Battery state detection system and method, electronic device, medium and program product

Abstract

The invention relates to a battery state detection system and method, electronic equipment, a medium and a program product. The system comprises a control unit and at least one battery state detection device, each battery state detection device is in communication connection with the control unit through a single-sided half-word transmission protocol SENT signal line, and the control unit comprises a SENT signal decoding assembly; the battery state detection device sends detected battery state data to the control unit through an SENT signal line; the control unit decodes the battery state data through the SENT signal decoding assembly to determine the thermal runaway state of the battery. Therefore, the inherent SENT signal decoding assembly in the control unit is adopted, the thermal runaway state of the battery can be determined after the battery state data is directly analyzed, a decoder for communication data does not need to be additionally deployed, and the structural complexity and the system cost of the system are reduced.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to a battery state detection system, method, electronic device, medium, and program product. Background Technology

[0002] With the continuous advancement of electric vehicle technology, vehicle power battery status monitoring systems, as part of battery energy storage systems, are receiving increasing attention. Research on these monitoring systems is therefore highly significant in order to better monitor the status of power batteries and ensure the safe and stable output of battery packs.

[0003] In the field of electric vehicle power batteries, monitoring battery thermal runaway is a key design focus. However, existing detection solutions for battery thermal runaway are costly. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a battery state detection system, method, electronic device, medium, and program product.

[0005] According to a first aspect of the present disclosure, a battery state detection system is provided, comprising: a control unit and at least one battery state detection device, each of the battery state detection devices being communicatively connected to the control unit via a Single-sided Half-Word Transmission Protocol (SENT) signal line, the control unit including a SENT signal decoding component; the battery state detection device being configured to send detected battery state data to the control unit via the SENT signal line; the control unit being configured to decode the battery state data via the SENT signal decoding component to determine the thermal runaway state of the battery.

[0006] Using the above system, each battery status detection device sends the detected battery status data to the control unit via the SENT signal line. Thus, the control unit's built-in SENT signal decoding component can directly parse the battery status data to determine the battery's thermal runaway state, eliminating the need for an additional communication data decoder. Compared to CAN communication, this eliminates the need for CAN decoders in the battery status detection devices and control unit, reducing system complexity and cost.

[0007] In some possible implementations, when the target device containing the battery is in a dormant state, in response to an abnormal state of the battery, the battery state detection device is further configured to send a wake-up message to the control unit via the SENT signal line, the wake-up message being used to wake up the control unit.

[0008] Using this implementation method, the SENT signal line can also be used to promptly wake up the control unit when the battery status is abnormal. That is, the SENT signal line can be used to transmit both battery status data and wake-up information, avoiding the need for a separate hardwired connection for transmitting wake-up information, reducing the wiring harness connection between the battery status detection device and the control unit, and lowering the probability of data transmission failures.

[0009] In some possible implementations, the battery state detection device includes a first controller and a first switching device connected to the first controller, the first switching device also being connected to the SENT signal line; in response to an abnormal battery state, the first controller is configured to control the SENT signal line via the first switching device to send the wake-up information to the control unit.

[0010] By deploying the first switching device in the battery status detection device using this implementation method, a wake-up message can be sent to the control unit via the SENT signal line, so that the control unit can be woken up in time to provide an abnormal status warning when an abnormal battery status is detected.

[0011] In some possible implementations, in response to an abnormal state of the battery, the battery state detection device is further configured to switch from a first operating mode to a second operating mode, wherein the detection frequency of the battery state detection device in the first operating mode is less than the detection frequency in the second operating mode.

[0012] By adopting this implementation method, when the battery state is determined to be abnormal, the working mode of the battery state detection device can be adjusted in a timely manner to increase the detection frequency of the battery state data when the battery state is abnormal. This allows for timely and accurate calibration and verification of the battery's thermal runaway state, thereby improving the reliability of the battery thermal runaway state monitoring results.

[0013] In some possible implementations, the control unit includes a second controller and a second switching device connected to the second controller, the second switching device also being connected to the SENT signal line; the second controller is configured to control the SENT signal line via the second switching device to send a mode switching command to each of the battery state detection devices, the mode switching command being used to instruct the battery state detection device to switch its operating mode, the different operating modes corresponding to different detection frequencies.

[0014] By adopting this implementation method, and by improving the architecture of the control unit, a second switching device connected to the SENT signal line is provided in the control unit. This allows the control unit to switch the working mode of the battery status detection device through the SENT signal line, eliminating the need for a dedicated hardwired design for transmitting mode switching commands and reducing the number of wiring harnesses.

