Control method of vehicle battery and electronic device

Abstract

The application discloses a kind of control method of vehicle battery and electronic equipment, belong to intelligent driving technical field.Control method of vehicle battery includes: obtaining the calibration information of battery under different working conditions, the first state information of battery and the second state information of vehicle, calibration information includes power reservation value and the available power of vehicle under non-special working condition;According to the first state information and the second state information, it is determined whether the vehicle is in special working condition;If the vehicle is in special working condition, according to the first state information, the second state information and power reservation value, the additional power of battery under special working condition is determined;According to the first state information, available power and additional power, the working power of battery under special working condition is controlled.Through the above control method, the application embodiment can more reasonably control the working power of battery under special working condition and non-special working condition, to optimize battery performance, prolong the service life of battery, improve the reliability of vehicle operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent driving, in particular to a control method of a vehicle battery and an electronic device. BACKGROUND

[0002] As a core energy storage component of a new energy vehicle, a power battery has extremely strict requirements on boundary power (i.e., the maximum power that the battery can safely input or output under specific working conditions) during use, and needs to avoid overcharging or overdischarging as much as possible to improve the use performance and service life of the power battery.

[0003] In related technologies, the power capability of a power battery is usually calibrated based on the SOC (State of Charge) of the power battery and the battery temperature, and then the use power of the battery is limited by the calibration information obtained after calibration, and a certain power reservation value is set at the boundary power of the calibration information to avoid the situation that the power battery of the vehicle exceeds its safe working range under extreme working conditions.

[0004] However, due to the complexity of the use power and working conditions of the vehicle, the actual power capability of the battery may not completely match the theoretical power capability calibrated by the calibration information, and thus the battery management based on the calibration information of the battery still has the possibility of overcharging or overdischarging under some special working conditions. SUMMARY

[0005] The present application provides a control method of a vehicle battery and an electronic device to solve the technical problems existing in related technologies. Specifically, the following technical solutions are included.

[0006] In a first aspect, the present application provides a control method of a vehicle battery, the control method comprising: obtaining calibration information of the battery under different working conditions, first state information of the battery, and second state information of the vehicle, the calibration information comprising a power reservation value and available power of the vehicle under a non-special working condition, the non-special working condition being used to indicate a working condition in which the battery is not allowed to use the power reservation value; determining whether the vehicle is in a special working condition according to the first state information and the second state information, the special working condition being used to indicate a working condition in which the battery is allowed to use the power reservation value; if the vehicle is in the special working condition, determining an additional power of the battery under the special working condition according to the first state information, the second state information, and the power reservation value, the additional power being used to indicate an allocation amount of the power reservation value used by the battery under the special working condition; and controlling the working power of the battery under the special working condition according to the first state information, the available power, and the additional power.

[0007] In some possible implementation, the determining the bias power of the battery in the special working condition according to the first state information, the second state information and the power reservation value comprises: determining the power reservation value corresponding to the first state information; determining a control coefficient of the battery in the special working condition according to the second state information, the control coefficient being used to indicate an allocation strategy of the power reservation value in the special working condition; and determining the bias power according to the power reservation value and the control coefficient.

[0008] In some possible implementation, the power reservation value comprises an output power reservation value, the first state information comprises temperature information and state of charge information of the battery, and the second state information comprises limit discharge information used to indicate a limit discharge signal, the limit discharge signal indicating that a difference between an output power of the battery and the available power corresponding to the output power is less than a first difference threshold. The determining whether the vehicle is in the special working condition according to the first state information and the second state information of the vehicle comprises: if the limit discharge information indicates the limit discharge signal, and the temperature indicated by the temperature information is lower than a first low temperature threshold and / or the state of charge indicated by the state of charge information is lower than a first state of charge threshold, determining that the vehicle is in a first special working condition, the first special working condition being used to indicate a working condition in which the battery is allowed to use the output power reservation value.

[0009] In some possible implementation, the control coefficient comprises a first control coefficient, the first control coefficient being used to indicate the allocation strategy of the power reservation value in the first special working condition, the limit discharge signal comprises a first signal used to start an engine of the vehicle, and the second state information further comprises a starting number of the engine in the first special working condition, a starting time and a first starting water temperature of the engine. The determining the control coefficient of the battery in the special working condition according to the second state information comprises: determining the first control coefficient according to the starting number, the starting time and the first starting water temperature.

[0010] In some possible implementation, the power reservation value comprises an input power reservation value, the first state information comprises temperature information and state of charge information of the battery, the second state information comprises limit charging information indicating a limit charging signal, the limit charging signal indicates that a difference between an input power of the battery and the corresponding available power is less than a second difference threshold, and the determining whether the vehicle is in the special working condition according to the first state information and the second state information of the vehicle comprises: if the limit charging information indicates the limit charging signal, and the temperature indicated by the temperature information is lower than a second low temperature threshold and / or the state of charge indicated by the state of charge information is higher than a second state of charge threshold, determining that the vehicle is in a second special working condition, the second special working condition being used to indicate a working condition in which the battery is allowed to use the input power reservation value.

[0011] In some possible implementation, the control coefficient comprises a second control coefficient, the second control coefficient being used to indicate an allocation strategy for the power reservation value in the second special working condition, the limit charging signal comprises a second signal indicating that an engine of the vehicle continuously charges the battery, the second state information further comprises an input power of the engine and a charging time of the engine in the second special working condition, and the determining the control coefficient of the battery in the special working condition according to the second state information comprises: determining the second control coefficient according to the input power and the charging time.

[0012] In some possible implementation, the first state information comprises an actual working power of the battery, and the controlling the working power of the battery in the special working condition according to the first state information, the available power and the additional power comprises: correcting the available power according to the actual working power; and determining the working power of the battery in the special working condition according to the corrected available power and the additional power.

