Method, computer program product, controller and vehicle for returning battery rtm data of a power battery after powering off a vehicle

Abstract

This application proposes a method for transmitting battery RTM data of a power battery after a vehicle is powered off. The method includes the following steps: a first data request step, executed when the vehicle is powered off, in which the vehicle's communication unit requests battery RTM data from a first controller of the vehicle with command authority over the battery management system to transmit the battery RTM data back to the background; and a battery interaction step, executed when there is no response to the request sent in the first data request step, in which the communication unit requests interaction from the vehicle's battery management system. This application also relates to corresponding computer program products, controllers, and vehicles. A particular advantage of this application is its ability to improve the transmission of battery RTM data.

Description

Technical Field

[0001] This application relates to a method for transmitting battery RTM (Real-Time Monitoring data) data from a power battery after a vehicle is powered off, a computer program product, a controller, and a vehicle. Background Technology

[0002] Currently, after a vehicle is powered off, it typically does not transmit RTM data to the backend. Instead, it transmits one RTM data point between 59 minutes and 30 seconds and one hour after power loss. However, thermal runaway of the power battery is more likely to occur immediately after the vehicle is powered off, therefore the current process for transmitting RTM data needs improvement. Summary of the Invention

[0003] The purpose of this application is to provide a method for transmitting battery RTM data of the power battery after the vehicle is powered off, and in particular to improve the transmission of battery RTM data.

[0004] According to a first aspect of this application, a method is provided for transmitting battery RTM data of a power battery after a vehicle is powered off, the method comprising the following steps: The first data request step is executed when the vehicle finishes powering off. In the first data request step, the vehicle's communication unit requests battery RTM data from the first controller of the vehicle that has command authority over the battery management system in order to send the battery RTM data back to the background. The battery interaction step is executed when there is no response to the request sent in the first data request step. In the battery interaction step, the communication unit requests interaction from the vehicle's battery management system.

[0005] According to an optional embodiment of this application, the battery interaction step includes a battery handshake step, in which the communication unit requests a handshake from the battery management system.

[0006] According to an optional embodiment of this application, the battery interaction step includes a second data request step, in which the communication unit requests battery RTM data from the battery management system.

[0007] According to an optional embodiment of this application, the method includes a contactor handshake step, in which the communication unit requests a handshake from the high-voltage contactor of the vehicle.

[0008] According to an optional embodiment of this application, the method includes a contactor disconnection step, in which the communication unit sends a disconnection command to the high-voltage contactor of the vehicle to place the high-voltage contactor in an open state, wherein the high-voltage contactor disconnects the high-voltage line of the vehicle in the open state.

[0009] According to an optional embodiment of this application, the method includes a regular backhaul step, in which the communication unit continuously backhauls the received battery RTM data to the background within a preset regular backhaul time, wherein the preset regular backhaul time is in particular 5 minutes.

[0010] According to an optional embodiment of this application, the method includes a first alarm step, which is executed when there is no response to the interaction request sent in the battery interaction step. In the first alarm step, the communication unit sends a first alarm signal to the user terminal, the rescue terminal, and / or the background.

[0011] According to an optional embodiment of this application, the method includes a controller handshake step, in which the communication unit continuously requests a handshake from the first controller for a preset request time.

[0012] According to an optional embodiment of this application, when there is no response to the request sent in the first data request step, the battery handshake step and the contactor handshake step are executed; When the battery handshake step receives a response, the second data request step and the regular return step are executed. If there is no response during the battery handshake step, the first alarm step is executed. When the battery handshake step does not respond but the contactor handshake step does, the contactor disconnect step is executed; or when the battery handshake step does not respond but the contactor handshake step does, the controller handshake step is executed. When the controller handshake step does respond, the communication unit requests the first controller to disconnect the high-voltage contactor.

[0013] According to an optional embodiment of this application, when there is no response to the request sent in the first data request step, the battery handshake step is executed; When the battery handshake step receives a response, the second data request step and the regular return step are executed. If there is no response during the battery handshake step, execute the first alarm step and / or one of the following: - The controller handshake step is executed. When the controller handshake step receives a response, the communication unit requests the first controller to disconnect the high-voltage contactor. - Perform the contactor disconnection step; - Perform the contactor handshake step, and when there is a response to the contactor handshake step, perform the contactor disconnect step.

