Energy storage device, control method for energy storage device, and electric device

Abstract

An energy storage device, a control method for an energy storage device, and an electric device. The energy storage device comprises a battery (21), an energy storage device positive electrode end (22), an energy storage device negative electrode end (23), and an on-off device (24); when the state of the battery (21) is normal, the energy storage device supplies power to the electric device through a first loop, wherein the first loop comprises the energy storage device positive electrode end (22), the energy storage device negative electrode end (23), a positive electrode end of the battery (21), and a negative electrode end of the battery (21); and when the state of the battery (21) is abnormal, the on-off device (24) is in an on state, and the energy storage device supplies power to the electric device through a second loop, wherein the second loop comprises the energy storage device positive electrode end (22), the energy storage device negative electrode end (23), the positive electrode end of the battery (21), the negative electrode end of the battery (21), and the on-off device (24). When the energy storage device is used in the whole vehicle, the energy storage device can still supply power to the whole vehicle through the second loop when the state of the battery (21) is abnormal, thereby reducing the probability of traffic accidents caused by power loss of the whole vehicle.

Description

Energy storage device, control method of energy storage device and power consumption device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410051496.9, filed on January 15, 2024, entitled “Energy storage device, control method for energy storage device, and electrical device,” and the entire contents of that application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of batteries, and in particular to an energy storage device, a control method for an energy storage device, and an electrical device. Background Art

[0004] As new energy power batteries are increasingly used in automobiles, ships, aerospace and other fields, the power supply reliability of power batteries is receiving more and more attention.

[0005] Taking electric vehicles as an example, the power battery forms a high-voltage power supply circuit when powering the electric vehicle. If an abnormality occurs in the power battery, the high-voltage power supply circuit will be disconnected, and the power battery will stop supplying power, thereby preventing further safety accidents caused by battery deterioration. However, based on practical considerations, if the power battery of an electric vehicle stops supplying power due to an abnormality while the vehicle is traveling at high speed, the electric vehicle will immediately lose power, which may lead to a more serious traffic accident.

[0006] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art.

[0007] Summary of the Invention

[0008] In view of the above problems, the embodiments of the present application provide an energy storage device, a control method for the energy storage device, and an electrical device, in order to reduce the safety hazards caused by the battery stopping power supply under abnormal circumstances.

[0009] In a first aspect, the present application provides an energy storage device, comprising:

[0010] A battery, a positive terminal of an energy storage device, a negative terminal of an energy storage device, and a switching device;

[0011] When the battery is in a normal state, the energy storage device provides power to the power-consuming device through a first circuit, wherein the first circuit includes a positive terminal of the energy storage device, a negative terminal of the energy storage device, a positive terminal of the battery, and a negative terminal of the battery;

[0012] When the battery is in an abnormal state, the switching device is in an on state, and the energy storage device provides power to the power-consuming device through a second circuit, wherein the second circuit includes a positive terminal of the energy storage device, a negative terminal of the energy storage device, a positive terminal of the battery, a negative terminal of the battery, and the switching device;

[0013] Wherein, in both the normal state and the abnormal state, the energy storage device provides power to the electrical device through the same battery.

[0014] In the solution provided in this embodiment, since the energy storage device can provide power to the power-consuming device through the second circuit when the battery is in an abnormal state, when the energy storage device is used in a vehicle, even if the battery is in an abnormal state, the energy storage device can still supply power to the vehicle through the second circuit, thereby reducing the probability of traffic accidents caused by power loss.

[0015] In some embodiments, the energy storage device further comprises:

[0016] a switchgear belonging to the first circuit;

[0017] When the battery is in a normal state, the switch device is in an on state.

[0018] The solution provided in this embodiment designs a switch device in the first circuit, which helps to improve the reliability of power supply of the energy storage device or reduce the power consumption of the first circuit.

[0019] In some embodiments, the switch device comprises:

[0020] a first switch sub-device and a second switch sub-device;

[0021] The first switch sub-device is connected to the positive terminal of the energy storage device and the positive terminal of the battery respectively, and the second switch sub-device is connected to the negative terminal of the energy storage device and the negative terminal of the battery respectively.

[0022] In the solution provided in this embodiment, the switching device is implemented by two devices, the first switching sub-device and the second switching sub-device, which helps to improve the reliability of the on-off of the first circuit.

[0023] In some embodiments, the switching device is connected in parallel with the on-off device.

[0024] In the solution provided in this embodiment, the switch device and the on-off device are designed to be connected in parallel, which helps to simplify the operation of connecting the switch device to the energy storage device.

[0025] In some embodiments, the on-off device comprises:

[0026] a first on-off sub-device and a second on-off sub-device;

[0027] The first on-off sub-device is connected to the positive terminal of the energy storage device and the positive terminal of the battery respectively, and the second on-off sub-device is connected to the negative terminal of the energy storage device and the negative terminal of the battery respectively.

[0028] In the solution provided by this embodiment, the first switching sub-device and the second switching sub-device are designed to implement the switching device, which helps to improve the reliability of the switching of the second circuit.

[0029] In some embodiments, the on-off device comprises:

[0030] Thermistor;

[0031] The conduction temperature of the thermistor is greater than the upper limit of the battery's tolerance temperature.

[0032] In the technical solution provided by this embodiment, the on-off device is implemented using a thermistor, which helps to simplify the structure of the energy storage device.

[0033] In some embodiments, the on-off device comprises:

[0034] a housing, a first electrical connection body, a second electrical connection body, and a moving device;

[0035] The moving device is arranged in the shell and divides the enclosed space formed by the shell into at least two cavities; the moving device is capable of moving along the inner wall of the shell;

[0036] The first connecting end of the first electrical connector and the second connecting end of the second electrical connector are placed in the same cavity of the at least two cavities; the third connecting end of the first electrical connector is connected to the energy storage device, and the fourth connecting end of the second electrical connector is connected to the battery;

[0037] When the moving device is in contact with the first connection end and the second connection end, the switching device is in a conducting state.

