Charging and discharging control method, device, equipment, system and storage medium

Abstract

The application provides a charging and discharging control method, device, equipment, system and storage medium. The method comprises the following steps: in response to a charging and discharging instruction, obtaining battery data of at least one single battery in a power battery system of a target device; determining a target battery that needs to be precisely controlled in charging and discharging from the at least one single battery according to the battery data of the at least one single battery; charging or discharging the target device and monitoring a battery parameter of the target battery; and stopping charging or discharging the target device in the case that the battery parameter of the target battery reaches a battery parameter threshold of the target battery. The technical solution can make the battery parameter meet the control requirement without disassembling the battery, and can improve the maintenance and detection efficiency of the power battery system in the target device.

Description

Technical Field

[0001] This application relates to the field of charging and discharging, and in particular to charging and discharging control methods, devices, equipment, systems and storage media. Background Technology

[0002] New energy vehicles refer to automobiles that use unconventional vehicle fuels as their power source. The power battery is a particularly crucial component of new energy vehicles, as its quality directly impacts the vehicle's performance. The power battery of a new energy vehicle typically consists of multiple individual cells connected in series. Due to unavoidable factors such as manufacturing processes and operating environments, voltage differences can arise between individual cells as they age or malfunction. Therefore, regular inspection and maintenance of each individual cell are necessary.

[0003] Currently, the repair and replacement process for power batteries in new energy vehicles requires first removing the entire power battery from the vehicle, and then performing charge / discharge tests on each individual cell or battery module to complete the repair or replacement. This process necessitates removing the power battery from the vehicle for repair and testing, resulting in low efficiency. Summary of the Invention

[0004] This application provides a charging and discharging control method, apparatus, equipment, system, and storage medium to solve the technical problem of low efficiency in the maintenance and testing of power batteries for new energy vehicles.

[0005] Firstly, a charging and discharging control method is provided, comprising:

[0006] In response to charging and discharging commands, acquire battery data of at least one individual cell in the power battery system of the target device;

[0007] Based on the battery data of the at least one individual battery, determine the target battery from the at least one individual battery that requires precise control of charging and discharging;

[0008] The target device is charged or discharged, and the battery parameters of the target battery are monitored.

[0009] When the battery parameters of the target battery reach the target battery parameter threshold, charging or discharging of the target device is stopped.

[0010] In this technical solution, after responding to a charge / discharge command and acquiring battery data of at least one individual battery in the power battery system of the target device, the target battery requiring precise charge / discharge control is first determined based on the battery data of the at least one individual battery. Then, the target device is charged or discharged, and the battery parameters of the target battery are detected. When the battery parameters of the target battery reach the target battery parameter threshold, charging or discharging of the target device is stopped. This allows the battery parameters of the target battery to be controlled within the set battery parameter threshold, achieving precise control of the battery parameters of the target battery in the power battery system of the target device. The battery can meet the control requirements without disassembling it, which can improve the maintenance and testing efficiency of the power battery system in the target device.

[0011] In conjunction with the first aspect, in one possible implementation, determining the target battery requiring precise charge / discharge control from the at least one individual battery based on its battery data includes: outputting the battery data of the at least one individual battery and acquiring a first user instruction set by the user based on the battery data of the at least one individual battery; and determining the target battery requiring precise charge / discharge control from the at least one individual battery based on the first user instruction. By outputting the battery data of the individual batteries and determining the battery requiring control based on the user instruction, the battery can be made to meet the user's needs.

[0012] In conjunction with the first aspect, in one possible implementation, before stopping charging or discharging the target device, the method further includes: acquiring a second user instruction set by the user based on the target battery, and determining the battery parameter threshold according to the second user instruction. By determining the battery parameter threshold of the battery to be controlled according to the user instruction, the battery parameters can be made to meet the user's needs.

[0013] In conjunction with the first aspect, in one possible implementation, the method further includes: setting the safety threshold of the target battery to the battery parameter threshold when the battery parameter threshold determined by the second user instruction does not meet the preset parameter conditions. Setting the battery safety threshold to the battery parameter threshold when the user-set battery parameters do not meet the preset parameter conditions ensures that the battery parameters are reasonable and effective.

[0014] In conjunction with the first aspect, in one possible implementation, before stopping charging or discharging the target device, the method further includes: determining a battery parameter threshold based on the current battery data and the initial battery data of the target battery. Setting the battery parameter threshold based on the current battery data and the initial battery data ensures that the battery parameter threshold is reasonable and effective.

[0015] In conjunction with the first aspect, in one possible implementation, obtaining battery data of at least one individual battery in the power battery system of the target device includes: obtaining battery data of at least one individual battery in the power battery system of the target device through a vehicle communication interface or a cloud platform.

[0016] In conjunction with the first aspect, in one possible implementation, the battery parameter thresholds include a first threshold, and / or a second threshold, and / or a third threshold, wherein: the first threshold is a threshold set for the average voltage of a single battery cell; the second threshold is a threshold set for the extreme voltage of a single battery cell; and the third threshold is a threshold set by the target user for the total voltage of a single battery cell.

[0017] In conjunction with the first aspect, in one possible implementation, the battery parameter threshold includes a voltage threshold; the charging or discharging of the target device includes: when the voltage of the target battery reaches the voltage threshold, charging or discharging the target device using a constant voltage control method until the total current of the power battery system is less than or equal to a preset current threshold. Charging or discharging the target device using a constant voltage control method until the total current of the target device's power battery system is less than the preset current threshold when the target battery reaches the user-set voltage threshold ensures that the target battery meets user requirements; constant voltage charging allows the voltage of the target battery to be precisely maintained at the set voltage threshold, which helps in the calibration of the remaining capacity of the target device's power battery system.

[0018] In conjunction with the first aspect, in one possible implementation, after stopping charging or discharging the target device, the method further includes: determining charging and discharging process parameters of the target battery, the charging and discharging process parameters including the duration of the target battery from its current parameter value to the battery parameter threshold, and charging and discharging parameters for charging or discharging the target device; and generating a battery detection result for the target battery based on the charging and discharging process parameters, the battery detection result indicating the health status of the target battery. By generating a battery detection result for the target battery based on the charging and discharging process parameters of the target battery during the charging and discharging process, a preliminary detection and judgment of the battery in the target device can be achieved, facilitating maintenance and testing personnel to better understand the status of the battery in the target device.

