Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and relates to the technical field of batteries. The battery device comprises a battery box body, a battery monomer and a protection assembly, wherein the battery box body is provided with an accommodating space; the battery monomers are accommodated in the accommodating space; the protection assembly comprises a first protection plate and a detection unit, the first protection plate is connected to the side, away from the containing space, of the plate body, the detection unit is installed between the plate body and the first protection plate, and the detection unit comprises a first connecting piece, a plurality of second connecting pieces and a plurality of pressure detection pieces. The pressure detection pieces on the multiple second connecting pieces of the detection unit form the detection array, the bottom pressure and invasion conditions of the battery device are obtained through detection of the detection array, the use risk of the battery device is evaluated, the possibility of potential safety hazards caused by continuous use of the battery device due to overlarge pressure of the protection assembly is reduced, and the use safety of the battery device is improved. And the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the development of battery technology, improving the reliability of battery devices is a key research direction. Utility Model Content

[0004] This application provides a battery device and an electrical appliance that can improve the reliability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery housing, a battery cell, and a protective assembly. The battery housing includes a frame and a plate, the plate covering an opening on one side of the frame, the frame and the plate forming an accommodating space; the battery cell is accommodated in the accommodating space; the protective assembly includes a first protective plate and a detection unit, the first protective plate being connected to the side of the plate away from the accommodating space, the detection unit being installed between the plate and the first protective plate, the detection unit including a first connector, a plurality of second connectors, and a plurality of pressure detection elements, the plurality of second connectors being spaced apart on the first connector along the length direction of the first connector, the length direction of the second connectors intersecting the length direction of the first connector, and at least one pressure detection element being installed on each second connector.

[0006] By adopting the above technical solution, the protective component is configured to have a detection unit. The pressure detection elements on the multiple second connectors of the detection unit form a detection array. The pressure on the protective component can be detected through the detection array, thereby obtaining the pressure and intrusion status of the bottom of the battery device, assessing the use risk of the battery device, reducing the possibility of the protective component being under excessive pressure and the battery device continuing to be used, which may cause safety hazards, and improving the reliability of the battery device.

[0007] In some embodiments of this application, each of the second connectors is electrically connected to the pressure sensing element thereon, the plurality of second connectors are electrically connected to the first connector respectively, and the first connector is configured to receive and output the pressure sensing signal of the pressure sensing element.

[0008] By adopting the above technical solution, the pressure detection element, the second connector and the first connector are electrically connected in sequence, so that the first connector can receive and output the detection signal of the pressure detection element, which makes it convenient to know the pressure status of the protective component.

[0009] In some embodiments of this application, the first connector and / or the second connector is a circuit board.

[0010] By adopting the above technical solution, the first connector is designed as a circuit board, which not only fits the shape of the first protective plate and is easy to install, but also the interface on the circuit board is convenient for the assembly of the pressure sensor; the second connector is designed as a circuit board, which facilitates the first connector to connect to the receiving structure used to receive the detection signal transmitted by the first connector.

[0011] In some embodiments of this application, the circuit board is a flexible circuit board.

[0012] By adopting the above technical solution, the flexible circuit board can better fit the bottom of the first protective plate and provide feedback on the pressure of the first protective plate. Moreover, compared with the rigid plate, it has better vibration and impact resistance and better reliability.

[0013] In some embodiments of this application, the first connector includes a connecting portion and an output portion. The connecting portion is electrically connected to the output portion and the plurality of second connectors, respectively. The output portion passes through the plate and is used to output the pressure detection signal of the pressure detection element to the outside.

[0014] Using the above technical solution, the first connector is designed to include a connecting part and an output part. The output part passes through the plate body, which facilitates the first connector to output pressure detection signals to the outside.

[0015] In some embodiments of this application, the battery device further includes a battery management system, the output portion being electrically connected to the battery management system and used to output the pressure detection signal to the battery management system.

[0016] By adopting the above technical solution, the battery management system directly receives pressure detection signals to monitor the pressure status of the protective components. This not only provides a rapid response and can issue an early warning when the pressure on the protective components exceeds the threshold, but also eliminates the need for additional early warning or control devices, thus simplifying the battery device structure.

[0017] In some embodiments of this application, the first connector and the second connector are circuit boards, and the battery management system is configured to detect the resistance of the first connector and the resistance of the second connector, and determine whether the first connector and the second connector are broken based on the detected resistance.

[0018] By adopting the above technical solution, the resistance of the circuit board itself is used as a sensing structure. The risk of structural failure of the protective component can be warned by whether the circuit has a physical break. This not only enhances the fault detection capability of the battery device and improves its reliability, but also eliminates the need for additional sensors and reduces detection costs.

[0019] In some embodiments of this application, the battery device further includes a heat exchanger mounted on the plate and located within the receiving space, a battery management system mounted on the heat exchanger, and an output portion passing through the heat exchanger and electrically connected to the battery management system.

