A battery pack state control method, apparatus, device, and medium

Abstract

A battery pack state control method, device, equipment and medium are disclosed, including: obtaining an electrical parameter of a target device in a vehicle battery pack, determining whether the battery pack has a coolant leakage according to the electrical parameter; if the battery pack has a coolant leakage, determining a target working state of the battery pack according to the electrical parameter and a current working condition of the vehicle, so that the battery pack operates according to the target working state. The present application can monitor whether there is a coolant leakage in the battery pack. After monitoring that the battery pack has a coolant leakage, the working state of the battery pack can be adjusted to the target working state depending on the electrical parameter and the current working condition of the vehicle, thereby improving the safety of the battery pack when the coolant leakage occurs, reducing the probability of a safety accident of the vehicle due to the coolant leakage, and improving the safety of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile battery control, and particularly relates to a battery pack state control method, device, equipment and medium. BACKGROUND

[0002] New energy vehicles usually use power batteries as power sources. The power batteries can only perform well when they are in a stable and suitable working temperature, and therefore, heat exchange equipment (for example, a water cooling plate) is usually provided for the power batteries to ensure the heat dissipation performance of the power batteries.

[0003] However, the water cooling plate may leak, and the leaked cooling liquid makes the power batteries in an unsafe working environment, which causes a safety hazard of the vehicle. Therefore, how to improve the safety of the vehicle when the cooling liquid leaks is a problem to be solved at present. SUMMARY

[0004] Embodiments of the present application provide a battery pack state control method, device, equipment and medium, which solve the technical problem of low safety of a vehicle when cooling liquid leaks in a battery pack in the prior art, and achieve the technical effect of adjusting the working state of the battery pack when the cooling liquid leaks in the battery pack to improve the safety of the vehicle.

[0005] In a first aspect, the present application provides a battery pack state control method, which comprises:

[0006] obtaining an electrical parameter of a target device in a battery pack of a vehicle, and determining whether the battery pack leaks cooling liquid according to the electrical parameter;

[0007] if the battery pack leaks cooling liquid, determining a target working state of the battery pack according to the electrical parameter and a current working condition of the vehicle, so that the battery pack operates according to the target working state.

[0008] Further, determining the target working state of the battery pack according to the electrical parameter and the current working condition of the vehicle comprises:

[0009] determining a leakage degree of the cooling liquid in the battery pack according to a change characteristic of the electrical parameter;

[0010] determining the target working state of the battery pack according to the leakage degree and the current working condition of the vehicle.

[0011] Further, determining the leakage degree of the cooling liquid in the battery pack according to the change characteristic of the electrical parameter comprises:

[0012] determining the leakage degree of the cooling liquid in the battery pack according to the electrical parameter and a preset parameter threshold; and / or,

[0013] determining the leakage degree of the cooling liquid in the battery pack according to a change amplitude of the electrical parameter within a preset time.

[0014] Further, the target working state of the battery pack is determined according to the leakage degree and the current working condition of the vehicle, including:

[0015] If the driving speed corresponding to the current working condition of the vehicle exceeds a preset speed threshold, a first output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power for the vehicle according to the first output power is taken as the target working state, the first output power being greater than 0 and less than the current output power of the vehicle.

[0016] Further, the target working state of the battery pack is determined according to the leakage degree and the current working condition of the vehicle, including:

[0017] If the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold, and the leakage degree exceeds a preset leakage degree, the battery pack is controlled to be powered off, and a state in which the battery pack is powered off is taken as the target working state.

[0018] If the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold, and the leakage degree does not exceed the preset leakage degree, a second output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power for the vehicle according to the second output power is taken as the target working state, the second output power being less than the current output power of the vehicle.

[0019] Further, the target working state of the battery pack is determined according to the leakage degree and the current working condition of the vehicle, further including:

[0020] A power adjustment coefficient is determined according to the leakage degree and the current working condition of the vehicle.

[0021] A third output power of the battery pack is determined according to the power adjustment coefficient, and a state in which the battery pack provides power for the vehicle according to the third output power is taken as the target working state.

