Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises a plurality of battery monomers and a connecting assembly, the connecting assembly comprises a confluence component and a sampling component; the confluence component is electrically connected with the electric connection parts of the plurality of battery monomers, and comprises a sheet-shaped body; wherein an inserting groove is formed in the side face of the sheet-shaped body, and the side face of the inserting groove comprises two first side faces which are oppositely arranged in the thickness direction of the sheet-shaped body; the first end of the sampling part is inserted into the insertion groove and is in contact with the two first side surfaces respectively, so that the sampling part is electrically connected with the confluence part, and the connection mode is simple and rapid; compared with welding, the requirement for equipment for connecting the confluence component and the sampling component is low.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical equipment. Background Art

[0002] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices can be power batteries, or they can be energy storage batteries. In battery devices, the bar plate connects the electrode terminal and the nickel plate of the battery cell, and the nickel plate connects the bar plate and the signal acquisition circuit. The signal acquisition circuit collects data information such as the voltage of the battery cell through the bar plate and the nickel plate, thereby realizing the monitoring of the use status of the battery cell.

[0003] Among them, the nickel sheet and the bar sheet are usually electrically connected by welding. However, in the related art, the welding process for electrically connecting the bar sheet and the nickel sheet requires the use of designated equipment for welding, and it is difficult to monitor the cold welding and welding quality, and the welding time is long. Utility Model Content

[0004] The main technical problem solved by the present application is to provide a battery device and an electrical device to provide a new connection method between a bar and an FPC.

[0005] In order to solve the above technical problems, the first technical solution adopted in the present application is: to provide a battery device, including multiple battery cells and a connecting assembly; the connecting assembly includes a busbar component and a sampling component; the busbar component is electrically connected to the electrical connecting parts of the multiple battery cells, and the busbar component includes a sheet-like body; wherein the side of the sheet-like body has a plug-in groove, and the side of the plug-in groove includes two first side surfaces arranged opposite to each other along the thickness direction of the sheet-like body; the first end of the sampling component is inserted into the plug-in groove and contacts the two first side surfaces respectively.

[0006] By inserting the first end of the sampling component into the plug-in slot and respectively contacting the two first side surfaces of the plug-in slot, the electrical connection between the sampling component and the confluence component is achieved. The connection method is simple and quick; compared with welding, the equipment requirements for connecting the confluence component and the sampling component are lower.

[0007] In one embodiment, the first end of the sampling component has a first limiting structure, the side of the plug-in slot has a second limiting structure, and the first limiting structure is engaged with the second limiting structure.

[0008] The first limiting structure and the second limiting structure can be connected by locking, biting or embedding each other, thereby keeping the position between the sampling component and the convergence component relatively fixed, reducing the risk of abnormal contact resistance between the sampling component and the convergence component, and is conducive to maintaining the stability of the electrical connection between the sampling component and the convergence component.

[0009] In one embodiment, the sampling component is a conductive sheet, and two opposite side surfaces of the first end of the sampling component are provided with a first limiting structure; the side surface of the plug-in slot also includes two oppositely arranged second side surfaces, each second side surface is connected to the two first side surfaces; and the two second side surfaces have a second limiting structure.

[0010] By providing a first limiting structure on two opposite side surfaces of the first end of the sampling component and a second limiting structure on two second side surfaces of the plug-in slot, the snap connection between the sampling component and the plug-in slot is constrained from two opposite directions, which can more effectively resist external forces from different directions, making the connection between the sampling component and the plug-in slot more stable.

[0011] In one embodiment, the side surface of the sheet-like body has a plurality of inserting grooves, and sampling components are inserted into some of the inserting grooves.

[0012] By arranging a plurality of plug-in slots on the side of the sheet body, sampling components are inserted into some of the plug-in slots, and some of the plug-in slots are in an empty state and can be used as spare plug-in slots. In this way, when the connection between the sampling component and the plug-in slot is unstable, another new sampling component can be inserted into the spare plug-in slot. The replacement method is simple, and there is no need to replace the convergence component, which is conducive to saving costs.

[0013] In one embodiment, a plurality of inserting grooves are stacked along the thickness direction of the sheet-like body.

