Battery, battery management system, and electric device

Abstract

A battery (100), a battery management system (400), and an electric device (500). The battery (100) comprises: a case (10); a liquid leakage detection member (20), the liquid leakage detection member (20) being arranged in the case (1) to detect liquid in the case (10), and the liquid leakage detection member (20) being adapted to be communicationally connected to a control device (200) so that the control device (200) controls an alarm device (300) to operate; and a liquid drainage member (30), the liquid drainage member (30) being arranged in the case (10), and the liquid drainage member (30) being fixedly arranged on the bottom wall (11) of the case (10).

Description

Batteries, battery management systems, and power-consuming devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202323248639.5 and application date of November 28, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of batteries, and in particular to a battery, a battery management system, and an electrical device. Background Art

[0004] In related technologies, when battery coolant leaks inside the battery box, the coolant has a certain degree of conductivity, which can cause insulation failure in the battery, posing a risk of electric shock. There are many factors that can cause insulation failure in batteries, and it is impossible to accurately detect whether the insulation failure is caused by coolant leakage, and the user cannot be promptly informed of the insulation failure caused by coolant leakage. At the same time, when the coolant comes into contact with high-voltage components inside the battery, it can easily cause the battery to catch fire or explode.

[0005] Summary of the Invention

[0006] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, one purpose of the present application is to provide a battery that can promptly alert a user of the leakage of liquid in the battery and can also drain the liquid in the battery box when liquid leaks in the battery box.

[0008] Another objective of the present application is to provide a battery management system.

[0009] Another object of the present application is to provide an electrical device.

[0010] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0011] Box;

[0012] A liquid leakage detection component is provided in the box body to detect the liquid in the box body, and the liquid leakage detection component is suitable for communicating with the control device so that the control device controls the alarm device to work;

[0013] The liquid discharge member is arranged in the box body and is fixed to the bottom wall of the box body.

[0014] According to the battery of the present application, by providing a leakage detection component and a drainage component, when the leakage detection component detects liquid leakage in the box, the control device can control the alarm device to send an alarm message, which can promptly remind the user that there is liquid leakage in the battery and remind the user to evacuate in time. In addition, the drainage component can discharge the liquid in the box, reducing the risk of contact between the liquid in the battery and high-voltage components, reducing the risk of fire and explosion of the battery, and also reducing the risk of electric shock to the user.

[0015] In a second aspect, an embodiment of the present application further provides a battery management system, comprising:

[0016] Battery, the battery is the battery mentioned above;

[0017] The control device and the alarm device are communicatively connected with the liquid leakage detection component and the alarm device. The control device controls the alarm device to work according to the detection information of the liquid leakage detection component.

[0018] According to the battery management system of the present application, the control device can obtain the detection information of the leakage detection part in real time. When the leakage detection part detects that there is liquid in the box, there is a coolant leak in the battery. The control device controls the alarm device to issue an alarm message, which can promptly remind the user that there is liquid leakage in the battery, remind the user to evacuate in time, and reduce the risk to the user's life safety. When the liquid in the box leaks, the liquid will gather on the bottom wall of the box body, and the liquid will be discharged from the battery box through the drainage part, reducing the risk of contact between the liquid in the battery and the high-voltage components, reducing the risk of insulation failure in the battery, thereby reducing the risk of fire and explosion of the battery, and reducing the risk of electric shock to the user, thereby improving battery safety.

[0019] In a third aspect, an embodiment of the present application further provides an electrical device comprising the above-mentioned battery management system.

[0020] According to the electrical device of the present application, the safety of the electrical device is improved by providing a battery management system.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of an electrical device according to an embodiment of the present application;

[0023] FIG2 is a schematic diagram of a battery according to an embodiment of the present application;

[0024] FIG3 is a cross-sectional view at AA in FIG2 ;

[0025] Figure 4 is an enlarged view of point C in Figure 3;

[0026] Figure 5 is a cross-sectional view at point BB in Figure 2;

[0027] Figure 6 is an enlarged view of point D in Figure 5;

[0028] FIG7 is a schematic diagram of a second box body of a battery according to an embodiment of the present application;

[0029] FIG8 is a schematic diagram of a battery cell according to an embodiment of the present application;

[0030] FIG9 is a block diagram of a battery management system according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0034] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0036] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0037] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0038] The term "plurality" used in this application refers to two or more (including two).

