CN116409155A - Battery replenishment method, device, equipment and storage medium - Google Patents

Abstract

The present application relates to a battery replenishment method, device, equipment and storage medium, and relates to the technical field of automobiles. The method includes: when the first preset time period elapses after the vehicle is powered off, the battery detection unit of the vehicle acquires the first ambient temperature T1 and the first voltage U1 of the low-voltage battery of the vehicle; T1 and the first voltage U1, determine the state of charge SOC of the low-voltage battery through the vehicle body control unit BCM; The first preset power threshold is the SOC of the low-voltage battery corresponding to the waiting state. In this way, the low-voltage battery can be replenished to meet the long-term storage of the whole vehicle, and it is avoided to determine the SOC of the low-voltage battery through the battery sensor with high cost and many vehicles are not equipped.

Description

Battery replenishment method, device, equipment and storage medium

technical field

The invention relates to the technical field of automobiles, in particular to a storage battery replenishment method, device, equipment and storage medium.

Background technique

With the development of automobiles, the current real-time clock (RTC) module can periodically wake up the battery sensor to receive the power information (ie, state of charge) of the vehicle-mounted low-voltage battery (ie, the low-voltage battery) sent by the battery sensor, and the vehicle-mounted low-voltage battery When the power information of the vehicle is less than the preset power threshold, the on-board low-voltage battery is charged through the vehicle control system. The power battery management system can also be used to detect the voltage of the vehicle-mounted low-voltage battery to obtain the state of charge of the vehicle-mounted low-voltage battery. electricity.

However, the current battery sensor is expensive and costly, and many vehicles are not configured. Moreover, the detection accuracy of the voltage detected by the power battery management system is low, resulting in low accuracy of the obtained state of charge of the vehicle-mounted low-voltage battery.

Contents of the invention

The object of the present invention is to provide a method, device, equipment and storage medium for recharging batteries, so as to solve the technical problems of high cost of battery sensors used in the related art and low accuracy of voltage detection detected by the power battery management system. The technical scheme of the application is as follows:

According to the first aspect involved in the present application, a battery replenishment method is provided, including: acquiring the first ambient temperature of the low-voltage battery of the vehicle through the battery detection unit of the vehicle when the first preset period of time elapses after the vehicle is powered off T1 and the first voltage U1; according to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery, determine the state of charge SOC of the low-voltage battery through the body control unit BCM of the vehicle, and the power supply voltage of the low-voltage battery is lower than a preset voltage value; When it is determined that the SOC of the low-voltage battery is less than the first preset power threshold, the high-voltage battery replenishes the low-voltage battery through the DC converter DCDC, and the first preset power threshold is the SOC of the low-voltage battery corresponding to the waiting state.

According to the above-mentioned technical means, this application can determine the SOC of the low-voltage battery regularly according to the ambient temperature and voltage of the low-voltage battery after the vehicle is powered off, and when it is determined that the SOC of the low-voltage battery is less than the SOC of the state to be recharged, the low-voltage battery is checked. The power supply can meet the long-term storage of the whole vehicle without increasing the battery capacity, and avoid the problem that the remaining power of the low-voltage battery is too low after the long-term storage of the whole vehicle, which leads to the problem that the whole vehicle cannot be started. At the same time, it is avoided to determine the SOC of the low-voltage battery through the battery sensor with high cost and not configured in many vehicles.

In a possible implementation, before the high-voltage battery supplies power to the low-voltage battery through the DC converter DCDC, the method further includes: sending a power supply signal to the power control unit PCU of the vehicle through the BCM; Under normal circumstances, the power supply signal is sent to the DCDC of the vehicle through the PCU.

According to the above technical means, this application can ensure that the low-voltage battery is replenished when the high-voltage system is normal, and avoid the problem that the low-voltage battery cannot be replenished through the abnormal high-voltage system when the high-voltage system is abnormal.

In a possible implementation manner, the method further includes: when the second preset period of time elapses after the vehicle is powered off, the battery detection unit obtains the second ambient temperature T2 and the second voltage U2 of the low-voltage battery, and the second preset The duration is set to be less than the first preset duration; based on the second ambient temperature T2 and the second voltage U2 of the low-voltage battery, the static SOC of the low-voltage battery is determined through the T-U-SOC relationship corresponding curve of the low-voltage battery, and the T-U-SOC relationship corresponding curve is used for Indicates the voltage and static SOC of the low-voltage battery at different ambient temperatures T.

According to the above-mentioned technical means, after the second preset period of time after the vehicle is powered off, the vehicle is in the network dormant state, and the ambient temperature and voltage of the low-voltage battery are stable at this time. According to the ambient temperature and voltage of the low-voltage battery at this time, Determining the static SOC of the low-voltage battery improves the accuracy of the static SOC of the low-voltage battery.

In a possible implementation, according to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery, the vehicle body control unit BCM determines the SOC of the low-voltage battery, including: according to the first ambient temperature of the low-voltage battery T1 and the first voltage U1 determine the load SOC of the low-voltage battery through the T-SOC-U relationship table of the low-voltage battery. The voltage of the battery; according to the static SOC of the low-voltage battery and the load SOC, the SOC of the low-voltage battery is determined by BCM.

