A new energy vehicle battery charging method and system

Abstract

The present invention provides a method and system for replenishing the battery of a new energy vehicle, including: respectively setting a first power-deficit threshold and a second power-deficit threshold for a battery and a power battery; judging whether the battery meets the first power-deficit threshold, if not, obtaining a first replenishment amount that the power battery can replenish for the battery by using the state information of the power battery and the second power-deficit threshold, generating a second replenishment amount by using the power consumption of the charged on-board electrical appliances, and selecting a replenishment value and a replenishment method of the power battery to the battery based on the first replenishment amount and the second replenishment amount to obtain a third replenishment mode. According to the present invention, by respectively executing the first replenishment mode, the second replenishment mode and the third replenishment mode, the power battery and the battery can be replenished when they are depleted, and the third replenishment mode can be used to more appropriately select the replenishment value and the replenishment method of the power battery to the battery, taking into account both the safety of the power battery and the consumption of the charged on-board electrical appliances.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a method and system for charging a battery of a new energy vehicle. Background Art

[0002] With the development of industrialization, new energy accounts for an increasingly larger proportion in society. Compared with traditional oil vehicles, it brings more convenience to social life while saving energy and reducing emissions.

[0003] In new energy vehicles, the role of the power battery is to receive and store high-voltage direct current provided by the on-board charger, generator, brake energy recovery device or external charging device, and provide high-voltage direct current for electric vehicles. The power battery is mainly used as a starting battery for starting the car engine; and the role of the new energy vehicle battery in the whole vehicle is to power multiple components on the vehicle. In order to ensure the power of the battery and not to lose it, under normal circumstances, the power battery of the new energy vehicle is used to replenish the battery to prevent the loss of the battery. However, the functions of existing new energy vehicles are becoming more and more diversified, and various functional on-board electrical appliances are also increasing. When the power battery replenishes the battery, the influence of the switch state of the on-board electrical appliances on it is not considered. At the same time, the nuclear power state of the power battery is not considered, which will affect the normal use of the power battery and cause the loss of the power battery for a long time. Therefore, the present invention studies and designs a new energy vehicle battery replenishment method and system. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the recharging of new energy batteries easily causes power battery loss, thereby providing a new energy vehicle battery recharging method.

[0005] In order to solve the above problems, the present invention provides a method for replenishing power of a battery of a new energy vehicle, which comprises:

[0006] Provide a programmable controller, connect the programmable controller to the battery management system of the new energy vehicle battery, and connect the programmable controller to the processor in the battery management system through a serial port;

[0007] The programmable controller obtains the battery management control logic component in the processor, and strips the charging control logic from the battery management control logic component, leads the charging control logic to the programmable controller, and enables the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and stores the scheme in the processor battery management control logic component through the serial port to form the battery charging control logic;

[0008] At the same time, the first power-deficient threshold and the second power-deficient threshold of the storage battery and the power battery are set respectively by the programmable controller, and the vehicle VCU controller is awakened to obtain the status information of the storage battery and the power battery respectively;

[0009] Determine whether the storage battery meets the first power-deficient threshold, and if so, continue to determine whether the power battery meets the second power-deficient threshold, and if the power battery meets the second power-deficient threshold, use an external charging device to recharge the power battery to obtain a first recharging mode;

[0010] or, if the power battery does not meet the second power-deficient threshold, the power battery is used to supplement the storage battery until the storage battery does not meet the first power-deficient threshold, so as to obtain a second supplementary power mode;

[0011] If not, the first charging amount that the power battery can charge the storage battery with is obtained by using the status information of the power battery and the second power-deficient threshold, and the number of charged onboard electrical appliances is obtained to obtain the power consumption of the charged onboard electrical appliances, and the second charging amount is used to generate the second charging amount, and the charging value and charging method of the power battery to the storage battery are selected based on the first charging amount and the second charging amount to obtain the third charging mode;

[0012] After selecting the first charging mode, the second charging mode or the third charging mode, it is determined whether the vehicle status information meets the preset conditions to select whether to perform charging of the power battery or the storage battery and select the charging mode.

[0013] Preferably, the method of obtaining the number of charged onboard electrical appliances is:

[0014] The number of currently charged on-board electrical appliances in operation is collected to obtain the power consumption of the current charged on-board electrical appliances within a certain period of time, and the second replenishment power of the charged on-board electrical appliances corresponding to the number and power consumption is obtained based on historical data.

[0015] Preferably, the selection of the amount of power battery to replenish the storage battery and the replenishment method based on the first replenishment amount and the second replenishment amount is:

[0016] Determine whether the first replenishment amount is greater than or equal to the second replenishment amount. If so, use the power battery to fully replenish the storage battery, and use the second replenishment amount as its replenishment value;

[0017] If not, the power battery is used to supplement the battery power, and the first supplementary power amount is used as the supplementary power value.

[0018] Preferably, the determining whether the power battery meets the second power-deficient threshold further includes:

[0019] Obtain the status information of the power battery, the last charging time of the power battery or the current system time. If the time difference between the current system time and the last charging time is greater than 24 hours or the current system time is during the low peak time of the power grid at night, use an external charging device to recharge the power battery.

