Battery device and electric equipment

Abstract

The invention relates to the technical field of batteries, and provides a battery device and electric equipment. A signal acquisition part is electrically connected with an FPC body; the signal acquisition part comprises a first transmission end arranged on the first battery monomer, a second transmission end arranged on the second battery monomer and a weakening connection part used for disconnecting electric connection between the first transmission end and the second transmission end; wherein the first battery monomer and the second battery monomer are oppositely arranged in a first direction, the first transmission end and the second transmission end are opposite in the first direction, and the weakening connection part is suitable for expanding when the first battery monomer and the second battery monomer appear; and when the displacement generated in the first direction exceeds a displacement threshold value, the first transmission end is broken and the first transmission end and the second transmission end are disconnected. Therefore, expansion early warning can be realized, the safety of the battery device can be improved, potential safety hazards can be reduced, early warning can be performed in advance, breakage of the FPC main body can be avoided, and the maintenance cost can be reduced only by replacing the signal acquisition part.

Description

TECHNICAL FIELD

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

[0002] In the related art, the FPC (English name: Flexible Printed Circuit, Chinese name: Flexible Printed Circuit Board) assembly is used for signal transmission, data acquisition and power distribution. Although the flexibility of the FPC assembly itself can disperse the stress generated by the volume change of the battery monomer during charging and discharging, prevent stress concentration in a certain area, and reduce the pressure on the battery monomer and other internal components, the FPC assembly cannot provide early warning for the expansion of the battery monomer, and can only be broken and fail as a whole when the expansion force is too large. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery device and an electric equipment, and the FPC assembly can realize the expansion early warning of the battery device, so as to improve the safety and reliability of the battery device and reduce the safety hazard.

[0004] In a first aspect, the present application provides a battery device, the battery device comprising: a battery monomer assembly and an FPC assembly, the FPC assembly comprising: an FPC body and a signal acquisition part, the signal acquisition part being electrically connected with the FPC body, the signal acquisition part comprising a first transmission end arranged at a first battery monomer, a second transmission end arranged at a second battery monomer, and a weakened connection part for disconnecting the electrical connection between the first transmission end and the second transmission end; wherein the first battery monomer and the second battery monomer are arranged opposite to each other in a first direction, the first transmission end and the second transmission end are opposite to each other in the first direction, and the weakened connection part is adapted to be broken and disconnect the first transmission end and the second transmission end when the displacement of the first battery monomer and the second battery monomer in the first direction caused by the expansion exceeds a displacement threshold value, one of the two battery monomers adjacent in the first direction is defined as the first battery monomer, and the other is defined as the second battery monomer.

[0005] According to the battery device of the present application, the weakened connection part is arranged in the signal acquisition part, the signal transmission loop can be disconnected through the weakened connection part to issue a warning that the expansion force exceeds the safety threshold, the expansion early warning can be realized, the safety of the battery device can be improved, and the safety hazard can be reduced. Not only can the function of the FPC assembly be enriched to reduce the safety hazard of the battery device, but also the early warning can avoid the breakage of the FPC body, and only the signal acquisition part needs to be replaced during subsequent maintenance, which can also reduce the maintenance cost.

[0006] According to some embodiments of the present application, the signal collection part comprises a substrate and a wire arranged on the substrate, the wire is electrically connected with the FPC body, the substrate defines a weakened connection part, the wire is stacked on the weakened connection part and is adapted to be broken synchronously with the weakened connection part.

[0007] In the above technical solution, under the premise of realizing the inflation early warning, the weakened connection part is formed on the substrate instead of arranging the weakened connection part on the wire, and the reliability and stability of the signal transmission loop or the signal collection loop where the wire is located can be ensured, so as to improve the reliability and stability of the FPC assembly.

[0008] According to some embodiments of the present application, the substrate comprises a first plate segment covering the first battery monomer, a second plate segment covering the second battery monomer, and a connecting plate segment between the first plate segment and the second plate segment, and a hollow part is arranged on the connecting plate segment to define a weakened connection part.

[0009] In the above technical solution, by arranging the hollow part on the connecting plate segment and forming the weakened connection part, the weakened connection part can be formed by a simple structure, the substrate structure can be simplified, the material cost can be reduced, and the reliability of the preferential breaking of the weakened connection part can be improved.

[0010] According to some embodiments of the present application, the wire comprises a first wire segment, a second wire segment, and a connecting segment, one end of the first wire segment is electrically connected with the FPC body, the other end extends to the first plate segment and forms a first transmission end, one end of the second wire segment is electrically connected with the FPC body, the other end extends to the second plate segment and forms a second transmission end, and the connecting segment is stacked on the weakened connection part and connected with the first transmission end at one end and connected with the second transmission end at the other end.

