Battery devices and power-consuming devices

Abstract

The present application provides a battery device and an electrical device, wherein the battery device includes a plurality of battery cells, a plurality of busbars, a sampling harness, and a sampling on-off assembly. The plurality of busbars electrically connect the plurality of battery cells. The sampling harness includes a first acquisition line and a second acquisition line, wherein the first acquisition line is connected to the busbar. The sampling on-off assembly includes a controller and a circuit breaker, wherein the first acquisition line and the second acquisition line are electrically connected via the circuit breaker, wherein the circuit breaker includes a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part, wherein the controller controls the on-off of the third conductive part and at least one of the first conductive part and the second conductive part according to the collected information. The present application can improve the reliability of the battery device.

Description

Technical Field

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

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, how to improve the reliability of battery devices has always been a research direction in battery technology. Summary of the invention

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device, which includes a plurality of battery cells, a plurality of current collectors, a sampling harness, and a sampling on-off assembly. The plurality of current collectors electrically connect the plurality of battery cells. The sampling harness includes a first acquisition line and a second acquisition line, and the first acquisition line is connected to the current collector. The sampling on-off assembly includes a controller and a circuit breaker, the first acquisition line and the second acquisition line are electrically connected through the circuit breaker, the circuit breaker includes a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part, and the controller controls the on-off of the third conductive part and at least one of the first conductive part and the second conductive part according to the collected information.

[0006] In the above scheme, by setting a controller, when the collected information exceeds the threshold range, the controller can control the circuit breaker to disconnect, so that the first collection line and the second collection line are disconnected, thereby reducing the risk of short circuit between adjacent sampling harnesses due to damage to the insulation sheath of the sampling harness caused by thermal runaway of the battery cell, thereby improving the reliability of the battery device.

[0007] In some embodiments, the battery cell includes a first electrode terminal and a second electrode terminal, the busbar includes a first sub-busbar and a second sub-busbar, the first collection line includes a first sub-collection line and a second sub-collection line, the first electrode terminal is electrically connected to the first sub-busbar, and the second electrode terminal is electrically connected to the second sub-busbar. The first sub-collection line and the second sub-collection line are both connected to the same first sub-busbar.

[0008] In the above scheme, by setting the first sub-collection line and the second sub-collection line, when the first sub-collection line and the second sub-collection line collect different information, multiple information on the battery cell can be collected, so that the battery management system in the battery device can control the battery device through multiple information; when the first sub-collection line and the second sub-collection line collect the same information, when one of the first sub-collection line and the second sub-collection line fails, the other can still be used, thereby reducing the maintenance cost of the battery device and improving the reliability of the battery device.

[0009] In some embodiments, the number of the first sub-collecting lines includes a plurality, and the plurality of first sub-collecting lines are respectively connected to the first sub-bus component and the second sub-bus component to reduce the number of arranged sampling line bundles, thereby reducing the manufacturing cost of the battery device.

[0010] In some embodiments, the collected information of one of the first sub-collection line and the second sub-collection line includes voltage, and the collected information of the other sub-collection line includes temperature.

[0011] In the above scheme, by collecting voltage information and temperature information, the battery cell can be detected from multiple aspects, thereby reducing the possibility of the insulation layer of the sampling harness being damaged after the battery cell has thermal runaway, resulting in a short circuit of the adjacent sampling harness.

[0012] In some embodiments, the information collected by the first sub-collection line includes voltage, the information collected by the second sub-collection line includes temperature, the busbar component includes a fuse, and the second sub-collection line is connected to the fuse.

[0013] In the above scheme, since the current carrying capacity of the fuse part of the busbar component is smaller than the current carrying capacity of other areas of the busbar component, the temperature rise rate of the fuse part of the busbar component is faster than the temperature rise rate of other areas of the busbar component. When a battery cell fails, the current in the busbar component increases, and the temperature rise of the busbar component becomes more obvious. The second sub-collection line is connected to the fuse part, so that the second sub-collection line can collect temperature information on the fuse part, thereby improving the accuracy and timeliness of the collected information, reducing the possibility of a failed battery cell affecting surrounding battery cells, and improving the reliability of the battery device.

[0014] This reduces the possibility that the second acquisition line cannot collect the temperature on the converging component after the fuse on the converging component is disconnected, thereby improving the accuracy of the information collected by the sampling harness.

[0015] In some embodiments, the battery device further includes an isolating member, the isolating member is located between the sampling harness and the battery cell, and one of the isolating member and the busbar component is fixedly connected to the sampling on-off assembly.

[0016] In the above scheme, the above arrangement is helpful to reduce the possibility of relative displacement between the first collection line and the confluence component caused by displacement of the sampling on-off component when subjected to external force, thereby improving the collection accuracy of the first collection line and improving the overall impact resistance of the battery device.

