A Charging Method, Device, Equipment and Storage Medium for a Battery

Abstract

The present invention discloses a charging method, device, equipment and storage medium for a battery. The method includes: determining that a vehicle is connected to a charger, wherein a power battery is configured in the vehicle, and the power battery is associated with an actual remaining power ratio; controlling the charger to perform an initial charge on the power battery according to the actual remaining power ratio; during the initial charge, monitoring an overcharge protection operation of the charger, wherein the overcharge protection operation is that the charger stops charging the power battery in advance; if the overcharge protection operation is monitored, reducing the actual remaining power ratio to obtain a virtual remaining power ratio; and controlling the charger to perform a re-charge on the power battery according to the virtual remaining power ratio. It can avoid the overcharge protection operation of the charger, achieve the compatibility of different chargers, avoid the situation of the over-high actual remaining power ratio caused by the inability to be fully charged for a long time, avoid the situation of rapid power loss during the vehicle driving process, ensure that the user can drive the vehicle normally according to the plan, and ensure the driving safety of the user.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery charging method, device, equipment and storage medium. Background Art

[0002] With the development of new energy technologies, electric vehicles have become widely popular in recent years. Electric vehicles are vehicles powered by power batteries. The vehicles consume the electrical energy in the power batteries during driving. In order to ensure the normal driving of the vehicle, users will drive the vehicle to a charging station and use a charger to charge the power batteries before the power batteries run out of energy.

[0003] Different charging stations are equipped with different types of chargers. Since different types of chargers use different charging control logic, some chargers may overcharge the power battery, while some chargers may not be able to fully charge the power battery.

[0004] When the power battery's BMS (Battery Management System) detects that the charger has stopped charging, it will consider charging complete even if there is a small amount of uncharged energy, and calibrate the remaining power ratio. If the power battery is charged in this mode for a long time, it will not be fully charged for a long time, causing the power battery power ratio to be artificially high and the vehicle to lose power midway. Summary of the invention

[0005] The present invention provides a battery charging method, device, equipment and storage medium to solve the problem of an inflated remaining power ratio when charging a vehicle's power battery.

[0006] According to one aspect of the present invention, there is provided a battery charging method, comprising:

[0007] Determining that a vehicle is connected to a charger, wherein the vehicle is equipped with a power battery, and the power battery is associated with a real remaining power ratio;

[0008] controlling the charger to perform initial charging on the power battery according to the actual remaining power ratio;

[0009] During the initial charging process, monitoring the charger for overcharge protection operation, wherein the overcharge protection operation is that the charger stops charging the power battery in advance;

[0010] If the overcharge protection operation is detected, the actual remaining power ratio is reduced to obtain a virtual remaining power ratio;

[0011] The charger is controlled to recharge the power battery according to the virtual remaining power ratio.

[0012] According to another aspect of the present invention, there is provided a processing device for a battery charging method, including:

[0013] A vehicle access determination module, configured to determine that a vehicle is connected to a charger, wherein a power battery is configured in the vehicle, and the power battery is associated with an actual remaining power ratio;

[0014] A first control module, configured to control the charger to perform an initial charge on the power battery according to the actual remaining power ratio;

[0015] A monitoring module, configured to monitor an overcharge protection operation of the charger during the initial charge, wherein the overcharge protection operation is that the charger stops charging the power battery in advance;

[0016] A reduced power module, configured to reduce the actual remaining power ratio to obtain a virtual remaining power ratio if the overcharge protection operation is monitored;

[0017] A second control module, configured to control the charger to perform a re - charge on the power battery according to the virtual remaining power ratio.

[0018] According to another aspect of the present invention, there is provided an electronic device, including:

[0019] At least one processor; and

[0020] A memory communicatively connected to the at least one processor; wherein,

[0021] The memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is enabled to execute a battery charging method according to any embodiment of the present invention.

[0022] According to another aspect of the present invention, there is provided a computer - readable storage medium storing a computer program, and when the computer program is used to be executed by a processor, it implements a battery charging method according to any embodiment of the present invention.