[0013] In some possible implementation, the correcting the available power according to the actual working power comprises: correcting the available power by taking an extreme value between the actual working power and the available power.

[0014] In some possible implementation, the correcting the available power by taking an extreme value between the actual working power and the available power comprises: if the battery is in a charging mode, taking a maximum value between the actual working power and the corresponding available power as the corrected available power; or if the battery is in a discharging mode, taking a minimum value between the actual working power and the corresponding available power as the corrected available power.

[0015] In a second aspect, the present application provides a control device for a vehicle battery, comprising: an obtaining module configured to obtain calibration information of the battery under different working conditions, first state information of the battery, and second state information of the vehicle, wherein the calibration information comprises a power reservation value and available power of the vehicle under a non-special working condition, and the non-special working condition is used to indicate a working condition in which the battery is not allowed to use the power reservation value; a first determining module configured to determine whether the vehicle is in a special working condition according to the first state information and the second state information, wherein the special working condition is used to indicate a working condition in which the battery is allowed to use the power reservation value; a second determining module configured to determine an additional power of the battery under the special working condition according to the first state information, the second state information, and the power reservation value if the vehicle is in the special working condition, wherein the additional power is used to indicate an allocated amount of the power reservation value used by the battery under the special working condition; and a control module configured to control working power of the battery under the special working condition according to the first state information, the available power, and the additional power.

[0016] In some possible implementation manners, the second determining module is configured to determine the power reservation value corresponding to the first state information; determine a control coefficient of the battery under the special working condition according to the second state information, wherein the control coefficient is used to indicate an allocation strategy of the power reservation value under the special working condition; and determine the additional power according to the power reservation value and the control coefficient.

[0017] In some possible implementation manners, the power reservation value comprises an output power reservation value, the first state information comprises temperature information and state of charge information of the battery, and the second state information comprises limit discharge information used to indicate a limit discharge signal, wherein the limit discharge signal indicates that a difference between an output power of the battery and corresponding available power is less than a first difference threshold value, and the first determining module is configured to determine that the vehicle is in a first special working condition if the limit discharge information indicates the limit discharge signal, and temperature indicated by the temperature information is lower than a first low temperature threshold value and / or state of charge indicated by the state of charge information is lower than a first state of charge threshold value, wherein the first special working condition is used to indicate a working condition in which the battery is allowed to use the output power reservation value.

[0018] In some possible implementation, the control coefficient includes a first control coefficient, the first control coefficient is used to indicate an allocation strategy of the power reservation value in the first special working condition, the limit discharge signal includes a first signal used to start an engine of the vehicle, the second state information further includes a starting number of the engine in the first special working condition, a starting time and a first starting water temperature of the engine, and the second determining module is configured to determine the first control coefficient according to the starting number, the starting time and the first starting water temperature.

[0019] In some possible implementation, the power reservation value includes an input power reservation value, the first state information includes temperature information and state of charge information of the battery, the second state information includes limit charging information used to indicate a limit charging signal, the limit charging signal indicates that a difference between an input power of the battery and the corresponding available power is less than a second difference threshold, and the first determining module is configured to determine that the vehicle is in a second special working condition if the limit charging information indicates the limit charging signal and the temperature information indicates that the temperature is lower than a second low temperature threshold and / or the state of charge information indicates that the state of charge is higher than a second state of charge threshold, the second special working condition is used to indicate a working condition in which the battery is allowed to use the input power reservation value.

[0020] In some possible implementation, the control coefficient includes a second control coefficient, the second control coefficient is used to indicate an allocation strategy of the power reservation value in the second special working condition, the limit charging signal includes a second signal used to indicate that an engine of the vehicle continuously charges the battery, the second state information further includes an input power of the engine and a charging time of the engine in the second special working condition, and the second determining module is configured to determine the second control coefficient according to the input power and the charging time.

[0021] In some possible implementation, the first state information includes an actual working power of the battery, and the control module is configured to correct the available power according to the actual working power; and determine the working power of the battery in the special working condition according to the corrected available power and the additional power.

[0022] In some possible implementation, the control module is configured to correct the available power by taking an extreme value between the actual working power and the available power.

[0023] In some possible implementation manners, the control module is configured to take the maximum value of the actual working power and the corresponding available power as the corrected available power if the battery is in the charging mode, or take the minimum value of the actual working power and the corresponding available power as the corrected available power if the battery is in the discharging mode.

[0024] In a third aspect, the present application provides an electronic device for controlling a vehicle battery, comprising a memory, at least one program instruction for controlling the vehicle battery being stored on the memory; and a processor, the program instruction being executed by the processor to enable the vehicle to implement the control method in the first aspect or any possible implementation manner of the first aspect.

[0025] In a fourth aspect, the present application provides a computer program (product), comprising computer program / instruction, the computer program / instruction being executed by a processor to enable the vehicle to implement the control method in the first aspect or any possible implementation manner of the first aspect.

[0026] In a fifth aspect, the present application provides a computer-readable storage medium, having stored thereon program instruction for controlling a vehicle battery, the program instruction being executed by one or more processors to enable the vehicle to implement the control method in the first aspect or any possible implementation manner of the first aspect.