[0017] In some embodiments, the battery device further includes a control unit, which is electrically connected to the second acquisition line. The sampling on-off component further includes a connecting line, and the control unit communicates with the controller via the connecting line.

[0018] In the above scheme, when the control unit detects abnormal thermal runaway temperature information or abnormal voltage information, it sends a signal to the controller, and the controller controls the circuit breaker to disconnect the electrical connection between the first acquisition line and the second acquisition line, thereby reducing the possibility of short circuit between the acquisition line harnesses.

[0019] In some embodiments, a plurality of battery cells form a first battery cell group and a second battery cell group, each of the first battery cell group and the second battery cell group includes at least two battery cells, the sampling on-off assembly further includes a power line, and the controller in the first battery cell group is electrically connected to the battery cells in the second battery cell group through the power line. And / or the sampling on-off assembly further includes a power line, and the controller is electrically connected to an external power supply device through the power line.

[0020] In the above scheme, the power line can increase the power of the controller so that the controller can work normally. The power required by the controller is provided by other battery cell groups or by an external power supply device. When the battery cell thermal runaway occurs, the controller can work normally and control the circuit breaker to disconnect the electrical connection between the first acquisition line and the second acquisition line, thereby improving the reliability of the battery device.

[0021] In some embodiments, the circuit breaker includes a relay.

[0022] In the above scheme, the above arrangement is helpful to improve the application range of the circuit breaker, thereby improving the application range of the battery device.

[0023] In a second aspect, an embodiment of the present application provides an electrical device, including a battery device in any of the aforementioned embodiments, and the battery device is used to provide electrical energy.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of an exploded structure of a battery device provided in an embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of a battery module provided in an embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a battery device provided in an embodiment of the present application;

[0030] Figure 5 is a schematic cross-sectional structure diagram of a battery device provided in an embodiment of the present application;

[0031] Figure 6 yes Figure 4 Schematic diagram of the enlarged structure of P;

[0032] Figure 7 is a schematic cross-sectional structure diagram of another battery device provided in an embodiment of the present application;

[0033] Figure 8 is a structural schematic diagram of another battery device provided in an embodiment of the present application;

[0034] Fig. 9 It is a schematic diagram of the structure of another battery device provided in an embodiment of the present application.

[0035] Marking Description

[0036] 1000. Vehicles;

[0037] 100, battery device; 200, control system; 300, motor; 400, housing; 410, first housing portion; 420, second housing portion; 430, storage portion; 500, battery module; 600, external power supply device;

[0038] 10. Battery cell; 11. First electrode terminal; 12. Second electrode terminal;

[0039] 20. busbar component; 21. first sub-busbar component; 22. second sub-busbar component; 23. fuse part; 24. first part; 25. second part;

[0040] 30, sampling line bundle; 31, first acquisition line; 311, first sub-acquisition line; 312, second sub-acquisition line; 32, second acquisition line;

[0041] 40. Sampling on-off assembly; 41. Controller; 42. Circuit breaker; 43. Connecting wire;

[0042] 50. Isolation parts;

[0043] 60. Control unit;

[0044] G1, a first battery monomer group; G2, a second battery monomer group;

[0045] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it 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 meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0055] 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 storage battery, etc., which is not limited in the embodiments of the present application.

[0056] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0057] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0058] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0059] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0060] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0061] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0062] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0063] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0064] In the related art, the battery device includes multiple battery cells. During the use of the battery device, the voltage and temperature of each battery cell need to be monitored in real time through the sampling harness of the battery management system to improve the reliability of the battery device. However, when the sampling harness collects the voltage and temperature of the battery cell, the insulation sheath of the sampling harness may be damaged due to thermal runaway of the battery cell, resulting in a short circuit between adjacent sampling harnesses. As a result, there is a risk of ablation and fire due to a short circuit of the battery cell or the sampling harness, which reduces the reliability of the battery device.

[0065] Based on the above technical problems, the present application provides a technical solution. By setting a controller, when the collected information exceeds the threshold range, the controller can control the circuit breaker to disconnect, so that the first collection line and the second collection line are disconnected, thereby reducing the risk of short circuit between adjacent sampling harnesses due to damage to the insulation sheath of the sampling harness caused by thermal runaway of the battery cell, thereby improving the reliability of the battery device.

[0066] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric cars, ships, spacecraft, electric toys and electric tools, etc., wherein spacecrafts include airplanes, rockets, space shuttles and spacecrafts, etc., electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0067] The battery cells described in the embodiments of the present application are not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0068] See also Figure 1 , Figure 1 It is a structural schematic diagram of a vehicle provided in an embodiment of the present application.