[0014] Through the above arrangement, the arrangement structure of the multiple plug-in slots corresponding to each battery cell is relatively compact. When the multiple battery cells are closely arranged, each battery cell can also be provided with multiple plug-in slots.

[0015] In one embodiment, the battery device also includes a signal acquisition circuit arranged on one side of the sampling component; the signal acquisition circuit is electrically connected to the sampling component; the surface of the signal acquisition circuit away from the battery cell is lower than the surface of the sampling component away from the battery cell; the sampling component is inserted into the plug-in slot farthest from the battery cell among the multiple plug-in slots.

[0016] Through the above arrangement, the signal acquisition circuit is electrically connected to the battery cell through the sampling component and the converging component, so that the signal acquisition circuit can collect data of the battery cell, thereby monitoring the use status of the battery cell.

[0017] In one embodiment, the side surface of the plug slot and the outer surface of the first end of the sampling component are both provided with an ohmic contact layer; the resistivity of the converging component and the resistivity of the sampling component are both greater than the resistivity of the ohmic contact layer.

[0018] By providing an ohmic contact layer on the side of the plug-in slot and the outer surface of the first end of the sampling component, the resistivity of the busbar component and the resistivity of the sampling component are both greater than the resistivity of the ohmic contact layer, and the current can easily flow between the plug-in slot of the busbar component and the first end of the sampling component, with almost no potential barrier or only a very small potential barrier to hinder the transmission of the current.

[0019] In one embodiment, the sheet-like body is an integrally formed structure.

[0020] By setting the sheet body as an integrally formed structure, the plug-in slot on the side of the sheet body is also an integral structure, and is not a plug-in slot formed by splicing multiple structural parts. This reduces the assembly process steps, maintains the long-term structural stability of the plug-in slot, and is conducive to maintaining the stability of the connection between the plug-in slot and the sampling component.

[0021] In one embodiment, the sampling component is a conductive sheet; along the thickness direction of the sheet-like body, the first end of the sampling component is interference-fitted with the insertion slot.

[0022] The interference fit between the first end of the sampling component and the plug-in slot is arranged to improve the connection stability between the sampling component and the converging component, thereby maintaining the stability of the signal acquisition circuit in acquiring battery cell data.

[0023] The second technical solution provided by the present application is to provide an electric device, comprising an equipment body and a battery device as described above, wherein the battery device is arranged in the equipment body. The electric device has at least the same advantages as the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of an electrical device provided in an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the structure of a battery cell provided in an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the assembly structure of the converging component, the sampling component and the signal acquisition circuit provided in the embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the structure of the confluence component of an embodiment of the present application;

[0030] Figure 6 It is an enlarged structural schematic diagram of the connection part of the confluence component and the sampling component provided in the embodiment of the present application;

[0031] Figure 7 It is a schematic diagram of the state structure of the sampling component provided in the embodiment of the present application being inserted into the confluence component.

[0032] In the figure: 1. battery device; 11. battery case; 111. upper case; 112. lower case; 12. battery cell; 121. connecting member; 122. cover plate; 123. electrical connection part; 124. safety valve; 125. electrode assembly; 126. shell; 13. connecting assembly; 131. conduit component; 1310. sheet body; 1311. plug-in slot; 1311a. first side; 1311b. second limiting structure; 1311c. second side; 132. sampling component; 132a. body; 132b. protrusion; 1321. first limiting structure; 14. signal acquisition circuit; 2. equipment body. DETAILED DESCRIPTION

[0033] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0034] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by technicians in this field without making creative work are within the scope of protection of this application.

[0036] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices can be power batteries, which are power sources for tools. Power batteries mostly refer to batteries that provide power for electric vehicles, electric trains, electric bicycles, golf carts and other transportation vehicles, as well as aerospace. Of course, battery devices can also be energy storage batteries, which refer to batteries used to store energy from renewable energy sources such as hydropower, thermal power, wind power and solar power stations. With the continuous expansion of the application fields of battery devices, the market demand is also constantly expanding.

