Method and apparatus for controlling battery

Abstract

Embodiments of the present application provide a method and apparatus for controlling a battery, which can improve the reliability of supplying power to an electrical device by the battery. The method for controlling a battery is applicable to a battery management system, and comprises: sending first state information, the first state information being used for indicating that a battery is in a first abnormal state; and receiving first control information, the first control information being determined by the first state information, and the first control information being used for instructing the battery management system to control the battery to be in a closed state in a first time period.

Description

Method and device for controlling battery

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410150478.6, filed on February 2, 2024, entitled “Method and Device for Controlling Batteries,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of the present application relate to the field of batteries, and more specifically, to a method and apparatus for controlling a battery. Background Art

[0004] With the rapid development of electric vehicle technology, electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0005] With the development of battery technology, various battery performance indicators are constantly improving. As batteries provide power to electrical devices, the reliability of their electrical performance is a key factor in measuring battery quality. Therefore, improving battery reliability remains an unresolved issue.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a method and apparatus for controlling a battery, which can improve the reliability of the battery in supplying power to electrical equipment.

[0008] In a first aspect, a method for controlling a battery is provided, which is applied to a battery management system, including: sending first status information, where the first status information is used to indicate that the battery is in a first abnormal state; receiving first control information, where the first control information is determined by the first status information, and the first control information is used to instruct the battery management system to control the battery to be in a closed state within a first time period.

[0009] In an embodiment of the present application, the battery management system can receive instructions from the battery system controller when the battery is in an abnormal state, and control the battery to be in a closed state within a certain period of time after the battery fails, to supply power to the vehicle, so that the vehicle has sufficient power to dock, and reduce the possibility of the vehicle losing power due to sudden power failure of the battery, thereby causing an accident. At the same time, the BMS controls the battery to continuously supply power to the vehicle, which is beneficial for the thermal management component to continuously cool the battery, inhibit the heat diffusion inside the battery, reduce the possibility of further damage to the battery, and can reduce the battery power to facilitate subsequent repair or replacement of the battery. The battery's continuous power supply to the vehicle can also extend the vehicle's sound and light alarm time, providing assistance to the user. The embodiment of the present application can improve the reliability of the battery as a whole, reduce the risk of serious accidents, and thus improve the user experience.

[0010] In some embodiments, the method further includes: receiving second control information, wherein the second control information is used to instruct the battery management system to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period, and the start time of the second time period is the same as the end time of the first time period.

[0011] The battery is in a disconnected state during the second time period, which can promptly disconnect the electrical connection between the vehicle and the battery when the vehicle is docked, thereby reducing the risk of high voltage caused by continuous power supply.

[0012] In some embodiments, the method further includes: sending second status information of the battery, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends.

[0013] By sending the second status information of the battery, the battery management system can determine the second control information according to the actual status of the battery, and control the battery status more flexibly and accurately, which is conducive to quickly reducing the risks brought by the battery in an abnormal state and improving the reliability of the battery in powering the vehicle.

[0014] In some embodiments, the first control information is further used to instruct the battery to be in a disconnected state during a third time period and to be closed at the end of the third time period, and the end time of the third time period is the same as the start time of the first time period.

[0015] Considering the risk of high voltage generation when a battery experiences an abnormality in the closed state, the method provided in the embodiments of the present application can reduce the possibility of high voltage generation in abnormal batteries by immediately controlling the abnormal battery to be disconnected. Furthermore, resetting the battery to the closed state after the third time period can promptly provide power to the vehicle, reducing the risk of accidents caused by vehicle power loss and facilitating battery temperature regulation by thermal management components.

[0016] In some embodiments, the start time of the first time period is the same as the time when the battery management system receives the first control information.

[0017] This allows the battery status to be controlled in a timely manner when an abnormality occurs, reducing the possibility of the battery being forced to lose power under abnormal conditions, thereby reducing the possibility of accidents caused by sudden loss of vehicle power.

[0018] In some embodiments, the receiving the first control information includes: receiving the first control information when the battery is in a closed state.

[0019] The battery management system can control the battery in a closed state, reducing the possibility of accidents caused by batteries in an abnormal state.

[0020] In some embodiments, the method further includes: when the battery is in a disconnected state, sending a wake-up message, wherein the wake-up message is used to instruct the battery system controller to switch from a non-operating state to an operating state.

[0021] When the vehicle is parked, the battery management system wakes up the battery system controller to promptly control any abnormalities that occur or are about to occur in the battery, thereby reducing the adverse effects of the abnormal battery state on the vehicle and the possibility of accidents caused by the abnormal battery state.

[0022] In some embodiments, sending the first status information includes: sending the first status information when the battery system controller is in an operating state.

[0023] In this way, the battery can be controlled together with the battery system controller when the battery system controller is in working state, and the power consumption of the battery system controller can be reduced when the battery system controller is not needed.

[0024] In some embodiments, the method further includes: acquiring battery parameters of the battery; and determining the first state information according to the battery parameters.

[0025] Battery parameters can often directly reflect the battery status. The battery management system can obtain the battery status more quickly and directly based on the battery parameters, which is conducive to improving the speed and accuracy of obtaining the battery status.