[0019] Secondly, a charging and discharging control device is provided, comprising:

[0020] The battery data acquisition module is used to respond to charging and discharging commands and acquire battery data of at least one single cell in the power battery system of the target device.

[0021] A battery determination module is used to determine, based on the battery data of the at least one individual battery, a target battery from the at least one individual battery that requires precise control of charging and discharging.

[0022] The parameter monitoring module is used to charge or discharge the target device and monitor the battery parameters of the target battery.

[0023] The control module is used to stop charging or discharging the target device when the battery parameters of the target battery reach the battery parameter threshold of the target battery.

[0024] Thirdly, a computer device is provided, including a memory, a communication interface, and one or more processors, wherein the memory and the communication interface are connected to the one or more processors, and the one or more processors are configured to execute one or more computer programs stored in the memory, wherein when the one or more processors execute the one or more computer programs, the computer device implements the charging and discharging control method of the first aspect described above.

[0025] Fourthly, a computer-readable storage medium is provided, which stores a computer program, the computer program including program instructions, which, when executed by a processor, cause the processor to perform the charging and discharging control method of the first aspect.

[0026] Fifthly, a target communication system is provided, the target communication system including a target device and the charging and discharging device, the communication interface of the charging and discharging device being connected to the communication interface of the target device, the target device including a power battery system including at least one single cell, and the charging and discharging device being used to execute the charging and discharging control method of the first aspect.

[0027] This application can achieve the following technical effects: control the battery parameters of the target battery within the set battery parameter threshold, realize precise control of the battery parameters of the target battery in the power battery system of the target device, and make the battery meet the control requirements without disassembling the battery, thereby improving the maintenance and testing efficiency of the power battery system in the target device. Attached Figure Description

[0028] Figure 1 A schematic diagram of the system architecture of a target communication system provided in an embodiment of this application;

[0029] Figure 2 A schematic flowchart of a charging and discharging control method provided in an embodiment of this application;

[0030] Figure 3 This is a user interaction diagram provided for an embodiment of this application;

[0031] Figure 4 This is a schematic diagram illustrating the real-time display of battery data provided in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the structure of a charge / discharge control device provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0035] The technical solution of this application is applicable to charging and discharging scenarios, specifically to charging and discharging scenarios capable of communication interaction. For ease of understanding, the charging and discharging communication architecture of this application is first introduced. See [link to relevant documentation]. Figure 1 , Figure 1 This application provides a schematic diagram of the system architecture of a target communication system, as shown in the embodiments below. Figure 1 As shown, the target communication system 10 includes a target device 101 and a charging / discharging device 102. The target device 101 includes a power battery system, which comprises at least one single-cell battery. The power battery system of the target device 101 provides power to the target device to drive it. Specifically, the target device 101 can be a vehicle, such as an electric vehicle. The charging / discharging device 102 is a device capable of charging and / or discharging the target device 101. The charging / discharging device 102 may conform to one or more charging and / or discharging standards.

[0036] Both the charging / discharging device 102 and the target device 101 include a charging / discharging interface and a communication interface.

[0037] The charging / discharging interface of the charging / discharging device 102 is connected to the charging / discharging interface of the target device 101, so as to enable the charging / discharging device 102 to charge the target device 101, or to discharge the target device 101. The charging / discharging interface of the charging / discharging device 102 and the charging / discharging interface of the target device 101 can be charging / discharging interfaces that conform to one or more charging / discharging standards.

[0038] The communication interface of the charging / discharging device 102 is connected to the communication interface of the target device 101 to enable communication between the charging / discharging device 102 and the target device 101, allowing the charging / discharging device 102 to acquire battery data from the power battery system in the target device 101. The communication interface of the target device 101 can be a physical communication interface, such as an on-board diagnostics (OBD) interface, a battery management system (BMS) interface, or a telematics box (T-box) interface if the target device 101 is a vehicle; or a software communication interface, such as a Bluetooth interface or a WiFi interface. The communication interface of the charging / discharging device 102 can be a physical communication interface, such as a universal serial bus (USB) interface or an Ethernet interface; or a software communication interface, such as a Bluetooth interface or a WiFi interface.

[0039] The connection between the communication interface of the charging / discharging device 102 and the communication interface of the target device 101 can be a direct connection, for example, the communication interface of the charging / discharging device 102 can be connected to the communication interface of the target device 101 through a data communication line; the connection between the communication interface of the charging / discharging device 102 and the communication interface of the target device 101 can also be an indirect connection, for example, when the target device 101 is an electric vehicle, the communication interface of the charging / discharging device 102 can be connected to the communication interface of the target device 101 through a vehicle communication interface (VCI) module.

[0040] The charging / discharging interface and communication interface of the charging / discharging device 102 and the target device can be two independent interfaces, or they can share the same physical interface.

[0041] The target communication system may further include a cloud platform 103, which can be connected to the target device 101 to acquire battery data of the power battery system in the target device 101. The cloud platform 103 can be directly connected to the target device 101 or indirectly connected through other communication devices. For example, if the target device 101 is a car, the cloud platform can connect to the target device 101 through a VCI module. The cloud platform 103 can also be connected to a charging / discharging device 102 to send the acquired battery data of the power battery system in the target device 101 to the charging / discharging device 102, or to instruct the charging / discharging device 102 to charge or discharge. Specifically, the cloud platform 103 can be a cloud server.

[0042] The target communication system 10 may further include a user interaction device 104, which is connected to the charging / discharging device 102 or the cloud platform 103 to enable interaction with the user. The user interaction device 104 may include an input interface and an output interface. The input interface is used to acquire user commands and send them to the charging / discharging device 102 or the cloud platform 103. The input interface may include, for example, a touch screen or buttons. The output interface is used to output charging / discharging related data to the user, such as charging / discharging parameters, and may also be used to indicate the charging / discharging status. The output interface may include, for example, a display, a buzzer, or an indicator light.