[0020] Preferably, the battery status information includes historical deviation data of the battery's nuclear power status, the initial charging temperature and charging time of the battery's last charge, and the current nuclear power status power value, current temperature, and current charging time of the battery;

[0021] The power battery information includes: the initial charging temperature and charging time of the power battery when it was last charged, the historical deviation data of the power battery's nuclear power state, and the current power value of the power battery's nuclear power state, current temperature, and current charging time.

[0022] Preferably, the vehicle status information includes: vehicle defense status, ignition switch status, hood and door status, and vehicle component status.

[0023] Preferably, the determination of whether the vehicle status information meets the preset conditions is:

[0024] Determining whether the vehicle defense state is in a closed state;

[0025] If yes, determining whether the ignition switch state is off;

[0026] If yes, determining whether the hood and the door are in a closed state;

[0027] If so, determine whether the vehicle component status is in a normal state;

[0028] If yes, start charging.

[0029] Preferably, the selected charging mode is:

[0030] Respectively obtaining the current temperature and current charging time of the power battery and the storage battery; and the initial charging temperature and charging time of the power battery and the storage battery when they were last charged, so as to obtain the charging difference time and charging difference temperature of the power battery and the storage battery;

[0031] Determine whether the charging temperature difference between the power battery and the storage battery is less than 20°C;

[0032] If yes, determine whether the charging difference time of the power battery and the storage battery is greater than 6 hours;

[0033] If so, the charging mode of the power battery for the storage battery is fast charging; otherwise, the charging mode of the power battery for the storage battery is slow charging.

[0034] The present invention also provides a new energy vehicle battery charging system, which adopts the new energy vehicle battery charging method described in any of the preceding items, comprising:

[0035] A control module, used to wake up the vehicle VCU controller to control the issuance of a request for replenishing power to the storage battery or the power battery, the control module also includes a read-write submodule and a storage submodule, the read-write submodule is used to write a first power-deficient threshold and a second power-deficient threshold, and the storage submodule is configured into a plurality of sub-storage areas to store system data;

[0036] The acquisition module is used to collect system time, charging temperature and status information of storage batteries and power batteries, the number of onboard electrical appliances with power and power consumption, and then convert them into digital signals and store them in the control module;

[0037] Processing modules, including:

[0038] The first processing submodule is used to obtain the status information of the storage battery and the power battery, and determine whether the status information of the storage battery and the power battery respectively meets the first power-deficient threshold and the second power-deficient threshold, and determine whether the first power-replenishing threshold is greater than or equal to the second power-replenishing threshold;

[0039] The second processing submodule is used to obtain the current vehicle status information and determine whether the vehicle status information meets the preset conditions;

[0040] The third processing submodule is used to obtain the status information of the storage battery and the power battery respectively, and to determine the charging mode of the power battery to the storage battery and the storage battery to the power battery respectively;

[0041] A DC-DC conversion module, wherein the DC-DC conversion module is connected to the storage battery and the power battery respectively to realize high-low voltage conversion between the power battery and the storage battery;

[0042] A charging module, used for charging in a determined fast charging mode or slow charging mode;

[0043] A programmable controller, wherein the programmable controller is connected to a battery management system of a new energy vehicle battery, and the programmable controller is connected to a processor in the battery management system through a serial port; the programmable controller is used to obtain a battery management control logic component in the processor, and to strip off a charging control logic from the battery management control logic component, and to lead the charging control logic to the programmable controller, and to enable the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and to store the scheme in the processor battery management control logic component through a serial port to form a battery charging control logic.

[0044] Preferably, the vehicle VCU controller is the core of the vehicle control system, and the vehicle VCU controller is also connected to a BCM module, a BMS battery module, and a wireless communication module, wherein the BCM module is used to control the status of various components on the vehicle; the BMS battery module respectively obtains the status information and temperature parameters of the storage battery and the power battery; and the wireless communication module provides a remote communication connection for the vehicle.

[0045] The invention provides a method and system for charging a battery of a new energy vehicle, which has the following beneficial effects:

[0046] 1. In the present invention, based on the obtained calibrated second replenishment amount and the first replenishment amount, the replenishment value and replenishment method of the power battery to the storage battery are selected to obtain the third replenishment mode. Based on the third replenishment mode, it is judged whether the vehicle status information meets the preset conditions to select whether to perform the power battery to replenish the storage battery. In this state, when the storage battery does not meet the replenishment conditions, the first replenishment amount that the current power battery can replenish for the storage battery and the second replenishment amount required by the charged on-board electrical appliances are considered. Under the consideration of the influence of the state of the charged on-board electrical appliances on the replenishment of the storage battery, the prevention of the loss of the power battery is considered, so that by respectively executing the first replenishment mode, the second replenishment mode and the third replenishment mode, the power battery and the storage battery can be replenished when the loss occurs. At the same time, in the process of the power battery replenishing the storage battery, the third replenishment mode can be used to more appropriately select the replenishment value and replenishment method of the power battery to the storage battery, taking into account the safety of the power battery and the consumption of the charged on-board electrical appliances;

[0047] 2. The present invention also obtains the current charging time, processes it with the status information of the storage battery and the power battery, and obtains the charging difference temperature and charging difference time of the storage battery and the power battery respectively. According to the corresponding charging mode obtained during the power replenishment process, fast charging or slow charging is selected, and the charging module is used to perform the charging mode of the power battery to the storage battery, so that the corresponding charging mode is obtained according to the current actual situation of the vehicle, and the efficiency is maximized while ensuring the stability and safety of charging;