[0015] In some possible implementations, in response to the target device containing the battery switching from a sleep state to a non-sleep state, the second controller is configured to control the SENT signal line via the second switching device to send a first mode switching instruction to each of the battery state detection devices. The first mode switching instruction is used to instruct the battery state detection device to switch from a first operating mode to a second operating mode, wherein the detection frequency corresponding to the first operating mode is lower than the detection frequency corresponding to the second operating mode.

[0016] Using this implementation method, when the target device is determined to be switched to a non-sleep state, the battery status detection device can be controlled to switch to the second working mode via the SENT signal line, without the need to introduce other hard wires to transmit the mode switching command.

[0017] In some possible implementations, the battery state detection device is configured to send detected battery state data to the control unit via the SENT signal line when in the second operating mode.

[0018] In some possible implementations, in response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller is configured to control the SENT signal line via the second switching device to send a second mode switching command to each of the battery state detection devices. The second mode switching command is used to instruct the battery state detection device to switch from a second operating mode to a first operating mode, wherein the detection frequency corresponding to the first operating mode is lower than the detection frequency corresponding to the second operating mode.

[0019] Using this implementation method, when the target device is determined to be switched to a sleep state, the battery status detection device can be controlled to switch to the first operating mode (i.e., low power mode) via the SENT signal line, without the need to introduce other hard lines to transmit the mode switching command.

[0020] In some possible implementations, the battery status detection device is further configured to send the operating status data of the battery status detection device obtained from self-test to the control unit via the SENT signal line; the control unit is further configured to decode the operating status data via the SENT signal decoding component to determine whether the operating status of the battery status detection device is abnormal.

[0021] By employing this implementation method and utilizing the SENT signal decoding component inherent in the control unit, it is also possible to decode the operating status data of the battery status detection device, thereby enabling the monitoring of the operating status of the battery status detection device.

[0022] In some possible implementations, the battery state detection device includes a thermal runaway sensor, and the control unit includes a battery management controller; the thermal runaway sensor is configured to detect gas information within the battery pack of the battery and transmit the gas information to the battery management controller via the SENT signal line, the gas information being used to determine the thermal runaway state.

[0023] According to a second aspect of the present disclosure, a battery state detection method is provided, applied to a battery state detection system, the system comprising: a control unit and at least one battery state detection device; each battery state detection device is communicatively connected to the control unit via a Single-sided Half-Word Transmission Protocol (SENT) signal line, the control unit including a SENT signal decoding component; the method comprising: sending battery state data detected by each battery state detection device to the control unit via the SENT signal line; and decoding the battery state data via the SENT signal decoding component to determine the thermal runaway state of the battery.

[0024] In some possible implementations, the method further includes: when the target device containing the battery is in a dormant state, in response to an abnormal state of the battery, the battery state detection device sends a wake-up message to the control unit via the SENT signal line, the wake-up message being used to wake up the control unit.

[0025] In some possible implementations, the battery state detection device includes a first controller and a first switching device connected to the first controller, the first switching device also being connected to the SENT signal line; the battery state detection device sending wake-up information to the control unit via the SENT signal line includes: in response to an abnormal battery state, the first controller controls the SENT signal line via the first switching device to send the wake-up information to the control unit.

[0026] In some possible implementations, the control unit includes a second controller and a second switching device connected to the second controller, the second switching device also being connected to the SENT signal line; the method further includes: the second controller controlling the SENT signal line via the second switching device to send a mode switching command to each of the battery state detection devices, the mode switching command being used to instruct the battery state detection device to switch its operating mode, the different operating modes corresponding to different detection frequencies.

[0027] In some possible implementations, the second controller, through the second switching device, controls the SENT signal line to send a mode switching command to each of the battery state detection devices, including: in response to the target device containing the battery switching from a sleep state to a non-sleep state, the second controller, through the second switching device, controls the SENT signal line to send a first mode switching command to each of the battery state detection devices, the first mode switching command being used to instruct the battery state detection device to switch from a first operating mode to a second operating mode, the detection frequency corresponding to the first operating mode being lower than the detection frequency corresponding to the second operating mode.

[0028] In some possible implementations, sending the battery status data detected by each battery status detection device to the control unit via the SENT signal line includes: for each battery status detection device, when the battery status detection device is in the second operating mode, sending the detected battery status data to the control unit via the SENT signal line.

