Battery device, energy storage device and power utilization device

Abstract

The invention relates to a battery device, an energy storage device and a power utilization device. The battery device comprises a box body, a plurality of single batteries and an overcharge protection structure, the plurality of single batteries are accommodated in the box body, and the overcharge protection structure comprises a first output pole piece, a second output pole piece, a fusing assembly, a control panel and a sampling wire harness; the first output pole piece and the second output pole piece are respectively connected with the fusing assembly, and the first output pole piece is connected to one of the single batteries; the sampling wire harness is respectively connected with two of the battery monomers and the control panel, and the control panel is also connected with the fusing assembly; and the control panel is used for controlling the fusing assembly to fuse under the condition of determining that the battery device has an overcharge risk according to the battery data collected by the sampling wire harness. The battery device can be protected, various safety problems caused by overcharge of the battery device are reduced, and the safety of the battery device is improved.

Description

TECHNICAL FIELD

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

[0002] With the development of new energy technology, the application field of batteries is becoming more and more extensive. For example, new energy vehicles, unmanned aerial vehicles, intelligent robots and energy storage systems are driven by batteries.

[0003] Since overcharging of the battery can cause safety problems such as heating and burning of the battery, setting a protection structure for the battery is one of the main research directions of battery products. SUMMARY

[0004] In view of the above problems, the present application provides a battery device, an energy storage device and a power utilization device, which can protect the battery device and reduce various safety problems caused by overcharging of the battery device, thereby improving the safety of the battery device.

[0005] In a first aspect, the present application provides a battery device. The battery device comprises a box body, a plurality of battery monomers and an overcharge protection structure. The plurality of battery monomers are accommodated in the box body, and the overcharge protection structure comprises a first output pole tab, a second output pole tab, a fuse assembly, a control board and a sampling wire harness. The first output pole tab and the second output pole tab are connected with the fuse assembly respectively, and the first output pole tab is connected to one of the battery monomers. The sampling wire harness is connected with two of the battery monomers and the control board respectively, and the control board is further connected with the fuse assembly. The control board is configured to control the fuse assembly to fuse in the case that the battery data collected by the sampling wire harness determines that the battery device has an overcharge risk.

[0006] In the technical scheme of the present application, the fuse assembly is arranged between the first output pole tab and the second output pole tab, which can cut off the connection between the first output pole tab and the second output pole tab in the case that the battery device has an overcharge risk, so as to stop charging the battery device, thereby protecting the battery device, reducing various safety problems caused by overcharging of the battery device and improving the safety of the battery device.

[0007] In some embodiments, the fuse assembly comprises a main circuit and a control circuit. The main circuit is connected with the first output pole tab and the second output pole tab respectively. The control circuit is connected with the control board. The control circuit is configured to receive a control signal sent by the control board and heat the main circuit according to the control signal, so as to make the main circuit fuse. In the technical scheme of the present application, the control circuit is controlled to heat the main circuit, which can realize timely fusing and cutting off the connection between the first output pole tab and the second output pole tab, thereby protecting the battery device and improving the safety of the battery device.

[0008] In some embodiments, the main circuit includes a current fuse and a first metal piece, the control circuit includes a heating sheet and a second metal piece; the current fuse is connected in parallel with the first metal piece, and two ends of the current fuse are connected with the first output tab and the second output tab respectively; a first end of the heating sheet is connected with the control board, a second end of the heating sheet is connected with a first end of the second metal piece, and a second end of the second metal piece is connected with the control board; the heating sheet is used to heat the first metal piece according to a control signal; the first metal piece is used to be fused when the temperature after heating exceeds a preset temperature threshold; the current fuse is used to be fused when the first metal piece is fused and the current carried exceeds a preset current threshold, and the connection between the first output tab and the second output tab is cut off. In the technical scheme of the embodiments of the application, the fuse assembly adopts a thermal fusing structure, which is simple in structure, easy to implement, and low in cost, can reduce the cost of the overcharge protection structure, and timely fuses when the battery device has an overcharge risk, thereby protecting the battery device.

[0009] In some embodiments, the fuse assembly further includes a first connecting lug, a second connecting lug, a signal line and a first connector; the first connecting lug is connected with the first end of the current fuse and the first output tab respectively, and the second connecting lug is connected with the second end of the current fuse and the second output tab respectively; a first end of the signal line is connected with the first end of the heating sheet and the second end of the second metal piece respectively, and a second end of the signal line is connected with the first connector; the first connector is connected with the control board. In the technical scheme of the embodiments of the application, the fuse assembly is connected with the first output tab, the second output tab and the control board through the first connecting lug, the second connecting lug, the signal line and the first connector, not only the connection is stable and the reliability of signal transmission is high, but also the expansion of the connection port can be realized through the connector, which is suitable for more scenes.