[0020] Using the above technical solution, the heat exchanger can be used to cool the battery management system and individual battery cells, while the output part passes through the heat exchanger to facilitate the connection of the first connector to the battery management system located on the heat exchanger.

[0021] In some embodiments of this application, the detection unit further includes a third connector and at least one temperature sensor, wherein the third connector is connected to the first connector and the temperature sensor is mounted on the third connector.

[0022] By adopting the above technical solution, the temperature of the protective component is detected by a temperature detection device, and the temperature information of the protective component is obtained, thereby reducing the possibility of safety risks caused by the protective component being too hot.

[0023] In some embodiments of this application, the third connector is electrically connected to the temperature sensing element thereon, and the third connector is electrically connected to the first connector, the first connector being configured to receive and output the temperature sensing signal of the temperature sensing element.

[0024] By adopting the above technical solution, the temperature detection element, the second connector, and the first connector are electrically connected in sequence, so that the first connector can receive and output the detection signal of the temperature detection element, making it convenient to know the temperature status of the protective component.

[0025] In some embodiments of this application, the third connector is located between two adjacent second connectors along the length direction of the first connector.

[0026] By using the above technical solution, the temperature detection element is placed between two adjacent pressure detection modules, which can determine whether the abnormal pressure of the protective component is accompanied by an increase in temperature, thereby providing a more comprehensive understanding of the pressure and temperature rise status of the protective component.

[0027] In some embodiments of this application, the protective component further includes a second protective plate connected to the side of the first protective plate facing the plate body, and the detection unit is connected between the first protective plate and the second protective plate.

[0028] By adopting the above technical solution, the detection unit is placed between the first protective plate and the second protective plate. The first protective plate and the second protective plate form a sandwich layer that can protect the detection unit, thereby improving the stability of the detection unit and thus improving the accuracy of the detection.

[0029] In some embodiments of this application, the protective component further includes a third protective plate, which is installed between the first protective plate and the second protective plate, and the detection unit is installed between the first protective plate and the third protective plate.

[0030] By adopting the above technical solution, not only is the second protective plate, battery box and battery cell protected against puncture by the third protective plate, but the detection unit is also installed between the first protective plate and the third protective plate, which will not affect the detection unit's direct feedback on the pressure and impact changes of the first protective plate.

[0031] In some embodiments of this application, the third guard plate has a first receiving groove on the side facing the first guard plate, and the detection unit is installed in the first receiving groove.

[0032] By adopting the above technical solution, the detection unit is placed in the first receiving groove on the surface of the third protective plate, thereby reducing the overall thickness of the protective component and reducing the impact of the configuration of the detection unit on the overall height of the battery device.

[0033] In some embodiments of this application, the number of pressure detection elements on each of the second connectors is multiple, and the multiple pressure detection elements are arranged at intervals along the length direction of the second connector.

[0034] By adopting the above technical solution, multiple pressure detection components can increase the area for pressure detection of the protective components, thereby improving the comprehensiveness of the detection.

[0035] In some embodiments of this application, the spacing between two adjacent pressure sensing elements located on the same second connector ranges from 150 mm to 450 mm.

[0036] By adopting the above technical solution, both the scope of pressure detection and production costs can be balanced.

[0037] In some embodiments of this application, the minimum distance between two adjacent second connectors along the length direction of the first connector is 100mm to 300mm.

[0038] By adopting the above technical solution, both the scope of pressure detection and production costs can be balanced.

[0039] In some embodiments of this application, the length direction of the second connector is arranged along the length direction of the first guard plate.

[0040] By adopting the above technical solution, a larger area of ​​the battery device under pressure can be detected.

[0041] Secondly, embodiments of this application provide an electrical device including a battery device as described in any of the above technical solutions, wherein the battery device is used to store electrical energy or provide electrical energy. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0043] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0044] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0045] Figure 3 Perspective views of the battery housing structure provided in some embodiments of this application;

[0046] Figure 4 This is a top view of a portion of the battery housing structure provided in some embodiments of this application;

[0047] Figure 5 for Figure 4 AA section diagram;

[0048] Figure 6 for Figure 5 Enlarged view of part b;

[0049] Figure 7 Exploded views of protective components provided in some embodiments of this application;

[0050] Figure 8 This is a schematic diagram of the structure of a detection unit provided in some embodiments of this application from one viewpoint;

[0051] Figure 9 This is a schematic diagram of the detection unit provided in some embodiments of this application from another perspective;

[0052] Figure 10This is a schematic diagram of the electrical connection between the battery management system and the detection unit provided in some embodiments of this application.