[0069] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 may be provided inside the vehicle 1000, and specifically, for example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may further include a control system 200 and a motor 300, and the control system 200 is used, for example, to control the battery device to power the motor 300. The battery device may be used for starting and navigating the vehicle 1000, and of course, the battery device 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0070] Figure 2 Schematic diagram of the explosion structure of a battery device provided in an embodiment of the present application. Figure 2 As shown, the battery device 100 includes a box body 400 and a battery cell (not shown in the figure), and the battery cell is accommodated in the box body 400.

[0071] The box 400 is used to accommodate the battery cell, and the box 400 can be a variety of structures. In some embodiments, the box 400 may include a first box portion 410 and a second box portion 420, the first box portion 410 and the second box portion 420 cover each other, and the first box portion 410 and the second box portion 420 jointly define a receiving portion 430 for accommodating the battery cell. The second box portion 420 may be a hollow structure with one end open, the first box portion 410 is a plate-like structure, and the first box portion 410 covers the open side of the second box portion 420 to form a box with a receiving portion 430; the first box portion 410 and the second box portion 420 may also be a hollow structure with one side open, and the open side of the first box portion 410 covers the open side of the second box portion 420 to form a box 400 with a receiving portion 430. Of course, the first box portion 410 and the second box portion 420 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0072] In the battery device 100, there can be multiple battery cells. Multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in the box 400; of course, multiple battery cells can also be connected in series, in parallel, or in a mixed connection to form a battery module 500, and multiple battery modules 500 are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 400.

[0073] Figure 3 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0074] In some embodiments, Figure 3 As shown, there are multiple battery cells 10, and the multiple battery cells 10 are first connected in series, in parallel, or in mixed series to form a battery module 500. The multiple battery modules 500 are then connected in series, in parallel, or in mixed series to form a whole, and are accommodated in a box.

[0075] Figure 4 It is a structural schematic diagram of a battery device provided in an embodiment of the present application. Figure 5 It is a schematic diagram of the cross-sectional structure of a battery device provided in an embodiment of the present application.

[0076] See also Figure 4 and Figure 5The embodiment of the present application provides a battery device 100, which includes a plurality of battery cells 10, a plurality of current collectors 20, a sampling harness 30, and a sampling on-off assembly 40. The plurality of current collectors 20 electrically connect the plurality of battery cells 10. The sampling harness 30 includes a first acquisition line 31 and a second acquisition line 32, and the first acquisition line 31 is connected to the current collector 20. The sampling on-off assembly 40 includes a controller 41 and a circuit breaker 42, and the first acquisition line 31 and the second acquisition line 32 are electrically connected through the circuit breaker 42. The circuit breaker includes a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part. The controller controls the on-off of the third conductive part and at least one of the first conductive part and the second conductive part according to the collected information.

[0077] Optionally, the busbar component 20 may be made of a conductive material. For example, the busbar component 20 may be made of a metal material, such as aluminum or copper.

[0078] Optionally, the number of the busbar components 20 may include multiple busbar components 20, and the multiple battery cells 10 of the battery device 100 can be connected in series, in parallel, or in mixed connection.

[0079] As an example, a plurality of battery cells 10 are arranged in series, and the battery cells 10 include a positive electrode terminal and a negative electrode terminal, and the positive electrode terminal of one of the two adjacent battery cells 10 is electrically connected to the negative electrode terminal of the other battery cell 10 through the busbar 20. Optionally, the busbar 20 can also electrically connect two non-adjacent battery cells 10, for example, the busbar 20 electrically connects the first battery cell 10 and the Nth battery cell 10, and the busbar 20 spans N-2 battery cells 10.

[0080] The sampling harness 30 can transmit the collected information to the battery management system in the battery device 100, and the battery management system can control the battery device 100 according to the collected information. Optionally, the battery device 100 may also include a sampling circuit board, which is electrically connected to the first acquisition line 31, and the collection information collected by the second acquisition line 32 is transmitted to the sampling circuit board via the circuit breaker 42 and the first acquisition line 31. Optionally, the sampling circuit board may be a PCB (Printed Circuit Board) circuit board, and the sampling circuit board is provided with a circuit that can convert the collected information into an electrical signal and transmit it through the sampling harness 30.

[0081] Optionally, the sampling harness 30 may be a wire with a communication function, and the sampling harness 30 may include a conductor portion and an insulating layer surrounding the conductor portion. The conductor portion of the sampling harness 30 is electrically connected to the circuit breaker 42 to achieve signal transmission.