[0048] 3. The present invention is also connected to a BCM module, a DC-DC conversion module, and a BMS battery module through the vehicle VCU controller. During the charging process, the status information of the battery and the power battery is obtained in real time, and real-time judgment is made to update the current charging, thereby achieving two-way protection for the battery and the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the process of the new energy vehicle battery charging method of the present invention;

[0050] Figure 2 It is a flow chart of the vehicle status information determination method of the present invention;

[0051] Figure 3 It is a schematic diagram of the charging mode determination process of the present invention. DETAILED DESCRIPTION

[0052] like Figure 1-3 As shown, the present invention provides a method for replenishing power of a battery of a new energy vehicle, which comprises:

[0053] Provide a programmable controller, connect the programmable controller to the battery management system of the new energy vehicle battery, and connect the programmable controller to the processor in the battery management system through a serial port;

[0054] The programmable controller obtains the battery management control logic component in the processor, and strips the charging control logic from the battery management control logic component, leads the charging control logic to the programmable controller, and enables the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and stores the scheme in the processor battery management control logic component through the serial port to form the battery charging control logic;

[0055] At the same time, the first power-deficient threshold and the second power-deficient threshold of the storage battery and the power battery are set respectively by the programmable controller, and the vehicle VCU controller is awakened to obtain the status information of the storage battery and the power battery respectively;

[0056] Determine whether the storage battery meets the first power-deficient threshold, and if so, continue to determine whether the power battery meets the second power-deficient threshold, and if the power battery meets the second power-deficient threshold, use an external charging device to recharge the power battery to obtain a first recharging mode;

[0057] or, if the power battery does not meet the second power-deficient threshold, the power battery is used to supplement the storage battery until the storage battery does not meet the first power-deficient threshold, so as to obtain a second supplementary power mode;

[0058] If not, the first charging amount that the power battery can charge the storage battery with is obtained by using the status information of the power battery and the second power-deficient threshold, and the number of charged onboard electrical appliances is obtained to obtain the power consumption of the charged onboard electrical appliances, and the second charging amount is used to generate the second charging amount, and the charging value and charging method of the power battery to the storage battery are selected based on the first charging amount and the second charging amount to obtain the third charging mode;

[0059] After selecting the first charging mode, the second charging mode or the third charging mode, it is determined whether the vehicle status information meets the preset conditions to select whether to perform charging of the power battery or the storage battery and select the charging mode.

[0060] Specifically, Figure 1-3As shown, a first power-loss threshold and a second power-loss threshold are set for the storage battery and the power battery respectively, wherein the first power-loss threshold and the second power-loss threshold of the storage battery and the power battery can be set accordingly according to the season and climate; when the vehicle is idle for a long time, it is easy to cause the vehicle's electrical system to lose power due to leakage, therefore, the wireless communication module connected to the vehicle VCU controller is used to periodically or irregularly wake up the vehicle's CAN network, and obtain the status information of the storage battery and the power battery respectively, and compare them with the first power-loss threshold and the second power-loss threshold set for whether the storage battery or the power battery is low on power, so as to execute whether it is necessary to The power battery is used to supplement the storage battery, wherein the first power-deficit threshold and the second power-deficit threshold of the storage battery and the power battery can be set as specific status information thresholds in combination with self-discharge, temperature, voltage, charge and discharge depth, and usage environment. For example, the charge state of the storage battery or the power battery is established, and the corresponding first power-deficit threshold and the second power-deficit threshold are generated; if it is determined that the power battery can be used to supplement the storage battery, the power battery is used to supplement the storage battery, and the status information of the storage battery and the power battery is obtained in real time. When the status information changes, the supplement process is terminated or ended.

[0061] Specifically, Figure 1-3 As shown, it is determined whether the storage battery meets the set first power-deficient threshold value. If so, it is further determined whether the power battery meets the second power-deficient threshold value. If the power battery meets the second power-deficient threshold value, the external charging device is used to recharge the power battery to obtain the first recharging mode. Based on the first recharging mode, it is determined whether the vehicle status information meets the preset conditions to select whether to perform recharging of the power battery. In this mode, when recharging the storage battery, when the power battery is insufficient to recharge the storage battery, the first recharging mode is first triggered, and the power battery is recharged by the external charging device first. The external charging device can be used to charge the power battery for a preset fixed time, or the vehicle status information changes, or the power battery is fully charged. The wireless communication module transmits instructions for charging the power battery to the remote terminal to remind the vehicle owner that the power battery needs to be charged and that the external charging device needs to be connected as soon as possible. After the external charging device is connected, the power battery is charged again until the power battery is restored to a saturated state. After that, the power battery charges the storage battery again until the storage battery is saturated.

[0062] Specifically, Figure 1-3As shown, it is determined whether the storage battery meets the set first power-loss threshold value. If so, it is continued to determine whether the power battery meets the second power-loss threshold value. If the power battery does not meet the second power-loss threshold value, the power battery is used to replenish the storage battery until the storage battery does not meet the first power-loss threshold value to obtain a second power replenishment mode. Based on the second power replenishment mode, it is determined whether the vehicle status information meets the preset conditions to select whether to perform power battery replenishment of the storage battery, and select the corresponding power battery to battery charging mode. In this state, the power battery is preferentially used to replenish the storage battery until the storage battery does not meet the first power-loss threshold value to complete the second power replenishment mode.