[0039] The battery device may include a signal acquisition circuit (e.g., FPC), a bar sheet, a nickel sheet, and a plurality of battery cells. The bar sheet connects the electrode terminal and the nickel sheet of the battery cell, and the nickel sheet connects the bar sheet and the signal acquisition circuit. The signal acquisition circuit uses the bar sheet and the nickel sheet to monitor various parameters of the battery cell (including but not limited to voltage, current, resistance, and temperature, etc.) so as to monitor the health status and performance of the battery device in real time and collect data information such as voltage, thereby realizing the monitoring of the use status of the battery device.

[0040] Among them, the nickel sheet and the bar sheet are usually electrically connected by welding. However, in the related art, the welding process for electrically connecting the bar sheet and the nickel sheet requires the use of designated equipment for welding, and it is difficult to monitor the cold welding and welding quality, and the welding time is long.

[0041] In order to solve the above technical problems, an embodiment of the present application provides a battery device, which includes a plurality of battery cells and a connection assembly; the connection assembly includes a busbar component (e.g., a bar sheet) and a sampling component (e.g., a nickel sheet); the busbar component is electrically connected to the electrical connection parts of the plurality of battery cells (e.g., the electrode terminals of the battery cells); the busbar component includes a sheet-like body; the side of the sheet-like body has a plug-in slot, the side of the plug-in slot includes two first side surfaces that are arranged oppositely along the thickness direction of the sheet-like body, and the first end of the sampling component is inserted into the plug-in slot and contacts the two first side surfaces respectively. In this embodiment, the connection between the busbar component and the sampling component is achieved by inserting the sampling component into the plug-in slot of the busbar component, and the connection method is simple and fast, and at the same time, the requirements for the equipment that connects the busbar component and the sampling component are relatively low.

[0042] The embodiment of the present application provides an electrical device, see Figure 1 , Figure 1 It is a schematic diagram of the structure of the electrical equipment provided in the embodiment of the present application.

[0043] The electric device may include a device body 2 and a battery device 1, wherein the battery device 1 is disposed in the device body 2. The battery device 1 is used to supply power to the electric components of the device body 2 so that the device body 2 can work.

[0044] An electrical device may be an element that can consume electricity; for example, an electrical device may be a controller and an electronic component, etc. The controller may be a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0045] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. For the convenience of explanation, the following embodiments are described by taking the electric equipment as a vehicle as an example.

[0046] In some examples, the electric device may be a vehicle, the device body 2 may be a vehicle frame, and the battery device 1 is mounted on the vehicle frame. The electric device may be a vehicle lamp (such as a headlight, a rear lamp, etc.), a display screen, a dashboard, a control system (such as a controller), etc. The electric device is mounted on the vehicle body.

[0047] The embodiment of the present application also provides a battery device, see Figure 2~Figure 7 , Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of the present application, Figure 3 is a schematic diagram of the structure of a battery cell provided in an embodiment of the present application, Figure 4 is a schematic diagram of the assembly structure of the converging component, the sampling component and the signal acquisition circuit provided in the embodiment of the present application, Figure 5 is a schematic diagram of the structure of the confluence component of the embodiment of the present application, Figure 6 is an enlarged structural diagram of the connection part of the confluence component and the sampling component provided in the embodiment of the present application, Figure 7 It is a schematic diagram of the state structure of the sampling component provided in the embodiment of the present application being inserted into the confluence component.

[0048] See also Figure 2 The battery device 1 includes a battery case 11 and a plurality of battery cells 12; the battery case 11 has a chamber, and the plurality of battery cells 12 are accommodated in the chamber; the battery case 11 can protect the battery cells 12 and also facilitate the collection of the plurality of battery cells 12. In some examples, the battery case 11 can include an upper case 111 and a lower case 112, and the upper case 111 covers the lower case 112.

[0049] The shape of the battery case 11 can be specifically set as needed; for example, the shape of the battery case 11 can be cylindrical, and the corresponding battery device 1 can be called a round battery; for another example, the shape of the battery case 11 can be rectangular, and the corresponding battery device 1 can be called a rectangular battery.

[0050] See also Figure 3 The battery cell 12 may be a secondary battery, which refers to a battery cell 12 that can be continuously used by activating active materials by charging after the battery cell 12 is discharged. The battery cell 12 may include, but is not limited to, a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, and the like.

