Electric vehicle battery control method, device, system and electric vehicle

Abstract

The present application is applicable to the technical field of electric vehicle battery control, and provides an electric vehicle battery control method, device, system and electric vehicle. When the duration of a battery sensor in a dormant state reaches a first target interval time, the battery sensor is awakened, and the current health status and the current remaining power of the battery are obtained through the battery sensor; the first target interval time is the target interval time determined in the previous control cycle; the target charging time is determined according to the current health status and the current remaining power; the high-voltage battery pack is controlled to charge the battery, and when the charging duration of the battery reaches the target charging time, the second target interval time is determined according to the health status and the remaining power of the charged battery; the second target interval time is used as the target interval time of the next control cycle; the battery sensor is controlled to enter a dormant state, which solves the problem of battery power loss caused by long-term storage of the electric vehicle.

Description

Technical Field

[0001] This application belongs to the technical field of electric vehicle battery control, and particularly relates to an electric vehicle battery control method, device, system and electric vehicle. Background Art

[0002] With the development of technology, the vehicle configuration is getting higher and higher, and accordingly, there are more and more vehicle electrical components. The power consumption of electric vehicles is increasing, and conventional lead-acid batteries are facing huge challenges. Especially after the electric vehicle is powered off or enters the sleep state, the function realization and static current consumption of the whole vehicle both require the lead-acid battery to provide energy. Long-term placement of the electric vehicle may cause the lead-acid battery to be discharged, resulting in the vehicle being unable to be powered on for use. Summary of the Invention

[0003] The embodiments of this application provide an electric vehicle battery control method, device, system and electric vehicle, which can solve the problem of battery discharge caused by long-term placement of electric vehicles.

[0004] In a first aspect, the embodiments of this application provide an electric vehicle battery control method, including:

[0005] When the duration for which the battery sensor is in the sleep state reaches a first target interval time, wake up the battery sensor, and obtain the current health status and current remaining power of the battery through the battery sensor; the first target interval time is the target interval time determined in the previous control cycle, and the time from the moment when the battery sensor is woken up to the next moment when the battery sensor is woken up is one control cycle;

[0006] Determine a target charging time according to the current health status and the current remaining power;

[0007] Control the high-voltage battery pack to charge the battery, and when the charging duration of the battery reaches the target charging time, determine a second target interval time according to the health status and remaining power of the battery after charging; the second target interval time is used as the target interval time for the next control cycle;

[0008] Control the battery sensor to enter the sleep state.

[0009] Optionally, the determining the target charging time according to the current health status and the current remaining power includes:

[0010] When SOC A ≥SOC1, determine that the target charging time is zero;

[0011] When SOC A <SOC2, and SOH AWhen SOH ≥ SOH1, determine the first charging time as the target charging time;

[0012] When SOC2 ≤ SOC A < SOC1 and SOH A ≥ SOH1, determine the second charging time as the target charging time;

[0013] When SOC2 ≤ SOC A < SOC1 and SOH A < SOH1, determine the third charging time as the target charging time;

[0014] When SOC A < SOC2 and SOH A < SOH1, determine the fourth charging time as the target charging time;

[0015] Wherein, SOC A is the current remaining battery charge, SOC1 is the first preset battery charge, SOC2 is the second preset battery charge, SOH A is the characterization parameter value of the current health status, SOH1 is the preset parameter value, the first charging time is greater than or equal to the second charging time, the second charging time is greater than the third charging time, and the third charging time is greater than or equal to the fourth charging time.

[0016] Optionally, controlling the high-voltage battery pack to charge the storage battery includes:

[0017] Obtain the charging current of the storage battery;

[0018] When the duration of the charging current being less than the preset current reaches the first preset time, control the high-voltage battery pack to stop charging the storage battery.

[0019] Optionally, controlling the high-voltage battery pack to charge the storage battery further includes:

[0020] Obtain the temperature value of the storage battery body;

[0021] When the temperature value is greater than or equal to the preset temperature value, control the high-voltage battery pack to charge the storage battery with the first charging voltage;

[0022] When the temperature value is less than the preset temperature value, control the high-voltage battery pack to charge the storage battery with the second charging voltage, and the second charging voltage is less than the first charging voltage.