[0026] In some embodiments, the battery parameter includes at least one parameter of the battery's voltage, current, gas pressure, temperature, and gas concentration.

[0027] These parameters can more intuitively reflect whether the battery is in an abnormal state. Using these parameters is helpful to improve the accuracy of the battery management system in determining the battery status.

[0028] In a second aspect, a method for controlling a battery is provided, which is applied to a battery system controller, including: obtaining first status information, where the first status information is used to indicate that the battery is in a first abnormal state; determining first control information based on the first status information, where the first control information is used to instruct the battery management system to control the battery to be in a closed state within a first time period.

[0029] In an embodiment of the present application, the battery system controller can instruct the battery management system to supply power to the vehicle within a certain period of time after a battery failure occurs, so that the vehicle can have sufficient power to dock, reducing the possibility of the vehicle losing power due to a sudden loss of power in the battery, thereby causing an accident. At the same time, the continuous supply of power from the battery to the vehicle is conducive to the thermal management component to continuously cool the battery, inhibit the heat diffusion inside the battery, reduce the possibility of further damage to the battery, and can reduce the battery power to facilitate subsequent repair or replacement of the battery. The continuous supply of power from the battery to the vehicle can also extend the vehicle's sound and light alarm time, providing assistance to the user. The embodiment of the present application can improve the reliability of the battery as a whole, reduce the risk of serious accidents, and thus improve the user experience.

[0030] In some embodiments, the method further includes: sending second control information, wherein the second control information is used to instruct the battery management system to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period, and the start time of the second time period is the same as the end time of the first time period.

[0031] The battery is in a disconnected state during the second time period, which can promptly disconnect the electrical connection between the vehicle and the battery when the vehicle is docked, thereby reducing the risk of high voltage caused by continuous power supply.

[0032] In some embodiments, sending the second control information includes: acquiring second status information of the battery, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends; and sending the second control information according to the second status information.

[0033] By obtaining the second state information of the battery, the battery system controller can determine the second control information according to the actual state of the battery, making the control of the battery more flexible and accurate, which is conducive to quickly reducing the risks brought by the battery in an abnormal state and improving the reliability of the battery in powering the vehicle.

[0034] In some embodiments, the first control information is further used to instruct the battery to be in a disconnected state during a third time period and to be closed at the end of the third time period, and the end time of the third time period is the same as the start time of the first time period.

[0035] Considering the risk of high voltage generation when a battery experiences an abnormality in the closed state, the method provided in the embodiments of the present application can reduce the possibility of high voltage generation in abnormal batteries by immediately controlling the abnormal battery to be disconnected. Furthermore, resetting the battery to the closed state after the third time period can promptly provide power to the vehicle, reducing the risk of accidents caused by vehicle power loss and facilitating battery temperature regulation by thermal management components.

[0036] In some embodiments, the start time of the first time period is the same as the time when the battery management system receives the first control information.

[0037] This allows the battery status to be controlled in a timely manner when an abnormality occurs, reducing the possibility of the battery being forced to lose power under abnormal conditions, thereby reducing the possibility of accidents caused by sudden loss of vehicle power.

[0038] In some embodiments, the method further includes: sending the first control information when the battery system controller is in an operating state.

[0039] This reduces the power consumption of the battery system controller when the vehicle is not in use.

[0040] In some embodiments, the method further includes: receiving wake-up information, where the wake-up information is used to instruct the battery system controller to switch from a non-operating state to an operating state.

[0041] When the vehicle is parked, the battery management system wakes up the battery system controller to promptly control any abnormalities that occur or are about to occur in the battery, thereby reducing the adverse effects of the abnormal battery state on the vehicle and the possibility of accidents caused by the abnormal battery state.

[0042] In some embodiments, the acquiring the first status information includes: receiving the first status information when the battery system controller is in an operating state.

[0043] In this way, when the vehicle is not needed, that is, when the battery system controller is not needed, the battery can be disconnected from the power supply to the battery system controller, thereby reducing the power consumption of the battery system controller.

[0044] In a third aspect, a device for controlling a battery is provided, comprising: a processing module, wherein the processing module is used to execute the method provided in any embodiment of the first aspect, or the method provided in any embodiment of the second aspect.

[0045] In a fourth aspect, a device for controlling a battery is provided, comprising: a processor and a memory, wherein the memory stores instructions, and when the instructions are executed by the processor, the device executes the method provided in any embodiment of the first aspect above, or executes the method provided in any embodiment of the second aspect above.

[0046] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program. When the computer program is run, the method provided in any embodiment of the first aspect is executed, or the method provided in any embodiment of the second aspect is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0048] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application.

[0049] FIG2 is a method for controlling a battery provided in an embodiment of the present application.

[0050] FIG3 is another method for controlling a battery provided in an embodiment of the present application.

[0051] FIG4 is another method for controlling a battery provided in an embodiment of the present application.

[0052] FIG5 is another method for controlling a battery provided in an embodiment of the present application.

[0053] FIG6 is another method for controlling a battery provided in an embodiment of the present application.

[0054] FIG7 is a device for controlling a battery provided in an embodiment of the present application.

[0055] FIG8 is another device for controlling a battery provided in an embodiment of the present application.