[0023] In this embodiment, it is determined that a vehicle is connected to a charger. The vehicle is equipped with a power battery, and the power battery is associated with the actual remaining power ratio. The charger is controlled to perform an initial charge on the power battery according to the actual remaining power ratio. During the initial charge, overcharge protection operation is monitored for the charger. The overcharge protection operation is that the charger stops charging the power battery in advance. If the overcharge protection operation is detected, the actual remaining power ratio is reduced to obtain a virtual remaining power ratio. The charger is controlled to perform a second charge on the power battery according to the virtual remaining power ratio. The virtual remaining power ratio is lower than the actual remaining power ratio when the charger triggers the overcharge protection operation. Triggering the second charge in this way can avoid the overcharge protection operation of the charger, continue to charge the power battery, achieve compatibility with different chargers, ensure that the power battery is truly fully charged for a long time, avoid the situation of falsely high remaining power ratio caused by being unable to be fully charged for a long time, avoid the situation of rapid power loss during vehicle driving, ensure that users can drive the vehicle normally according to the plan, and ensure the driving safety of users.

[0024] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a flowchart of a method for charging a battery according to Embodiment 1 of the present invention;

[0027] Figure 2 is a schematic structural diagram of a battery charging device according to Embodiment 2 of the present invention;

[0028] Figure 3 is a schematic structural diagram of an electronic device implementing Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] Embodiment 1

[0032] Figure 1 The figure is a flowchart of a battery charging method provided for Embodiment 1 of the present invention. This embodiment is applicable to the situation where a virtual remaining battery level is constructed when the charger has an overcharging protection mechanism, and the power battery of the vehicle is charged for the second time. This method can be executed by a battery charging device, which can be implemented in the form of hardware and / or software, and can be configured in an electronic device, especially a BMS. As Figure 1 shown, the method includes:

[0033] Step 101, determine that the vehicle is connected to the charger.

[0034] In this embodiment, a power battery is configured in the vehicle, and the power battery is a power source that provides power for the vehicle. That is, the vehicle is a new energy vehicle configured with a power battery.

[0035] Generally, the power battery includes components such as a battery pack, a BMS, a distribution box, a maintenance switch, a housing, and a cooling plate. The power group contains a large number of series-connected and / or parallel-connected battery cells. During the daily operation of the vehicle, the battery management in the BMS configured for the power battery can be regarded as a part of the power management. Among them, the battery management mainly focuses on the operation of the power battery, monitors and controls the power battery, and feeds back the collected power battery information such as the temperature of the power battery and the remaining power of the power battery to the user. The power management effectively distributes the power of the power battery to different components of the vehicle.

[0036] When the remaining battery level of the power battery in the vehicle is insufficient, the vehicle is connected to the charger for charging operation.

[0037] The connection between the charger and the vehicle includes: high-voltage charging line, charging control guide line, charging control power line, charging monitoring communication line, and grounding protection line. The charger has a reserved communication interface for connecting to the charging station monitoring system.

[0038] The charger uses the Controller Area Network (CAN) bus and the CAN 2.0 protocol as its communication bus and protocol. Communication content includes: technical parameters of power battery cells, modules, and assemblies, power battery status parameters during charging, and basic vehicle information.

[0039] In a specific implementation, the power battery is mostly a lithium-ion battery, that is, a battery using lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution.

[0040] Exemplarily, the power battery is a lithium iron phosphate battery, which is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The single cell rated voltage is 3.2V and the charging cut-off voltage is 3.6V-3.65V.

[0041] During charging, some lithium ions in the lithium iron phosphate battery escape, travel through the electrolyte to the negative electrode, and become embedded in the negative electrode's carbon material. Simultaneously, electrons are released from the positive electrode and travel through the external circuit to the negative electrode, maintaining the chemical reaction balance. During discharge, lithium ions escape from the negative electrode and travel through the electrolyte to the positive electrode. Simultaneously, electrons are released from the negative electrode and travel through the external circuit to the positive electrode, providing energy for the vehicle.

[0042] A battery's state of charge (SOC) is defined as the ratio of the battery's actual remaining charge to its total available charge at a given discharge current. The remaining charge ratio is an indicator of the battery's true remaining charge. The SOC is the actual remaining charge ratio associated with the battery.