[0029] In some possible implementations, the second controller, through the second switching device, controls the SENT signal line to send a mode switching command to each of the battery state detection devices, including: in response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller, through the second switching device, controls the SENT signal line to send a second mode switching command to each of the battery state detection devices, the second mode switching command being used to instruct the battery state detection device to switch from a second operating mode to a first operating mode, the detection frequency corresponding to the first operating mode being lower than the detection frequency corresponding to the second operating mode.

[0030] In some possible implementations, the method further includes: sending the operating status data of the battery status detection device obtained by self-test to the control unit through the SENT signal line; and decoding the operating status data through the SENT signal decoding component to determine whether the operating status of the battery status detection device is abnormal.

[0031] In some possible implementations, the battery state detection device includes a thermal runaway sensor, and the control unit includes a battery management controller; the step of sending battery state data detected by each of the battery state detection devices to the control unit via the SENT signal line includes: the thermal runaway sensor detecting gas information within the battery pack of the battery and sending the gas information to the battery management controller via the SENT signal line, wherein the gas information is used to determine the thermal runaway state.

[0032] According to a third aspect of the present disclosure, an electronic device is provided, including the battery status detection system provided in the first aspect of the present disclosure.

[0033] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of the battery state detection method provided in the second aspect of the present disclosure.

[0034] According to a fifth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described in the second aspect of the present disclosure.

[0035] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: Each battery state detection device sends the detected battery state data to the control unit via the SENT signal line. Thus, by using the SENT signal decoding component inherent in the control unit, the battery state data can be directly parsed to determine the battery's thermal runaway state, eliminating the need for an additional communication data decoder. Compared to CAN communication, this eliminates the need for a CAN decoder in the battery state detection device and control unit, reducing the system's structural complexity and cost.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0038] Figure 1 This is a structural block diagram of a battery state detection system according to an exemplary embodiment.

[0039] Figure 2 It is based on Figure 1 The illustrated embodiment presents a structural block diagram of a battery state detection system.

[0040] Figure 3This is a block diagram of a battery state detection system based on SENT communication, according to an exemplary embodiment.

[0041] Figure 4 It is based on Figure 1 The illustrated embodiment presents a structural block diagram of another battery state detection system.

[0042] Figure 5 This is a flowchart illustrating a battery state detection method according to an exemplary embodiment.

[0043] Figure 6 It is based on Figure 5 The illustrated embodiment shows a flowchart of a battery state detection method.

[0044] Figure 7 It is based on Figure 5 The illustrated embodiment shows a flowchart of a battery state detection method.

[0045] Figure 8 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0047] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0048] This disclosure is primarily applied to scenarios involving the detection of thermal runaway states in power batteries, particularly for thermal runaway monitoring of power batteries in multi-bank battery structures.

[0049] Currently, the industry commonly uses sensors (i.e., thermal runaway sensors) installed within the battery pack to detect gas pressure or signals within the battery compartment, identifying abnormal gas pressure for early thermal runaway warnings. When the vehicle is in sleep mode, the thermal runaway sensor enters a low-power mode; when the vehicle is not in sleep mode, it enters a full-speed detection mode. There are two architectures for this thermal runaway sensor: one is to install the sensor within the cell compartment based on the application; the other is to integrate the gas pressure sensor onto the battery management controller board in the electrical compartment. For dual-bank battery systems with physical gas isolation between the compartments, or battery systems where the electrical compartment and cell compartment (where the battery management controller is located) are gas-isolated, the gas pressure sensor on the battery management system board cannot be used. Instead, a gas pressure or gas signal identification sensor installed within the cell compartment is required for thermal runaway detection.

[0050] The main functions of a thermal runaway sensor system include detecting gas pressure or composition, and waking up the vehicle to notify the battery management system if an anomaly is detected during vehicle sleep mode. The thermal runaway sensor interacts with the battery management system only with gas information and fault information from the detection system; that is, the overall functional requirements of the detection system are simple. Currently, thermal runaway sensors used in the industry all employ CAN communication and hard-wired sleep / wake-up schemes. Specifically, the thermal runaway sensor transmits gas information within the battery pack and sensor fault status information to the battery management controller via the CAN communication bus. However, this presents the following problems: First, in order to support CAN communication, a CAN decoder chip needs to be placed on the battery management controller that interfaces with the sensor. Furthermore, for a dual-bank battery system, two CAN decoder chips are required. However, CAN chips are complex and expensive, and placing these CAN decoder chips will increase the cost of the detection system.