[0053] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0054] 1000, vehicles;

[0055] 100. Battery device;

[0056] 10. Battery housing; 11. First housing; 12. Second housing; 121. Frame; 122. Panel; 123. Storage space;

[0057] 20. Battery cell;

[0058] 30. Protective component; 31. First protective plate; 32. Detection unit; 321. First connector; 3211. Connecting part; 3212. Output part; 322. Second connector; 323. Pressure detection component; 324. Third connector; 325. Temperature detection component; 33. Second protective plate; 34. Third protective plate; 341. First receiving groove;

[0059] 40. Heat exchanger components;

[0060] 50. Battery Management System;

[0061] 200. Controller;

[0062] 300. Motor. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0065] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, H and / or B can represent: H existing alone, H and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0069] In this application, "multiple" means two or more (including two).

[0070] A battery pack typically consists of a battery casing and individual battery cells located within it. To improve the overall structural stability of the battery pack, a protective component is usually installed at the bottom of the battery casing. This protective component effectively protects against external disturbances such as impacts from gravel during daily driving, enhancing the internal safety performance of the battery pack.

[0071] However, because the protective components are located at the lowest point of the vehicle chassis, they are prone to cracking under bottom intrusion conditions such as bottoming out or scratching. Once cracked, they are difficult to identify or detect, causing phenomena such as sealing failure of the battery device, electrolyte leakage, and insulation withstand voltage failure. In severe cases, this can lead to battery device fire and explosion.

[0072] Therefore, how to identify and detect bottom intrusion problems in protective components is an important issue in the research and development of battery devices and related components.

[0073] In view of this, this application provides a technical solution that solves the above-mentioned technical problem by configuring a detection device inside the protective component to detect the pressure of the protective component and to determine whether the protective component has experienced bottom intrusion.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0075] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0076] Combined with appendix Figure 1 As shown, a battery device 100 is provided inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0077] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0078] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Combined with appendix Figure 2-7 As shown, this application embodiment provides a battery device 100, including a battery housing 10, a battery cell 20, and a protective assembly 30. The battery housing 10 includes a frame 121 and a plate 122. The plate 122 covers one side opening of the frame 121, and the frame 121 and the plate 122 enclose a receiving space 123. The battery cell 20 is received in the receiving space 123. The protective assembly 30 includes a first protective plate 31 and a detection unit 32. The first protective plate 31 is connected to the side of the plate 122 away from the receiving space 123. The detection unit 32 is installed between the plate 122 and the first protective plate 31. The detection unit 32 includes a first connector 321, a plurality of second connectors 322, and a plurality of pressure detection elements 323. The plurality of second connectors 322 are spaced apart on the first connector 321 along the length direction of the first connector 321. The length direction of the second connectors 322 intersects the length direction of the first connector 321. At least one pressure detection element 323 is installed on each second connector 322.

[0080] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0081] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0082] In some embodiments, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the battery housing 10 by fixing the battery module in the battery housing 10.

[0083] In some embodiments, the battery cell assembly may also be housed in the battery housing 10 by directly fixing multiple battery cells 20 to the battery housing 10.

[0084] In some embodiments, the battery housing 10 may include a cover, a frame 121, and a plate 122. The cover and the plate 122 are respectively connected to the frame 121, so that the interior of the battery housing 10 forms a closed space to accommodate the battery cells 20.

[0085] The battery housing 10 includes Figure 2 Taking the first box 11 and the second box 12 as an example, the first box 11 is a cover, and the second box 12 includes a frame 121 and a plate 122.

[0086] As an example, the battery housing 10 can be part of the chassis structure of the vehicle 1000. For example, the cover of the battery housing 10 can be at least part of the floor of the vehicle 1000, or the frame 121 of the battery housing 10 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0087] The battery cell 20 in this embodiment can be a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this application embodiment is not limited in this regard. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited in this regard either.

[0088] In this embodiment, the protective component 30 is connected to the side of the plate 122 away from the receiving space 123. For example, the protective component 30 is located on the lower side of the plate 122.

[0089] The protective component 30 includes a first protective plate 31, which can be a flat plate structure or a stamped plate structure with a recess. Similarly, the second protective plate 33 and the third protective plate 34 described below are also like this.

[0090] In order to detect the pressure condition of the protective component 30, the protective component 30 in this embodiment also includes a detection unit 32, which is located between the plate 122 and the first protective plate 31.

[0091] The detection unit 32 includes a first connector 321, a plurality of second connectors 322, and a plurality of pressure detection elements 323. The plurality of second connectors 322 are spaced apart on the first connector 321 along the length direction of the first connector 321, and the length direction of the second connectors 322 intersects with the first connector 321, for example, the two can be perpendicular or approximately perpendicular to each other.

[0092] Each second connector 322 is equipped with one or more pressure detection elements 323. The second connector 322 is used to install the pressure detection elements 323, and the first connector 321 is used to indirectly connect multiple second connectors 322 into a single unit. Of course, in addition to the connection function, the second connectors 322 and the first connectors 321 can also be designed to have electrical conductivity and data transmission functions, as described below.