[0082] Optionally, the number of the first acquisition lines 31 and the number of the second acquisition lines 32 can be multiple, and the multiple first acquisition lines 31 and the multiple second acquisition lines 32 can be arranged in a one-to-one correspondence. Of course, the multiple second acquisition lines 32 can be connected to one first acquisition line 31.

[0083] Optionally, a sensor may be provided between the first collection line 31 and the confluence component 20 , and the first collection line 31 is electrically connected to the sensor. The sensor may collect information and transmit it through the first collection line 31 .

[0084] The first acquisition line 31 and the second acquisition line 32 are electrically connected through the circuit breaker 42. It can be understood that the circuit breaker 42 includes a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part. The conductor part in the first acquisition line 31 and the conductor part in the second acquisition line 32 are electrically connected to the first conductive part and the second conductive part respectively. The third conductive part can be disconnected from one of the first conductive part and the second conductive part under the control of the controller 41; or, the third conductive part is disconnected from both the first conductive part and the second conductive part under the control of the controller 41. It can be understood that when the controller receives the acquisition information of the preset threshold, the controller can control the on-off of the third conductive part and at least one of the first conductive part and the second conductive part by means of power on and off, mechanical movement, etc.

[0085] Optionally, the controller 41 may also control the circuit breaker 42 to switch from an off state to an on state. The off state is a state in which the first conductive part and the second conductive part are disconnected. The on state is a state in which the first conductive part and the second conductive part are electrically connected.

[0086] In the technical solution of the embodiment of the present application, by setting a controller 41, when the collected information exceeds the threshold range, the controller 41 can control the circuit breaker 42 to disconnect, so that the first collection line 31 and the second collection line 32 are disconnected, thereby reducing the risk of short circuit between adjacent sampling harnesses 30 due to damage to the insulation sheath of the sampling harness 30 caused by thermal runaway of the battery cell 10, thereby improving the reliability of the battery device 100.

[0087] Figure 6 yes Figure 4 Schematic diagram of the enlarged structure of P.

[0088] In some optional embodiments, see Figures 4 to 6The battery cell 10 includes a first electrode terminal 11 and a second electrode terminal 12, the busbar 20 includes a first sub-busbar 21 and a second sub-busbar 22, the first collection line 31 includes a first sub-collection line 311 and a second sub-collection line 312, the first electrode terminal 11 is electrically connected to the first sub-busbar 21, and the second electrode terminal 12 is electrically connected to the second sub-busbar 22. The first sub-collection line 311 and the second sub-collection line 312 are both connected to the same first sub-busbar 21.

[0089] Optionally, one of the first electrode terminal 11 and the second electrode terminal 12 is a positive electrode terminal, and the other is a negative electrode terminal.

[0090] Optionally, the first electrode terminal 11 and the second electrode terminal 12 are located on the same side of the battery cell 10 .

[0091] Optionally, a plurality of battery cells 10 may be arranged side by side along the first direction X, and the first electrode terminal 11 and the second electrode terminal 12 may be located at both ends of the battery cell 10 along the second direction Y. The first electrode terminal 11 of one of the two adjacent battery cells 10 and the second electrode terminal 12 of the other battery cell 10 are arranged adjacent to each other, so that one busbar 20 can connect the two battery cells 10 in series. The first sub-busbar 21 and the second sub-busbar 22 are respectively arranged at opposite ends of the battery device 100 along the second direction Y, and the first sub-busbar 21 and the second sub-busbar 22 may both be multiple, so as to connect the plurality of battery cells 10 in series. It is understood that one battery cell 10 may be electrically connected to one first sub-busbar 21 and one second sub-busbar 22.

[0092] It can be understood that when the first sub-collection line 311 and the second sub-collection line 312 collect the same information, the first sub-collection line 311 and the second sub-collection line 312 can be electrically connected to the same second collection line 32. For example, the number of second conductive parts in the circuit breaker 42 includes two, one of which is electrically connected to the first sub-collection line 311, the other second conductive part is electrically connected to the second sub-collection line 312, and both of the two second conductive parts are electrically connected to the third conductive part. Exemplarily, the first sub-collection line 311 and the second sub-collection line 312 both collect temperature. When the first sub-acquisition line 311 and the second sub-acquisition line 312 collect different types of information, the first sub-acquisition line 311 and the second sub-acquisition line 312 are connected to different second acquisition lines 32. For example, the second acquisition line 32 includes a third sub-acquisition line and a fourth sub-acquisition line. The sampling on-off component 40 includes a first component and a second component. The first sub-acquisition line 311 and the third sub-acquisition line are electrically connected through a circuit breaker 42 in the first component, and the second sub-acquisition line 312 and the fourth sub-acquisition line are electrically connected through a circuit breaker 42 in the second component.