[0011] In the above technical solution, the first wire segment, the connecting segment, and the second wire segment form a complete signal transmission loop or signal collection loop, and the connecting segment is stacked on the weakened connection part so that it can be broken synchronously with the weakened connection part, and the reliability and stability of the inflation early warning of the signal collection part can be improved.

[0012] According to some embodiments of the present application, the width of the weakened connection part is greater than or equal to the wire diameter.

[0013] In the above technical solution, the width of the weakened connection part is greater than or equal to the wire diameter, which can make the synchronous breaking effect of the weakened connection part and the connecting segment better, can reduce the probability that the weakened connection part is not broken and the connecting segment is broken first, and thus the inflation early warning reliability and stability of the signal collection part can be improved.

[0014] According to some embodiments of the present application, the battery monomer assembly further comprises: a busbar, the busbar comprises a first connecting end and a second connecting end, the first connecting end is electrically connected with the first battery monomer, the second connecting end is electrically connected with the second battery monomer, the first transmission end is located at the first connecting end, and the second transmission end is located at the second connecting end.

[0015] In the above technical solution, on the one hand, the signal acquisition part can be arranged on the busbar to facilitate signal acquisition of the signal acquisition part, and on the other hand, the first connecting end and the second connecting end of the busbar are fixed on the pole of the first battery monomer and the second battery monomer respectively to move synchronously with the first battery monomer and the second battery monomer respectively, which can drive the first transmission end and the second transmission end to move respectively, and the expansion early warning of the signal acquisition part can be linked with the movement of the busbar, so that the reliability and stability are higher.

[0016] According to some embodiments of the present application, the busbar further comprises: a connecting part connecting the first connecting end and the second connecting end, the connecting part is located between the first connecting end and the second connecting end, and the weakened connecting part is stacked on the connecting part.

[0017] In the above technical solution, the connecting part is arranged in an arc relative to the surface of the busbar defined by the first connecting end and the second connecting end, such as being recessed towards the battery monomer or being recessed away from the battery monomer, and the recessed part of the connecting part can gradually move towards the surface of the busbar when the battery monomer expands to absorb the expansion amount and avoid the rupture of the busbar, and the weakened connecting part is directly stacked on the connecting part, so that the reliability of the weakened connecting part to break first is higher, and the stability and reliability of the expansion early warning are higher.

[0018] According to some embodiments of the present application, the connecting part comprises: a normal connecting segment and a weakened connecting segment, the weakened connecting part is stacked on the weakened connecting segment and is adapted to break when the weakened connecting segment breaks.

[0019] In the above technical solution, the weakened connecting segment of the busbar can break before the normal connecting segment, and when the weakened connecting segment breaks, the weakened connecting part is synchronously broken to realize the linkage expansion early warning of the busbar and the signal acquisition part.

[0020] According to some embodiments of the present application, the connecting part comprises a plurality of arc connecting segments, at least one arc connecting segment is provided with a notch to form a weakened connecting segment, and the weakened connecting part is arranged on one side of the notch.

[0021] According to some embodiments of the present application, the first connecting end and the second connecting end define a surface of the busbar, the connecting part comprises a plurality of arc connecting segments, the arc connecting segment with a smaller arc curvature relative to the surface of the busbar than other arc connecting segments is formed as a weakened connecting segment.

[0022] In the above technical solution, the different degrees of curvature of the arch can be designed at the middle connection position of the busbar, and the weakened connection parts on the FPC assembly are connected together, when the expansion safety is about to fail, the weakened connection part with low curvature is disconnected or the weakened connection part with notches is disconnected, and the weakened connection part of the FPC assembly and the connection part of the wire are disconnected at the same time, at this time, the electrical signal of the FPC assembly will change immediately, the battery management system will collect the signal change, identify the fracture abnormality and fracture position, and can immediately issue an expansion force warning.

[0023] In a second aspect, the application provides a power consumption device, comprising the battery device in the above embodiments.

[0024] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein: Figure 1 is a schematic diagram of a power consumption device according to an embodiment of the application; Figure 2 is a schematic diagram of a battery device according to an embodiment of the application; Figure 3 is a schematic diagram of the cooperation of a battery cell and an FPC assembly according to an embodiment of the application; Figure 4 is a schematic diagram of the cooperation of an FPC assembly and a busbar according to an embodiment of the application; Figure 5 is a schematic diagram of a signal collection part according to an embodiment of the application.