[0093] The pressure detection element 323 can be a pressure sensor, such as a capacitive pressure sensor, a piezoelectric pressure sensor, a piezoresistive pressure sensor, etc., which will not be listed in detail in this embodiment.

[0094] The pressure detection elements 323 on the multiple second connectors 322 form a pressure detection array, and each pressure detection element 323 can perform pressure detection on a portion of the area between the first guard plate 31 and the base plate.

[0095] The pressure detection signal can be transmitted wirelessly or via line to the battery management system 50 of the battery device 100, or wirelessly or via line to the electrical device. When the pressure reaches a certain threshold, the battery management system 50 or the electrical device can display or issue a warning, so that the user can be informed of the pressure and intrusion status of the bottom of the battery device 100, assess the usage risk of the battery device 100, reduce the possibility of the protective component 30 being under excessive pressure and the battery device 100 continuing to be used, thus causing safety hazards and improving the reliability of the battery device 100.

[0096] In some examples, each second connector 322 is optionally electrically connected to a pressure sensor 323 thereon, and multiple second connectors 322 are electrically connected to a first connector 321, and the first connector 321 is configured to receive and output the detection signal of the pressure sensor 323.

[0097] A conductive connection refers to a connection between two things via a circuit, where the two things can conduct electricity and transmit electrical signals.

[0098] The pressure detection element 323 is electrically connected to the second connector 322, so that the pressure signal detected by the pressure detection element 323 is transmitted to the second connector 322 through current, voltage or digital signal.

[0099] Then, the signal is collected by the second connector 322 and sent to the first connector 321, so that the pressure signal detected by the pressure detection element 323 is transmitted to the outside through the current, voltage or digital signal of the first connector 321, thereby displaying the pressure or issuing an early warning.

[0100] In this embodiment, the pressure detection element 323, the second connector 322, and the first connector 321 are electrically connected in sequence, so that the first connector 321 can receive and output the detection signal of the pressure detection element 323, which makes it easy to know the pressure status of the bottom of the battery box 10.

[0101] In some examples, the first connector 321 and / or the second connector 322 may optionally be a circuit board.

[0102] The above technical solutions include three implementation methods. One method involves the first connector 321 being a circuit board, and the second connector 322 being a structure other than the circuit board that can conduct electricity and transmit signals. Another method involves the first connector 321 being a structure other than the circuit board that can conduct electricity and transmit signals, and the second connector 322 being a circuit board. A third method involves both the first connector 321 and the second connector 322 being circuit boards.

[0103] The circuit board's plate-like structure not only fits the shape of the first protective plate, facilitating installation, but also the interfaces on the circuit board make it easy to assemble the pressure sensor.

[0104] Furthermore, the second connector 322 is designed as a circuit board, which facilitates the first connector 321 to connect to the receiving structure used to receive the detection signal transmitted by the first connector 321.

[0105] Of course, neither the first connector 321 nor the second connector 322 can be a circuit board. For example, both can include an insulating part of the main body and wires mounted on the insulating part. The wires are used to realize the transmission of current and signals, and the signals detected by the pressure sensor can also be output to the outside through the second connector 322 and the first connector 321.

[0106] In some examples, the circuit board may optionally be a flexible circuit board.

[0107] That is, both the first connector 321 and the second connector 322 can be flexible circuit boards. A flexible circuit board refers to a printed circuit board made of a flexible insulating substrate, which has the characteristic of being bendable and foldable. In some embodiments, the flexible circuit board includes a flexible dielectric layer, a conductive layer, and a cover layer.

[0108] The flexible circuit board can better fit the bottom of the first protective plate 31 and provide feedback on the pressure applied to the first protective plate 31.

[0109] Moreover, when subjected to vibration and impact, flexible circuit boards can deform to absorb vibration and impact compared to rigid boards, resulting in better reliability.

[0110] In some examples, the first connector 321 may optionally include a connecting portion 3211 and an output portion 3212. The connecting portion 3211 is electrically connected to the output portion 3212 and a plurality of second connectors 322, respectively. The output portion 3212 passes through the plate 122 and is used to output the pressure detection signal of the pressure detection element 323.

[0111] The connecting part 3211 can be connected to one end of the second connector 322 and is used to receive the pressure detection signal transmitted from each of the second connectors 322.

[0112] The output section 3212 is used to dock the connection section 3211 and the structure outside the protective component 30 (such as the battery management system 50 or the vehicle 1000), and to transmit the pressure detection signal to the battery management system 50 or the vehicle 1000.

[0113] In some embodiments, the output portion 3212 may be a terminal structure that can be directly plugged into and connected to the battery management system 50.

[0114] If the output section 3212 is designed to pass through the plate 122, then a corresponding through hole needs to be configured on the plate 122. The shape and size of the through hole should match the output section 3212 so that the output section 3212 can be physically connected to the battery management system 50 or the vehicle 1000.

