Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The problem that an existing battery device is low in reliability is solved. The battery device comprises a connecting assembly and a plurality of single batteries, the connecting assembly comprises a confluence component and a sampling component; the confluence component is connected with the electrode terminals of the plurality of battery monomers; at least part of the sampling component is in contact with the surface, facing the battery monomers, of the confluence component, and the sampling component is electrically connected with the confluence component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization equipment. BACKGROUND

[0002] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device can be a power battery, and the battery device can also be an energy storage battery. Among them, in the battery device, the electrode terminal of the battery monomer is connected with the bar sheet. However, the connection reliability between the electrode terminal and the bar sheet is low, so that the reliability of the battery device is low. CONTENT OF UTILITY MODEL

[0003] The technical problem solved by the present application is to provide a battery device and a power utilization equipment, and to solve the problem of low reliability of the existing battery device.

[0004] To solve the above technical problem, the first technical solution adopted by the present application is to provide a battery device, which comprises a connecting assembly and a plurality of battery monomers; the connecting assembly comprises a busbar component and a sampling component; the busbar component is connected with the electrode terminal of the plurality of battery monomers; at least part of the sampling component is in contact with the surface of the busbar component facing the battery monomer, and the sampling component is electrically connected with the busbar component.

[0005] In the embodiment, when the busbar component is connected with the electrode terminal through the copper mouth, the copper mouth is placed on the surface of the busbar component away from the battery monomer, and at least part of the sampling component is in contact with the surface of the busbar component facing the battery monomer, so that the copper mouth and the sampling component do not easily interfere with each other, the copper mouth is in contact with the busbar component and not in contact with the sampling component, thereby eliminating the gap between the copper mouth and the busbar component, so that the copper mouth can better press the busbar component to the electrode terminal of the battery monomer, so as to facilitate the connection of the busbar component with the electrode terminal of the battery monomer, thereby improving the connection reliability of the busbar component with the electrode terminal, and further improving the reliability of the battery device.

[0006] In some embodiments, the connecting assembly further comprises a clamping component, which clamps at least part of the sampling component on the surface of the busbar component facing the battery monomer.

[0007] In the embodiment, the clamping component can be used to increase the connection stability between the busbar component and the sampling component, thereby improving the reliability of the battery device.

[0008] In some embodiments, the clamping component comprises a first clamping wall, a connecting portion and a second clamping wall connected in sequence; the first clamping wall is arranged opposite to the second clamping wall along the stacking direction of the sampling component and the busbar component; the connecting portion is connected between the first clamping wall and the second clamping wall; the first clamping wall and the second clamping wall cooperate with each other to clamp at least part of the sampling component on the surface of the busbar component facing the battery monomer.

[0009] In the embodiment, the clamping component has a simple structure and is convenient to operate. The sampling component and the busbar component can be conveniently disassembled and assembled, so that the assembly speed of the sampling component and the busbar component can be accelerated, and the assembly speed of the battery device can be improved.

[0010] In some embodiments, the surface of the busbar component facing the battery monomer has a first groove, and the sampling component comprises a first part and a second part distributed along a first direction; the first part is connected with the second part, the first part is located in the first groove and contacts the surface of the first groove facing the battery monomer, and the second part is located outside the first groove.

[0011] In the embodiment, the first part of the sampling component is located in the first groove, so that the first groove hides the first part. The first part contacts the surface of the first groove facing the battery monomer, so that the contact area of the electrical connection between the first part and the first groove is large, thereby increasing the connection reliability of the first part and the busbar component, and improving the reliability of the battery device.

[0012] In some embodiments, the first side surface of the busbar component has a first opening, the first opening is in communication with the first groove; the first direction intersects the first side surface; the second part passes through the first opening and is located outside the busbar component.

[0013] In the embodiment, the first part is located in the first groove, and the second part passes out of the first groove through the first opening; the overall thickness of the busbar component and the first part along the stacking direction can be reduced, so that the distance between the busbar component and the inner surface of the upper box is increased, the risk of the busbar component and the upper box extruding the signal acquisition circuit located therebetween when the battery monomer expands is reduced, and the reliability of the battery device is improved.

[0014] In some embodiments, the surface of the first part facing the battery monomer is flush with the surface of the busbar component facing the battery monomer, and the surface of the first part facing the battery monomer and the surface of the busbar component facing the battery monomer both contact the second clamping wall.

[0015] In the embodiment, the second clamping wall can be in contact with both the surface of the first portion facing the battery monomer and the surface of the busbar component facing the battery monomer, so that the clamping component can clamp the first portion of the sampling component on the busbar component more firmly, thereby improving the connection reliability of the sampling component and the busbar component, and further improving the reliability of the battery device.

[0016] In some embodiments, the connecting assembly further comprises a glue portion; the glue portion adhesively fixes the first portion and the busbar component.

[0017] In the embodiment, the glue portion can serve to fix the sampling component and the busbar component again, thereby improving the connection reliability of the sampling component and the busbar component, and further improving the reliability of the battery device.

[0018] In some embodiments, the busbar component has a glue hole extending from the surface of the busbar component facing away from the battery monomer into the first groove; the first portion covers the glue hole; and the glue portion is located in the glue hole and adhesively fixed with both the surface of the first portion facing away from the battery monomer and the hole wall of the glue hole.

[0019] In the embodiment, the glue hole extends from the surface of the busbar component facing away from the battery monomer into the first groove, so as to facilitate the installation of the glue portion from the side of the surface of the busbar component facing away from the battery monomer and the fixed connection of the first portion and the hole wall of the glue hole.

[0020] In some embodiments, the glue portion is a glue body whose adhesiveness can be released under certain conditions.

[0021] In the embodiment, under normal use, the glue portion can serve to fix the sampling component and the busbar component again. Under special conditions, the adhesiveness of the glue portion is reduced, so that the first portion is separated from the hole wall of the glue hole, so as to facilitate the replacement, maintenance or recycling of the busbar component and / or the sampling component.

[0022] In some embodiments, the surface of the busbar component facing away from the battery monomer has a second groove; the first end surface of the busbar component has a second opening in communication with the second groove; the second opening is provided for the first clamping wall to pass through, and the first clamping wall is located in the second groove; the first end surface is transverse to the second direction, and the first direction is transverse to the second direction.

[0023] In the embodiment, the first clamping wall is located in the second groove, so that the second groove can accommodate the second clamping wall, thereby reducing the overall thickness of the second clamping wall and the busbar component along the stacking direction, increasing the distance between the busbar component or the second clamping wall and the inner surface of the upper box body, thereby reducing the risk of the busbar component or the second clamping wall pressing the signal acquisition circuit located therebetween when the battery monomer swells, and further improving the reliability of the battery device.