[0056] FIG9 is another device for controlling a battery provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0058] In the description of the present application, it should be noted that, unless otherwise specified, the first, second and various numerical numbers are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. "At least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and c can represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0061] In the embodiments of the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, lithium metal batteries, or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of the present application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0062] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0063] While the battery is providing power to the vehicle, it may experience thermal runaway, causing a rapid increase in internal battery temperature and compromising vehicle safety. However, immediately disconnecting the battery's power supply circuit after thermal runaway occurs would cause the vehicle to lose power, still compromising driving safety.

[0064] In view of this, the present application provides a method for controlling a battery. According to the actual usage status of the battery, in the event of a battery failure, the closed state and the disconnected state of the battery can be reasonably controlled, which can provide power to the vehicle to reduce the possibility of accidents caused by sudden power failure of the battery. At the same time, the battery power can be reduced to reduce the risk of accidents, thereby improving the reliability of the battery in providing power to the vehicle and improving the user experience.

[0065] The technical solutions described in the embodiments of the present application are applicable to various battery-powered electrical devices. Electrical devices may be vehicles, energy storage devices, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. The vehicle may be a two-wheeled vehicle, a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. The energy storage device may be an energy storage uninterruptible power supply (UPS); the spacecraft includes 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 power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application include but are not limited to the above-mentioned electrical devices.

[0066] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0067] As shown in Figure 1, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 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 motor 90, a controller 80 and a battery 10 can be provided inside the vehicle 1. The controller 80 is used to control the battery 10 to supply power to the motor 90. For example, a battery 10 can be provided at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1. For example, the battery 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery 10 can not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0068] In an embodiment of the present application, the battery 10 may include a battery management system (BMS), and the controller 80 may include a battery system controller. The battery management system may be used to collect battery parameters, and the battery system controller may generate a control strategy so that the battery system controller can control the battery to be in a closed state or a disconnected state. Information exchange may be performed between the battery management system and the battery system controller to achieve control of the battery. In a vehicle, the battery system controller may be specifically a vehicle controller area network (CAN), or alternatively, a vehicle control unit (VCU) on the vehicle that communicates with the battery management system; in some energy storage devices, the battery system controller may be specifically a control system for the energy storage device, i.e., an energy management system (EMS).

[0069] Figure 2 shows a method 200 for controlling a battery, which is applied to a battery management system. Specifically, the method 200 may include at least the following steps.

[0070] 210. Send first status information, where the first status information is used to indicate that the battery is in a first abnormal state.

[0071] 220. Receive first control information, where the first control information is determined by first state information, and the first control information is used to instruct the BMS to control the battery to be in a closed state within a first time period.

[0072] When the battery is in a normal state and provides power to the vehicle, the various battery parameters of the battery are within the preset parameter range. In the event that the battery fails or is about to fail, for example, when thermal runaway, leakage, or some other conditions that cause the battery to fail occur inside the battery, at least one battery parameter in the battery may exceed the preset parameter range, then the battery can be considered to be in a first abnormal state, and the first state information is information indicating that the battery is in the first abnormal state. The first state information can be used to trigger the battery system controller to formulate a control strategy for the battery in the first abnormal state to reduce the impact of the battery in the first abnormal state on the vehicle. Specifically, the first state information can be generated when the battery is in the first abnormal state, requesting further control of the battery to the battery system controller to reduce the possibility of an accident.

[0073] In some embodiments, the BMS sends first status information to the battery system controller, and the battery system controller determines a control strategy for the battery based on the first status information, namely, determines first control information. The BMS receives the first control information from the battery system controller. Specifically, the first control information is used to instruct the BMS to control the battery to be in a closed state within a first time period. Optionally, the BMS can further control the battery to be in a closed state within the first time period.

[0074] In some embodiments, the first status information may include information that the battery is in a first abnormal state, and the battery system controller only needs to obtain the first status information to determine the first control information.

[0075] In some embodiments, the first status information may include specific information used to determine that the battery is in the first abnormal state, such as the relationship between battery parameters and corresponding preset ranges. The battery system controller may determine the specific control strategy in the first control information based on the first status information, such as the length of the first time period, the adjustment of battery parameters, etc.

[0076] The first time period may refer to a period of time immediately after the BMS receives the first control information, or may refer to any period of time after the BMS receives the first control information. The battery system controller may flexibly set the start time of the first time period based on the first status information. The length of the first time period may also be flexibly set based on actual needs. For example, the first time period may be 5 to 10 minutes.

[0077] A battery in a closed state refers to a state in which the battery can still conduct the circuit and power the vehicle even in the event of a fault. In some embodiments, the BMS can achieve the closed and open states of the battery by controlling the closing or opening of the battery switch, respectively. Alternatively, the BMS can also achieve control of the closed and open states of the battery by changing the battery current or voltage.

[0078] In some embodiments, after determining the control strategy for the battery, the battery system controller may directly control the battery so that the battery is in a closed state during the first time period.