[0022] Further, whether the battery pack leaks cooling liquid is determined according to the electrical parameter, including:

[0023] Whether the battery pack leaks cooling liquid is determined according to the electrical parameter and a warning parameter threshold; and / or,

[0024] Whether the battery pack leaks cooling liquid is determined according to a variation amplitude of the electrical parameter within a preset time.

[0025] In a second aspect, the application provides a battery pack state control device, the device comprising:

[0026] A leakage monitoring module is configured to acquire an electrical parameter of a target device in a battery pack of a vehicle, and determine whether the battery pack leaks cooling liquid according to the electrical parameter.

[0027] The determining module is configured to determine a target working state of the battery pack according to the electrical parameter and the current working condition of the vehicle when the battery pack has a coolant leakage, so that the battery pack operates in the target working state.

[0028] Further, the determining module comprises:

[0029] The leakage degree determining submodule is configured to determine a leakage degree of the coolant in the battery pack according to a variation feature of the electrical parameter.

[0030] The working state determining submodule is configured to determine the target working state of the battery pack according to the leakage degree and the current working condition of the vehicle.

[0031] Further, the leakage degree determining submodule is configured to:

[0032] determine the leakage degree of the coolant in the battery pack according to the electrical parameter and a preset parameter threshold; and / or,

[0033] determine the leakage degree of the coolant in the battery pack according to a variation amplitude of the electrical parameter within a preset time.

[0034] Further, the working state determining submodule is configured to:

[0035] when a driving speed corresponding to the current working condition of the vehicle exceeds a preset speed threshold, determine a first output power of the battery pack according to the leakage degree, and take a state in which the battery pack provides power for the vehicle at the first output power as the target working state, the first output power being greater than 0 and less than a current output power of the vehicle.

[0036] Further, the working state determining submodule is further configured to:

[0037] when the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold and the leakage degree exceeds a preset leakage degree, control the battery pack to be powered off urgently, and take a state in which the battery pack is powered off as the target working state.

[0038] when the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold and the leakage degree does not exceed the preset leakage degree, determine a second output power of the battery pack according to the leakage degree, and take a state in which the battery pack provides power for the vehicle at the second output power as the target working state, the second output power being less than the current output power of the vehicle.

[0039] Further, the working state determining submodule is further configured to:

[0040] determine a power adjustment coefficient according to the leakage degree and the current working condition of the vehicle.

[0041] According to the power adjustment coefficient, a third output power of the battery pack is determined, and a state in which the battery pack provides power for the vehicle according to the third output power is taken as a target working state.

[0042] Further, a leakage monitoring module is configured to:

[0043] According to the electrical parameter and the early warning parameter threshold, it is determined whether the battery pack has a coolant leakage; and / or,

[0044] According to the variation amplitude of the electrical parameter within a preset time, it is determined whether the battery pack has a coolant leakage.

[0045] In a third aspect, the present application provides an electronic device, comprising

[0046] a processor;

[0047] a memory for storing processor-executable instructions;

[0048] The processor is configured to execute to implement the battery pack state control method provided in the first aspect.

[0049] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute the battery pack state control method provided in the first aspect.

[0050] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0051] In the embodiments of the present application, according to the electrical parameter of the target device in the vehicle battery pack, it is determined whether the battery pack has a coolant leakage; if the battery pack has a coolant leakage, according to the electrical parameter and the current working condition of the vehicle, a target working state of the battery pack is determined, so that the battery pack operates according to the target working state. On the one hand, the embodiments of the present application can monitor whether there is a coolant leakage in the battery pack, on the other hand, after monitoring that the battery pack has a coolant leakage, the embodiments of the present application can adjust the working state of the battery pack to the target working state depending on the electrical parameter and the current working condition of the vehicle, thereby improving the safety of the battery pack when the coolant leakage occurs, reducing the probability of safety accidents of the vehicle due to the coolant leakage, and improving the safety of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0053] Figure 1 A flowchart of a battery pack state control method provided in the present application is shown in the figure;

[0054] Figure 2 A simplified circuit diagram of a liquid level detection sensor provided in the present application is shown in the figure;

[0055] Figure 3 A structural diagram of a battery pack state control device provided in the present application is shown in the figure;

[0056] Figure 4 A structural diagram of an electronic device provided in the present application is shown in the figure. DETAILED DESCRIPTION

[0057] The embodiments of the present application provide a battery pack state control method, which solves the technical problem of low safety of a vehicle when cooling liquid leakage occurs in a battery pack of the vehicle in the prior art.