[0014] According to an optional embodiment of this application, when there is no response to the request sent in the first data request step, the second data request step is executed; When the second data request step receives a response, the routine return step is executed; If there is no response in the second data request step, execute the first alarm step and / or one of the following: - The controller handshake step is executed. When the controller handshake step receives a response, the communication unit requests the first controller to disconnect the high-voltage contactor. - Perform the contactor disconnection step; - Perform the contactor handshake step, and when there is a response to the contactor handshake step, perform the contactor disconnect step.

[0015] According to an optional embodiment of this application, the method includes a temperature monitoring step, which is performed within a preset normal return time. In the temperature monitoring step, the communication unit monitors the temperature data in the received battery RTM data. When the battery temperature is determined to be abnormal based on the temperature data, the communication unit sends a temperature alarm signal to the user terminal and / or executes a temperature alarm mode. In the temperature alarm mode, within a preset temperature alarm time, the communication unit requests battery RTM data and continuously returns the received battery RTM data to the background until the real-time battery temperature returns to normal or a temperature alarm cancellation signal is received from the user to cancel the temperature alarm.

[0016] According to an optional embodiment of this application, if the real-time battery temperature in the temperature data exceeds the battery temperature received last under normal operating conditions when the battery is not charging, the battery temperature is determined to be abnormal.

[0017] According to an optional embodiment of this application, in the charging state, if the real-time battery temperature in the temperature data exceeds the temperature alarm threshold and shows an upward trend, the battery temperature is determined to be abnormal.

[0018] According to an optional embodiment of this application, the preset temperature alarm time is 3 minutes.

[0019] According to an optional embodiment of this application, if the real-time battery temperature in the temperature data is still abnormal or no temperature alarm cancellation signal is received when the preset temperature alarm time ends, the contactor disconnection step is executed or the communication unit requests the first controller to disconnect the high-voltage contactor.

[0020] According to an optional embodiment of this application, the method includes a single-cell voltage monitoring step, which is performed within a preset normal return time. In the single-cell voltage monitoring step, the communication unit monitors the single-cell voltage data in the received battery RTM data. When a single-cell voltage is determined to be abnormal based on the single-cell voltage data, the communication unit sends a voltage alarm signal to the user terminal and / or executes a voltage alarm mode. In the voltage alarm mode, within a preset voltage alarm time, the communication unit requests battery RTM data and continuously returns the received battery RTM data to the background until the single-cell voltage returns to normal or a voltage alarm cancellation signal is received from the user to cancel the voltage alarm.

[0021] According to an optional embodiment of this application, for each battery RTM data in the last predetermined number of battery RTM data received within a preset normal return time, the difference between the maximum value and the minimum value of the single cell voltage is calculated and the maximum value of the difference is determined. If the maximum value of the difference exceeds the maximum value of the single cell voltage difference under normal operating conditions, the single cell voltage is determined to be abnormal. The predetermined number is in particular less than or equal to 20, and in particular 10.

[0022] According to an optional embodiment of this application, the preset voltage alarm time is 3 minutes.

[0023] According to an optional embodiment of this application, if the voltage of a single unit is still abnormal or no voltage alarm cancellation signal is received when the preset voltage alarm time ends, a contactor disconnection step is performed or the communication unit requests the first controller to disconnect the high-voltage contactor.

[0024] According to an optional embodiment of this application, the conventional return step is performed when there is a response to the request sent in the first data request step.

[0025] According to a second aspect of this application, a computer program product is provided, comprising computer program instructions that, when executed by one or more processors, enable the processors to perform the aforementioned method for transmitting battery RTM data of the power battery after the vehicle is powered off.

[0026] According to a third aspect of this application, a controller is provided, the controller including a processor and a memory, the memory storing computer program instructions, which, when executed by the processor, enable the processor to perform the aforementioned method for transmitting battery RTM data of the power battery after the vehicle is powered off, the controller being particularly the vehicle's TCU (Telematics Control Unit).

[0027] According to a fourth aspect of this application, a communication unit is provided, the communication unit including the aforementioned controller, the communication unit being particularly a T-Box (Telematics Box, vehicle-mounted remote communication terminal).

[0028] According to a fifth aspect of this application, a vehicle is provided, the vehicle including the aforementioned controller or including the aforementioned communication unit.