[0079] In embodiments of the present application, the battery state can be categorized as either a closed state or a disconnected state, depending on whether the battery is providing power to the vehicle. A closed state refers to a state in which the circuit between the battery and the vehicle is connected and the battery is capable of providing power to the vehicle through the circuit. A disconnected state refers to a state in which the circuit between the battery and the vehicle is disconnected and the battery is not providing power to the vehicle. When the battery is providing power to the vehicle, the battery state can be categorized as either a normal state or an abnormal state, depending on the battery's operating conditions. A normal state refers to a state in which a first parameter value of the battery parameter is within a first preset range. An abnormal state refers to a state in which the first parameter value of the battery parameter is outside the first preset range. In some embodiments, abnormal battery states can include a first abnormal state and a second abnormal state. The first abnormal state refers to an abnormal state that occurs before the battery is controlled. Upon receiving the first abnormal state, the battery system controller sends first control information to the battery management system (BMS) to place the battery in a closed state for a first period of time. The second abnormal state refers to a state in which the battery remains abnormal after the first period of time. Upon receiving the second abnormal state, the battery system controller sends second control information to the BMS to place the battery in a disconnected state for a second period of time.

[0080] In an embodiment of the present application, the BMS can receive instructions from the battery system controller when the battery is in an abnormal state, and control the battery to be in a closed state within a certain period of time after the battery fails, to supply power to the vehicle, so that the vehicle has sufficient power to dock, reducing the possibility of the vehicle losing power due to sudden power failure of the battery, thereby causing an accident. At the same time, the BMS controls the battery to continuously supply power to the vehicle, which is beneficial for the thermal management component to continuously cool the battery, inhibit the heat diffusion inside the battery, reduce the possibility of further damage to the battery, and can reduce the battery power to facilitate subsequent repair or replacement of the battery. The battery's continuous power supply to the vehicle can also extend the vehicle's sound and light alarm time, providing assistance to the user. The embodiment of the present application can improve the reliability of the battery as a whole, reduce the risk of serious accidents, and thus improve the user experience.

[0081] According to some embodiments of the present application, FIG3 shows a method 300 for controlling a battery, wherein a battery system controller receives first status information sent by a BMS and determines a control strategy for the battery based on the first status information. Specifically, the method 300 may include at least the following steps.

[0082] 301. The BMS obtains battery parameters of the battery and determines first status information according to the battery parameters.

[0083] Battery parameters can often directly reflect the battery status. BMS can obtain the battery status more quickly and directly based on the battery parameters, which is conducive to improving the speed and accuracy of obtaining the battery status.

[0084] If the first parameter value of the battery parameter is within the first preset range, it can be said that the battery is in a normal state and can normally provide power to the vehicle. For another example, if the first parameter value of the battery parameter is outside the first preset range, it can be said that the battery is in a first abnormal state.

[0085] In some embodiments, the battery parameters may include at least one of the battery's voltage, current, air pressure, temperature, and gas concentration. Specifically, if the parameter value of any of the above parameters exceeds the corresponding preset range, the battery can be considered to be in a first abnormal state. For example, if the voltage and current are not within the corresponding preset range, it may indicate that a short circuit may have occurred or is about to occur inside the battery, or that there may be other circuit faults; if the air pressure and gas concentration are not within the corresponding preset range, it may indicate that a leakage may have occurred inside the battery, or that the external environment may be in a situation that affects the normal operation of the battery; if the temperature is not within the corresponding preset range, it may indicate that thermal runaway may have occurred or is about to occur inside the battery. The above battery parameters are only used as examples to illustrate the specific method of determining the first state information based on the battery parameters. The battery parameters in the embodiments of the present application are not limited to the above.

[0086] 302. The BMS sends first status information to the battery system controller.

[0087] When the BMS detects that the battery is in the first abnormal state, it sends first status information to the battery system controller. The first status information may carry a field indicating that the battery is in the first abnormal state. When the battery system controller receives the first status information, it can obtain information that the battery is in the first abnormal state.

[0088] In some embodiments, the battery system controller receives the first status information while in an operating state. If the battery system controller is in a non-operating state, such as a standby state or a shutdown state, the battery system controller needs to be awakened, i.e., switched to an operating state, so that the battery system controller can receive the first status information and determine a battery control strategy based on the first status information. This allows the battery system controller to be disconnected from power supply to the battery system controller when the vehicle is not in use, i.e., when the battery system controller is not in use, thereby reducing power consumption by the battery system controller.

[0089] 303. The battery system controller determines first control information according to the first status information.

[0090] Step 303 is the same as step 220 in method 200 and will not be described again here.

[0091] 304. The battery system controller sends first control information to the BMS.

[0092] The first control information includes a control strategy for the battery. Specifically, the first control information may be used to instruct the BMS to control the battery to be in a closed state within a first time period.

[0093] In some embodiments, when the battery system controller is in an operating state, the battery system controller sends first control information to the BMS. If the battery system controller is in a non-operating state, such as a standby state or a shutdown state, the battery system controller needs to be switched to an operating state before it can send the first control information to the BMS to instruct the BMS to control the battery. This can reduce power consumption by the battery system controller when the vehicle is not in use.

[0094] 305. The BMS controls the battery to be in a closed state within a first time period.

[0095] The first control information may carry a corresponding indication field. When the BMS receives the first control information, it can control the battery to be in a closed state according to the first time period indicated in the first control information.