[0026] Reference signs: FPC assembly 100, FPC body 10, signal collection part 20, substrate 21, first plate segment 211, second plate segment 212, connecting plate segment 213, hollow part 214, weakened connection part 215, wire 22, first wire segment 221, second wire segment 222, connection segment 223, first transmission end 224, second transmission end 225, current sensor 226, battery device 200, battery cell assembly 300, first battery cell 301, second battery cell 302, busbar 303, first connection end 3031, second connection end 3032, connection part 3033, conventional connection segment 30331, weakened connection segment 30332, The electric device 400, the controller 500, the motor 600, the box 700, The first direction X. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the description of the present application and the claims and the above description of drawings are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the description of the present application and the claims or the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0029] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents a "or" relationship between the associated objects before and after it.

[0032] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In the description of the present application, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0035] In the description of the present application, the first feature "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature.

[0036] "Multiple" appearing in the present application means two or more (including two).

[0037] At present, the application of battery devices is more and more extensive, and battery devices are not only applied to energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles and electric vehicles, and many fields such as military equipment, aerospace. With the continuous expansion of the field of battery pain, its market demand is also increasing.

[0038] The battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0039] The battery cell can be 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. The present application is not limited thereto.

[0040] The battery device mentioned in the embodiments of the present application refers to a single physical module comprising one or more battery monomers to provide higher voltage and capacity. When there are multiple battery monomers, the multiple battery monomers are connected in series, in parallel or in a mixed manner through bus components (such as busbars).

[0041] In some embodiments, the multiple battery monomers can constitute a battery unit, that is, when there are multiple battery monomers, the multiple battery monomers are arranged and fixed to form a battery unit.

[0042] In some embodiments, the battery device comprises a box body and battery monomers, at least one battery monomer or at least one battery unit is accommodated in the box body, the box body has a containing space, and the at least one battery monomer or the at least one battery unit is accommodated in the containing space.

[0043] In some embodiments, the battery device or the battery unit can be part of an energy storage system. The energy storage system can be an energy storage container, an energy storage cabinet, etc., which integrates a battery and an energy shutdown module.

[0044] The development of battery technology needs to consider various design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge / discharge rate. In addition, the safety performance of the battery also needs to be considered.

[0045] The technical solutions described in the embodiments of the present application are applicable to battery devices and power consumption equipment using battery devices.

[0046] The power consumption equipment can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and 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, such as 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, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not specially limit the above power consumption equipment.

[0047] The following embodiments are described for convenience of illustration, taking the power consumption equipment as an example for illustration.

[0048] Please refer to Figure 1 , Figure 1A structural schematic diagram of the power utilization device 400 is provided for some embodiments of the present application. The vehicle is internally provided with the battery device 200, which can be arranged at the bottom, head or tail of the vehicle. The battery device 200 can be used for power supply of the vehicle, for example, the battery can be used as the operating power supply of the vehicle.

[0049] The vehicle can further include a controller 500 and a motor 600, the controller 500 being used to control the battery device 200 to supply power to the motor 600, and the motor 600 being formed as a load, for example, for the working power demand of the vehicle during starting, navigation and driving.

[0050] In some embodiments of the present application, the battery device 200 can not only be used as the operating power supply of the vehicle, but also be used as the driving power supply of the vehicle, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle.

[0051] Please refer to Figure 2 , Figure 2 A schematic diagram of the box 700 is provided for some embodiments of the present application. The battery device 200 includes the battery monomer assembly 300 and the box 700, the box 700 being used to accommodate the battery monomer assembly 300, and the battery monomer assembly 300 can include at least one battery monomer column, each battery monomer column including at least two battery monomers.

[0052] As an example, the battery monomer can be a cylindrical battery monomer, a prismatic battery monomer or a battery monomer of other shapes, which is not particularly limited in the present application.

[0053] In the battery device 200, the battery monomer can be one or multiple. If the battery monomer is multiple, the multiple battery monomers can be connected in series, in parallel or in a mixed manner, and the mixed manner means that the multiple battery monomers are connected in series and in parallel. The multiple battery monomers can be connected in series, in parallel or in a mixed manner to form a battery unit, and the multiple battery units can be connected in series, in parallel or in a mixed manner to form an integral whole and be accommodated in the box 700.

[0054] As shown in Figure 3 , the battery device 200 is internally provided with the FPC assembly 100, and the main role of the FPC assembly 100 in the battery device 200 is to connect the sensors, battery monomers and control units in the battery management system (BMS), so as to realize signal transmission, power distribution and data acquisition. The lightweight and flexible design of the FPC can adapt to complex geometric structures in the limited internal space of the battery, while reducing the overall weight.