[0063] Specifically, determine whether the battery meets the set first power-deficit threshold. If the battery does not meet the first power-deficit threshold, use the power battery status information and the second power-deficit threshold to obtain the first power replenishment amount that the power battery can use to replenish the battery, and the first power replenishment amount is the maximum power replenishment amount that can be replenished to the battery in the current state while ensuring that the power battery does not suffer from power loss. At the same time, obtain the number of charged onboard electrical appliances running, and obtain the power consumption of the current charged onboard electrical appliances in a certain period of time, wherein the charged onboard electrical appliances are appliances that still need to run when the vehicle is in an off state, wherein the certain period of time can be measured in seconds or minutes. For example, the power consumption of the charged onboard electrical appliances per minute is obtained, which is converted into The power consumption of the charged on-board electrical appliances, obtaining a second replenishment power of the charged on-board electrical appliances corresponding to the number and power consumption based on historical data, respectively generating models of the number and power consumption of the charged on-board electrical appliances through the previously stored historical data, using the currently acquired number of charged on-board electrical appliances to obtain the second replenishment power under the number, and then using the power consumption of the charged on-board electrical appliances in the current state to calibrate the second replenishment power to obtain the calibrated second replenishment power, based on the obtained calibrated second replenishment power and the first replenishment power, selecting the replenishment value and replenishment method of the power battery to the storage battery to obtain a third replenishment mode, judging whether the vehicle status information meets the preset conditions based on the third replenishment mode, so as to select whether to perform the power battery to replenish the storage battery;

[0064] Specifically, in this state, when the battery does not meet the recharging conditions, the first recharging amount that the current power battery can recharge for the battery and the second recharging amount required for the charged onboard electrical appliances are considered. Not only can the number of charged onboard electrical appliances of the current vehicle be combined with the power consumption of the charged onboard electrical appliances over a certain period of time, but also the historical data can be used to generate a dynamic second recharging amount, considering the impact of the charged onboard electrical appliances on the battery depletion; at the same time, combined with the nuclear power state of the power battery, the first recharging amount is obtained by using the second depletion threshold of the power battery, and combined with the difference between the first recharging amount and the second recharging amount, while considering the impact of the state of the charged onboard electrical appliances on the recharging of the battery, the prevention of power battery loss is also considered; by respectively executing the first recharging mode, the second recharging mode and the third recharging mode, the power battery and the storage battery can be recharged when they are depleted. At the same time, in the process of the power battery recharging the storage battery, the third recharging mode can be used to more appropriately select the recharging value and recharging method of the power battery to the storage battery, taking into account the safety of the power battery and the consumption of the charged onboard electrical appliances.

[0065] In some embodiments, the method of obtaining the number of charged onboard electrical appliances includes: collecting the number of currently charged onboard electrical appliances in operation, obtaining the power consumption of the current charged onboard electrical appliances within a certain period of time, and obtaining the second power replenishment amount of the charged onboard electrical appliances corresponding to the number and power consumption based on historical data. Figure 1-3 As shown, the collection of the number of running charged on-board electrical appliances can be detected by a current sensor installed in the electrical system of the vehicle to obtain the number of running charged on-board electrical appliances in the vehicle, wherein the certain time can be measured in seconds or minutes, for example, the power consumption of the charged on-board electrical appliances per minute is obtained, which is then converted into the power consumption of the charged on-board electrical appliances per hour, and the second replenishment power of the charged on-board electrical appliances corresponding to the number and power consumption is obtained based on historical data, and models of the number and power consumption of the charged on-board electrical appliances are generated respectively through the historical data stored previously, and the currently obtained number of charged on-board electrical appliances is used to obtain the second replenishment power under the number, and then the power consumption of the charged on-board electrical appliances in the current state is used to calibrate the second replenishment power to obtain the calibrated second replenishment power, and based on the obtained calibrated second replenishment power and the first replenishment power, the replenishment value and replenishment method of the power battery to the storage battery are selected to obtain the third replenishment mode.

[0066] In some embodiments, the selection of the amount of power battery to be replenished and the replenishment method for the storage battery based on the first replenishment amount and the second replenishment amount is: judging whether the first replenishment amount is greater than or equal to the second replenishment amount, if so, using the power battery to fully replenish the storage battery, using the second replenishment amount as its replenishment value; if not, using the power battery to replenish the difference of the storage battery, using the first replenishment amount as its replenishment value. Figure 1-3As shown, based on the obtained first replenishment amount and second replenishment amount, when executing the third replenishment mode, by judging the difference between the first replenishment amount and the second replenishment amount, when the first replenishment amount is greater than or equal to the second replenishment amount, the power battery is used to fully replenish the storage battery. At this time, the second replenishment amount is used as its replenishment value. In this state, the second replenishment amount can satisfy the power battery without loss, and at the same time, it also makes up for the loss of the storage battery caused by the charged on-board electrical appliances; when the first replenishment amount is less than the second replenishment amount, the power battery is used to replenish the difference of the storage battery. It uses the first replenishment amount to replenish the storage battery, and then ends the current replenishment process. In this state, the safety of the power battery is taken into account to prevent it from losing money. After the third replenishment mode ends, the first replenishment mode is started again to replenish the power battery in time.