[0043] When the user interaction device 104 is connected to the charging and discharging device 102, the user interaction device 104 and the charging and discharging device 102 can be independent devices. For example, the user interaction device 104 can be a user interaction terminal such as a mobile phone or tablet. The user interaction device 104 can also be a component integrated on the charging and discharging device 102, such as a touch screen or buttons set on the charging and discharging device 102.

[0044] based on Figure 1 The system architecture shown can implement the technical solution of this application. The technical solution of this application is described in detail below.

[0045] See Figure 2 , Figure 2 This is a flowchart illustrating a charging and discharging control method provided in an embodiment of this application. This method can be applied to... Figure 1 On the charging and discharging device 102 or cloud platform 103, such as Figure 2 As shown, the method includes the following steps:

[0046] S201, in response to a charge / discharge command, acquire battery data of at least one individual cell in the power battery system of the target device.

[0047] Among them, the charge / discharge command refers to the command used to instruct the target device to charge or discharge, and the target device can be the electric vehicle described above.

[0048] The charging / discharging command can be triggered by the user through a user interaction device. For example, when a user initiates charging or discharging of the target device on the user interaction device, a charging / discharging command is received. Optionally, the charging / discharging command can also be triggered automatically, for example, when the charging / discharging device is detected to be connected to the charging interface of the target device.

[0049] Battery data of at least one individual cell in a power battery system can be used to indicate the battery state of at least one individual cell in the power battery system. Specifically, the battery data of at least one individual cell may include the total voltage of the at least one individual cell, the voltage of each individual cell in the at least one individual cell, the current of each individual cell, the highest voltage of all individual cells in the at least one individual cell, the lowest voltage of the at least one individual cell, the average voltage of the at least one individual cell, and the total current of the at least one individual cell. Optionally, the battery data of at least one individual cell may also include the total voltage of each battery module in the power battery system, the highest voltage of each individual cell in each battery module, the lowest voltage of each individual cell in each battery module, the average voltage of each individual cell in each battery module, and the total current in each battery module. Here, a battery module refers to a battery grouping in a power battery system that groups individual cells according to a certain grouping rule to obtain a battery group composed of multiple individual cells to provide higher voltage and capacity. It should be understood that the battery data of at least one individual cell is not limited to the data listed above; any data related to the batteries in the power battery system can be referred to as battery data.

[0050] Specifically, battery data of at least one individual cell in the target device's power battery system can be obtained through a communication connection with the target device. When the technical solution of this application is applied to a charging / discharging device, battery data of at least one individual cell in the target device's power battery system can be obtained through a vehicle communication interface or a cloud platform.

[0051] S202, based on the battery data of at least one single cell in the power battery system of the target device, determine the target battery from at least one single cell in the power battery system of the target device that requires precise control of charging and discharging.

[0052] The target battery may include all individual cells in the power battery system of the target device, or it may include a portion of individual cells from at least one individual cell in the power battery system of the target device. The target battery may include one or more individual cells in the power battery system, which may be continuous individual cells or discontinuous cells.

[0053] In one feasible implementation, the target battery can be determined based on user instructions.

[0054] Specifically, it can output battery data of at least one cell in the power battery system of the target device, and obtain a first user instruction set by the user based on the battery data of the at least one cell; according to the first user instruction, it can determine the target battery that needs to be precisely controlled for charging and discharging from the at least one cell.

[0055] Specifically, the battery data of at least one individual battery can be displayed to the user through a user interaction device, and the battery selected by the user in the user interaction device can be identified as the target battery.

[0056] For example, see Figure 3 , Figure 3 This is an interactive schematic diagram illustrating the acquisition of a first user instruction provided in an embodiment of this application. Figure 3 As shown, after obtaining the battery data of at least one single cell in the power battery system of the target device through the communication connection with the target device, the battery data of the at least one single cell can be displayed through the user interaction device. The user interaction device can display P1 to the user. Assuming that the user selects battery 1 to battery 3 in P1, the user interaction device can display P2 to the user. After the user clicks OK, it can be confirmed that the target battery selected by the user is battery 1 to battery 3.

[0057] By outputting battery data for individual cells and determining which cells need to be controlled based on user instructions, the battery can be made to meet user requirements.

[0058] Optionally, the target battery can be automatically selected based on the battery data of the at least one individual battery. For example, the battery with the lowest voltage among the at least one individual batteries can be determined based on the battery data, and that battery with the lowest voltage can be designated as the target battery. Similarly, the battery with the highest voltage among the at least one individual batteries can be determined based on the battery data, and that battery with the highest voltage can be designated as the target battery. Furthermore, the peak voltage of each individual battery in the at least one individual battery can be determined based on the battery data; the peak voltage refers to the highest voltage that a single battery can achieve. The battery whose peak voltage differs from the ideal peak voltage by a preset difference is designated as the target battery, where the ideal peak voltage is the voltage that a single battery can achieve under ideal conditions. These examples are not limited to. The selection of which one or more individual batteries in the power battery system of the target device are chosen as the target battery can be set based on actual needs.

[0059] S203, to charge or discharge the target device.

[0060] Here, if the charge / discharge command is used to instruct the target device to charge, then the target device will be charged; if the charge / discharge command is used to instruct the target device to discharge, then the target device will be discharged. If the charging / discharge device only supports charging, the charge / discharge command will by default instruct the target device to charge; if the charging / discharge device only supports discharging, the charge / discharge command will by default instruct the target device to discharge.

[0061] The target device can be charged or discharged using any charging or discharging method. Specific methods for charging or discharging the target device will be described later and will not be elaborated upon here.

[0062] S204 monitors the battery parameters of the target battery.

[0063] Here, the battery parameters of the target battery can be obtained through a communication connection with the target device to monitor the battery parameters. If the battery parameters of the target battery do not reach the battery parameter threshold, it means that the battery parameters of the target battery do not currently meet the control requirements, and the target device needs to continue charging or discharging, and step S203 is executed; if the battery parameters of the target battery reach the battery parameter threshold, it means that the battery parameters of the target battery meet the control requirements, and step S204 is executed.