[0115] Combined with appendix Figure 10 As shown, in some examples, the battery device 100 may optionally include a battery management system 50, with an output portion 3212 electrically connected to the battery management system 50 and used to output a pressure detection signal to the battery management system 50.

[0116] The battery management system 50 (BMS) is a key electronic control unit that monitors and manages the battery device 100. It controls parameters such as voltage, current, temperature, state of charge and power of the battery device 100 and is connected to electrical equipment (such as the vehicle system of vehicle 1000).

[0117] The battery management system 50 receives pressure signals detected by the pressure detection device 323. When the pressure sensor signal of the underbody protection plate exceeds a set threshold, the battery management system 50 issues graded warnings based on the pressure magnitude and rate of change. For example, a level one warning displays a warning message on the vehicle's instrument panel or central control screen, prompting the user to check. If the pressure rises sharply to a dangerous threshold, the battery management system 50 or the vehicle 1000 issues an audible and visual alarm and immediately performs power-off protection, while simultaneously sending a serious collision safety warning to the user through the vehicle's onboard system.

[0118] In this embodiment, the battery management system 50 directly receives pressure detection signals to monitor the pressure condition of the protective component 30. This not only provides a rapid response and can issue an early warning when the pressure on the protective component 30 exceeds the threshold, but also eliminates the need for additional early warning or control devices, thus simplifying the structure of the battery device 100.

[0119] In some examples, optionally, the first connector 321 and the second connector 322 are circuit boards, and the battery management system 50 is configured to detect the resistance of the first connector 321 and the second connector 322, and determine whether the first connector 321 and the second connector 322 are broken based on the detected resistance.

[0120] The battery management system 50 has a resistance detection circuit inside, which applies a test signal to the conductive loop of the first connector 321 and the second connector 322 and measures the loop resistance value.

[0121] The battery management system 50 internally stores the reference resistance range of the first connector 321 and the second connector 322 in their intact state. When the resistance value of either connector is detected to be abnormally increased to near open circuit (e.g., exceeding the threshold by several times) or completely infinite, it can be determined that the first connector 321 or the second connector 322 has suffered physical breakage, crack propagation, or connection failure.

[0122] In addition, early damage can be detected by the trend of resistance change before the first connector 321 or the second connector 322 completely fails, reducing the possibility of the fault expanding.

[0123] This structure utilizes the resistance of the circuit board itself as a sensing structure to warn of structural failure risks of the protection component 30 by whether a physical break occurs in the circuit. This not only enhances the fault detection capability of the battery device 100 and improves its reliability, but also eliminates the need for additional sensors, thus reducing detection costs.

[0124] In some examples, the battery device 100 may optionally include a heat exchanger 40 mounted on the plate 122 and located within the housing space 123, a battery management system 50 mounted on the heat exchanger 40, and an output portion 3212 passing through the heat exchanger 40 and electrically connected to the battery management system 50.

[0125] The heat exchanger 40 can be made of thermally conductive materials such as aluminum alloy. It has internal flow channels, through which coolant circulates to dissipate heat from the battery device 100, maintain the battery device 100 in a suitable temperature range, and improve the safety and lifespan of the battery device 100.

[0126] A through hole needs to be formed on the heat exchanger 40 for the output section 3212 to pass through. The hole wall of the heat exchanger 40 needs to be sealed to prevent coolant from flowing out. The shape and size of the through hole match the output section 3212, and its shape will not be described in detail in this embodiment.

[0127] The output section 3212 passes through the heat exchanger 40, facilitating the first connector 321 to connect to the battery management system 50 located on the heat exchanger 40.

[0128] Combined with appendix Figure 7-9 As shown, in some examples, the detection unit 32 may optionally include a third connector 324 and at least one temperature sensor 325, the third connector 324 being connected to the first connector 321 and the temperature sensor 325 being mounted on the third connector 324.

[0129] The third connector 324 has the same or similar structure as the aforementioned second connector 322. For example, the third connector 324 may be a circuit board or an insulating component with wires.

[0130] The temperature detection element 325 can be a temperature sensor, such as a thermistor, thermocouple, digital temperature sensor, etc. This embodiment will not list them in detail.

[0131] The number of temperature sensing elements 325 can be one or multiple as shown in the figure, and multiple temperature sensing elements 325 are arranged at intervals along the length direction of the third connector 324.

[0132] The temperature detection signal detected by the temperature detection element 325 can be transmitted wirelessly or via line to the battery management system 50 of the battery device 100, or wirelessly or via line to the electrical device.

[0133] In this way, when the temperature reaches a certain threshold, the battery management system 50 or the electrical device can display or issue a warning, so that the user can know the bottom temperature of the battery device 100, assess the usage risk of the battery device 100, reduce the possibility of the protection component 30 having an excessive bottom temperature and the battery device 100 continuing to be used, thus causing safety hazards and improving the reliability of the battery device 100.