[0043] The actual remaining charge percentage associated with the power battery is used by the battery management system (BMS) installed at the battery end to monitor the actual remaining charge percentage of the power battery while the charger is charging the power battery. Estimating the power battery's state of charge is one of the functions of the BMS and is also a parameter used to assess vehicle range. The BMS uses sensors throughout the power battery to monitor power battery parameters, including voltage, current, and temperature.

[0044] Since the power battery state of charge, that is, the remaining power ratio of the power battery, cannot be obtained directly, the power battery state of charge can be estimated indirectly.

[0045] The methods for estimating the remaining power ratio of power batteries include: open circuit voltage method, ampere-hour integration method, internal resistance method, neural network and Kalman filtering method. Among them, the ampere-hour integration method is the most commonly used method for estimating power batteries. The state of charge of a power battery can directly affect the voltage and current of the power battery.

[0046] Exemplarily, the ampere-hour integration method calculates the total power flowing in and out by integrating time and current, and / or adding a compensation coefficient according to the external characteristics of the BMS, such as current, time, temperature compensation, etc., so as to estimate the state of charge of the battery.

[0047] Among them, temperature compensation means that the higher the temperature of the power battery, the more intense the chemical reaction; the lower the temperature, the more gentle the chemical reaction of the power battery. Therefore, when the temperature of the power battery is high, due to the intensification of the chemical reaction, it is necessary to reduce the floating charge voltage to slow down the chemical reaction; when the temperature of the power battery is low, the chemical reaction slows down, and at this time, it is necessary to increase the floating charge voltage to enhance the chemical reaction to ensure normal energy compensation.

[0048] When the state of charge of the power battery is known, it is equivalent to knowing the cruising range of the vehicle. And voltage and current are directly related to the efficiency of power output and energy management. The state of charge of the power battery is a basic parameter in the BMS. The management method in the BMS is implemented based on the state of charge of the power battery.

[0049] Step 102, control the charger to perform the initial charging on the power battery according to the true remaining power ratio.

[0050] The charger is controlled by the BMS installed at the end of the power battery, and performs the initial charging on the power battery according to the true remaining power ratio of the power battery.

[0051] Chargers include DC chargers and AC chargers.

[0052] A DC charger refers to a charger that uses the DC charging mode to charge the vehicle power battery assembly. The DC charging mode is a mode in which a controllable DC power source output by the charger charges the power battery assembly.

[0053] An AC charger refers to a charger that uses the AC charging mode to charge the vehicle power battery assembly. The characteristics of the AC charging mode are: the charger is an in-vehicle system. The charger is suitable for the type of power battery, that is, the charger can charge at least one of the following three types of power batteries: lithium-ion power battery, lead-acid power battery, nickel-metal hydride power battery. Lithium iron phosphate battery belongs to the lithium-ion power battery.

[0054] Among them, the power battery assembly is the only energy storage and supply system of pure electric vehicles. Through internal electrochemical reactions and electrical control, it stores energy from the power grid or on-board energy recovery system and provides driving energy to the vehicle's electric drive system and other power-consuming systems.

[0055] In a specific implementation, the BMS can encapsulate the actual remaining power ratio into a charging data packet. The charging data packet can include the power battery charging parameters during the charging parameter configuration phase. The charging data packet can also include message information during the charging phase, such as battery charging requirements, overall battery charging status, charger charging status, power battery status information, single power battery voltage, power battery temperature, and power battery reserved messages. The charging data packet is sent to the charger to notify the charger to charge the power battery according to the actual remaining power ratio.

[0056] In a certain charging protocol, the entire charging process consists of four phases: the charging handshake phase, the charging parameter configuration phase, the charging phase, and the charging end phase. In each phase, if the charger and BMS do not receive each other's message within the specified time or do not receive the correct message, it is considered a message reception timeout. The timeout period is 5 seconds unless otherwise specified. When a timeout occurs, the BMS or charger sends an error message (BEM or CEM) and injects an error status.

[0057] BEM is the message information of BMS receiving timeout, and CEM is the message information of charger receiving timeout.

