Vehicle battery control method and electronic equipment

Abstract

The invention discloses a vehicle battery control method and electronic equipment, and belongs to the technical field of intelligent driving. The control method of the vehicle battery comprises the steps that calibration information of the battery under different working conditions, first state information of the battery and second state information of a vehicle are obtained, wherein the calibration information comprises a power reserved value and available power of the vehicle under a non-special working condition; determining whether the vehicle is in a special working condition according to the first state information and the second state information; if the vehicle is in the special working condition, the bias power of the battery under the special working condition is determined according to the first state information, the second state information and the power reserved value; and 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. By means of the control method, the working power of the battery under the special working condition and the non-special working condition can be more reasonably controlled, then the using performance of the battery is optimized, the service life of the battery is prolonged, and the running reliability of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of intelligent driving technology, and particularly to a control method for a vehicle battery and an electronic device. Background Art

[0002] As the core energy storage component of new energy vehicles, the power battery has extremely strict requirements for the boundary power (i.e., the maximum power that the battery can safely input or output under specific working conditions) during use, and it is necessary to avoid overcharging or over-discharging as much as possible to improve the performance and service life of the power battery.

[0003] In related technologies, usually, the power capacity of the power battery is calibrated based on the SOC (State of Charge) of the power battery and the battery temperature, and then the calibrated information obtained is used to limit the use power of the battery, and a certain power reserve value is set at the boundary power of the calibrated information to avoid the situation where the power battery of the vehicle exceeds its safe working range under extreme working conditions.

[0004] However, due to the complexity of the vehicle's overall use power and working conditions, the actual power capacity of the battery may not exactly match the theoretical power capacity calibrated by the calibrated information, which may lead to the possibility of overcharging or over-discharging in the battery management based on the calibrated information of the battery under some special working conditions. Summary of the Invention

[0005] This application provides a control method for 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, this application provides a control method for a vehicle battery. The control method includes: obtaining the calibrated information of the battery under different working conditions, the first state information of the battery, and the second state information of the vehicle. The calibrated information includes a power reserve value and the available power of the vehicle under non-special working conditions. The non-special working conditions are used to indicate the working conditions where the battery is not allowed to use the power reserve 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 conditions are used to indicate the working conditions where the battery is allowed to use the power reserve value; if the vehicle is in the special working condition, determining the additional power of the battery under the special working condition according to the first state information, the second state information, and the power reserve value. The additional power is used to indicate the allocation amount of the power reserve value used by the battery under the special working condition; 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 embodiments, determining the additional power of the battery under the special working condition according to the first state information, the second state information and the power reserve value includes: determining the power reserve 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, where the control coefficient is used to indicate the distribution strategy of the power reserve value under the special working condition; and determining the additional power according to the power reserve value and the control coefficient.

[0008] In some possible embodiments, the power reserve value includes an output power reserve value, the first state information includes the temperature information and the state of charge information of the battery, the second state information includes limit discharge information for indicating a limit discharge signal, and 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. Determining whether the vehicle is in a special working condition according to the first state information and the second state information of the vehicle includes: if it is detected that the limit discharge signal indicated by the limit discharge information, 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, where the first special working condition is used to indicate a working condition that allows the battery to use the output power reserve value.

[0009] In some possible embodiments, the control coefficient includes a first control coefficient, the first control coefficient is used to indicate the distribution strategy of the power reserve value under the first special working condition, the limit discharge signal includes a first signal for starting the engine of the vehicle, and the second state information further includes the start times, start time and the initial start water temperature of the engine under the first special working condition. Determining the control coefficient of the battery under the special working condition according to the second state information includes: determining the first control coefficient according to the start times, the start time and the initial start water temperature.

[0010] In some possible embodiments, the power reservation value includes an input power reservation value, the first state information includes the temperature information and the state of charge information of the battery, the second state information includes an extreme charging information for indicating an extreme charging signal, and the difference between the input power of the battery indicated by the extreme charging signal and the corresponding available power is less than a second difference threshold. Determining whether the vehicle is in a special working condition according to the first state information and the second state information of the vehicle includes: if it is detected that the extreme charging signal indicated by the extreme charging information, 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, and the second special working condition is used to indicate a working condition that allows the battery to use the input power reservation value.