[0134] In some examples, the third connector 324 is optionally electrically connected to the temperature sensor 325 thereon, and the third connector 324 is electrically connected to the first connector 321, which is configured to receive and output the temperature detection signal of the temperature sensor 325.

[0135] Regarding the conductive connection between the third connector 324 and the first connector 321, which is the same as the aforementioned conductive connection between the second connector 322 and the first connector 321, the structure of the third connector 324 can be the same as that of the second connector 322.

[0136] The detection signal of the temperature detection element 325 is output to the outside through the third connector 324 and the first connector 321. The output can be in the form of current, voltage or digital signal, as described above, so as to facilitate the knowledge of the temperature status of the protection component 30.

[0137] In some examples, optionally, along the length of the first connector 321, the third connector 324 is located between two adjacent second connectors 322.

[0138] The length direction of the first connector 321 can be the width direction of the first guard plate 31. The third connector 324 is located between two adjacent second connectors 322, and the third connector 324 can be arranged parallel to the second connectors 322.

[0139] By placing the temperature sensor 325 between two adjacent pressure detection modules, it is possible to determine whether the abnormal pressure of the protective component 30 is accompanied by an increase in temperature, thereby gaining a more comprehensive understanding of the pressure and temperature conditions of the protective component 30.

[0140] like Figure 8 and 9 As shown, in some embodiments, the third connector 324 may be located in the middle of a plurality of second connectors 322. Furthermore, the plurality of second connectors 322 and a first connector 321 may be arranged at equal intervals.

[0141] Of course, the arrangement of the second connector 322 and the third connector 324 is not limited to this. For example, the number of third connectors 324 can be designed to be multiple, and multiple second connectors 322 and multiple third connectors 324 can be arranged alternately along the length direction of the first connector 321 (this embodiment is not shown in the figure).

[0142] Combined again with the appendix Figure 7 As shown, in some examples, the protective assembly 30 may optionally include a second protective plate 33 connected to the side of the first protective plate 31 facing the plate body 122, and the detection unit 32 is connected between the first protective plate 31 and the second protective plate 33.

[0143] The second guard plate 33 is made of the same or similar material as the first guard plate 31; for example, both can be made of metal.

[0144] At least one of the second protective plate 33 and the first protective plate 31 has a recess to form a sandwich layer for accommodating the detection unit 32.

[0145] The detection unit 32 is positioned between the first protective plate 31 and the second protective plate 33. The first protective plate 31 and the second protective plate 33 form a sandwich layer that can protect the detection unit 32, which can improve the stability of the detection unit 32 after installation and thus improve the accuracy of detection.

[0146] In some examples, the protective assembly 30 may optionally include a third guard plate 34, which is mounted between the first guard plate 31 and the second guard plate 33, and the detection unit 32 is mounted between the first guard plate 31 and the third guard plate 34.

[0147] The third protective plate 34 enables the protective assembly 30 to form a multi-layer structure, which has better resistance to vibration and impact, thereby providing more stable protection for the battery box 10.

[0148] In some embodiments, the stiffness of the third protective plate 34 is greater than that of the first protective plate 31 and the second protective plate 33. The third protective plate 34 can be used as a puncture-resistant plate to provide puncture protection for the second protective plate 33, the battery housing 10 and the battery cell assembly.

[0149] The detection unit 32 is installed between the first guard plate 31 and the third guard plate 34, and will not affect the detection unit 32 from directly feeding back the pressure and impact changes of the first guard plate 31.

[0150] In some examples, optionally, the third guard plate 34 has a first receiving groove 341 on the side facing the first guard plate 31, and the detection unit 32 is installed in the first receiving groove 341.

[0151] The depth of the first receiving groove 341 can be greater than or equal to the thickness of the detection unit 32, so that the detection unit 32 can be completely accommodated.

[0152] Alternatively, a second receiving groove (not shown in the figure) may also be provided on the side of the second guard plate 33 facing the first guard plate 31. The first receiving groove 341 of the second guard plate 33 and the second receiving groove of the third guard plate 34 are used together to accommodate the detection unit 32.

[0153] The detection unit 32 is placed in the first receiving groove 341 on the surface of the third protective plate, thereby reducing the overall thickness of the protective assembly 30 and reducing the impact of the configuration of the detection unit 32 on the overall height of the battery device 100.

[0154] In some examples, optionally, the number of pressure detection elements 323 on each second connector 322 is multiple, and the multiple pressure detection elements 323 are arranged at intervals along the length direction of the second connector 322.

[0155] By using multiple pressure sensing elements 323, the area for pressure sensing of the protective component 30 can be increased, thereby improving the comprehensiveness of the detection.

[0156] Multiple pressure sensors 323 on multiple second connectors 322 form a rectangular detection array that can cover a portion of the bottom of the battery housing 10, which is a high-incidence area of ​​impact and deformation as determined by simulation experiments.