[0055] The signal transmission refers to transmitting real-time data such as voltage, temperature and current of the battery monomer, so that the battery management system can accurately monitor the state of the battery monomer, the power distribution refers to stably supplying power for the sensor and other electronic components, and the data acquisition refers to connecting a plurality of battery monomers and sensors and transmitting data to the battery management system in a centralized manner, so as to realize accurate management of the battery device 200.

[0056] In the prior art, although the FPC assembly 100 can realize the above functions, and the flexibility of the FPC assembly 100 can disperse the stress generated by the volume change of the battery monomer during the charging and discharging process, and improve stress concentration, but the FPC assembly 100 cannot give a warning for the expansion of the battery monomer, and when the expansion force is too large, the FPC assembly 100 will be broken as a whole and cannot give a warning for the expansion failure, and will also increase the maintenance cost.

[0057] Therefore, the FPC assembly 100 provided by the embodiments of the present application can break the signal acquisition part 20 when the expansion displacement of the battery monomer reaches the displacement threshold, so as to generate a warning signal, realize early warning for the expansion failure, improve the safety and reliability of the battery device 200, and reduce the safety hazard.

[0058] The FPC assembly 100, the battery device 200 and the power utilization equipment 400 according to the embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1-5 The FPC assembly 100, the battery device 200 and the power utilization equipment 400 according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0059] In combination with FIGS. 1 to 4, Figure 2 and Figure 3 The present application provides a battery device 200, which comprises a battery monomer assembly 300 and an FPC assembly 100, the battery monomer assembly 300 comprises at least one battery monomer column, the battery monomer column comprises at least two battery monomers arranged in sequence along a first direction, one of the two adjacent battery monomers in the first direction is defined as a first battery monomer 301, and the other is defined as a second battery monomer 302.

[0060] Specifically, the former one of the two adjacent battery monomers in the first direction in the battery monomer column is the first battery monomer 301, and the latter one is the second battery monomer 302, the first transmission end 224 is located on the first battery monomer 301, the second transmission end 225 is located on the second battery monomer 302, the connecting segment 223 connects the first transmission end 224 and the second transmission end 225, and the connecting segment 223 can be broken synchronously with the weakening of the connecting part 215, so as to realize the expansion warning.

[0061] As Figure 3 , Figure 4 and Figure 5As shown, the FPC assembly 100 comprises an FPC body 10 and a plurality of signal acquisition units 20, each of which is arranged corresponding to an adjacent pair of battery cells and used for collecting real-time data (such as voltage signal, current signal and temperature signal, etc.) of one of the battery cells.

[0062] The signal acquisition unit 20 is electrically connected with the FPC body 10, so that the real-time data of the battery cells can be transmitted to the FPC body 10 and further transmitted to the battery management system through the FPC body 10.

[0063] Specifically, the signal acquisition unit 20 comprises a first transmission end 224 arranged on the first battery cell 301, a second transmission end 225 arranged on the second battery cell 302, and a weakened connection portion 215 used for disconnecting the electrical connection between the first transmission end 224 and the second transmission end 225, the first transmission end 224 is electrically connected with the second transmission end 225, the first battery cell 301 and the second battery cell 302 are oppositely arranged in a first direction, the first transmission end 224 and the second transmission end 225 are oppositely arranged in the first direction, and the weakened connection portion 215 is adapted to be broken and disconnect the first transmission end 224 and the second transmission end 225 when the first battery cell 301 and the second battery cell 302 appear swelling and the displacement generated in the first direction exceeds a displacement threshold.

[0064] It should be pointed out that the electrical connection of the first transmission end 224 and the second transmission end 225, so that the signal transmission loop can be formed inside the signal acquisition part 20 or formed as a signal acquisition loop, and signal transmission such as voltage signal, current signal, temperature signal, etc. can be carried out through the signal transmission loop. When the first battery monomer 301 and the second battery monomer 302 are in the charging and discharging process, the first battery monomer 301 and the second battery monomer 302 will expand and change in volume, causing the size of the first battery monomer 301 and the second battery monomer 302 to rise in the first direction, and pulling the signal acquisition part 20, so that the first transmission end 224 and the second transmission end 225 are relatively connected in the first direction, and the flexibility of the weakened connection part 215 is less than that of other areas of the signal acquisition part 20, so that when the displacement of the weakened connection part 215 in the first direction pulled by the expansion force of the first battery monomer 301 and the second battery monomer 302 exceeds the displacement threshold, the weakened connection part 215 breaks, and the electrical connection between the first transmission end 224 and the second transmission end 225 is disconnected at the same time, thereby interrupting the signal transmission loop inside the signal acquisition part 20 or disconnecting the signal acquisition loop. The corresponding battery management system cannot obtain the signal transmitted by the corresponding signal transmission loop, and can be further calibrated in the battery management system. When the signal transmission loop between the battery monomers is interrupted, the expansion force of the battery monomer will exceed the safety threshold of the expansion change amount, so as to realize the expansion warning of the battery monomer.

