321). The first sheet portion (11321) and the second sheet portion (11322) are arranged at an angle. The first sheet portion (11321) is attached to the side wall of the battery cell (1121), and the second sheet portion (11322) is disposed between the explosion-proof valve (11211) and at least a portion of the seat portion (11221).

18. The battery device (1100) as claimed in claim 1, characterized in that, The battery device (1100) further includes a circuit board (1125) and an information acquisition component (1135). Each battery cell (1121) has a monitoring window (11214). The information acquisition component (1135) is disposed on the monitoring window (11214) and connected to the battery cell (1121). The circuit board (1125) includes a main body (11256) and a flanged portion (11251), both equipped with circuit structures. The main body (11256) extends along a first direction (X) and is arranged opposite to the battery cell (1121) in a third direction (Z). The main body (11256) is provided with a first side (11253) and a second side (11252) opposite each other along the second direction (Y). The monitoring window (11214) is configured close to the first side (11253). The flange (11251) is connected to the second side (11252) of the main body (11256). The flange (11251) extends from the second side (11252) to the first side (11253) and is electrically connected to the information acquisition component (1135). The first direction (X), the third direction (Z) and the second direction (Y) are perpendicular to each other.

19. The battery device (1100) as claimed in claim 1, characterized in that, The battery device (1100) further includes a circuit board (1125) electrically connected to each of the battery cells (1121), the circuit board (1125) being disposed on the side of the battery cell (1121) near the base portion (11221); the output pole second component (1123) has a recessed portion (11231), and the circuit board (1125) is connected to the output pole second component (1123) and confined within the recessed portion (11231).

20. An electrical appliance, characterized in that, The electrical device includes a battery device (1100) as described in any one of claims 1-19, the battery device (1100) being used to store or provide electrical energy.

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