[0024] In some embodiments, the surface of the first clamping wall away from the battery cell is flush with the surface of the busbar component away from the battery cell; or, the surface of the first clamping wall away from the battery cell is lower than the surface of the busbar component away from the battery cell.

[0025] In the present embodiment, the overall thickness of the second clamping wall and the busbar component in the stacking direction is the thickness of the busbar component, so that the distance between the busbar component and the inner surface of the upper box is further increased, thereby further reducing the risk of the busbar component and the upper box pressing the signal acquisition circuit located therebetween when the battery cell expands, and further improving the reliability of the battery device.

[0026] In some embodiments, in the first direction, one of the side surface of the second groove and the side surface of the first clamping wall has a limiting groove, and the other has a limiting portion, and the limiting portion is clamped in the limiting groove.

[0027] In the present embodiment, through the cooperation of the limiting groove and the limiting portion, the risk of the first clamping wall shaking or falling in the second direction in the second groove can be reduced, so that the clamping component can better clamp the busbar component and the sampling component, thereby improving the reliability of the battery device.

[0028] In some embodiments, the busbar component is arranged at the top and / or bottom of the plurality of battery cells; and the entire sampling component is located on the side of the busbar component facing the battery cells.

[0029] In the present embodiment, the entire sampling component is located on the side of the busbar component facing the battery cells, so that the distance between the part of the sampling component located outside the busbar component and the inner surface of the upper box is greater than the distance between the busbar component and the inner surface of the upper box, thereby further reducing the risk of the sampling component and the upper box pressing the signal acquisition circuit located therebetween when the battery cell expands, and further improving the reliability of the battery device.

[0030] In some embodiments, the connecting assembly further comprises a glue portion; at least part of the sampling component is bonded to the busbar component through the glue portion.

[0031] In the present embodiment, the glue portion can be used to quickly fix and connect the sampling component and the busbar component, thereby improving the assembly speed of the battery device.

[0032] To solve the above technical problems, the second technical solution provided by the present application is to provide an electric device, which comprises a device main body and the above-mentioned battery device, and the battery device is arranged in the device main body. The electric device contains the above-mentioned battery device, so the electric device has the same effect as the above-mentioned battery device. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0034] Figure 1 is a structural schematic diagram of the power utilization equipment provided by the present application;

[0035] Figure 2 is a structural schematic diagram of the battery device provided by the present application;

[0036] Figure 3 is a structural schematic diagram of the battery monomer provided by the present application;

[0037] Figure 4 is an exploded view of the connecting assembly provided by the present application;

[0038] Figure 5 is a top view of the connecting assembly provided by the present application;

[0039] Figure 6 is a front view of the connecting assembly provided by the present application;

[0040] Figure 7 is a structural schematic diagram of the clamping component provided by the present application;

[0041] Figure 8 is a structural schematic diagram of the battery monomer and the connecting assembly provided by the present application;

[0042] Figure 9 is a top view of the connecting assembly from another perspective provided by the present application.

[0043] In the drawings: 1, battery device; 11, battery box body; 111, upper box body; 112, lower box body; 12, battery monomer; 121, connecting member; 122, cover plate; 123, electrode terminal; 124, safety valve; 125, electrode assembly; 126, shell; 13, connecting assembly; 131, converging component; 1311, first end face; 1312, first side face; 1313, second recess; 1314, first opening; 1315, second opening; 1316, glue hole; 1317, first recess; 1318, first surface; 1319, second surface; 132, sampling component; 1321, first part; 1322, second part; 133, clamping component; 1331, first clamping wall; 1332, connecting part; 1333, second clamping wall; 1334, limiting part; 1335, limiting groove; 134, glue part; 135, conductor component; 2, equipment main body. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the specification.

[0045] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. The present application may, however, be practiced without some or all of these details. Otherwise, well known structures have not been described in detail in order not to obscure the understanding of this description.

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of the present application.

[0047] The terms "first", "second", "third" in the present application are used only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are used only for explaining the relative position relationship, movement condition, etc. between the components, if the specific posture (as shown in the drawings) changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples from a much larger number of embodiments that can be claimed.

[0049] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device can be a power battery, which is a power supply for providing power source for tools. The power battery refers to the storage battery for providing power for electric vehicles, electric trains, electric bicycles, golf carts and other transportation tools, aerospace, etc. Of course, the battery device can also be an energy storage battery, which refers to the storage battery for storing renewable energy such as hydropower, thermal power, wind power and solar power station. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0050] The battery device can include a signal acquisition circuit, a tab, a nickel sheet and a plurality of battery monomers. In the production process, after the nickel sheet is connected to the surface (for example, the top surface of the tab) of the tab away from the battery monomer, the copper nozzle is placed on the surface of the tab away from the battery monomer, and the tab is pressed on the electrode terminal of the battery monomer, and then the laser of the welding equipment passes through the copper nozzle to weld the tab and the electrode terminal of the battery monomer, so that the tab is connected in series or parallel with the electrode terminal of the plurality of battery monomers. Among them, the nickel sheet is electrically connected with the signal acquisition circuit; the signal acquisition circuit is used for monitoring and sampling various parameters (including but not limited to voltage, current, resistance and temperature, etc.) of the battery monomer, so as to monitor the health status and performance of the battery device in real time. The structure of the copper nozzle and the connection relationship between the copper nozzle and the tab are prior art, for example, the copper nozzle is welded with the tab, and for example, the copper nozzle is in abutment with the tab.

[0051] Among them, since the nickel sheet and the copper nozzle are both located on the surface (for example, the top surface of the tab) of the tab away from the battery monomer, the interference between the nickel sheet and the copper nozzle occurs, and with the decrease of the size of the battery monomer and the tab, the interference between the nickel sheet and the copper nozzle is more and more obvious, so that part of the copper nozzle is located on the surface (for example, the top surface of the tab) of the tab away from the battery monomer, and the other part of the copper nozzle is located on the surface (for example, the top surface of the nickel sheet) of the nickel sheet away from the battery monomer. The gap is formed between the bottom surface of the copper nozzle, the top surface of the tab and the side surface of the nickel sheet, so that the copper nozzle cannot press the tab tightly to the electrode terminal of the battery monomer, thereby reducing the connection reliability between the tab and the electrode terminal of the battery monomer, and the reliability of the battery device is low.