According to the above technical means, when the SOC of the low-voltage battery is determined through the BCM according to the ambient temperature and voltage of the low-voltage battery, it is necessary to wake up the BCM, which will generate a current for driving the BCM, thus increasing the voltage of the low-voltage battery. The ambient temperature and voltage of the low-voltage battery are determined to determine the load SOC of the low-voltage battery, and the accuracy of the load SOC of the low-voltage battery is improved.

In a possible implementation, the high-voltage system includes a high-voltage battery; when the PCU judges that the high-voltage system of the vehicle is normal, sending a supplementary power signal to the DCDC of the vehicle through the PCU includes: sending a signal to the high-voltage battery control unit of the vehicle through the PCU The BMS sends a power supply signal; according to the power supply signal, the SOC and discharge power corresponding to the high-voltage battery of the vehicle are obtained through the BMS, and the power supply voltage of the high-voltage battery is greater than or equal to the preset voltage value; when the SOC corresponding to the high-voltage battery is greater than the second preset power threshold and the discharge power corresponding to the high-voltage battery is greater than the preset discharge power, the PCU sends a supplementary power signal to the DCDC of the vehicle. The second preset power threshold is the lowest SOC of the vehicle driven by the high-voltage battery, and the preset discharge power is the high-voltage battery drive. The minimum discharge power of the vehicle.

According to the above-mentioned technical means, the present application can avoid that when the SOC corresponding to the high-voltage battery is less than or equal to the minimum SOC of the driving vehicle, and the discharge power corresponding to the high-voltage battery is less than or equal to the minimum discharge power of the driving vehicle, still using the high-voltage battery as the low-voltage battery Charging, resulting in the problem that the vehicle cannot be driven by the high-voltage battery.

In a possible implementation, the method further includes: when the high-voltage battery fails to supplement power to the low-voltage battery through DCDC, judging whether the SOC of the low-voltage battery is less than a third preset power threshold, where the third preset power threshold is the low-voltage battery Satisfy the minimum SOC for powering on the whole vehicle; when it is determined that the SOC of the low-voltage battery is less than the third preset power threshold, an alarm message is sent to the terminal device through the BCM and the battery detection unit, and the alarm message is used to remind the user that the SOC of the low-voltage battery of the vehicle is less than The third preset power threshold.

According to the above-mentioned technical means, the present application can promptly remind the user when the SOC of the low-voltage battery of the vehicle is lower than the minimum SOC that satisfies the vehicle power-on, so as to avoid the problem that the vehicle cannot be powered on and the user cannot use the vehicle.

According to the second aspect provided by the present application, a battery supplementary device is provided, including an acquisition unit, a determination unit, and a processing unit; the acquisition unit is used to pass the vehicle's The battery detection unit acquires the first ambient temperature T1 and the first voltage U1 of the low-voltage battery of the vehicle; the determination unit is used to determine the low-voltage battery temperature T1 and the first voltage U1 of the low-voltage battery through the vehicle body control unit BCM The state of charge SOC, the power supply voltage of the low-voltage battery is lower than the preset voltage value; the processing unit is used to supplement the low-voltage battery through the DC converter DCDC when the SOC of the low-voltage battery is determined to be less than the first preset power threshold. The first preset power threshold is the SOC of the low-voltage battery corresponding to the waiting state.

In a possible implementation, the battery charging device further includes a sending unit, which is used to send a charging signal to the power control unit PCU of the vehicle through the BCM; the sending unit is also used to determine the high voltage of the vehicle through the PCU When the system is normal, the power supply signal is sent to the DCDC of the vehicle through the PCU.

In a possible implementation manner, the acquisition unit is also used to acquire the second ambient temperature T2 and the second voltage U2 of the low-voltage battery through the battery detection unit when the second preset time period elapses after the vehicle is powered off. The second preset duration is less than the first preset duration; the determination unit is also used to determine the static SOC of the low-voltage battery through the T-U-SOC relationship corresponding curve of the low-voltage battery based on the second ambient temperature T2 and the second voltage U2 of the low-voltage battery, The T-U-SOC relationship corresponding curve is used to indicate the voltage and static SOC of the low-voltage battery under different ambient temperatures T.

In a possible implementation manner, the determination unit is further configured to determine the load SOC of the low-voltage battery according to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery through the T-SOC-U relationship correspondence table of the low-voltage battery, The T-SOC-U relationship correspondence table is used to indicate the voltage of the low-voltage battery under different ambient temperatures T and different load SOC; the determination unit is also used to determine the SOC of the low-voltage battery through BCM according to the static SOC of the low-voltage battery and the load SOC .