[0039] 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.

[0040] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0041] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid through a busbar.

[0042] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0043] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0044] 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.

[0045] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0046] The development of battery technology must take into account multiple design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the safety performance of the battery also needs to be considered.

[0047] In a battery, to ensure the safety and operating performance of the battery cells, a heat exchange component is provided in the battery casing. The heat exchange component contains coolant to exchange heat between the heat exchange component and the battery cells, thereby improving battery safety and operating reliability.

[0048] When the battery coolant leaks inside the battery box, the coolant's conductivity can cause insulation failure in the battery, posing a risk of electric shock. There are multiple factors that can cause insulation failure in batteries, and it's impossible to accurately detect when a coolant leak is causing insulation failure, preventing users from being promptly notified of such failures. Furthermore, if the coolant comes into contact with high-voltage components inside the battery, it can easily create a fire or explosion risk.

[0049] In view of this, an embodiment of the present application provides a battery comprising a housing, a leakage detector, and a drain. The leakage detector is disposed within the housing to detect liquid within the housing, is communicatively connected to a control device so that the control device controls an alarm device, and the drain is fixed to the bottom wall of the housing.

[0050] In such a battery, by setting a leakage detection component and a drainage component, when the leakage detection component detects liquid leakage in the box, the control device can control the alarm device to issue an alarm message, which can promptly remind the user that there is liquid leakage in the battery and remind the user to evacuate in time. In addition, the drainage component can discharge the liquid in the box, reducing the risk of contact between the liquid in the battery and high-voltage components, reducing the risk of fire and explosion of the battery, and also reducing the risk of electric shock to the user.

[0051] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0052] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0054] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application. A battery 100 is disposed within the vehicle, and battery 100 may be located at the bottom, front, or rear of the vehicle. Battery 100 may be used to power the vehicle, for example, as the vehicle's operating power source.

[0055] The vehicle may further include a controller 600 and a motor 700 . The controller 600 is used to control the battery 100 to supply power to the motor 700 , for example, to meet the power requirements of starting, navigating, and driving the vehicle.

[0056] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0057] Please refer to Figure 2, which is a schematic diagram of a battery 100 provided in some embodiments of the present application. The battery 100 includes a battery cell 40 and a housing 10, wherein the housing 10 is used to accommodate the battery cell 40.

[0058] The housing 10 is a component that houses the battery cells 40. The housing 10 provides a storage space for the battery cells 40 and can have various structures. In some embodiments, the housing 10 can include a first housing body 13 and a second housing body 14. The first housing body 13 and the second housing body 14 cover each other to define a storage space for accommodating the battery cells 40. The first housing body 13 and the second housing body 14 can have various shapes, such as a rectangular parallelepiped, a cylinder, etc. The first housing body 13 can be a hollow structure with one side open, and the second housing body 14 can also be a hollow structure with one side open. The open side of the second housing body 14 covers the open side of the first housing body 13, thereby forming the housing 10 with a storage space. Alternatively, the first housing body 13 can be a hollow structure with one side open, and the second housing body 14 can be a plate-like structure. The second housing body 14 covers the open side of the first housing body 13, thereby forming the housing 10 with a storage space. As an example, the battery cell 40 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell 40 of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, and a polygonal battery such as a hexagonal battery, etc. There is no special limitation in this application.

[0059] In the battery 100, there can be one or more battery cells 40. If there are multiple battery cells 40, the multiple battery cells 40 can be connected in series, parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 40. Multiple battery cells 40 can be connected in series, parallel, or in a hybrid connection to form a battery module, which is then connected in series, parallel, or in a hybrid connection to form a whole and housed within the housing 10. Alternatively, all battery cells 40 can be directly connected in series, parallel, or in a hybrid connection, and then the whole battery module can be housed within the housing 10.