[0065] That is, the displacement threshold at which the weakened connection part 215 in the application breaks should be less than the safety threshold of the expansion change amount of the first battery monomer 301 and the second battery monomer 302 in the first direction caused by the expansion force of the battery monomer.

[0066] Among them, the loop formed after the electrical connection of the first transmission end 224 and the second transmission end 225 can be a signal acquisition loop, when the signal acquisition loop is disconnected, the corresponding signal cannot be acquired, the loop formed after the electrical connection of the first transmission end 224 and the second transmission end 225 can also be a signal transmission loop, when the signal transmission loop is disconnected, the corresponding signal cannot be transmitted, both of which can make the battery management system unable to obtain the corresponding signal, so as to form an expansion warning mechanism.

[0067] It can be understood that through the setting of the weakened connection part 215 in the signal acquisition part 20, the FPC assembly 100 can realize the integrated expansion warning function, so as to enrich the function of the FPC assembly 100, and at the same time, the expansion warning can be carried out in time, the mechanism of early warning can not only reduce the safety hazard of the battery device 200, but also avoid the fracture of the FPC body 10, and can also reduce the maintenance cost.

[0068] According to the battery device 200 provided by the embodiment of the present application, by arranging the weakened connection part 215 in the signal collection part 20, the signal transmission loop can be disconnected through the weakened connection part 215 to give a warning that the expansion force exceeds the safety threshold, the expansion warning can be realized, the safety of the battery device 200 can be improved, the security risks can be reduced, the function of the FPC assembly 100 can be enriched to reduce the security risks of the battery device 200, and the early warning can avoid the FPC body from being broken, and only the signal collection part 20 needs to be replaced during subsequent maintenance, and the maintenance cost can be reduced.

[0069] As shown in Figure 5 According to some embodiments of the present application, the signal collection part 20 includes a substrate 21 and a wire 22 arranged on the substrate 21, the wire 22 is electrically connected with the FPC body 10, the substrate 21 defines the weakened connection part 215, and the wire 22 is stacked on the weakened connection part 215 and is adapted to be broken synchronously with the weakened connection part 215.

[0070] The substrate 21 can provide support for the wire 22 and has a certain flexibility to allow bending and folding and can realize insulation between lines. The substrate 21 can be made of polytetrafluoroethylene, polyether ether ketone, polyimide, etc. The wire 22 can be fixed on the substrate 21 by an adhesive. The wire 22 is connected with the FPC body 10. The substrate 21 can be provided with a plurality of wires 22, some of which are used for power supply of sensors (such as temperature sensors), some of which are used for collection of voltage signals, current signals, etc., and some of which are used for signal transmission. That is, at least one wire 22 on the substrate 21 can form a signal transmission loop, and at least one wire 22 can form a signal collection loop. The weakened connection part 215 is arranged on the substrate 21, and at least part of the wire 22 used for forming the signal transmission loop or the signal collection loop is stacked on the weakened connection part 215, so that when the weakened connection part 215 is broken, the wire 22 located on the weakened connection part 215 is broken synchronously to realize the expansion warning.

[0071] In this way, under the premise of realizing the expansion warning, the weakened connection part 215 is arranged on the substrate 21 instead of the wire 22, which can also ensure the reliability and stability of the signal transmission loop or the signal collection loop in which the wire 22 is located, thereby improving the reliability and stability of the FPC assembly 100.

[0072] In combination with Figure 3 and Figure 5As shown, according to some embodiments of this application, the substrate 21 includes: a first plate segment 211 covering the first battery cell 301, a second plate segment 212 covering the second battery cell 302, and a connecting plate segment 213. The connecting plate segment 213 is located between the first plate segment 211 and the second plate segment 212, and a hollow portion 214 is provided on the connecting plate segment 213 to define a weakened connection portion 215.

[0073] In other words, the connecting plate segment 213 is used to connect the first plate segment 211 and the second plate segment 212, and a hollow portion 214 can be provided on the connecting plate segment 213 so that at least a part of the connecting plate segment 213 can be formed as a weakened connection portion 215. The width of the weakened connection portion 215 is smaller than the width of the other parts of the connecting plate segment 213 so that the weakened connection portion 215 can break first, so that when the weakened connection portion 215 breaks, the wire 22 located thereon breaks simultaneously.