[0010] In some embodiments, the first connecting lug and the second connecting lug adopt an aluminum-copper transition strip; a part connected with the current fuse of the aluminum-copper transition strip includes copper, and a part connected with the first output tab or the second output tab includes aluminum. In the technical scheme of the embodiments of the application, the aluminum-copper transition strip has good electrical conductivity, which can meet the requirements of the fuse assembly and the output tab on the electrical conductivity, and the use of the aluminum-copper transition strip to connect the fuse assembly and the output tab can reduce the risk of fracture at the connection, reduce the problems of increased resistance, heating and the like caused by being unable to contact, and improve the reliability and stability of the electrical connection.

[0011] In some embodiments, the fuse assembly further comprises an assembly shell, the current fuse is arranged in the assembly shell, the first connecting lug and the second connecting lug are arranged through the assembly shell, and the assembly shell is provided with a thinned area at the edge close to the first connecting lug and the second connecting lug. In the technical scheme of the embodiment of the application, the assembly shell can protect the fuse assembly, avoid damage of the fuse assembly due to external force, and the thinned area of the assembly shell facilitates the integrated arrangement of the fuse assembly and the shell of the overcharge protection structure.

[0012] In some embodiments, the sampling harness comprises two sampling wires and a second connector; a sampling terminal is arranged at the first end of each sampling wire, and the second end of each sampling wire is connected with the second connector; the two sampling terminals are respectively connected with two bus bars of the battery device, the two bus bars are connected with electrode terminals of two battery monomers; and the second connector is connected with the control board. In the technical scheme of the embodiment of the application, the second connector can expand the connection interface, realize the connection between various sampling wires and the control board, so that the control board can acquire battery data, realize appropriate control according to the battery data, and further protect the battery device.

[0013] In some embodiments, the material of the sampling terminal comprises nickel, and the sampling terminal is connected with the sampling wire through a welding process. In the technical scheme of the embodiment of the application, nickel has good conductivity, so that the sampling terminal can effectively transmit current, so that the control board can acquire accurate battery data and timely perform corresponding control. Moreover, nickel has good compatibility with various welding materials, which can ensure the firmness and conductivity of the welding point.

[0014] In some embodiments, the wire diameter of each sampling wire ranges from 1.5 mm to 2.5 mm. In the technical scheme of the embodiment of the application, the wire diameter of the sampling wire is about 2 mm, which has high mechanical strength and good tensile strength. Moreover, the sampling wire with a wire diameter of 2 mm has the characteristics of low resistance and high efficient conductivity, which can well meet the demand of large current and reduce line loss.

[0015] In some embodiments, the overcharge protection structure comprises a support shell; the second output pole bus bar, the fuse assembly and the control board are arranged in the support shell. In the technical scheme of the embodiment of the application, the support shell can realize the integration of the first output pole bus bar, the second output pole bus bar, the fuse assembly and the control board, so as to improve the space utilization and reduce the cost by reducing the assembly process.

[0016] In some embodiments, one side of the control board provided with devices faces the support shell. In the technical scheme of the embodiment of the application, the support shell protects the devices arranged on the control board.

[0017] In some embodiments, the box comprises a plurality of side plates, the plurality of side plates being arranged around the plurality of battery monomers; the overcharge protection structure is fixed on any one of the side plates.

[0018] In a second aspect, the application further provides a storage device, comprising the battery device according to any one of the first aspect. In the technical scheme of the embodiments of the application, the safety of the battery device can be improved by the overcharge protection structure, and thus the safety of the storage device can be improved.

[0019] In a third aspect, the application further provides a power consumption device, comprising the battery device according to the first aspect. In the technical scheme of the embodiments of the application, the safety of the battery device can be improved by the overcharge protection structure, and thus the safety of the power consumption device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description, with reference to the drawings. The drawings are for purposes of illustration only and are not intended to limit the application thereto. The same reference numbers in different drawings identify the same components throughout the text. In the drawings:

[0021] Figure 1 is a structural schematic diagram of a power consumption device according to an embodiment of the application;

[0022] Figure 2 is a structural schematic diagram of a battery device according to an embodiment of the application;

[0023] Figure 3 is a structural schematic diagram of a battery device according to an embodiment of the application;

[0024] Figure 4 is a structural schematic diagram of an overcharge protection structure according to an embodiment of the application;

[0025] Figure 5 is a circuit schematic diagram of a fuse assembly according to an embodiment of the application;

[0026] Figure 6 is a circuit schematic diagram of a fuse assembly according to an embodiment of the application;

[0027] Figure 7 is a structural schematic diagram of a fuse assembly according to an embodiment of the application;

[0028] Figure 8 is a schematic diagram of a thinning region according to an embodiment of the application;

[0029] Figure 9 is a structural schematic diagram of a sampling harness according to an embodiment of the application;

[0030] Figure 10 is a structural diagram of an overcharge protection structure according to another embodiment of the present application;

[0031] Figure 11 It is a structural schematic diagram of a side panel according to an embodiment of the present application.