In a possible implementation manner, the high-voltage system includes a high-voltage battery; the sending unit is also used to send a supplementary power signal to the high-voltage battery control unit BMS of the vehicle through the PCU; the acquisition unit is also used to obtain the power supplement signal through the BMS The SOC and discharge power corresponding to the high-voltage battery of the vehicle, the power supply voltage of the high-voltage battery is greater than or equal to the preset voltage value; the sending unit is also used to discharge when the SOC corresponding to the high-voltage battery is greater than the second preset power threshold When the power is greater than the preset discharge power, the PCU sends a supplementary power signal to the DCDC of the vehicle. The second preset power threshold is the lowest SOC of the vehicle driven by the high-voltage battery, and the preset discharge power is the lowest discharge power of the vehicle driven by the high-voltage battery.

In a possible implementation manner, the determining unit is also used to determine whether the SOC of the low-voltage battery is less than a third preset power threshold when the high-voltage battery fails to supplement power to the low-voltage battery through DCDC, and the third preset power threshold is The low-voltage battery meets the minimum SOC for powering on the vehicle; the sending unit is also used to send an alarm message to the terminal device through the BCM and the battery detection unit when it is determined that the SOC of the low-voltage battery is less than the third preset power threshold, and the alarm message is used for prompting The SOC of the low-voltage battery of the user's vehicle is less than the third preset power threshold.

According to a third aspect provided by the present application, an electronic device is provided, including: a processor; a memory for storing processor-executable instructions; wherein, the processor is configured to execute instructions to achieve the first aspect and any of the above A method of possible implementation.

According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device can execute any one of the above-mentioned first aspect and A possible implementation method.

According to a fifth aspect provided by the present application, a vehicle is provided, including: a battery power supply device, configured to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

According to the sixth aspect provided by the present application, a computer program product is provided, the computer program product includes computer instructions, and when the computer instructions are run on the electronic device, the electronic device is made to execute the above first aspect and any possible implementation manner thereof Methods.

Thus, the above-mentioned technical features of the present application have the following beneficial effects:

(1) On the premise of not increasing the battery capacity, it can meet the long-term storage of the whole vehicle, and avoid the problem that the remaining power of the low-voltage battery is too low after the long-term storage of the whole vehicle, which will cause the problem that the whole vehicle cannot be started. At the same time, it is avoided to determine the SOC of the low-voltage battery through the battery sensor with high cost and not configured in many vehicles.

(2) It can ensure that the low-voltage battery is supplemented with electricity when the high-voltage system is normal, and avoids the problem that the low-voltage battery cannot be supplemented with electricity through the abnormal high-voltage system when the high-voltage system is abnormal.

(3) The accuracy of determining the static SOC of the low-voltage battery can be improved.

(4) The accuracy of the determined load SOC of the low-voltage battery can be improved.

(5) It can avoid charging the low-voltage battery through the high-voltage battery when the SOC corresponding to the high-voltage battery is less than or equal to the minimum SOC of the driving vehicle, and the corresponding discharge power of the high-voltage battery is less than or equal to the minimum discharge power of the driving vehicle, resulting in failure The problem of driving the vehicle through the high voltage battery.

(6) The user can be reminded in time when the SOC of the low-voltage battery of the vehicle is lower than the minimum SOC that satisfies the power-on of the vehicle, so as to avoid the problem that the vehicle cannot be powered on and the user cannot use the vehicle.

It should be noted that, for the technical effects brought about by any one of the implementations from the second aspect to the sixth aspect, refer to the technical effects brought about by the corresponding implementations in the first aspect, and details are not repeated here.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Description of drawings

The accompanying drawings here are incorporated into the specification and constitute a part of the specification, show the embodiment consistent with the application, and are used together with the specification to explain the principle of the application, and do not constitute an improper limitation of the application.

Fig. 1 is a schematic structural diagram of a battery power supply system according to an exemplary embodiment;

Fig. 2 is a flow chart of a battery replenishment method according to an exemplary embodiment;

Fig. 3 is a flow chart of yet another battery replenishment method according to an exemplary embodiment;

Fig. 4 is a flow chart of another battery replenishment method according to an exemplary embodiment;

Fig. 5 is a flow chart of yet another battery replenishment method according to an exemplary embodiment;

Fig. 6 is a flow chart of yet another battery replenishment method according to an exemplary embodiment;

Fig. 7 is a flow chart of yet another battery replenishment method according to an exemplary embodiment;

Fig. 8 is a flow chart of yet another battery replenishment method according to an exemplary embodiment;

Fig. 9 is a logic diagram of a battery replenishment system according to an exemplary embodiment;

Fig. 10 is a block diagram of a battery supplementary device according to an exemplary embodiment;

Fig. 11 is a block diagram of an electronic device according to an exemplary embodiment.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

With the development of automobile technology, the current market share of new energy vehicles is increasing. While facing many opportunities, there are also various problems and drawbacks. The configuration of new energy vehicles is more abundant than that of traditional fuel vehicles. Specifically, new energy vehicles have more functions after parking, such as fresh air system, over-the-air technology (OTA), mobile phone remote function, smart welcome Guest functions and 360 panoramic live broadcast functions lead to more electricity consumption after the vehicle is powered off than traditional fuel vehicles. In addition, new energy vehicles need to add high-voltage controllers, such as network vehicle controllers (vehicle control unit, VCU), Power control unit (power control unit, PCU) and on-board charger (on-board charger, OBC) lead to more dark current in the vehicle than traditional fuel vehicles.