[0064] Among them, the battery parameter threshold of the target battery refers to the threshold set for one or more battery parameters that need to be monitored for the target battery. Battery parameters refer to the parameters that can be modified and set in the battery data. Specifically, battery parameters can be parameters such as the highest voltage, lowest voltage, average voltage, and total voltage of the target battery. The battery parameter threshold is the threshold set for one or more of the highest voltage, lowest voltage, average voltage, or total voltage of the target battery.

[0065] In one feasible implementation, the battery parameter thresholds of the target battery can be determined based on user instructions.

[0066] Specifically, a second user instruction based on the target battery settings can be obtained, and the battery parameter threshold of the target battery can be determined according to the second user instruction.

[0067] Specifically, a second user instruction based on the target battery settings can be obtained through a user interaction device, and the battery parameter threshold of the target battery can be determined.

[0068] For example, see [link to previous article] Figure 3 Assuming the target batteries include batteries 1 through 3 selected by the user, the user interaction device can display P3 to the user; assuming the user selects the highest voltage of a single battery in P3, the user interaction device can display P4 to the user; assuming the user sets a threshold of 50 in P4, it can be determined that the user has set the battery parameter to the highest voltage of a single battery and the set battery parameter threshold is 50, and the user interaction device displays P5.

[0069] By determining the battery parameter thresholds that need to be controlled based on user instructions, the battery parameters can be made to meet user requirements.

[0070] Optionally, if the battery parameter threshold determined based on the second user instruction does not meet the preset parameter conditions, the safety threshold of the target battery can also be set as the battery parameter threshold.

[0071] The preset parameter conditions refer to the conditions pre-set based on the battery parameters determined by the user's instructions. The purpose of these preset parameter conditions is to ensure that the battery parameters are within a reasonable range. These preset parameter conditions include the reasonable parameter range set for the battery parameters. For example, if the battery parameter to be monitored is the maximum voltage of a single cell, then the preset parameter conditions are the conditions set for that maximum voltage. For instance, the preset parameter conditions could be a reasonable voltage range corresponding to the maximum voltage of a single cell. If the user-set threshold for the maximum voltage of a single cell falls within this voltage range, then the preset parameter conditions are met; otherwise, they are not.

[0072] The safety threshold of the target battery is the threshold that makes the battery parameters reasonable. The safety threshold of the target battery can be the maximum value within a reasonable parameter range. Taking the highest voltage of the battery parameter that needs to be monitored as an example, the safety threshold of the target battery can refer to the maximum value within a reasonable voltage range corresponding to the highest voltage of a single cell.

[0073] Specifically, the target battery parameters determined by the second user instruction can be obtained, and a reasonable parameter range corresponding to the target battery parameters can be determined. The battery parameter threshold is then compared with this reasonable parameter range to determine whether the battery parameter threshold meets the preset parameter conditions. If the battery parameter threshold is within the reasonable parameter range, it meets the preset parameter conditions; otherwise, it does not meet the preset parameter conditions. It should be noted that for the same battery parameter, when the user sets multiple thresholds, if any one of the multiple thresholds is within the parameter range corresponding to the battery parameter, it is determined that the user-set battery parameter threshold meets the preset parameter conditions, and this threshold within the parameter range is determined as the battery parameter threshold. If none of the multiple thresholds are within the parameter range corresponding to the battery parameter, it is determined that the user-set battery parameter threshold does not meet the preset parameter conditions. When multiple battery parameters need to be monitored, for each battery parameter that needs to be monitored, the same method can be used to determine whether its corresponding battery parameter threshold meets the preset parameter conditions, thereby determining the parameter threshold for each battery parameter.

[0074] When the battery parameters set by the user do not meet the preset parameter conditions, the battery safety threshold is set to the battery parameter threshold to ensure that the battery parameters are reasonable and effective.

[0075] In another feasible implementation, the battery parameter threshold of the target battery can also be determined based on the current battery data of the target battery.

[0076] Specifically, the battery parameter thresholds of the target battery can be determined based on the current battery data and the initial battery data of the target battery.

[0077] In one specific implementation, for the battery parameters that need to be monitored, the most recent peak value of the target battery parameter in the historical time period can be obtained as the current battery data. The most recent peak value in the historical time period can be obtained as the initial battery data. The peak ratio between the current and initial battery data is determined, and the product of this ratio and an ideal battery parameter threshold is used to determine the battery parameter threshold for the target battery. This ideal parameter threshold is the battery parameter threshold corresponding to the parameter under ideal conditions. Taking the highest voltage of a single cell as an example, the earliest highest voltage of a single cell in the historical time period can be obtained as the initial battery data. The most recent highest voltage of a single cell in the historical time period can be used as the current battery data. The ratio between the two is then calculated, and this ratio is multiplied by the ideal threshold for the highest voltage of a single cell to obtain the battery parameter threshold for the target battery.

[0078] Setting battery parameter thresholds based on the current battery data and the initial battery data ensures that the battery parameter thresholds are reasonable and effective.

[0079] Optionally, after monitoring the battery parameters of the target battery, these parameters can be displayed in real time. Specifically, the battery parameters of the target battery can be displayed in real time through a user interaction device.

[0080] For example, suppose the target battery selected by the user is Figure 3 A schematic diagram showing the real-time battery parameters of batteries 1 to 3 in the image, displayed on the user interaction device, can be shown as follows: Figure 4 As shown, the voltage values ​​of batteries 1 to 3 are displayed respectively, as well as the highest voltage, lowest voltage, average voltage, total voltage, and current charging current of batteries 1 to 3.

[0081] By displaying the target battery's parameters in real time, users can understand the charging and discharging status of the selected battery.

[0082] The battery parameters that need to be monitored and the battery parameter thresholds set are different, and the logic for determining whether the target battery's battery parameters have reached the battery parameter thresholds is different. For the specific logic for determining whether the battery parameters have reached the battery parameter thresholds, please refer to the following description, which will not be described in detail here.