[0058] The technical solution of the embodiments of the present application to solve the above technical problem is as follows:

[0059] A battery pack state control method, the method comprising: obtaining an electrical parameter of a target device in a battery pack of a vehicle, determining whether cooling liquid leakage occurs in the battery pack according to the electrical parameter, and determining a target working state of the battery pack according to the electrical parameter and a current working condition of the vehicle if the cooling liquid leakage occurs in the battery pack, so that the battery pack operates according to the target working state.

[0060] The embodiments of the present application determine whether cooling liquid leakage occurs in a battery pack of a vehicle according to an electrical parameter of a target device in the battery pack. If the cooling liquid leakage occurs in the battery pack, a target working state of the battery pack is determined according to the electrical parameter and a current working condition of the vehicle, so that the battery pack operates according to the target working state. On the one hand, the embodiments of the present application can monitor whether cooling liquid leakage exists in the battery pack, and on the other hand, the embodiments of the present application can adjust the working state of the battery pack to the target working state depending on the electrical parameter and the current working condition of the vehicle after monitoring that the cooling liquid leakage occurs in the battery pack, thereby improving the safety of the battery pack when the cooling liquid leakage occurs, reducing the probability of a safety accident of the vehicle due to the cooling liquid leakage, and improving the safety of the vehicle.

[0061] In order to better understand the above technical solution, the above technical solution will be described in detail in combination with the drawings of the specification and specific embodiments.

[0062] First of all, the term "and / or" appearing in this paper is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0063] The present application provides a battery pack state control method as shown in Figure 1 The method provided by the embodiment can be executed by the vehicle-mounted controller.

[0064] In step S11, the electrical parameters of the target device in the vehicle battery pack are obtained, and it is determined whether the battery pack has a coolant leakage according to the electrical parameters.

[0065] In step S12, if the battery pack has a coolant leakage, the target working state of the battery pack is determined according to the electrical parameters and the current working condition of the vehicle, so that the battery pack operates according to the target working state.

[0066] In step S11, the electrical parameters of the target device in the vehicle battery pack are obtained, and it is determined whether the battery pack has a coolant leakage according to the electrical parameters.

[0067] The target device can be a device provided in the battery pack, such as a voltage sensor, a current sensor, etc. for detecting the battery parameters of the battery pack. The target device can also be a device arranged in the battery pack, such as an electric power sensor, a resistance sensor, a liquid level detection sensor, etc.

[0068] The electrical parameters of the target device can be voltage, current, resistance, electric power, etc., which can be selected according to the type of the selected target device or actual needs.

[0069] For example, when the target device is a liquid level detection sensor as shown in Figure 2 The voltage, current or resistance on the liquid level detection sensor can be used as the electrical parameter for determining whether the battery pack has a coolant leakage. It should be noted that Figure 2 The circuit diagram of the liquid level detection sensor shown in Figure 2 The electrical parameters are calculated based on the circuit structure shown in

[0070] In actual operation, the electrical parameters can be obtained at a predetermined frequency, for example, once every 10 seconds; or the electrical parameters can be obtained only when a corresponding trigger signal is detected, for example, when a change in battery power is detected, the operation of obtaining the electrical parameters is performed.

[0071] After obtaining the electrical parameters, it can be determined whether the battery pack has experienced coolant leakage based on the electrical parameters, specifically through either of the following two methods.

[0072] Method 1

[0073] Based on electrical parameters and warning parameter thresholds, determine whether the battery pack has experienced coolant leakage.