[0032] Description of reference numerals:

[0033] Battery device 1 Controller 2 Motor 3 Overcharge protection structure 10 Battery cell 20 Box 30

[0034] First output terminal 11 Second output terminal 12 Fuse assembly 13 Control board 14

[0035] Sampling harness 15 Main circuit 131 Control circuit 132

[0036] Current fuse First metal part ATCO1 Heating plate FH Second metal part ATCO2 First connecting ear 133 Second connecting ear 134 Signal line 135 First connector 136

[0037] Component housing 137 Sampling line 151 Second connector 152 Sampling terminal 153

[0038] Supporting shell 16 side plate 301. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to“an embodiment” herein 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“in an embodiment” in various places in the specification are not necessarily referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments of the application, the term“and / or” only means a relationship between associated objects, which can exist in three relationships, and A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0044] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0045] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connecting”,“connecting”,“fixing” and the like should be understood in a broad sense, and exemplary can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0046] With the development of new energy technology, the application field of battery is more and more extensive, for example, new energy vehicles, unmanned aerial vehicles, intelligent robots driven by batteries, and energy storage systems constructed by batteries, etc. Since overcharging of the battery can cause safety problems such as battery heating and burning, therefore, setting a protection structure for the battery is one of the main research directions of the battery product.

[0047] To solve the above problems, the application provides a battery device overcharge protection structure. The overcharge protection structure comprises a first output pole tab, a second output pole tab, a fuse assembly, a control board and a sampling harness. The sampling harness collects battery data, and the control board controls the fuse assembly to fuse when it is determined that the battery device has an overcharge risk according to the battery data. In the technical solution of the application, the fuse assembly is arranged between the first output pole tab and the second output pole tab, so that the connection between the first output pole tab and the second output pole tab can be cut off when the battery device has an overcharge risk, and the battery device is no longer charged, thereby protecting the battery device and reducing various safety problems caused by overcharge of the battery device, and improving the safety of the battery device.

[0048] The battery device disclosed in the application can be used in a power consumption device using the battery device as a power source, or various energy storage devices, energy storage systems and charging networks using the battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, and the spacecraft can include airplanes, rockets, space shuttles and spaceships.

[0049] The following embodiments are described by taking a vehicle as an example for convenience of description. Referring to Figure 1 , Figure 1 The vehicle structure schematic diagram provided by some embodiments of the application. The vehicle can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended range car. The vehicle is internally provided with a battery device (Battery Apparatus). The battery device 1 can be arranged at the bottom, head or tail of the vehicle. The battery device 1 can be used for power supply of the vehicle. For example, the battery device 1 can be used as an operating power source of the vehicle. The vehicle can further include a controller 2 and a motor 3. The controller 2 is used to control the battery device 1 to supply power to the motor 3, for example, for the working power demand of the vehicle during starting, navigation and driving.

[0050] According to some embodiments of the application, the battery device 1 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle.

[0051] According to some embodiments of the application, referring to Figure 2 and Figure 3 , a battery device is provided. The battery device 1 comprises an overcharge protection structure 10, a plurality of battery monomers 20 and a box body 30, and the plurality of battery monomers 20 are accommodated in the box body 30.Figure 4 The overcharge protection structure 10 comprises a first output tab 11, a second output tab 12, a fuse assembly 13, a control board 14 and a sampling harness 15. The first output tab 11 and the second output tab 12 are respectively connected with the fuse assembly 13, and the first output tab 11 is connected with one of the battery monomers 20. The sampling harness 15 is respectively connected with two of the battery monomers 20 and the control board 14, and the control board 14 is further connected with the fuse assembly 13. The control board 14 is configured to control the fuse assembly 13 to fuse in the case that it is determined that the battery device has an overcharge risk according to the battery data collected by the sampling harness 15.

[0052] In the embodiments of the present application, the battery monomers 20 can be multiple, and the multiple battery monomers 20 are connected in series, in parallel or in a mixed manner through the bus bars. Each battery monomer 20 can be a secondary battery or a primary battery. The secondary battery refers to a battery monomer that can be activated by charging after discharging. The battery monomer 20 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 embodiments of the present application are not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0053] The box 30 is configured to provide a containing space for the battery monomers 20. The box 30 can adopt various structures.

[0054] The overcharge protection structure 10 comprises the first output tab 11, the second output tab 12 and the fuse assembly 13. The fuse assembly 13 is connected between the first output tab 11 and the second output tab 12. The first output tab 11 is connected with one of the battery monomers 20, and the second output tab 12 serves as a port of the battery device 1. Exemplarily, the multiple battery monomers 20 in the battery device 1 are connected in series to form a series circuit, the first output tab 11 is connected with one end of the series circuit, and the second output tab 12 serves as a port of the series circuit. The series circuit can supply power to a load through the first output tab 11, the fuse assembly 13 and the second output tab 12, and an external charging device can charge the series circuit through the second output tab 12, the fuse assembly 13 and the first output tab 11.