[0052] In order to solve the problem of low reliability of the battery device, the embodiment of the present application also provides a battery device, which comprises a connecting assembly and a plurality of battery monomers; the connecting assembly comprises a current collecting component (for example, a tab) and a sampling component (for example, a nickel sheet); the current collecting component is connected with the electrode terminal of the plurality of battery monomers; at least part of the sampling component is in contact with the surface of the current collecting component facing the battery monomers, and the sampling component is electrically connected with the current collecting component. In the embodiment, when the copper mouth is used to connect the current collecting component and the electrode terminal, the copper mouth is placed on the surface of the current collecting component away from the battery monomers, and at least part of the sampling component is in contact with the surface of the current collecting component facing the battery monomers, so that the copper mouth and the sampling component do not easily interfere with each other, the copper mouth is in contact with the current collecting component and not in contact with the sampling component, thereby eliminating the gap between the copper mouth and the current collecting component, so that the copper mouth can better press the current collecting component to the electrode terminal of the battery monomers, so as to facilitate the connection of the current collecting component and the electrode terminal of the battery monomers, thereby improving the connection reliability of the current collecting component and the electrode terminal, and further improving the reliability of the battery device.

[0053] The embodiment of the present application provides a power consuming device, referring to Figure 1 The power consuming device can comprise a device body 2 and a battery device 1, and the battery device 1 is arranged on the device body 2. The battery device 1 is used to supply power to the power consuming components of the device body 2, so that the device body 2 can work.

[0054] The power consuming components can be elements that can consume power; for example, the power consuming components can be controllers and electronic elements, and the controller can 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.

[0055] The power consuming device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. In the following embodiments, the power consuming device is taken as a vehicle for example.

[0056] In some examples, the electrical device can be a vehicle, the device body 2 can be a vehicle frame, and the battery device 1 is mounted on the vehicle frame. The electrical device can be a lamp (e.g., a headlight, a taillight, etc.), a display screen, an instrument panel, a control system (e.g., a controller), etc. of the vehicle. The electrical device is mounted on the vehicle body.

[0057] Embodiments of the present application also provide a battery device, referring to Figures 2 to 6 , the battery device 1 includes a connection assembly 13 and a plurality of battery cells 12; the connection assembly 13 includes a busbar component 131 and a sampling component 132; the busbar component 131 is connected with electrode terminals 123 of the plurality of battery cells 12; at least part of the sampling component 132 is in contact with a surface of the busbar component 131 facing the battery cells 12, and the sampling component 132 is electrically connected with the busbar component 131.

[0058] Referring to Figure 2 , the battery device 1 can further include a battery box 11; the battery box 11 has a cavity, and the plurality of battery cells 12 are contained in the containing cavity; the battery box 11 can play a role in protecting the battery cells 12, and also facilitates the concentration of the plurality of battery cells 12. In some examples, the battery box 11 can include an upper box 111 and a lower box 112, and the upper box 111 is covered on the lower box 112.

[0059] Referring to Figure 3 , the battery cell 12 can be a secondary battery, which refers to a battery cell 12 that can be activated by charging after discharging. The battery cell 12 can 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-acid battery, etc.

[0060] The battery cell 12 can include a shell 126, an electrode assembly 125, and a cover plate 122. The shell 126 has a communicating cavity and a mounting port. The number of the electrode assembly 125 can be one or more; the electrode assembly 125 is mounted in the cavity of the shell 126. The cover plate 122 is connected with the shell 126 and covers the mounting port. The shell 126 is filled with an electrolyte, such as an electrolyte solution.

[0061] The electrode assembly 125 can include an anode tab and a cathode tab, and a separator film disposed between the anode tab and the cathode tab. During the charging and discharging process of the battery cell 12, active ions (e.g., lithium ions) are embedded and extracted between the anode tab and the cathode tab. The separator film can prevent the anode tab from short-circuiting with the cathode tab to some extent, while allowing the active ions to pass through.

[0062] The battery cell 12 can further include a safety valve 124 (may also be referred to as a pressure relief valve), two electrode terminals 123, and two connecting members 121 (may also be referred to as current collecting members). The safety valve 124 can be disposed 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 to release the internal electrolyte when the internal pressure or temperature of the battery cell 12 reaches a threshold value, so as to reduce the internal pressure or temperature of the battery cell 12. For example, the safety valve 124 can be a temperature-sensitive valve, a pressure-sensitive valve, etc. The two electrode terminals 123 can be disposed on the cover plate 122, and the two electrode terminals 123 are respectively a positive electrode terminal and a negative electrode terminal, and one electrode terminal 123 is connected with one connecting member 121. The connecting 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 electrode terminal 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.

[0063] The electrode terminal 123 can refer to a conductive component outside the battery cell 12, which is used to connect with the positive electrode and the negative electrode of the electrode assembly 125 inside the battery cell 12, and is used to provide an interface for the current to enter and exit outside the battery cell 12. The electrode terminal 123 can be a metal sheet or a metal rod, and the material can include but is not limited to copper, aluminum or other metals with good conductivity. Among them, the cross section of the electrode terminal 123 can include but is not limited to rectangle, circle and ellipse, etc.

[0064] For example, the current collecting component 131 is only connected with the electrode terminals 123 of the plurality of battery cells 12. For another example, the current collecting component 131 and the sampling component 132 are both connected with the electrode terminals 123 of the battery cell 12. In some examples, the electrode terminals 123 of the plurality of battery cells 12 are in contact connection with the current collecting component 131 close to the surface of the battery cell 12, and are arranged away from the sampling component 132, so as to reduce the risk of interference between the sampling component 132 and the electrode terminals 123 of the plurality of battery cells 12. In another example, the electrode terminals 123 of the plurality of battery cells 12 are in contact connection with the side surface of the current collecting component 131. Hereinafter, the current collecting component 131 is in contact connection with the electrode terminals 123 of the battery cell 12, and the sampling component 132 is not in contact connection with the electrode terminals 123 of the battery cell 12. Among them, the connecting assembly 13 is located in the battery box 11.

[0065] The current collecting component 131 can refer to a conductive component for connecting the electrode terminals 123, which is used to electrically connect two or more battery cells 12, or connect the battery cell 12 with other current collecting components. The main function of the current collecting component 131 is to smoothly transmit the current from one electrode terminal 123 to another electrode terminal 123 or current collecting component. The current collecting component 131 can be understood as a busbar, and the busbar can be a metal busbar.

[0066] The sampling component 132 can be a conductive component, such as a metal sheet, connecting the signal collection circuit and the busbar component 131. The battery device 1 can further include a signal collection circuit for monitoring and sampling various parameters of the battery cell 12, including but not limited to voltage, current, resistance, temperature, and the like, so as to monitor the health and performance of the battery device 1 in real time. The signal collection circuit can be, but is not limited to, a hard circuit and a flexible circuit. The signal collection circuit is connected to the busbar component 131 of the battery cell 12 through the sampling component 132.