[0067] In some embodiments, the determination of whether the power battery meets the second power-deficient threshold further includes: obtaining the power battery status information, obtaining the last charging time of the power battery or the current system time, and if the time difference between the current system time and the last charging time is greater than 24 hours or the current system time is in the evening off-peak time of the power grid, using an external charging device to recharge the power battery. Figure 1-3 As shown, judging whether the power battery meets the second power-deficit threshold also includes: when the power state of the power battery does not meet the power replenishment state of the power battery, obtaining the state information of the power battery, obtaining the last charging time of the power battery or the current system time, and when the current system time is in the low-peak time of the power grid at night, the power battery can be charged by using the power grid, and the external charging device can be connected after the vehicle is parked, and charging is not performed at this time, and the vehicle VCU controller is awakened at a preset time when the power grid is in the low-peak time at night, so that the vehicle can be charged; at this time, the electricity fee is lower when charging by the power grid, and it is more convenient to charge the power battery during this time period and the cost is lower; or when the current system time is When the time difference between the system time and the last power battery charging time is greater than 24h, the power battery can be recharged, and the current vehicle status information is obtained to determine whether the vehicle status information meets the preset conditions. When the preset conditions are met, the power battery is recharged using an external charging device. If the external charging device is not connected, the wireless communication module transmits an instruction to recharge the power battery to the remote terminal to remind the vehicle owner that the power battery needs to be recharged. After the power battery is saturated, the external charging device ends the recharging of the power battery, obtains the battery status information, and re-determines whether to execute the power battery to recharge the battery, so as to recharge the battery using the power battery.

[0068] In some embodiments, the battery status information includes historical deviation data of the nuclear power status of the battery, the initial charging temperature and charging time of the last charge of the battery, and the current nuclear power status power value of the battery, the current temperature and the current charging time; the power battery information includes: the initial charging temperature and charging time of the last charge of the power battery, the historical deviation data of the nuclear power status of the power battery, and the current nuclear power status power value of the power battery, the current temperature and the current charging time.

[0069] Specifically, the battery status information includes historical deviation data of the nuclear power status of the battery, and the historical deviation data is used to offset the loss caused by the process of obtaining the nuclear power status of the battery, as well as the difference between the actual data. The historical deviation data can be obtained by sorting out the data in a weighted average manner taking into account the ambient temperature and the season, so that the actual nuclear power status data of the battery can be obtained each time the nuclear power status of the battery is sorted out; wherein, the battery's last initial charging temperature and charging time and the charge state value of the current state, the current temperature and the current charging time are used to determine whether the battery is being recharged or in charging mode, so as to protect the battery and prevent power outages, and at the same time improve the recharging efficiency by determining the charging mode.

[0070] Specifically, the historical deviation data of the nuclear power status of the power battery in the power battery information can clearly understand the real nuclear power status of the power battery when it is recharged, so that when using the storage battery and the power battery for recharging, the current nuclear power status can be obtained with real data, and judged with the recharging conditions of the storage battery or the power battery respectively, so as to clearly define whether it meets the recharging conditions. Among them, the initial charging temperature and charging time of the power battery when it was last charged, as well as the current nuclear power status power value, current temperature and current charging time of the power battery, are used to determine whether the power battery is recharged or in charging mode, so as to protect the power battery.

[0071] In some embodiments, the vehicle status information includes: vehicle defense status, ignition switch status, hood and door status, and vehicle component status. Specifically, the vehicle status information is obtained to determine whether the vehicle status information meets the preset conditions, and the vehicle status information is used as a judgment to determine whether the charging has started. If the vehicle status information does not meet the charging conditions during the process, the vehicle VCU controller controls the BCM module to adjust the status of each device on the vehicle until the vehicle status information meets the preset conditions. The charging operation is not performed. At the same time, the vehicle status information can also be used as a condition for the end of charging. When the vehicle status information changes, the charging is interrupted. For example, if the vehicle's power battery is damaged during the charging process, the charging process stops to ensure the safety of the charging process. The vehicle status information includes: The vehicle's defense status, ignition switch status, hood and door status, and vehicle component status are used to replenish power at an appropriate time for the vehicle. If one of them is not met, the vehicle VCU controller controls the BCM module to regulate it until the vehicle status information is met and then starts replenishing power; when one of the condition values ​​changes, the corresponding replenishing power status will also stop, thereby changing the current vehicle's replenishing power status. The vehicle's entire status information provides a judgment value for vehicle replenishment, so that replenishment can be carried out at an appropriate time to prevent the loss of the battery and power battery. The vehicle component status corresponds to whether the battery is faulty, whether the power battery is faulty, and whether other components are faulty.

[0072] In some embodiments, the determination of whether the vehicle status information satisfies the preset conditions is as follows: determining whether the vehicle defense status is in the off state; if so, determining whether the ignition switch status is in the off state; if so, determining whether the hood and door status are in the closed state; if so, determining whether the vehicle component status is in the normal state; if so, starting to perform the power replenishment. Specifically, Figure 2 As shown, when judging the vehicle status information, the ignition switch status, the hood and door status, and the vehicle component status are judged in turn to determine whether to execute the charging process. If one of them is not satisfied, the vehicle VCU controller controls the BCM module to regulate it until the vehicle status information is satisfied, and then the charging starts. At the same time, during the charging process, when any vehicle status information changes, the corresponding charging process also changes. For example, during the charging process, if the owner opens the door and needs to use the car, the entire charging process ends to protect the charging process.