[0074] In this way, by providing a hollow portion 214 on the connecting plate segment 213 and thereby forming a weakened connecting portion 215, the weakened connecting portion 215 can be formed with a simple structure, which can simplify the structure of the substrate 21, reduce material costs, and improve the reliability of the weakened connecting portion 215 in preventing preferential breakage.

[0075] like Figure 5 As shown, according to some embodiments of this application, the conductor 22 includes: a first conductor segment 221, a second conductor segment 222, and a connecting segment 223. One end of the first conductor segment 221 is electrically connected to the FPC body 10, and the other end extends to the first board segment 211 and forms a first transmission end 224. One end of the second conductor segment 222 is electrically connected to the FPC body 10, and the other end extends to the second board segment 212 and forms a second transmission end 225. The connecting segment 223 is stacked on the weakened connection portion 215, and one end is connected to the first transmission end 224, and the other end is connected to the second transmission end 225.

[0076] Specifically, the first conductor segment 221, the connecting segment 223, and the second conductor segment 222 form a complete signal transmission circuit or signal acquisition circuit. The connecting segment 223 is stacked on the weakening connection part 215 so that it can simultaneously weaken the breakage of the connection part 215, thereby improving the reliability and stability of the expansion warning of the signal acquisition part 20.

[0077] It should be noted that in some embodiments, the wire diameter of the connecting segment 223 may be smaller than that of the first conductor segment 221 and the second conductor segment 222, or the connecting segment 223 may be made of a different material with less toughness than the first conductor segment 221 and the second conductor segment 222.

[0078] According to some embodiments of this application, the width of the weakened connection portion 215 is greater than or equal to the wire diameter of the conductor 22.

[0079] wherein the wire diameter of the wire 22 refers to the diameter of the wire 22 when the cross-sectional shape of the wire 22 is circular, and refers to the maximum width dimension of the cross-sectional profile of the wire 22 when the cross-sectional shape of the wire 22 is other than circular.

[0080] Further, as shown in Figure 5 According to the present application, the width of the weakened connection portion 215 is greater than or equal to the wire diameter of the wire 22, which can make the synchronous breaking effect of the weakened connection portion 215 and the connection section 223 better, and can reduce the probability that the weakened connection portion 215 does not break while the connection section 223 breaks first, thereby improving the expansion early warning reliability and stability of the signal acquisition portion 20.

[0081] As shown in Figure 3 and Figure 4 According to some embodiments of the present application, the battery monomer assembly 300 further comprises a busbar 303, the busbar 303 comprises a first connection end 3031 and a second connection end 3032, the first connection end 3031 is electrically connected with the first battery monomer 301, the second connection end 3032 is electrically connected with the second battery monomer 302, the first transmission end 224 is located on the first connection end 3031, and the second transmission end 225 is located on the second connection end 3032.

[0082] Specifically, the busbar 303 is used to realize the electrical connection of the first battery monomer 301 and the second battery monomer 302, the first connection end 3031 and the second connection end 3032 are oppositely arranged, and the first transmission end 224 and the first plate section 211 are arranged on the first connection end 3031, and the second plate section 212 and the second transmission end 225 are arranged on the second connection end 3032, so that when the first battery monomer 301 and the second battery monomer 302 expand, the first connection end 3031 can drive the first transmission end 224 and the first plate section 211 to move, and the second connection end 3032 can drive the second transmission end 225 and the second plate section 212 to move, so as to pull the weakened connection portion 215 and the connection section 223, so that the connection section 223 breaks, thereby realizing the expansion early warning.

[0083] In this way, on the one hand, the signal acquisition portion 20 can be arranged on the busbar 303 to facilitate signal acquisition of the signal acquisition portion 20, and on the other hand, the first connection end 3031 and the second connection end 3032 of the busbar 303 are respectively fixed on the pole of the first battery monomer 301 and the second battery monomer 302 to respectively move synchronously with the first battery monomer 301 and the second battery monomer 302, which can respectively drive the first transmission end 224 and the second transmission end 225 to move, and the expansion early warning of the signal acquisition portion 20 can be linked with the movement of the busbar 303, and the reliability and stability are both higher.

[0084] According to some embodiments of this application, the busbar 303 further includes a connecting portion 3033 that connects the first connecting end 3031 and the second connecting end 3032, the connecting portion 3033 being located between the first connecting end 3031 and the second connecting end 3032, and a weakening connecting portion 215 being stacked on the connecting portion 3033.