[0067] The sampling component 132 is a flat plate structure, and the material of the sampling component 132 is nickel. In this case, the sampling component 132 can be referred to as a nickel sheet. The busbar component 131 is a flat plate structure, and the busbar component 131 can be referred to as a busbar sheet (e.g., a busbar sheet). The connecting assembly 13 further includes a conductor component 135 fixedly connected to the busbar component 131. For example, the conductor component 135 and the busbar component 131 are integrally formed. The conductor component 135 can be a curved structure, which can be arranged at the corner of the top surface and the side surface of the battery cell 12. The conductor component 135 can also be a flat plate structure.

[0068] In some examples, the sampling component 132 and the busbar component 131 can be a single layer structure, which is a conductive layer. In this case, at least part of the sampling component 132 and the busbar component 131 are in contact with the surface of the battery cell 12, so that the sampling component 132 and the busbar component 131 are in contact and electrically connected. In addition, a conductive structure can be used to further enhance the electrical connection reliability of the busbar component 131 and the sampling component 132. For example, the conductive structure can be a conductive clamping component 133. The busbar component 131 can be, but is not limited to, made of a metal material with good electrical conductivity, such as copper, aluminum, or other alloys. The sampling component 132 can be, but is not limited to, a nickel sheet, a copper sheet, a silver sheet, a gold sheet, and the like.

[0069] In other examples, the sampling component 132 and / or the busbar component 131 can be a multi-layer structure, which includes a conductive layer and an insulating layer arranged in layers. When there is an insulating layer between at least part of the sampling component 132 and the surface of the busbar component 131 facing the battery cell 12, the conductive layer of the busbar component 131 and the conductive layer of the sampling component 132 can be electrically connected through a conductive structure, which can be a conductive clamping component 133 or a metal connecting piece. The material of the conductive layer can be, but is not limited to, made of a metal material with good electrical conductivity, such as copper, nickel, gold, aluminum, or other alloys.

[0070] In some examples, at least part of the sampling component 132 is welded on the surface of the busbar component 131 facing the battery cell 12. In other examples, at least part of the sampling component 132 is fixed on the surface of the busbar component 131 facing the battery cell 12 by the clamping component 133. In other examples, at least part of the sampling component 132 is in contact with the surface of the busbar component 131 facing the battery cell 12 and is bonded by the glue component 134. In other examples, at least part of the sampling component 132 is inserted into the first groove 1317 of the busbar component 131. Wherein, for the convenience of description, the surface of the busbar component 131 facing the battery cell 12 is referred to as the second surface 1319, and the surface of the busbar component 131 facing away from the battery cell 12 is referred to as the first surface 1318; the first surface 1318 and the second surface 1319 are oppositely arranged along the thickness direction of the battery module.

[0071] In some examples, part of the sampling component 132 is in contact with the surface of the busbar component 131 facing the battery cell 12. In other examples, the entire sampling component 132 is in contact with the surface of the busbar component 131 facing the battery cell 12.

[0072] In some examples, the electrode terminal 123 of the battery cell 12 is located at the top, the busbar component 131 is arranged at the top of the plurality of battery cells 12, at this time, the sampling component 132 is located between the busbar component 131 and the top of the plurality of battery cells 12, and the surface of the busbar component 131 facing the battery cell 12 is the bottom surface of the busbar component 131. In other examples, the electrode terminal 123 of the battery cell 12 is located at the bottom, the busbar component 131 is arranged at the bottom of the plurality of battery cells 12, at this time, the sampling component 132 is located between the busbar component 131 and the bottom of the plurality of battery cells 12, and the surface of the busbar component 131 facing the battery cell 12 is the top surface of the busbar component 131. In other examples, the electrode terminal 123 is located at the top and the bottom of the battery cell 12, and the busbar component 131 is arranged at the top and the bottom of the plurality of battery cells 12. In other examples, one busbar component 131 is arranged between two adjacent battery cells 12, at this time, the sampling component 132 is located between the busbar component 131 and the side surface of one battery cell 12, and the surface of the busbar component 131 facing the battery cell 12 is the side surface of the busbar component 131. Wherein, the top of the battery cell 12 is the side of the battery cell 12 where the electrode terminal 123 is arranged, the top of the battery cell 12 and the bottom of the battery cell 12 are oppositely arranged along the height direction of the battery cell 12, and the side surface of the battery cell 12 is located between the top and the bottom of the battery cell 12.

[0073] Referring to Figure 6In some examples, the busbar component 131 has a first groove 1317 towards the surface of the battery cell 12, and the sampling component 132 can be arranged in the first groove 1317. In other examples, the busbar component 131 has two protrusions towards the surface of the battery cell 12, and the sampling component 132 can be clamped between the two protrusions. In other examples, the busbar component 131 has a flat surface towards the surface of the battery cell 12, and the sampling component 132 can be arranged on the flat surface; the flat surface can be understood as a structure without protrusions and grooves.

[0074] Figure 8 In some examples, the busbar component 131 has a first groove 1317 towards the surface of the battery cell 12, and the sampling component 132 can be arranged in the first groove 1317. In other examples, the busbar component 131 has two protrusions towards the surface of the battery cell 12, and the sampling component 132 can be clamped between the two protrusions. In other examples, the busbar component 131 has a flat surface towards the surface of the battery cell 12, and the sampling component 132 can be arranged on the flat surface; the flat surface can be understood as a structure without protrusions and grooves. Figure 8 A schematic diagram of a busbar component 131 connecting two electrode terminals 123 of battery cells 12 is shown. Referring to FIG. 6, a busbar component 131 is in contact with two electrode terminals 123 of two battery cells 12, and a sampling component 132 is in contact with the busbar component 131. Figure 8 In some examples, the busbar component 131 has a first groove 1317 towards the surface of the battery cell 12, and the sampling component 132 can be arranged in the first groove 1317. In other examples, the busbar component 131 has two protrusions towards the surface of the battery cell 12, and the sampling component 132 can be clamped between the two protrusions. In other examples, the busbar component 131 has a flat surface towards the surface of the battery cell 12, and the sampling component 132 can be arranged on the flat surface; the flat surface can be understood as a structure without protrusions and grooves.