[0051] The battery cell 12 may include a housing 126, an electrode assembly 125, and a cover plate 122. The housing 126 has a connected cavity and a mounting port. The number of electrode assemblies 125 may be one or more; the electrode assembly 125 is mounted in the cavity of the housing 126. The cover plate 122 is connected to the housing 126 and covers the mounting port. The housing 126 is filled with an electrolyte, such as an electrolyte.

[0052] The electrode assembly 125 may include an anode electrode sheet and a cathode electrode sheet, and a separator disposed between the anode electrode sheet and the cathode electrode sheet. During the charge and discharge process of the battery cell 12, active ions (such as lithium ions) are inserted and removed back and forth between the anode electrode sheet and the cathode electrode sheet. The separator can prevent the anode electrode sheet and the cathode electrode sheet from short-circuiting to a certain extent, and can allow active ions to pass through.

[0053] The battery cell 12 may also include a safety valve 124 (also referred to as a pressure relief valve), two electrical connections 123 and two connection members 121 (also referred to as current collecting members). The safety valve 124 may be provided on the cover plate 122, for example, the safety valve 124 is fixed on the cover plate 122, and the safety valve 124 is used to actuate when the internal pressure or temperature of the battery cell 12 reaches a threshold value to discharge the internal electrolyte to reduce the internal pressure or temperature of the battery cell 12. For example, the safety valve 124 may be a temperature-sensitive valve, a pressure-sensitive valve, etc. The two electrical connections 123 may be provided on the cover plate 122. The electrical connection 123 may be an electrode terminal. The two electrical connections 123 are respectively a positive electrode terminal and a negative electrode terminal, and one electrical connection 123 is connected to one connection member 121 accordingly. The connection member 121 is located between the cover plate 122 and the electrode assembly 125, and is used to electrically connect the electrode assembly 125 and the electrical connection 123. The shell 126 is a hollow structure, and the material of the shell 126 can be metal or plastic; for example, the material of the shell 126 can be copper, iron, aluminum, steel, aluminum alloy, etc.

[0054] The electrical connection part 123 may refer to a conductive part outside the battery cell 12, which is used to connect to the positive and negative electrodes of the electrode assembly 125 inside the battery cell 12, and to provide an interface for current in and out outside the battery cell 12. The electrical connection part 123 may be a metal sheet or a metal rod, and the material may include but is not limited to copper, aluminum or other metals with good conductivity. The cross-section of the electrical connection part 123 may include but is not limited to a rectangle, a circle, an ellipse, etc.

[0055] See also Figures 4 to 6 The battery device 1 further includes a connection component 13. The connection component 13 includes a flow collection component 131 and a sampling component 132. The flow collection component 131 is connected to the electrical connection parts 123 of the plurality of battery cells 12. The flow collection component 131 includes a sheet-like body 1310; wherein the side of the sheet-like body 1310 has a plug-in slot 1311, and the side of the plug-in slot 1311 includes two first side surfaces 1311a arranged opposite to each other along the thickness direction of the sheet-like body 1310. The first end of the sampling component 132 is inserted into the plug-in slot 1311 and contacts the two first side surfaces 1311a respectively.

[0056] In some examples, the electrical connection parts 123 of multiple battery cells 12 are in contact and connected with the surface of the confluence component 131 close to the battery cell 12, and are staggered with the sampling component 132 to reduce the risk of interference between the sampling component 132 and the electrical connection parts 123 of multiple battery cells 12. In other examples, the electrical connection parts 123 of multiple battery cells 12 are in contact and connected with the side of the confluence component 131. Hereinafter, the example in which the confluence component 131 is in contact and connected with the electrical connection parts 123 of the battery cell 12, and the sampling component 132 is not in contact and connected with the electrical connection parts 123 of the battery cell 12 is used for explanation. Among them, the connection assembly 13 is located in the battery case 11.

[0057] The busbar 131 may refer to a conductive component connected to the electrical connection portion 123, and is used to electrically connect two or more battery cells 12, or to connect the battery cells 12 to other electrical connection components. The main function of the busbar 131 is to smoothly transmit current from one electrical connection portion 123 to another electrical connection portion 123 or electrical connection component. The busbar 131 may be understood as a busbar, and the busbar may be a metal bar.