When the vehicle is parked, in order to ensure the safety of the vehicle after parking, the high-voltage battery needs to be powered off. Therefore, after parking, the 12V lead-acid battery (that is, the low-voltage battery) assumes the power consumption of the function and the dark current consumption of the vehicle, resulting in the failure of the new energy vehicle. The power supply pressure of 12V lead-acid batteries is greater than that of traditional fuel vehicles. At the same time, when the vehicle is started after parking, the 12V lead-acid battery also needs to supply power to the low-voltage part of the vehicle. In order to ensure the reliability of vehicle startup, the capacity of the 12V lead-acid battery needs to be larger than that of traditional fuel vehicles, but Based on the cost and weight of the 12V lead-acid battery, the capacity of the 12V lead-acid battery cannot be increased indefinitely. Therefore, it is necessary to meet the long-term storage of the whole vehicle under the premise of no or little increase in the capacity of the 12V lead-acid battery.

At present, the battery sensor can be woken up regularly through the RTC module, and the battery sensor can receive the power information of the low-voltage battery on the vehicle. When the power information of the low-voltage battery on the vehicle is less than the preset power threshold, the low-voltage battery on the vehicle can be charged through the vehicle control system. The power battery management system can also be used to detect the voltage of the vehicle-mounted low-voltage battery to obtain the state of charge of the vehicle-mounted low-voltage battery. electricity. However, the current battery sensor is expensive and costly, and many vehicles are not configured. Moreover, the detection accuracy of the voltage detected by the power battery management system is low, resulting in low accuracy of the obtained state of charge of the vehicle-mounted low-voltage battery.

For ease of understanding, the battery replenishment method provided by the present application will be specifically introduced below in conjunction with the accompanying drawings.

A battery replenishment method provided in an embodiment of the present application may be applicable to a battery replenishment system. Fig. 1 is a schematic structural diagram of a power supply system for a storage battery according to an exemplary embodiment. As shown in FIG. 1 , the battery power supply system 10 includes: a battery detection unit 11 , a low-voltage battery 12 , a vehicle body control unit 13 , a power control unit 14 , a DC converter 15 , a high-voltage battery control unit 16 , a high-voltage battery 17 and terminal equipment 18 .

Among them, the battery detection unit 11 is used to obtain the first ambient temperature T1 and the first voltage U1 of the low-voltage battery 12 of the vehicle when the first preset time period has elapsed after the vehicle is powered off, and after the second preset time period after the vehicle is powered off. Acquire the second ambient temperature T2 and the second voltage U2 of the low-voltage storage battery 12 of the vehicle during the preset duration and send an alarm message to the terminal device 18; the low-voltage storage battery 12 is used to send the first ambient temperature T1 and the first voltage U1 to the battery detection unit 11 , the second ambient temperature T2 and the second voltage U2.

The vehicle body control unit (body control module, BCM) 13 is used for obtaining the first ambient temperature T1 and the first voltage U1 of the low-voltage storage battery 12 of the vehicle through the battery detection unit 11 of the vehicle, according to the first ambient temperature T1 and the first voltage U1 of the low-voltage storage battery 12. A voltage U1 determines the state of charge SOC of the low-voltage battery 12, sends a supplementary power signal to the DC converter 15 of the vehicle through the power control unit 14, and supplements power to the low-voltage battery 12 through the DC converter (direct current, DCDC) 15, through The power control unit 14 sends a supplementary power signal to the high-voltage battery control unit (battery management system, BMS) 16 of the vehicle, judges whether there is a fault in the high-voltage electrical equipment through the power control unit 14, and sends an alarm message to the terminal device 18 through the battery detection unit 11 .

The power control unit 14 is used to judge that the high-voltage system of the vehicle is normal, send a supplementary power signal to the DC converter 15 of the vehicle, send a supplementary power signal to the high-voltage battery control unit 16 of the vehicle, and obtain the high-voltage battery 17 of the vehicle through the high-voltage battery control unit 16 Corresponding SOC and discharge power, judging whether there is a fault in the high-voltage electrical equipment; the DC converter 15 is used to supplement the low-voltage battery 12; the high-voltage battery control unit 16 is used to obtain the SOC and discharge power corresponding to the high-voltage battery 17 of the vehicle; The high-voltage battery 17 is used to send SOC and discharge power to the power control unit 14 through the high-voltage battery control unit 16 .

The terminal device 18 is used to receive the alarm information from the battery detection unit 11 and display and remind, to realize the alarm information through the battery sensor 11, the low-voltage battery 12, the vehicle body control unit 13, the power control unit 14, the DC converter 15, and the high-voltage battery control unit 16. , the high-voltage battery 17 and the terminal equipment 18 supplement the low-voltage battery.

Fig. 2 is a flow chart of a battery replenishment method according to an exemplary embodiment. As shown in Fig. 2, the battery replenishment method includes the following steps:

S201. When the first preset period of time elapses after the vehicle is powered off, the first ambient temperature T1 and the first voltage U1 of the low-voltage battery of the vehicle are obtained through the battery detection unit of the vehicle.