[0038] In the technical solution provided in this embodiment, a switching device including a first electrical connector, a second electrical connector and a moving device is designed. The switching device has simple components and low cost, which helps to reduce the cost of the energy storage device.

[0039] In some embodiments, the mobile device comprises:

[0040] A first movable plate and a vent hole are provided on the remaining cavity, wherein the remaining cavity is a cavity in the at least two cavities where the first connecting end and the second connecting end are not placed.

[0041] In the solution provided in this embodiment, by providing air holes on the remaining cavity, it is helpful to make the on-off device spontaneously turn on based on the change of air pressure when the battery suffers from thermal runaway.

[0042] In some embodiments, the mobile device comprises:

[0043] a first movable plate;

[0044] The thermal expansion material is placed in the remaining cavity, and the remaining cavity is the cavity in the at least two cavities where the first connecting end and the second connecting end are not placed.

[0045] In the solution provided in this embodiment, a thermal expansion material is placed in the remaining cavity, which helps to make the on-off device spontaneously turn on based on temperature changes when the battery suffers from thermal runaway.

[0046] In some embodiments, the first electrical connection body is disposed perpendicularly to the first movable plate, and the second electrical connection body is disposed perpendicularly to the first movable plate;

[0047] The first movable plate comprises:

[0048] A conductive plate and an insulating plate supporting the conductive plate;

[0049] The conductive plate is supported on a side of the insulating plate close to the first connecting end and the second connecting end.

[0050] In the solution provided in this embodiment, the first electrical connector, the second electrical connector and the first movable plate are arranged in a vertical layout, which is simple and easy to implement.

[0051] In some embodiments, the mobile device further comprises:

[0052] a second movable plate;

[0053] The first movable plate, the second movable plate, the first electrical connector and the second electrical connector are arranged parallel to each other; the first movable plate is connected to the first electrical connector, and the second movable plate is connected to the second electrical connector; the first connecting end and the second connecting end are placed in the cavity surrounded by the first movable plate, the second movable plate and the shell.

[0054] In the solution provided in this embodiment, the first electrical connector, the second electrical connector, the first movable plate and the second movable plate are arranged in parallel, which is simple and easy to implement.

[0055] In some embodiments, it further includes:

[0056] a control device connected to the battery and the switching device respectively;

[0057] The control device is used to control the on-off device to be turned on when it is determined that the state of the battery is abnormal.

[0058] In the solution provided by this embodiment, a control device is used to control the conduction of the on-off device, which helps to improve the reliability of the operation of the on-off device.

[0059] In a second aspect, the present application provides a control method for an energy storage device, which is applied to the energy storage device including the control device in the first aspect, the method comprising:

[0060] Acquiring electrical parameters for characterizing a state of the battery;

[0061] When it is determined based on the electrical parameters that the state of the battery meets a preset abnormal condition, the switching device is controlled to be turned on.

[0062] In the solution provided by this embodiment, the control device determines whether the battery state is abnormal based on the electrical parameters, and controls the on-off device to conduct, which helps to improve the reliability of the on-off device.

[0063] In some embodiments, it further includes:

[0064] When it is determined based on the electrical parameter that the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition, the switching device is controlled to be turned off.

[0065] In the solution provided by this embodiment, when the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition, the on-off device is controlled to be turned off, which is conducive to subsequent safe fire protection of the battery.

[0066] In some embodiments, determining, based on the electrical parameter, that the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition includes:

[0067] When the electrical parameter indicates that the external load of the battery meets a power consumption stop condition, it is determined that the state of the battery is switched from meeting the preset abnormal condition to meeting the preset normal condition.

[0068] In the solution provided by this embodiment, when the external load meets the power consumption stop condition, it is determined that the battery status meets the preset normal condition, which is helpful for subsequent disposal of the battery.

[0069] In a third aspect, the present application provides an electrical device, characterized in that the electrical device includes the energy storage device as described in the first aspect.

[0070] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. Throughout the accompanying drawings, the same reference numerals are used to denote the same components.

[0072] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0073] FIG2 is a schematic structural diagram of an energy storage device according to some embodiments of the present application;

[0074] FIG3( a ) is a cross-sectional view of a switching device according to some embodiments of the present application;

[0075] FIG3( b ) is a top view of a switching device according to some embodiments of the present application;

[0076] FIG4 is a cross-sectional view of a switching device according to some embodiments of the present application;

[0077] FIG5( a ) is a cross-sectional view of a switching device according to some embodiments of the present application;

[0078] FIG5( b ) is a top view of a switching device according to some embodiments of the present application;

[0079] FIG6 is a cross-sectional view of a switching device according to some embodiments of the present application;

[0080] FIG7 is a schematic structural diagram of an electrical device according to some embodiments of the present application;

[0081] FIG8 is a flow chart of a control method for an energy storage device according to some embodiments of the present application;

[0082] FIG9 is a schematic structural diagram of a control device for an energy storage device according to some embodiments of the present application;

[0083] FIG10 is a schematic structural diagram of an electrical device according to some embodiments of the present application;

[0084] FIG11 is a schematic diagram of the structure of a computer-readable storage medium according to some embodiments of the present application. DETAILED DESCRIPTION

[0085] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0087] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0088] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0089] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0090] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0091] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0092] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0093] As new energy power batteries are increasingly used in automobiles, ships, aerospace and other fields, the power supply reliability of power batteries is receiving more and more attention.

[0094] Taking electric vehicles as an example, the power battery forms a high-voltage power supply circuit when powering the electric vehicle. If an abnormality occurs in the power battery, the high-voltage power supply circuit will be disconnected, and the power battery will stop supplying power, thereby preventing further safety accidents caused by battery deterioration. However, based on practical considerations, if the power battery of an electric vehicle stops supplying power due to an abnormality while the vehicle is traveling at high speed, the electric vehicle will immediately lose power, which may lead to a more serious traffic accident.