[0055] Referring to Figure 4The overcharge protection structure 10 includes a control board 14 and a sampling harness 15, and the control board 14 is connected with the fuse assembly 13 and the sampling harness 15 respectively. The sampling harness 15 is also connected with two battery monomers. In this way, the sampling harness 15 can collect the battery data such as the voltage and current between the two battery monomers 20 and transmit the battery data to the control board 14. The control board 14 determines whether the battery device 1 has an overcharge risk according to the battery data. For example, the control board 14 compares the collected battery voltage with a preset reference voltage, and determines that the battery device 1 has an overcharge risk when the battery voltage is greater than the reference voltage.

[0056] It should be noted that the manner of determining whether the battery device 1 has an overcharge risk is not limited to the above example, and can be set according to actual conditions.

[0057] When the control board 14 determines that the battery device 1 has an overcharge risk, the control board 14 sends a control signal to the fuse assembly 13. The fuse assembly 13 receives the control signal and fuses according to the control signal. In this way, the connection between the first output tab 11 and the second output tab 12 is cut off, and the charging equipment can no longer charge the battery in the battery device 1 through the second output tab 12, the fuse assembly 13 and the first output tab 11.

[0058] In the above embodiment, the battery device 1 includes an overcharge protection structure 10, a plurality of battery monomers 20 and a box 30, and the plurality of battery monomers 20 are accommodated in the box 30. The overcharge protection structure 10 includes a first output tab 11, a second output tab 12, a fuse assembly 13, a control board 14 and a sampling harness 15; the sampling harness 15 collects battery data, and the control board 14 controls the fuse assembly 13 to fuse when it is determined that the battery device 1 has an overcharge risk according to the battery data. In the technical scheme of the embodiment of the application, the fuse assembly is arranged between the first output tab and the second output tab, so that the connection between the first output tab and the second output tab can be cut off when the battery device has an overcharge risk, and the battery device is no longer charged, thereby protecting the battery device and reducing various safety problems caused by overcharge of the battery device, and improving the safety of the battery device.

[0059] According to some embodiments of the application, with reference to Figure 5 The fuse assembly 13 includes a main circuit 131 and a control circuit 132; the main circuit 131 is connected with the first output tab 11 and the second output tab 12 respectively; the control circuit 132 is connected with the control board 14; and the control circuit 132 is configured to receive the control signal sent by the control board 14 and heat the main circuit 131 according to the control signal, so that the main circuit 131 fuses.

[0060] In the embodiment, the fuse assembly 13 comprises a main circuit 131 and a control circuit 132; the port P1 of the main circuit 131 is connected with the first output tab 11, and the port P2 of the main circuit 131 is connected with the second output tab 12; the ports P3 and P4 of the control circuit 132 are connected with the control board 14.

[0061] The control board 14 outputs a control signal to the control circuit 132 of the fuse assembly 13 in the case that the battery device 1 has overcharge risk. The control circuit 132 receives the control signal, heats the main circuit 131 according to the control signal, and the main circuit 131 is fused when the temperature after heating exceeds a preset temperature threshold. Since the main circuit 131 is connected with the first output tab 11 and the second output tab 12 respectively, the connection between the first output tab 11 and the second output tab 12 is cut off after the main circuit 131 is fused.

[0062] It should be noted that the fuse assembly 13 can also use other fusing methods in addition to the above-mentioned thermal fusing method. The embodiment does not limit this, and can be set according to the actual situation.

[0063] In the above embodiment, the fuse assembly 13 comprises a main circuit 131 and a control circuit 132; the control circuit 132 receives the control signal sent by the control board 14, and heats the main circuit 131 according to the control signal to fuse the main circuit 131. In the technical scheme of the embodiment, the control circuit is controlled to heat the main circuit, which can realize timely fusing and cut off the connection between the first output tab and the second output tab, thereby protecting the battery device and improving the safety of the battery device.

[0064] According to some embodiments of the present application, with reference to Figure 6 , the main circuit 131 comprises a current fuse Fuse and a first metal piece ATCO1, and the control circuit 132 comprises a heating sheet FH and a second metal piece ATCO2; the current fuse Fuse is connected in parallel with the first metal piece ATCO1, and the two ends of the current fuse Fuse are respectively connected with the first output tab 11 and the second output tab 12; the first end of the heating sheet FH is connected with the control board 14, the second end of the heating sheet FH is connected with the first end of the second metal piece ATCO2, and the second end of the second metal piece ATCO2 is connected with the control board 14; the heating sheet FH is used to heat the first metal piece ATCO1 according to the control signal; the first metal piece ATCO1 is used to be fused when the temperature after heating exceeds a preset temperature threshold; the current fuse Fuse is used to be fused when the first metal piece ATCO1 is fused and the current carried exceeds a preset current threshold, thereby cutting off the connection between the first output tab 11 and the second output tab 12.