[0029] At least in some embodiments, the positive effects of this application are: it can continuously transmit battery RTM data and provide early warning of thermal runaway during the high-risk period of thermal runaway immediately after the power battery is powered off; as a redundancy scheme, the communication unit can directly request interaction from the battery management system when communication with the first controller that has command authority over the battery management system fails; it can identify the thermal runaway risk of the power battery in terms of temperature and / or individual cell voltage; and it can remedy the situation where the high-voltage contactor does not disconnect immediately or the high-voltage contactor fails to disconnect. Attached Figure Description

[0030] The principles, features, and advantages of this application will be better understood below with reference to the accompanying drawings. The drawings include: Figure 1 An example of the vehicle of this application is illustrated in the schematic diagram; Figure 2 An example of a vehicle's architecture is illustrated in the diagram. Figure 3 This illustration schematically shows a first example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 4 This illustration schematically shows a second example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 5 A third example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off is illustrated schematically. Figure 6 The illustration shows a fourth example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 7 The illustration shows a fifth example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 8 The illustration shows a sixth example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 9The illustration shows a seventh example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off; Figure 10 An eighth example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off is illustrated schematically. Figure 11 The illustration schematically shows a ninth example of the method of this application for transmitting battery RTM data of the power battery after the vehicle is powered off.

[0031] List of reference numerals 100 Communication unit, 101 Battery management system, 102 First controller, 103 Power battery, 104 High voltage contactor, 105 Battery disconnection unit, 106 Motor controller, 107 Drive motor; 300 First data request step, 310 Battery interaction step, 311 Battery handshake step, 312 Second data request step, 321 Contactor handshake step, 322 Contactor disconnection step, 330 Normal feedback step, 340 First alarm step, 350 Controller handshake step, 360 Temperature monitoring step, 370 Individual cell voltage monitoring step. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit the scope of protection of this application.

[0033] Figure 1 An example of the vehicle described in this application is illustrated in the diagram. The vehicle may be, for example, a pure electric vehicle or a hybrid vehicle.

[0034] like Figure 1 As shown, the vehicle may have a communication unit 100, a first controller 102, and a battery management system 101.

[0035] The communication unit 100 may be, for example, a vehicle's T-Box. The communication unit 100 can perform remote communication, such as with user terminals, rescue terminals, and / or back-end systems. User terminals are particularly users' mobile phones. Rescue terminals are particularly mobile phones used by rescue teams. Remote communication with user terminals or rescue terminals may involve communicating with applications on the terminal or sending text messages to the terminal. Back-end systems are particularly enterprise cloud platforms or national regulatory platforms.

[0036] The first controller 102 can be, for example, the vehicle's onboard computer, or a CDCC (Central Driving and Charging Controller) or a VCU (Vehicle Control Unit). The first controller 102 has command authority over the battery management system 101, that is, it can send control commands to the battery management system 101.

[0037] like Figure 1 As shown, on the high-voltage line indicated by the thick black line, the vehicle may have a power battery 103, a high-voltage contactor 104, and a drive motor 107.

[0038] The high-voltage contactor 104 is, for example, subordinate to the vehicle's battery disconnection unit 105 and controlled by the controller of the battery disconnection unit 105.

[0039] Figure 2 A schematic diagram illustrates an example of a vehicle's architecture. Here, high-voltage lines are represented by thick black lines, and the vehicle's CAN bus is indicated by boxes marked with shading. A gateway, not shown, is also present on the CAN bus.

[0040] like Figure 2 As shown, the communication unit 100, the first controller 102, the battery management system 101, the battery disconnection unit 105, and the motor controller 106 of the drive motor 107 are connected to the CAN line, for example.

[0041] Replaced Figure 2 Theoretically, it is also possible that these components, or a portion thereof, are connected via other types of buses or wirelessly, or to... Figure 2 Different connections are linked together.

[0042] Figure 3 This illustration shows a first example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off.

[0043] like Figure 3 As shown, the method includes the following steps: The first data request step 300 is executed when the vehicle finishes powering off. In the first data request step 300, the vehicle's communication unit 100 requests battery RTM data from the vehicle's first controller 102, which has command authority over the battery management system 101, to send the battery RTM data back to the background. Battery interaction step 310: When there is no response to the request sent in the first data request step 300, battery interaction step 310 is executed. In battery interaction step 310, the communication unit 100 requests interaction from the vehicle's battery management system 101.