[0074] For example, with Figure 2 Taking the liquid level detection sensor shown as an example, VR is a sliding resistor, and R1 and R2 are fixed resistors. The resistance value of the liquid level detection sensor is used as an electrical parameter. The liquid level detection sensor is installed inside the battery pack and outside the water-cooling plate.

[0075] When coolant leaks from the water-cooled plate, the leaking coolant changes the resistance value of the level sensor, allowing the system to determine if a leak has occurred. When the coolant level is below resistor R1, the sensor's resistance value is recorded as the normal value; when the coolant level is above resistor R1 and below resistor R2, the sensor's resistance value is recorded as the warning value; when the coolant level is above resistor R1 and below resistor R2, the sensor's resistance value is recorded as the low-risk value; and when the coolant level is above resistor R2, the sensor's resistance value is recorded as the high-risk value.

[0076] Assuming that the resistance of the circuit in the liquid level detection sensor provided in this embodiment increases as the liquid level rises, then the normal resistance value, warning resistance value, low-risk resistance value, and high-risk resistance value mentioned above will increase sequentially. The warning parameter threshold involved in this embodiment can be determined based on the warning resistance value. When the electrical parameter is lower than the warning resistance value, it means that there is no coolant leakage in the battery pack; when the electrical parameter is higher than the warning resistance value, it means that there is coolant leakage in the battery pack.

[0077] Method Two

[0078] Based on the variation range of electrical parameters within a preset time, determine whether the battery pack has experienced coolant leakage.

[0079] For example, if the change in electrical parameters exceeds a first preset threshold within a preset time, it is considered that the battery pack has experienced coolant leakage; otherwise, it is considered that the battery pack has not experienced coolant leakage.

[0080] If it is determined that there is no coolant leakage in the battery pack according to Method 1 or Method 2 above, then proceed to step S11; if it is determined that there is coolant leakage in the battery pack, then proceed to step S12.

[0081] As to step S12, if the battery pack has a coolant leakage, a target working state of the battery pack is determined according to the electrical parameter and the current working condition of the vehicle, so that the battery pack operates according to the target working state.

[0082] The determining of the target working state of the battery pack according to the electrical parameter and the current working condition of the vehicle can include step S121 and step S122.

[0083] In step S121, the leakage degree of the coolant in the battery pack is determined according to the variation feature of the electrical parameter.

[0084] In step S122, the target working state of the battery pack is determined according to the leakage degree and the current working condition of the vehicle.

[0085] In step S121, the leakage degree of the coolant can be determined according to the variation feature of the electrical parameter. The leakage degree of the coolant can be set according to actual conditions, such as a first leakage, a second leakage, or a low-risk leakage, a medium-risk leakage, a high-risk leakage, etc.

[0086]

Method One

[0087] The leakage degree of the coolant in the battery pack is determined according to the electrical parameter and the preset parameter threshold.

[0088] For example, still taking the liquid level detection sensor shown in FIG. 1 as an example, the preset parameter threshold can include the low-risk resistance value and the high-risk resistance value in the foregoing content. Figure 2 When the electrical parameter is less than the low-risk resistance value, it is considered that the current leakage degree is a low-risk leakage; when the electrical parameter is greater than or equal to the low-risk resistance value and less than the high-risk resistance value, it is considered that the current leakage degree is a medium-risk leakage; and when the electrical parameter is greater than or equal to the high-risk resistance value, it is considered that the current leakage degree is a high-risk leakage.

[0089]

Method Two

[0090] The leakage degree of the coolant in the battery pack is determined according to the variation amplitude of the electrical parameter within a preset time.

[0091] For example, when the variation amplitude of the electrical parameter within the preset time is greater than a first preset threshold and less than a second preset threshold, it is considered that the current leakage degree is a low-risk leakage; when the variation amplitude of the electrical parameter within the preset time is greater than or equal to the second preset threshold and less than a third preset threshold, it is considered that the current leakage degree is a medium-risk leakage; and when the variation amplitude of the electrical parameter within the preset time is greater than or equal to the third preset threshold, it is considered that the current leakage degree is a high-risk leakage.

[0092]

[0093] ​After determining the leakage degree of the coolant, step S122 can be executed. Step S122 can be implemented in any of the following two ways. The first way includes steps S1221-S1224, and the second way includes steps S1225-S1226.