[0095] In order to alleviate the problem in the related art that when the battery is abnormal, the power battery stops supplying power, which may cause a serious traffic accident for the entire vehicle, the embodiments of the present application provide an energy storage device, a control method for the energy storage device, and an electric device. The energy storage device includes a battery, a positive terminal of the energy storage device, a negative terminal of the energy storage device, and a switching device. When the battery is in a normal state, the energy storage device provides power to the electric device through a first circuit, and the first circuit includes the positive terminal of the energy storage device, the negative terminal of the energy storage device, the positive terminal of the battery, and the negative terminal of the battery. When the battery is in an abnormal state, the switching device is in a conductive state, and the energy storage device provides power to the electric device through a second circuit, and the second circuit includes the positive terminal of the energy storage device, the negative terminal of the energy storage device, the positive terminal of the battery, the negative terminal of the battery, and the switching device. Since the energy storage device can provide power to the electric device through the second circuit when the battery is in an abnormal state, when the energy storage device is used on the entire vehicle, even if the battery is in an abnormal state, the energy storage device can still supply power to the entire vehicle through the second circuit, thereby reducing the probability of the entire vehicle causing a traffic accident due to power loss.

[0096] The energy storage devices disclosed in the embodiments of this application include, but are not limited to, applications in electrical devices such as vehicles, ships, and aircraft. The energy storage devices disclosed in this application can be used to form a power supply system for such electrical devices. This helps alleviate the problem of power loss in the event of battery failure, which can lead to safety accidents.

[0097] The embodiments of the present application provide an electrical device that uses an energy storage device as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0098] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0099] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0100] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0101] In one or more embodiments of the present application, as shown in FIG2 , the energy storage device may include:

[0102] Battery 21, energy storage device positive terminal 22, energy storage device negative terminal 23, and switching device 24;

[0103] When the battery 21 is in normal condition, the energy storage device provides power to the power-consuming device through the first circuit, which includes the positive terminal 22 of the energy storage device, the negative terminal 23 of the energy storage device, the positive terminal of the battery 21, and the negative terminal of the battery 21;

[0104] When the battery 21 is in an abnormal state, the on-off device 24 is in the on state, and the energy storage device provides power to the power-consuming device through the second circuit. The second circuit includes the positive terminal 22 of the energy storage device, the negative terminal 23 of the energy storage device, the positive terminal of the battery 21, the negative terminal of the battery 21, and the on-off device 24;

[0105] The energy storage device provides power to the electrical device through the same battery 21 in both normal and abnormal conditions.

[0106] In this embodiment, battery 21 is a component of the energy storage device. In addition to battery 21, the energy storage device also includes a positive terminal 22 of the energy storage device, a negative terminal 23 of the energy storage device, and a switching device 24. The positive terminal of battery 21 is connected to the positive terminal 22 of the energy storage device, the negative terminal of battery 21 is connected to the negative terminal 23 of the energy storage device, and the positive terminal 22 and the negative terminal 23 of the energy storage device are connected to the power-consuming device, thus forming a first circuit. The switching device 24 can be connected in parallel to the connection line between the positive terminal of battery 21 and the positive terminal 22 of the energy storage device, and / or the switching device 24 can be connected in parallel to the connection line between the negative terminal of battery 21 and the negative terminal 23 of the energy storage device, thereby forming a second circuit different from the first circuit.

[0107] In some embodiments of the present application, the battery 21 may include, but is not limited to, a battery module or battery pack, and may include multiple cells. An abnormal state of the battery 21 may include, but is not limited to, unstable voltage of the battery 21, thermal imbalance or thermal runaway caused by excessive temperatures in individual cells of the battery 21, or short circuits or other electrical failures in individual cells of the battery 21. It should be understood that when the battery 21 is in an abnormal state, parameters such as the temperature and current of the battery 21 may change. Furthermore, if the abnormal state of the battery 21 is caused by thermal runaway, the gas pressure within the energy storage device may also change due to the generation of high-pressure gas in the battery 21 during thermal runaway. Even when the battery 21 is in such an abnormal state, it can still supply power, but supplying power externally may exacerbate the abnormality. As long as power is not supplied externally for an extended period during the abnormal state, the probability of an accident resulting from the abnormal state of the battery 21 is low.

[0108] When the battery 21 is in normal condition, the battery 21 supplies power to the electrical device via the first circuit. In related art, when the battery 21 is in abnormal condition, the control module of the electrical device, the battery 21, or the energy storage device may detect the abnormal condition of the battery 21 and may control the first circuit to disconnect, causing the battery 21 to be unable to continue to supply power to the electrical device. In this case, the electrical device will lose power. Sudden power loss during operation of the electrical device may cause a safety accident. For example, if the first circuit is suddenly disconnected while an electric vehicle is driving, the electric vehicle loses power, which can easily cause a traffic accident.

[0109] In some embodiments of the present application, when the battery 21 is in an abnormal state, the on-off device 24 is in a conducting state, closing the second circuit, and the battery 21 can supply power to the electrical device through the second circuit. In this way, when the battery 21 is in an abnormal state, the battery 21 can still supply power to the electrical device, and the electrical device will not suddenly lose power, thereby reducing the possibility of safety accidents caused by sudden power outage of the electrical device. For example, if the battery of an electric vehicle is abnormal while driving and the first circuit is disconnected, the battery can provide power to the electric vehicle through the second circuit, and the driver can drive the electric vehicle to a safe area and park it, thereby reducing the possibility of traffic accidents caused by sudden power loss due to battery abnormality.