[0075] In the present embodiment, when the busbar component 131 is connected to the electrode terminal 123 by the copper mouth, the copper mouth is placed on the surface of the busbar component 131 (e.g., the tab) away from the battery cell 12, and at least part of the sampling component 132 is in contact with the surface of the busbar component 131 towards the battery cell 12, so that the copper mouth and the sampling component 132 do not easily interfere with each other, the copper mouth is in contact with the busbar component 131 and not in contact with the sampling component 132, thereby eliminating the gap between the copper mouth and the busbar component, so that the copper mouth can better press the busbar component 131 onto the electrode terminal 123 of the battery cell 12, facilitating the connection of the busbar component 131 to the electrode terminal 123 of the battery cell 12, thereby improving the connection reliability of the busbar component 131 to the electrode terminal 123 of the battery cell 12, and further improving the reliability of the battery device 1.

[0076] In addition, in the embodiment, the gap between the copper nozzle and the busbar component is eliminated, and the problem of welding slag coming out of the gap is also solved. In addition, during welding, all the laser beams passing through the copper nozzle are used to weld the busbar component 131 and the electrode terminal 123 of the battery cell 12, thereby solving the problem that the laser beams passing through the copper nozzle cannot be fully used to weld the tab and the electrode terminal 123 of the battery cell 12, and further improving the connection reliability of the busbar component 131 and the electrode terminal 123 of the battery cell 12.

[0077] In some embodiments, the connecting assembly 13 further comprises a clamping component 133 clamping at least part of the sampling component 132 on the surface of the busbar component 131 facing the battery cell 12.

[0078] The clamping component 133 can be a structure capable of clamping the busbar component 131 and the sampling component 132, for example, the clamping component 133 can also be a clip or the like, and for example, the clamping component 133 can be a structure described below.

[0079] The clamping component 133 can be made of a conductive material, which can be a metal element or a metal alloy. The metal element can be copper, iron, aluminum, or the like. At this time, the clamping component 133 can enable electrical connection between the busbar component 131 and the sampling component 132. In other examples, the clamping component 133 can be made of a non-conductive material, which can be plastic or the like.

[0080] In the embodiment, the clamping component 133 can increase the connection stability between the busbar component 131 and the sampling component 132, thereby improving the reliability of the battery device 1.

[0081] In some embodiments, referring to Figures 4 to 7 , the clamping component 133 comprises a first clamping wall 1331, a connecting portion 1332, and a second clamping wall 1333 connected in sequence. The first clamping wall 1331 and the second clamping wall 1333 are oppositely arranged along the stacking direction of the sampling component 132 and the busbar component 131. The connecting portion 1332 is connected between the first clamping wall 1331 and the second clamping wall 1333. The first clamping wall 1331 and the second clamping wall 1333 cooperate with each other to clamp at least part of the sampling component 132 on the surface of the busbar component 131 facing the battery cell 12.

[0082] The connecting portion 1332 is perpendicular to the first clamping wall 1331 and the second clamping wall 1333.

[0083] The first clamping wall 1331, the connecting part 1332, and the second clamping wall 1333 are in an integrated structure. The first clamping wall contacts the surface of the busbar component 131 away from the battery monomer 12, and the second clamping wall 1333 contacts at least the sampling component 132; for example, the second clamping wall 1333 only contacts the sampling component 132, and for another example, the second clamping wall 1333 contacts both the sampling component and the surface of the busbar component 131 facing the battery monomer 12.

[0084] The stacking direction of the sampling component 132 and the busbar component 131 is the height direction of the battery monomer 12.

[0085] In this embodiment, the clamping component 133 has a simple structure and is convenient to operate, facilitating the disassembly and assembly of the sampling component 132 and the busbar component 131, thereby accelerating the assembly speed of the sampling component 132 and the busbar component 131, and further improving the assembly speed of the battery device 1.

[0086] In some embodiments, the surface of the busbar component 131 facing the battery monomer 12 has a first groove 1317, and the sampling component 132 includes a first part 1321 and a second part 1322 distributed along the first direction X; the first part 1321 is connected to the second part 1322, the first part 1321 is located in the first groove 1317 and contacts the surface of the first groove 1317 facing the battery monomer 12, and the second part 1322 is located outside the first groove 1317.

[0087] The first part 1321 and the second part 1322 can be in an integrated structure. The second part 1322 can be electrically connected to the signal acquisition circuit.

[0088] In some examples, the sidewall of the first groove 1317 has no opening, that is, the first groove 1317 is surrounded by a continuous annular sidewall; the second part 1322 extends from the slot of the first groove 1317 to the surface of the busbar component 131 facing the battery monomer 12 and extends out of the busbar component 131. In other examples, the sidewall of the first groove 1317 has a first opening 1314, and the second part 1322 can extend out of the first groove 1317 through the first opening 1314 and extend out of the busbar component 131.

[0089] The first part 1321 contacts the surface of the first groove 1317 facing the battery monomer 12, which can be understood as that the maximum surface of the first part 1321 contacts the bottom surface of the first groove 1317. For example, when the sampling component 132 is a plate structure, the maximum surface of the first part 1321 is the plate surface of the plate structure; when the thickness of the plate structure is ignored or tends to zero, the plate structure can also be referred to as a sheet structure.

[0090] In some examples, the side surface of the first portion 1321 is in contact with the side surface of the first groove 1317, so that the first groove 1317 functions to limit the first portion 1321, thereby making the first portion 1321 less likely to shake within the first groove 1317, and thus enhancing the connection stability of the first portion 1321 to the busbar component 131, and thus improving the reliability of the battery device 1.

[0091] In the present embodiment, the first portion 1321 of the sampling component 132 is located within the first groove 1317, so that the first groove 1317 functions to hide the first portion 1321. The first portion 1321 is in contact with the surface of the first groove 1317 facing the battery cell 12, so that the contact area of the first portion 1321 to the first groove 1317 for electrical connection is large, thereby increasing the connection reliability of the first portion 1321 to the busbar component 131, and thus improving the reliability of the battery device 1.

[0092] In some embodiments, the first side surface 1312 of the busbar component 131 has a first opening 1314, the first opening 1314 being in communication with the first groove 1317; the first direction X is transverse to the first side surface 1312; and the second portion 1322 is located outside the busbar component 131 through the first opening 1314.

[0093] The first direction X is perpendicular to the first side surface 1312.

[0094] In the present embodiment, the first portion 1321 is located within the first groove 1317, and the second portion 1322 is located outside the first groove 1317 through the first opening 1314; this can reduce the overall thickness of the busbar component 131 and the first portion 1321 in the stacking direction, so that the distance between the busbar component 131 and the inner surface of the upper case 111 is increased, thereby reducing the risk of the busbar component 131 and the upper case 111 pressing the signal acquisition circuit located therebetween when the battery cell 12 swells, and thus improving the reliability of the battery device 1.