[0027] The technical scheme provided by the present application has at least the following beneficial effects:

[0028] The technical scheme provided by the present application has at least the following beneficial effects: On the one hand, the available power of the vehicle under the non-special working condition meets the use demand of the battery power of the vehicle under the non-special working condition, and the power reservation value is set to form a certain buffer space between the available power used by the vehicle under the non-special working condition and the boundary power of the battery, so as to avoid the overcharging or overdischarging phenomenon that may occur when the vehicle suddenly changes from the non-special working condition to the special working condition, and to more reasonably allocate the battery power. On the other hand, the present application further determines whether the current working condition of the vehicle is a special working condition through the first state information of the battery and the second state information of the vehicle, and further adaptively allocates a certain amount of power reservation value for the special working condition according to the first state information and the second state information, so that the demand for the power reservation value of the vehicle under the special working condition can be more accurate. The above control method can not only optimize the use performance of the battery, prolong the service life of the battery, but also greatly improve the reliability of the vehicle operation. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0030] Figure 1 is a schematic diagram of an implementation scenario provided by the embodiments of the present application.

[0031] Figure 2 is a flow chart of a control method of a vehicle battery provided by the embodiments of the present application.

[0032] Figure 3 is a structural schematic diagram of a control device of a vehicle battery provided by the embodiments of the present application.

[0033] Figure 4 is a structural schematic diagram of an electronic device for controlling a vehicle battery provided by the embodiments of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] The exemplary embodiments will be described in detail herein with reference to the drawings. Unless otherwise indicated, the same numbers on the different drawings represent and / or indicate the same or similar elements. The following exemplary embodiments are described with reference to the drawings, and are not meant to represent all the embodiments in accordance with the present application. Rather, they are merely examples in accordance with some aspects of the present application as detailed in the appended claims.

[0036] Figure 1 is a schematic diagram of an implementation scenario provided by the embodiments of the present application. Referring to Figure 1 , the implementation scenario provided by the embodiments of the present application can include a vehicle control unit 11 and a battery management unit 12.

[0037] The battery management unit 12 can be used, but not limited to, collecting information related to the running conditions and running status of the vehicle battery, to monitor the working status of the battery. The vehicle control unit 11 can be connected with the battery management unit 12 in a wired or wireless manner, to distribute and limit the power of the battery according to the information collected by the battery management unit 12 and the information related to the running status of the vehicle.

[0038] Optionally, the vehicle-mounted control unit 11 can be a terminal controller mounted in the vehicle, or can be a server, a server cluster composed of multiple servers, or a cloud computing service center. The battery management unit 12 can be a BMS (battery management system), or any other device or system that can monitor the working condition of the battery.

[0039] Those skilled in the art should understand that the vehicle-mounted control unit 11 and the battery management unit 12 described above are only examples, and other existing or future vehicle-mounted control units and battery management units that can be applicable to the present application should also be included in the protection scope of the present application, and are hereby incorporated by reference.

[0040] Figure 2 is a flowchart of the control method of the vehicle battery provided by the embodiments of the present application, which can be executed by the vehicle-mounted control unit for example, and the present application does not make any limitation in this aspect. Referring to Figure 2 The control method of the vehicle battery provided by the embodiments of the present application can include the following steps.

[0041] In step S210, the calibration information of the battery under different working conditions, the first state information of the battery, and the second state information of the vehicle are obtained. The calibration information includes the power reservation value and the available power of the vehicle under non-special working conditions, and the non-special working conditions are used to indicate the working conditions in which the battery is not allowed to use the power reservation value.

[0042] For example, the calibration information of the battery can include a plurality of calibration information corresponding to different working conditions; similarly, the power reservation value of the battery and the available power of the vehicle under non-special working conditions can also include a plurality of power reservation values and a plurality of available powers of the vehicle under non-special working conditions corresponding to different working conditions.

[0043] For example, the power reservation value of the battery can be determined according to the difference between the boundary power of the battery (i.e., the maximum power that the battery can safely input or output under a specific working condition) and the actual demand power of the vehicle under a specific working condition (e.g., a specific SOC and temperature), and the power reservation value can be equal to or less than the difference between the boundary power of the battery and the actual demand power of the vehicle.

[0044] For example, the boundary power of the battery can be determined by querying the power map of the battery, and the power map of the battery can include a chart drawn according to the maximum power that the battery can safely input or output under different working conditions, or can include a data table reflecting the mapping relationship between the maximum power that the battery can safely input or output under different working conditions and the corresponding working conditions, and the present application does not make any limitation in this aspect.

[0045] The actual demand power of the vehicle may, for example, include a plurality of actual demand powers determined according to the working power of all electrical devices in the vehicle and the driving demand of the vehicle under different driving conditions, or may include the maximum value in the plurality of actual demand powers determined according to the working power of all electrical devices in the vehicle and the driving demand of the vehicle under different driving conditions, and the application does not make any limitation in this regard. The available power of the vehicle under non-special working conditions may be determined according to the reserved power value of the battery and the boundary power of the battery, and may be equal to or less than the difference between the boundary power of the battery and the power reservation value.

[0046] In some embodiments, the manner of obtaining the calibration information of the battery under different working conditions may, for example, include obtaining the calibration information of the battery under different working conditions by accessing the local storage device carried by the vehicle, or may include obtaining the calibration information of the battery under different conditions by exchanging data with the cloud. The method of obtaining the calibration information of the battery under different conditions by exchanging data with the cloud may, for example, include sending a request instruction for calibration information to the cloud through any wireless communication mode such as Bluetooth, WIFI (Wireless Fidelity), cellular network, etc., to request the cloud to send the calibration information.

[0047] Optionally, the first state information of the battery may, for example, include temperature information, state of charge information, state of health information, etc. of the battery, and any information capable of reflecting the working conditions and working conditions of the battery, and the manner of obtaining the first state information may be directly collected by the sensor carried in the vehicle, or may be calculated according to the information collected by the sensor. Similarly, the second state information of the vehicle may, for example, include any information related to the power system (such as the engine), the transmission system, the electronic system, the driving behavior, etc. of the vehicle, which can reflect the running condition of the vehicle, and the manner of obtaining the second state information may be directly collected by the sensor carried in the vehicle, or may be calculated according to the information collected by the sensor.