[0110] In this embodiment, the first circuit may include an on-off device. In this case, the first circuit is the same as the second circuit, that is, regardless of whether the battery is in normal or abnormal condition, the energy storage device can provide power to the electrical device through the second circuit. The on-off device can be connected between the positive terminal of the energy storage device and the positive terminal of the battery, or the on-off device is connected between the negative terminal of the energy storage device and the negative terminal of the battery, or the on-off device is connected between the positive terminal of the energy storage device and the positive terminal of the battery, and at the same time, between the negative terminal of the energy storage device and the negative terminal of the battery. The first circuit may also not include an on-off device. In this case, when the battery is in normal condition, the energy storage device provides power to the electrical device through the first circuit, and when the battery is in abnormal condition, the energy storage device provides power to the electrical device through the second circuit.

[0111] In this embodiment, in the second circuit, the on-off device can be connected between the positive terminal of the energy storage device and the positive terminal of the battery, or the on-off device can be connected between the negative terminal of the energy storage device and the negative terminal of the battery, or the on-off device can be connected between the positive terminal of the energy storage device and the positive terminal of the battery, and at the same time connected between the negative terminal of the energy storage device and the negative terminal of the battery.

[0112] In the solution provided in this embodiment, since the energy storage device can provide power to the power-consuming device through the second circuit when the battery is in an abnormal state, when the energy storage device is used in a vehicle, even if the battery is in an abnormal state, the energy storage device can still supply power to the vehicle through the second circuit, thereby reducing the probability of traffic accidents caused by power loss.

[0113] In one or more embodiments of the present application, as shown in FIG2 , the energy storage device further includes:

[0114] Switching device 25 belonging to the first circuit;

[0115] When the battery is in a normal state, the switch device 25 is in an on state.

[0116] It will be understood that in this case no switching device is included in the first circuit.

[0117] In the event of an abnormal battery condition, the switch device 25 can be in either the on or off state. In the event of an abnormal battery condition, if the switch device 25 is in the on state, both the first circuit and the second circuit can provide power to the power-consuming device. The first circuit and the second circuit serve as backup for each other, thereby improving the reliability of external power supply. In the event of an abnormal battery condition, if the switch device 25 is in the off state, the first circuit does not provide power to the power-consuming device, and power is provided to the power-consuming device through the second circuit. This design can save power consumption caused by the switch device.

[0118] In this embodiment, the switch device 25 includes but is not limited to a fuse, a relay, etc.

[0119] The solution provided in this embodiment designs a switch device in the first circuit, which helps to improve the reliability of power supply of the energy storage device or reduce the power consumption of the first circuit.

[0120] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0121] In one or more embodiments of the present application, as shown in FIG2 , the switch device 25 includes:

[0122] a first switch sub-device 251 and a second switch sub-device 252;

[0123] The first switch sub-device 251 is connected to the positive terminal 22 of the energy storage device and the positive terminal of the battery 21 respectively, and the second switch sub-device 252 is connected to the negative terminal 23 of the energy storage device and the negative terminal of the battery 21 respectively.

[0124] In the solution provided in this embodiment, the switching device is implemented by two devices, the first switching sub-device and the second switching sub-device, which helps to improve the reliability of the on-off of the first circuit.

[0125] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0126] In one or more embodiments of the present application, the switch device 25 is connected in parallel with the on-off device 24 .

[0127] In the solution provided in this embodiment, the switch device and the on-off device are designed to be connected in parallel, which helps to simplify the operation of connecting the switch device to the energy storage device.

[0128] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0129] In one or more embodiments of the present application, as shown in FIG2 , the on-off device 24 includes:

[0130] A first on-off sub-device 241 and a second on-off sub-device 242;

[0131] The first on-off sub-device 241 is connected to the positive terminal 22 of the energy storage device and the positive terminal of the battery 21 respectively, and the second on-off sub-device 242 is connected to the negative terminal 23 of the energy storage device and the negative terminal of the battery 21 respectively.

[0132] In the solution provided by this embodiment, the first switching sub-device and the second switching sub-device are designed to implement the switching device, which helps to improve the reliability of the switching of the second circuit.

[0133] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0134] In one or more embodiments of the present application, the on-off device includes:

[0135] Thermistor;

[0136] The conduction temperature of the thermistor is greater than the upper temperature limit of the battery.

[0137] A thermistor is a sensor resistor whose resistance changes with temperature. At low temperatures, the thermistor's resistance increases dramatically, and the thermistor remains in an insulating state. At high temperatures, the thermistor's resistance drops rapidly, and the thermistor becomes conductive. The thermistor's conduction temperature characterizes its insulation performance. When the ambient temperature is greater than the conduction temperature, the thermistor is conductive; when the ambient temperature is less than or equal to the conduction temperature, the thermistor is in an insulating state.

[0138] Batteries in energy storage devices typically have a reasonable operating temperature range. When the battery temperature is within this range, the battery has high charge and discharge efficiency and can be charged and discharged safely. When the battery temperature exceeds this range, the battery's charge and discharge efficiency is low and the battery often cannot operate safely. The upper temperature tolerance limit in this embodiment refers to the maximum value within the reasonable operating temperature range. When the battery temperature exceeds the upper temperature tolerance limit, the battery will experience thermal runaway.

[0139] When a battery experiences thermal runaway, its temperature quickly exceeds the upper temperature limit. In this case, the thermistor is in the on state. For example, if the upper temperature limit is 55°C, when the battery experiences thermal runaway, its temperature quickly exceeds 55°C, causing the thermistor's resistance to drop rapidly, and the thermistor is in the on state. When the thermal runaway ends and the battery temperature drops below 55°C, the thermistor's resistance increases again until it becomes insulated.

[0140] In the technical solution provided by this embodiment, the on-off device is implemented using a thermistor, which helps to simplify the structure of the energy storage device.

[0141] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0142] In one or more embodiments of the present application, the on-off device may include:

[0143] a housing, a first electrical connection body, a second electrical connection body, and a moving device;

[0144] The moving device is arranged in the shell and divides the enclosed space formed by the shell into at least two cavities; the moving device can move along the inner wall of the shell;

[0145] The first connecting end of the first electrical connector and the second connecting end of the second electrical connector are placed in the same cavity of the at least two cavities;

[0146] The third connection end of the first electrical connector is connected to the energy storage device, and the fourth connection end of the second electrical connector is connected to the battery;

[0147] When the moving device is in contact with the first connection end and the second connection end, the switching device is in a conducting state.