[0095] In some embodiments, the surface of the first portion 1321 facing the battery cell 12 is flush with the surface of the busbar component 131 facing the battery cell 12, and the surface of the first portion 1321 facing the battery cell 12 and the surface of the busbar component 131 facing the battery cell 12 are both in contact with the second clamping wall 1333.

[0096] In some examples, the surface of the first portion 1321 facing the battery cell 12 can be lower than the surface of the busbar component 131 facing the battery cell 12. In other examples, the surface of the first portion 1321 facing the battery cell 12 can be higher than the surface of the busbar component 131 facing the battery cell 12.

[0097] In the embodiment, the second clamping wall 1333 can be in contact with both the surface of the first portion 1321 facing the battery monomer 12 and the surface of the busbar component 131 facing the battery monomer 12, so that the clamping component 133 can clamp the first portion 1321 of the sampling component 132 on the busbar component 131 more firmly, thereby improving the connection reliability of the sampling component 132 and the busbar component 131, and further improving the reliability of the battery device 1.

[0098] In some embodiments, continuing to refer to Figures 4 to 7 , the connecting assembly 13 further comprises a glue portion 134; the glue portion 134 adhesively fixes the first portion 1321 and the busbar component 131.

[0099] The glue portion 134 can be a kind of glue with adhesive ability. For example, the glue portion 134 can be hot melt glue, laser glue, glue, etc.

[0100] In some examples, the second clamping wall 1333 covers the slot of the first groove 1317 to form a cavity; the glue portion 134 is filled in the cavity except the remaining part of the first portion 1321, so that the glue portion 134 adhesively fixes the slot wall of the first groove 1317, the first portion 1321 and the second clamping wall 1333 as a whole. In other examples, the glue portion 134 is located in the glue hole 1316, and the surface of the first portion 1321 away from the battery monomer 12 and the hole wall of the glue hole 1316 are adhesively fixed with the glue portion 134.

[0101] In the embodiment, the glue portion 134 can play a role in fixing the sampling component 132 and the busbar component 131 again, thereby improving the connection reliability of the sampling component 132 and the busbar component 131, and further improving the reliability of the battery device 1.

[0102] In some embodiments, the busbar component 131 has a glue hole 1316, and the glue hole 1316 extends from the surface of the busbar component 131 away from the battery monomer 12 to the first groove 1317, for example, to the bottom surface of the first groove 1317; the first portion 1321 covers the glue hole 1316; the glue portion 134 is located in the glue hole 1316, and the surface of the first portion 1321 away from the battery monomer 12 and the hole wall of the glue hole 1316 are adhesively fixed with the glue portion 134.

[0103] In some examples, the glue hole 1316 extends from the surface of the busbar component 131 away from the battery monomer 12 to the bottom surface of the first groove 1317.

[0104] In some examples, the glue hole 1316 is arranged staggered with the first clamping wall 1331. In other examples, the first clamping wall 1331 is arranged opposite to the glue portion 134, that is, the first clamping wall 1331 covers the glue hole 1316.

[0105] In some examples, the surface of the glue portion 134 away from the battery cell 12 is flush with the surface of the busbar component 131 away from the battery cell 12. In other examples, the surface of the glue portion 134 away from the battery cell 12 is lower than the surface of the busbar component 131 away from the battery cell 12. In other examples, the surface of the glue portion 134 away from the battery cell 12 is higher than the surface of the busbar component 131 away from the battery cell 12.

[0106] In the present embodiment, the glue hole 1316 extends from the surface of the busbar component 131 away from the battery cell 12 to the surface of the first recess 1317 close to the plurality of battery cells 12, so as to facilitate the installation of the glue portion 134 from the side of the busbar component 131 away from the battery cell 12, and to fix the first portion 1321 to the hole wall of the glue hole 1316.

[0107] In some embodiments, the glue portion 134 is a glue body whose adhesion can be released under certain conditions.

[0108] In some examples, the glue portion 134 is a low-temperature glue, i.e., the low-temperature glue has adhesion at low temperature (e.g., room temperature); wherein the adhesion of the low-temperature glue disappears at high temperature (e.g., 100°). In other examples, the glue portion 134 can react with a solvent to release the adhesion of the glue portion 134; for example, the glue portion 134 can be a moisture-curing glue (e.g., silicone sealant), and the solvent can be water or moisture in the air.

[0109] In the present embodiment, under normal use, the glue portion 134 can play a role of secondary fixing the sampling component 132 to the busbar component 131. Under special conditions, the adhesion of the glue portion 134 decreases, so that the first portion 1321 is separated from the hole wall of the glue hole 1316, so as to facilitate the replacement and maintenance or recycling of the busbar component 131 and / or the sampling component 132.

[0110] In some embodiments, the surface of the busbar component 131 away from the battery cell 12 has a second recess 1313; the first end surface 1311 of the busbar component 131 has a second opening 1315, the second opening 1315 communicates with the second recess 1313; the second opening 1315 is provided with the first clamping wall 1331, and the first clamping wall 1331 is located in the second recess 1313; the first end surface 1311 intersects the second direction Y, and the first direction X intersects the second direction Y.

[0111] The first end surface 1311 is perpendicular to the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0112] In some examples, the first side surface 1312 of the busbar component 131 has a third opening (not labeled in the figure), which communicates with the second recess 1313. That is, the side wall of the second recess 1313 close to the first side surface 1312 has a third opening.

[0113] In some examples, the side surface of the second groove 1313 is in contact with the side surface of the first clamping wall 1331, which functions to limit the first clamping wall 1331.

[0114] In the present embodiment, the first clamping wall 1331 is located within the second groove 1313, such that the second groove 1313 can accommodate the second clamping wall 1333, thereby reducing the overall thickness of the second clamping wall 1333 and the busbar component 131 along the stacking direction, and increasing the distance between the busbar component 131 or the second clamping wall 1333 and the inner surface of the upper case 111, thereby reducing the risk of the busbar component 131 or the second clamping wall 1333 pressing the signal acquisition circuit located therebetween when the battery cell 12 swells, and further improving the reliability of the battery device 1.

[0115] In some embodiments, the surface of the first clamping wall 1331 away from the battery cell 12 is flush with the surface of the busbar component 131 away from the battery cell 12; or, the surface of the first clamping wall 1331 away from the battery cell 12 is lower than the surface of the busbar component 131 away from the battery cell 12.