[0044] Through the above methods, the following technical effects are achieved: the battery RTM data continues to be transmitted after power-off, instead of only transmitting one RTM data point from 59 minutes and 30 seconds to 1 hour after power-off, thus effectively monitoring the high-risk period when the power battery is first powered off; when communication with the first controller 102, which has command authority over the battery management system 101, fails, as a redundancy solution, the communication unit 100 can directly request interaction from the battery management system 101, thereby effectively improving the robustness of the system.

[0045] To achieve the above method, it is conceivable that after the vehicle's high voltage is cut off, the communication unit 100, the first controller 102, and the battery management system 101 can continue to operate by being powered by a low-voltage battery. This low-voltage battery can be the vehicle's 12-volt or 48-volt low-voltage battery or a dedicated battery specifically designed for these components.

[0046] According to an exemplary embodiment of this application, such as Figure 3 As shown, the method includes a routine backhaul step 330, in which the communication unit 100 continuously transmits the received battery RTM data back to the backend within a preset routine backhaul time. The preset routine backhaul time is specifically 5 minutes.

[0047] exist Figure 3 For example, when a response is received to the request sent in the first data request step 300, the regular return step 330 is executed. The process can be as follows: After the vehicle is powered off, the communication unit 100 continues to request battery RTM data from the first controller 102. In response, the first controller 102 transmits the battery RTM data obtained from the battery management system 101 to the communication unit 100. The communication unit 100 then sends the received battery RTM data back to the backend. For example, the communication unit 100 continuously transmits battery RTM data to the backend for 5 minutes at a rate of one data point per minute. If no problems occur during this period, the communication unit 100 can send a stop power supply signal to the low-voltage battery when the preset normal return time has elapsed, so that the low-voltage battery stops supplying power. Before the low-voltage battery receives the stop power supply signal, the low-voltage battery will continue to supply power to the communication unit 100 and other related components.

[0048] Figure 4 This illustration shows a second example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off.

[0049] According to an exemplary embodiment of this application, such as Figure 4As shown, battery interaction step 310 includes a battery handshake step 311, in which the communication unit 100 requests a handshake from the battery management system 101. When requesting a handshake, the communication unit 100 sends, for example, an empty packet interaction command without commands, or a handshake command, to the battery management system 101. Compared to interaction commands with commands, handshake commands receive a response much faster.

[0050] According to an exemplary embodiment of this application, such as Figure 4 As shown, the battery interaction step 310 includes a second data request step 312, in which the communication unit 100 requests battery RTM data from the battery management system 101.

[0051] The second data request step 312 is performed, for example, as follows: The communication unit 100 requests data access permission from the battery management system 101. The battery management system 101 verifies whether communication with the first controller 102 has been lost. If so, the battery management system 101 grants data access permission to the communication unit 100. At this time, the communication unit 100 can directly request battery RTM data from the battery management system 101.

[0052] According to an exemplary embodiment of this application, such as Figure 4 As shown, the method includes a contactor handshake step 321, in which the communication unit 100 requests a handshake from the high-voltage contactor 104 of the vehicle.

[0053] According to an exemplary embodiment of this application, such as Figure 4 As shown, the method includes a contactor disconnection step 322, in which the communication unit 100 sends a disconnection command to the high-voltage contactor 104 of the vehicle, causing the high-voltage contactor 104 to be placed in an open state. In the open state, the high-voltage contactor 104 disconnects the high-voltage line of the vehicle. The high-voltage line disconnection is specifically understood herein as the disconnection of the power battery 103 from the high-voltage line.

[0054] In many current fire cases, the high-voltage contactor 104 failed to disconnect or did not disconnect immediately after the vehicle's high-voltage power was cut off, leading to overheating and fire. The methods described above can effectively improve vehicle safety after power is cut off.

[0055] Contactor disconnection step 322 is performed, for example, as follows: Communication unit 100 requests permission to disconnect high-voltage contactor 104 from battery disconnection unit 105. Battery disconnection unit 105 verifies whether communication between first controller 102 and battery management system 101 has been lost. If so, battery disconnection unit 105 grants permission to disconnect high-voltage contactor 104 to communication unit 100. At this time, communication unit 100 can send a disconnection command to battery disconnection unit 105, which then disconnects high-voltage contactor 104. The disconnection command can be, for example, a set command, such as a set command that sets the bit to 0 (0 indicates that high-voltage contactor 104 is disconnected). Regardless of the previous state of high-voltage contactor 104, battery disconnection unit 105 disconnects high-voltage contactor 104 according to the set command.