[0094] The first way

[0095] In step S1221, it is determined whether the driving speed corresponding to the current working condition of the vehicle exceeds a preset speed threshold.

[0096] In step S1222, if the driving speed corresponding to the current working condition of the vehicle exceeds the preset speed threshold, a first output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power to the vehicle at the first output power is taken as the target working state. The first output power is greater than 0 and less than the current output power of the vehicle.

[0097] In step S1223, if the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold, and the leakage degree does not exceed a preset leakage degree, a second output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power to the vehicle at the second output power is taken as the target working state. The second output power is less than the current output power of the vehicle.

[0098] In step S1224, if the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold, and the leakage degree exceeds the preset leakage degree, the battery pack is controlled to be powered off, and a state in which the battery pack is powered off is taken as the target working state.

[0099] When the current driving speed of the vehicle exceeds the preset speed threshold, it is considered that the vehicle is in high-speed driving. If coolant leakage occurs during high-speed driving of the vehicle, the first output power determined at this time needs to be greater than 0 and less than the current output power of the vehicle. On the one hand, this reduces the output power of the battery pack, reduces the load of the battery pack, reduces the probability of insulation failure of the battery pack in a short time, improves driving safety, and on the other hand, the output power of the battery pack is not 0. This can avoid the situation that the battery pack is directly powered off, that is, avoid the situation that the vehicle loses power during high-speed driving, and improve the safety of the vehicle in the case of high-speed driving and coolant leakage.

[0100] When the current driving speed of the vehicle exceeds the preset speed threshold, the first output power needs to be determined according to the leakage degree of the coolant. The more serious the leakage degree, the lower the corresponding first output power should be, and vice versa, so as to improve the safety in the case of coolant leakage during high-speed driving.

[0101] For example, when the leakage degree of the coolant is less than 10%, the first output power of the battery pack is 50% of the current output power of the vehicle; when the leakage degree of the coolant is greater than 10% and less than 20%, the first output power of the battery pack is 40% of the current output power of the vehicle; when the leakage degree of the coolant is greater than 20% and less than 30%, the first output power of the battery pack is 30% of the current output power of the vehicle; and when the leakage degree of the coolant is greater than 30%, the first output power of the battery pack is 20% of the current output power of the vehicle. Figure 2Taking the liquid level detection sensor shown as an example, when the leakage level is low-risk leakage, medium-risk leakage, and high-risk leakage, the corresponding first output power is P1, P2, and P3 respectively, with P1, P2, and P3 decreasing in sequence.

[0102] When the vehicle's current speed does not exceed a preset speed threshold, the vehicle is considered to be traveling at low speed, or the vehicle speed is 0, indicating it is in a charging or parking state. If the vehicle's current speed does not exceed the preset speed threshold, the second output power of the battery pack is further determined based on the degree of leakage.

[0103] When the driving speed does not exceed the preset speed threshold and the leakage level does not exceed the preset leakage level, the output power of the battery pack is limited, that is, a second output power with a lower output power than the current output power is selected for operation. On the one hand, this can ensure the normal driving of the vehicle, so that the driver and passengers can move the vehicle to a safe area or repair point, improving the convenience of the driver and passengers on the road; on the other hand, it can also improve driving safety when coolant leaks.

[0104] When the driving speed does not exceed the preset speed threshold, but the leakage level exceeds the preset leakage level, the battery pack is controlled to cut off power in an emergency to prevent the vehicle from continuing to move, making it easier for the occupants to escape and improving their safety.

[0105] [Second method]

[0106] Step S1225: Determine the power adjustment coefficient based on the degree of leakage and the current operating condition of the vehicle;

[0107] Step S1226: Determine the third output power of the battery pack according to the power adjustment coefficient, and take the state in which the battery pack provides power to the vehicle according to the third output power as the target working state.