Optionally, the battery detection unit can monitor the first ambient temperature T1 and the first voltage U1 of the low-voltage battery of the vehicle in real time, and the BCM of the vehicle can wake up automatically after the first preset period of time after the vehicle is powered off, and the battery The controller area network bus (controller area network, CAN) of the detection unit sends the first ambient temperature T1 and the first voltage U1 of the low-voltage storage battery to the BCM at this time. The battery detection unit may be a vehicle entertainment unit THU.

Exemplarily, the first preset duration may be any reasonable duration such as 12h, 24h, 48h.

S202. According to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery, determine the SOC of the low-voltage battery through the BCM of the vehicle.

Wherein, the supply voltage of the low-voltage storage battery is lower than the preset voltage value.

S203. When it is determined that the SOC of the low-voltage storage battery is less than a first preset power threshold.

S204. The high-voltage battery supplies power to the low-voltage battery through DCDC.

Wherein, the first preset power threshold (ie SOC1) is the SOC corresponding to the low-voltage storage battery in the waiting state.

Fig. 3 is a flow chart of another battery replenishment method according to an exemplary embodiment. As shown in Fig. 3 , before the method of "the high-voltage battery supplements the low-voltage battery through DCDC" in step S204 above, further Include the following steps:

S301. Send a power supply signal to the power control unit PCU of the vehicle through the BCM.

Optionally, the power supply signal can be generated through the BCM, and the power supply signal can be sent to the PCU of the vehicle through the BCM.

S302. When the PCU determines that the high-voltage system of the vehicle is normal, send a supplementary power signal to the DCDC of the vehicle through the PCU.

Fig. 4 is a flow chart of another battery replenishment method according to an exemplary embodiment. As shown in Fig. 4, the battery replenishment method further includes the following steps:

S401. Obtain the second ambient temperature T2 and the second voltage U2 of the low-voltage battery through the battery detection unit when the second preset time period elapses after the vehicle is powered off.

Wherein, the second preset duration is shorter than the first preset duration.

Exemplarily, the second preset duration may be any reasonable value such as 3h, 4h, 5h.

S402. Based on the second ambient temperature T2 and the second voltage U2 of the low-voltage battery, determine the static SOC of the low-voltage battery through the T-U-SOC relationship corresponding curve of the low-voltage battery.

Wherein, the T-U-SOC relationship corresponding curve is used to indicate the voltage and static SOC of the low-voltage battery under different ambient temperatures T.

Optionally, the vehicle's low-voltage battery can be tested in combination at different preset ambient temperatures T to obtain the static SOC curve and the voltage U curve of the low-voltage battery, and based on different ambient temperature T, static SOC curves and voltage The curve of U forms the corresponding curve of the T-U-SOC relationship of the low-voltage battery. The T-U-SOC relationship corresponding curve can be integrated in the BCM.

Exemplarily, the preset different ambient temperatures T may be -30°C, 25°C, and 75°C.

Fig. 5 is a flow chart of yet another battery replenishment method shown according to an exemplary embodiment. As shown in Fig. 5, the method in the above step S202 specifically includes the following steps:

S501. According to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery, determine the load SOC of the low-voltage battery through the T-SOC-U relationship correspondence table of the low-voltage battery.

Wherein, the T-SOC-U relationship correspondence table is used to indicate the voltage of the low-voltage battery under different ambient temperatures T and different load SOCs.

Optionally, the current I of the whole vehicle can be collected in advance when the BCM wakes up by itself, and then the low-voltage battery of the vehicle is tested on the battery charging and discharging machine at different preset ambient temperatures T and different load SOCs through the current I. , get the voltage U of the low-voltage battery within a preset time period, and form a T-SOC-U relationship table based on different ambient temperatures T, different load SOCs and the voltage U of the low-voltage battery within a preset time period. The T-SOC-U relationship correspondence table can be integrated in the BCM. The first voltage U1 of the low-voltage battery is the voltage of the low-voltage battery within a preset time period.

Exemplarily, the preset different ambient temperatures T can be -30°C, 25°C, 75°C, and the preset different load SOC can be 10%, 20%, 30%, 40%, 50%, 60%, 70% %, 80%, 90%, 100%, the preset time period can be any reasonable value such as 8ms, 10ms, 12ms, etc.

S502. Determine the SOC of the low-voltage battery through the BCM according to the static SOC of the low-voltage battery and the load SOC.

Optionally, the SOC of the low-voltage battery may be (static SOC+load SOC)/2.

Fig. 6 is a flow chart of another battery replenishment method according to an exemplary embodiment. The high-voltage system includes a high-voltage battery. As shown in Fig. 6, the method in the above step S302 specifically includes the following steps:

S601. Send a power supply signal to the BMS of the vehicle through the PCU.

S602. Obtain the SOC and discharge power corresponding to the high-voltage battery of the vehicle through the BMS according to the power supply signal.

Wherein, the power supply voltage of the high-voltage storage battery is greater than or equal to a preset voltage value.