[0083] S205, Stop charging or discharging the target device.

[0084] Specifically, if the technical solution of this application is applied to a charging and discharging device, the charging and discharging device can directly charge or discharge the target device, and stop charging or discharging the target device; if the technical solution of this application is applied to a cloud platform, the cloud platform can control the charging and discharging device to charge or discharge the target device, and stop charging or discharging the target device, by sending instructions to the charging and discharging device.

[0085] exist Figure 2 In the corresponding technical solution, after responding to a charge / discharge command and obtaining battery data from at least one individual battery in the power battery system of the target device, the target battery requiring precise charge / discharge control is first determined from the at least one individual battery based on the battery data. Then, the target device is charged or discharged, and the battery parameters of the target battery are detected. When the battery parameters of the target battery reach the target battery parameter threshold, charging or discharging of the target battery is stopped. This allows the battery parameters of the target battery to be controlled within the set battery parameter threshold, achieving precise control of the battery parameters of the target battery in the power battery system of the target device. The battery can meet the control requirements without disassembling it, which can improve the maintenance and testing efficiency of the power battery system in the target device.

[0086] Optionally, in some possible cases, the state of the target battery can also be determined based on the specific circumstances of the target battery during charging or discharging. After the aforementioned charging or discharging of the target device is stopped, the charging and discharging process parameters of the target battery can also be determined. These parameters include the duration of the target battery's charge / discharge from its current parameter value to a battery parameter threshold, as well as the charging and discharging parameters for charging or discharging the target device. Based on the charging and discharging process parameters of the target battery, a battery detection result is generated, which indicates the health status of the target battery.

[0087] Among them, the current battery parameter value of the target battery refers to the initial parameter value of the target battery at the start of charging or discharging; the charge and discharge parameters refer to the parameters used during the charging or discharging process of the target device, such as charging current and discharging current; the health status of the target battery refers to the state reflecting the various performance characteristics of the battery.

[0088] In some possible implementations, the standard charge / discharge duration corresponding to the charge / discharge parameters can be obtained, and the duration can be compared with the standard charge / discharge duration to generate the battery test result of the target battery.

[0089] To illustrate, let's take charging a target device as an example. Suppose the target device is charged using charging parameter X1. The theoretical time for charging the target device from the current battery parameter value to the battery parameter threshold using charging parameter X1 is T1. However, in the actual charging process, the duration for charging the target device from the current battery parameter value to the battery parameter threshold is T2. If T2 is greater than T1, it means that the charging speed of the target battery is slow, and the target battery may be aging. The aging rate can be T2 / T1. If T2 is less than T1, it means that the target battery is in good health.

[0090] It should be understood that the above examples are merely illustrative of how this application generates battery test results for the target battery based on the charging and discharging process parameters of the target battery, and do not limit this application. Other methods can also be used to generate battery test results for the target battery, and this application does not impose any restrictions.

[0091] By generating battery detection results based on the charging and discharging process parameters of the target battery, a preliminary detection and judgment of the battery in the target device can be achieved, making it easier for maintenance and testing personnel to better understand the status of the battery in the target device.

[0092] Because the battery parameters to be monitored and the set battery parameter thresholds are different, the logic for determining whether the target battery's battery parameters have reached the thresholds differs. The following sections describe the specific implementation methods for determining whether battery parameters have reached the thresholds, categorized by case.

[0093] In the first case, the battery parameter threshold can be a threshold set for the average voltage of a single cell (hereinafter referred to as the first threshold). The specific process of monitoring the battery parameters of the target battery can include the following steps A1 to A4.

[0094] A1. Obtain the voltage of each individual cell in at least one individual cell.

[0095] Here, at least one individual cell is a user-selected individual cell. Specifically, the voltage of each individual cell in the at least one individual cell can be obtained through a communication connection with the target device.

[0096] A2. Calculate the average voltage of at least one individual cell based on the voltage of each individual cell.

[0097] The formula for calculating the average voltage is as follows:

[0098]

[0099] CV avg The average voltage, CV iThe voltage of the i-th cell selected by the user, and n is the number of cells selected by the user.

[0100] A3. If the average voltage of at least one individual cell reaches the first threshold, determine that the battery parameters of the target battery have reached the battery parameter threshold.

[0101] Specifically, if the target device is being charged, the first threshold is reached when the average voltage of the at least one individual battery is greater than or equal to the first threshold; if the target device is being discharged, the first threshold is reached when the average voltage of the at least one individual battery is less than or equal to the first threshold.

[0102] A4. If the average voltage of at least one individual cell does not reach the first threshold, it is determined that the battery parameters of the target battery do not reach the battery parameter threshold.

[0103] Specifically, if the target device is being charged, the first threshold is not reached if the average voltage of at least one individual battery is less than the first threshold; if the target device is being discharged, the first threshold is not reached if the average voltage of at least one individual battery is greater than the first threshold.

[0104] By acquiring and calculating the average voltage of individual cells in the target battery, the average voltage of individual cells in the target battery can be made to meet the user-set threshold for average individual cell voltage, thus ensuring that the battery parameters of the target battery meet the user's requirements.

[0105] In the second scenario: the battery parameter threshold can be a threshold set for the extreme value of a single cell voltage (hereinafter referred to as the second threshold). In this case, the specific process of monitoring the battery parameters of the target battery can include the following steps B1 to B4:

[0106] B1. Obtain the voltage of each individual cell in at least one cell.

[0107] For an explanation of step B1, please refer to the description of step A1 above, which will not be repeated here.

[0108] B2. Determine the voltage extreme value of at least one individual cell based on the voltage of each individual cell.

[0109] The voltage extreme value can be either the maximum or minimum voltage, depending on the target user's settings. When the user sets the battery parameter threshold to the maximum voltage, the highest voltage among the individual cells can be determined as the voltage extreme value for at least one individual cell. When the user sets the battery parameter threshold to the minimum voltage, the lowest voltage among the individual cells can be determined as the voltage extreme value for at least one individual cell.

[0110] B3. If the voltage extreme value of at least one individual cell reaches the second threshold, determine that the battery parameters of the target battery have reached the battery parameter threshold.