[0048] As described above, the power reservation value can be equal to or less than the difference between the boundary power of the battery and the actual demand power of the vehicle, and the available power of the vehicle in the non-special working condition can be equal to or less than the difference between the boundary power and the power reservation value. In other words, the available power of the vehicle in the non-special working condition can cover the actual demand power of the vehicle, and after part of the power of the battery is allocated as the available power of the vehicle in the non-special working condition, another part of the power (i.e., the power reservation value) reserved in advance can serve as a buffer space between the available power of the vehicle in the non-special working condition and the boundary power of the battery to avoid overcharging or over-discharging of the battery that can occur in the partial working condition. The overcharging or over-discharging of the battery that can occur in the partial working condition can include, for example, when the charging or discharging capacity of the battery is affected by factors such as temperature, remaining power, etc., and decreases, the maximum output or input power available to the battery also decreases, resulting in that the actual remaining power available to the battery after the power reservation value reserved in advance is set can be less than the available power of the vehicle in the non-special working condition, and the actual remaining power available to the battery cannot cover the actual demand power of the vehicle.

[0049] In view of this, the embodiments of the present application can more reasonably allocate the battery power by setting part of the power reservation value at the boundary power of the battery, so that the battery can meet the actual demand power of the vehicle in the non-special working condition while avoiding overcharging or over-discharging that can occur in the working process of the battery, which is beneficial to improve the use performance and service life of the battery and ensure the stability of the battery working.

[0050] In step S220, it is determined whether the vehicle is in a special working condition according to the first state information and the second state information, and the special working condition is used to indicate a working condition in which the battery is allowed to use the power reservation value.

[0051] As described above, when the charging or discharging capacity of the battery decreases, the actual remaining power available to the battery can not cover the actual demand power of the vehicle. In view of this, the working condition in which the actual remaining power available to the battery can not cover the actual demand power of the vehicle can be determined as the special working condition of the vehicle, and the battery power allocation of the vehicle in the special working condition is controlled separately from the non-special working condition. For example, the power reservation value of the battery reserved in advance can be released to meet the actual power demand of the vehicle in the special working condition, and prevent the vehicle from being unable to maintain the current driving state due to insufficient power available to the battery, so as to ensure the stability of the vehicle running.

[0052] It is also considered that in actual application scenarios, the working conditions and working states of the battery and the running state of the vehicle will all affect the charging or discharging capability of the battery. In view of this, whether the vehicle is in a special working condition allowing the battery to use the power reservation value can be determined according to the first state information of the battery capable of reflecting the working conditions and working states of the battery and the second state information of the vehicle capable of reflecting the running state of the vehicle.

[0053] It is also considered that the factors causing the charging capability of the battery to decrease and the discharging capability of the battery to decrease can be different, and the demand for the power reservation value after the charging capability of the battery decreases is also different from the demand for the power reservation value after the discharging capability of the battery decreases. In view of this, in order to more timely and accurately determine the current charging capability or discharging capability of the battery, thereby improving the control efficiency of the battery of the vehicle in the special working condition, the special working condition corresponding to the decrease of the discharging capability of the battery and the special working condition corresponding to the decrease of the charging capability of the battery can be distinguished.

[0054] In some embodiments, the power reservation value of the battery may, for example, include an output power reservation value, the first state information may, for example, include temperature information and state of charge information (which can be used but is not limited to indicating the remaining capacity of the battery, the same below, and will not be repeated) of the battery, the second state information may, for example, include limit discharge information used to indicate a limit discharge signal, and whether the vehicle is in a special working condition is determined according to the first state information and the second state information of the vehicle, which may, for example, include: if the limit discharge signal indicated by the limit discharge information is detected, and the temperature indicated by the temperature information is lower than a first low temperature threshold and / or the state of charge indicated by the state of charge information is lower than a first charge threshold, it is determined that the vehicle is in a first special working condition.

[0055] The first special working condition is used to indicate a working condition allowing the battery to use an output power reservation value. The difference between the output power of the battery indicated by the limit discharge signal and the available power of the corresponding vehicle in a non-special working condition is less than a first difference threshold. When the limit discharge signal indicated by the limit discharge information is detected, the actual remaining power available for the battery in the first special working condition of the vehicle can not cover the actual demand power of the vehicle. At this time, the discharging power reservation value in the power reservation value previously reserved by the battery can be released to meet the special discharge demand of the vehicle in the first special working condition. The values of the first difference threshold, the first low temperature threshold and the first charge threshold can be adjusted according to actual application situations.

[0056] The first special condition may be, for example, that the limit discharge signal is detected and the temperature indicated by the temperature information is lower than a first low temperature threshold; or that the limit discharge signal is detected and the temperature indicated by the temperature information is lower than the first low temperature threshold and the state of charge indicated by the state of charge information is lower than a first state of charge threshold; or that the limit discharge signal is detected and the state of charge indicated by the state of charge information is lower than the first state of charge threshold.

[0057] The difference between the output power of the battery indicated by the limit discharge signal and the available power of the corresponding vehicle in the non-special condition may be obtained, for example, by determining the first working condition of the battery according to the first state information when the vehicle generates the limit discharge signal, determining the available power of the corresponding vehicle in the non-special condition corresponding to the limit discharge signal according to the first calibration information of the battery in the first working condition, and calculating the difference between the available power of the corresponding vehicle in the non-special condition corresponding to the limit discharge signal and the output power of the battery indicated by the limit discharge signal.