S603. When the SOC corresponding to the high-voltage battery is greater than the second preset power threshold and the discharge power corresponding to the high-voltage battery is greater than the preset discharge power, send a supplementary power signal to the DCDC of the vehicle through the PCU.

Wherein, the second preset power threshold is the lowest SOC of the vehicle driven by the high-voltage battery, and the preset discharge power is the lowest discharge power of the vehicle driven by the high-voltage battery.

Fig. 7 is a flow chart of another battery replenishment method shown according to an exemplary embodiment. The high-voltage system also includes high-voltage electrical equipment. As shown in Fig. 7, the method in the above step S302 specifically includes the following steps:

S701. Using the PCU to determine whether there is a fault in the high-voltage electrical equipment.

S702. When it is determined that there is no fault in the high-voltage electrical equipment, send a supplementary power signal to the DCDC of the vehicle.

Optionally, the DCDC can charge the low-voltage battery according to a specific voltage and preset charging time, and stop charging when the SOC of the low-voltage battery is greater than the fourth preset power threshold, and the vehicle network enters sleep mode.

Exemplarily, the fourth preset power threshold may be a reasonable value such as 90%, 95%.

According to the above technical means, this application can ensure that the low-voltage battery is replenished when the high-voltage electrical equipment is faultless, and avoid the problem that the low-voltage battery cannot be supplemented by the faulty high-voltage electrical equipment when the high-voltage electrical equipment fails .

Fig. 8 is a flow chart of another battery replenishment method according to an exemplary embodiment. The high-voltage system also includes high-voltage electrical equipment. As shown in Fig. 8, the battery replenishment method further includes the following steps:

S801. When the high-voltage battery fails to supplement power to the low-voltage battery through DCDC, determine whether the SOC of the low-voltage battery is less than a third preset power threshold.

Wherein, the third preset power threshold is the lowest SOC for the low-voltage battery to meet the power-on of the whole vehicle.

S802. When it is determined that the SOC of the low-voltage storage battery is less than the third preset power threshold, send alarm information to the terminal device through the BCM and the battery detection unit.

Wherein, the alarm information is used to remind the user that the SOC of the low-voltage battery of the vehicle is less than the third preset power threshold (ie SOC2).

Optionally, the terminal device may be a handheld terminal.

Fig. 9 is a logic diagram of a battery replenishment system according to an exemplary embodiment. As shown in Fig. 9, after the vehicle is powered off x h, the body control unit wakes up the network to determine the SOC of the 12V lead-acid battery, and The SOC of the 12V lead-acid battery is compared with SOC1 to determine whether the SOC of the 12V lead-acid battery is less than SOC1. When it is determined that the SOC of the 12V lead-acid battery is not less than SOC1, the next step is not performed; when it is determined that the SOC of the 12V lead-acid battery is less than SOC1, the power supply signal is sent to the power control unit through the body control unit. Use the power control unit to judge whether the high-voltage system is normal. If the high-voltage system is not normal, do not proceed to the next step; The acid battery is recharged, and it is judged whether the 12V lead-acid battery is successfully recharged. If the recharge is successful, the vehicle network will enter dormancy after the recharge is completed; if the recharge fails, it is judged whether the SOC of the 12V lead-acid battery is less than SOC2. If the SOC of the 12V lead-acid battery is not less than SOC2, do not proceed to the next step; if the SOC of the 12V lead-acid battery is less than SOC2, send an alarm message to the battery detection unit through the BCM, and forward the alarm message to the terminal device through the battery detection unit, After the alarm message is sent, the vehicle network goes into sleep mode.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, the storage battery supplementary device or the electronic equipment includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application can exemplarily divide the functional modules of the storage battery power supply device or electronic equipment according to the above method. One or more functions are integrated in one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

Fig. 10 is a block diagram of a device for supplementing batteries according to an exemplary embodiment. Referring to FIG. 10 , the battery supplementary device 70 includes: an acquisition unit 701 , a determination unit 702 and a processing unit 703 ;

The acquiring unit 701 is configured to acquire the first ambient temperature T1 and the first voltage U1 of the low-voltage battery of the vehicle through the battery detection unit of the vehicle when the first preset time period has elapsed after the vehicle is powered off;

The determining unit 702 is configured to determine the state of charge SOC of the low-voltage battery through the body control unit BCM of the vehicle according to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery, and the power supply voltage of the low-voltage battery is lower than a preset voltage value;

The processing unit 703 is configured to, when it is determined that the SOC of the low-voltage battery is less than a first preset power threshold, the high-voltage battery supplements the low-voltage battery through a DC converter DCDC, and the first preset power threshold is the waiting state corresponding to the low-voltage battery the SOC.

In a possible implementation manner, the battery supplementary device 70 further includes a sending unit 704, which is used to send a supplementary power signal to the power control unit PCU of the vehicle through the BCM; the sending unit 704 is also used to When it is judged that the high-voltage system of the vehicle is normal, the power supply signal is sent to the DCDC of the vehicle through the PCU.