[0011] In some possible embodiments, the control coefficient includes a second control coefficient, and the second control coefficient is used to indicate the allocation strategy for the power reservation value in the second special working condition. The extreme charging signal includes a second signal for indicating that the engine of the vehicle continuously charges the battery, and the second state information further includes the input power of the engine and the charging time of the engine in the second special working condition. 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.

[0012] In some possible embodiments, the first state information includes the actual working power of the battery. 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 includes: 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.

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

[0014] In some possible embodiments, correcting the available power by taking the extreme value between the actual working power and the available power includes: if the battery is in a charging mode, taking the 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 the minimum value between the actual working power and the corresponding available power as the corrected available power.

[0015] Second aspect, the present application provides a control device for a vehicle battery, including: an acquisition module, configured to acquire calibration information of the battery under different working conditions, first state information of the battery, and second state information of the vehicle, where the calibration information includes a power reserve value and available power of the vehicle under non-special working conditions, and the non-special working conditions are used to indicate working conditions where the battery is not allowed to use the power reserve value. A first determination module, configured to determine whether the vehicle is in a special working condition according to the first state information and the second state information, where the special working condition is used to indicate a working condition where the battery is allowed to use the power reserve value. A second determination module, configured to, if the vehicle is in the special working condition, 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 reserve value, where the additional power is used to indicate an allocation amount of the power reserve value used by the battery under the special working condition. A control module, configured to control the 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 determination module is configured to determine the power reserve 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, where the control coefficient is used to indicate an allocation strategy for the power reserve value under the special working condition; and determine the additional power according to the power reserve value and the control coefficient.

[0017] In some possible implementation manners, the power reserve value includes an output power reserve value, the first state information includes temperature information and state of charge information of the battery, the second state information includes limit discharge information for indicating a limit discharge signal, a 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 first determination module is configured to, if it is detected that the limit discharge signal indicated by the limit discharge information 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, determine that the vehicle is in a first special working condition, where the first special working condition is used to indicate a working condition where the battery is allowed to use the output power reserve value.

[0018] In some possible embodiments, the control coefficient includes a first control coefficient, which is used to indicate the allocation strategy for the power reserve value under the first special condition. The limit discharge signal includes a first signal for starting the vehicle's engine. The second state information further includes the starting times, starting time, and the initial starting water temperature of the engine under the first special condition. The second determination module is used to determine the first control coefficient according to the starting times, the starting time, and the initial starting water temperature.

[0019] In some possible embodiments, the power reserve value includes an input power reserve value. The first state information includes the temperature information and state of charge information of the battery. The second state information includes limit charge information for indicating a limit charge signal, and the difference between the input power of the battery indicated by the limit charge signal and the corresponding available power is less than a second difference threshold. The first determination module is used to determine that the vehicle is in a second special condition if it detects the limit charge signal indicated by the limit charge information, 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. The second special condition is used to indicate a condition that allows the battery to use the input power reserve value.

[0020] In some possible embodiments, the control coefficient includes a second control coefficient, which is used to indicate the allocation strategy for the power reserve value under the second special condition. The limit charge signal includes a second signal for indicating that the vehicle's engine continuously charges the battery. The second state information further includes the input power of the engine and the charging time of the engine under the second special condition. The second determination module is used to determine the second control coefficient according to the input power and the charging time.

[0021] In some possible embodiments, the first state information includes the actual working power of the battery. The control module is used to correct the available power according to the actual working power; and determine the working power of the battery under the special condition according to the corrected available power and the bias power.

[0022] In some possible embodiments, the control module corrects the available power by taking the extreme value between the actual working power and the available power.

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

[0024] In a third aspect, the present application provides an electronic device for controlling a vehicle battery, including: a memory storing at least one program instruction for controlling a vehicle battery; a processor, when the program instruction is executed by the processor, enabling the vehicle to implement the control method in the first aspect or any possible embodiment of the first aspect of the present application.

[0025] In a fourth aspect, the present application provides a computer program (product), the computer program (product) including a computer program / instructions, and when the computer program / instructions are executed by a processor, enabling the vehicle to implement the control method in the first aspect or any possible embodiment of the first aspect of the present application.