[0111] Specifically, if the target device is being charged, the first threshold is reached when the voltage extreme value of the at least one individual battery is greater than or equal to the second threshold; if the target device is being discharged, the second threshold is reached when the voltage extreme value of the at least one individual battery is less than or equal to the second threshold.

[0112] B4. If the voltage extreme value of at least one individual cell does not reach the second threshold, determine that the battery parameters of the target battery have reached the battery parameter threshold.

[0113] Specifically, if the target device is being charged, the first threshold is not reached when the voltage extreme value of the at least one individual battery is less than the second threshold; if the target device is being discharged, the second threshold is not reached when the voltage extreme value of the at least one individual battery is greater than the second threshold.

[0114] By acquiring and determining the extreme voltage values ​​of individual cells in the target battery, it is possible to ensure that the extreme voltage values ​​of individual cells in the target battery match the extreme battery voltage values ​​set by the user, thus ensuring that the battery parameters of the target battery meet the user's requirements.

[0115] The third scenario: If the battery parameter threshold can be a threshold set for the total voltage of a single cell (hereinafter referred to as the third threshold), then the specific process of monitoring the battery parameters of the target battery can include the following steps C1 to C4:

[0116] C1. Obtain the voltage of each individual cell in at least one individual cell.

[0117] C2. Determine the total voltage of at least one individual cell based on the voltage of each individual cell.

[0118] The formula for calculating the total voltage is as follows:

[0119]

[0120] CVsum For the total voltage, CV i The voltage of the i-th cell selected by the user, and n is the number of cells selected by the user.

[0121] C3. If the total voltage of at least one individual cell reaches the third threshold, determine that the battery parameters of the target battery have reached the battery parameter threshold.

[0122] Specifically, if the target device is being charged, the third threshold is reached when the sum of the voltages of the at least one individual battery cell is greater than or equal to the third threshold; if the target device is being discharged, the third threshold is reached when the average voltage of the at least one individual battery cell is less than or equal to the third threshold.

[0123] C4. If the total voltage of at least one individual cell does not reach the third threshold, it is determined that the battery parameters of the target battery do not reach the battery parameter threshold.

[0124] Specifically, if the target device is being charged, the third threshold is not reached if the total voltage of the at least one individual battery is less than the third threshold; if the target device is being discharged, the third threshold is not reached if the total voltage of the at least one individual battery is greater than the third threshold.

[0125] By acquiring and calculating the total voltage of individual cells in the target battery, it is possible to ensure that the total voltage of individual cells in the target battery meets the user-set threshold value for individual cells, thus ensuring that the battery parameters of the target battery meet the user's requirements.

[0126] Battery parameter thresholds are not limited to the above-mentioned cases. Other battery parameters can also be used as battery parameters to be monitored, and corresponding thresholds can be set as battery parameter thresholds. This application does not impose any restrictions. For example, the minimum remaining charge can also be used as a battery parameter to be monitored.

[0127] Multiple battery parameters can be selected as the parameters to be monitored simultaneously, and threshold settings can be set. For example, the average and extreme values ​​of the individual cell voltages mentioned above can be selected as the battery parameters to be monitored, and battery parameter thresholds can be set. When multiple battery parameters are selected as the battery parameters to be monitored and each battery parameter has its own threshold, the target battery parameter is determined to have reached its respective threshold.

[0128] The following description uses battery parameter thresholds, including the aforementioned first threshold and second threshold, as an example. The specific process of monitoring the battery parameters of the target battery can include the following steps D1 to D5.

[0129] D1. Obtain the voltage of each individual cell in at least one cell.

[0130] D2. Calculate the average voltage of at least one individual cell based on the voltage of each individual cell.

[0131] D3. Determine the voltage extreme value of at least one individual cell based on the voltage of each individual cell.

[0132] D4. If the average voltage of at least one cell reaches a first threshold and the extreme voltage of at least one cell reaches a second threshold, the battery parameters of the target battery are determined to have reached the battery parameter threshold.

[0133] D5. If the average voltage of at least one individual cell does not reach the first threshold, or the extreme voltage of at least one individual cell does not reach the second threshold, it is determined that the battery parameters of the target battery do not reach the battery parameter threshold.

[0134] During the aforementioned charging or discharging process of the target device, the target device can be charged or discharged using any of the following methods:

[0135] (1) Based on constant current control: that is, the charging current remains constant during the charging process, or the discharging current remains constant during the discharging process.

[0136] (2) Pulse control based method: that is, intermittent charging during the charging process or intermittent discharging during the discharging process.

[0137] (3) Based on step-down method: that is, during the charging process, a step-like charging current is used for charging, and the end of each step corresponds to a cutoff voltage; or during the discharging process, a step-like discharging current is used for discharging, and the end of each step corresponds to a cutoff voltage.

[0138] (4) Based on constant voltage control: that is, charging is performed with a constant voltage until the cutoff current is reached during the charging process, or discharging is performed with a constant voltage until the cutoff current is reached during the discharging process.

[0139] (5) Based on constant current constant voltage (CCCV) control: that is, during the charging process, the battery is charged with a constant current to the cutoff voltage, and then continues to be charged with a constant voltage to the cutoff current; or during the discharging process, the battery is discharged with a constant current to the cutoff voltage, and then continues to be discharged with a constant battery to the cutoff current.

[0140] During the charging or discharging of the target device using the methods described in (4) or (5) above, when the battery parameter threshold is the voltage threshold (including but not limited to the first threshold, the second threshold, and the third threshold) in any of the aforementioned cases, after the voltage of the target battery reaches the voltage threshold, a constant voltage control method must be used to continue charging or discharging the target device until the total current of the power battery system of the target device is less than or equal to the preset current threshold, at which point charging or discharging of the target device will stop. Since charging or discharging or discharging using a constant voltage control method after the voltage of the target battery reaches the voltage threshold will not change the voltage of the target battery, the voltage of the target battery can be maintained at the set voltage threshold. The preset current threshold can be pre-set and stored in the charging and discharging device, for example, it can be 0.05C, that is, the preset current threshold is 0.05 times the nominal capacity of the power battery system; the preset current threshold can also be set by the target user. When the preset current threshold is set by the user, the aforementioned user instruction can also include the preset current threshold. When obtaining the user instruction, the user-set preset current threshold also needs to be obtained.