[0058] In some embodiments, the power reservation value of the battery may include, for example, an input power reservation value, the first state information may include, for example, temperature information and state of charge information of the battery, the second state information may include, for example, limit charging information for indicating a limit charging signal, and determining whether the vehicle is in a special condition according to the first state information and the second state information of the vehicle may include, for example, determining that the vehicle is in a second special condition if the limit charging signal indicated by the limit charging information is detected and the temperature indicated by the temperature information is lower than a second low temperature threshold and / or the state of charge indicated by the state of charge information is higher than a second state of charge threshold.

[0059] The second special condition is used to indicate a condition in which the battery is allowed to use the input power reservation value. The difference between the input power of the battery indicated by the limit charging signal and the available power of the corresponding vehicle in the non-special condition is less than a second difference threshold. When the limit charging signal indicated by the limit charging information is detected, the actual remaining power available for the battery in the second special condition of the vehicle may not cover the actual demand power of the vehicle. At this time, the charging power reservation value in the power reservation value previously reserved by the battery can be released to meet the special discharge demand of the vehicle in the second special condition. The second difference threshold may be the same as or different from the first difference threshold; the second low temperature threshold may be the same as or different from the first low temperature threshold; the second state of charge threshold may be the same as or different from the first state of charge threshold; and the specific values of the second difference threshold, the second low temperature threshold and the second state of charge threshold may be adjusted according to actual application requirements, which are not limited in this regard by the present application.

[0060] The second special working condition may be, for example, that the limit charging signal is detected and the temperature indicated by the temperature information is lower than a second low temperature threshold; or may be that the limit charging signal is detected and the state of charge indicated by the state of charge information is higher than a second state of charge threshold; or may be that the limit charging signal is detected and the temperature indicated by the temperature information is lower than the second low temperature threshold and the state of charge indicated by the state of charge information is higher than the second state of charge threshold.

[0061] The difference between the input power of the battery indicated by the limit charging signal and the available power of the corresponding vehicle in the non-special working condition may be obtained by, for example, determining a second working condition of the battery according to the first state information when the vehicle generates the limit charging signal, determining the available power of the vehicle in the non-special working condition corresponding to the limit charging signal according to the second calibration information of the battery in the second working condition, and calculating the difference between the available power of the vehicle in the non-special working condition corresponding to the limit charging signal and the input power of the battery indicated by the limit charging signal.

[0062] In step S230, if the vehicle is in the special working condition, the additional power of the battery in the special working condition is determined according to the first state information, the second state information and the power reservation value, and the additional power is used to indicate the allocation amount of the power reservation value used by the battery in the special working condition.

[0063] As described above, the first state information may reflect the charging or discharging capability of the battery, and the second state information may be used to reflect the actual demand power of the vehicle. When the vehicle is in the special working condition, the decrease amplitude of the charging or discharging capability of the battery may be determined according to the first state information of the battery, the current actual demand power of the vehicle may be determined according to the second state information of the vehicle, and then the difference between the actual remaining power that can be allocated and used by the battery after the decrease of the charging or discharging capability of the battery and the actual demand power of the vehicle is determined. Based on the difference between the actual remaining power that can be allocated and used by the battery and the actual demand power of the vehicle, part or all of the previously reserved power reservation value may be allowed to be allocated and used by the battery to meet the power demand of the vehicle in the special working condition, that is, the additional power of the battery in the special working condition is determined.

[0064] Through the above method, the embodiments of the present application can timely understand the working characteristics of the vehicle and the battery according to the first state information and the second state information, and then adaptively meet the special demand of the vehicle for the battery in the special working condition. At the same time, since the size of the power reservation value limits the upper limit of the additional power, the overcharging or overdischarging of the battery due to the too large additional power when the vehicle determines the additional power in the special working condition is also avoided.

[0065] In different special working conditions, the amount of the power reservation value allocated mainly depends on the actual demand power of the vehicle. In different working conditions, the factors to be considered in determining the actual demand power of the vehicle are also different. For example, when the vehicle is in a cold start condition (i.e., the engine is started in a low temperature environment), the factors affecting the actual demand power of the vehicle are mainly related to the conditions of the engine. In view of this, the allocation strategy of the power reservation value of the vehicle in different special working conditions can be determined according to the second state information which can reflect the working condition of the vehicle. The allocation strategy may, for example, be used to indicate the contribution of the factors affecting the actual demand power of the vehicle to the amount of the power reservation value allocated by the vehicle in the special working condition in different working conditions. In some embodiments, the method for determining the additional power of the battery in the special working condition according to the first state information, the second state information and the power reservation value of the battery may, for example, include: determining the power reservation value corresponding to the first state information; determining a control coefficient of the battery in the special working condition according to the second state information, and determining the additional power according to the power reservation value and the control coefficient. The control coefficient is used to indicate the allocation strategy of the power reservation value of the battery in the special working condition.

[0066] The method for determining the power reservation value corresponding to the first state information may, for example, be to determine the power reservation value corresponding to the first state information as the power reservation value corresponding to the same working condition of the battery indicated by the first state information. The method for determining the additional power according to the power reservation value and the control coefficient may, for example, be to determine the product of the power reservation value and the control coefficient as the additional power of the battery in the special working condition.

[0067] In some embodiments, the first special working condition corresponding to the decline of the discharge capacity of the battery may, for example, be a first special working condition in which the discharge capacity of the battery is reduced due to a low temperature environment and / or a low remaining power, and thus the output power of the battery cannot meet the actual demand power of the vehicle when the engine is started. It is considered that when the battery is in a low temperature environment and / or has a low remaining power, the starting water temperature of the engine will affect the output power of the battery when the engine is started, or as the number of engine start times and the starting time increases, the discharge capacity of the battery may further decrease, resulting in a change in the amount of the power reservation value to be allocated.