[0108] In practice, the correlation between leakage level, vehicle speed, and power adjustment coefficient can be preset and stored in the relevant equipment of the vehicle. Then, based on the current leakage level of the battery pack and the vehicle speed corresponding to the current operating condition, the corresponding power adjustment coefficient can be determined from the above correlation. The correlation can be a table, curve, or other form, and this embodiment does not limit it.

[0109] Based on the determined power adjustment coefficient and the rated output power of the battery pack, the third output power of the battery pack can be determined, so that the battery pack provides power output to the vehicle according to the third output power. The specific implementation can be referred to the following formula.

[0110] P limited =P*φ

[0111] Among them, P limitedP is the rated output power of the vehicle, and φ is the power adjustment coefficient.

[0112] For example, as shown in Table 1, an example of the correlation between the leakage degree, the vehicle speed, and the power adjustment coefficient. When the vehicle speed exceeds the preset speed threshold, the power adjustment coefficients corresponding to the low-risk leakage, the medium-risk leakage, and the high-risk leakage are set to 1, 0.8, and 0.2, respectively; when the vehicle speed does not exceed the preset speed threshold, the power adjustment coefficients corresponding to the low-risk leakage, the medium-risk leakage, and the high-risk leakage are set to 1, 0.7, and 0, respectively.

[0113] Table 1

[0114] Low risk leak Medium risk leak High risk leak Vehicle speed exceeds a pre-set speed threshold 1 0.8 0.2 Vehicle speed does not exceed a pre-set speed threshold 1 0.7 0

[0115] In addition, the third output power can also be determined according to the current output power of the battery pack and the power adjustment coefficient, that is, P in the above formula can also be the current output power. The specific selection can be made according to the actual situation.

[0116] In addition, the controller can generate a prompt signal while performing step S12, or after determining that the battery pack has leaked the coolant. The prompt signal can be used to light the corresponding fault lamp on the vehicle, or can be used to trigger the sound and light alarm device to work or trigger the screen to display related information, so as to remind the driver and passenger that the battery pack has leaked the coolant. On the one hand, it can alert the driver and passenger to pay attention to driving safety, and on the other hand, it can enable the driver and passenger to know the fact that the coolant has leaked in the first time, so as to enable the driver and passenger to reasonably arrange time for maintenance as soon as possible.

[0117] In summary, the embodiments of the present application determine whether the battery pack has leaked the coolant according to the electrical parameters of the target device in the battery pack of the vehicle. If the battery pack has leaked the coolant, the target working state of the battery pack is determined according to the electrical parameters and the current working condition of the vehicle, so that the battery pack operates according to the target working state. On the one hand, the embodiments of the present application can monitor whether there is a coolant leakage in the battery pack, and on the other hand, the embodiments of the present application can adjust the working state of the battery pack to the target working state by relying on the electrical parameters and the current working condition of the vehicle after monitoring that the battery pack has leaked the coolant, thereby improving the safety of the battery pack when the coolant leakage occurs, reducing the probability of safety accidents of the vehicle due to the coolant leakage, and improving the safety of the vehicle.

[0118] More specifically, after determining that the battery pack has a coolant leakage, the degree of the coolant leakage can also be determined, and the working state of the battery pack is adjusted in combination with the current working condition of the vehicle and the degree of the coolant leakage. For example, when the vehicle is in high-speed driving, on one hand, the output power of the battery pack is reduced according to the degree of the coolant leakage, to ensure the continuous driving of the vehicle, reduce the probability of insulation failure of the battery pack in a short time, and on the other hand, the output power of the battery pack is prevented from being 0, that is, the battery pack is prevented from being in emergency power-off state, to prevent the vehicle from suddenly losing power when driving at high speed, and improve the driving safety. When the vehicle is in low-speed driving, parking or the like, it is determined according to the degree of the coolant leakage whether the battery pack needs to be in emergency power-off state, on one hand, in the case that the degree of the coolant leakage is not high, the output power of the battery pack is limited to ensure the continuous driving of the vehicle, that is, to ensure the driving convenience, and on the other hand, in the case that the degree of the coolant leakage is high, the battery pack can be controlled to be in emergency power-off state, to facilitate the driver and passengers to escape from the vehicle, and to give priority to the safety of the driver and passengers.