[0060] The battery cell 40 may include a housing 41 and an electrode assembly. The housing 41 is used to accommodate components such as the electrode assembly and the electrolyte. The housing 41 may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. As an example, the housing 41 may include a shell 42 and an end cap 43. The shell 42 may be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at two opposite ends. The shell 42 may be made of a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0061] The end cap 43 is a component that closes the opening of the shell 42 to isolate the internal environment of the battery cell 40 from the external environment. The end cap 43 and the shell 42 together define a storage space for accommodating the electrode assembly, electrolyte, and other components. The end cap 43 can be connected to the shell 42 by welding or crimping to close the opening of the shell 42. The shape of the end cap 43 can be adapted to the shape of the outer shell 41. For example, if the shell 42 is a rectangular parallelepiped structure, the end cap 43 is a rectangular plate structure adapted to the shell 42. The material of the end cap 43 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0062] In the battery cell 40, there can be one or two end caps 43. In embodiments where the housing 42 is a hollow structure with openings at both ends, two end caps 43 can be provided. The two end caps 43 respectively close the two openings of the housing 42, and the two end caps 43 and the housing 42 together define a storage space. In embodiments where the housing 42 is a hollow structure with an opening at one end, there can be one end cap 43 provided. The end cap 43 closes the opening at one end of the housing 42, and the end cap 43 and the housing 42 together define a storage space.

[0063] The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 40, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0064] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material region disposed on at least one surface of the positive electrode current collector, wherein the positive electrode active material region has a positive electrode active material.

[0065] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material region is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0066] In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector and a negative electrode active material region disposed on at least one surface of the negative electrode current collector.

[0067] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material region is provided on either one or both of the two facing surfaces of the negative electrode current collector.

[0068] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0069] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0070] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0071] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0072] In some embodiments, the battery cell 40 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0073] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0074] In some embodiments, the electrode assembly is a laminate structure.

[0075] The battery 100 according to an embodiment of the present application is described below with reference to FIG. 2 to FIG. 7 .

[0076] The battery 100 according to an embodiment of the present application includes: a housing 10, a leakage detector 20, and a drain 30. The leakage detector 20 is disposed within the housing 10 to detect liquid within the housing 10 and is adapted to communicate with a control device 200, enabling the control device 200 to control the operation of an alarm device 300. The drain 30 is disposed within the housing 10 and is fixed to the bottom wall 11 of the housing 10.

[0077] The leakage detection element 20 is disposed within the housing 10 and can be located within the placement space 15 of the housing 10. The leakage detection element 20 can detect the liquid within the housing 10. When coolant leaks from the battery 100, the leakage detection element 20 can detect the leaked coolant within the housing 10. The leakage detection element 20 can be a capacitive leakage sensor, a resistive leakage sensor, an ultrasonic leakage sensor, etc. The specific type of the leakage detection element 20 is not specifically limited, as long as the leakage detection element 20 can detect the liquid within the housing 10. The leakage detection element 20 can be in communication with the control device 200. When the leakage detection element 20 detects liquid within the housing 10, the control device 200 controls the alarm device 300 to issue an alarm message. The alarm message can be an audible alarm message or a light alarm message, which can promptly alert the user that there is a liquid leak in the battery 100 and remind the user to evacuate in time. The drain member 30 is disposed within the housing 10 and is fixed to the bottom wall 11 of the housing 10. The drain member 30 may be fixed to the bottom wall 11 of the housing 10 by bolts, or may be snap-fitted to the bottom wall 11 of the housing 10. If liquid within the housing 10 leaks, the liquid will collect on the bottom wall 11 of the housing 10. By fixing the drain member 30 to the bottom wall 11 of the housing 10, the liquid within the housing 10 can be promptly discharged from the housing 10 of the battery 100. The drain member 30 may be configured as a drain valve, which may be a one-way valve.