[0116] In some examples, the surface of the first clamping wall 1331 away from the battery cell 12 is higher than the surface of the busbar component 131 away from the battery cell 12.

[0117] In the present embodiment, the overall thickness of the second clamping wall 1333 and the busbar component 131 along the stacking direction is the thickness of the busbar component 131, such that the distance between the busbar component 131 and the inner surface of the upper case 111 is further increased, thereby further reducing the risk of the busbar component 131 pressing the signal acquisition circuit located therebetween when the battery cell 12 swells, and further improving the reliability of the battery device 1.

[0118] In some embodiments, referring to Figure 9 , along the first direction X, one of the side surface of the second groove 1313 and the side surface of the first clamping wall 1331 has a limiting groove 1335, and the other has a limiting portion 1334, which is clamped within the limiting groove 1335.

[0119] In some examples, the side surface of the second groove 1313 has a limiting groove 1335, and the side surface of the first clamping wall 1331 has a limiting portion 1334, which is clamped within the limiting groove 1335. In other examples, the side surface of the first clamping wall 1331 has a limiting groove 1335, and the side surface of the second groove 1313 has a limiting portion 1334, which is clamped within the limiting groove 1335.

[0120] In some examples, the limiting portion 1334 is a rigid structure, and the first clamping wall 1331 and the second clamping wall 1333 are flexible structures. In use, the first clamping wall 1331 and the second clamping wall 1333 can be spread apart in opposite directions, so that the first clamping wall 1331 is located in the second groove 1313, and the limiting portion 1334 is clamped in the limiting groove 1335. In other examples, the limiting portion 1334 is a flexible structure; when the flexible structure is in contact with the groove wall of the second groove 1313 or the side surface of the first clamping wall 1331, the limiting portion 1334 is compressed; as the limiting portion 1334 slides into the limiting groove 1335, the limiting portion 1334 releases the elasticity, so that the limiting portion 1334 is clamped in the limiting groove 1335, thereby clamping the first clamping wall 1331 in the second groove 1313. Of course, the limiting groove 1335 and the limiting portion 1334 in the present embodiment can also be other limiting structures, for example, the side surface of the first clamping wall 1331 has a receiving groove, and the limiting portion 1334 is a telescopic rod arranged in the receiving groove. As the limiting portion 1334 slides into the limiting groove 1335, the telescopic rod is elongated into the limiting groove 1335, so that the elastic block is clamped in the limiting groove 1335, thereby clamping the first clamping wall 1331 in the second groove 1313.

[0121] In the present embodiment, through the cooperation of the limiting groove and the limiting portion, the risk of the first clamping wall 1331 shaking or falling out of the second groove 1313 in the second direction Y can be reduced, so that the clamping component 133 can better clamp the current-collecting component 131 and the sampling component 132, thereby improving the reliability of the battery device 1.

[0122] In some embodiments, the current-collecting component 131 is arranged at the top and / or the bottom of the plurality of battery monomers 12; the entire sampling component 132 is located on the side of the current-collecting component 131 facing the battery monomers 12.

[0123] In some examples, the current-collecting component 131 is arranged at the top of the plurality of battery monomers 12. In other examples, the current-collecting component 131 is arranged at the bottom of the plurality of battery monomers 12. In other examples, the current-collecting component 131 is arranged at the top and the bottom of the plurality of battery monomers 12.

[0124] In some examples, the sampling component 132 is a flat plate structure. In other examples, the part of the sampling component 132 located outside the current-collecting component 131 is bent towards the side of the battery monomers 12. In other examples, the part of the sampling component 132 located outside the current-collecting component 131 can be bent away from the side of the battery monomers 12.

[0125] In the embodiment, the whole sampling component 132 is located on the side of the busbar component 131 facing the battery monomer 12, so that the distance between the part of the sampling component 132 located outside the busbar component 131 and the inner surface of the upper box body 111 is greater than the distance between the busbar component 131 and the inner surface of the upper box body 111, thereby further reducing the extrusion of the sampling component 132 and the upper box body 111 on the signal collection circuit located therebetween when the battery monomer 12 expands, and further improving the reliability of the battery device 1.

[0126] In some embodiments, the connecting assembly 13 further comprises a glue part 134; at least part of the sampling component 132 is bonded to the busbar component 131 through the glue part 134.

[0127] The glue part 134 can be a kind of glue with bonding ability, and the description of the glue part 134 can refer to the related description of the glue part 134 in the above embodiments.

[0128] In the embodiment, the glue part 134 can quickly fix and connect the sampling component 132 and the busbar component 131, thereby improving the assembly speed of the battery device 1.

[0129] Hereinafter, several embodiments of the present application are provided.

[0130] Embodiment one, see Figures 4 to 7 , the battery device 1 comprises a connecting assembly 13 and a plurality of battery monomers 12; the connecting assembly 13 is connected with the electrode terminal 123 of the plurality of battery monomers 12; the connecting assembly 13 comprises a busbar component 131 and a sampling component 132; at least part of the sampling component 132 is in contact with the surface of the busbar component 131 facing the battery monomer 12, and the sampling component 132 is electrically connected with the busbar component 131.

[0131] The busbar component 131 is arranged on the top of the plurality of battery monomers 12, and the whole sampling component 132 is located on the side of the busbar component 131 facing the battery monomer 12.

[0132] The connecting assembly 13 further comprises a clamping component 133, the clamping component 133 comprises a first clamping wall 1331, a connecting part 1332 and a second clamping wall 1333 connected in sequence; the first clamping wall 1331 and the second clamping wall 1333 are oppositely arranged along the stacking direction of the sampling component 132 and the busbar component 131; the connecting part 1332 is connected between the first clamping wall 1331 and the second clamping wall 1333, for example, the connecting part 1332 is perpendicular to the first clamping wall 1331 and the second clamping wall 1333.

[0133] The surface of the busbar component 131 facing the surface of the battery cell 12 has a first groove 1317, and the sampling component 132 includes a first portion 1321 and a second portion 1322 distributed along the first direction X; the first portion 1321 is connected to the second portion 1322, and the first portion 1321 is located in the first groove 1317 and in contact with the surface of the first groove 1317 facing the battery cell 12. The first side surface 1312 of the busbar component 131 has a first opening 1314 in communication with the first groove 1317; the first direction X intersects the first side surface 1312; the second portion 1322 passes through the first opening 1314 and is located outside the busbar component 131. The first clamping wall 1331 cooperates with the second clamping wall 1333 to clamp the first portion 1321 of the sampling component 132 in the first groove 1317. The surface of the first portion 1321 facing the battery cell 12 is flush with the surface of the busbar component 131 facing the battery cell 12, and both the surface of the first portion 1321 facing the battery cell 12 and the surface of the busbar component 131 facing the battery cell 12 are in contact with the second clamping wall 1333.