[0023] Optionally, determining the second target interval time according to the health status and remaining battery charge of the charged storage battery includes:

[0024] When the state of charge (SOC) B ≥ SOC1, determine the first interval time as the second target interval time;

[0025] When SOC2 ≤ SOC B < SOC1 and the state of health (SOH) B ≥ SOH1, determine the second interval time as the second target interval time;

[0026] When SOC2 ≤ SOC B < SOC1 and the state of health (SOH) B < SOH1, determine the third interval time as the second target interval time;

[0027] When SOC B < SOC2 and the state of health (SOH) B ≥ SOH1, determine the fourth interval time as the second target interval time;

[0028] When SOC B < SOC2 and the state of health (SOH) B < SOH1, determine the fifth interval time as the second target interval time;

[0029] Wherein, SOC B is the remaining power of the battery after charging, SOC1 is the first preset power, SOC2 is the second preset power, SOH B is the characterization parameter value of the state of health of the battery after charging, SOH1 is the preset parameter value, the first interval time is greater than the second interval time, the second interval time is greater than the third interval time, the third interval time is greater than the fourth interval time, and the fourth interval time is greater than the fifth interval time.

[0030] Optionally, the electric vehicle battery control method further includes:

[0031] When the duration of the battery sensor in the sleep state reaches the first target interval time, obtain the output current of the battery;

[0032] When the output current is greater than the preset current, after determining the second target interval time according to the state of health and the remaining power of the battery after charging, control the relay to disconnect the connection between the battery and the load.

[0033] Optionally, after controlling the relay to disconnect the connection between the battery and the load, it further includes:

[0034] When the duration of the relay in the open state reaches the second preset time, control the relay to close;

[0035] When the duration of the battery sensor being in the dormant state reaches the second target interval time, obtaining the output current of the battery again;

[0036] When the output current is still greater than the preset current, the breaker is controlled to disconnect the battery and the load for a second time, and the breaker cannot be automatically closed after being disconnected for the second time.

[0037] In a second aspect, an embodiment of the present application provides an electric vehicle battery control device, comprising:

[0038] an acquisition module, configured to wake up the battery sensor when the duration of the battery sensor being in a dormant state reaches a first target interval time, and acquire the current health status and the current remaining power of the battery through the battery sensor; the first target interval time is the target interval time determined in the previous control cycle, and the time when the battery sensor is awakened to the time when the battery sensor is awakened next time is one control cycle;

[0039] A target charging time determination module, configured to determine a target charging time according to the current health status and the current remaining power;

[0040] A charging module, used for controlling the high-voltage battery pack to charge the storage battery, and when the charging duration of the storage battery reaches the target charging time, determining a second target interval time according to the health status and remaining power of the storage battery after charging; the second target interval time is used as the target interval time of the next control cycle;

[0041] The control module is used to control the battery sensor to enter a dormant state.

[0042] In the third aspect, an embodiment of the present application provides an electric vehicle battery control system, comprising a battery, a battery sensor, a high-voltage battery pack and a controller, wherein the battery is electrically connected to the battery sensor and the high-voltage battery pack, respectively, and the battery sensor and the high-voltage battery pack are both electrically connected to the controller; the battery sensor is used to collect the health status and remaining power of the battery, and transmit the health status and remaining power of the battery to the controller; the high-voltage battery pack is used to charge the battery according to the instructions of the controller; and the controller is used to execute any one of the methods described in the first aspect.

[0043] In a fourth aspect, an embodiment of the present application provides an electric vehicle, comprising the electric vehicle battery control system described in the third aspect.

[0044] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method as described in any one of the first aspects is implemented.

[0045] In a sixth aspect, an embodiment of the present application provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute any of the methods described in the first aspect above.

[0046] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0047] The electric vehicle battery control method provided in this embodiment determines the target interval time based on the health status and remaining power of the battery, realizes the phased detection of the battery parameters, and thus reduces the consumption of battery power. At the same time, the target charging time of the battery is determined according to the health status and remaining power of the battery, and the appropriate charging time is determined to realize automatic charging of the battery, thereby preventing the battery from being depleted; at the same time, it prevents the problem that the high-voltage battery pack still charges the battery when the battery is full, causing damage to the battery and wasting the power of the high-voltage battery pack.

[0048] It can be understood that the beneficial effects of the second to sixth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0050] Figure 1 is a schematic diagram of an electric vehicle battery control system provided by an embodiment of the present application;

[0051] Figure 2 It is a flow chart of an electric vehicle battery control method provided by an embodiment of the present application;

[0052] Figure 3 is a flow chart of an electric vehicle battery control method provided by another embodiment of the present application;

[0053] Figure 4 is a flow chart of an electric vehicle battery control method provided by another embodiment of the present application;

[0054] Figure 5is a flow chart of an electric vehicle battery control method provided by another embodiment of the present application;

[0055] Figure 6 It is a structural schematic diagram of an electric vehicle battery control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0057] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0058] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0059] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0060] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0061] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0062] Figure 1 FIG. 1 is a schematic diagram of an electric vehicle battery control system provided by an embodiment of the present application. Figure 1 As shown, the electric vehicle battery control system includes a battery 10, a battery sensor 20, a high-voltage battery pack 30 and a controller 40. The battery 10 is electrically connected to the battery sensor 20 and the high-voltage battery pack 30 respectively, and the battery sensor 20 and the high-voltage battery pack 30 are both electrically connected to the controller 40.