[0157] In some examples, the spacing c between two adjacent pressure sensors 323 located on the same second connector 322 can optionally range from 150 mm to 450 mm.

[0158] The distance c between two adjacent pressure detection elements 323 can refer to the nearest edge distance between two adjacent pressure detection elements 323, or it can refer to the center distance between two adjacent pressure detection elements 323.

[0159] The reason for the above-mentioned spacing c range is that if the spacing of the pressure detection element 323 is too large, it will be difficult to better cover the high-incidence area, and it will be easy to miss detection.

[0160] However, if the spacing between the pressure detection elements 323 is too small, the cost will be high and the detection areas of the two pressure detection elements 323 may overlap, resulting in waste.

[0161] Therefore, in this embodiment, the spacing c between two adjacent pressure detection elements 323 is in the range of 150mm to 450mm. For example, the spacing c can be 150mm, 200mm, 250mm, 300mm, 350mm, and 450mm, etc.

[0162] By using the above numerical range, both the pressure detection range and production costs can be balanced. Similarly, the spacing of the temperature sensing element 325 can also be set in the same way.

[0163] In some examples, optionally, the minimum spacing d between two adjacent second connectors 322 along the length direction of the first connector 321 is 100mm to 300mm.

[0164] The above design is also to balance the range of pressure detection and production cost. Therefore, the minimum distance d between two adjacent second connectors 322 is designed to the above value. For example, the distance d can be 100mm, 120mm, 150mm, 200mm, 250mm and 300mm, etc. This embodiment will not list them in detail.

[0165] In some examples, the length direction of the second connector 322 is optionally aligned with the length direction of the first guard plate 31.

[0166] The length of the second connector 322 may be slightly less than the length of the first guard plate 31. In some embodiments, the detection unit 32 is located within the first receiving groove 341, and the length of the second connector 322 may be equal to the length of the first receiving groove 341.

[0167] The longer the second connector 322 is, the more pressure detection components 323 can be placed, thereby enabling the detection of a larger area of ​​the pressure state at the bottom of the battery device 100.

[0168] Combined again with the appendix Figure 1 As shown, based on the battery device 100 described above, this application embodiment also provides an electrical device, including the battery device 100 described above. The battery device 100 is used to provide electrical energy to the electrical device, which may be a vehicle 1000.

[0169] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0170] Finally, please see the appendix. Figure 2-9As shown, this application embodiment provides a battery device 100, including a battery housing 10, a battery cell 20, and a protective assembly 30. The battery housing 10 includes a frame 121 and a plate 122. The plate 122 covers one side opening of the frame 121, and the frame 121 and the plate 122 enclose a receiving space 123. The battery cell 20 is received in the receiving space 123. The protective assembly 30 includes a first protective plate 31 and a detection unit 32. The first protective plate 31 is connected to the side of the plate 122 away from the receiving space 123. The detection unit 32 is installed between the plate 122 and the first protective plate 31. The detection unit 32 includes a first connector 321, a plurality of second connectors 322, and a plurality of pressure detection elements 323. The plurality of second connectors 322 are spaced apart on the first connector 321 along the length direction of the first connector 321. The length direction of the second connectors 322 intersects the length direction of the first connector 321. At least one pressure detection element 323 is installed on each second connector 322. Each second connector 322 is electrically connected to a pressure detection element 323 thereon. Multiple second connectors 322 are electrically connected to first connectors 321 respectively, and the first connectors 321 are configured to receive and output detection signals from the pressure detection elements 323. The first connectors 321 and / or the second connectors 322 are circuit boards. The circuit boards are flexible circuit boards. The first connector 321 includes a connecting portion 3211 and an output portion 3212. The connecting portion 3211 is electrically connected to the output portion 3212 and the multiple second connectors 322 respectively. The output portion 3212 passes through the plate 122 and is used to output the pressure detection signal from the pressure detection element 323. The battery device 100 also includes a battery management system 50. The output portion 3212 is electrically connected to the battery management system 50 and is used to output the pressure detection signal to the battery management system 50. The first connector 321 and the second connector 322 are circuit boards. The battery management system 50 is configured to detect the resistance of the first connector 321 and the second connector 322, and determine whether the first connector 321 and the second connector 322 are broken based on the detected resistance. The battery device 100 also includes a heat exchanger 40, which is mounted on the plate 122 and located within the receiving space 123. The battery management system 50 is mounted on the heat exchanger 40, and the output portion 3212 passes through the heat exchanger 40 and is electrically connected to the battery management system 50. The detection unit 32 also includes a third connector 324 and at least one temperature sensor 325. The third connector 324 is connected to the first connector 321, and the temperature sensor 325 is mounted on the third connector 324. The third connector 324 is electrically connected to the temperature sensor 325 thereon, and the third connector 324 is electrically connected to the first connector 321. The first connector 321 is configured to receive and output the temperature detection signal from the temperature sensor 325. Along the length of the first connector 321, the third connector 324 is located between two adjacent second connectors 322.The protective assembly 30 also includes a second protective plate 33, which is connected to the side of the first protective plate 31 facing the plate body 122. A detection unit 32 is connected between the first protective plate 31 and the second protective plate 33. The protective assembly 30 also includes a third protective plate 34, which is installed between the first protective plate 31 and the second protective plate 33. The detection unit 32 is installed between the first protective plate 31 and the third protective plate 34. The side of the third protective plate 34 facing the first protective plate 31 has a first receiving groove 341, and the detection unit 32 is installed within the first receiving groove 341. Each second connecting member 322 has multiple pressure detection elements 323, which are spaced apart along the length of the second connecting member 322. The spacing between two adjacent pressure detection elements 323 on the same second connecting member 322 ranges from 150mm to 450mm. Along the length of the first connecting member 321, the minimum spacing between two adjacent second connecting members 322 is from 100mm to 300mm. The length direction of the second connector 322 is set along the length direction of the first guard plate 31.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for the intermediate technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, characterized by, include: A battery housing includes a frame and a panel, the panel covering an opening on one side of the frame, the frame and the panel forming an accommodating space; A single battery cell is housed within the aforementioned housing space; as well as The protective assembly includes a first protective plate and a detection unit. The first protective plate is connected to the side of the plate body away from the receiving space. The detection unit is installed between the plate body and the first protective plate. The detection unit includes a first connector, a plurality of second connectors, and a plurality of pressure detection elements. The plurality of second connectors are spaced apart on the first connector along the length direction of the first connector. The length direction of the second connectors intersects the length direction of the first connector. At least one pressure detection element is installed on each of the second connectors.