[0073] In some embodiments, the selection of charging mode is: respectively obtaining the current temperature and current charging time of the power battery and the storage battery; and the initial charging temperature and charging time of the power battery and the storage battery when they were last charged, so as to obtain the charging difference time and charging difference temperature of the power battery and the storage battery; judging whether the charging difference temperature of the power battery and the storage battery is less than 20°C; if so, judging whether the charging difference time of the power battery and the storage battery is greater than 6h; if so, the charging mode of the power battery to the storage battery is fast charging, otherwise, the charging mode of the power battery to the storage battery is slow charging. Specifically, if Figure 1-3 As shown, during the replenishment process, the charging mode of the power battery to the storage battery can be determined as a fast charging mode or a slow charging mode. It uses the current temperature and current charging time of the power battery and the storage battery, as well as the stored initial charging temperature and charging time of the last charging corresponding to the storage battery and the power battery, and respectively uses the current temperature of the storage battery and the power battery minus the initial temperature of the last charging, and the current charging time minus the last charging time to obtain the charging difference temperature and the charging difference time respectively, and then judges whether the charging difference temperature of the power battery and the storage battery is less than 20°C. If so, it is obtained whether the charging difference time of the power battery and the storage battery is 6h. If so, the charging mode of the power battery to the storage battery and the storage battery to the power battery is fast charging, otherwise, it is slow charging. By determining the charging mode during the charging process, the progress of the replenishment process can be reasonably processed during the replenishment process. When the fast charging conditions are met, the charging efficiency is optimized. At the same time, when the slow charging mode is selected, the storage battery and the power battery are protected to prevent damage to them.

[0074] The present invention also provides a new energy vehicle battery charging system, which adopts the new energy vehicle battery charging method described in any of the preceding items, comprising:

[0075] A control module, used to wake up the vehicle VCU controller to control the issuance of a request for replenishing power to the storage battery or the power battery, the control module also includes a read-write submodule and a storage submodule, the read-write submodule is used to write a first power-deficient threshold and a second power-deficient threshold, and the storage submodule is configured into a plurality of sub-storage areas to store system data;

[0076] The acquisition module is used to collect system time, charging temperature and status information of storage batteries and power batteries, the number of onboard electrical appliances with power and power consumption, and then convert them into digital signals and store them in the control module;

[0077] Processing module, including:

[0078] The first processing submodule is used to obtain the status information of the storage battery and the power battery, and determine whether the status information of the storage battery and the power battery respectively meets the first power-deficient threshold and the second power-deficient threshold, and determine whether the first power-replenishing threshold is greater than or equal to the second power-replenishing threshold;

[0079] The second processing submodule is used to obtain the current vehicle status information and determine whether the vehicle status information meets the preset conditions;

[0080] The third processing submodule is used to obtain the status information of the storage battery and the power battery respectively, and to determine the charging mode of the power battery to the storage battery and the storage battery to the power battery respectively;

[0081] A DC-DC conversion module, wherein the DC-DC conversion module is connected to the storage battery and the power battery respectively to realize high-low voltage conversion between the power battery and the storage battery;

[0082] A charging module, used for charging in a determined fast charging mode or slow charging mode;

[0083] A programmable controller, wherein the programmable controller is connected to a battery management system of a new energy vehicle battery, and the programmable controller is connected to a processor in the battery management system through a serial port; the programmable controller is used to obtain a battery management control logic component in the processor, and to strip off a charging control logic from the battery management control logic component, and to lead the charging control logic to the programmable controller, and to enable the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and to store the scheme in the processor battery management control logic component through a serial port to form a battery charging control logic.

[0084] Specifically, a new energy vehicle battery charging system includes a control module, which is connected to the vehicle VCU controller to wake up the vehicle regularly or when needed, so as to send a charging request to the battery or power battery. The control module also includes a read-write submodule and a storage submodule. The read-write submodule is used to write a first power-loss threshold and a second power-loss threshold. The storage submodule is configured into multiple sub-storage areas to store system data; wherein the read-write submodule is used to write the first power-loss threshold and the second power-loss threshold into the system, and the first power-loss threshold and the second power-loss threshold can be set in combination with self-discharge, temperature, voltage, charge and discharge depth, and use environment. The storage submodule is used to store system data, such as status information transmitted by the storage battery and the power battery, vehicle status information, charging temperature, charging time, status of the charged on-board electrical appliances, and power consumption of the charged on-board electrical appliances; wherein the temperature can be obtained by using temperature sensors arranged on the power battery and the storage battery, the time can be the time of obtaining the vehicle system, and the status and power consumption of the charged on-board electrical appliances can be obtained by using the current sensor. The acquisition module is used to respectively acquire the system time, charging temperature, status and quantity of the charged on-board electrical appliances, and convert them into digital signals and store them in multiple sub-storages of the control module. area, and pass it to the processing module, wherein the first processing submodule in the processing module obtains the status information of the storage battery and the power battery after connecting the control module to the vehicle VCU controller, and judges whether the status information of the storage battery and the power battery meets the first power-deficient threshold and the second power-deficient threshold respectively, and judges whether the first power-replenishing threshold is greater than or equal to the second power-replenishing threshold; wherein the storage battery replenishes the power battery or the power battery replenishes the storage battery through the DC-DC conversion module to realize the high-low voltage conversion between the power battery and the storage battery; wherein the second processing submodule obtains the current vehicle status information, and judges whether the current vehicle status information is Whether the preset conditions are met, and the subsequent process will be carried out after they are met. The third processing submodule is used to obtain the status information of the battery and the power battery, and introduce the current system time to obtain the current charging time. After processing it with the status information of the battery and the power battery, the charging difference temperature and charging difference time of the battery and the power battery are obtained respectively. According to the corresponding charging mode obtained in the power replenishment process, fast charging or slow charging is selected, and the charging module is used to perform the charging mode of the power battery to the battery, so that according to the current actual situation of the vehicle, the corresponding charging mode is obtained to maximize the efficiency while ensuring the stability and safety of charging.