[0085] It is understandable that the connecting portion 3033 is arc-shaped relative to the first connecting end 3031 and the second connecting end 3032, defining the busbar surface. For example, it may be an arc-shaped indentation facing the battery cell or an arc-shaped indentation away from the battery cell. The size of the indented portion of the connecting portion 3033 can gradually move towards the busbar surface when the battery cell expands, so as to absorb the expansion amount and prevent the busbar 303 from breaking. The weakened connecting portion 215 is directly stacked on the connecting portion 3033, which can make the reliability of the weakened connecting portion 215 breaking first more reliable, and the stability and reliability of the expansion warning more reliable.

[0086] like Figure 4 As shown, according to some embodiments of this application, the connecting portion 3033 includes: a conventional connecting segment 30331 and a weakened connecting segment 30332, the weakened connecting portion 215 is stacked with the weakened connecting segment 30332, and is adapted to break when the weakened connecting segment 30332 breaks.

[0087] Therefore, the weakened connecting section 30332 of the busbar 303 can break before the conventional connecting section 30331, and when the weakened connecting section 30332 breaks, it will simultaneously drive the weakened connecting part 215 to break, so as to realize the linkage expansion warning between the busbar 303 and the signal acquisition unit 20.

[0088] Understandably, the linkage expansion warning between busbar 303 and signal acquisition unit 20 can provide an early warning when expansion is about to fail safely. At this time, the conventional connection section 30331 has not broken, which can not only prevent the busbar 303 or signal acquisition unit 20 from breaking as a whole when the expansion exceeds the safety threshold.

[0089] In some embodiments, the connecting portion 3033 includes a plurality of arc-shaped connecting segments, and at least one arc-shaped connecting segment is provided with a groove to form a weakened connecting segment 30332, and the weakened connecting portion 215 is disposed on one side of the groove.

[0090] Of course, the structure of the connecting portion 3033 in this embodiment is not limited to this. In other embodiments, the first connecting end 3031 and the second connecting end 3032 define the busbar surface. The connecting portion 3033 includes a plurality of arc-shaped connecting segments. At least one arc-shaped connecting segment has a curvature relative to the busbar surface that is less than the curvature of other arc-shaped connecting segments. The arc-shaped connecting segment with a curvature less than that of other arc-shaped connecting segments is formed as a weakened connecting segment 30332.

[0091] In this way, by adopting different degrees of curvature in the middle connection position of the busbar 303 and combining the weakened connection part 215 on the FPC assembly 100, when the expansion safety is about to fail, the weakened connection section 30332 with low curvature is disconnected or the weakened connection section 30332 provided with a notch is disconnected, and the weakened connection part 215 of the FPC assembly 100 and the connection section 223 of the wire 22 are disconnected at the same time, at this time, the electrical signal of the FPC assembly 100 will immediately change, the battery management system will collect the signal change, identify the fracture abnormality and fracture position, and can immediately issue an expansion force warning.

[0092] It should be pointed out that the busbar 303 can be a single-layer busbar, the connection part 3033 is arranged between the first connection end 3031 and the second connection end 3032, the connection part 3033 includes the weakened connection section 30332 located on the width center line of the busbar 303 and the two normal connection sections 30331 located on both sides of the weakened connection section 30332, and the busbar 303 can also be a multi-layer busbar, which is constructed as a structure of stacked multi-layer plates, each plate includes the first connection end 3031, the second connection end 3032 and the connection part 3033, and the connection part 3033 of at least one plate includes the weakened connection section 30332 located on the width center line of the busbar 303 and the two normal connection sections 30331 located on both sides of the weakened connection section 30332.

[0093] It can be understood that the signal acquisition part 20 of the embodiment of the application cooperates with the busbar 303 to issue an expansion warning in advance before the battery monomer expansion exceeds the safety threshold, and for different specifications of the battery monomer, the width of the weakened connection part 215 and the width of the weakened connection section 30332 can be adjusted to match the expansion warning requirements of different specifications of the battery monomer.

[0094] Exemplarily, the signal acquisition part 20 is used to collect the current signal, the wire 22 is provided with a current sensor 226, the current sensor 226 can be arranged on the first wire section 221 or the second wire section 222, the first wire section 221 and the second wire section 222 are connected through the connection section 223 to form a signal acquisition loop, the current signal collected by the current sensor 226 can be transmitted to the battery management system, and when the weakened connection section 30332 is broken, the weakened connection part 215 and the connection section 223 are broken, the signal acquisition loop is disconnected, and the current sensor 226 cannot collect the current signal, the battery management system can identify the abnormal position of the FPC assembly 100 based on the position of the current sensor 226 which does not collect the current signal, and can issue an expansion warning in advance.