[0026] In a fifth aspect, the present application provides a computer-readable storage medium storing program instructions for controlling a vehicle battery, and when the program instructions are executed by one or more processors, enabling the vehicle to implement the control method in the first aspect or any possible embodiment of the first aspect of the present application.

[0027] The beneficial effects of the technical solution provided by the present application at least include:

[0028] For the technical solution provided by the present application, on the one hand, the available power of the vehicle under non-special working conditions meets the power usage requirements of the vehicle for the battery under non-special working conditions, and by setting a power reserve value, a certain buffer space is formed between the available power used by the vehicle under non-special working conditions and the boundary power of the battery, avoiding overcharging or over-discharging phenomena that may occur when the vehicle suddenly changes from a non-special working condition to a special working condition, and more reasonably allocating the battery power. On the other hand, the present application also determines whether the current working condition of the vehicle is a special working condition based on the first state information of the battery and the second state information of the vehicle, and further adaptively allocates a certain amount of power reserve value for the special working condition according to the first state information and the second state information, enabling the demand for the power reserve value of the vehicle under special working conditions to be more accurate. The above control method can not only optimize the battery usage performance, extend the battery service life, but also greatly improve the reliability of vehicle operation. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0030] Figure 1 is a schematic diagram of the implementation scenario provided by the embodiment of the present application;

[0031] Figure 2 is a flowchart of the control method for the vehicle battery provided by the embodiment of the present application;

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

[0033] Figure 4 is a schematic structural diagram of the electronic device for controlling the vehicle battery provided by the embodiment of the present application. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0035] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

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

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

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

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

[0040] Figure 2 It is a flowchart of the control method for a vehicle battery provided by an embodiment of this application. This control method can be executed by the vehicle control unit, for example, and this application makes no restrictions in this regard. Refer to Figure 2 The control method for the vehicle battery provided by the embodiment of this application may include the following steps.

[0041] Step S210: Obtain 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. The calibration information includes a power reserve value and the available power of the vehicle under non-special working conditions. Non-special working conditions are used to indicate working conditions where the battery is not allowed to use the power reserve value.

[0042] Exemplarily, the calibration information of the battery may include multiple calibration information corresponding one-to-one to different working conditions; similarly, the power reserve value of the battery and the available power of the vehicle under non-special working conditions may also include multiple power reserve values corresponding one-to-one to different working conditions and multiple available powers of the vehicle under non-special working conditions.

[0043] Among them, the power reserve value of the battery can be determined, for example, based on the difference between the boundary power of the battery (i.e., the maximum power that the battery can safely input or output under specific working conditions) and the actual demand power of the vehicle under specific working conditions (such as specific SOC and temperature). The power reserve 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] The boundary power of the battery can be determined by querying the power map of the battery. The power map of the battery may include a chart drawn based on the maximum power that the battery can safely input or output under different working conditions, or may 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. This application makes no restrictions in this regard.

[0045] The actual required power of the vehicle may include, for example, multiple dynamically changing actual required powers determined according to the operating powers of all electrical devices in the vehicle and the driving requirements for the vehicle under different driving conditions; it may also include the maximum value among the multiple actual required powers determined according to the operating powers of all electrical devices in the vehicle and the driving requirements for the vehicle under different driving conditions. The present application does not impose any restrictions on this. The available power of the vehicle under non-special operating conditions can be determined according to the reserved power value of the battery and the boundary power of the battery. For example, it can 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 method for obtaining the calibration information of the battery under different operating conditions may include, for example, obtaining the calibration information of the battery under different operating 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. Among them, the method for obtaining the calibration information of the battery under different conditions by exchanging data with the cloud may include, for example, sending a request instruction for calibration information to the cloud through any wireless communication method such as Bluetooth, WIFI (Wireless Fidelity), or cellular network to request the cloud to send the calibration information.