[0056] According to an exemplary embodiment of this application, the method includes a first alarm step 340, which is executed when there is no response to the interaction request sent in the battery interaction step 310. In the first alarm step 340, the communication unit 100 sends a first alarm signal to the user terminal, the rescue terminal, and / or the background. Figure 4 In the middle, if there is no response to the request sent in the battery handshake step 311, the first alarm step 340 is executed.

[0057] The communication unit 100 can send alerts to an application on the user's mobile phone or send text messages to the user's mobile phone. The communication unit 100 can also send text messages to a dedicated number of the rescue team. The communication unit 100 can also send alerts to a backend system, which then forwards the alerts to the user or the rescue team.

[0058] according to Figure 4 For example, the method has the following flow: If there is no response to the request sent in the first data request step 300, execute the battery handshake step 311 and the contactor handshake step 321. When there is a response in the battery handshake step 311, the second data request step 312 and the normal return step 330 are executed.

[0059] If there is no response in battery handshake step 311, execute the first alarm step 340; If there is no response in battery handshake step 311 but a response in contactor handshake step 321, then execute contactor disconnect step 322.

[0060] According to an exemplary embodiment of this application, such as Figure 4As shown, the method includes a temperature monitoring step 360, which is executed within a preset normal return time. In the temperature monitoring step 360, the communication unit 100 monitors the temperature data in the received battery RTM data. When the battery temperature is determined to be abnormal based on the temperature data, the communication unit 100 sends a temperature alarm signal to the user terminal and / or executes a temperature alarm mode. In the temperature alarm mode, within a preset temperature alarm time, the communication unit 100 requests battery RTM data and continuously returns the received battery RTM data to the background until the real-time battery temperature returns to normal or a temperature alarm cancellation signal is received from the user to cancel the temperature alarm.

[0061] For example, the preset temperature alarm time is 3 minutes. During the preset temperature alarm time, the communication unit 100 continuously transmits battery RTM data, for example, at a frequency of once every 10 seconds.

[0062] Instead of having the communication unit 100 directly monitor the temperature data, it is also conceivable that the temperature data be monitored by the backend, with the communication unit 100 indirectly monitoring the temperature data by obtaining the monitoring results from the backend.

[0063] According to an exemplary embodiment of this application, in a non-charging state, if the real-time battery temperature in the temperature data exceeds the battery temperature last received under normal operating conditions, the battery temperature is determined to be abnormal.

[0064] According to an exemplary embodiment of this application, in the charging state, if the real-time battery temperature in the temperature data exceeds the temperature alarm threshold and shows an upward trend, the battery temperature is determined to be abnormal.

[0065] According to an exemplary embodiment of this application, if the real-time battery temperature in the temperature data is still abnormal or no temperature alarm cancellation signal is received when the preset temperature alarm time ends, the contactor disconnection step 322 is executed or the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104.

[0066] It can be envisioned that when there is no response to the request sent in the first data request step 300, the contactor disconnection step 322 is executed; when there is a response to the request sent in the first data request step 300, the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104. Compared with the communication unit 100, the first controller 102 has a higher safety level and is more suitable for issuing disconnection commands to the high-voltage contactor 104.

[0067] According to an exemplary embodiment of this application, such as Figure 4As shown, the method includes a single-cell voltage monitoring step 370. This step is performed within a preset normal transmission time. In this step, the communication unit 100 monitors the single-cell voltage data in the received battery RTM data. When a single-cell voltage is determined to be abnormal based on the single-cell voltage data, the communication unit 100 sends a voltage alarm signal to the user terminal and / or executes a voltage alarm mode. In the voltage alarm mode, within a preset voltage alarm time, the communication unit 100 requests battery RTM data and continuously transmits the received battery RTM data back to the background until the single-cell voltage returns to normal or a voltage alarm cancellation signal is received from the user to cancel the voltage alarm.

[0068] For example, the preset voltage alarm time is 3 minutes. During the preset voltage alarm time, the communication unit 100 continuously transmits battery RTM data, for example, at a frequency of once every 10 seconds.

[0069] Instead of having the communication unit 100 directly monitor the individual cell voltage data, it is also conceivable that the background can monitor the individual cell voltage data, and the communication unit 100 can indirectly monitor the individual cell voltage data by obtaining the monitoring results from the background.