[0096] In some embodiments, the start time of the first time period is the same as the time when the BMS receives the first control information. Specifically, after receiving the first control information, the BMS immediately controls the battery to enter the first time period in a closed state to continuously provide power to the vehicle. In some embodiments, the first control information may include a field indicating the duration of the first time period. Upon receiving the first control information, the BMS controls the battery to remain in a closed state for the duration of the first time period. This allows for timely control of the battery status in the event of a battery anomaly, reducing the possibility of the battery being forced to power off in the first abnormal state, thereby reducing the possibility of accidents caused by sudden loss of vehicle power.

[0097] In method 300, the battery is in a closed state during the first time period to provide power to the vehicle, allowing the vehicle to have sufficient power to travel to a suitable location for parking when the battery is in the first abnormal state, thereby reducing the possibility of an accident caused by a sudden loss of power. Simultaneously, the battery in the closed state provides electrical energy to the thermal management component, enabling the thermal management component to cool the battery, reducing the possibility of thermal runaway and slowing the spread of thermal runaway. Furthermore, the battery being in the closed state during the first time period allows the battery to discharge, thereby reducing the risk of an accident caused by the battery.

[0098] According to some embodiments of the present application, FIG4 illustrates another method 400 for controlling a battery. In method 400, the battery is in a closed state during a first time period, is disconnected at the end of the first time period, and is again in the closed state after a second time period. Specifically, method 400 may include at least the following steps.

[0099] 401. The BMS obtains battery parameters and determines first status information according to the battery parameters, where the first status information is used to indicate that the battery is in a first abnormal state.

[0100] 402. The BMS sends first status information to the battery system controller.

[0101] 403. The battery system controller determines first control information according to the first state information, where the first control information is used to instruct the BMS to control the battery to be in a closed state within a first time period.

[0102] 404. The battery system controller sends first control information to the BMS.

[0103] 405. The BMS controls the battery to be in a closed state within a first time period.

[0104] Steps 401 to 405 are the same as steps 301 to 305 in method 300 and are not described again here.

[0105] Optionally, the method 400 may include: 406 , the BMS sends second status information to the battery system controller, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends.

[0106] The second abnormal state refers to the operating state of the battery after the first time period. When the battery is in the second abnormal state, the battery still has a high risk of an accident, and further control of the battery is required to reduce this risk. In the embodiment of the present application, the second abnormal state can represent information that triggers the battery system controller to determine further control strategies for the battery. Other battery states that can trigger the battery system controller to determine further control strategies can also be equivalent to the second abnormal state.

[0107] In some embodiments, whether the battery is in the second abnormal state can be determined by comparing a battery parameter with a corresponding preset range. For example, if a second parameter value of the battery parameter exceeds the second preset range, the battery can be considered to be in the second abnormal state. The battery parameter may include at least one of the battery voltage, current, air pressure, temperature, and gas concentration. The second parameter value is the value of the battery parameter after the first time period.

[0108] When the battery is in the second abnormal state, the BMS sends second status information to the battery system controller. The second status information may carry a field indicating that the battery is in the second abnormal state. Upon receiving the second status information, the battery system controller may obtain information that the battery is in the second abnormal state.

[0109] By obtaining the second state information of the battery, the battery system controller can determine the second control information according to the actual state of the battery, making the control of the battery more flexible and accurate, which is conducive to quickly reducing the risks brought by the battery in an abnormal state and improving the reliability of the battery in powering the vehicle.

[0110] 407. The battery system controller sends second control information to the BMS. The second control information is used to instruct the BMS to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period. The start time of the second time period is the same as the end time of the first time period.

[0111] The second time period refers to the period immediately following the first time period. Specifically, the battery is in a closed state during the first time period, disconnected at the end of the first time period, disconnected during the second time period, and closed again at the end of the second time period. The start time of the second time period and the end time of the first time period may be the same moment.

[0112] A battery disconnected state means the battery is not providing power to the vehicle. In some embodiments, a disconnected battery may indicate that the vehicle's high-voltage control system is not operating, while the vehicle's low-voltage control system may still be operating. The vehicle's high-voltage control system typically uses battery power to control components such as thermal management components and motors, while the vehicle's low-voltage control system typically uses battery power to power components such as the BMS and alarms.

[0113] The battery system controller may send the second control information to the BMS upon receiving a trigger signal, where the trigger signal may be used to indicate a battery status or a vehicle status.

[0114] In some embodiments, the battery system controller may determine second control information based on the second status information. Specifically, upon receiving the second status information, the battery system controller may send the second control information to the BMS. The second control information is used to control the battery after the first time period has elapsed. The battery system controller may set the specific length of the second time period as needed. For example, the second time period may be 5 to 10 minutes.

[0115] In other embodiments, the second control information may also be determined by the vehicle's driving state. Specifically, the battery provides power to the vehicle during a first time period, allowing the vehicle sufficient time to reach a suitable location for parking. Once the vehicle pulls over and stops, the first time period may end. Upon receiving a signal indicating the vehicle is parked, the battery system controller may transmit second control information, instructing the BMS to disconnect the battery during the second time period.

[0116] 408. The BMS controls the battery to be in a disconnected state during a second time period.

[0117] The second control information may carry a corresponding indication field. When the BMS receives the second control information, it can control the battery to be in a disconnected state according to the second time period indicated in the second control information.