[0047] Optionally, the first state information of the battery may include, for example, any information such as the temperature information, state of charge information, and health state information of the battery that can reflect the operating conditions and status of the battery. The method for obtaining the first state information may be, for example, directly collected through the sensors carried in the vehicle, or may be calculated based on the information collected by the sensors. Similarly, the second state information of the vehicle may include any information related to the power system (such as the engine), transmission system, electronic system, driving behavior, etc. of the vehicle that can reflect the operating status of the vehicle. The method for obtaining the second state information may be, for example, directly collected through the sensors carried in the vehicle, or may be calculated based on the information collected by the sensors.

[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. The available power of the vehicle under non-special working conditions 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 under non-special working conditions can cover the actual demand power of the vehicle. After a part of the battery power is allocated as the available power of the vehicle under non-special working conditions, another part of the power reserved in advance (i.e., the power reservation value) can be used as a buffer space between the available power used by the vehicle under non-special working conditions and the boundary power of the battery, so as to avoid overcharging or over-discharging phenomena that may occur in the battery under some working conditions. The overcharging or over-discharging phenomena that may occur in the battery under some working conditions can include, for example, when the charging or discharging ability of the battery is affected by factors such as temperature and remaining power and decreases, the maximum output or input power available to the battery will also decrease, resulting in the actual remaining power that can be allocated and used by the battery being less than the available power of the vehicle under non-special working conditions after setting the pre-reserved power reservation value, or the actual remaining power that can be allocated and used by the battery cannot cover the actual demand power of the vehicle.

[0049] In view of this, in the embodiment of the present application, by setting a part of the pre-reserved power reservation value at the boundary power of the battery, the battery power can be more reasonably allocated, so that the battery can meet the actual demand power of the vehicle under non-special working conditions while avoiding overcharging or over-discharging that may occur during the operation of the battery, which is beneficial to improving the service performance and service life of the battery and ensuring the stability of the battery operation.

[0050] Step S220: Determine whether the vehicle is in a special working condition according to the first state information and the second state information, where the special working condition is used to indicate a working condition that allows the battery to use the power reservation value.

[0051] As described above, when the charging or discharging ability of the battery decreases, the actual remaining power that can be allocated and used by the battery may not be able to cover the actual demand power of the vehicle. In view of this, the working condition in which the actual remaining power that can be allocated and used by the battery may not be able to 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 under the special working condition can be separately controlled differently from the non-special working condition. For example, the pre-reserved power reservation value of the battery can be released to meet the actual power demand of the vehicle under the special working condition, and prevent the situation that the vehicle cannot maintain the current driving state due to insufficient power that can be allocated and used by the battery, so as to ensure the stability of the vehicle operation.

[0052] Also considering that in actual application scenarios, both the working conditions and status of the battery and the running status of the vehicle will affect the charging or discharging ability of the battery. In view of this, it is possible to determine whether the vehicle is in a special working condition that allows the use of the power reserve value of the battery based on the first state information of the battery that can reflect the working conditions and status of the battery and the second state information of the vehicle that can reflect the running status of the vehicle.

[0053] It is also considered that the factors causing the decrease in the charging ability and discharging ability of the battery may be different, and moreover, after the charging ability of the battery decreases, the demand for the power reserve value is not the same as that after the discharging ability of the battery decreases. In view of this, in order to more timely and accurately judge the current charging or discharging ability of the battery, and then improve the control efficiency of the battery of the vehicle under special working conditions, it is possible to distinguish between the special working conditions corresponding to the decrease in the discharging ability of the battery and the special working conditions corresponding to the decrease in the charging ability of the battery.

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

[0055] Among them, the first special working condition is used to indicate the working condition that allows the battery to use the output power reserve value. The difference between the output power of the battery indicated by the limit discharge signal and the available power of the corresponding vehicle under non-special working conditions is less than the first difference threshold. When it is detected that the limit discharge signal indicated by the limit discharge information, the actual remaining power that can be allocated for use by the battery of the vehicle under the first special working condition may not be able to cover the actual demand power of the vehicle. At this time, the discharge power reserve value in the power reserve value reserved in advance by the battery can be released to meet the special discharge demand of the vehicle under the first special working condition. The values of the first difference threshold, the first low temperature threshold, and the first state of charge threshold can be adjusted according to the actual application situation.