[0063] Specifically, the battery 10 is used to provide power to the load 50 on the electric vehicle, and the battery sensor 20 is used to collect the health status and remaining power of the battery 10 and transmit the health status and remaining power of the battery 10 to the controller 40. The high-voltage battery pack 30 is used to charge the battery 10 according to the instructions of the controller 40.

[0064] When the electric vehicle is powered off, the battery sensor 20 collects the current health status and the current remaining power of the battery 10, and transmits the current health status and the current remaining power of the battery 10 to the controller 40. The controller 40 determines the initial target interval time according to the current health status and the current remaining power of the battery 10. When the initial target interval time is determined, the controller 40 controls the battery sensor 20 to enter a dormant state, and the controller 40 counts the time the battery sensor 20 is in the dormant state.

[0065] When the duration of the battery sensor 20 in the dormant state reaches the first target charging time (the initial target interval time is the first target interval time at this time), the controller 40 wakes up the battery sensor 20 and obtains the current health status and current remaining power of the battery 10 through the battery sensor 20. The first target interval time is the target interval time determined in the previous control cycle (here, the initial target interval time). Then the controller 40 determines the target charging time according to the current health status and the current remaining power, determines the appropriate charging time, and prevents the battery 10 from being depleted; at the same time, it prevents the high-voltage battery pack 30 from still charging the battery 10 when the battery 10 is full, causing damage to the battery 10 and wasting the power of the high-voltage battery pack 30.

[0066] When the target charging time is determined, the controller 40 controls the high-voltage battery pack 30 to charge the battery 10. When the charging duration of the battery 10 reaches the target charging time, the controller 40 determines the second target interval time according to the health status and remaining power of the charged battery 10. The second target interval time is used as the target interval time of the next control cycle. By determining the target interval time according to the health status and remaining power of the battery 10, the phased detection of the parameters of the battery 10 is realized, thereby reducing the consumption of the electric energy of the battery 10. When the second target interval time is determined, the controller 40 controls the battery sensor 20 to enter the dormant state, and the controller 40 starts to count the duration of the battery sensor 20 in the dormant state, and starts the control of the next cycle.

[0067] It should be noted that the battery 10 in this application has the same function as the battery in a traditional car, and is used to provide power for the load on the electric car. The high-voltage battery pack 30 is used to provide power for the power system of the electric car to drive the electric car to run normally.

[0068] The present application also discloses an electric vehicle, including the electric vehicle battery control system described above. When the electric vehicle is powered off, the target interval is determined based on the health status and remaining power of the battery, and the phased detection of the battery parameters is realized, thereby reducing the consumption of battery power. At the same time, the target charging time of the battery is determined based on the health status and remaining power of the battery, and the appropriate charging time is determined to realize automatic charging of the battery, thereby preventing the battery from being depleted; at the same time, it is prevented that the high-voltage battery pack still charges the battery when the battery is full, causing damage to the battery and wasting the power of the high-voltage battery pack.

[0069] Figure 2 FIG. 1 is a flow chart of a method for controlling an electric vehicle battery provided by an embodiment of the present application. Figure 2 As shown, the electric vehicle battery control method includes steps S201 to S204.

[0070] Step S201: When the duration for which the battery sensor is in the sleep state reaches the first target interval time, wake up the battery sensor, and obtain the current health status and the current remaining power of the battery through the battery sensor. The first target interval time is the target interval time determined in the previous control cycle. The time from when the battery sensor is woken up to the next time the battery sensor is woken up is one control cycle.

[0071] Specifically, both the current health status and the current remaining power of the battery are percentage values. The current remaining power is the ratio of the current power value of the battery to the current capacity value, and the current health status is the ratio of the current capacity value of the battery to the rated capacity value.

[0072] Step S202: Determine the target charging time according to the current health status and the current remaining power.

[0073] Specifically, by determining the target charging time according to the current health status and the current remaining power, an appropriate charging duration can be determined to ensure that the remaining power of the battery reaches the requirement after one charge, prevent the battery from being undercharged, and at the same time prevent the problem that the high-voltage battery pack still charges the battery when the battery is full, causing damage to the battery and wasting the electric energy of the high-voltage battery pack.