[0093] Optionally, when the first sub-collection line 311 and the second sub-collection line 312 collect the same information, the first sub-collection line 311 and the second sub-collection line 312 may also be connected to different second collection lines 32. Optionally, the first sub-collection line 311 may be in a conducting state with the third sub-collection line, and the second sub-collection line 312 and the fourth sub-collection line may be in a disconnected state. When there is a problem with the conduction between the first sub-collection line 311 and the third sub-collection line, the controller 41 in the first component controls the circuit breaker 42 to be disconnected, and the control circuit breaker 42 in the second component is turned on, so that the second sub-collection line 312 and the fourth sub-collection line are in a conducting state, so that the second sub-collection line 312 is used as a backup collection line, thereby improving the reliability of the battery device 100.

[0094] In some examples, the first sub-collection line 311 and the second sub-collection line 312 are both connected to the same first sub-collection component 21, and the first sub-collection line 311 and the second sub-collection line 312 collect different information so that the battery management system in the battery device 100 can control the battery device 100 through multiple information.

[0095] In some examples, the first sub-collection line 311 and the second sub-collection line 312 are both connected to the second sub-bus component 22. In other examples, the first sub-collection line 311 is connected to the second sub-bus component 22. In other examples, the second sub-collection line 312 is connected to the second sub-bus component 22.

[0096] In these optional embodiments, by setting the first sub-collection line 311 and the second sub-collection line 312, when the first sub-collection line 311 and the second sub-collection line 312 collect different information, multiple information on the battery cell 10 can be collected, so as to improve the battery management system in the battery device 100 to control the battery device 100 through multiple information; when the first sub-collection line 311 and the second sub-collection line 312 collect the same information, when one of the first sub-collection line 311 and the second sub-collection line 312 fails, the other can still be used, thereby reducing the maintenance cost of the battery device 100 and improving the reliability of the battery device 100.

[0097] In some optional embodiments, see Figures 4 to 6 The number of the first sub-collection lines 311 includes a plurality of lines, and the plurality of first sub-collection lines 311 are respectively connected to the first sub-collection component 21 and the second sub-collection component 22 to reduce the number of arranged sampling harnesses 30 , thereby reducing the manufacturing cost of the battery device 100 .

[0098] Exemplarily, the number of the plurality of first sub-collection lines 311 is equal to the sum of the number of the first sub-collection parts 21 and the number of the second sub-collection parts 22. For example, the number of the first sub-collection lines 311 includes j, the number of the first sub-collection parts 21 includes M, the number of the second sub-collection parts 22 includes N, and M+N equals j. In other words, a portion of the plurality of first sub-collection lines 311 is arranged in a one-to-one correspondence with the plurality of first sub-collection parts 21, and another portion of the plurality of first sub-collection lines 311 is arranged in a one-to-one correspondence with the plurality of second sub-collection parts 22.

[0099] In some optional embodiments, the collected information of one of the first sub-collection line 311 and the second sub-collection line 312 includes voltage, and the collected information of the other includes temperature.

[0100] For example, the collected information of the first sub-collection line 311 includes voltage, and the collected information of the second sub-collection line 312 includes temperature.

[0101] Exemplarily, for a battery cell 10, a battery cell 10 is electrically connected to a first sub-bus component 21 and a second sub-bus component 22, respectively, two first sub-collection lines 311 are connected to the first sub-bus component 21 and the second sub-bus component 22, respectively, and a second sub-collection line 312 is connected to a first sub-bus component 21, so that the temperature information of each battery cell 10 is collected by a second sub-collection line 312, and the voltage of one end of each battery cell 10 close to the first electrode terminal 11 and the voltage of one end close to the second electrode terminal 12 are collected by the two first sub-collection lines 311, respectively, thereby reducing the redundant setting of the collection harness, reducing the possibility of the battery cell 10 failing due to abnormal voltage at one end of the two ends of the battery cell 10, improving the accuracy of the fault analysis of the battery cell 10, and further improving the reliability of the battery cell 10.

[0102] In the embodiment of the present application, by collecting voltage information and temperature information, the battery cell 10 can be detected from multiple aspects, thereby reducing the possibility that the insulation layer of the sampling harness 30 is damaged after the battery cell 10 has thermal runaway, resulting in a short circuit of adjacent sampling harnesses 30.

[0103] In some optional embodiments, see Figures 4 to 6 The collected information of the first sub-collection line includes voltage, the collected information of the second sub-collection line 312 includes temperature, the busbar component 20 includes a fuse part 23, and the second sub-collection line 312 is connected to the fuse part 23.