[0078] Specifically, the control device 200 can obtain the detection information of the leakage detection component 20 in real time. When the leakage detection component 20 detects that there is liquid in the box body 10, there is a coolant leak in the battery 100. The control device 200 controls the alarm device 300 to issue an alarm message, which can promptly remind the user that there is liquid leakage in the battery 100, remind the user to evacuate in time, and reduce the risk to the user's life safety. When the liquid in the box body 10 leaks, the liquid will gather on the bottom wall 11 of the box body 10, and the liquid will be discharged from the box body 10 of the battery 100 through the drainage component 30, reducing the risk of contact between the liquid in the battery 100 and the high-voltage components, reducing the risk of insulation failure in the battery 100, thereby reducing the risk of fire and explosion in the battery 100, and also reducing the risk of electric shock to the user, thereby improving the safety of the battery 100.

[0079] In the above technical solution, by setting a leakage detection component 20 and a drainage component 30, when the leakage detection component 20 detects liquid leakage in the box body 10, the control device 200 can control the alarm device 300 to issue an alarm message, which can promptly remind the user that there is liquid leakage in the battery 100 and remind the user to evacuate in time. In addition, the drainage component 30 can discharge the liquid in the box body 10, reducing the risk of contact between the liquid in the battery 100 and high-voltage components, reducing the risk of fire and explosion of the battery 100, and also reducing the risk of electric shock to the user.

[0080] According to some embodiments of the present application, as shown in FIG. 4 , the height of the detection end 21 of the leakage detection member 20 is lower than the height of the discharge port 31 of the discharge member 30 .

[0081] As shown in FIG4 , the detection end 21 of the leakage detector 20 is used to detect liquid within the battery housing 10 of the battery 100. The leakage detector 20 detects whether there is liquid within the battery housing 10 of the battery 100 through the detection end 21. The liquid within the battery housing 10 of the battery 100 is discharged from the battery housing 10 of the battery 100 through the discharge port 31 of the discharge member 30. It should be noted that if the detection end 21 of the leakage detector 20 is higher than the discharge port 31 of the discharge member 30, when there is liquid within the battery housing 10 of the battery 100, the liquid will first be discharged from the battery housing 10 of the battery 100 through the discharge port 31 of the discharge member 30. The leakage detector 20 will not detect the liquid until the liquid level within the battery housing 10 of the battery 100 reaches the height of the detection end 21 of the leakage detector 20. In this case, the liquid may not be detected by the leakage detector 20 in a timely manner, and may come into contact with high-voltage components before being detected by the leakage detector 20. In the present application, the height of the detection end 21 of the leakage detection component 20 is lower than the height of the discharge port 31 of the discharge component 30. When there is liquid in the case 10 of the battery 100, the liquid in the case 10 of the battery 100 is first detected by the leakage detection component 20 before the liquid in the case 10 of the battery 100 is discharged from the case 10 of the battery 100 from the discharge port 31 of the discharge component 30. This can prompt the user more promptly that there is liquid leakage in the battery 100, quickly remind the user to evacuate in time, further reduce the risk to the user's life safety, and further reduce the risk of liquid in the battery 100 contacting high-voltage components, further reducing the risk of insulation failure of the battery 100.

[0082] In the above technical solution, the height of the detection end 21 of the leakage detection component 20 is lower than the height of the discharge port 31 of the discharge component 30. When there is liquid in the case 10 of the battery 100, the liquid in the case 10 of the battery 100 is first detected by the leakage detection component 20 before the liquid in the case 10 of the battery 100 is discharged from the case 10 of the battery 100 through the discharge port 31 of the discharge component 30. This can promptly remind the user that there is liquid leakage in the battery 100, quickly remind the user to evacuate in time, further reduce the risk to the user's life safety, and further reduce the risk of liquid in the battery 100 contacting high-voltage components, further reducing the risk of insulation failure in the battery 100.

[0083] According to some embodiments of the present application, the height of the drain port 31 of the drain member 30 is lower than the lowest height of the high-voltage components in the box body 10 .