[0058] After the charger and BMS are physically connected and powered on, the BMS first checks whether the low-voltage auxiliary power supply matches. If so, the two parties enter the charging handshake phase, with the charger first sending a CRM message. The CRM result at this point is 0x00, indicating that the charger cannot identify the vehicle. After receiving the CRM message from the charger, the BMS sends a BRM message indicating that the charger and the vehicle are identified. After receiving the BRM message from the charger and the vehicle, the charger sends a CRM message. The CRM result at this point is 0xAA, indicating that the charger can identify the vehicle. This completes the charging handshake phase.

[0059] After the message exchange between CRM and BRM is successfully completed, and the BMS receives the identification result of CRM as 0xAA, the charger and BMS will enter the next process: charging parameter configuration stage.

[0060] After the last charging handshake is completed, the charger and the BMS enter the charging parameter configuration phase. In this phase, after the BMS receives the CRM message with the identification result of 0xAA sent by the charger, it first sends the Battery Charging Parameter message BCP. After receiving this message, the charger sends the Clock Synchronization message CST and the Maximum Output Parameter message CML to the BMS. The BMS determines whether charging can be carried out based on the received CST and CML. After the judgment, it sends the BMS Charging Preparation Complete message BRO to the charger. After receiving the BRO, the charger sends the Charger Charging Preparation Complete message CRO to the BMS. If the BMS successfully receives the CRO message sent by the charger, the entire charging parameter configuration phase is completed.

[0061] In addition, the BMS sends the actual remaining power ratio to the vehicle instrument for display, so that the user can know the actual remaining power ratio when browsing the instrument.

[0062] The BMS sends the actual remaining power of the power battery to the vehicle based on the CAN bus communication protocol. When the vehicle receives the data of the actual remaining power of the power battery, it is displayed in the vehicle instrument in real time. The BMS encapsulates the actual remaining power of the power battery into the charging data packet and then sends the charging data packet to the charger based on the CAN bus communication protocol so that the charger can charge the power battery according to the actual remaining power ratio.

[0063] Exemplarily, the BMS of the power battery of a vehicle equipped with a power battery determines the remaining power ratio value of the power battery. The remaining power ratio is defined as the state of charge of the power battery, which is used to reflect the remaining power of the power battery, and its value is defined as the ratio of the remaining capacity to the capacity of the power battery. The BMS uploads the remaining power ratio value of the power battery to the vehicle instrument bus through the vehicle controller area network bus communication port. After the vehicle receives the data, it displays the remaining power ratio value of the power battery in real time in the vehicle instrument. When the charger performs a charging operation on the vehicle, the BMS sends the remaining power ratio value of the power battery to the charger through the CAN bus communication protocol. The controller area network communication network between the charger and the BMS consists of two nodes, the charger and the BMS. The data transmission uses the format of sending the lower bits first. The communication between the charger and the BMS uses a control area network interface independent of the powertrain control system.

[0064] Step 103: During the initial charging process, monitor the overcharge protection operation of the charger.

[0065] When the process before starting charging between the BMS and the charger is completed, it enters the charging stage. During the charging stage, the charger adjusts its output voltage and current according to the BMS demand message received to ensure the smooth progress of the charging process. During this process, if the charger times out in receiving the message (i.e., does not receive it within the specified time), it immediately stops charging, or if there is a fault that prevents normal charging, it also immediately stops charging.

[0066] During the charging stage, the BMS sends the battery charging total status message BCS and the battery charging demand message BCL to the charger. The charger receives these two messages within the specified time, sends the charger charging status message CCS to the BMS, and at the same time waits to see if it receives the charging termination message BST sent by the BMS. If it receives BST, the charger immediately stops charging and sends the charger termination charging message CST to the BMS as a response. After receiving the charger charging status message CCS sent by the charger, the BMS sends the battery status information BSM, the single battery voltage BMV, the single battery charge information, and the remaining charge ratio to the charger, and at the same time waits to see if it receives the charging abort message CST sent by the charger. If it receives CST, the BMS immediately sends BST to the charger to abort the charging and waits for the charging to be full.

[0067] In some cases, if the charger continues to charge the power battery after it is fully charged, it may damage the power battery. Therefore, some chargers provide overcharge protection operations when charging the power battery. The overcharge protection operation is for the charger to stop charging the power battery in advance, that is, when the power battery is not fully charged, it actively stops charging the power battery. At this time, the initial charging ends.