[0104] It can be understood that since the current carrying capacity of the fuse part 23 of the busbar component 20 is smaller than the current carrying capacity of other areas of the busbar component 20, the temperature rise rate of the fuse part 23 of the busbar component 20 is faster than the temperature rise rate of other areas of the busbar component 20. When the battery cell 10 fails, the current in the busbar component 20 increases, and the temperature rise of the busbar component 20 is more obvious. The second sub-collection line 312 is connected to the fuse part 23, so that the second sub-collection line 312 can collect temperature information on the fuse part 23, thereby improving the accuracy and timeliness of the collected information, reducing the possibility of a failed battery cell affecting surrounding battery cells, and improving the reliability of the battery device.

[0105] Optionally, the busbar component 20 may include a first part 24 and a second part 25, the first part 24 and the second part 25 are connected by the fuse part 23, the first part 24 and the second part 25 are respectively electrically connected to the electrode terminals on the two battery cells 10, when the busbar component 20 connects the two battery cells 10 in series, the first part 24 is electrically connected to the first electrode terminal 11 on one battery cell 10, the second part 25 is electrically connected to the second electrode terminal 12 on the other battery cell 10, and the two first sub-collection lines 311 connected to one battery cell 10 are respectively connected to the second part 25 of the first sub-busbar component 21 and the second part 25 of the second sub-busbar component 22.

[0106] Figure 7 It is a schematic cross-sectional structure diagram of another battery device provided in an embodiment of the present application.

[0107] In some optional embodiments, see Figure 4 and Figure 5 as well as Figure 7 The battery device 100 further includes an isolating member 50 , which is located between the sampling harness 30 and the battery cell 10 , and one of the isolating member 50 and the confluence member 20 is fixedly connected to the sampling on-off assembly 40 .

[0108] Optionally, the material of the isolation member 50 may include an insulating material, and the isolation member 50 may separate the battery cell 10 from the sampling harness 30 , thereby reducing the possibility of a short circuit between the battery cell 10 and the sampling harness 30 .

[0109] Optionally, the material of the isolation member 50 may also include a heat insulating material. The isolation member 50 may reduce the temperature transmitted from the battery cell 10 to the sampling harness 30 , thereby reducing the possibility of melting the insulation layer of the sampling harness 30 and increasing the service life of the sampling harness 30 .

[0110] In some embodiments, Figure 7As shown, the sampling on-off assembly 40 is fixed on the isolation member 50. Optionally, the sampling on-off assembly 40 can be fixedly connected by screwing, riveting, clamping, bonding, etc.

[0111] In other embodiments, Figure 5 As shown, the sampling on-off assembly 40 is fixed on the busbar component 20. Optionally, the sampling on-off assembly 40 can be fixed on a side of the busbar component 20 that is away from the battery cell 10.

[0112] In the embodiment of the present application, the above arrangement is helpful to reduce the possibility of relative displacement between the first collection line 31 and the confluence component 20 caused by displacement of the sampling on-off assembly 40 when subjected to external force, thereby improving the collection accuracy of the first collection line 31 and improving the overall impact resistance of the battery device 100.

[0113] In some optional embodiments, see Figure 4 , Figure 5 as well as Figure 7 The battery device 100 further includes a control unit 60 , which is electrically connected to the second acquisition line 32 . The sampling on-off component 40 further includes a connecting line 43 , through which the control unit 60 communicates with the controller 41 .

[0114] Optionally, the control unit 60 may include a battery management system.

[0115] In the embodiment of the present application, when the control unit 60 detects abnormal thermal runaway temperature information or abnormal voltage information, it sends a signal to the controller 41, and the controller controls the circuit breaker 42 to disconnect the electrical connection between the first acquisition line 31 and the second acquisition line 32, thereby reducing the possibility of short circuit between the acquisition line harnesses.

[0116] Optionally, the temperature information abnormality may include a temperature value exceeding a preset range or an abnormal temperature rise.

[0117] Optionally, the voltage information abnormality may include a voltage value being lower than a preset range.

[0118] Figure 8 It is a structural schematic diagram of another battery device provided in an embodiment of the present application. Fig. 9 It is a schematic diagram of the structure of another battery device provided in an embodiment of the present application.

[0119] In some optional embodiments, see Figure 8 and Fig. 9, a plurality of battery cells 10 form a first battery cell group G1 and a second battery cell group G2, each of the first battery cell group G1 and the second battery cell group G2 includes at least two battery cells 10, the sampling on-off assembly 40 also includes a power line, and the controller 41 in the first battery cell group G1 is electrically connected to the battery cells 10 in the second battery cell group G2 through the power line. And / or the sampling on-off assembly 40 also includes a power line, and the controller 41 is electrically connected to the external power supply device 600 through the power line.

[0120] Optionally, the first battery cell group G1 and the second battery cell group G2 may each include a plurality of battery cells 10 , and the number of battery cells in the first battery cell group G1 and the number of battery cells in the second battery cell group G2 may be the same or different.