[0084] In the height direction of the battery 100, i.e., the vertical direction in FIG4 , the height of the drain port 31 of the drain member 30 is lower than the lowest height of the high-voltage components within the housing 10. It should be noted that if the drain port 31 of the drain member 30 were higher than the lowest height of the high-voltage components within the housing 10, when there is liquid within the housing 10 of the battery 100, there is a risk that the liquid within the housing 10 of the battery 100 would come into contact with the high-voltage components before the liquid within the housing 10 of the battery 100 is discharged from the housing 10 of the battery 100 through the drain port 31 of the drain member 30. Therefore, in the present application, the height of the discharge port 31 of the discharge member 30 is lower than the lowest height of the high-voltage components in the box body 10. When there is liquid in the box body 10 of the battery 100, the risk of contact between the liquid in the box body 10 of the battery 100 and the high-voltage components can be further reduced, and the risk of insulation failure of the battery 100 can be further reduced, thereby further reducing the risk of fire and explosion of the battery 100, further reducing the risk of electric shock to users, and further improving the safety of the battery 100.

[0085] In the above technical solution, the height of the discharge port 31 of the discharge member 30 is lower than the lowest height of the high-voltage components in the box body 10. When there is liquid in the box body 10 of the battery 100, the risk of contact between the liquid in the box body 10 of the battery 100 and the high-voltage components can be further reduced, and the risk of insulation failure of the battery 100 can be further reduced, thereby further reducing the risk of fire and explosion of the battery 100, further reducing the risk of electric shock to users, and further improving the safety of the battery 100.

[0086] According to some embodiments of the present application, as shown in FIG. 4 , the liquid discharge member 30 is disposed at the lowest position of the inner surface of the box bottom wall 11 , and the liquid leakage detector 20 corresponds to the lowest position of the inner surface of the box bottom wall 11 .

[0087] When liquid leaks from the battery case 100, the liquid will accumulate at the lowest position of the inner surface of the bottom wall 11 of the case. By locating the drain member 30 at the lowest position of the inner surface of the bottom wall 11, the liquid in the battery case 100 can be discharged from the battery case 10 more promptly, and the location of the drain member 30 can be appropriately positioned. Furthermore, by locating the leakage detector 20 so that it corresponds to the lowest position of the inner surface of the bottom wall 11 along the height direction of the battery 100, the leakage detector 20 can be aligned with the position of the bottom wall 11 on the case where liquid is most likely to accumulate. This allows the leakage detector 20 to promptly detect whether there is liquid in the battery case 100, thereby improving the detection accuracy of the leakage detector 20 and promptly notifying the user of a liquid leak in the battery 100, prompting the user to evacuate promptly.

[0088] In the above technical solution, by positioning the drain member 30 at the lowest position on the inner surface of the bottom wall 11 of the battery case, liquid within the battery case 100 can be more promptly drained from the battery case 100, thereby ensuring that the position of the drain member 30 is appropriate. Furthermore, by positioning the leakage detector 20 so that it corresponds to the lowest position on the inner surface of the bottom wall 11 of the battery case, the leakage detector 20 can be aligned with the position on the bottom wall 11 of the battery case where liquid is most likely to accumulate. This allows the leakage detector 20 to promptly detect whether liquid is present within the battery case 100, thereby improving the detection accuracy of the leakage detector 20 and promptly notifying the user of any leakage within the battery case 100, prompting the user to evacuate promptly.

[0089] According to some embodiments of the present application, as shown in FIG. 4 , a groove structure 12 is formed on the bottom wall 11 of the box body, which is recessed toward the outside of the box body 10 , and a detection end 21 of the liquid leakage detector 20 is located in the groove structure 12 .

[0090] Among them, along the up-down direction of the battery 100, that is, along the height direction of the battery 100, the bottom wall 11 of the box body is formed with a groove structure 12 that is concave toward the bottom of the box body 10, and the detection end 21 of the leakage detection member 20 is located in the groove structure 12. It should be noted that the lowest position of the inner surface of the bottom wall 11 of the box body is the position of the bottom wall of the groove structure 12. When there is liquid in the box body 10 of the battery 100, the liquid is likely to accumulate in the groove structure 12. By arranging the detection end 21 of the leakage detection member 20 in the groove structure 12, the leakage detection member 20 can detect the liquid in the groove structure 12 in a timely manner, which can further improve the detection accuracy of the leakage detection member 20, and can more promptly remind the user that there is liquid leakage in the battery 100, which is conducive to reminding the user to evacuate in time, thereby making the detection end 21 of the leakage detection member 20 reasonably arranged.