[0065] In the embodiment, the main circuit 131 includes a current fuse Fuse and a first metal piece ATCO1. The first end of the current fuse Fuse is connected with the first output tab 11 through the port P1, and the second end of the current fuse Fuse is connected with the second output tab 12 through the port P2. The first end of the first metal piece ATCO1 is connected with the first output tab 11 through the port P1, and the second end of the first metal piece ATCO1 is connected with the second output tab 12 through the port P2.

[0066] The control circuit 132 includes a heating sheet FH and a second metal piece ATCO2. The first end of the heating sheet FH is connected with the control board 14, the second end of the heating sheet FH is connected with the first end of the second metal piece ATCO2, and the second end of the second metal piece ATCO2 is connected with the control board 14.

[0067] The control board 14 outputs a control signal to the control circuit 132 of the fuse assembly 13 in a case where it is determined that the battery device 1 has a risk of overcharging. The control signal is input to the control circuit 132 through the port P2 and the port P3, and the heating sheet FH is heated under the control of the control signal to heat the first metal piece ATCO1 in the main circuit 131. After the first metal piece ATCO1 is heated, if the temperature exceeds a preset temperature threshold, the first metal piece ATCO1 is fused. After the first metal piece ATCO1 is fused, if the current carried by the current fuse Fuse exceeds a preset current threshold, the current fuse Fuse is fused. After the first metal piece ATCO1 and the current fuse Fuse are both fused, the connection between the first output tab 11 and the second output tab 12 is cut off.

[0068] The heating sheet FH also heats the second metal piece ATCO2, and the second metal piece ATCO2 is also fused when the temperature is too high, which can protect the heating sheet FH.

[0069] In some embodiments, the materials of the first metal piece ATCO1 and the second metal piece ATCO2 can be low-melting-point alloys.

[0070] In the above embodiment, the main circuit 131 includes a current fuse Fuse and a first metal piece ATCO1, and the control circuit 132 includes a heating sheet FH and a second metal piece ATCO2. The heating sheet FH is heated according to a control signal to heat the first metal piece ATCO1. The first metal piece ATCO1 is fused when the temperature after heating exceeds a preset temperature threshold. The current fuse Fuse is fused when the first metal piece ATCO1 is fused and the current carried by the current fuse Fuse exceeds a preset current threshold, and the connection between the first output tab 11 and the second output tab 12 is cut off. In the technical solution of the embodiment, the fuse assembly adopts a thermal-fusion structure, which is simple in structure, easy to implement, and low in cost. The cost of the overcharge protection structure can be reduced, and the battery device can be fused in time in a case where the battery device has a risk of overcharging, thereby protecting the battery device.

[0071] According to some embodiments of the present application, with reference to Figure 7 The fuse assembly 13 further comprises a first connecting lug 133, a second connecting lug 134, a signal line 135 and a first connector 136; the first connecting lug 133 is connected with the first end of the current fuse Fuse and the first output pole tab 11 respectively, and the second connecting lug 134 is connected with the second end of the current fuse Fuse and the second output pole tab 12 respectively; the first end of the signal line 135 is connected with the first end of the heating tab FH and the second end of the second metal piece ATCO2 respectively, and the second end of the signal line 135 is connected with the first connector 136; the first connector 136 is connected with the control board 14.

[0072] In the embodiments of the present application, the fuse assembly 13 comprises the first connecting lug 133 and the second connecting lug 134; the first connecting lug 133 serves as the port P1 and is connected with the first end of the current fuse Fuse and the first output pole tab 11 respectively; and the second connecting lug 134 serves as the port P2 and is connected with the second end of the current fuse Fuse and the second output pole tab 12 respectively.

[0073] The first end of the signal line 135 is connected with the first end of the heating tab FH through the port P3 and is connected with the second end of the second metal piece ATCO2 through the port P4; the second end of the signal line 135 is connected with the first connector 136, and the first connector 136 is connected with the control board 14. The control signal of the control board 14 is transmitted to the port P3 and the port P4 through the first connector 136 and the signal line 135, so as to heat the heating tab FH.

[0074] In some embodiments, there are two signal lines 135; the first end of one signal line 135 is connected with the first end of the heating tab FH through the port P3, and the second end is connected with the first connector 136; and the first end of the other signal line is connected with the second end of the second metal piece ATCO2 through the port P4, and the second end is connected with the first connector 136.

[0075] In the above embodiments, the fuse assembly 13 further comprises the first connecting lug 133, the second connecting lug 134, the signal line 135 and the first connector 136. In the technical solution of the embodiments of the present application, the fuse assembly is connected with the first output pole tab, the second output pole tab and the control board through the first connecting lug, the second connecting lug, the signal line and the first connector, which not only has stable connection and high reliability of signal transmission, but also can realize expansion of the connection port through the connector, and is suitable for more scenes.