[0058] The battery device 1 may also include a signal acquisition circuit 14; the sampling component 132 may be a conductive component, such as a metal sheet, connecting the signal acquisition circuit 14 and the confluence component 131. The signal acquisition circuit 14 is used to monitor and sample various parameters of the battery cell 12 (including but not limited to voltage, current, resistance, and temperature, etc.) so as to monitor the health and performance of the battery device 1 in real time. The signal acquisition circuit 14 may be, but is not limited to, a hard circuit (PCB) and a flexible circuit (FPC). The signal acquisition circuit 14 is connected to the battery cell 12 through the sampling component 132 and the confluence component 131.

[0059] The confluence component 131 includes a sheet-like body 1310. The sheet-like body 1310 is in the shape of a sheet, which generally has a flat shape, has two dimensions (length and width) that are relatively large in three-dimensional space, and has a third dimension (thickness) that is relatively small.

[0060] By inserting the first end of the sampling component 132 into the insertion slot 1311 and respectively contacting the two first side surfaces 1311a of the insertion slot 1311, the electrical connection between the sampling component 132 and the confluence component 131 is achieved. The connection method is simple and quick; compared with welding, the requirements for the equipment that connects the confluence component 131 and the sampling component 132 are lower.

[0061] In one embodiment, see Figure 7 The first end of the sampling component 132 has a first limiting structure 1321, and the side of the plug-in slot 1311 has a second limiting structure 1311b, and the first limiting structure 1321 is engaged with the second limiting structure 1311b.

[0062] The first limiting structure 1321 and the second limiting structure 1311b can cooperate to limit the range of motion, position or angle of the sampling component 132. The first limiting structure 1321 and the second limiting structure 1311b can be connected by being locked, biting or embedded with each other, thereby keeping the position between the sampling component 132 and the confluence component 131 relatively fixed, reducing the risk of abnormal contact resistance between the sampling component 132 and the confluence component 131, and facilitating the stability of the electrical connection between the sampling component 132 and the confluence component 131.

[0063] In one embodiment, see Figure 5 and Figure 7 , the sampling component 132 is a conductive sheet. The two opposite sides of the first end of the sampling component 132 are both provided with a first limiting structure 1321. The side of the plug slot 1311 also includes two oppositely arranged second side surfaces 1311c, each second side surface 1311c connects the two first side surfaces 1311a. The two second side surfaces 1311c are both provided with a second limiting structure 1311b.

[0064] The sampling component 132 may be a sheet-like structure having a flat shape, with two dimensions (length and width) being relatively large in three-dimensional space and the third dimension (thickness) being relatively small. The material of the sampling component 132 is a conductive material; optionally, the material of the sampling component 132 is nickel, in which case the sampling component 132 may be called a nickel sheet.

[0065] The two opposite sides of the first end of the sampling component 132 are defined as side A and side B. Side A and side B are disposed opposite to each other along a direction perpendicular to the thickness of the sampling component 132. Side A and side B are provided with a first limiting structure 1321, respectively.

[0066] The first limiting structure 1321 on the side A and the first limiting structure 1321 on the side B can be the same structure or different structures; the second limiting structure 1311b on the two second sides 1311c can be the same structure or different structures; it is only necessary for the first limiting structure 1321 on the side A to match the second limiting structure 1311b on its corresponding second side 1311c, and the first limiting structure 1321 on the side B to match the second limiting structure 1311b on its corresponding second side 1311c, so as to achieve snap-fit ​​fixation.

[0067] By providing the first limiting structure 1321 on the two opposite side surfaces of the first end of the sampling component 132, and providing the second limiting structure 1311b on the two second side surfaces 1311c of the plug-in slot 1311, the snap connection between the sampling component 132 and the plug-in slot 1311 is constrained from two opposite directions, which can more effectively resist external forces from different directions, making the connection between the sampling component 132 and the plug-in slot 1311 more stable.