[0074] Exemplarily, step S202 includes:

[0075] When SOC A ≥SOC1, determine that the target charging time is zero. At this time, the remaining power of the battery is sufficient and there is no need to charge the battery, so the determined target charging time is zero.

[0076] When SOC A <SOC2 and SOH A ≥SOH1, determine the first charging time as the target charging time;

[0077] When SOC2 ≤ SOC A <SOC1 and SOH A ≥SOH1, determine the second charging time as the target charging time;

[0078] When SOC2 ≤ SOC A <SOC1 and SOH A <SOH1, determine the third charging time as the target charging time;

[0079] When SOC A <SOC2 and SOH A <SOH1, determine the fourth charging time as the target charging time;

[0080] Wherein, SOCA is the current remaining power, SOC1 is the first preset power, SOC2 is the second preset power, SOH A is a parameter value characterizing the current health status, SOH1 is a preset parameter value, the first charging time is greater than or equal to the second charging time, the second charging time is greater than the third charging time, and the third charging time is greater than or equal to the fourth charging time.

[0081] Specifically, when the current remaining power of the battery is higher, the determined target charging time is shorter, that is, the charging time required for the battery is shorter. When the current remaining power of the battery is lower, the determined target charging time is longer, that is, the charging time required for the battery is longer. When the characterization parameter of the current health status of the battery is larger, it means that the current health status of the battery is better, the current capacity of the battery is larger, and the determined target charging time is longer, that is, the charging time required for the battery is longer. When the characterization parameter of the current condition of the battery is smaller, it means that the current health status of the battery is worse, the current capacity of the battery is smaller, and the determined target charging time is shorter, that is, the charging time required for the battery is shorter.

[0082] By determining the target charging time based on the current health status and the current remaining power, the optimal charging time can be determined to ensure that the remaining power of the battery meets the requirement after one charge and prevent the battery from running out of power. At the same time, it can prevent the high-voltage battery pack from still charging the battery when the battery is full, causing damage to the battery and wasting the high-voltage battery pack's power.

[0083] It should be noted that the designer can determine the specific values ​​of the first charging time, the second charging time, the third charging time and the fourth charging time through experimental methods to determine the appropriate charging time of the battery.

[0084] Step S203, control the high-voltage battery pack to charge the battery. When the charging duration of the battery reaches the target charging time, determine the second target interval time according to the health status and remaining power of the charged battery. The second target interval time is used as the target interval time of the next control cycle.

[0085] Specifically, the determined second target interval time is the target interval time, that is, when the battery completes a charge, the battery sensor is controlled to enter the sleep state. After the second target interval time, the battery sensor is awakened, and the current health status and current remaining power of the battery are obtained again through the battery sensor. The second target interval time is determined according to the health status and remaining power of the battery. When the health status of the battery is better and the remaining power is higher, the determined second target interval time is longer. When the health status of the battery is worse and the remaining power is lower, the determined second target interval time is shorter. The determined second target interval time may be the same as or different from the first target interval time. Thus, according to the health status and remaining power of the battery, the optimized acquisition (phased acquisition) of the health status and remaining power of the battery is realized, and the power consumption of the battery is reduced.

[0086] Exemplarily, step S203 includes:

[0087] When SOC B ≥SOC1, determine the first interval time as the second target interval time;

[0088] When SOC2 ≤ SOC B < SOC1, and SOH B ≥SOH1, determine the second interval time as the second target interval time;

[0089] When SOC2 ≤ SOC B < SOC1, and SOH B < SOH1, determine the third interval time as the second target interval time;

[0090] When SOC B < SOC2, and SOH B ≥SOH1, determine the fourth interval time as the second target interval time;

[0091] When SOC B < SOC2, and SOH B < SOH1, determine the fifth interval time as the second target interval time;

[0092] Wherein, SOC B is the remaining power of the battery after charging, SOC1 is the first preset power, SOC2 is the second preset power, SOH B is the characterization parameter value of the health status of the battery after charging, SOH1 is the preset parameter value, the first interval time is greater than the second interval time, the second interval time is greater than the third interval time, the third interval time is greater than the fourth interval time, and the fourth interval time is greater than the fifth interval time.

[0093] Specifically, the higher the remaining power of the battery, the larger the value of the parameter characterizing the health of the battery, the longer the time required for the battery to reach a low-power state, and the longer the second target interval determined at this time. The lower the remaining power of the battery, the smaller the value of the parameter characterizing the health of the battery, the shorter the time required for the battery to reach a low-power state, and the shorter the second target interval determined at this time. Thus, the second target interval is determined based on the health of the battery and the remaining power, so as to achieve optimized collection of the health of the battery and the remaining power, and reduce the power consumption of the battery.