[0141] When the target battery reaches the voltage threshold set by the user, the target device is charged or discharged using a constant voltage control method until the total current of the target device's power battery system is less than the preset current threshold, which enables the target battery to meet the user's needs. Through constant voltage charging, the voltage of the target battery can be accurately maintained at the set voltage threshold, which helps to calibrate the remaining capacity of the target device's power battery system.

[0142] The method of this application has been described above; the apparatus of this application will be described below.

[0143] See Figure 5 , Figure 5 This is a schematic diagram of a charge / discharge control device provided in an embodiment of this application. This charge / discharge control device is applied to the aforementioned charge / discharge device 102 or cloud platform 103. For example... Figure 5 As shown, the charge / discharge control device 30 includes:

[0144] The battery data acquisition module 301 is used to acquire battery data of at least one single cell in the power battery system of the target device in response to charging and discharging commands.

[0145] The battery determination module 302 is used to determine the target battery that requires precise charge and discharge control from the at least one individual battery based on the battery data of the at least one individual battery.

[0146] The parameter monitoring module 303 is used to charge or discharge the target device and monitor the battery parameters of the target battery.

[0147] The control module 304 is used to stop charging or discharging the target device when the battery parameters of the target battery reach the battery parameter threshold of the target battery.

[0148] In one possible design, the battery determination module 302 is specifically used to: output battery data of the at least one individual battery and obtain a first user instruction set by the user based on the battery data of the at least one individual battery; and determine the target battery from the at least one individual battery that requires precise control of charging and discharging according to the first user instruction.

[0149] In one possible design, the parameter monitoring module 303 is further configured to: acquire a second user instruction set by the user based on the target battery settings, and determine the battery parameter threshold according to the second user instruction.

[0150] In one possible design, the parameter monitoring module 303 is further configured to: set the safety threshold of the target battery to the battery parameter threshold when the battery parameter threshold determined by the second user instruction does not meet the preset parameter conditions.

[0151] In one possible design, the parameter monitoring module 303 is further configured to: determine the battery parameter threshold based on the current battery data of the target battery and the initial battery data of the target battery.

[0152] In one possible design, the battery data acquisition module 301 is specifically used to: acquire battery data of at least one single cell in the power battery system of the target device through a vehicle communication interface or a cloud platform.

[0153] In one possible design, the battery parameter thresholds include a first threshold, and / or a second threshold, and / or a third threshold, wherein: the first threshold is a threshold set for the average voltage of a single battery cell; the second threshold is a threshold set for the extreme voltage of a single battery cell; and the third threshold is a threshold set by the target user for the total voltage of a single battery cell.

[0154] In one possible design, the battery parameter thresholds include a voltage threshold; the charging and discharging module 302 is specifically used to: charge or discharge the target device using a constant voltage control method when the voltage of the target battery reaches the voltage threshold, until the total current of the power battery system is less than or equal to a preset current threshold.

[0155] In one possible design, the charging / discharging module 302 is further configured to determine the charging / discharging process parameters of the target battery, the charging / discharging process parameters including the duration of the target battery from the current battery parameter value to the battery parameter threshold, and the charging / discharging parameters for charging or discharging the target device; and generate a battery detection result of the target battery based on the charging / discharging process parameters, the battery detection result being used to indicate the health status of the target battery.

[0156] It should be noted that, Figure 5 For any content not mentioned in the corresponding embodiments, please refer to the description of the foregoing method embodiments, which will not be repeated here.

[0157] The aforementioned device, upon receiving a charge / discharge command and acquiring battery data from at least one individual battery in the power battery system of the target device, first identifies the target battery requiring precise charge / discharge control based on the battery data of the at least one individual battery. Then, it charges or discharges the target device and detects the battery parameters of the target battery. When the battery parameters of the target battery reach the target battery parameter threshold, it stops charging or discharging the target battery. This allows the battery parameters of the target battery to be controlled within the set battery parameter threshold, achieving precise control of the battery parameters of the target battery in the power battery system of the target device. The battery can meet the control requirements without disassembling it, thus improving the maintenance and testing efficiency of the power battery system in the target device.

[0158] See Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. The computer device can be a charging and discharging device 102 or a cloud platform 103. The computer device 40 includes a processor 401, a memory 402, and a communication interface 403. The memory 402 and the communication interface 403 are connected to the processor 401, for example, via a bus.

[0159] Processor 401 is configured to support the computer device 40 in performing the corresponding functions in the methods described in the above method embodiments. Processor 401 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The aforementioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0160] Memory 402 is used to store program code, etc. Memory 402 may include volatile memory (VM), such as random access memory (RAM); memory 402 may also include non-volatile memory (NVM), such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); memory 402 may also include combinations of the above types of memory.

[0161] The communication interface 403 is used to acquire battery data from the power battery system of the target device under the instruction of the processor 401. The communication interface 403 can be a hardware interface, such as a USB interface; or it can be a software interface, such as a Bluetooth interface or a WiFi interface. It is not limited to these limitations.

[0162] Optionally, the computer device 40 may also include an input interface 404 and / or an output interface 405. The input interface 404 can be used to acquire user commands, and the input interface may include, for example, a touch screen, buttons, etc. The output interface 405 is used to output charging and discharging related data to the user, such as charging and discharging parameters, and can also be used to indicate the charging and discharging status. The output interface 405 may include, for example, a display, a buzzer, or an indicator light.

[0163] Processor 401 can call the program code to perform the following operations:

[0164] In response to charging and discharging commands, acquire battery data of at least one individual cell in the power battery system of the target device;

[0165] Based on the battery data of the at least one individual battery, determine the target battery from the at least one individual battery that requires precise control of charging and discharging;

[0166] The target device is charged or discharged, and the battery parameters of the target battery are monitored.