[0091] In the above technical solution, by setting the detection end 21 of the leakage detection component 20 in the groove structure 12, the leakage detection component 20 can detect the liquid in the groove structure 12 in a timely manner, which can further improve the detection accuracy of the leakage detection component 20, and can prompt the user more promptly that there is liquid leakage in the battery 100, which is conducive to reminding the user to evacuate in time, thereby making the detection end 21 of the leakage detection component 20 reasonably arranged.

[0092] According to some embodiments of the present application, as shown in FIG. 4 , the drainage member 30 is disposed in the groove structure 12 .

[0093] Among them, the drainage component 30 is arranged in the groove structure 12, and the bottom wall of the groove structure 12 is provided with the drainage component 30. When there is liquid in the box body 10 of the battery 100, the liquid is easy to accumulate in the groove structure 12. By arranging the drainage component 30 in the groove structure 12, it is conducive to timely discharge of the liquid in the box body 10 of the battery 100, further reducing the risk of contact between the liquid in the battery 100 and the high-voltage components, further reducing the risk of insulation failure of the battery 100, thereby further reducing the risk of fire and explosion of the battery 100, and further reducing the risk of electric shock to users, thereby further improving the safety of the battery 100.

[0094] In the above technical solution, by arranging the drainage member 30 in the groove structure 12, it is beneficial to discharge the liquid in the box body 10 of the battery 100 in a timely manner, further reducing the risk of contact between the liquid in the battery 100 and the high-voltage components, further reducing the risk of insulation failure of the battery 100, thereby further reducing the risk of fire and explosion of the battery 100, and further reducing the risk of electric shock to users, thereby further improving the safety of the battery 100.

[0095] According to some embodiments of the present application, as shown in FIG. 4 , the liquid leakage detection member 20 is spaced apart from the bottom wall 11 of the box.

[0096] The leakage detector 20 is spaced apart from the bottom wall 11 of the box along the height direction of the battery 100, that is, along the vertical direction of the battery 100. Furthermore, the detection end 21 of the leakage detector 20 is spaced apart from the bottom wall 11 of the box. The spacing between the leakage detector 20 and the bottom wall 11 can be reasonably selected and set according to actual conditions. By spacing the leakage detector 20 from the bottom wall 11 of the box, the probability of interference between the detection end 21 of the leakage detector 20 and the bottom wall 11 during installation, which may cause false alarms of the alarm device 300, can be reduced.

[0097] In the above technical solution, by separating the leakage detector 20 from the bottom wall 11 of the box, the probability of interference between the detection end 21 of the leakage detector 20 and the bottom wall 11 of the box during installation, thereby causing the alarm device 300 to falsely alarm, can be reduced.

[0098] According to some embodiments of the present application, as shown in FIG. 5 and FIG. 7 , there may be multiple leakage detection elements 20 , which are connected in parallel and are located at different positions in the box body 10 .

[0099] Among them, the leakage detection member 20 can be set to multiple, and the leakage detection member 20 can be two, three, four, five, etc. The multiple leakage detection members 20 are all connected to the control device 200 for communication, and the control device 200 can receive the detection information of any leakage detection member 20. The multiple leakage detection members 20 are respectively arranged at different positions in the box body 10. It should be noted that the multiple leakage detection members 20 are respectively arranged at the positions in the box body 10 that are most likely to accumulate liquid. The bottom wall 11 of the box body can be formed with multiple groove structures 12, and each groove structure 12 corresponds to at least one leakage detection member 20. By locating the multiple leakage detection members 20 at different positions in the box body 10, liquid detection can be performed on multiple positions in the box body 10 at the same time, which is conducive to the vehicle detecting the liquid in the box body 10 of the battery 100 by the leakage detection member 20 at different inclination angles. When at least one leakage detection member 20 detects that there is liquid in the box body 10 of the battery 100, the control device 200 will control the alarm device 300 to send an alarm message.