[0121] In some examples, the controller 41 in the first battery cell group G1 is electrically connected to the battery cell 10 in the second battery cell group through a power line. In other examples, the controller 41 is electrically connected to the external power supply device 600 through a power line. In other examples, the controller 41 in the first battery cell group G1 is electrically connected to the battery cell 10 in the second battery cell group through a power line, and the controller 41 is electrically connected to the external power supply device 600 through a power line.

[0122] The controller 41 in the first battery cell group G1 is electrically connected to the battery cells 10 in the second battery cell group G2 via a power line. It can be understood that the controller 41 in one battery cell 10 group is powered by other battery cell 10 groups to ensure that the controller 41 can work normally.

[0123] Optionally, the external power supply device 600 may include a backup power supply.

[0124] In the embodiment of the present application, the power line can increase the power of the controller 41 so that the controller 41 can work normally. The power required by the controller 41 is provided by other battery cell 10 groups or by an external power supply device 600. When the battery cell 10 thermally runs away, the controller 41 can work normally and control the circuit breaker 42 to disconnect the electrical connection between the first acquisition line 31 and the second acquisition line 32, thereby improving the reliability of the battery device 100.

[0125] In some alternative embodiments, the circuit breaker 42 includes a relay.

[0126] Optionally, when the circuit breaker 42 includes a relay, the relay may include an electromagnet, a pair of contacts, and a conductive structure. Specifically, the controller 41 supplies power to the electromagnet, and the two contacts electrically connect the first acquisition line 31 and the second acquisition line 32. When the controller 41 detects that the acquisition information is abnormal, the controller 41 energizes the electromagnet, and the electromagnet attracts the conductive structure, thereby driving the contact to move. Due to the movement of the contact, the circuit originally controlled by the contact will change, so that the contact opens, thereby disconnecting the first acquisition line 31 and the second acquisition line 32. Optionally, the circuit breaker 42 also includes a reset function, that is, the circuit breaker 42 can be reused. After troubleshooting and returning to normal, the controller 41 stops supplying power to the electromagnet, so that the conductive structure returns to its original position, thereby returning the contact to its original state, so that the first acquisition line 31 and the second acquisition line 32 are connected.

[0127] Optionally, the circuit breaker may further include an intelligent fuse. Specifically, when the current provided by the controller 41 to the intelligent fuse exceeds a preset value, the fuse inside the intelligent fuse generates heat due to the passage of current. As the heat accumulates, the temperature of the fuse gradually increases. When it reaches the melting point, the fuse will melt, thereby cutting off the electrical connection between the first acquisition line 31 and the second acquisition line 32. Optionally, the intelligent fuse may have a resettable function, that is, the intelligent fuse can be reused. After troubleshooting and returning to normal, the fuse in the intelligent fuse can be reused after recovery, thereby reducing temperature costs.

[0128] In these optional embodiments, the above configuration is helpful to improve the application range of the circuit breaker 42, thereby improving the application range of the battery device 100.

[0129] In a second aspect, an embodiment of the present application provides an electrical device, including the battery device 100 in any of the aforementioned embodiments, and the battery device is used to provide electrical energy.

[0130] According to some embodiments of the present application, please refer to Figures 4 to 9 The battery device 100 includes a plurality of battery cells 10, a plurality of current collecting components 20, a sampling harness 30, and a sampling on-off assembly 40. The plurality of current collecting components 20 electrically connect the plurality of battery cells 10; the sampling harness 30 includes a first acquisition line 31 and a second acquisition line 32, and the first acquisition line 31 is connected to the current collecting component 20; the sampling on-off assembly 40 includes a controller 41 and a circuit breaker 42, and the first acquisition line 31 and the second acquisition line 32 are electrically connected through the circuit breaker 42, and the circuit breaker includes a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part, and the controller controls the on-off of the third conductive part and at least one of the first conductive part and the second conductive part according to the collected information.

[0131] The battery cell 10 includes a first electrode terminal 11 and a second electrode terminal 12, the busbar 20 includes a first sub-busbar 21 and a second sub-busbar 22, the first acquisition line 31 includes a first sub-acquisition line 311 and a second sub-acquisition line 312, the first electrode terminal 11 is electrically connected to the first sub-busbar 21, and the second electrode terminal 12 is electrically connected to the second sub-busbar 22; wherein the first sub-acquisition line 311 and the second sub-acquisition line 312 are both connected to the same first sub-busbar 21. The first sub-acquisition line 311 is connected to the second sub-busbar 22. The acquisition information of the first sub-acquisition line 311 includes voltage, and the acquisition information of the second sub-acquisition line 312 includes temperature. The second sub-acquisition line 312 includes temperature, the busbar 20 includes a fuse 23, and the second acquisition line 32 is connected to the fuse 23. The busbar is fixedly connected to the sampling on-off assembly 40.