[0076] According to some embodiments of the present application, the first connecting lug 133 and the second connecting lug 134 adopt an aluminum-copper transition strip; the part connected with the current fuse Fuse includes copper, and the part connected with the first output lug 11 or the second output lug 12 includes aluminum.

[0077] In the embodiments of the present application, the materials of the first output lug 11 and the second output lug 12 include aluminum, and the first connecting lug 133 and the second connecting lug 134 can adopt an aluminum-copper transition strip. For example, the part of the first connecting lug 133 connected with the current fuse Fuse can adopt copper, and the part of the first connecting lug 133 connected with the first output lug 11 can adopt aluminum; the part of the second connecting lug 134 connected with the current fuse Fuse can adopt copper, and the part of the second connecting lug 134 connected with the second output lug 12 can adopt aluminum.

[0078] In some embodiments, the connection between the first connecting lug 133 and the first output lug 11 can adopt a welding process, and the connection between the second connecting lug 134 and the second output lug 12 can also adopt a welding process. The welding process can include laser welding or friction stir welding. It should be noted that the connection method is not limited to the welding process, and can be selected according to actual conditions.

[0079] In the above embodiments, the first connecting lug and the second connecting lug adopt an aluminum-copper transition strip. In the technical solution of the embodiments of the present application, the aluminum-copper transition strip has good electrical conductivity, which can meet the requirements of the fuse assembly and the output lug on the electrical conductivity, and the use of the aluminum-copper transition strip to connect the fuse assembly and the output lug can reduce the risk of fracture at the connection, reduce the problems of increased resistance and heating caused by failure to contact, and improve the reliability and stability of the electrical connection.

[0080] According to some embodiments of the present application, referring to Figure 8 , the fuse assembly 13 further includes an assembly shell 137, the current fuse Fuse is arranged in the assembly shell 137, the first connecting lug 133 and the second connecting lug 134 are arranged in the assembly shell 137, and the assembly shell 137 is provided with a thinned area at the edge close to the first connecting lug 133 and the second connecting lug 134.

[0081] In the embodiments of the present application, the fuse assembly 13 further includes an assembly shell 137. The current fuse Fuse is arranged in the assembly shell 137.

[0082] The first connecting lug 133 and the second connecting lug 134 are arranged in the assembly shell 137, and the parts of the first connecting lug 133 and the second connecting lug 134 inside the assembly shell 137 can adopt copper, and the parts outside the assembly shell 137 can adopt aluminum. The assembly shell 137 is provided with a thinned area close to the first connecting lug 133 and the second connecting lug 134, as shown inFigure 5 The area indicated by the dashed line box.

[0083] In the above embodiment, the fuse assembly 13 further comprises an assembly shell 137. In the technical solution of the embodiment of the application, the assembly shell can protect the fuse assembly from damage due to external force, and the assembly shell is provided with a thinned area to facilitate the integrated arrangement of the fuse assembly and the shell of the overcharge protection structure.

[0084] According to some embodiments of the application, referring to Figure 9 The sampling harness 15 comprises two sampling wires 151 and a second connector 152. The first end of each sampling wire 151 is provided with a sampling terminal 153, and the second end of each sampling wire 151 is connected to the second connector 152. The two sampling terminals 153 are respectively connected to two bus bars of the battery device 1, and the two bus bars are connected to electrode terminals of the two battery monomers 20. The second connector 152 is connected to the control board 14.

[0085] In the embodiment of the application, the sampling harness 15 comprises two sampling wires 151 and a second connector 152. The first end of each sampling wire 151 is provided with a sampling terminal 153, and the second end of each sampling wire 151 is connected to the second connector 152. The two sampling terminals 153 are respectively connected to bus bars of the battery device 1, and the bus bars are connected to electrodes of the two battery monomers 20, so as to collect battery data such as the battery voltage between the two battery monomers 20. The second connector 152 is connected to the control board 14.

[0086] The battery data collected by the sampling terminal 153 from the battery device 1 is transmitted to the control board 14 through the sampling wire 151 and the second connector 152. The control board 14 determines whether the battery device has an overcharge risk according to the battery data.

[0087] In the above embodiment, the sampling harness 15 comprises two sampling wires 151 and a second connector 152. In the technical solution of the embodiment of the application, the second connector can expand the connection interface to realize the connection between various sampling wires and the control board, so that the control board can obtain battery data and realize appropriate control according to the battery data, thereby protecting the battery device.

[0088] According to some embodiments of the application, the material of the sampling terminal 153 comprises nickel, and the sampling terminal 153 is connected to the sampling wire 151 through a welding process.