[0118] In some embodiments, the battery system controller can directly determine a discharge strategy for the battery in the first abnormal state based on the first status information. For example, upon receiving the first status information, the battery system controller can send first preset control information to the BMS, instructing the BMS to control the battery to be in a closed state for a first time period, in a disconnected state for a second time period, and to be in a closed state again at the end of the second time period. In this case, the first and second time periods can be preset values, each representing the duration of the respective time periods. For example, the first time period can be in the range of 5 to 10 minutes, and the second time period can also be in the range of 5 to 10 minutes. Optionally, the first preset control information can include a duration field for the first time period and a duration field for the second time period. Upon receiving the first preset control information, the BMS can, in accordance with the duration fields in the first preset control information, sequentially control the battery to be in a closed state for the duration of the first time period and to be disconnected for the duration of the second time period, starting from receipt of the first preset control information.

[0119] Optionally, the first preset control information may also include cyclic control of the battery state, that is, after the second time period ends, the BMS may continue to control the battery to be in a closed state and continue for the first time period, and cyclically execute the control strategies of the second time period and the first time period until the battery is exhausted or a signal to stop the cycle is received, then the cycle is stopped.

[0120] In method 400, the battery is in a closed state during a first time period, enabling it to power the vehicle. This allows the vehicle to have sufficient power to travel to a suitable location for parking when the battery is in the first abnormal state, reducing the possibility of an accident caused by a sudden loss of power. Discharging the battery reduces the battery charge, thereby reducing the risk of battery-induced accidents. The battery is in a disconnected state during a second time period, enabling it to promptly disconnect the electrical connection between the vehicle and the battery once the vehicle has docked, reducing the risk of high voltage caused by continued power. Method 400 achieves both of these benefits, improving the reliability of the battery in providing power to the vehicle.

[0121] When the closed and disconnected states of the battery are cyclically controlled, on the one hand, the battery can be discharged in the closed state to reduce the battery power, and the thermal management components can be controlled to cool the battery, thereby reducing the possibility of more serious accidents occurring in the battery; on the other hand, the battery in the disconnected state can reduce the high-voltage risk of the battery, thereby reducing the risk caused by continuous discharge of the battery.

[0122] According to some embodiments of the present application, FIG5 illustrates another method 500 for controlling a battery. In method 500, when a battery is in a first abnormal state, the BMS may control the battery to be in different states during a third time period and a first time period, respectively. Specifically, the battery may be in a disconnected state during the third time period, in a closed state at the end of the third time period, and in the closed state for the first time period. Specifically, method 500 may include at least the following steps.

[0123] 501. The BMS obtains battery parameters and determines first status information according to the battery parameters, where the first status information is used to indicate that the battery is in a first abnormal state.

[0124] 502. The BMS sends first status information to the battery system controller.

[0125] Steps 501 to 502 are the same as steps 301 to 302 in method 300 and are not described again here.

[0126] 503. The battery system controller determines first control information based on the first status information, where the first control information is used to indicate that the battery is in a disconnected state during a third time period, is closed at the end of the third time period, and is in a closed state during the first time period, where the end time of the third time period is the same as the start time of the first time period.

[0127] In step 503, the first time period indicated in the first control information begins some time after the BMS receives the first control information. Specifically, upon receiving the first control information, the BMS immediately controls the battery to be disconnected and enter the third time period. At the end of the third time period, the BMS controls the battery to be closed and enter the first time period. That is, the first time period begins at the end time of the third time period. The end time of the third time period and the start time of the first time period may be the same time.

[0128] In some embodiments, the third time period may be a time period immediately after the BMS receives the first control information. Alternatively, the third time period may be a time period some time after the BMS receives the first control information.

[0129] 504. The battery system controller sends first control information to the BMS.

[0130] 505. The BMS controls the battery switch to be in an open state during a third time period and to be closed at the end of the third time period. The battery switch is in a closed state during the first time period, and the end time of the third time period is the same as the start time of the first time period.

[0131] The first control information may carry a corresponding indication field. For example, it may carry a first field and a second field. The first field is used to indicate that the battery is in a disconnected state during a third time period, and the second field is used to indicate that the battery is in a closed state during a first time period. The first field may include the duration of the third time period, and the second field may include the duration of the first time period. At the same time, the first control information may instruct the BMS to execute the instruction of the first field first, and then execute the instruction of the second field. Upon receiving the first control information, the BMS can control the disconnected state and closed state of the battery according to the third time period and the first time period indicated in the first control information.

[0132] Specifically, upon receiving the first control information, the BMS may immediately control the battery to be in a disconnected state, and control the battery to remain in the disconnected state for a third time period, and control the battery to be in a closed state at the end of the third time period, and control the battery to remain in the closed state for the first time period.

[0133] Optionally, method 500 may further include the following steps.

[0134] 506. The BMS sends second status information to the battery system controller, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends.

[0135] 507. The battery system controller sends second control information to the BMS. The second control information is used to instruct the BMS to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period. The start time of the second time period is the same as the end time of the first time period.

[0136] 508. The BMS controls the battery to be in a disconnected state during a second time period.

[0137] Steps 506 to 508 are the same as steps 406 to 408 in method 400 and are not described again here.