[0148] It should be understood that when the on-off device is connected to the negative terminal of the energy storage device and the negative terminal of the battery, the third connection terminal of the first electrical connector is connected to the negative terminal of the energy storage device, and the fourth connection terminal of the second electrical connector is connected to the negative terminal of the battery; when the on-off device is connected to the positive terminal of the energy storage device and the positive terminal of the battery, the third connection terminal of the first electrical connector is connected to the positive terminal of the energy storage device, and the fourth connection terminal of the second electrical connector is connected to the positive terminal of the battery.

[0149] It should be understood that the third connection end and the fourth connection end may be placed in the same cavity as the first connection end and the second connection end, or may be placed outside the switching device.

[0150] In this embodiment, when the mobile device is in contact with the first and second connection terminals, if the first and second connection terminals are in direct contact, then the first and second electrical connectors and the battery form an electrical path, allowing the battery to discharge externally through this electrical path. If the first and second connection terminals are in indirect contact through the mobile device, then the mobile device, the first and second electrical connectors, and the battery form an electrical path, allowing the battery to discharge externally through this electrical path.

[0151] In application, the moving device can be implemented by a slide and a slide rail, the slide rail being disposed on the inner wall of the housing, and the slide can move along the slide rail. In this embodiment, as the moving device moves along the inner wall of the housing, the moving device approaches the first electrical connector and / or the second electrical connector, thereby achieving contact between the moving device and the first connection end and the second connection end.

[0152] Of course, in practical applications, the mobile device may also be made of a material with a relatively large deformation coefficient. As the environment in the cavity changes, the mobile device may undergo a large deformation, so that the mobile device contacts the first connection end and the second connection end.

[0153] In this embodiment, a BMS (battery management system) can be used to detect whether the battery status is abnormal, and if abnormality is determined, the mobile device is controlled to move or deform, thereby achieving contact between the mobile device and the first connection end and the second connection end.

[0154] In the technical solution provided in this embodiment, a switching device including a first electrical connector, a second electrical connector and a moving device is designed. The switching device has simple components and low cost, which helps to reduce the cost of the energy storage device.

[0155] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0156] In one or more embodiments of the present application, the mobile device may include:

[0157] The first movable plate and the air vents are arranged on the remaining cavity, and the remaining cavity is the cavity in which the first connecting end and the second connecting end are not placed in the at least two cavities.

[0158] It should be understood that in the event of thermal runaway of the battery, the battery will rapidly generate high-pressure gas, which will enter the remaining cavity through the air vents, causing the air pressure in the remaining cavity to be higher than that in the cavity where the first connection terminal and the second connection terminal are placed. Therefore, under the action of the air pressure difference, the first movable plate is pushed to move or deform, causing the space in the remaining cavity to become larger and the space in the cavity where the first connection terminal and the second connection terminal are placed to become smaller, and ultimately causing the first connection terminal and the second connection terminal to contact the mobile device. After the thermal runaway of the battery is resolved, the battery gradually reduces the generation of high-pressure gas. Accordingly, the high-pressure gas that enters the remaining cavity through the air vents gradually decreases, and the pressure difference between the remaining cavity and the cavity where the first connection terminal and the second connection terminal are placed gradually decreases, ultimately causing the first connection terminal and the second connection terminal to disconnect.

[0159] It should be understood that when there are multiple remaining cavities, in order to improve the reliability of the operation of the on-off device, a vent hole can be provided on each remaining cavity.

[0160] In the solution provided in this embodiment, by providing air holes on the remaining cavity, it is helpful to make the on-off device spontaneously turn on based on the change of air pressure when the battery suffers from thermal runaway.

[0161] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0162] In one or more embodiments of the present application, the mobile device includes:

[0163] a first movable plate;

[0164] The thermal expansion material is placed in the remaining cavity, and the remaining cavity is a cavity in the at least two cavities where the first connecting end and the second connecting end are not placed.

[0165] Thermal expansion materials expand as the ambient temperature rises and shrink as the ambient temperature drops. If the battery experiences thermal runaway, the thermal expansion material in the remaining cavity expands, pushing the first movable plate to move or deform, allowing the first connection end to contact the second connection end, thereby forming an electrical path for the battery to discharge electricity. Once the battery's thermal runaway condition is resolved, the thermal expansion material in the remaining cavity shrinks, pushing the first movable plate in the opposite direction.

[0166] In practical applications, thermal expansion materials include but are not limited to expansion alloys and the like.

[0167] It should be understood that when there are multiple remaining cavities, in order to improve the reliability of the operation of the switching device, a thermal expansion material can be placed in each of the remaining cavities.

[0168] In the solution provided in this embodiment, a thermal expansion material is placed in the remaining cavity, which helps to make the on-off device spontaneously turn on based on temperature changes when the battery suffers from thermal runaway.

[0169] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0170] In one or more embodiments of the present application, the first electrical connector is disposed perpendicularly to the first movable plate, and the second electrical connector is disposed perpendicularly to the first movable plate;

[0171] The first movable plate comprises:

[0172] a conductive plate and an insulating plate supporting the conductive plate;

[0173] The conductive plate is supported on one side of the insulating plate close to the first connecting end and the second connecting end.

[0174] In this embodiment, when the first movable plate is in contact with the first and second connection ends, the first and second connection ends are both connected to the conductive plate, and the first and second connection ends, together with the conductive plate, form an electrical path. It should be understood that the area of ​​the conductive plate is less than or equal to the area of ​​the insulating plate.

[0175] It should be understood that in practical applications, the first movable plate can be directly implemented by a conductive plate, that is, the entire first movable plate is a conductive plate.