[0089] In the technical solution of the embodiment of the application, nickel has good electrical conductivity, so that the sampling terminal can effectively transmit current, so that the control board can obtain accurate battery data and timely perform corresponding control. In addition, nickel has good compatibility with various welding materials, which can ensure the firmness and electrical conductivity of the welding point.

[0090] According to some embodiments of the present application, the diameter of each sampling line 151 ranges from 1.5 mm to 2.5 mm.

[0091] In the technical solution of the embodiment of the present application, the sampling line has a wire diameter of about 2 mm, has high mechanical strength, and has good tensile strength. In addition, the sampling line with a wire diameter of 2 mm has the characteristics of low resistance and high efficiency conductivity, which can well meet the needs of large current and reduce line loss.

[0092] According to some embodiments of the present application, referring to Figure 10 The overcharge protection structure 10 includes a supporting shell 16 ; the second output pole piece 12 , the fuse assembly 13 and the control board 14 are arranged in the supporting shell 16 .

[0093] In the embodiment of the present application, the overcharge protection structure 10 further includes a support housing 16, and the first output electrode 11, the second output electrode 12, the fuse assembly 13, and the control board 14 can be integrated together through the support housing 16. The support housing 16 is manufactured by an injection molding process and is provided with a plurality of slots, and the second output electrode 12, the fuse assembly 13, and the control board 14 are arranged in the slots of the support housing 16.

[0094] The supporting shell 16 is provided with an opening, and at least a portion of the second output pole piece 12 can be exposed to the outside through the opening, thereby realizing the connection between the battery device 1 and other battery devices or other equipment.

[0095] In the above embodiment, the overcharge protection structure 10 includes a support housing 16; the second output electrode 12, the fuse assembly 13, and the control board 14 are disposed in the support housing 16. In the technical solution of the embodiment of the present application, the support housing can be used to integrate the first output electrode, the second output electrode, the fuse assembly, and the control board into a whole, thereby improving space utilization and reducing costs by reducing assembly steps.

[0096] According to some embodiments of the present application, a surface of the control board 14 where the device is disposed faces the supporting housing 16 .

[0097] In the embodiment of the present application, the control board 14 can be a PCBA (Printed Circuit Board Assembly). Typically, components on a PCBA are arranged on the same side. In actual applications, the side with the components arranged can be facing the support housing, and the support housing can protect the components arranged on the PCBA.

[0098] According to some embodiments of the present application, the box body 30 includes a plurality of side panels 301 , which are arranged around a plurality of battery cells 20 ; and the overcharge protection structure 10 is fixed on any one of the side panels 301 .

[0099] In the embodiment of the present application, multiple battery cells 20 are connected in series, and multiple side plates 301 are arranged around the multiple battery cells 20 to protect the battery cells 20 and other components inside the battery device 1. At the same time, they can also provide certain structural support for the battery device 1, so that the entire battery device 1 maintains a stable shape.

[0100] In some embodiments, the side panels 301 may be made of a high-strength metal material, such as aluminum alloy. Aluminum alloy side panels are lightweight, which can reduce the weight of the entire battery device. In addition, aluminum alloy has high strength and can withstand certain impact forces.

[0101] In some embodiments, side panels 301 may also be made of composite materials, such as carbon fiber reinforced composite materials. This material has high strength, high modulus, and excellent corrosion resistance. It can effectively resist chemical corrosion in the battery operating environment while providing excellent mechanical properties to protect the integrity of the battery device.

[0102] The overcharge protection structure 10 can be fixed on any side plate 301. Figure 11 As shown, the overcharge protection structure 10 is fixed to a side of the side plate 301 close to the battery cell 20 . This arrangement can not only fully utilize the space of the battery device, but also protect the overcharge protection structure 10 .

[0103] The overcharge protection structure 10 can be fixed by connecting parts such as nuts, and the specific fixing method is determined according to the actual application situation.

[0104] The overcharge protection structure 10 includes a first output pole piece 11, a second output pole piece 12, a fuse component 13, a control board 14 and a sampling harness 15; the sampling harness 15 collects battery data, and the control board 14 controls the fuse component 13 to blow when it determines that the battery device has an overcharge risk based on the battery data.

[0105] In the above embodiment, the box body 30 includes a plurality of side panels 301. In the technical solution of the embodiment of the present application, the side panels can protect the internal batteries and overcharge protection structure of the battery device, thereby improving the safety of the battery device.

[0106] According to some embodiments of the present application, an energy storage device is provided, which includes the battery device in the above embodiment.

[0107] In the technical scheme of the embodiment of the present application, the energy storage device comprises the battery device, the battery device comprises the overcharge protection structure in the above embodiment, and the overcharge protection structure can cut off the connection between the battery and the external device in the case that the battery device has an overcharge risk, thereby protecting the battery device, reducing various safety problems caused by overcharge of the battery device, and further improving the safety of the energy storage device.