[0134] The connecting assembly 13 further includes a glue portion 134; the busbar component 131 has a glue hole 1316 extending from the surface of the busbar component 131 away from the battery cell 12 to the surface of the first groove 1317 close to the plurality of battery cells 12; the first portion 1321 covers the glue hole 1316; the glue portion 134 is located in the glue hole 1316, and the surface of the first portion 1321 away from the battery cell 12 and the hole wall of the glue hole 1316 are both bonded and fixed with the glue portion 134. The glue portion 134 is a glue body whose adhesion can be released under certain conditions.

[0135] The surface of the busbar component 131 away from the battery cell 12 has a second groove 1313; the first end surface 1311 of the busbar component 131 has a second opening 1315 in communication with the second groove 1313; the first clamping wall 1331 passes through the second opening 1315 and is located in the second groove 1313; the first end surface 1311 intersects the second direction Y, and the first direction X intersects the second direction Y. The surface of the first clamping wall 1331 away from the battery cell 12 is flush with the surface of the busbar component 131 away from the battery cell 12.

[0136] In the second embodiment, the battery device 1 includes the connecting assembly 13 and the plurality of battery cells 12; the connecting assembly 13 is connected to the electrode terminal 123 of the plurality of battery cells 12; the connecting assembly 13 includes the busbar component 131 and the sampling component 132; at least part of the sampling component 132 is in contact with the surface of the busbar component 131 facing the battery cell 12, and the sampling component 132 is electrically connected to the busbar component 131.

[0137] The busbar component 131 is arranged on the top of the plurality of battery cells 12, and the entire sampling component 132 is located on the side of the busbar component 131 facing the battery cells 12.

[0138] The surface of the busbar component 131 facing the battery cells 12 has a first groove 1317, and the sampling component 132 includes a first portion 1321 and a second portion 1322 distributed along a first direction X; the first portion 1321 is connected to the second portion 1322, and the first portion 1321 is located in the first groove 1317 and in contact with the surface of the first groove 1317 facing the battery cells 12. The first side surface 1312 of the busbar component 131 has a first opening 1314, and the first opening 1314 is in communication with the first groove 1317; the first direction X intersects the first side surface 1312; the second portion 1322 passes through the first opening 1314 and is located outside the busbar component 131. The surface of the first portion 1321 facing the battery cells 12 is flush with the surface of the busbar component 131 facing the battery cells 12.

[0139] The connecting assembly 13 further includes a glue portion 134; the busbar component 131 has a glue hole 1316 extending from the surface of the busbar component 131 away from the battery cells 12 to the surface of the first groove 1317 close to the plurality of battery cells 12; the first portion 1321 covers the glue hole 1316; the glue portion 134 is located in the glue hole 1316, and the surface of the first portion 1321 away from the battery cells 12 and the hole wall of the glue hole 1316 are both bonded and fixed with the glue portion 134. The glue portion 134 is a glue body whose adhesion can be released under certain conditions.

[0140] The above description is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a plurality of battery cells; a connecting assembly comprising a busbar component and a sampling component; the busbar component is connected with electrode terminals of the plurality of battery cells; at least a part of the sampling component is in contact with a surface of the busbar component facing the battery cells, and the sampling component is electrically connected with the busbar component.

2. The battery device according to claim 1, wherein the connecting assembly further comprises a clamping component, the clamping component clamping at least a part of the sampling component on the surface of the busbar component facing the battery cells.

3. The battery device according to claim 2, wherein the clamping component comprises a first clamping wall, a connecting portion and a second clamping wall connected in sequence; the first clamping wall is oppositely arranged with the second clamping wall along a stacking direction of the sampling component and the busbar component, and the connecting portion is connected between the first clamping wall and the second clamping wall; the first clamping wall and the second clamping wall cooperate to clamp at least a part of the sampling component on the surface of the busbar component facing the battery cells.

4. The battery device according to claim 3, wherein the surface of the busbar component facing the battery cells has a first groove, and the sampling component comprises a first part and a second part distributed along a first direction; the first part is connected with the second part, the first part is located in the first groove and is in contact with the surface of the first groove facing the battery cells, and the second part is located outside the first groove.

5. The battery device according to claim 4, wherein a first opening is formed on a first side surface of the busbar component, the first opening is in communication with the first groove; the first direction intersects with the first side surface; and the second part passes through the first opening and is located outside the busbar component.

6. The battery device according to claim 5, wherein the surface of the first part facing the battery cells is flush with the surface of the busbar component facing the battery cells, and the surface of the first part facing the battery cells and the surface of the busbar component facing the battery cells are both in contact with the second clamping wall.

7. The battery device according to claim 4, wherein the connecting assembly further comprises a glue portion; and the glue portion adhesively fixes the first part and the busbar component.

8. The battery device according to claim 7, wherein the busbar component has a glue hole extending from a surface of the busbar component away from the battery cells into the first groove; the first part covers the glue hole; the glue portion is located in the glue hole, and the surface of the first part away from the battery cells and a hole wall of the glue hole are both adhesively fixed with the glue portion.

9. The battery device according to claim 7, wherein the glue portion is a glue body whose adhesiveness can be released under certain conditions.

10. The battery device according to claim 4, wherein The surface of the busbar component away from the battery cell has a second groove; the first end surface of the busbar component has a second opening, which is in communication with the second groove; the second opening is for the first clamping wall to pass through, and the first clamping wall is located in the second groove; the first end surface is transverse to the second direction, and the first direction is transverse to the second direction.

11. The battery device according to claim 10, wherein, the surface of the first clamping wall away from the battery cell is flush with the surface of the busbar component away from the battery cell; or, the surface of the first clamping wall away from the battery cell is lower than the surface of the busbar component away from the battery cell.

12. The battery device according to claim 10, wherein, in the first direction, one of the side surface of the second groove and the side surface of the first clamping wall has a limiting groove, and the other has a limiting part, which is clamped in the limiting groove.

13. The battery device according to any one of claims 1-12, wherein, the busbar component is arranged at the top and / or bottom of the plurality of battery cells; the entire sampling component is located on the side of the busbar component facing the battery cells.

14. The battery device according to any one of claims 1-6, 10 and 11, wherein, the connecting assembly further comprises a glue part; at least part of the sampling component is bonded to the busbar component through the glue part.

15. An electrical device, characterized by including: a device body and the battery device according to any one of claims 1-14, which is arranged on the device body.

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