[0176] In the solution provided in this embodiment, the first electrical connector, the second electrical connector and the first movable plate are arranged in a vertical layout, which is simple and easy to implement.

[0177] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0178] As an example, a schematic diagram of a switching device as shown in FIG3( a ) and FIG3( b ) is provided. FIG3( a ) includes a housing 31 , a first electrical connector 32 , a second electrical connector 33 , a conductive plate 34 , and an insulating plate 35 ;

[0179] Among them, the insulating plate 35 is placed perpendicular to the first electrical connector 32 and the second electrical connector 33, and the first electrical connector 32 and the second electrical connector 33 are placed parallel to each other. The insulating plate 35 divides the enclosed space surrounded by the shell 31 into a first cavity and a second cavity. The first connection end of the first electrical connector 32 and the second connection end of the second electrical connector 33 are both placed in the first cavity, the third connection end of the first electrical connector 32 and the fourth connection end of the second electrical connector 33 are placed outside the shell, the conductive plate 34 is placed on the insulating plate 35 close to the first electrical connector 32 and the second electrical connector 33, and the second cavity is filled with easily expandable material.

[0180] When the battery experiences thermal runaway, the expandable material expands, pushing the insulating plate 35 and the conductive plate 34 toward the first and second electrical connectors 32 and 33 until the conductive plate 34 contacts the first and second connection ends, respectively, forming an electrical path between the first and second electrical connectors 32 and 33. When the battery recovers from thermal runaway, the expandable material decreases, and the insulating plate 35 pulls the conductive plate 34 away from the first and second electrical connectors 32 and 33, separating the conductive plate 34 from the first and second connection ends.

[0181] As an example, based on the structures of the on-off devices of Figures 3(a) and 3(b), a schematic diagram of an on-off device is provided in Figure 4. Compared to the on-off devices of Figures 3(a) and 3(b), the on-off device of Figure 4 has a second cavity provided with a vent hole 36. The second cavity may be filled with an expandable material or not.

[0182] The principle of the on-off device of Figure 4 will be explained using the example of a battery without an easily expandable material in the second cavity. In the event of thermal runaway, the battery generates high-pressure gas, which enters the second cavity through vent 36. The gas pressure in the second cavity is higher than that in the first cavity. Under the influence of this pressure differential, the insulating plate 35 drives the conductive plate 34 toward the first and second electrical connectors 32, 33 until the conductive plate 34 contacts the first and second connecting ends, respectively, forming an electrical path between the first and second electrical connectors 32, 34, and 33. When the battery's thermal runaway condition is resolved, the pressure differential between the first and second cavities gradually decreases, and the insulating plate 35 drives the conductive plate 34 away from the first and second electrical connectors 32, 33, separating the conductive plate 34 from the first and second connecting ends.

[0183] In one or more embodiments of the present application, the mobile device may further include:

[0184] a second movable plate;

[0185] The first movable plate, the second movable plate, the first electrical connector and the second electrical connector are arranged parallel to each other; the first movable plate is connected to the first electrical connector, and the second movable plate is connected to the second electrical connector; the first connecting end and the second connecting end are placed in the cavity surrounded by the first movable plate, the second movable plate and the shell.

[0186] In the solution provided in this embodiment, the first electrical connector, the second electrical connector, the first movable plate and the second movable plate are arranged in parallel, which is simple and easy to implement.

[0187] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0188] As an example, schematic diagrams of a switching device as shown in FIG5( a ) and FIG5 ( b ) are provided. The switching device of FIG5 includes a housing 51 , a first electrical connector 52 , a second electrical connector 53 , a first movable plate 54 , and a second movable plate 55 .

[0189] Among them, the first electrical connector 52, the second electrical connector 53, the first movable plate 54 and the second movable plate 55 are arranged parallel to each other, the first electrical connector 52 is connected to the first movable plate 54, and the second electrical connector 53 is connected to the second movable plate 55. The first movable plate 54 and the second movable plate 55 divide the enclosed space surrounded by the shell into three cavities (marked as the first cavity, the second cavity and the third cavity from left to right respectively), the first connection end and the second connection end are placed in the second cavity, the third connection end of the first electrical connector 52 and the fourth connection end of the second electrical connector 53 are placed outside the shell, and the first cavity and the third cavity are filled with easily expandable material.

[0190] When the battery experiences thermal runaway, the expandable material expands, pushing the first movable plate 54 and the second movable plate 55 toward each other until the first connection end of the first movable plate 54 and the second connection end of the second movable plate 55 come into contact, thereby forming an electrical path between the first electrical connector 52 and the second electrical connector 53. When the battery is released from thermal runaway, the expandable material decreases, causing the first movable plate 54 and the second movable plate 55 to move away from each other, breaking contact between the first connection end and the second connection end.

[0191] As an example, based on the structure of the on-off device of FIG5 , a schematic diagram of the on-off device as shown in FIG6 is provided. Compared with the on-off device of FIG5 , air holes 56 are provided on the first cavity and the third cavity in the on-off device of FIG6 .

[0192] When the battery experiences thermal runaway, it generates high-pressure gas, which enters the first and third cavities through the vents 56. The air pressure in both the first and third cavities is higher than that in the second cavity. Under the influence of this pressure differential, the first movable plate 54 and the second movable plate 55 move toward each other until the first connection end of the first movable plate 54 and the second connection end of the second movable plate 55 come into contact, thereby forming an electrical path between the first and second electrical connectors 52 and 53. When the battery's thermal runaway condition is resolved, the pressure differential between the first and second cavities decreases, and the pressure differential between the third and second cavities also decreases, causing the first and second movable plates 54 and 55 to move away from each other, disconnecting the first and second connection ends.

[0193] In one or more embodiments of the present application, the mobile device may further include:

[0194] A control device connected to the battery and the switching device respectively;

[0195] The control device is used to control the on-off device to be turned on when it is determined that the battery is in an abnormal state.