[0068] In view of this, when the limit discharge signal is a first signal for starting the engine of the vehicle, the control coefficient may, for example, include a first control coefficient, and the second state information may further include the number of starts, the start time and the initial start water temperature of the engine under the first special working condition. The control coefficient of the battery under the special working condition is determined according to the second state information, for example, may include: determining the first control coefficient according to the number of starts, the start time and the initial start water temperature. The first control coefficient may be used, but not limited to, to indicate the allocation strategy of the power reservation value under the first special working condition. The number of starts, the start time and the first control coefficient are positively correlated, and the start water temperature and the first control coefficient are negatively correlated.

[0069] Through the above method, the embodiments of the present application can more accurately determine the allocation amount of the power reservation value when the battery is in a low temperature environment and / or has a low remaining power, according to the number of starts, the start time and the initial start water temperature of the engine, to improve the possibility of starting the engine once or reduce the number of starts of the engine.

[0070] In some embodiments, the second special working condition corresponding to the decline of the charging capacity of the battery may, for example, be that the low temperature environment and / or the high remaining power causes the decline of the charging capacity of the battery, so that the input power of the battery cannot meet the actual demand power of the vehicle when the engine of the vehicle continuously charges the battery (which may include charging the battery when the vehicle is in an idle or driving state).

[0071] When the battery is in a low temperature environment and / or has a high remaining power, the charging power and the charging time of the engine charging the battery will both affect the power reservation value that needs to be allocated. In view of this, when the limit charging signal is a second signal for indicating that the engine of the vehicle continuously charges the battery, the control coefficient may, for example, include a second control coefficient, and the second state information may further include the input power of the engine and the charging time of the engine under the second special working condition. The control coefficient of the battery under the special working condition is determined according to the second state information, for example, may include: determining the second control coefficient according to the input power and the charging time. The second control coefficient may be used, but not limited to, to indicate the allocation strategy of the power reservation value under the second special working condition. The input power and the second control coefficient are negatively correlated, and the charging time and the second control coefficient are positively correlated.

[0072] Through the above method, the embodiments of the present application can more accurately determine the allocation amount of the power reservation value when the battery is in a low temperature environment and / or has a high remaining power, according to the input power and the charging time of the engine, to improve the charging efficiency of the engine.

[0073] Step S240, controlling the working power of the battery under the special working condition according to the first state information, the available power and the bias power.

[0074] As described above, the available power of the vehicle in the non-special working condition can be equal to the difference between the boundary power of the battery and the power reservation value, and the power reservation value of the battery can be equal to the difference between the boundary power of the battery and the actual demand power of the vehicle. In other words, the available power of the vehicle in the non-special working condition can be used to meet the actual demand power of the vehicle in the non-special working condition. As described above, when the charging or discharging capacity of the battery decreases, the battery cannot meet the actual power demand of the vehicle (i.e., the vehicle is in a special working condition), and the stability of the vehicle can be ensured by releasing the power reservation value. The embodiments of the present application can meet the reasonable use of the boundary power of the battery in the non-special working condition by the available power of the vehicle in the non-special working condition and the additional power in the special working condition, and avoid overcharging or overdischarging (i.e., setting the power reservation value at the boundary power), and can adaptively release the power reservation value in the special working condition to meet the special demand of the special working condition.

[0075] In addition, considering that the available power of the vehicle in the non-special working condition is a calibrated value under specific experimental conditions, there can be a certain deviation from the actual value during the driving of the vehicle. Therefore, the available power of the vehicle in the non-special working condition can be further corrected according to the actual working power of the battery to further improve the rationality of the power control of the battery.

[0076] In some embodiments, the first state information includes the actual working power of the battery, and the control of the working power of the battery in the special working condition according to the first state information, the available power and the additional power can include: correcting the available power according to the actual working power; determining the working power of the battery in the special working condition according to the corrected available power and the additional power. For example, the method of determining the working power of the battery in the special working condition according to the corrected available power and the additional power can be to determine the sum of the corrected available power and the additional power as the working power of the battery in the special working condition.

[0077] In addition, the use time and the health state of the battery can also affect the charging or discharging capacity of the battery. In some embodiments, after determining the working power of the battery in the special working condition according to the corrected available power and the additional power, the method provided by the embodiments of the present application can further include: correcting the working power of the battery in the special working condition according to the use time or the health state of the battery. For example, the method of correcting the working power of the battery in the special working condition according to the use time or the health state of the battery can refer to the following standard: when the use time of the battery increases or the health state decreases, the working power of the battery in the special working condition is amplified by a certain proportion. The amplification ratio of the working power of the battery in the special working condition can be adjusted according to the actual application, and the present application does not make any limitation in this aspect.

[0078] In some other embodiments, the method for correcting the available power based on the actual operating power may be, for example, by taking the extreme value between the actual operating power and the available power. For instance, if the battery is in charging mode, the maximum value between the actual operating power and the corresponding available power is used as the corrected available power. Alternatively, if the battery is in discharging mode, the minimum value between the actual operating power and the corresponding available power is used as the corrected available power. The maximum value between the actual operating power and the corresponding available power may, for example, be the maximum of the two; and the minimum value between the actual operating power and the corresponding available power may, for example, be the minimum of the two.

[0079] The technical solution provided in this application, on the one hand, satisfies the vehicle's battery power requirements under non-special operating conditions by utilizing the vehicle's available power. Furthermore, by setting a power reserve value, a buffer space is created between the available power used by the vehicle under non-special operating conditions and the battery's boundary power, preventing overcharging or over-discharging that may occur when the vehicle suddenly transitions from non-special operating conditions to special operating conditions, thus achieving a more rational allocation of battery power. On the other hand, this application also determines whether the vehicle's current operating condition is a special operating condition based on the battery's first state information and the vehicle's second state information, and further adaptively allocates a certain amount of power reserve value for special operating conditions based on the first and second state information, making the vehicle's power reserve value requirements under special operating conditions more precise. The above control method not only optimizes battery performance and extends battery life but also greatly improves the reliability of vehicle operation.