[0068] Since the overcharge protection operation will stop charging when the charging battery is not fully charged, causing the remaining charge ratio to be falsely high and power loss to occur, therefore, in this embodiment, during the charging process of the power battery, it is monitored whether the charger triggers the overcharge protection operation.

[0069] In one monitoring method, if the BMS monitors that the charger stops charging the power battery, it can detect the first state of the charger and / or the second state of the power battery.

[0070] If the current true remaining charge ratio is less than the preset value (also known as 100%, indicating that the charging battery is not fully charged), and the first state is normal and / or the second state is normal (indicating abnormal stop of charging during the charging process), it can be determined that the charger performs the overcharge protection operation. The preset value range is from 0 to 1, and / or from 0 to 100%. The preset value range does not include 0 and 1, and / or 0 and 100%.

[0071] During the initial charging process of the vehicle's power battery, for safety reasons and to prevent damage to the power battery, the BMS will monitor the charger for overcharge protection operations. The BMS monitors the states of the charger and the power battery. By monitoring the external characteristic parameters of the power battery such as voltage, current, and temperature, and then using algorithms, the BMS estimates and monitors the internal states of the power battery such as capacity and remaining power. When the power battery is being charged, the BMS estimates the state of charge of the power battery, that is, the remaining power of the power battery. When the charger charges the power battery, if the BMS monitors that the true remaining power ratio of the power battery reaches within the value specified in the agreement and the vehicle is less than the preset value, and the BMS monitors that the first state of the charger and / or the second state of the power battery is normal, it can be determined that the charger stops charging the power battery, which is the charger's protection operation for early stopping charging of the power battery.

[0072] Step 104: If an overcharge protection operation is monitored, reduce the true remaining power ratio to obtain a virtual remaining power ratio.

[0073] Generally, the charger triggers an overcharge protection operation when the remaining power ratio of the power battery reaches a certain ratio. When the BMS monitors an overcharge protection operation, the BMS can reduce the true remaining power ratio of the power battery to obtain a virtual remaining power ratio. Then, the virtual remaining power ratio will be lower than this ratio, which can be used to avoid the overcharge protection operation of the charger.

[0074] In one method, a target coefficient can be determined, where the target coefficient is equal to the true remaining power ratio when the charger performs an overcharge protection operation, that is, the condition for the charger to trigger an overcharge protection operation.

[0075] Multiply the current true remaining power ratio by the target coefficient to obtain a virtual remaining power ratio. The virtual remaining power ratio changes in real time following the true remaining power ratio. When the true remaining power ratio reaches 1, it triggers the BMS overcharge protection operation to adjust the strategy of the true remaining power ratio of the power battery, and use the adjusted remaining power ratio as the virtual power ratio of the power battery. No matter what the true remaining power ratio of the power battery that triggers the BMS overcharge protection operation is, it can trigger the BMS overcharge protection operation, with wide adaptability. Under the condition of ensuring full charge, it can avoid the situation of overcharging the power battery by the charger.

[0076] Exemplarily, Y = 0.95X, where X is the actual remaining power ratio of the power battery. The remaining power ratio of the power battery shown on the instrument sent by the BMS to the vehicle is the actual remaining power ratio. Y is the virtual remaining power ratio of the power battery sent by the BMS to the charger when the charger is charging. That is, when the BMS recognizes the end of charging, the BMS monitors that the actual remaining power ratio of the power battery is 0.95 times the remaining power ratio, where the remaining power ratio is the state of charge of the power battery, and its value is defined as the ratio of the actual remaining capacity to the capacity of the power battery. When the BMS monitors that the first state of the charger and the second state of the power battery are normal, the BMS determines that this charging end is an overcharge protection operation in which the charger stops charging the power battery in advance. The BMS adjusts the strategy of the remaining power ratio of the power battery. The value obtained by multiplying 0.95 by the actual remaining power ratio shown on the instrument sent to the vehicle is the virtual remaining power ratio. When charging, the BMS sends the virtual remaining power ratio of the power battery to the charger.