[0085] In some embodiments, the vehicle VCU controller is the core of the vehicle control system, and the vehicle VCU controller is also connected to a BCM module, a BMS battery module, and a wireless communication module, wherein the BCM module is used to control the status of various components on the vehicle; the BMS battery module obtains the status information and temperature parameters of the storage battery and the power battery respectively; the wireless communication module provides a remote communication connection for the vehicle

[0086] Specifically, the vehicle VCU controller is the core of the vehicle control system. When the vehicle is parked for a long time, the wireless communication module connected to the VCU controller is used to periodically and automatically wake up the CAN network, and then detect the storage battery or power battery through the BCM module and transmit the result to determine whether it needs to be recharged. At the same time, when the power battery needs an external charging device to recharge it, when the vehicle VCU controller controls the BMS battery to detect that its external charging device is not connected, the wireless communication module sends a signal to the mobile terminal through the wireless communication module to remind the owner that an external charging device needs to be connected. The wireless communication module can be a transmission method using 5G, WiFi, Bluetooth, etc., and the wireless terminal can be a mobile phone, tablet, computer and other terminals with information transmission function; when the BCM receives the information transmitted by the control module After the vehicle VCU controller receives the charging signal, the storage battery or power battery starts to be charged, wherein the BMS battery module respectively obtains the status information and temperature parameters of the storage battery and the power battery, and transmits them through the vehicle VCU controller, and obtains the charging mode of the selected group fast charging and slow charging through the connected third processing submodule; wherein the voltage conversion during the charging process is realized between the storage battery and the power battery through the DC-DC conversion module; wherein, when the BCM module controls and obtains the status of each device on the vehicle to obtain the status information of the whole vehicle, the vehicle VCU controller and the connected second processing submodule obtain the current status information of the whole vehicle and determine whether the status information of the whole vehicle meets the preset conditions. If not, the vehicle VCU controller adjusts the status information of the whole vehicle through the BCM module until the preset conditions are met before starting to charge;

[0087] If a vehicle status information changes during the charging process, a signal is transmitted to the mobile terminal through the wireless communication module to prompt the change of the vehicle status information. The owner determines whether to restore the corresponding vehicle status information according to the situation. When the corresponding vehicle defense status, ignition switch status, hood and door status, and vehicle component status in the vehicle status information are recoverable, the BCM module is adjusted to restore them. When they are irreversible, the vehicle VCU controller sends information to its wireless terminal through the wireless communication module to prompt that it has been damaged and needs to be dealt with in time. The charging process is completed through the cooperation of various components of the new energy vehicle battery charging system. In this process, the battery and power battery status information are obtained in real time, and real-time judgment is made to update the current charging to achieve two-way protection of the battery and power battery.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A method for replenishing the battery of a new energy vehicle, characterized in that: include: Provide a programmable controller, connect the programmable controller to the battery management system of the new energy vehicle battery, and connect the programmable controller to the processor in the battery management system through a serial port; The programmable controller obtains the battery management control logic component in the processor, and strips the charging control logic from the battery management control logic component, leads the charging control logic to the programmable controller, and enables the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and stores the scheme in the battery management control logic component in the processor through the serial port to form the battery charging control logic; At the same time, the first power-deficient threshold and the second power-deficient threshold of the storage battery and the power battery are set respectively by the programmable controller, and the vehicle VCU controller is awakened to obtain the status information of the storage battery and the power battery respectively; Determine whether the storage battery meets the first power-deficient threshold, and if so, continue to determine whether the power battery meets the second power-deficient threshold, and if the power battery meets the second power-deficient threshold, use an external charging device to recharge the power battery to obtain a first recharging mode; If the power battery does not meet the second power-deficient threshold, the power battery is used to supplement the storage battery until the storage battery does not meet the first power-deficient threshold, so as to obtain a second power supplement mode; If not, the first charging amount that the power battery can charge the storage battery with is obtained by using the status information of the power battery and the second power-deficient threshold, and the number of charged on-board electrical appliances is obtained to obtain the power consumption of the charged on-board electrical appliances, and the second charging amount is used to generate the second charging amount, and the charging value and charging method of the power battery to the storage battery are selected based on the first charging amount and the second charging amount, so as to obtain the third charging mode; After selecting the first charging mode, the second charging mode or the third charging mode, judging whether the vehicle status information meets the preset conditions, so as to select whether to perform charging of the power battery or the storage battery, and selecting the charging mode; The selection of the amount of power battery to replenish the storage battery and the replenishment method based on the first replenishment amount and the second replenishment amount is: Determine whether the first replenishment amount is greater than or equal to the second replenishment amount. If so, use the power battery to fully replenish the storage battery, and use the second replenishment amount as its replenishment value; If not, use the power battery to supplement the battery with the difference, and use the first supplementary amount as the supplementary value; The battery status information includes the historical deviation data of the battery's state of charge, the initial charging temperature and charging time of the battery's last charge, and the current state of charge value, current temperature, and current charging time of the battery; The state information of the power battery includes: the initial charging temperature and charging time of the power battery when it was last charged, the historical deviation data of the state of charge of the power battery, and the current state of charge value, current temperature and current charging time of the power battery; The selected charging mode is: Respectively obtaining the current temperature of the power battery and the storage battery, and the current charging time; and, the initial charging temperature and charging time of the power battery and the storage battery when they were last charged, so as to obtain the charging difference time and charging difference temperature of the power battery and the storage battery respectively; Determine whether the charging temperature difference between the power battery and the storage battery is less than 20°C; If yes, determine whether the charging difference time of the power battery and the storage battery is greater than 6 hours; If so, the charging mode of the power battery for the storage battery is fast charging; otherwise, the charging mode of the power battery for the storage battery is slow charging.