[0080] In some other possible implementations, this application also provides a control device for a vehicle battery. Figure 3 This is a schematic diagram of the structure of the vehicle battery control device provided in the embodiments of this application. See also... Figure 3 The vehicle battery control device provided in this application embodiment includes the following modules.

[0081] The acquisition module 310 is used to acquire the calibration information of the battery under different operating conditions, the first state information of the battery, and the second state information of the vehicle. The calibration information includes the power reserve value and the available power of the vehicle under non-special operating conditions. The non-special operating conditions are used to indicate the operating conditions under which the battery is not allowed to use the power reserve value.

[0082] The first determining module 320 is used to determine whether the vehicle is in a special operating condition based on the first state information and the second state information. The special operating condition is used to indicate the operating condition that allows the battery to use the reserved power value.

[0083] The second determining module 330 is configured to determine, if the vehicle is in the special working condition, an extra power of the battery in the special working condition according to the first state information, the second state information and the power reservation value, the extra power being used to indicate an allocated amount of the power reservation value used by the battery in the special working condition.

[0084] The control module 340 is configured to control the working power of the battery in the special working condition according to the first state information, the available power and the extra power.

[0085] In some possible implementation manners, the second determining module 330 is configured to determine a power reservation value corresponding to the first state information; determine a control coefficient of the battery in the special working condition according to the second state information, the control coefficient being used to indicate an allocation strategy of the power reservation value in the special working condition; and determine the extra power according to the power reservation value and the control coefficient.

[0086] In some possible implementation manners, the power reservation value includes an output power reservation value, the first state information includes temperature information and state of charge information of the battery, the second state information includes limit discharge information used to indicate a limit discharge signal, the limit discharge signal indicates that a difference between an output power of the battery and a corresponding available power is less than a first difference threshold value, and the first determining module 320 is configured to determine that the vehicle is in a first special working condition if the limit discharge information indicates the limit discharge signal and the temperature information indicates that the temperature is lower than a first low temperature threshold value and / or the state of charge information indicates that the state of charge is lower than a first charge threshold value.

[0087] In some possible implementation manners, the control coefficient includes a first control coefficient, the first control coefficient is used to indicate the allocation strategy of the power reservation value in the first special working condition, the limit discharge signal includes a first signal used to start an engine of the vehicle, the second state information further includes a starting number of the engine in the first special working condition, a starting time and a first starting water temperature of the engine, and the second determining module 330 is configured to determine the first control coefficient according to the starting number, the starting time and the first starting water temperature.

[0088] In some possible implementation manners, the power reservation value includes an input power reservation value, the first state information includes temperature information and state of charge information of the battery, the second state information includes limit charge information used to indicate a limit charge signal, the limit charge signal indicates that a difference between an input power of the battery and a corresponding available power is less than a second difference threshold value, and the first determining module 320 is configured to determine that the vehicle is in a second special working condition if the limit charge information indicates the limit charge signal and the temperature information indicates that the temperature is lower than a second low temperature threshold value and / or the state of charge information indicates that the state of charge is higher than a second charge threshold value, the second special working condition being used to indicate a working condition in which the battery is allowed to use the input power reservation value.

[0089] In some possible implementation manners, the control coefficient includes a second control coefficient, the second control coefficient is used to indicate an allocation strategy of the power reservation value in the second special working condition, the limit charging signal includes a second signal used to indicate that the engine of the vehicle continuously charges the battery, the second state information further includes an input power of the engine and a charging time of the engine in the second special working condition, and the second determining module 330 is configured to determine the second control coefficient according to the input power and the charging time.

[0090] In some possible implementation manners, the first state information includes an actual working power of the battery, the control module 340 is configured to correct the available power according to the actual working power; and determine the working power of the battery in the special working condition according to the corrected available power and the additional power.

[0091] In some possible implementation manners, the control module 340 is configured to correct the available power by taking the extreme value in the actual working power and the available power.

[0092] In some possible implementation manners, the control module 340 is configured to take the maximum value in the actual working power and the corresponding available power as the corrected available power if the battery is in the charging mode, or take the minimum value in the actual working power and the corresponding available power as the corrected available power if the battery is in the discharging mode.

[0093] It should be understood that the control device of the vehicle battery provided by the above embodiments and the control method of the vehicle battery belong to the same concept, and the specific implementation process is described in the control method of the vehicle battery.

[0094] In some possible implementation manners, the control device of the vehicle battery provided by the above embodiments and the control method of the vehicle battery belong to the same concept, and the specific implementation process is described in the control method of the vehicle battery. Figure 4 is a structural schematic diagram of the electronic device for controlling the vehicle battery provided by the embodiments of the present application, referring to Figure 4 The electronic device for controlling the vehicle battery provided by the embodiments of the present application comprises:

[0095] The memory 410 stores at least one program instruction for controlling the vehicle battery.

[0096] The processor 420 executes the above program instruction, so that the vehicle realizes the above-mentioned control method of the vehicle battery. Figure 2The steps of the described control method and its multiple embodiments are described. Depending on the implementation, the processor 420 can be one or more types of processors, including but not limited to a central processing unit (CPU), a graphics processing unit (GPU), or other general purpose and / or special purpose processors, including but not limited to a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, and the like, and the number of processors can be determined according to actual needs.

[0097] In yet some possible implementations, the present application also provides a computer program (product) including computer programs / instructions executed by a processor to enable a vehicle to implement the above-described control method and its multiple embodiments. Figure 2 The steps of the described control method and its multiple embodiments are described.