[0070] According to an exemplary embodiment of this application, for each battery RTM data point in the last predetermined number of battery RTM data points received within a preset normal return time, the difference between the maximum and minimum individual cell voltage values ​​is calculated, and the maximum difference value is determined. If the maximum difference value exceeds the maximum individual cell voltage difference value under normal operating conditions, the individual cell voltage is determined to be abnormal. Exemplarily, the predetermined number is particularly less than or equal to 20, and particularly 10. For example, the difference is calculated for each of the last 10 received battery RTM data points, and then the maximum difference value is selected from the 10 obtained differences. If this maximum difference value is greater than the maximum individual cell voltage difference value under normal operating conditions, the individual cell voltage is determined to be abnormal.

[0071] According to an exemplary embodiment of this application, if the voltage of a single unit is still abnormal or no voltage alarm cancellation signal is received when the preset voltage alarm time ends, the contactor disconnection step 322 is executed or the communication unit 100 requests the first controller 102 to disconnect the high voltage contactor 104.

[0072] Similarly, it can be envisioned that when there is no response to the request sent in the first data request step 300, the contactor disconnection step 322 is executed; when there is a response to the request sent in the first data request step 300, the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104.

[0073] Figure 5 A third example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off is illustrated schematically. Figure 5 Zhongyu Figure 4 The same parts will not be repeated.

[0074] According to an exemplary embodiment of this application, such as Figure 5 As shown, the method includes a controller handshake step 350, in which the communication unit 100 continuously requests a handshake from the first controller 102 within a preset request time.

[0075] For example, the preset request time is 3 minutes. Within the preset request time, for example, 3 minutes, the communication unit 100 requests a handshake with the first controller 102 at a frequency of once every 10 seconds.

[0076] According to an exemplary embodiment of this application, such as Figure 5 As shown, when there is no response in the battery handshake step 311 but a response in the contactor handshake step 321, the controller handshake step 350 is executed. When there is a response in the controller handshake step 350, the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104.

[0077] Figure 6 A fourth example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off is illustrated schematically.

[0078] according to Figure 6 For example, the method has the following flow: If there is no response to the request sent in the first data request step 300, execute the battery handshake step 311; When there is a response in battery handshake step 311, execute the second data request step 312 and the normal return step 330. If there is no response in battery handshake step 311, execute the first alarm step 340 and controller handshake step 350. When the controller handshake step 350 receives a response, the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104.

[0079] Alternatively, if there is no response in battery handshake step 311, only the first alarm step 340 can be executed.

[0080] Figure 7 This illustration schematically shows a fifth example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off.

[0081] and Figure 6 The difference lies in Figure 7 In the process, if there is no response in the battery handshake step 311, the first alarm step 340 and the contactor disconnection step 322 are executed.

[0082] Figure 8 The illustration shows a sixth example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off.

[0083] and Figure 6 and Figure 7 The difference lies in Figure 8 In the process, if there is no response in the battery handshake step 311, the first alarm step 340 and the contactor handshake step 321 are executed. If there is a response in the contactor handshake step 321, the contactor disconnection step 322 is executed.

[0084] Figure 9 The illustration shows a seventh example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off.

[0085] according to Figure 9 For example, the method has the following flow: If there is no response to the request sent in the first data request step 300, the second data request step 312 is executed. When the second data request step 312 receives a response, execute the regular data return step 330. If there is no response in the second data request step 312, execute the first alarm step 340 and the controller handshake step 350. When the controller handshake step 350 receives a response, the communication unit 100 requests the first controller 102 to disconnect the high-voltage contactor 104.

[0086] Figure 10 An eighth example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off is illustrated schematically.

[0087] and Figure 9 The difference lies in Figure 10 In the process, if there is no response in the second data request step 312, the first alarm step 340 and the contactor disconnection step 322 are executed.

[0088] Figure 11 A ninth example of the method of this application for transmitting battery RTM data of the power battery 103 after the vehicle is powered off is illustrated schematically.

[0089] and Figure 9 and Figure 10 The difference lies in Figure 11 In the process, if there is no response in the second data request step 312, the first alarm step 340 and the contactor handshake step 321 are executed. If there is a response in the contactor handshake step 321, the contactor disconnect step 322 is executed.