[0056] The first special operating condition may be, for example, that a limit discharge signal is detected and the temperature indicated by the temperature information is lower than the first low temperature threshold; or it may be that a limit discharge signal is detected, 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 the first state of charge threshold; or it may be that a 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 under non - special operating conditions can be obtained, for example, in the following way: Determine the first operating condition of the battery according to the first state information when the vehicle generates the limit discharge signal, determine the available power of the vehicle corresponding to the limit discharge signal under non - special operating conditions according to the first calibration information of the battery under the first operating condition, and calculate the difference between the available power of the vehicle corresponding to the limit discharge signal under non - special operating conditions and the output power of the battery indicated by the limit discharge signal.

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

[0059] Among them, the second special operating condition is used to indicate the operating condition that allows the battery to use the input power reserve value. The difference between the input power of the battery indicated by the limit charge signal and the available power of the corresponding vehicle under non - special operating conditions is less than the second difference threshold. When a limit charge signal indicated by the limit charge information is detected, the actual remaining power that can be allocated for use by the battery of the vehicle under the second special operating condition may not be able to cover the actual demand power of the vehicle. At this time, the charging power reserve value in the power reserve value reserved by the battery in advance can be released to meet the special discharge demand of the vehicle under the second special operating 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; the specific values of the second difference threshold, the second low temperature threshold, and the second state of charge threshold can be adjusted according to actual application requirements, and the present application does not make any restrictions in this regard.

[0060] The second special working condition can be, for example, that a limit charging signal is detected and the temperature indicated by the temperature information is lower than the second low-temperature threshold; or it can be that a limit charging signal is detected and the state of charge indicated by the state-of-charge information is higher than the second state-of-charge threshold; or it can be that a limit charging signal is detected, 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 under non-special working conditions can be obtained, for example, in the following way: determine the second working condition of the battery according to the first state information when the vehicle generates the limit charging signal, determine the available power of the vehicle corresponding to the limit charging signal under non-special working conditions according to the second calibration information of the battery under the second working condition, and calculate the difference between the available power of the vehicle corresponding to the limit charging signal under non-special working conditions and the input power of the battery indicated by the limit charging signal.

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

[0063] As described above, the first state information can reflect the charging or discharging ability of the battery, and the second state information can be used to reflect the actual required power of the vehicle. When the vehicle is in a special working condition, the decrease amplitude of the charging or discharging ability of the battery can be determined according to the first state information of the battery, the actual required power of the vehicle can be determined according to the second state information of the vehicle, and then, after determining the decrease in the charging or discharging ability of the battery, the difference between the actual remaining power that can be allocated for use by the battery and the actual required power of the vehicle can be determined. Based on the difference between the actual remaining power that can be allocated for use by the battery and the actual required power of the vehicle, the battery can be allowed to allocate and use some or all of the pre-reserved power reserve value to meet the power requirements of the vehicle under the special working condition, that is, to determine the additional power of the battery under the special working condition.

[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 requirements of the vehicle for the battery under special working conditions. At the same time, since the size of the power reserve value limits the upper limit of the additional power, it also avoids the overcharging or over-discharging conditions that may occur to the battery due to excessive additional power when the vehicle determines the additional power under special working conditions.

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

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

[0067] In some embodiments, the first special working condition corresponding to the decrease in the discharge capacity of the battery may be, for example, the first special working condition in which the discharge capacity of the battery decreases due to a low temperature environment and / or a low remaining battery charge, and further the output power of the battery cannot meet the actual required power of the vehicle when starting the engine. Considering that when the battery is in a low temperature environment and / or the remaining battery charge is low, the starting water temperature of the engine will affect the output power of the battery when starting the engine, or as the number of engine starts and the starting time increase, the discharge capacity of the battery may further decrease, resulting in a possible change in the power reserve value to be allocated.