[0196] In applications, the control device can determine whether the battery state is abnormal based on the battery's electrical parameters such as voltage, temperature, and air pressure. For example, the electrical parameters can be compared with preset parameter thresholds. When the electrical parameters are greater than or equal to the parameter thresholds, the battery state is determined to be abnormal; when the electrical parameters are less than the parameter thresholds, the battery state is determined to be normal. In applications, in order to improve the power supply reliability of the battery, the on-off device can also be controlled to be turned on when the battery state is about to become abnormal. In specific implementation, when the battery's electrical parameters are less than the parameter threshold, and the absolute value of the difference between the electrical parameters and the parameter threshold is less than the absolute value threshold, it is determined that the battery state is about to become abnormal.

[0197] In this embodiment, the battery can actively report its electrical parameters to the control device, allowing the control device to determine whether the battery status is abnormal based on the electrical parameters. Of course, a monitoring device that communicates with both the battery and the control device can also be deployed, with the monitoring device actively collecting the battery's electrical parameters and reporting them to the control device. To reduce control costs, the control device can reuse the BMS in the energy storage device.

[0198] In the solution provided by this embodiment, a control device is used to control the conduction of the on-off device, which helps to improve the reliability of the operation of the on-off device.

[0199] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0200] One or more embodiments of the present application provide an electrical device, which includes the energy storage device in the aforementioned embodiment.

[0201] As an example, the following fully describes the power consumption device using a new energy electric vehicle. As shown in Figure 7, the power consumption device includes a vehicle load 71 and an energy storage device 72. The energy storage device 72 includes a battery 21, a first relay 251, a second relay 252, a first on-off device 241, and a second on-off device 242.

[0202] Among them, the first relay 251 and the first on-off device 241 are connected in parallel between the positive electrode of the battery 21 and the positive electrode of the energy storage device 72, and the second relay 252 and the second on-off device 242 are connected in parallel between the negative electrode of the battery 21 and the negative electrode of the energy storage device 72.

[0203] When the battery is in an abnormal state, the first relay 251 and the second relay 252 are in an off state, and the first on-off device 241 and the second on-off device 242 are in an on state.

[0204] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0205] In one or more embodiments of the present application, a control method for an energy storage device is provided. The method can be applied to the energy storage device including the control device in the aforementioned embodiment. As shown in FIG8 , the method may include the following steps:

[0206] Step 801: Obtain electrical parameters for characterizing a battery state;

[0207] Step 802: When it is determined based on the electrical parameters that the battery state meets a preset abnormal condition, control the on-off device to be turned on.

[0208] The preset abnormal condition indicates that the battery's electrical parameters have exceeded the threshold value of the battery's normal operating state. For example, assuming the battery's normal operating temperature range is (-20°C to 55°C), then if the battery temperature exceeds 55°C, the battery status can be determined to have met the preset abnormal condition.

[0209] The battery parameters include but are not limited to parameters such as air pressure and temperature.

[0210] In the solution provided by this embodiment, the control device determines whether the battery state is abnormal based on the electrical parameters, and controls the on-off device to conduct, which helps to improve the reliability of the on-off device operation.

[0211] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0212] In one or more embodiments of the present application, the method may further include:

[0213] When it is determined based on the electrical parameters that the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition, the on-off device is controlled to be turned off.

[0214] The preset normal condition is used to indicate that the electrical parameters of the battery meet the parameter thresholds of the battery under normal working conditions.

[0215] In the solution provided by this embodiment, when the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition, the on-off device is controlled to be turned off, which is conducive to subsequent safe fire protection of the battery.

[0216] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0217] In one or more embodiments of the present application, determining, based on electrical parameters, that a battery state switches from satisfying a preset abnormal condition to satisfying a preset normal condition includes:

[0218] When the electrical parameter indicates that the external load of the battery meets the power consumption stop condition, it is determined that the state of the battery is switched from meeting the preset abnormal condition to meeting the preset normal condition.

[0219] The power-off condition is used to indicate that the external load does not require the energy storage device's power output. For example, if the external load is a vehicle, the vehicle's stop, as monitored by electrical parameters, confirms that the external load has met the power-off condition.

[0220] In the solution provided by this embodiment, when the external load meets the power consumption stop condition, it is determined that the battery status meets the preset normal condition, which is helpful for subsequent disposal of the battery.

[0221] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0222] The present application also provides a control device for an energy storage device, as shown in FIG9 , which may include:

[0223] An acquisition module 91 is configured to acquire electrical parameters used to characterize the state of the battery;

[0224] The control module 92 is configured to control the on-off device to be turned on when it is determined based on the electrical parameters that the state of the battery meets a preset abnormal condition.

[0225] In some embodiments, the device is further configured to:

[0226] When it is determined based on the electrical parameter that the state of the battery switches from satisfying the preset abnormal condition to satisfying the preset normal condition, the switching device is controlled to be turned off.

[0227] In some embodiments, the device is used to:

[0228] When the electrical parameter indicates that the external load of the battery meets a power consumption stop condition, it is determined that the state of the battery is switched from meeting the preset abnormal condition to meeting the preset normal condition.

[0229] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0230] The embodiments of the present application also provide an electric device to execute the control method of the above-mentioned energy storage device. Please refer to Figure 10, which shows a schematic diagram of an electric device provided by some embodiments of the present application. As shown in Figure 10, the electric device 10 includes: a processor 800, a memory 801, a bus 802 and a communication interface 803, and the processor 800, the communication interface 803 and the memory 801 are connected via the bus 802; the memory 801 stores a computer program that can be run on the processor 800, and when the processor 800 runs the computer program, it executes the control method of the energy storage device provided by any of the aforementioned embodiments of the present application.

[0231] The memory 801 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is achieved through at least one communication interface 803 (which may be wired or wireless), and may use the Internet, a wide area network, a local area network, a metropolitan area network, etc.