[0100] In the above technical solution, by locating multiple leakage detection components 20 at different positions in the box body 10, liquid detection can be performed on multiple positions in the box body 10 at the same time, which is beneficial for the leakage detection component 20 to detect the liquid in the box body 10 of the battery 100 under different inclination angles of the vehicle. When at least one leakage detection component 20 detects that there is liquid in the box body 10 of the battery 100, the control device 200 will control the alarm device 300 to issue an alarm message. No matter what inclination angle the vehicle is in, if there is liquid leakage in the box body 10, the alarm function can be realized.

[0101] According to some embodiments of the present application, as shown in FIG. 5 and FIG. 7 , there may be multiple drainage components 30 , and one leakage detection component 20 is correspondingly provided with at least one drainage component 30 .

[0102] There may be multiple drain components 30, with one leakage detector 20 corresponding to at least one drain component 30. As an example, the number of drain components 30 provided is the same as the number of leakage detectors 20, and both the number of drain components 30 provided and the number of leakage detectors 20 provided may be two, three, four, five, or the like. One leakage detector 20 is provided corresponding to one drain component 30, and the multiple drain components 30 are respectively located at different positions within the housing 10, and the drain components 30 and the leakage detector 20 are arranged in pairs. By providing one leakage detector 20 corresponding to at least one drain component 30, when liquid leaks within the housing 10, the multiple drain components 30 can drain liquid at different positions out of the housing 10 of the battery 100, thereby reducing the risk of liquid accumulation within the housing 10 of the battery 100, further reducing the risk of liquid within the battery 100 coming into contact with high-voltage components, and further reducing the risk of insulation failure within the battery 100.

[0103] In the above technical solution, by arranging a leakage detection component 20 corresponding to at least one drainage component 30, when the liquid in the box body 10 leaks, multiple drainage components 30 can discharge the liquid at different positions out of the box body 10 of the battery 100, thereby reducing the risk of liquid accumulation in the box body 10 of the battery 100, further reducing the risk of contact between the liquid in the battery 100 and the high-voltage components, and further reducing the risk of insulation failure of the battery 100. Regardless of the tilt angle of the entire vehicle, if there is liquid leakage in the box body 10, the drainage function can be realized.

[0104] According to some embodiments of the present application, as shown in FIG. 3 and FIG. 4 , the liquid leakage detector 20 is fixed to the box body 10 .

[0105] The leakage detection member 20 can be fastened to the housing 10 by means of a buckle, or can be mounted on the housing 10 by means of bolts. As an example, the leakage detection member 20 is fastened to the side wall of the housing 10 by means of a buckle. By fixing the leakage detection member 20 to the housing 10, the position of the leakage detection member 20 can be stabilized, the detection accuracy of the leakage detection member 20 can be improved, and the assembly of the leakage detection member 20 can be facilitated, thereby improving the assembly efficiency of the battery 100. At the same time, the maintenance and replacement of the leakage detection member 20 can be facilitated, thereby extending the service life of the battery 100.

[0106] In the above technical solution, by fixing the leakage detection component 20 to the box body 10, the position of the leakage detection component 20 can be stabilized, the detection accuracy of the leakage detection component 20 can be improved, and the assembly of the leakage detection component 20 is facilitated, thereby improving the assembly efficiency of the battery 100. At the same time, it is also convenient for the maintenance and replacement of the leakage detection component 20, thereby extending the service life of the battery 100.

[0107] According to some embodiments of the present application, as shown in Figure 9, the present application also provides a battery management system 400, including: a battery 100, the battery 100 is the battery 100 of the above embodiment; a control device 200 and an alarm device 300, the control device 200 is communicatively connected with the leakage detection component 20 and the alarm device 300, and the control device 200 controls the operation of the alarm device 300 according to the detection information of the leakage detection component 20.