[0098] In yet some possible implementations, the present application also provides a computer readable storage medium having stored thereon program instructions for controlling a vehicle battery, which, when executed by one or more processors, enable a vehicle to implement the above-described control method and its multiple embodiments. Figure 2 The steps of the described control method and its multiple embodiments are described. The computer readable storage medium can be a readable signal medium or a readable storage medium. The readable storage medium may, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the above. More specific examples (a non-exhaustive list) of the readable storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0099] It should also be noted that the terms "first", "second" and the like, if any, in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of these terms herein is merely for distinguishing between the similar objects and the use of these terms in the description and the claims of the present application is not a representation that the objects so distinguished are consecutive or in any other temporal relation. Embodiments described in the following examples should not be interpreted as a limitation to all embodiments consistent with the present application. Rather, these embodiments are described as examples consistent with some aspects of the present application as detailed in the appended claims.

[0100] The term "and / or", within the scope of the present application, merely describes an association between associated objects, which can exist in three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone.

[0101] The above description is merely intended to facilitate understanding of the technical solutions of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of a vehicle battery, characterized by, The control method comprises: obtaining calibration information of the battery under different working conditions, first state information of the battery and second state information of the vehicle, wherein the calibration information comprises a power reservation value and available power of the vehicle under a non-special working condition, and the non-special working condition is used to indicate a working condition in which the battery is not allowed to use the power reservation value; determining whether the vehicle is in a special working condition according to the first state information and the second state information, wherein the special working condition is used to indicate a working condition in which the battery is allowed to use the power reservation value; if the vehicle is in the special working condition, determining an additional power of the battery under the special working condition according to the first state information, the second state information and the power reservation value, wherein the additional power is used to indicate an allocation amount of the power reservation value used by the battery under the special working condition; controlling working power of the battery under the special working condition according to the first state information, the available power and the additional power.

2. The control method according to claim 1, characterized by, The determination of the additional power of the battery under the special working condition according to the first state information, the second state information and the power reservation value comprises: determining the power reservation value corresponding to the first state information; determining a control coefficient of the battery under the special working condition according to the second state information, wherein the control coefficient is used to indicate an allocation strategy of the power reservation value under the special working condition; determining the additional power according to the power reservation value and the control coefficient.

3. The control method according to claim 2, characterized by, The power reservation value comprises an output power reservation value, the first state information comprises temperature information and state of charge information of the battery, the second state information comprises limit discharge information used to indicate a limit discharge signal, the difference between the output power of the battery indicated by the limit discharge signal and the corresponding available power is less than a first difference threshold, and the determination of whether the vehicle is in a special working condition according to the first state information and the second state information of the vehicle comprises: if the limit discharge information indicates the limit discharge signal, and the temperature indicated by the temperature information is lower than a first low-temperature threshold and / or the state of charge indicated by the state of charge information is lower than a first state of charge threshold, it is determined that the vehicle is in a first special working condition, and the first special working condition is used to indicate a working condition in which the battery is allowed to use the output power reservation value.

4. The control method according to claim 3, characterized by The control coefficient comprises a first control coefficient used to indicate an allocation strategy of the power reservation value under the first special working condition, the limit discharge signal comprises a first signal used to start an engine of the vehicle, the second state information further comprises a starting number of the engine under the first special working condition, a starting time and a first starting water temperature of the engine, and the determination of the control coefficient of the battery under the special working condition according to the second state information comprises: determining the first control coefficient according to the starting number, the starting time and the first starting water temperature.

5. The control method according to claim 2, characterized by, The power reservation value includes an input power reservation value, the first state information includes temperature information and state of charge information of the battery, the second state information includes limit charging information used for indicating a limit charging signal, the limit charging signal indicates that a difference between input power of the battery and the corresponding available power is less than a second difference threshold value, and the determining whether the vehicle is in the special working condition according to the first state information and the second state information of the vehicle includes: If the limit charging information indicates the limit charging signal, and the temperature indicated by the temperature information is lower than a second low temperature threshold value and / or the state of charge indicated by the state of charge information is higher than a second state of charge threshold value, it is determined that the vehicle is in a second special working condition, and the second special working condition is used to indicate a working condition in which the battery is allowed to use the input power reservation value.

6. The control method according to claim 5, characterized by The control coefficient includes a second control coefficient used to indicate an allocation strategy for the power reservation value in the second special working condition, the limit charging signal includes a second signal used to indicate that an engine of the vehicle continuously charges the battery, the second state information further includes input power of the engine and charging time of the engine in the second special working condition, and the determining the control coefficient of the battery in the special working condition according to the second state information includes: Determining the second control coefficient according to the input power and the charging time.

7. The control method according to any one of claims 1 to 6, characterized by, The first state information includes actual working power of the battery, and the controlling working power of the battery in the special working condition according to the first state information, the available power and the additional power includes: Correcting the available power according to the actual working power; Determining working power of the battery in the special working condition according to the corrected available power and the additional power.

8. The control method according to claim 7, characterized by, The correcting the available power according to the actual working power includes: Correcting the available power by taking an extreme value in the actual working power and the available power.

9. The control method according to claim 8, characterized by, The correcting the available power by taking an extreme value in the actual working power and the available power includes: If the battery is in a charging mode, taking a maximum value in the actual working power and the corresponding available power as the corrected available power; or If the battery is in a discharging mode, taking a minimum value in the actual working power and the corresponding available power as the corrected available power.

10. An electronic device, comprising: The control method includes: A memory having program instructions for controlling a battery of a vehicle stored thereon; And A processor, when the program instructions are executed by the processor, causes the vehicle to implement the control method according to any one of claims 1-9.

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