[0119] Based on the same inventive concept, the embodiments of the present application provide a battery pack state control device as shown in Figure 3 The device comprises:

[0120] The leakage monitoring module 31 is configured to acquire an electrical parameter of a target device in a battery pack of a vehicle, and determine whether the battery pack has a coolant leakage according to the electrical parameter.

[0121] The determination module 32 is configured to, when the battery pack has a coolant leakage, determine a target working state of the battery pack according to the electrical parameter and a current working condition of the vehicle, so that the battery pack operates in the target working state.

[0122] Further, the determination module 32 comprises:

[0123] The leakage degree determination submodule is configured to determine the degree of the coolant leakage in the battery pack according to a variation feature of the electrical parameter.

[0124] The working state determination submodule is configured to determine the target working state of the battery pack according to the degree of the coolant leakage and the current working condition of the vehicle.

[0125] Further, the leakage degree determination submodule is configured to:

[0126] determine the degree of the coolant leakage in the battery pack according to the electrical parameter and a preset parameter threshold; and / or,

[0127] determine the degree of the coolant leakage in the battery pack according to a variation amplitude of the electrical parameter within a preset time.

[0128] Further, the working state determination submodule is configured to:

[0129] When the driving speed corresponding to the current working condition of the vehicle exceeds a preset speed threshold, a first output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power for the vehicle at the first output power is taken as the target working condition, the first output power being greater than 0 and less than the current output power of the vehicle.

[0130] Further, the working condition determination sub-module is further configured to:

[0131] When the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold and the leakage degree exceeds a preset leakage degree, the battery pack is controlled to be powered off, and a state in which the battery pack is powered off is taken as the target working condition;

[0132] When the driving speed corresponding to the current working condition of the vehicle does not exceed the preset speed threshold and the leakage degree does not exceed the preset leakage degree, a second output power of the battery pack is determined according to the leakage degree, and a state in which the battery pack provides power for the vehicle at the second output power is taken as the target working condition, the second output power being less than the current output power of the vehicle.

[0133] Further, the working condition determination sub-module is further configured to:

[0134] The power adjustment coefficient is determined according to the leakage degree and the current working condition of the vehicle;

[0135] The third output power of the battery pack is determined according to the power adjustment coefficient, and a state in which the battery pack provides power for the vehicle at the third output power is taken as the target working condition.

[0136] Further, the leakage monitoring module 31 is configured to:

[0137] determine whether the battery pack leaks cooling liquid according to the electrical parameter and the early warning parameter threshold; and / or,

[0138] determine whether the battery pack leaks cooling liquid according to a variation amplitude of the electrical parameter within a preset time.

[0139] Based on the same inventive concept, the application also provides an electronic device as shown in Figure 4 The electronic device comprises:

[0140] a processor 41;

[0141] a memory 42 for storing executable instructions of the processor 41;

[0142] The processor 41 is configured to execute to implement the battery pack state control method as described above.

[0143] Based on the same inventive concept, the embodiment of the present application provides a non-transitory computer readable storage medium, when instructions in the storage medium are executed by the processor 41 of the electronic device, the electronic device can execute the battery pack state control method.

[0144] Since the electronic device introduced in the embodiment is the electronic device used for implementing the information processing method in the embodiment of the present application, based on the information processing method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation of the electronic device in the embodiment and its various forms, so the electronic device how to implement the method in the embodiment of the present application will not be introduced in detail here. As long as the electronic device used for implementing the information processing method in the embodiment of the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0145] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer usable storage media containing computer usable program code (including but not limited to disk storage, CD-ROM, optical storage, etc.).

[0146] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The means for performing the functions specified in one or more flows and / or blocks.

[0147] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction means, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The means for performing the functions specified in one or more flows and / or blocks.

[0148] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 one or more flowcharts and / or blocks

[0149] Although preferred embodiments of the application have been described herein, substitutions and modifications of these preferred embodiments made by those skilled in the art are to be considered within the scope of the application. Therefore, it is intended that the appended claims be construed to include all such substitutions and modifications as fall within the true spirit and scope of the application.