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

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

[0070] In some embodiments, the second special working condition corresponding to the decrease in the charging ability of the battery may be, for example, a second special working condition in which the low-temperature environment and / or high remaining power cause the charging ability of the battery to decrease, and further cause the input power of the battery to be unable to meet the actual demand power of the vehicle when the vehicle's engine continuously charges the battery (for example, it may include that the engine charges 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, both the charging power and charging time when the engine charges the battery will affect the power reserve value to be allocated. In view of this, when the extreme charging signal is the second signal for instructing the vehicle's engine to continuously charge the battery, the control coefficient may include, for example, a second control coefficient. 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. Determining the control coefficient of the battery under the special working condition according to the second state information may include, for example: determining the second control coefficient according to the input power and charging time. Among them, the second control coefficient can be used for, but not limited to, indicating the allocation strategy of the power reserve value under the second special working condition. The input power is negatively correlated with the second control coefficient, and the charging time is positively correlated with the second control coefficient.

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

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

[0074] As described above, the available power of the vehicle under non - special working conditions can be equal to the difference between the boundary power of the battery and the power reserve value, and the power reserve 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 under non - special working conditions can be used to meet the actual demand power of the vehicle under non - special working conditions. As described above, when the charging or discharging ability of the battery decreases and the battery cannot meet the actual power demand of the vehicle (i.e., the vehicle is in a special working condition), the power reserve value can be released to ensure the stability of the vehicle operation. In the embodiments of the present application, the available power of the vehicle under non - special working conditions and the additional power under special working conditions can not only meet the reasonable use of the battery boundary power under non - special working conditions, avoid over - charging or over - discharging phenomena (i.e., set a power reserve value at the boundary power), but also adaptively release the power reserve value in special working conditions to meet the special needs of special working conditions.

[0075] Also, considering that the available power of the vehicle under non - special working conditions is a calibrated value under specific experimental conditions, there may be a certain deviation from the true value during the vehicle driving process. In view of this, the available power of the vehicle under non - special working conditions can also be corrected according to the actual working power of the battery to further improve the rationality of battery power control.

[0076] In some embodiments, the first state information includes the actual working power of the battery. Controlling the working power of the battery under special working conditions according to the first state information, available power, and additional power may include: correcting the available power according to the actual working power; determining the working power of the battery under special working conditions according to the corrected available power and the additional power. Among them, the method of determining the working power of the battery under special working conditions according to the corrected available power and the additional power may be, for example, determining the sum of the corrected available power and the additional power as the working power of the battery under special working conditions.

[0077] Also considering that the usage duration, health status, etc. of the battery will also affect the charging or discharging ability of the battery. In some embodiments, after determining the working power of the battery under special working conditions according to the corrected available power and the additional power, the method provided in the embodiments of the present application may further include: correcting the working power of the battery under special working conditions according to the usage duration or health status of the battery. The method of correcting the working power of the battery under special working conditions according to the usage duration or health status of the battery may refer to the following criteria, for example: when the usage duration of the battery increases or the health status decreases, the working power of the battery under special working conditions is amplified by a certain proportion. Among them, the amplification ratio when amplifying the working power of the battery under special working conditions can be adjusted according to the actual application situation, and the present application does not make any restrictions in this regard.

[0078] In some other embodiments, the method for correcting the available power according to the actual working power may be, for example, to correct the available power by taking the extreme value between the actual working power and the available power. For example, if the battery is in the charging mode, the maximum value between the actual working power and the corresponding available power is used as the corrected available power. Or, if the battery is in the discharging mode, the minimum value between the actual working power and the corresponding available power is used as the corrected available power. Among them, the maximum value between the actual working power and the corresponding available power may be, for example, the maximum value of the two of the actual working power and the corresponding available power; the minimum value between the actual working power and the corresponding available power may be, for example, the minimum value of the two of the actual working power and the corresponding available power.

[0079] On the one hand, the technical solution provided by the present application satisfies the vehicle's demand for battery power under non-special working conditions through the available power of the vehicle under non-special working conditions. By setting a power reserve value, a certain buffer space is formed between the available power used by the vehicle under non-special working conditions and the boundary power of the battery, avoiding overcharging or over-discharging phenomena that may occur when the vehicle suddenly changes from a non-special working condition to a special working condition, and more reasonably allocating the battery power. On the other hand, the present application also 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 reserve value for the special working condition according to the first state information and the second state information, so that the vehicle's demand for the power reserve value under special working conditions can be more accurate. The above control method can not only optimize the battery usage performance and extend the battery service life, but also greatly improve the reliability of vehicle operation.