[0090] In the accompanying drawings and specific embodiments, the method steps are presented in a specific order. However, this should be understood as merely an example and not a mandatory requirement. Where feasible in principle, the order of these method steps can be arbitrarily changed or can be performed in overlapping time without exceeding the scope of protection of this application. Furthermore, for the sake of brevity, some method steps are described only in one specific embodiment, but if feasible in principle, these method steps can also be incorporated into other specific embodiments without exceeding the scope of disclosure of this application.

[0091] Ordinal numbers such as "first" and "second" are used only to avoid confusion between element names and do not indicate the order of importance between elements or that elements are interdependent.

[0092] In the attached diagram, "Y" indicates "Yes" and specifically represents a response, and "N" indicates "No" and specifically represents "No response".

[0093] Provided that it is permissible in principle, each of the cited features can be considered as an individual feature and can be combined with any other feature in any form without departing from the scope of protection of this application. If it is permissible in principle, even if not explicitly stated, a feature described for one embodiment should be considered as being arbitrarily applicable to other embodiments.

[0094] Although specific embodiments of this application are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of this application. Various substitutions, modifications, and alterations can be conceived without departing from the spirit and scope of this application.

Claims

1. A method for transmitting battery RTM data of a power battery after a vehicle is powered off, characterized in that, The method includes the following steps: The first data request step (300) is executed when the vehicle finishes powering off. In the first data request step (300), the vehicle's communication unit (100) requests battery RTM data from the vehicle's first controller (102) which has command authority over the battery management system (101) to send the battery RTM data back to the background. Battery interaction step (310): When there is no response to the request sent in the first data request step (300), the battery interaction step (310) is executed. In the battery interaction step (310), the communication unit (100) requests interaction from the vehicle's battery management system (101).

2. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 1, is characterized in that, The method includes at least one of the following features: The battery interaction step (310) includes a battery handshake step (311), in which the communication unit (100) requests a handshake from the battery management system (101). The battery interaction step (310) includes a second data request step (312), in which the communication unit (100) requests battery RTM data from the battery management system (101); The method includes a contactor handshake step (321), in which the communication unit (100) requests a handshake from the high-voltage contactor (104) of the vehicle. The method includes a contactor disconnection step (322), in which the communication unit (100) sends a disconnection command to the high-voltage contactor (104) of the vehicle to put the high-voltage contactor (104) into a disconnected state. In the disconnected state, the high-voltage contactor (104) disconnects the high-voltage line of the vehicle. The method includes a routine backhaul step (330), in which the communication unit (100) continuously backhauls the received battery RTM data to the background within a preset routine backhaul time, wherein the preset routine backhaul time is in particular 5 minutes. The method includes a first alarm step (340), which is executed when there is no response to the interaction request sent in the battery interaction step (310). In the first alarm step (340), the communication unit (100) sends a first alarm signal to the user terminal, the rescue terminal and / or the background. The method includes a controller handshake step (350), in which the communication unit (100) continuously requests a handshake from the first controller (102) within a preset request time.

3. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 2, is characterized in that... When there is no response to the request sent in the first data request step (300), the battery handshake step (311) and the contactor handshake step (321) are executed. When there is a response in the battery handshake step (311), the second data request step (312) and the regular return step (330) are executed. If there is no response in the battery handshake step (311), the first alarm step (340) is executed. When there is no response in the battery handshake step (311) but there is a response in the contactor handshake step (321), the contactor disconnect step (322) is executed; or when there is no response in the battery handshake step (311) but there is a response in the contactor handshake step (321), the controller handshake step (350) is executed; when there is a response in the controller handshake step (350), the communication unit (100) requests the first controller (102) to disconnect the high-voltage contactor (104).

4. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 2, is characterized in that... If there is no response to the request sent in the first data request step (300), the battery handshake step (311) is executed. When there is a response in the battery handshake step (311), the second data request step (312) and the regular return step (330) are executed. If there is no response in the battery handshake step (311), execute the first alarm step (340) and / or one of the following: The controller handshake step (350) is executed. When the controller handshake step (350) receives a response, the communication unit (100) requests the first controller (102) to disconnect the high-voltage contactor (104). Perform the contactor disconnection step (322); The contactor handshake step (321) is executed. When there is a response to the contactor handshake step (321), the contactor disconnect step (322) is executed.

5. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 2, is characterized in that... If there is no response to the request sent in the first data request step (300), the second data request step (312) is executed. When the second data request step (312) receives a response, the regular return step (330) is executed. If there is no response in the second data request step (312), execute the first alarm step (340) and / or one of the following: The controller handshake step (350) is executed. When the controller handshake step (350) receives a response, the communication unit (100) requests the first controller (102) to disconnect the high-voltage contactor (104). Perform the contactor disconnection step (322); The contactor handshake step (321) is executed. When there is a response to the contactor handshake step (321), the contactor disconnect step (322) is executed.

6. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, according to any one of claims 2 to 5, characterized in that, The method includes a temperature monitoring step (360). The temperature monitoring step (360) is performed within the preset normal return time. In the temperature monitoring step (360), the communication unit (100) monitors the temperature data in the received battery RTM data. When the battery temperature is determined to be abnormal based on the temperature data, the communication unit (100) sends a temperature alarm signal to the user terminal and / or the communication unit (100) executes a temperature alarm mode. In the temperature alarm mode, within the preset temperature alarm time, the communication unit (100) requests battery RTM data and continuously returns the received battery RTM data to the background until the real-time battery temperature returns to normal or a temperature alarm cancellation signal is received from the user to cancel the temperature alarm.

7. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 6, is characterized in that... The method includes at least one of the following features: If the real-time battery temperature in the temperature data exceeds the battery temperature received last under normal operating conditions when the battery is not charging, the battery temperature is determined to be abnormal. If, during charging, the real-time battery temperature in the temperature data exceeds the temperature alarm threshold and shows an upward trend, the battery temperature is determined to be abnormal. The preset temperature alarm time is 3 minutes; If the real-time battery temperature in the temperature data is still abnormal or no temperature alarm cancellation signal is received when the preset temperature alarm time ends, the contactor disconnection step (322) is executed or the communication unit (100) requests the first controller (102) to disconnect the high-voltage contactor (104).

8. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, according to any one of claims 2 to 5, characterized in that, The method includes a single-cell voltage monitoring step (370). The single-cell voltage monitoring step (370) is performed within a preset normal return time. In the single-cell voltage monitoring step (370), the communication unit (100) monitors the single-cell voltage data in the received battery RTM data. When the single-cell voltage is determined to be abnormal based on the single-cell voltage data, the communication unit (100) sends a voltage alarm signal to the user terminal and / or the communication unit (100) executes a voltage alarm mode. In the voltage alarm mode, within a preset voltage alarm time, the communication unit (100) requests battery RTM data and continuously returns the received battery RTM data to the background until the single-cell voltage returns to normal or a voltage alarm cancellation signal is received from the user to cancel the voltage alarm.

9. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, as described in claim 8, is characterized in that... The method includes at least one of the following features: For each battery RTM data in the last predetermined number of battery RTM data received within the preset normal return time, calculate the difference between the maximum value and the minimum value of the single cell voltage and determine the maximum value of the difference. If the maximum value of the difference exceeds the maximum value of the single cell voltage difference under normal operating conditions, the single cell voltage is determined to be abnormal. The predetermined number is in particular less than or equal to 20, and in particular 10. The preset voltage alarm time is 3 minutes; If the voltage of a single unit is still abnormal or no voltage alarm cancellation signal is received when the preset voltage alarm time ends, the contactor disconnection step (322) is executed or the communication unit (100) requests the first controller (102) to disconnect the high voltage contactor (104).

10. The method for transmitting battery RTM data of the power battery after the vehicle is powered off, according to any one of claims 2 to 5, characterized in that, When there is a response to the request sent in the first data request step (300), the regular return step (330) is executed.

11. A computer program product, characterized in that, It includes computer program instructions that, when executed by one or more processors, enable the processors to perform a method according to any one of claims 1 to 10 for transmitting battery RTM data of the power battery after the vehicle is powered off.

12. A controller, characterized in that, The controller includes a processor and a memory, the memory storing computer program instructions. When the computer program instructions are executed by the processor, the processor is capable of performing a method according to any one of claims 1 to 10 for transmitting battery RTM data of the power battery after the vehicle is powered off. The controller is particularly the TCU of the vehicle.

13. A communication unit, characterized in that, The communication unit (100) includes the controller according to claim 12, and the communication unit (100) is in particular a T-Box.

14. A vehicle, characterized in that, The vehicle includes the controller according to claim 12 or the communication unit according to claim 13.

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