[0167] When the battery parameters of the target battery reach the target battery parameter threshold, charging or discharging of the target device is stopped.

[0168] This application also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, which, when executed by a computer, cause the computer to perform the method described in the foregoing embodiments.

[0169] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0170] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A charging and discharging control method, characterized in that, A charging and discharging device is applied to a target communication system, the target communication system further including an electric vehicle, a vehicle communication interface, and a cloud platform. The communication interface of the charging and discharging device is connected to the communication interface of the electric vehicle through the vehicle communication interface, and the charging and discharging interface of the charging and discharging device is connected to the charging and discharging interface of the electric vehicle. The cloud platform is connected to both the vehicle communication interface and the charging and discharging device. The method includes: In response to charging and discharging commands, the battery data of at least one individual battery in the power battery system of the electric vehicle is obtained through the vehicle communication interface or the cloud platform. Based on the battery data of the at least one individual battery, determine the target battery from the at least one individual battery that requires precise control of charging and discharging; The electric vehicle is charged or discharged, and the battery parameters of the target battery are monitored. If the battery parameters of the target battery reach the target battery parameter threshold, stop charging or discharging the electric vehicle. The method further includes: obtaining the target battery parameter peak value closest to the current time in historical time as the current battery data of the target battery; obtaining the target battery parameter peak value farthest from the current time in historical time as the initial battery data of the target battery; determining the peak ratio between the current battery data and the initial battery data; and multiplying the peak ratio by an ideal battery parameter threshold to determine the battery parameter threshold of the target battery, wherein the ideal battery parameter threshold is the battery parameter threshold corresponding to the battery parameter under ideal conditions.

2. The method according to claim 1, characterized in that, The step of determining the target battery requiring precise charge and discharge control from the at least one individual battery based on the battery data of the at least one individual battery includes: Output the battery data of the at least one individual battery cell, and obtain the first user instruction set by the user based on the battery data of the at least one individual battery cell; Based on the first user instruction, a target battery requiring precise charge and discharge control is determined from the at least one individual battery cell.

3. The method according to claim 1, characterized in that, Before stopping the charging or discharging of the electric vehicle, the method further includes: Obtain a second user instruction based on the target battery settings, and determine the battery parameter threshold according to the second user instruction.

4. The method according to claim 3, characterized in that, The method further includes: If the battery parameter threshold determined by the second user instruction does not meet the preset parameter conditions, the safety threshold of the target battery is set to the battery parameter threshold.

5. The method according to claim 1, characterized in that, Before stopping the charging or discharging of the electric vehicle, the method further includes: The battery parameter threshold is determined based on the current battery data and the initial battery data of the target battery.

6. The method according to any one of claims 1-5, characterized in that, The battery parameter thresholds include a first threshold, and / or a second threshold, and / or a third threshold, wherein: The first threshold is a threshold set for the average voltage of a single battery cell; The second threshold is a threshold set for the extreme value of a single cell voltage; The third threshold is a threshold set for the total voltage of a single battery cell.

7. The method according to any one of claims 1-5, characterized in that, The battery parameter thresholds include voltage thresholds; Charging or discharging the electric vehicle includes: When the voltage of the target battery reaches the voltage threshold, the electric vehicle is charged or discharged using a constant voltage control method until the total current of the power battery system is less than or equal to a preset current threshold.

8. The method according to any one of claims 1-5, characterized in that, After stopping the charging or discharging of the electric vehicle, the method further includes: Determine the charging and discharging process parameters of the target battery, including the duration of the target battery from the current battery parameter value to the battery parameter threshold, and the charging and discharging parameters for charging or discharging the electric vehicle. Based on the charging and discharging process parameters, a battery detection result for the target battery is generated, and the battery detection result is used to indicate the health status of the target battery.

9. A charging and discharging control device, characterized in that, A charging and discharging device is applied to a target communication system, the target communication system further including an electric vehicle, a vehicle communication interface, and a cloud platform. The communication interface of the charging and discharging device is connected to the communication interface of the electric vehicle through the vehicle communication interface, and the charging and discharging interface of the charging and discharging device is connected to the charging and discharging interface of the electric vehicle. The cloud platform is connected to both the vehicle communication interface and the charging and discharging device. The charging and discharging control device includes: A battery data acquisition module is used to acquire battery data of at least one single cell in the power battery system of the electric vehicle in response to charging and discharging commands. A battery determination module is used to determine, based on the battery data of the at least one individual battery, a target battery from the at least one individual battery that requires precise control of charging and discharging. The parameter monitoring module is used to charge or discharge the electric vehicle and monitor the battery parameters of the target battery. The control module is used to stop charging or discharging the electric vehicle when the battery parameters of the target battery reach the battery parameter threshold of the target battery. The parameter monitoring module is further configured to obtain the target battery parameter peak value closest to the current time in historical time as the current battery data of the target battery, obtain the target battery parameter peak value farthest from the current time in historical time as the initial battery data of the target battery, determine the peak ratio between the current battery data and the initial battery data, and multiply the peak ratio by the ideal battery parameter threshold to determine the battery parameter threshold of the target battery, wherein the ideal battery parameter threshold is the battery parameter threshold corresponding to the battery parameter under ideal conditions.

10. A computer device, characterized in that, The device includes a memory, a processor, and a communication interface, wherein the memory and the communication interface are connected to the processor, and the processor is configured to execute one or more computer programs stored in the memory, wherein when the processor executes the one or more computer programs, the computer device causes the computer device to perform the method as described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions that, when executed by a processor, cause the processor to perform the method as described in any one of claims 1-8.

12. A target communication system, the target communication system comprising an electric vehicle, a vehicle communication interface, a cloud platform, and the charging / discharging device, wherein the communication interface of the charging / discharging device is connected to the communication interface of the electric vehicle through the vehicle communication interface, the charging / discharging interface of the charging / discharging device is connected to the charging / discharging interface of the electric vehicle, the cloud platform is connected to both the vehicle communication interface and the charging / discharging device, the electric vehicle includes a power battery system, the power battery system includes at least one single cell, and the charging / discharging device has a charging / discharging control device as described in claim 9.

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