[0080] In some other possible implementation manners, the present application also provides a control device for a vehicle battery. Figure 3 is a schematic structural diagram of the control device for a vehicle battery provided by an embodiment of the present application. Refer to Figure 3 , the control device for a vehicle battery provided by the embodiment of the present application includes the following modules.

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

[0082] A first determination module 320, configured to determine whether the vehicle is in a special working condition according to the first state information and the second state information. The special working condition is used to indicate a working condition where the battery is allowed to use the power reserve value.

[0083] The second determination module 330 is configured to, if the vehicle is in a special working condition, determine the additional power of the battery under the special working condition according to the first state information, the second state information, and the power reserve value, where the additional power is used to indicate the allocated amount of the power reserve value used by the battery under the special working condition.

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

[0085] In some possible implementation manners, the second determination module 330 is configured to determine the power reserve value corresponding to the first state information; determine the control coefficient of the battery under the special working condition according to the second state information, where the control coefficient is used to indicate the allocation strategy for the power reserve value under the special working condition; and determine the additional power according to the power reserve value and the control coefficient.

[0086] In some possible implementation manners, the power reserve value includes an output power reserve value, the first state information includes the temperature information and the state of charge information of the battery, the second state information includes the limit discharge information for indicating 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 the first difference threshold, and the first determination module 320 is configured to, if it detects the limit discharge signal indicated by the limit discharge information, and the temperature indicated by the temperature information is lower than the first low temperature threshold and / or the state of charge indicated by the state of charge information is lower than the first state of charge threshold, determine that the vehicle is in a first special working condition, where the first special working condition is used to indicate the working condition that allows the battery to use the output power reserve 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 for the power reserve value under the first special working condition, the limit discharge signal includes a first signal for starting the engine of the vehicle, the second state information further includes the start times, the start time, and the initial start water temperature of the engine under the first special working condition, and the second determination module 330 is configured to determine the first control coefficient according to the start times, the start time, and the initial start water temperature.

[0088] In some possible implementation manners, the power reserve value includes an input power reserve value, the first state information includes the temperature information and the state of charge information of the battery, the second state information includes the limit charge information for indicating a limit charge signal, the difference between the input power of the battery indicated by the limit charge signal and the corresponding available power is less than the second difference threshold, and the first determination module 320 is configured to, if it detects the limit charge signal indicated by the limit charge information, and the temperature indicated by the temperature information is lower than the second low temperature threshold and / or the state of charge indicated by the state of charge information is higher than the second state of charge threshold, determine that the vehicle is in a second special working condition, where the second special working condition is used to indicate the working condition that allows the battery to use the input power reserve value.

[0089] In some possible embodiments, the control coefficient includes a second control coefficient, which is used to indicate the allocation strategy for the power reservation value under the second special working condition. The limit charging signal includes a second signal for indicating that the vehicle's engine continuously charges the battery. The second state information further includes the input power of the engine and the charging time of the engine under the second special working condition. The second determination module 330 is configured to determine the second control coefficient according to the input power and the charging time.

[0090] In some possible embodiments, the first state information includes the 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 under the special working condition according to the corrected available power and the additional power.

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

[0092] In some possible embodiments, if the battery is in the charging mode, the control module 340 takes the maximum value between the actual working power and the corresponding available power as the corrected available power; or, if the battery is in the discharging mode, the control module 340 takes the minimum value between the actual working power and the corresponding available power as the corrected available power.

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

[0094] In some other possible embodiments, the present application further provides an electronic device for controlling a vehicle battery. Figure 4 is a schematic structural diagram of the electronic device for controlling a vehicle battery provided by the embodiments of the present application. Refer to Figure 4 , the electronic device for controlling a vehicle battery provided by the embodiments of the present application includes:

[0095] A memory 410, on which at least one program instruction for controlling a vehicle battery is stored.

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

[0097] In some other possible embodiments, the present application further provides a computer program (product), the computer program (product) includes computer programs / instructions, and the computer programs / instructions are executed by a processor to enable the vehicle to implement the steps of the control method and its multiple embodiments described above in combination with Figure 2 the described control method and its multiple embodiments.