2. The method for replenishing the battery of a new energy vehicle according to claim 1, characterized in that: The amount of the charged onboard electrical appliances is obtained, and the power consumption of the charged onboard electrical appliances is obtained as follows: The number of currently charged on-board electrical appliances in operation is collected to obtain the power consumption of the current charged on-board electrical appliances within a certain period of time, and the second replenishment power of the charged on-board electrical appliances corresponding to the number and power consumption is obtained based on historical data.

3. The method for replenishing the battery of a new energy vehicle according to claim 1, characterized in that: Obtain the status information of the power battery, the last charging time of the power battery and the current system time. If the time difference between the current system time and the last charging time is greater than 24 hours or the current system time is during the low peak time of the power grid at night, use an external charging device to recharge the power battery.

4. The method for replenishing the battery of a new energy vehicle according to claim 1, characterized in that: The vehicle status information includes: vehicle defense status, ignition switch status, hood and door status, and vehicle component status.

5. The method for replenishing the battery of a new energy vehicle according to claim 4, characterized in that: The determination of whether the vehicle status information meets the preset conditions to select whether to perform power replenishment for the power battery or the storage battery is as follows: Determining whether the vehicle defense state is in a closed state; If yes, determining whether the ignition switch state is off; If yes, determining whether the hood and the door are in a closed state; If so, determine whether the vehicle component status is in a normal state; If yes, start charging.

6. A new energy vehicle battery charging system, characterized by: The method for replenishing the battery of a new energy vehicle according to any one of claims 1 to 5 comprises: A control module, used to wake up the vehicle VCU controller to control the issuance of a request for replenishing power to the storage battery or the power battery, the control module also includes a read-write submodule and a storage submodule, the read-write submodule is used to write a first power-deficient threshold and a second power-deficient threshold, and the storage submodule is configured into a plurality of sub-storage areas to store system data; The acquisition module is used to collect system time, the status information of the storage battery and the power battery, the number of onboard electrical appliances with power and the power consumption, and then convert them into digital signals and store them in the control module; Processing module, including: The first processing submodule is used to obtain status information of the storage battery and the power battery, and determine whether the status information of the storage battery and the power battery meets the first power-deficient threshold and the second power-deficient threshold respectively, and determine whether the first replenishment amount is greater than or equal to the second replenishment amount; The second processing submodule is used to obtain the current vehicle status information and determine whether the vehicle status information meets the preset conditions; The third processing submodule is used to obtain the status information of the storage battery and the power battery respectively, and to determine the charging mode of the power battery to the storage battery and the storage battery to the power battery respectively; A DC-DC conversion module, wherein the DC-DC conversion module is connected to the storage battery and the power battery respectively to realize high-low voltage conversion between the power battery and the storage battery; A charging module, used for charging in a determined fast charging mode or slow charging mode; A programmable controller, wherein the programmable controller is connected to a battery management system of a new energy vehicle battery, and the programmable controller is connected to a processor in the battery management system through a serial port; the programmable controller is used to obtain a battery management control logic component in the processor, and to strip off a charging control logic from the battery management control logic component, and to lead the charging control logic to the programmable controller, and to enable the programmable controller to compile the charging control logic to form a battery charging scheme in multiple modes, and to store the scheme in the battery management control logic component in the processor through a serial port to form a battery charging control logic.

7. The new energy vehicle battery charging system according to claim 6 is characterized in that: The vehicle VCU controller is the core of the vehicle's entire vehicle control system. The vehicle VCU controller is also connected to a BCM module, a BMS battery module, and a wireless communication module. The BCM module is used to control the status of various components on the vehicle; the BMS battery module obtains status information of the storage battery and the power battery respectively; and the wireless communication module provides a remote communication connection for the vehicle.

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