In a possible implementation manner, the acquiring unit 701 is also configured to acquire the second ambient temperature T2 and the second voltage U2 of the low-voltage battery through the battery detection unit when the second preset time period elapses after the vehicle is powered off, The second preset duration is less than the first preset duration; the determination unit 702 is also used to determine the static state of the low-voltage battery through the T-U-SOC relationship corresponding curve of the low-voltage battery based on the second ambient temperature T2 and the second voltage U2 of the low-voltage battery SOC, T-U-SOC relationship corresponding curve is used to indicate the voltage and static SOC of the low-voltage battery under different ambient temperatures T.

In a possible implementation manner, the determination unit 702 is further configured to determine the load SOC of the low-voltage battery through the T-SOC-U relationship correspondence table of the low-voltage battery according to the first ambient temperature T1 and the first voltage U1 of the low-voltage battery , the T-SOC-U relationship table is used to indicate the voltage of the low-voltage battery under different ambient temperatures T and different load SOC; the determination unit 702 is also used to determine the low-voltage battery through BCM according to the static SOC and load SOC of the low-voltage battery the SOC.

In a possible implementation manner, the high-voltage system includes a high-voltage battery; the sending unit 704 is also used to send a supplementary power signal to the high-voltage battery control unit BMS of the vehicle through the PCU; The BMS obtains the SOC and discharge power corresponding to the high-voltage battery of the vehicle, and the power supply voltage of the high-voltage battery is greater than or equal to a preset voltage value; When the corresponding discharge power is greater than the preset discharge power, the PCU sends a supplementary power signal to the DCDC of the vehicle, the second preset power threshold is the lowest SOC of the vehicle driven by the high-voltage battery, and the preset discharge power is the minimum discharge power of the vehicle driven by the high-voltage battery .

In a possible implementation manner, the determination unit 702 is also used to determine whether the SOC of the low-voltage battery is less than a third preset power threshold when the high-voltage battery fails to supplement power to the low-voltage battery through DCDC, and the third preset power threshold is The low-voltage battery meets the minimum SOC for powering on the vehicle; the sending unit 704 is also used to send alarm information to the terminal equipment through the BCM and the battery detection unit when it is determined that the SOC of the low-voltage battery is less than the third preset power threshold, and the alarm information is used The purpose is to prompt the user that the SOC of the low-voltage battery of the vehicle is less than the third preset power threshold.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Fig. 11 is a block diagram of an electronic device according to an exemplary embodiment. As shown in FIG. 11 , the electronic device 80 includes, but is not limited to: a processor 801 and a memory 802 .

Wherein, the above-mentioned memory 802 is used for storing executable instructions of the above-mentioned processor 801 . It can be understood that the above processor 801 is configured to execute instructions, so as to implement the battery replenishment method in the above embodiment.

It should be noted that those skilled in the art can understand that the structure of the electronic device shown in Figure 11 does not constitute a limitation on the electronic device, and the electronic device may include more or less components than those shown in Figure 11, or combine certain some components, or a different arrangement of components.

The processor 801 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and/or modules stored in the memory 802, and calling data stored in the memory 802 , to perform various functions of the electronic equipment and process data, so as to monitor the electronic equipment as a whole. Processor 801 may include one or more processing units. Optionally, the processor 801 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 801 .

The memory 802 can be used to store software programs as well as various data. The memory 802 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program (such as a determination unit, a processing unit, etc.) required by at least one functional module, and the like. In addition, the memory 802 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as a memory 802 including instructions, and the above instructions can be executed by the processor 801 of the electronic device 800 to implement the battery replenishment method in the above-mentioned embodiments .

In actual implementation, the functions of the acquiring unit 701, the determining unit 702, the processing unit 703, and the sending unit 704 in FIG. 10 can all be implemented by the processor 801 in FIG. For the specific execution process, reference may be made to the description of the battery replenishment method in the above embodiment, which will not be repeated here.

Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be a read-only memory (read-only memory, ROM), a random access memory (random access memory, RAM), CD-ROM, magnetic tape, floppy disk and optical data storage devices, etc.

In an exemplary embodiment, a vehicle including a battery replenishment device is also provided, and the vehicle can complete the battery replenishment method in the above-mentioned embodiments through the battery replenishment device.

In an exemplary embodiment, the embodiment of the present application further provides a computer program product including one or more instructions, the one or more instructions can be executed by the processor 801 of the electronic device to complete the storage battery in the above embodiment Replenishment method.

It should be noted that, when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned embodiment of the battery replenishment method can be realized, and can achieve the same as the above-mentioned The same technical effect as the battery replenishment method will not be repeated here to avoid repetition.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or It may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the classification units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If an integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or the whole classification part or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a The storage medium includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above are only specific implementation methods of this application, but the protection scope of this application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application shall be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. A method of battery recharging comprising:

when a first preset time period passes after the whole vehicle is powered down, acquiring a first ambient temperature T1 and a first voltage U1 of a low-voltage storage battery of the vehicle through a battery detection unit of the vehicle;

determining a state of charge (SOC) of the low-voltage storage battery through a body control unit (BCM) of the vehicle according to a first ambient temperature (T1) and a first voltage (U1) of the low-voltage storage battery, wherein the power supply voltage of the low-voltage storage battery is lower than a preset voltage value;

and when the SOC of the low-voltage storage battery is determined to be smaller than a first preset electric quantity threshold value, the high-voltage storage battery supplements the low-voltage storage battery through a direct current converter DCDC, and the first preset electric quantity threshold value is the SOC of the low-voltage storage battery corresponding to the state to be supplemented.