[0098] In some other possible embodiments, the present application further provides a computer-readable storage medium, on which program instructions for controlling a vehicle battery are stored. When the program instructions are executed by one or more processors, the vehicle is enabled to implement the steps of the control method and its multiple embodiments described above in combination with Figure 2 the described control method and its multiple embodiments. The computer-readable storage medium can be a readable signal medium or a readable storage medium. The readable storage medium can, for example, but is not limited to, be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, 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 disk 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", etc. (if any) in the specification and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0100] The term "and / or" in the embodiments of this application is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0101] The above is only for the convenience of those skilled in the art to understand the technical solution of this application and is not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A vehicle battery control method, characterized in that: The control method comprises: Acquire 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 includes a power reserve value and available power of the vehicle under non-special working conditions, wherein the non-special working condition is used to indicate a working condition that does not allow the battery to use the power reserve value; determining whether the vehicle is in a special operating condition according to the first state information and the second state information, the special operating condition being used to indicate an operating condition in which the battery is allowed to use the power reserve value; If the vehicle is in the special operating condition, determining the biased power of the battery under the special operating condition according to the first state information, the second state information and the power reserved value, wherein the biased power is used to indicate the allocation amount of the power reserved value used by the battery under the special operating condition; The operating power of the battery under the special working condition is controlled according to the first state information, the available power and the biased power.

2. The control method according to claim 1, characterized in that: The determining the biased power of the battery under the special working condition according to the first state information, the second state information and the power reservation value includes: Determining the power reservation value corresponding to the first state information; determining a control coefficient of the battery under the special operating condition according to the second state information, wherein the control coefficient is used to indicate an allocation strategy for the power reservation value under the special operating condition; The biased power is determined according to the power reservation value and the control coefficient.

3. The control method according to claim 2, characterized in that: 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 for indicating 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 determining whether the vehicle is in a special operating condition according to the first state information and the second state information of the vehicle includes: If the limit discharge signal indicated by the limit discharge information is detected, and the temperature indicated by the temperature information is lower than the first low temperature threshold and / or the state of charge indicated by the state of charge information is lower than the first charge threshold, it is determined that the vehicle is in a first special operating condition, and the first special operating condition is used to indicate the operating condition that allows the battery to use the output power reserved value.

4. The control method according to claim 3, characterized in that: The control coefficient includes a first control coefficient, and the first control coefficient is used to indicate an allocation strategy for the power reserve value under the first special operating condition. The limit discharge signal includes a first signal for starting the engine of the vehicle. The second state information also includes the number of starts of the engine under the first special operating condition, the start time, and the initial start water temperature of the engine. The control coefficient of the battery under the special operating condition is determined according to the second state information, including: The first control coefficient is determined according to the number of starts, the start time and the initial start water temperature.

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

6. The control method according to claim 5, characterized in that: The control coefficient includes a second control coefficient, and the second control coefficient is used to indicate an allocation strategy for the power reserve value under the second special operating condition. The limit charging signal includes a second signal for indicating that the engine of the vehicle continuously charges the battery. The second state information also includes the input power of the engine and the charging time of the engine under the second special operating condition. The determining the control coefficient of the battery under the special operating condition according to the second state information includes: The second control coefficient is determined according to the input power and the charging time.

7. The control method according to any one of claims 1 to 6, characterized in that: The first state information includes the actual working power of the battery, and the controlling the working power of the battery under the special working condition according to the first state information, the available power and the biased power includes: Correcting the available power according to the actual working power; The operating power of the battery under the special working condition is determined according to the corrected available power and the biased power.

8. The control method according to claim 7, characterized in that: The correcting the available power according to the actual working power comprises: The available power is corrected by taking an extreme value between the actual working power and the available power.

9. The control method according to claim 8, characterized in that: 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 charging mode, the maximum value between the actual working power and the corresponding available power is used as the corrected available power; or, If the battery is in a discharge mode, the minimum value between the actual working power and the corresponding available power is used as the corrected available power.

10. An electronic device, characterized in that: include: a memory having stored thereon program instructions for controlling a vehicle battery; as well as The processor, when the program instructions are executed by the processor, enables the vehicle to implement the control method described in any one of claims 1-9.

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