[0077] Step 105, control the charger to charge the power battery again according to the virtual remaining power ratio.

[0078] When the BMS reduces the actual remaining power of the power battery and obtains the virtual remaining power ratio, control the charger to charge the power battery again according to the virtual remaining power ratio of the power battery. That is, the charger considers the virtual remaining power ratio to be the actual remaining power ratio of the power battery and performs a new charging on the power battery again.

[0079] Considering that when the charger and the power battery disconnect and close the relevant circuits at the end of the initial charging, it will consume a certain amount of time. To ensure the normal execution of the recharging, the BMS can perform a timing operation. Among them, the timing operation is used to time a specified time, such as 10 seconds, etc.

[0080] When the timing operation ends, control the charger to charge the power battery again according to the virtual remaining power ratio. That is, the BMS delays to send a new charging request to the charger with the virtual remaining power, so that the charger charges the power battery again according to the virtual remaining power ratio.

[0081] In a specific implementation, replace the actual remaining power ratio with the virtual remaining power ratio and encapsulate it into the charging data packet, and send the charging data packet to the charger to notify the charger to charge the power battery according to the virtual remaining power ratio.

[0082] The charging data packet can be the charging parameters of the power battery during the charging parameter configuration stage. The charging data packet can also be the message information during the charging stage, such as battery charging requirements, total battery charging status, charger charging status, power battery status information, single-cell power battery voltage, power battery temperature, and power battery reserved messages.

[0083] In addition, the BMS can also send the actual remaining power ratio to the vehicle instrument for display.

[0084] Exemplarily, after the BMS monitors an overcharge protection operation, after a 10-second interval, the BMS establishes communication with the charger via the Controller Area Network (CAN) bus. The BMS re-initiates a charging request and adjusts the remaining power ratio strategy of the power battery: after multiplying 0.95 by the actual remaining power ratio to obtain a virtual remaining power ratio, at this time, the BMS sends the virtual remaining power ratio of the power battery to the charger via the CAN communication bus and the CAN2.0 communication protocol, and sends the actual remaining power ratio to the vehicle instrument for display. During charging, when the remaining power ratio displayed on the vehicle instrument is 1, charging is actively stopped and / or when the remaining power ratio displayed on the charger is 0.95, the charger actively stops charging.

[0085] When the charger charges the power battery again, the BMS performs the following judgments and operations on the power battery to prevent overcharging of the power battery when it is fully charged:

[0086] Judge whether the current actual remaining power ratio is equal to the preset value. If so, control the charger to stop charging the power battery. At this time, the BMS actively stops the charger from charging the power battery when the power battery is fully charged.

[0087] Alternatively, when it is determined that the charger triggers an overcharge protection operation when the virtual remaining power ratio reaches the specified ratio, and control the charger to stop charging the power battery. At this time, the charger believes that the virtual remaining power ratio is close to full charge (actually when the power battery is already fully charged) and actively triggers an overcharge protection operation to stop charging the power battery.

[0088] Exemplarily, after the charger charges the lithium iron phosphate power battery again, the BMS judges whether the current actual remaining power of the power battery is equal to the preset value via the CAN communication bus and the CAN2.0 communication protocol. When the actual remaining power is 1, stop controlling the charging of the power battery. When the BMS monitors that the charger triggers an overcharge protection operation when the virtual remaining power ratio of the battery reaches 100%, stop charging the lithium iron phosphate power battery via the CAN bus communication protocol and the CAN2.0 communication protocol.

[0089] In this embodiment, it is determined that the vehicle is connected to the charger. A power battery is configured in the vehicle, and the power battery is associated with the actual remaining power ratio. The charger is controlled to charge the power battery for the first time according to the actual remaining power ratio. During the first charging process, overcharge protection operation is monitored for the charger. The overcharge protection operation is that the charger stops charging the power battery in advance. If the overcharge protection operation is monitored, the actual remaining power ratio is reduced to obtain a virtual remaining power ratio. The charger is controlled to charge the power battery again according to the virtual remaining power ratio. The virtual remaining power ratio is lower than the actual remaining power ratio when the charger triggers the overcharge protection operation. In this way, the secondary charging is triggered, the overcharge protection operation of the charger can be avoided, the power battery can continue to be charged, the compatibility of different chargers can be realized, the power battery can be ensured to be truly full for a long time, the situation of the over-high remaining power ratio caused by the inability to be fully charged for a long time can be avoided, the situation of rapid power loss during vehicle driving can be avoided, the user can drive the vehicle normally according to the plan, and the driving safety of the user can be ensured.