[0108] Among them, the control device 200 can obtain the detection information of the leakage detection part 20 in real time. When the leakage detection part 20 detects that there is liquid in the box body 10, there is a coolant leak in the battery 100. The control device 200 controls the alarm device 300 to issue an alarm message, which can promptly remind the user that there is liquid leakage in the battery 100, remind the user to evacuate in time, and reduce the risk to the user's life safety. When the liquid in the box body 10 leaks, the liquid will gather on the bottom wall 11 of the box body 10, and the liquid will be discharged from the box body 10 of the battery 100 through the drainage part 30, reducing the risk of contact between the liquid in the battery 100 and the high-voltage components, reducing the risk of insulation failure in the battery 100, thereby reducing the risk of fire and explosion in the battery 100, and also reducing the risk of electric shock to the user, thereby improving the safety of the battery 100.

[0109] According to some embodiments of the present application, the alarm device 300 is a sound alarm device 300 and / or a light alarm device 300 .

[0110] The alarm device 300 is a sound alarm device 300 or a light alarm device 300, or the alarm device 300 includes a sound alarm device 300 and a light alarm device 300. The sound alarm device 300 can emit a sound alarm message so that the user can hear the alarm message in time. The light alarm device 300 can emit a light alarm message so that the user can see the alarm message in time.

[0111] According to some embodiments of the present application, as shown in FIG1 , the present application further provides an electric device 500 , comprising the battery management system 400 of the above embodiment.

[0112] According to some embodiments of the present application, as shown in Figures 3 and 7, the battery 100 includes: a housing 10, multiple leakage detection components 20, and multiple drainage components 30. The multiple leakage detection components 20 are all arranged in the housing 10 to detect the liquid in the housing 10, and the multiple leakage detection components 20 are all connected to the control device 200 for communication, and the control device 200 is connected to the alarm device 300 for communication so that the control device 200 controls the alarm device 300 to operate. The multiple leakage detection components 20 are arranged at different positions in the housing 10, the multiple drainage components 30 are arranged in the housing 10, and the multiple drainage components 30 are fixed to the bottom wall 11 of the housing 10. The multiple drainage components 30 are arranged at different positions in the housing 10, and the multiple drainage components 30 are arranged in a one-to-one correspondence with the multiple leakage detection components 20.

[0113] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0114] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0115] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery, wherein: include: Box; A liquid leakage detection component, which is arranged in the box body to detect the liquid in the box body, and the liquid leakage detection component is suitable for communicating with the control device so that the control device controls the alarm device to work; A liquid discharge member is disposed in the box body and is fixedly mounted on the bottom wall of the box body.

2. The battery according to claim 1, wherein The height of the detection end of the leakage detection member is lower than the height of the discharge port of the discharge member.

3. The battery according to claim 2, wherein The height of the drainage port of the drainage member is lower than the lowest height of the high-pressure device in the box.

4. The battery according to any one of claims 1 to 3, wherein The liquid discharge member is arranged at the lowest position of the inner surface of the bottom wall of the box body, and the liquid leakage detection member corresponds to the lowest position of the inner surface of the bottom wall of the box body.

5. The battery according to any one of claims 1 to 4, wherein The bottom wall of the box body is formed with a groove structure which is recessed toward the outside of the box body, and the detection end of the liquid leakage detection element is located in the groove structure.

6. The battery according to claim 5, wherein The liquid discharge member is arranged in the groove structure.

7. The battery according to any one of claims 1 to 6, wherein The liquid leakage detection component is spaced apart from the bottom wall of the box body.

8. The battery according to any one of claims 1 to 7, wherein There are multiple leakage detection components, which are connected in parallel and are located at different positions in the box.

9. The battery according to claim 8, wherein There are multiple liquid discharge components, and one liquid leakage detection component is arranged corresponding to at least one liquid discharge component.

10. The battery according to any one of claims 1 to 9, wherein The liquid leakage detection component is fixedly arranged on the box body.

11. A battery management system, wherein: include: A battery, wherein the battery is a battery according to any one of claims 1 to 10; A control device and an alarm device, wherein the control device is in communication connection with the liquid leakage detection component and the alarm device, and the control device controls the alarm device to work according to the detection information of the liquid leakage detection component.

12. The battery management system according to claim 11, wherein: The alarm device is a sound alarm device and / or a light alarm device.

13. An electrical device, wherein: Comprising a battery management system according to claim 11 or 12.

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