[0051] Secondly, during the vehicle's dormant phase, the thermal runaway sensor detects abnormal gas pressure or excessive levels of abnormal gas components within the battery pack, waking up the battery management controller via hardwired connections. When the vehicle switches to the non-dormant phase, the battery management controller requires additional wiring to send a mode switching request (from low-power mode to full-speed detection mode) to the thermal runaway sensor in each battery bank. Therefore, the CAN communication-based thermal runaway sensor detection system provided in related technologies has a complex sensor product design, involving many design modules, complex structures, and numerous wiring harnesses, making its technical complexity significantly higher than that of gas pressure sensors. Furthermore, for dual-battery systems, a single sensor requires at least six inputs and outputs, increasing the probability of failure and leading to high system costs.

[0052] To address the aforementioned problems, this disclosure provides a battery state detection system, method, electronic device, medium, and program product. The specific embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0053] Figure 1 This is a structural block diagram of a battery state detection system according to an exemplary embodiment, such as... Figure 1 As shown, the system 100 includes: The control unit 101 and at least one battery status detection device 102 are provided. Each battery status detection device 102 is connected to the control unit 101 via a SENT (Single Edge Nibble Transmission) signal line. The control unit 101 includes a SENT signal decoding component 1011, which is an inherent component of the control unit 101 and does not require additional configuration.

[0054] The control unit 101 may include, for example, a battery management controller. The battery state detection device 102 may include a thermal runaway sensor, which is a sensor deployed in the cell compartment of each BANK in the battery pack. The thermal runaway sensor can determine the thermal runaway state of the battery by detecting the gas pressure and / or gas composition in the cell compartment.

[0055] It is understood that for a dual-BANK battery system, the battery state detection system 100 may include two battery state detection devices 102.

[0056] In this disclosure, the battery status data collected by each battery status detection device 102 can be transmitted to the control unit 101 via the SENT signal line.

[0057] The battery status detection device 102 is configured to send the detected battery status data to the control unit 101 via the SENT signal line.

[0058] The battery status data may include gas pressure and / or gas composition data within the battery compartment. The battery status detection device 102 can encode the detected battery status data into a set of SENT protocol information and then transmit it to the control unit 101.

[0059] Control unit 101 is configured to decode the battery state data via SENT signal decoding component 1011 to determine the thermal runaway state of the battery.

[0060] This thermal runaway state is used to characterize whether the battery has experienced thermal runaway, and it can also characterize the severity of the thermal runaway.

[0061] In this disclosure, the control unit 101 can decode the received SENT protocol information through the SENT signal decoding component 1011 to determine the battery status data, and then determine whether the battery has thermal runaway based on the parsed battery status data.

[0062] For example, the battery state detection device 102 includes a thermal runaway sensor, and the control unit 101 includes a battery management controller; the battery state data includes gas information within the battery pack. The thermal runaway sensor is configured to detect gas information within the battery pack, encode the gas information into SENT protocol information, and transmit it to the battery management controller via the SENT signal line. This gas information is used to determine the thermal runaway state of the battery.

[0063] In one embodiment, the battery status data includes gas pressure data inside the battery housing. Since the internal pressure of the battery increases with the generation of gas during thermal runaway, causing the battery to expand, the control unit 101 can determine that the battery has experienced thermal runaway when it determines that the gas pressure inside the battery housing is abnormal (such as the gas pressure being greater than or equal to a preset pressure threshold).

[0064] In another embodiment, the battery status data includes gas composition data within the battery casing. During battery thermal runaway, a large amount of gas, such as hydrogen and carbon monoxide, is generated inside the battery. The release of these gases is an important indicator of thermal runaway. Therefore, if the control unit 101 determines that the battery has experienced thermal runaway, it can determine that the gas composition within the battery casing is abnormal (e.g., the gas composition includes hydrogen and / or carbon monoxide).

[0065] In another embodiment, the battery status data includes gas pressure data and gas composition data within the battery casing. Thus, if the control unit 101 determines that both the gas pressure and gas composition within the battery casing are abnormal, it can determine that the battery has experienced thermal runaway.

[0066] Furthermore, the battery status detection device 102 in this disclosure can also be configured to send the operating status data of the battery status detection device 102 obtained from self-test to the control unit 101 via the SENT signal line; in this way, the control unit 101 can also be configured to decode the operating status data via the SENT signal decoding component 1011 to determine whether the operating status of the battery status detection device 102 is abnormal.