[0138] Considering the risk of high voltage generation when a battery experiences an abnormality in the closed state, method 500 reduces the likelihood of this high voltage generation by immediately disconnecting the abnormal battery. Furthermore, reconnecting the battery after the third time period can promptly provide power to the vehicle, reducing the risk of accidents caused by power loss and facilitating battery temperature regulation by the thermal management component.

[0139] In addition, the closed and open cycle control of the battery can further cool the battery and discharge it, reducing the possibility of accidents caused by abnormal battery conditions.

[0140] According to some embodiments of the present application, FIG6 illustrates another method 600 for controlling a battery. In method 600, a vehicle is parked, and the battery system controller needs to be awakened by the BMS. The battery system controller then determines a battery control strategy based on first status information sent by the BMS. Specifically, method 600 may include at least the following steps.

[0141] 601. Obtain battery parameters, and determine the battery status according to the battery parameters.

[0142] When the vehicle is parked, the battery usually does not supply power to the vehicle's high-voltage control system, and the battery system controller is in a non-operating state, for example, in standby or shutdown. The battery can still supply power to the vehicle's low-voltage control system, so the BMS can still obtain battery parameters and determine whether the battery is in the first abnormal state based on the battery parameters.

[0143] 602. The BMS sends a wake-up message to the battery system controller, where the wake-up message is used to instruct the battery system controller to switch from a non-operating state to an operating state.

[0144] When the BMS determines that the battery is in the first abnormal state, the BMS issues an alarm through an alarm component and sends a wake-up message to the battery system controller. The wake-up message is used to switch the battery system controller from a non-operating state to an operating state, for example, from a standby state to an operating state, so that the battery system controller can instruct the BMS to control the battery status. In some embodiments, the wake-up message can be sent while the battery system controller is in the non-operating state.

[0145] 603. The BMS sends first status information to the battery system controller.

[0146] 604. The battery system controller determines first control information according to the first status information.

[0147] 605. The battery system controller sends first control information to the BMS.

[0148] 606. The BMS controls the battery to be in a closed state during the first time period.

[0149] Steps 603 to 606 may be the same as steps 302 to 305 in method 300, or may be the same as steps 502 to 505 in method 500, and are not described in detail here. Optionally, method 600 may further include the step of cyclically controlling the closed and open states of the battery. The specific steps may be the same as steps 406 to 408 in method 400, or may be the same as steps 506 to 508 in method 500, and are not described in detail here.

[0150] When the vehicle is parked, the BMS in method 600 wakes up the battery system controller to promptly control any abnormalities that occur or are about to occur in the battery, thereby reducing the adverse effects of the abnormal battery state on the vehicle and the possibility of accidents caused by the battery in the abnormal state.

[0151] The embodiment of the present application further provides a device 700 for controlling a battery, as shown in FIG7 , including a processing module 701 for executing the steps in the above-mentioned methods 200 to 600 that are executed by the battery system controller.

[0152] An embodiment of the present application further provides an apparatus 800 for controlling a battery, as shown in FIG8 , including a processing module 801 for executing the steps in the above-mentioned methods 200 to 600 that are executed by the BMS.

[0153] An embodiment of the present application also provides a device 900 for controlling a battery, as shown in FIG9 , including a processor 901 and a memory 902 , wherein the memory 902 stores instructions, which, when executed by the processor 901 , enable the device 900 to execute any one of the above-mentioned methods 200 to 600 .

[0154] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed, any one of the above methods 200 to 600 is executed.

[0155] An embodiment of the present application provides a method for controlling a battery. Specifically, during driving, a battery management system (BMS) obtains battery parameters and determines whether the battery is in a first abnormal state based on the battery parameters. When the battery is in the first abnormal state, the BMS sends first status information to a battery system controller, indicating that the battery is in the first abnormal state. The battery system controller sends first control information to the BMS based on the first status information. Upon receiving the first control information, the BMS controls the battery to be in a closed state.

[0156] When the vehicle is driving at high speed, this can reduce the risk of accidents caused by sudden loss of vehicle power, and reduce the battery power by discharging, thereby reducing the risks brought by abnormal batteries.

[0157] An embodiment of the present application also provides a method for controlling a battery. Specifically, during driving, the BMS obtains battery parameters and determines whether the battery is in a first abnormal state based on the battery parameters. When the battery is in the first abnormal state, the BMS sends first status information to the battery system controller to indicate that the battery is in the first abnormal state. The battery system controller sends first control information to the BMS based on the first status information. Upon receiving the first control information, the BMS controls the battery to be in a closed state within a first time period. At the end of the first time period, the battery system controller sends second control information to the BMS. Upon receiving the second control information, the BMS controls the battery to be in a disconnected state within a second time period and in a closed state at the end of the second time period. The battery is cyclically controlled with the battery being in a closed state for the first time period and in a disconnected state for the second time period as a cycle until the battery temperature is lower than a certain preset value or the battery charge is lower than a certain preset value.

[0158] Under high-speed driving conditions, this can reduce the risk of accidents caused by sudden loss of vehicle power. At the same time, after the vehicle can be safely pulled over, the battery can be disconnected in time to reduce the risk of high voltage caused by continuous power supply.