[0068] In one embodiment, see Figure 7The sampling component 132 includes a body 132a and a protrusion 132b, and the two opposite sides of the first end of the body are provided with protrusions 132b as the first limiting structure 1321. Optionally, the body 132a and the protrusion 132b are integrally formed, for example, the body 132a and the protrusion 132b are integrally formed by injection molding. The cross-sectional shape of the protrusion 132b is a right triangle, wherein the cross-sectional shape refers to the cross-sectional shape along the insertion direction of the sampling component 132; a right angle of the right triangle is connected to the side of the first end of the body 132a; along the depth direction of the plug-in slot 1311, the distance between the hypotenuse of the right triangle and the side of the first end of the body 132a gradually decreases. By performing the above-mentioned arrangement of the protrusion, the sampling component 132 is convenient to be inserted into the plug-in slot 1311. It can be understood that the two second side surfaces 1311c of the insertion slot 1311 are both provided with a recessed portion as the second limiting structure 1311b, the recessed portion is used to accommodate the protrusion 132b, and the structure and size of the recessed portion are matched with the protrusion 132b. By performing the above-mentioned configuration on the structure of the sampling component 132, it is convenient for the sampling component 132 to be inserted into the insertion slot 1311.

[0069] In one embodiment, a side surface of the sheet body 1310 has a plurality of inserting slots 1311 , and the sampling components 132 are inserted into some of the inserting slots 1311 .

[0070] Each battery cell 12 corresponds to a plurality of plug-in slots 1311. In other words, a plurality of plug-in slots 1311 can be electrically connected to the same battery cell 12. By providing a plurality of plug-in slots 1311 on the side of the sheet-like body 1310, some of the plug-in slots 1311 are inserted with sampling components 132, and some of the plug-in slots 1311 are in an empty state and can be used as spare plug-in slots 1311. When the connection between the sampling component 132 and the plug-in slot 1311 is unstable, another new sampling component 132 can be inserted into the spare plug-in slot 1311. The replacement method is simple, and the confluence component 131 does not need to be replaced, which is conducive to cost saving.

[0071] In one embodiment, the plurality of insertion slots 1311 are arranged along a direction perpendicular to the thickness of the sheet body 1310. The above arrangement is helpful to improve the strength of the sheet body 1310.

[0072] In one embodiment, a plurality of insertion slots 1311 are stacked along the thickness direction of the sheet body 1310. Through the above arrangement, the arrangement structure of the plurality of insertion slots 1311 corresponding to each battery cell 12 is relatively compact, and when the plurality of battery cells 12 are closely arranged, each battery cell 12 can also be provided with a plurality of insertion slots 1311.

[0073] Exemplarily, three plugging slots 1311 are stacked along the thickness direction of the sheet body 1310 , and the sheet body 1310 is kept at a high strength on the basis of providing spare plugging slots 1311 .

[0074] In one embodiment, the battery device 1 further includes a signal acquisition circuit 14 disposed on one side of the sampling component 132, and the signal acquisition circuit 14 is electrically connected to the sampling component 132. The surface of the signal acquisition circuit 14 away from the battery cell 12 is lower than the surface of the sampling component 132 away from the battery cell 12. The sampling component 132 is inserted into the insertion slot 1311 farthest from the battery cell 12 among the multiple insertion slots 1311.

[0075] Through the above configuration, the signal acquisition circuit 14 is electrically connected to the battery cell 12 via the sampling component 132 and the confluence component 131 , so that the signal acquisition circuit 14 can collect data of the battery cell 12 , thereby monitoring the use status of the battery cell 12 .

[0076] In one embodiment, the side surface of the insertion slot 1311 and the outer surface of the first end of the sampling component 132 are both provided with an ohmic contact layer; the resistivity of the converging component 131 and the resistivity of the sampling component 132 are both greater than the resistivity of the ohmic contact layer.

[0077] The ohmic contact layer can transmit current. By providing the ohmic contact layer on the side of the plug slot 1311 and the outer surface of the first end of the sampling component 132, the resistivity of the converging component 131 and the resistivity of the sampling component 132 are both greater than the resistivity of the ohmic contact layer, and the current can easily flow between the plug slot 1311 of the converging component 131 and the first end of the sampling component 132, with almost no potential barrier or only a very small potential barrier to hinder the transmission of the current.