[0095] The application provides a kind of electric equipment 400, comprising: the battery device 200 in the above embodiment, the technical effect with the battery device 200 is consistent, and here is not described again.

[0096] Other configurations and operations of the FPC assembly 100, the battery device 200 and the electric equipment 400 according to the embodiments of the application are known to those skilled in the art, and are not described here again.

[0097] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0098] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized by, Comprise: a battery cell assembly comprising at least one battery cell column, the battery cell column comprising at least two battery cells arranged in sequence along a first direction; an FPC assembly comprising: an FPC body (10) and a signal acquisition part (20), the signal acquisition part (20) being electrically connected with the FPC body (10), the signal acquisition part (20) comprising a first transmission end (224) disposed on a first battery cell (301), a second transmission end (225) disposed on a second battery cell (302), and a weakened connection part (215) for disconnecting the first transmission end (224) and the second transmission end (225) from electrical connection; wherein the first battery cell (301) and the second battery cell (302) are oppositely disposed in the first direction, the first transmission end (224) and the second transmission end (225) are opposite in the first direction, the weakened connection part (215) is adapted to break and disconnect the first transmission end (224) and the second transmission end (225) when the first battery cell (301) and the second battery cell (302) appear to expand and the displacement generated in the first direction exceeds a displacement threshold, one of the two battery cells adjacent in the first direction is defined as the first battery cell (301), and the other is defined as the second battery cell (302) The signal acquisition part (20) comprises a substrate (21) and a wire (22) disposed on the substrate (21), the wire (22) is electrically connected with the FPC body (10), the substrate (21) defines the weakened connection part (215), and the wire (22) is stacked in the weakened connection part (215) and is adapted to break synchronously with the weakened connection part (215).

2. The battery device according to claim 1, characterized by The substrate (21) comprises a first plate segment (211) covering the first battery cell (301), a second plate segment (212) covering the second battery cell (302), and a connecting plate segment (213) between the first plate segment (211) and the second plate segment (212), the connecting plate segment (213) is provided with a hollow part (214) to define the weakened connection part (215).

3. The battery device of claim 2, wherein, The wire (22) comprises a first wire segment (221), a second wire segment (222), and a connecting segment (223), one end of the first wire segment (221) is electrically connected with the FPC body (10), the other end extends to the first plate segment (211) and forms the first transmission end (224), one end of the second wire segment (222) is electrically connected with the FPC body (10), the other end extends to the second plate segment (212) and forms the second transmission end (225), the connecting segment (223) is stacked in the weakened connection part (215), and one end is connected with the first transmission end (224), the other end is connected with the second transmission end (225).

4. The battery device according to any one of claims 1 to 3, characterized by, The width of the weakened connection (215) is greater than or equal to the wire diameter of the wire (22).

5. The battery device of claim 1, wherein The battery cell assembly further comprises a busbar (303) comprising a first connecting end (3031) and a second connecting end (3032), the first connecting end (3031) being electrically connected to the first battery cell (301), the second connecting end (3032) being electrically connected to the second battery cell (302), the first transmission end (224) being located at the first connecting end (3031), and the second transmission end (225) being located at the second connecting end (3032).

6. The battery device of claim 5, wherein, The busbar (303) further comprises a connecting portion (3033) connecting the first connecting end (3031) and the second connecting end (3032), the connecting portion (3033) being located between the first connecting end (3031) and the second connecting end (3032), and the weakened connection (215) being superposed on the connecting portion (3033).

7. The battery device of claim 5, wherein The connecting portion (3033) comprises a regular connecting segment (30331) and a weakened connecting segment (30332), the weakened connection (215) being superposed on the weakened connecting segment (30332) and adapted to break when the weakened connecting segment (30332) breaks.

8. The battery device of claim 7, wherein, The connecting portion (3033) comprises a plurality of arc-shaped connecting segments, at least one of the arc-shaped connecting segments being provided with a notch to form the weakened connecting segment (30332), and the weakened connection (215) being provided on one side of the notch.

9. The battery device of claim 7, wherein, The first connecting end (3031) and the second connecting end (3032) define a busbar surface, the connecting portion (3033) comprises a plurality of arc-shaped connecting segments, at least one of the arc-shaped connecting segments having a smaller arc starting curvature relative to the busbar surface than other arc-shaped connecting segments, and the arc-shaped connecting segment having a smaller arc starting curvature than other arc-shaped connecting segments forms the weakened connecting segment (30332).

10. An electric device, characterized by A battery device as claimed in any one of claims 1-9. A battery device as claimed in any one of claims 1-9.

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