[0090] Embodiment 2

[0091] Figure 2 FIG. is a schematic structural diagram of a battery charging device provided in Embodiment 2 of the present invention. As Figure 2 shown, the device includes:

[0092] A vehicle access determination module 201, configured to determine that the vehicle is connected to the charger. A power battery is configured in the vehicle, and the power battery is associated with the actual remaining power ratio.

[0093] A first control module 202, configured to control the charger to charge the power battery for the first time according to the actual remaining power ratio.

[0094] A monitoring module 203, configured to monitor the overcharge protection operation for the charger during the first charging process. The overcharge protection operation is that the charger stops charging the power battery in advance.

[0095] A power reduction module 204, configured to reduce the actual remaining power ratio to obtain a virtual remaining power ratio if the overcharge protection operation is monitored.

[0096] A second control module 205, configured to control the charger to charge the power battery again according to the virtual remaining power ratio.

[0097] In an embodiment of the present invention, the first control module 202 includes:

[0098] A first encapsulation module, configured to encapsulate the actual remaining power ratio into a charging data packet;

[0099] A first sending module, configured to send the charging data packet to the charger to notify the charger to charge the power battery according to the true remaining power ratio;

[0100] A second sending module, configured to send the true remaining power ratio to the instrument of the vehicle for display.

[0101] In an embodiment of the present invention, the monitoring module 203 includes:

[0102] A first detection module, configured to detect the first state of the charger and / or the second state of the power battery if the charger stops charging the power battery;

[0103] A first judgment module, configured to determine that the charger has performed overcharge protection operation if the true remaining power ratio is less than a preset value and the first state is normal and / or the second state is normal.

[0104] In an embodiment of the present invention, the power reduction module 204 includes:

[0105] A determination coefficient module, configured to determine a target coefficient, where the target coefficient is equal to the true remaining power ratio when the charger performs the overcharge protection operation;

[0106] A multiplication module, configured to multiply the current true remaining power ratio by the target coefficient to obtain a virtual remaining power ratio.

[0107] In an embodiment of the present invention, the second control module 205 includes:

[0108] A timing module, configured to perform a timing operation for timing a specified time;

[0109] A secondary charging control module, configured to control the charger to charge the power battery again according to the virtual remaining power ratio when the timing operation ends.

[0110] In an embodiment of the present invention, the second control module 205 includes: a second encapsulation module, configured to encapsulate the virtual remaining power ratio to replace the true remaining power ratio into the charging data packet;

[0111] A third sending module, configured to send the charging data packet to the charger to notify the charger to charge the power battery according to the virtual remaining power ratio;

[0112] A fourth sending module, configured to send the true remaining power ratio to the instrument of the vehicle for display.

[0113] In one embodiment of the present invention, the second control module 205 further includes:

[0114] A second judgment module, configured to judge whether the current true remaining power ratio is equal to a preset value; if so, call the charging stop module;

[0115] The charging stop module is configured to control the charger to stop charging the power battery;

[0116] Or,

[0117] The notification charging module is configured to determine that the charger triggers an overcharge protection operation when the virtual remaining power ratio reaches a specified ratio, and control the charger to stop charging the power battery.

[0118] The battery charging device provided by the embodiments of the present invention can execute the battery charging method provided by any embodiment of the present invention, and has function modules and beneficial effects corresponding to the execution of the battery charging method.

[0119] Embodiment III

[0120] Figure 3 FIG. shows a schematic structural diagram of an electronic device 10 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, for example, a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, for example, a personal digital processor, a cellular phone, a smart phone, a wearable device (such as a helmet, glasses, a watch, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0121] As Figure 3 shown, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program executable by at least one processor, and the processor 11 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0122] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0123] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the battery charging method.

[0124] In some embodiments, the battery charging method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the battery charging method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the battery charging method by any other suitable means (e.g., by means of firmware).