[0078] Optionally, the ohmic contact layer is a metal plating layer, such as a gold plating layer, a silver plating layer, etc.

[0079] In one embodiment, the sheet body 1310 is an integrally formed structure.

[0080] By setting the sheet body 1310 as an integrally formed structure, the plug-in slot 1311 on the side of the sheet body 1310 is also an integral structure, and is not a plug-in slot 1311 formed by splicing multiple structural parts. This reduces the steps of the assembly process, maintains the long-term structural stability of the plug-in slot 1311, and is conducive to maintaining the stability of the connection between the plug-in slot 1311 and the sampling component 132.

[0081] Optionally, the sheet body 1310 is an integrally formed structure by injection molding.

[0082] In one embodiment, the sampling component 132 is a conductive sheet; along the thickness direction of the sheet-like body 1310 , the first end of the sampling component 132 is interference-fitted with the insertion slot 1311 .

[0083] The sampling component 132 may be a sheet-like structure having a flat shape, with two dimensions (length and width) being relatively large in three-dimensional space and the third dimension (thickness) being relatively small. The material of the sampling component 132 is a conductive material; optionally, the material of the sampling component 132 is nickel, in which case the sampling component 132 may be called a nickel sheet.

[0084] The interference fit between the first end of the sampling component 132 and the insertion slot 1311 means that the thickness of the first end of the sampling component 132 is slightly larger than the distance between the two first side surfaces 1311a of the insertion slot 1311. By setting the first end of the sampling component 132 and the insertion slot 1311 to have an interference fit, it is beneficial to improve the connection stability between the sampling component 132 and the converging component 131, thereby maintaining the stability of the signal acquisition circuit 14 in acquiring data from the battery cell 12.

[0085] The above description is only an implementation method of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Multiple battery cells; A connection component, the connection component comprising a collection component and a sampling component; the collection component is electrically connected to the electrical connection parts of the plurality of battery cells, the collection component comprising a sheet-shaped body; The side of the sheet body has an insertion groove, and the side of the insertion groove includes two first side surfaces arranged opposite to each other along the thickness direction of the sheet body; the first end of the sampling component is inserted into the insertion groove and contacts the two first side surfaces respectively.

2. The battery device according to claim 1, characterized in that: The first end of the sampling component has a first limiting structure, and the side surface of the plug-in slot has a second limiting structure, and the first limiting structure is engaged with the second limiting structure.

3. The battery device according to claim 2, characterized in that: The sampling component is a conductive sheet, and the two opposite sides of the first end of the sampling component are both provided with the first limiting structure; the side of the plug-in slot also includes two oppositely arranged second side surfaces, each of which connects two first side surfaces; and the two second side surfaces both have the second limiting structure.

4. The battery device according to claim 1, characterized in that: The side surface of the sheet-like body is provided with a plurality of the inserting grooves, and the sampling components are inserted into some of the inserting grooves.

5. The battery device according to claim 4, characterized in that: A plurality of the inserting grooves are stacked along the thickness direction of the sheet-like body.

6. The battery device according to claim 5, characterized in that: The battery device also includes a signal acquisition circuit arranged on one side of the sampling component; the signal acquisition circuit is electrically connected to the sampling component; the surface of the signal acquisition circuit away from the battery cell is lower than the surface of the sampling component away from the battery cell; the sampling component is inserted into the insertion slot farthest from the battery cell among the multiple insertion slots.

7. The battery device according to claim 1, characterized in that: The side surface of the plug slot and the outer surface of the first end of the sampling component are both provided with an ohmic contact layer; the resistivity of the converging component and the resistivity of the sampling component are both greater than the resistivity of the ohmic contact layer.

8. The battery device according to any one of claims 1 to 7, characterized in that: The sheet-like body is an integrally formed structure.

9. The battery device according to any one of claims 1 to 7, characterized in that: The sampling component is a conductive sheet; along the thickness direction of the sheet-like body, the first end of the sampling component is interference-fitted with the plug-in slot.

10. An electrical device, characterized in that: include: A device body and a battery device as claimed in any one of claims 1 to 9, wherein the battery device is arranged in the device body.

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