[0159] An embodiment of the present application also provides a method for controlling a battery. Specifically, during driving, the BMS obtains battery parameters and determines whether the battery is in a first abnormal state based on the battery parameters. When the battery is in the first abnormal state, the BMS sends first status information to the battery system controller to indicate that the battery is in the first abnormal state. The battery system controller sends first control information to the BMS based on the first status information. Upon receiving the first control information, the BMS controls the battery to be in a disconnected state during a third time period, to be in a closed state at the end of the third time period, and to remain in the closed state for the first time period.

[0160] To reduce the risk of high voltage caused by an abnormal battery remaining in the closed state, the battery is controlled to be disconnected during the third time period and closed at the end of the third time period. This reduces the risk of high voltage caused by the abnormal battery and also reduces losses caused by prolonged vehicle power loss.

[0161] The embodiment of the present application also provides a method for controlling a battery. Specifically, in the parking state, the battery does not supply power to the vehicle, and the BMS still maintains monitoring of some basic parameters of the battery. When it is detected that the battery is in a first abnormal state, the BMS sends a wake-up message to the battery system controller to switch the battery system controller from a non-working state to a working state. When the battery system controller is in a working state, the BMS sends a first state information to indicate that the battery is in a first abnormal state. The battery system controller sends a corresponding control strategy to the BMS based on the first state information to improve the reliability of the battery supplying power to the vehicle.

[0162] When the vehicle is parked, the method can promptly detect battery abnormalities and take timely measures to reduce the possibility of accidents.

[0163] The above description is merely a specific 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 the present 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. A method for controlling a battery, characterized in that: Applications in battery management systems, including: Sending first status information, where the first status information is used to indicate that the battery is in a first abnormal state; First control information is received, where the first control information is determined by the first state information, and the first control information is used to instruct the battery management system to control the battery to be in a closed state within a first time period.

2. The method according to claim 1, characterized in that The method further comprises: Receive second control information, where the second control information is used to instruct the battery management system to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period, where the start time of the second time period is the same as the end time of the first time period.

3. The method according to claim 2, characterized in that The method further comprises: Second status information of the battery is sent, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends.

4. The method according to any one of claims 1 to 3, characterized in that The first control information is further used to instruct the battery to be in a disconnected state during a third time period and to be closed at the end of the third time period, where the end time of the third time period is the same as the start time of the first time period.

5. The method according to any one of claims 1 to 3, characterized in that The start time of the first time period is the same as the time when the battery management system receives the first control information.

6. The method according to any one of claims 1 to 3, characterized in that The receiving first control information includes: When the battery is in a closed state, the first control information is received.

7. The method according to any one of claims 1 to 3, characterized in that The method further comprises: When the battery is in a disconnected state, a wake-up message is sent, where the wake-up message is used to instruct the battery system controller to switch from a standby state to an active state.

8. The method according to claim 7, characterized in that The sending of the first status information includes: When the battery system controller is in an operating state, the first state information is sent.

9. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Obtaining battery parameters of the battery; The first status information is determined according to the battery parameter.

10. The method according to claim 9, characterized in that The battery parameters include at least one parameter of the battery's voltage, current, gas pressure, temperature, and gas concentration.

11. A method for controlling a battery, characterized in that: Applied to battery system controllers, including: Acquiring first status information, where the first status information is used to indicate that the battery is in a first abnormal state; First control information is determined according to the first state information, where the first control information is used to instruct a battery management system to control the battery to be in a closed state within a first time period.

12. The method according to claim 11, characterized in that The method further comprises: Sending second control information, where the second control information is used to instruct the battery management system to control the battery to be in a disconnected state during a second time period and to be closed at the end of the second time period, where the start time of the second time period is the same as the end time of the first time period.

13. The method according to claim 12, characterized in that The sending of the second control information includes: acquiring second status information of the battery, where the second status information is used to indicate that the battery is in a second abnormal state after the first time period ends; The second control information is sent according to the second state information.

14. The method according to any one of claims 11 to 13, characterized in that The first control information is further used to instruct the battery to be in a disconnected state during a third time period and to be closed at the end of the third time period, where the end time of the third time period is the same as the start time of the first time period.

15. The method according to any one of claims 11 to 13, characterized in that The start time of the first time period is the same as the time when the battery management system receives the first control information.

16. The method according to any one of claims 11 to 13, characterized in that The method further comprises: When the battery system controller is in an operating state, the first control information is sent.

17. The method according to any one of claims 11 to 13, characterized in that The method further comprises: A wake-up message is received, where the wake-up message is used to instruct the battery system controller to switch from a non-operating state to an operating state.

18. The method according to any one of claims 11 to 13, characterized in that The obtaining of the first status information includes: When the battery system controller is in an operating state, the first state information is received.

19. A device for controlling a battery, characterized in that: include: A processing module, wherein the processing module is configured to execute the method according to any one of claims 1 to 10, or execute the method according to any one of claims 11 to 18.

20. A device for controlling a battery, characterized in that: include: A processor and a memory, wherein the memory stores instructions, and when the instructions are executed by the processor, the device performs the method as described in any one of claims 1 to 10, or performs the method as described in any one of claims 11 to 18.

21. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program. When the computer program is executed, the method according to any one of claims 1 to 10 or the method according to any one of claims 11 to 18 is executed.

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