[0108] According to some embodiments of the present application, a power utilization device is provided, which comprises the battery device in the above embodiment.

[0109] In the technical scheme of the embodiment of the present application, the power utilization device comprises the battery device, the battery device comprises the overcharge protection structure in the above embodiment, and the overcharge protection structure can cut off the connection between the battery and the external device in the case that the battery device has an overcharge risk, thereby protecting the battery device, reducing various safety problems caused by overcharge of the battery device, and further improving the safety of the power utilization device.

[0110] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0111] The above embodiments only express several implementation manners of the present application, facilitate specific and detailed understanding of the technical scheme of the present application, but cannot be understood as the limitation of the patent protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, on the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. It should be understood that, the technical scheme obtained by the skilled in the art through logical analysis, reasoning or limited test on the basis of the technical scheme provided by the present application, all falls within the protection scope of the appended claims of the present application. Therefore, the patent protection scope of the present application should be based on the content of the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A battery device, characterized in that: It includes a box, a plurality of battery cells and an overcharge protection structure, wherein the plurality of battery cells are accommodated in the box, and the overcharge protection structure includes a first output pole piece, a second output pole piece, a fuse assembly, a control board and a sampling harness; The first output pole piece and the second output pole piece are respectively connected to the fuse assembly, and the first output pole piece is connected to one of the battery cells; The sampling harness is respectively connected to two of the battery cells and the control board, and the control board is also connected to the fuse assembly; The control board is used to control the fuse component to fuse when it is determined that the battery device has an overcharge risk based on the battery data collected by the sampling harness.

2. The battery device according to claim 1, wherein: The fuse assembly includes a main circuit and a control circuit; The main circuit is connected to the first output pole piece and the second output pole piece respectively; The control circuit is connected to the control board; The control circuit is used to receive a control signal sent by the control board and heat the main circuit according to the control signal to cause the main circuit to fuse.

3. The battery device according to claim 2, characterized in that The main circuit includes a current fuse and a first metal member, and the control circuit includes a heating plate and a second metal member; The current fuse is connected in parallel with the first metal member, and two ends of the current fuse are connected to the first output pole piece and the second output pole piece respectively; The first end of the heating plate is connected to the control board, the second end of the heating plate is connected to the first end of the second metal member, and the second end of the second metal member is connected to the control board; The heating plate is used to increase the temperature according to the control signal to heat the first metal part; The first metal member is configured to fuse when the heated temperature exceeds a preset temperature threshold; The current fuse is used to melt when the first metal part melts and the carrying current exceeds a preset current threshold, thereby cutting off the connection between the first output pole piece and the second output pole piece.

4. The battery device according to claim 3, characterized in that The fuse assembly further includes a first connecting ear, a second connecting ear, a signal line and a first connector; The first connecting lug is connected to the first end of the current fuse and the first output pole piece respectively, and the second connecting lug is connected to the second end of the current fuse and the second output pole piece respectively; The first end of the signal line is connected to the first end of the heating plate and the second end of the second metal member respectively, and the second end of the signal line is connected to the first connector; The first connector is connected to the control board.

5. The battery device according to claim 4, characterized in that The first connecting lug and the second connecting lug are made of aluminum-copper transition strip; The portion of the aluminum-copper transition zone connected to the current fuse includes copper, and the portion connected to the first output pole piece or the second output pole piece includes aluminum.

6. The battery device according to claim 4, characterized in that The fuse assembly further includes an assembly housing, the current fuse is disposed in the assembly housing, the first connecting ear and the second connecting ear are passed through the assembly housing, and a thinned area is provided at an edge of the assembly housing near the first connecting ear and the second connecting ear.

7. The battery device according to claim 1, wherein: The sampling harness includes two sampling lines and a second connector; A sampling terminal is provided at the first end of each sampling line, and a second end of each sampling line is connected to the second connector; The two sampling terminals are respectively connected to the two busbars of the battery device, and the two busbars are connected to the electrode terminals of the two battery cells; The second connector is connected to the control board.

8. The battery device according to claim 7, characterized in that The sampling terminal is made of nickel, and is connected to the sampling line by welding.

9. The battery device according to claim 8, characterized in that The diameter of each sampling line ranges from 1.5 mm to 2.5 mm.

10. The battery device according to any one of claims 1 to 9, characterized in that: The overcharge protection structure includes a supporting shell; the second output pole piece, the fuse assembly and the control board are arranged in the supporting shell.

11. The battery device according to claim 10, characterized in that The control panel is provided with a device facing the supporting shell.

12. The battery device according to claim 10, wherein: The box body includes a plurality of side panels, The plurality of side plates are arranged around the plurality of battery cells. The overcharge protection structure is fixed on any one of the side plates.

13. An energy storage device, characterized in that: The energy storage device comprises the battery device according to any one of claims 1-12.

14. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1-12.

Images