[0094] It should be noted that the designer can set specific values ​​of the first interval time, the second interval time, the third interval time, the fourth interval time and the fifth interval time according to the parameters of the battery.

[0095] Step S204, controlling the battery sensor to enter a dormant state.

[0096] Specifically, after the second target interval time is determined, the battery sensor is controlled to enter a dormant state. The electric vehicle battery control method provided in this embodiment is a periodic control, that is, step S201 to step S204 is a control cycle, and step S201 is executed after step S204 is completed, thereby completing the cyclic control of the battery. In the process of battery control, the target interval time is determined by the health status and remaining power of the battery, and the phased detection of the battery parameters is realized, thereby reducing the consumption of battery power. At the same time, the target charging time of the battery is determined according to the health status and remaining power of the battery, and the appropriate charging time is determined to realize automatic charging of the battery to prevent the battery from being depleted; at the same time, it is prevented that the high-voltage battery pack still charges the battery when the battery is full, causing damage to the battery and wasting the power of the high-voltage battery pack.

[0097] Figure 3 FIG. 2 is a flow chart of a method for controlling an electric vehicle battery provided by another embodiment of the present application. Figure 3 As shown, step S203 includes step S2031 and step S2032.

[0098] Step S2031, obtaining the charging current of the battery.

[0099] Specifically, the charging current of the battery is acquired through a battery sensor.

[0100] Step S2032: When the duration of the charging current being less than the preset current reaches a first preset time, the high-voltage battery pack is controlled to stop charging the storage battery.

[0101] Specifically, when the remaining power of the battery is low, the charging current of the battery is large; when the battery is about to be fully charged, the charging current of the battery decreases. When the duration of the charging current of the battery being less than the preset current reaches a first preset time, it means that the battery is fully charged. At this time, the high-voltage battery pack is controlled to stop charging the battery, so as to avoid the high-voltage battery pack charging the fully charged battery for a long time and causing damage to the battery, thereby protecting the battery and reducing the power consumption of the high-voltage battery pack, thus achieving an energy-saving effect.

[0102] It should be noted that the first preset time is less than the target charging time. When the high-voltage battery pack is controlled to charge the battery, the charging duration is the target charging time. During the charging process, if the duration of the battery charging current being less than the preset current reaches the first preset time, it means that the battery is fully charged. However, at this time, the high-voltage battery pack has not reached the target charging time. The high-voltage battery pack will continue to charge the battery, causing energy waste of the high-voltage battery pack and damage to the battery. At this time, the high-voltage battery pack will be actively controlled to stop charging the battery to avoid energy waste of the high-voltage battery pack and damage to the battery. Designers can set the specific value of the preset current according to the specific parameters of the battery to ensure the judgment of the full charge state of the battery.

[0103] Figure 4 FIG. 2 is a flow chart of a method for controlling an electric vehicle battery provided by another embodiment of the present application. Figure 4 As shown, step S203 also includes steps S2033 to S2035.

[0104] Step S2033, obtaining the temperature value of the battery body.

[0105] Specifically, the body temperature value of the battery can be acquired by a sensor connected to the battery.

[0106] Step S2034, when the temperature value is greater than or equal to the preset temperature value, control the high-voltage battery pack to charge the storage battery at a first charging voltage.

[0107] Step S2035, when the temperature value is less than the preset temperature value, the high-voltage battery pack is controlled to charge the battery with a second charging voltage, and the second charging voltage is less than the first charging voltage.

[0108] Specifically, when the temperature value is greater than or equal to the preset temperature value, it means that the temperature of the battery body is normal at this time, and the high-voltage battery pack is controlled to charge the battery with the first charging voltage (rated charging voltage). When the temperature value is less than the preset temperature value, it means that the temperature of the battery body is low at this time, and charging the battery with the rated voltage may cause damage to the battery. At this time, the high-voltage battery pack is controlled to charge the battery with the second charging voltage (less than the rated charging voltage) to protect the battery.

[0109] Figure 5 FIG. 2 is a flow chart of a method for controlling an electric vehicle battery provided by another embodiment of the present application. Figure 5 As shown, the electric vehicle battery control method further includes step S501 and step S502.

[0110] Step S501: when the duration of the battery sensor being in the dormant state reaches a first target interval, the output current of the battery is obtained.