[0125] The various embodiments of the systems and technologies described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-chip (remaining battery level percentage), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor, and can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0126] A computer program for implementing the method of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer program may be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0127] In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium may be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0128] In order to provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0129] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0130] A computing system can include clients and servers. The clients and servers are generally far from each other and usually interact through a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. A server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0131] Embodiment 4

[0132] The embodiment of the present invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the battery charging method provided in any embodiment of the present invention.

[0133] In the process of implementing the computer program product, computer program code for performing the operations of the present invention can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network - including a local area network (LAN) or a wide area network (WAN) - or can be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0134] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0135] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A charging method for a battery, characterized in that, Including: Determine that a vehicle is connected to a charger, where a power battery is configured in the vehicle, and the power battery is associated with an actual remaining power ratio; Control the charger to perform an initial charge on the power battery according to the actual remaining power ratio; During the initial charge, monitor an overcharge protection operation of the charger, where the overcharge protection operation is that the charger stops charging the power battery in advance; If the overcharge protection operation is monitored, then reduce the actual remaining power ratio to obtain a virtual remaining power ratio; Control the charger to perform a re - charge on the power battery according to the virtual remaining power ratio.

2. The method according to claim 1, characterized in that, The controlling the charger to perform an initial charge on the power battery according to the actual remaining power ratio includes: Package the actual remaining power ratio into a charging data packet; Send the charging data packet to the charger to notify the charger to perform an initial charge on the power battery according to the actual remaining power ratio; Send the actual remaining power ratio to the instrument of the vehicle for display.

3. The method according to claim 1, characterized in that, The monitoring the overcharge protection operation of the charger includes: If the charger stops charging the power battery, then detect a first state of the charger and / or a second state of the power battery; If the actual remaining power ratio is less than a preset value, and the first state is normal and / or the second state is normal, then determine that the charger performs the overcharge protection operation.

4. The method according to claim 1, characterized in that, The reducing the actual remaining power ratio to obtain a virtual remaining power ratio includes: Determine a target coefficient, where the target coefficient is equal to the actual remaining power ratio when the charger performs the overcharge protection operation; Multiply the current actual remaining power ratio by the target coefficient to obtain a virtual remaining power ratio.

5. The method according to any one of claims 1 to 4, characterized in that The controlling the charger to perform a re - charge on the power battery according to the virtual remaining power ratio includes: Perform a timing operation, where the timing operation is used to time a specified time; When the timing operation ends, control the charger to charge the power battery again according to the virtual remaining power ratio.

6. The method according to any one of claims 1 to 4, characterized in that, The controlling the charger to perform a re - charge on the power battery according to the virtual remaining power ratio includes: Replace the actual remaining power ratio with the virtual remaining power ratio and package it into the charging data packet; Send the charging data packet to the charger to notify the charger to charge the power battery according to the virtual remaining power ratio; Send the actual remaining power ratio to the instrument of the vehicle for display.

7. The method according to claim 6, wherein The controlling the charger to charge the power battery again according to the virtual remaining power ratio further includes: Judge whether the current actual remaining power ratio is equal to the preset value; if so, control the charger to stop charging the power battery; Or, Determine that when the virtual remaining power ratio reaches a specified ratio, the charger triggers the overcharge protection operation and controls the charger to stop charging the power battery.

8. A charging device for a battery, characterized in that, Including: A vehicle access determination module, configured to determine that a vehicle accesses a charger, wherein a power battery is configured in the vehicle, and the power battery is associated with an actual remaining power ratio; A first control module, configured to control the charger to perform initial charging on the power battery according to the actual remaining power ratio; A monitoring module, configured to monitor an overcharge protection operation of the charger during the initial charging process, wherein the overcharge protection operation is that the charger stops charging the power battery in advance; A reduced power module, configured to reduce the actual remaining power ratio to obtain a virtual remaining power ratio if the overcharge protection operation is monitored; A second control module, configured to control the charger to perform recharging on the power battery according to the virtual remaining power ratio.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute a charging method for a battery according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is used to implement a charging method for a battery according to any one of claims 1-7 when executed by a processor.

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