2. The method of claim 1, wherein prior to recharging the low voltage battery by the high voltage battery through the dc converter DCDC, the method further comprises:

Transmitting a supplementary electrical signal to a power control unit PCU of the vehicle through the BCM;

and when the PCU judges that the high-voltage system of the vehicle is normal, the electric compensation signal is sent to the DCDC of the vehicle through the PCU.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

when a second preset time period passes after the whole vehicle is powered down, acquiring a second environment temperature T2 and a second voltage U2 of the low-voltage storage battery through the battery detection unit, wherein the second preset time period is smaller than the first preset time period;

and determining the static state SOC of the low-voltage storage battery through a T-U-SOC relation corresponding curve of the low-voltage storage battery based on the second ambient temperature T2 and the second voltage U2 of the low-voltage storage battery, wherein the T-U-SOC relation corresponding curve is used for indicating the voltage and the static state SOC of the low-voltage storage battery at different ambient temperatures T.

4. A method according to claim 3, characterized in that said determining, by means of the body control unit BCM of the vehicle, the state of charge SOC of the low-voltage battery as a function of the first ambient temperature T1 and of the first voltage U1 of the low-voltage battery, comprises:

according to a first ambient temperature T1 and a first voltage U1 of the low-voltage storage battery, determining a load SOC of the low-voltage storage battery through a T-SOC-U relation corresponding table of the low-voltage storage battery, wherein the T-SOC-U relation corresponding table is used for indicating voltages of the low-voltage storage battery under different ambient temperatures T and different load SOCs;

And determining the SOC of the low-voltage storage battery through the BCM according to the static SOC and the load SOC of the low-voltage storage battery.

5. The method of claim 2, wherein the high voltage system comprises the high voltage battery;

the sending, by the PCU, the electrical compensation signal to the DCDC of the vehicle when the PCU determines that the high voltage system of the vehicle is normal, includes:

transmitting the supplementary electrical signal to a high-voltage battery control unit BMS of the vehicle through the PCU;

according to the electric supplementing signal, acquiring the SOC and the discharge power corresponding to a high-voltage storage battery of the vehicle through the BMS, wherein the power supply voltage of the high-voltage storage battery is greater than or equal to the preset voltage value;

and when the SOC corresponding to the high-voltage storage battery is larger than a second preset electric quantity threshold value and the discharge power corresponding to the high-voltage storage battery is larger than a preset discharge power, the electric compensation signal is sent to the DCDC of the vehicle through the PCU, the second preset electric quantity threshold value is the lowest SOC of the high-voltage storage battery driven vehicle, and the preset discharge power is the lowest discharge power of the high-voltage storage battery driven vehicle.

6. The method according to claim 1, wherein the method further comprises:

When the high-voltage storage battery fails to supplement electricity to the low-voltage storage battery through the DCDC, judging whether the SOC of the low-voltage storage battery is smaller than a third preset electric quantity threshold value, wherein the third preset electric quantity threshold value is the lowest SOC of the low-voltage storage battery which meets the whole vehicle power-on requirement;

and when the SOC of the low-voltage storage battery is determined to be smaller than the third preset electric quantity threshold value, sending alarm information to a terminal device through the BCM and the battery detection unit, wherein the alarm information is used for prompting a user that the SOC of the low-voltage storage battery of the vehicle is smaller than the third preset electric quantity threshold value.

7. The storage battery power supplementing device is characterized by comprising an acquisition unit, a determination unit and a processing unit;

the acquisition unit is used for acquiring a first ambient temperature T1 and a first voltage U1 of a low-voltage storage battery of the vehicle through a battery detection unit of the vehicle when a first preset time period passes after the whole vehicle is powered down;

the determining unit is configured to determine, according to a first ambient temperature T1 and a first voltage U1 of the low-voltage battery, a state of charge SOC of the low-voltage battery through a body control unit BCM of the vehicle, where a supply voltage of the low-voltage battery is lower than a preset voltage value;

And the processing unit is used for supplementing electricity to the low-voltage storage battery through the DC converter DCDC when the SOC of the low-voltage storage battery is determined to be smaller than a first preset electric quantity threshold, wherein the first preset electric quantity threshold is the SOC of the low-voltage storage battery corresponding to the state to be supplemented.

8. An electronic device, comprising: a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to execute the instructions to implement the method of any one of claims 1 to 6.

9. A computer readable storage medium, characterized in that, when computer-executable instructions stored in the computer readable storage medium are executed by a processor of an electronic device, the electronic device is capable of performing the method of any one of claims 1 to 6.

10. A vehicle comprising a battery recharging device according to claim 7, the vehicle being adapted to implement the method according to any of claims 1 to 6.

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