[0111] Specifically, the output current of the battery can be acquired by a battery sensor.

[0112] Step S502, when the output current is greater than the preset current, after determining the second target interval time according to the health status and the remaining power of the charged battery, the breaker is controlled to disconnect the connection between the battery and the load.

[0113] Specifically, after the electric vehicle is powered off, the load on the electric vehicle should be in a non-working state, but the load power supply circuit on the electric vehicle may fail, causing the load to still work normally after the electric vehicle is powered off. When the output current is greater than the preset current, it means that there is a load on the electric vehicle that is still in a working state. At this time, the control breaker disconnects the connection between the battery and the load, causing the load to lose power and convert to a non-working state, reducing the energy consumption of the battery, thereby reducing the speed at which the battery power decreases, and further reducing the speed at which the battery becomes depleted.

[0114] In one embodiment of the present application, after step S502, the electric vehicle battery control method further includes step S503.

[0115] Step S503: When the duration of the breaker being in the off state reaches a second preset time, the breaker is controlled to close.

[0116] Specifically, the circuit breaker is controlled to close so that the controller and the battery sensor are powered to work, ensuring that the battery status can be monitored and charged to prevent the battery from running out of power. The second preset time is less than the second target interval time. Before the duration of the battery being in dormancy does not reach the second target interval time, the circuit breaker is controlled to close so that the battery supplies power to the controller to ensure that the controller can work, the battery parameters are detected, and the high-voltage battery pack is controlled to charge the battery according to the detected battery parameters.

[0117] Step S504: when the duration of the battery sensor being in the dormant state reaches the second target interval time, the output current of the battery is obtained again.

[0118] Step S505, when the output current is still greater than the preset current, the breaker is controlled to disconnect the battery and the load for the second time, and the breaker cannot be automatically closed after the second disconnection.

[0119] Specifically, if the output current is still greater than the preset current in step S505, it means that the first control of the breaker disconnection in step S502 cannot put the abnormal load into a dormant state. At this time, the control breaker disconnects the connection between the battery and the load for the second time. The breaker cannot be automatically closed after the second disconnection, thereby ensuring that no load consumes the battery's power and preventing the battery from being depleted. When the electric vehicle needs to be used, the breaker needs to be manually closed to enable the battery to supply power to the electric vehicle load.

[0120] It should be noted that before the breaker is controlled to be disconnected for the second time, the battery can be charged. After the battery is completely charged, the breaker is controlled to be disconnected for the second time.

[0121] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0122] Figure 6 A schematic structural diagram of an electric vehicle battery control device provided in an embodiment of the present application is shown.

[0123] See also Figure 6 As shown, the electric vehicle battery control device includes:

[0124] An acquisition module 61, configured to wake up the battery sensor when the duration of the battery sensor in the sleep state reaches a first target interval time, and acquire the current health status and current remaining power of the battery through the battery sensor; the first target interval time is the target interval time determined in the previous control period, and the time from the moment when the battery sensor is woken up to the next moment when the battery sensor is woken up is one control period;

[0125] A target charging time determination module 62, configured to determine a target charging time according to the current health status and the current remaining power;

[0126] A charging module 63, configured to control the high-voltage battery pack to charge the battery, and when the charging duration of the battery reaches the target charging time, determine a second target interval time according to the health status and remaining power of the battery after charging; the second target interval time is used as the target interval time for the next control period;

[0127] A control module 64, configured to control the battery sensor to enter the sleep state.

[0128] In an embodiment of the present application, the target charging time determination module 62 is further configured to:

[0129] When SOC A ≥SOC1, determine that the target charging time is zero;

[0130] When SOC A <SOC2 and SOH A ≥SOH1, determine that the first charging time is the target charging time;

[0131] When SOC2≤SOC A <SOC1 and SOH A ≥SOH1, determine that the second charging time is the target charging time;

[0132] When SOC2≤SOC A <SOC1 and SOH A <SOH1, determine that the third charging time is the target charging time;

[0133] When SOC A <SOC2 and SOH A <SOH1, determine that the fourth charging time is the target charging time;

[0134] Wherein, SOC A is the current remaining power, SOC1 is a first preset power, SOC2 is a second preset power, and SOH AIt is the representation parameter value of the current health status, SOH1 is the preset parameter value, the first charging time is greater than or equal to the second charging time, the second charging time is greater than the third charging time, and the third charging time is greater than or equal to the fourth charging time.

[0135] In one embodiment of the present application, the charging module 63 is further configured to:

[0136] Obtain the charging current of the storage battery;

[0137] When the duration for which the charging current is less than the preset current reaches the first preset time, control the high-voltage battery pack to stop charging the storage battery.