[0232] The bus 802 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, and the like. The memory 801 is used to store programs, and the processor 800 executes the programs upon receiving execution instructions. The control method of the energy storage device disclosed in any of the aforementioned embodiments of the present application may be applied to the processor 800 or implemented by the processor 800.

[0233] The processor 800 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the processor 800 or by software instructions. The above processor 800 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of this application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory 801 , and the processor 800 reads the information in the memory 801 and completes the steps of the above method in combination with its hardware.

[0234] The electric device provided in the embodiment of the present application and the control method of the energy storage device provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, operated or implemented therein.

[0235] An embodiment of the present application also provides a computer-readable storage medium corresponding to the control method of the energy storage device provided in the aforementioned embodiment. Please refer to Figure 11, which shows that the computer-readable storage medium is a CD 30, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it will execute the control method of the energy storage device provided in any of the aforementioned embodiments.

[0236] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0237] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the control method of the energy storage device provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0238] It should be noted that:

[0239] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0240] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following schematic diagram: the claimed application requires more features than the features expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0241] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0242] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy storage device, characterized in that, Comprising: A battery, a positive extreme of the energy storage device, a negative extreme of the energy storage device, and a switching device; When the state of the battery is normal, the energy storage device supplies power to the electrical device through a first circuit, and the first circuit includes the positive extreme of the energy storage device, the negative extreme of the energy storage device, the positive extreme of the battery, and the negative extreme of the battery; When the state of the battery is abnormal, the switching device is in a conducting state, and the energy storage device supplies power to the electrical device through a second circuit, and the second circuit includes the positive extreme of the energy storage device, the negative extreme of the energy storage device, the positive extreme of the battery, the negative extreme of the battery, and the switching device; Wherein, in the case of the normal state and the abnormal state, the energy storage device supplies power to the electrical device through the same battery.

2. The energy storage device according to claim 1, characterized in that, The energy storage device further includes: A switching device belonging to the first circuit; When the state of the battery is normal, the switching device is in a conducting state.

3. The energy storage device according to claim 2, characterized in that, The switching device includes: A first switching sub-device and a second switching sub-device; The first switching sub-device is respectively connected to the positive extreme of the energy storage device and the positive extreme of the battery, and the second switching sub-device is respectively connected to the negative extreme of the energy storage device and the negative extreme of the battery.

4. The energy storage device according to claim 2 or 3, characterized in that, The switching device is connected in parallel with the switching device.

5. The energy storage device according to any one of claims 1-4, characterized in that, The switching device includes: A first switching and disconnecting sub-device and a second switching and disconnecting sub-device; The first switching and disconnecting sub-device is respectively connected to the positive extreme of the energy storage device and the positive extreme of the battery, and the second switching and disconnecting sub-device is respectively connected to the negative extreme of the energy storage device and the negative extreme of the battery.

6. The energy storage device according to any one of claims 1-5, characterized in that, The switching device includes: A thermistor; The conduction temperature of the thermistor is greater than the upper limit of the tolerance temperature of the battery.

7. The energy storage device according to any one of claims 1-5, characterized in that, The switching device includes: A housing, a first electrical connector, a second electrical connector, and a moving device; The moving device is disposed within the housing and divides the enclosed space formed by the housing into at least two cavities; the moving device is capable of moving along the inner wall of the housing; The first connection end of the first electrical connector and the second connection end of the second electrical connector are placed in the same cavity of the at least two cavities; the third connection end of the first electrical connector is connected to the energy storage device, and the fourth connection end of the second electrical connector is connected to the battery; When the moving device contacts the first connection end and the second connection end, the switching device is in a conducting state.

8. The energy storage device according to claim 7, characterized in that, The moving device includes: A first movable plate and a vent hole provided on the remaining cavity, and the remaining cavity is the cavity among the at least two cavities where the first connection end and the second connection end are not placed.

9. The energy storage device according to claim 7, characterized in that, The moving device includes: A first movable plate; Wherein, a thermal expansion material is placed in the remaining cavity, and the remaining cavity is the cavity among the at least two cavities where the first connection end and the second connection end are not placed.

10. The energy storage device according to claim 8 or 9, characterized in that, The first electrical connector is disposed perpendicular to the first movable plate, and the second electrical connector is disposed perpendicular to the first movable plate; The first movable plate includes: A conductive plate and an insulating plate carrying the conductive plate; The conductive plate is carried on one side of the insulating plate close to the first connection end and the second connection end.

11. The energy storage device according to any one of claims 8-10, characterized in that, The mobile device further includes: A second movable plate; The first movable plate, the second movable plate, the first electrical connection body and the second electrical connection body are arranged parallel to each other; the first movable plate is connected to the first electrical connection body, and the second movable plate is connected to the second electrical connection body; the first connection end and the second connection end are placed in the cavity formed by the first movable plate, the second movable plate and the housing.

12. The energy storage device according to any one of claims 1-11, characterized in that, It further includes: A control device respectively connected to the battery and the on-off device; The control device is configured to control the on-off device to conduct when it is determined that the state of the battery is abnormal.

13. A control method for an energy storage device, characterized in that, Applied to the energy storage device according to claim 12, the method includes: Obtaining an electrical parameter for characterizing the state of the battery; When it is determined based on the electrical parameter that the state of the battery meets a preset abnormal condition, controlling the on-off device to conduct.

14. The method according to claim 13, wherein It further includes: When it is determined based on the electrical parameter that the state of the battery changes from meeting the preset abnormal condition to meeting the preset normal condition, controlling the on-off device to turn off.

15. The method according to claim 14, wherein Determining that the state of the battery changes from meeting the preset abnormal condition to meeting the preset normal condition based on the electrical parameter includes: When the electrical parameter indicates that the external load of the battery meets the power consumption stop condition, determining that the state of the battery changes from meeting the preset abnormal condition to meeting the preset normal condition.

16. An electrical device, characterized in that, The electrical device includes the energy storage device according to any one of claims 1-12.

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