[0132] The battery device 100 further includes a control unit 60 , which is electrically connected to the second acquisition line 32 . The sampling on-off component 40 further includes a connecting line 43 , and the control unit 60 communicates with the controller 41 via the connecting line 43 .

[0133] A plurality of battery cells 10 form a first battery cell group G1 and a second battery cell group G2, each of the first battery cell group G1 and the second battery cell group G2 includes at least two battery cells 10, the sampling on-off assembly 40 further includes a power line, and the controller 41 in the first battery cell group G1 is electrically connected to the battery cells 10 in the second battery cell group through the power line; and / or, the sampling on-off assembly 40 further includes a power line, and the controller 41 is electrically connected to the external power supply device 600 through the power line. The circuit breaker 42 includes a relay.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Multiple battery cells; A plurality of busbars electrically connecting the plurality of battery cells; Control unit; A sampling wire harness, comprising a first sampling wire and a second sampling wire, wherein the first sampling wire is connected to the confluence component, and the second sampling wire is connected to the control unit; A sampling on-off component, comprising a controller and a circuit breaker, wherein the first acquisition line and the second acquisition line are electrically connected through the circuit breaker, and the circuit breaker comprises a first conductive part, a second conductive part, and a third conductive part for electrically connecting the first conductive part and the second conductive part, wherein the first conductive part is connected to the first acquisition line, and the second conductive part is connected to the second acquisition line, and the controller controls the on-off of the third conductive part and at least one of the first conductive part and the second conductive part according to the acquisition information; The circuit breaker includes an off state and an on state, the off state is a state in which the first conductive part and the second conductive part are disconnected; the on state is a state in which the first conductive part and the second conductive part are electrically connected, and the controller controls the circuit breaker to switch between the off state and the on state.

2. The battery device according to claim 1, characterized in that: The first acquisition line includes a first sub-acquisition line and a second sub-acquisition line, the second acquisition line includes a third sub-acquisition line and a fourth sub-acquisition line, the sampling on-off component includes a first component and a second component, the first sub-acquisition line and the third sub-acquisition line are electrically connected through the circuit breaker in the first component, and the second sub-acquisition line and the fourth sub-acquisition line are electrically connected through the circuit breaker in the second component.

3. The battery device according to claim 2, characterized in that: The battery cell includes a first electrode terminal and a second electrode terminal, the busbar includes a first sub-busbar and a second sub-busbar, the first collection line includes a first sub-collection line and a second sub-collection line, the first electrode terminal is electrically connected to the first sub-busbar, and the second electrode terminal is electrically connected to the second sub-busbar; The first sub-collecting line electrically connected to the third sub-collecting line and the second sub-collecting line electrically connected to the fourth sub-collecting line are both connected to the same first sub-bus component.

4. The battery device according to claim 3, characterized in that: The number of the first sub-collecting lines includes a plurality, the first sub-bus components include a plurality, the second sub-bus components include a plurality, a portion of the plurality of the first sub-collecting lines is connected to the plurality of the first sub-bus components in a one-to-one correspondence, and another portion of the plurality of the first sub-collecting lines is connected to the plurality of the second sub-bus components in a one-to-one correspondence.

5. The battery device according to claim 2, characterized in that: The collected information of one of the first sub-collection line and the second sub-collection line includes voltage, and the collected information of the other sub-collection line includes temperature.

6. The battery device according to claim 2, characterized in that: The information collected by the first sub-collection line includes voltage, the information collected by the second sub-collection line includes temperature, the current collection component includes a fuse, and the second sub-collection line is connected to the fuse.

7. The battery device according to claim 1, characterized in that: The battery device further includes an isolating member, the isolating member being located between the sampling harness and the battery cell, and one of the isolating member and the converging member being fixedly connected to the sampling on-off assembly.

8. The battery device according to claim 1, characterized in that: The sampling on-off component also includes a connecting line, and the control unit communicates with the controller through the connecting line.

9. The battery device according to claim 1, characterized in that: The plurality of battery cells form a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group each include at least two battery cells, the sampling on-off assembly further includes a power line, the controller in the first battery cell group is electrically connected to the battery cells in the second battery cell group via the power line; and / or, The sampling on-off component also includes a power line, and the controller is electrically connected to an external power supply device through the power line.

10. The battery device according to claim 1, characterized in that: The circuit breaker includes a relay or an intelligent fuse.

11. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 10, wherein the battery device is used to provide electrical energy.

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