[0150] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A battery pack state control method, characterized in that, The method includes: Obtain the electrical parameters of the target device in the vehicle battery pack, and determine whether the battery pack has experienced coolant leakage based on the electrical parameters; If the battery pack experiences coolant leakage, the degree of leakage is determined based on the characteristics of the changes in the electrical parameters; based on the degree of leakage and the current operating condition of the vehicle, a target operating state for the battery pack is determined, so that the battery pack operates according to the target operating state. The determination of the target operating state of the battery pack based on the degree of leakage and the current operating condition of the vehicle includes: If the current operating condition of the vehicle corresponds to a driving speed exceeding a preset speed threshold, the first output power of the battery pack is determined according to the degree of leakage, and the state in which the battery pack provides power to the vehicle according to the first output power is taken as the target working state, wherein the first output power is greater than 0 and less than the current output power of the vehicle; If the vehicle's current operating speed does not exceed a preset speed threshold, and the leakage level exceeds a preset leakage level, the battery pack is controlled to shut down urgently, and the power-off state of the battery pack is taken as the target operating state. If the vehicle's current operating speed does not exceed the preset speed threshold and the leakage level does not exceed the preset leakage level, the second output power of the battery pack is determined based on the leakage level, and the state in which the battery pack provides power to the vehicle according to the second output power is taken as the target operating state, wherein the second output power is less than the vehicle's current output power.

2. The method as described in claim 1, characterized in that, Determining the degree of coolant leakage in the battery pack based on the variation characteristics of the electrical parameters includes: The degree of coolant leakage in the battery pack is determined based on the electrical parameters and preset parameter thresholds; or, The degree of coolant leakage in the battery pack is determined based on the variation range of the electrical parameters within a preset time period.

3. The method as described in claim 1, characterized in that, Determining the target operating state of the battery pack based on the degree of leakage and the current operating condition of the vehicle includes: Based on the degree of leakage and the current operating condition of the vehicle, determine the power adjustment coefficient; Based on the power adjustment coefficient, the third output power of the battery pack is determined, and the state in which the battery pack provides power to the vehicle according to the third output power is taken as the target operating state.

4. The method as described in claim 1, characterized in that, The step of determining whether the battery pack has experienced coolant leakage based on the electrical parameters includes: Based on the electrical parameters and warning parameter thresholds, determine whether the battery pack has experienced coolant leakage; or, Based on the variation range of the electrical parameters within a preset time, it is determined whether the battery pack has experienced coolant leakage.

5. A battery pack status control device, characterized in that, The device includes: The leakage monitoring module is used to acquire the electrical parameters of the target device in the vehicle battery pack and determine whether the battery pack has experienced coolant leakage based on the electrical parameters. The determination module is used to determine the degree of coolant leakage in the battery pack based on the change characteristics of the electrical parameters if coolant leakage occurs in the battery pack; and to determine the target operating state of the battery pack based on the degree of leakage and the current operating condition of the vehicle, so that the battery pack operates according to the target operating state. The determination of the target operating state of the battery pack based on the degree of leakage and the current operating condition of the vehicle includes: If the current operating condition of the vehicle corresponds to a driving speed exceeding a preset speed threshold, the first output power of the battery pack is determined according to the degree of leakage, and the state in which the battery pack provides power to the vehicle according to the first output power is taken as the target working state, wherein the first output power is greater than 0 and less than the current output power of the vehicle; If the vehicle's current operating speed does not exceed a preset speed threshold, and the leakage level exceeds a preset leakage level, the battery pack is controlled to shut down urgently, and the power-off state of the battery pack is taken as the target operating state. If the vehicle's current operating speed does not exceed the preset speed threshold and the leakage level does not exceed the preset leakage level, the second output power of the battery pack is determined based on the leakage level, and the state in which the battery pack provides power to the vehicle according to the second output power is taken as the target operating state, wherein the second output power is less than the vehicle's current output power.

6. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a battery pack state control method as described in any one of claims 1 to 4.

7. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a battery pack state control method as described in any one of claims 1 to 4.

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