[0138] In one embodiment of the present application, the charging module 63 is further configured to:

[0139] Obtain the temperature value of the storage battery body;

[0140] When the temperature value is greater than or equal to the preset temperature value, control the high-voltage battery pack to charge the storage battery with the first charging voltage;

[0141] When the temperature value is less than the preset temperature value, control the high-voltage battery pack to charge the storage battery with the second charging voltage, and the second charging voltage is less than the first charging voltage.

[0142] In one embodiment of the present application, the charging module 63 is further configured to:

[0143] When SOC B ≥SOC1, determine the first interval time as the second target interval time;

[0144] When SOC2≤SOC B <SOC1 and SOH B ≥SOH1, determine the second interval time as the second target interval time;

[0145] When SOC2≤SOC B <SOC1 and SOH B <SOH1, determine the third interval time as the second target interval time;

[0146] When SOC B <SOC2 and SOH B ≥SOH1, determine the fourth interval time as the second target interval time;

[0147] When SOC B <SOC2 and SOH B <SOH1, determine the fifth interval time as the second target interval time;

[0148] Among them, SOC B is the remaining capacity of the battery after charging, SOC1 is the first preset capacity, SOC2 is the second preset capacity, SOH B is a parameter value characterizing the health status of the battery after charging, SOH1 is a preset parameter value, the first interval time is greater than the second interval time, the second interval time is greater than the third interval time, the third interval time is greater than the fourth interval time, and the fourth interval time is greater than the fifth interval time.

[0149] In one embodiment of the present application, the electric vehicle battery control device further includes:

[0150] A first output current acquisition module, configured to acquire the output current of the battery when the duration of the battery sensor being in a dormant state reaches the first target interval time;

[0151] The first disconnection module is used to control the breaker to disconnect the connection between the battery and the load when the output current is greater than a preset current and after the second target interval time is determined according to the health status and remaining power of the charged battery.

[0152] In one embodiment of the present application, the electric vehicle battery control device further includes:

[0153] A closing module, used for controlling the breaker to close when the duration of the breaker being in the open state reaches a second preset time;

[0154] A second output current acquisition module, configured to acquire the output current of the battery again when the duration of the battery sensor being in the dormant state reaches the second target interval time;

[0155] The second disconnection module is used to control the breaker to disconnect the connection between the battery and the load for the second time when the output current is still greater than the preset current; the breaker cannot be automatically closed after the second disconnection.

[0156] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0157] in addition, Figure 6 The device shown may be a software unit, a hardware unit, or a combination of software and hardware, which is built into an existing terminal device, or may be integrated into the terminal device as an independent accessory, or may exist as an independent terminal device.

[0158] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0159] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0160] An embodiment of the present application provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0161] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), an electric carrier signal, a telecommunication signal and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0162] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0163] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0164] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0165] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0166] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for controlling an electric vehicle battery, characterized in that: include: When the duration of the battery sensor in the dormant state reaches a first target interval time, the battery sensor is awakened, and the current health status and the current remaining power of the battery are obtained through the battery sensor; the first target interval time is the target interval time determined in the previous control cycle, and the time when the battery sensor is awakened to the time when the battery sensor is awakened next time is one control cycle; Determine a target charging time according to the current health status and the current remaining power; Controlling the high-voltage battery pack to charge the battery, and when the charging duration of the battery reaches the target charging time, determining a second target interval time according to the health status and remaining power of the charged battery; the second target interval time is used as the target interval time of the next control cycle; Controlling the battery sensor to enter a dormant state; When the duration of the battery sensor being in the dormant state reaches the first target interval time, obtaining the output current of the battery; When the output current is greater than the preset current, after the second target interval time is determined according to the health status and the remaining power of the charged battery, the breaker is controlled to disconnect the connection between the battery and the load; When the duration of the breaker being in the open state reaches a second preset time, controlling the breaker to close; When the duration of the battery sensor being in the dormant state reaches the second target interval time, obtaining the output current of the battery again; When the output current is still greater than the preset current, the breaker is controlled to disconnect the battery and the load for a second time, and the breaker cannot be automatically closed after being disconnected for the second time.