2. The battery device according to claim 1, characterized by Each of the second connectors is electrically connected to the pressure sensing element thereon, the plurality of second connectors are electrically connected to the first connector respectively, and the first connector is configured to receive and output the pressure sensing signal of the pressure sensing element.

3. The battery device of claim 2, wherein, The first connector and / or the second connector are circuit boards.

4. The battery device of claim 3, wherein The circuit board is a flexible circuit board.

5. The battery device of claim 2, wherein The first connector includes a connecting portion and an output portion. The connecting portion is electrically connected to the output portion and the plurality of second connectors respectively. The output portion passes through the plate and is used to output the pressure detection signal of the pressure detection element to the outside.

6. The battery device of claim 5, wherein, The battery device includes a battery management system, and the output section is electrically connected to the battery management system and is used to output the pressure detection signal to the battery management system.

7. The battery device of claim 6, wherein The first connector and the second connector are circuit boards. The battery management system is configured to detect the resistance of the first connector and the resistance of the second connector, and determine whether the first connector and the second connector are broken based on the detected resistance.

8. The battery device of claim 6, wherein, The battery device further includes a heat exchanger, which is mounted on the plate and located within the receiving space. The battery management system is mounted on the heat exchanger, and the output portion passes through the heat exchanger and is electrically connected to the battery management system.

9. The battery device according to any one of claims 1 to 8, characterized by, The detection unit further includes a third connector and at least one temperature sensor, wherein the third connector is connected to the first connector and the temperature sensor is mounted on the third connector.

10. The battery device of claim 9, wherein, The third connector is electrically connected to the temperature sensing element thereon, and the third connector is electrically connected to the first connector. The first connector is configured to receive and output the temperature sensing signal of the temperature sensing element.

11. The battery device of claim 9, wherein, Along the length of the first connector, the third connector is located between two adjacent second connectors.

12. The battery device according to any one of claims 1 to 8, wherein The protective assembly further includes a second protective plate, which is connected to the side of the first protective plate facing the plate body, and the detection unit is connected between the first protective plate and the second protective plate.

13. The battery device of claim 12, wherein, The protective assembly further includes a third protective plate, which is installed between the first protective plate and the second protective plate, and the detection unit is installed between the first protective plate and the third protective plate.

14. The battery device of claim 13, wherein, The third guard plate has a first receiving groove on the side facing the first guard plate, and the detection unit is installed in the first receiving groove.

15. The battery device according to any one of claims 1 to 8, wherein The number of pressure detection elements on each of the second connectors is multiple, and the multiple pressure detection elements are arranged at intervals along the length direction of the second connector.

16. The battery device of claim 15, wherein, The spacing between two adjacent pressure detection elements located on the same second connector ranges from 150 mm to 450 mm.

17. The battery device of any one of claims 1-8, wherein, Along the length of the first connector, the minimum distance between two adjacent second connectors is 100mm to 300mm.

18. The battery device of any one of claims 1-8, wherein, The length direction of the second connector is set along the length direction of the first guard plate.

19. An electrical device, characterized by Includes the battery device as described in any one of claims 1-18, the battery device being used to store electrical energy or provide electrical energy.

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