2. The electric vehicle battery control method according to claim 1, characterized in that: The determining the target charging time according to the current health status and the current remaining power includes: When SOC A ≥SOC1, determining the target charging time to be zero; When the state of charge (SOC) A <SOC2 and the state of health (SOH) A ≥ SOH1, determine the first charging time as the target charging time; When SOC2 ≤ SOC A <SOC1, and SOH A ≥ SOH1, determine the second charging time as the target charging time; When SOC2 ≤ SOC A <SOC1, and SOH A <SOH1, determine the third charging time as the target charging time; When the SOC A <SOC2 and the SOH A <SOH1, determine the fourth charging time as the target charging time; Among them, SOC A is the current remaining power, SOC1 is the first preset power, SOC2 is the second preset power, SOH A is the parameter value characterizing the current health status, SOH1 is the preset parameter value, the first charging time is greater than or equal to the second charging time, the second charging time is greater than the third charging time, and the third charging time is greater than or equal to the fourth charging time.

3. The electric vehicle battery control method according to claim 1, characterized in that: The controlling the high-voltage battery pack to charge the storage battery comprises: Obtaining a charging current of the battery; When the duration that the charging current is less than the preset current reaches a first preset time, the high-voltage battery pack is controlled to stop charging the storage battery.

4. The electric vehicle battery control method according to claim 3, characterized in that: The controlling the high-voltage battery pack to charge the storage battery also includes: Get the temperature value of the battery body; When the temperature value is greater than or equal to a preset temperature value, controlling the high-voltage battery pack to charge the storage battery at a first charging voltage; When the temperature value is less than the preset temperature value, the high-voltage battery pack is controlled to charge the storage battery at a second charging voltage, where the second charging voltage is less than the first charging voltage.

5. The electric vehicle battery control method according to claim 1, characterized in that: The step of determining the second target interval time according to the health status and remaining power of the charged battery includes: When SOC B ≥SOC1, determining the first interval time as the second target interval time; When SOC2 ≤ SOC B < SOC1, and SOH B ≥ SOH1, determine that the second interval time is the second target interval time; When SOC2 ≤ SOC B <SOC1, and SOH B <SOH1, determine that the third interval time is the second target interval time; When the SOC B <SOC2 and the SOH B ≥ SOH1, determine that the fourth interval time is the second target interval time; When the SOC B <SOC2 and SOH B <SOH1, determine that the fifth interval time is the second target interval time; Among them, SOC B is the remaining capacity of the battery after charging, SOC1 is the first preset capacity, SOC2 is the second preset capacity, SOH B is a parameter value characterizing the health status of the battery after charging, SOH1 is a preset parameter value, the first interval time is greater than the second interval time, the second interval time is greater than the third interval time, the third interval time is greater than the fourth interval time, and the fourth interval time is greater than the fifth interval time.

6. An electric vehicle battery control device, characterized in that: include: an acquisition module, configured to wake up the battery sensor when the duration of the battery sensor being in a dormant state reaches a first target interval time, and acquire the current health status and the current remaining power of the battery through the battery sensor; the first target interval time is the target interval time determined in the previous control cycle, and the time when the battery sensor is awakened to the time when the battery sensor is awakened next time is one control cycle; A target charging time determination module, configured to determine a target charging time according to the current health status and the current remaining power; A charging module, used for controlling the high-voltage battery pack to charge the storage battery, and when the charging duration of the storage battery reaches the target charging time, determining a second target interval time according to the health status and remaining power of the storage battery after charging; the second target interval time is used as the target interval time of the next control cycle; A control module, used for controlling the battery sensor to enter a dormant state; A first output current acquisition module, configured to acquire the output current of the battery when the duration of the battery sensor being in a dormant state reaches the first target interval time; A first disconnection module, configured to control the breaker to disconnect the connection between the battery and the load when the output current is greater than a preset current and after the second target interval time is determined according to the health status and the remaining power of the charged battery; A closing module, used for controlling the breaker to close when the duration of the breaker being in the open state reaches a second preset time; A second output current acquisition module, configured to acquire the output current of the battery again when the duration of the battery sensor being in the dormant state reaches the second target interval time; The second disconnection module is used to control the breaker to disconnect the connection between the battery and the load for the second time when the output current is still greater than the preset current; the breaker cannot be automatically closed after the second disconnection.

7. An electric vehicle battery control system, characterized in that: It includes a battery, a battery sensor, a high-voltage battery pack and a controller, the battery is electrically connected to the battery sensor and the high-voltage battery pack respectively, and the battery sensor and the high-voltage battery pack are both electrically connected to the controller; the battery sensor is used to collect the health status and remaining power of the battery, and transmit the health status and remaining power of the battery to the controller; the high-voltage battery pack is used to charge the battery according to the instructions of the controller; the controller is used to execute the method described in any one of claims 1 to 5.

8. An electric vehicle, characterized in that: Including the electric vehicle battery control system as described in claim 7.

Images