[0067] The operational status data indicates whether the battery status detection device 102 itself is malfunctioning. Each battery status detection device 102 can self-test to obtain this operational status data, encode it into a set of SENT protocol information, and send it to the control unit 101 via the SENT signal line. The control unit 101 parses the received SENT protocol information based on the SENT signal decoding component 1011 to obtain the operational status data, and further determines the operational status of the battery status detection device 102 based on this data. When a fault is determined in the battery status detection device 102, a corresponding fault code can be generated to provide a fault indication.

[0068] The control unit 101 may also include a second controller, which may be, for example, an MCU (Microcontroller Unit). It should be noted that for the MCU, the SENT signal decoding component 1011 is an inherent component. Therefore, by using the industry-standard SENT signal protocol to transmit battery status data—a hardwired information that the MCU can directly receive—the battery management controller directly uses the SENT signal decoding component within the MCU to parse the battery status data, eliminating the need for an additional communication decoder design. This reduces the structural complexity and production cost of the detection system.

[0069] For example, Figure 3 This is a block diagram illustrating a battery state detection system based on SENT communication, according to an exemplary embodiment. Figure 3 As shown, this battery has a dual-bank structure, with a thermal runaway sensor installed in each bank. Figure 3 Line A in the diagram is the SENT signal line. Figure 3 Taking the thermal runaway sensor 1 shown as an example, the thermal runaway sensor 1 includes an MCU (i.e., the first controller below) and a first switching device connected to the MCU. The MCU in the thermal runaway sensor 1 further includes a gas pressure and composition detection module and a SENT coding module. The gas pressure and composition detection module detects the battery state data, and the SENT coding module codes the battery state data and transmits it through the SENT signal line (i.e., the first controller below). Figure 3 The data is transmitted via line A to the battery management controller. The MCU (i.e., the "second controller" hereinafter) in the battery management controller decodes the received battery status data using its inherent SENT signal decoding component. Based on the air pressure verification module, it can further determine the thermal runaway state of the battery. The above example is merely illustrative and is not intended to limit the scope of this disclosure.

[0070] Using the above system, each battery status detection device sends the detected battery status data to the control unit via the SENT signal line. The control unit can then directly parse this battery status data to determine the battery's thermal runaway state without the need for an additional communication data decoder. Compared to CAN communication, eliminating the CAN decoder in both the battery status detection device and the control unit reduces the system's structural complexity and cost.

[0071] In one embodiment of this disclosure, when the target device containing the battery is in a dormant state, in response to an abnormal state of the battery, the battery state detection device 102 is further configured to send a wake-up message to the control unit via the SENT signal line, the wake-up message being used to wake up the control unit 101.

[0072] The target device may include, for example, a vehicle or a terminal device. If the target device is a vehicle, the battery is the vehicle's power battery; if the target device is a terminal device, the battery is the terminal device's battery.

[0073] Abnormal battery status here may include, for example, the detected gas pressure in the battery compartment being greater than or equal to a preset pressure threshold, and / or the gas composition in the battery compartment including preset gas components (such as hydrogen, carbon monoxide, etc.).

[0074] Taking a vehicle as an example, the battery status detection device 102 is a thermal runaway sensor, and the control unit 101 is a battery management controller. When the vehicle is in a dormant state, the thermal runaway sensor typically operates in a low-power mode. In this low-power mode, the thermal runaway sensor performs low-frequency detection of gas data within the battery compartment. If the detected battery status data is normal, it does not need to send the battery status data to the battery management controller in real time, thus saving power. In this low-power mode, when the thermal runaway sensor detects an abnormal battery status, it can first send a wake-up message to the battery management controller via the SENT signal line. This wake-up message is used to wake up the battery management controller, so that after waking up the battery management controller, the vehicle controller process can be further activated for thermal runaway warning.

[0075] Therefore, this disclosure also enables the timely wake-up of the control unit 101 when the battery status is abnormal via the SENT signal line. It should be noted that in actual operating conditions, the battery status data and the wake-up information usually do not need to be transmitted simultaneously. Therefore, the SENT signal line can be used to transmit both the battery status data and the wake-up information. This avoids the need for a separate hardwired connection for transmitting the wake-up information, reduces the wiring harness connection between the battery status detection device and the control unit, and lowers the probability of data transmission failures.

[0076] Figure 2 It is based on Figure 1 The illustrated embodiment presents a structural block diagram of a battery state detection system, as shown below. Figure 2 As shown, each battery state detection device 102 further includes a first controller 1021 and a first switching device 1022 connected to the first controller 1021. The first switching device 1022 is also connected to the SENT signal line. Thus, in response to an abnormal battery state, the first controller 1021 can be configured to control the SENT signal line via the first switching device 1022 to send the wake-up information to the control unit 101. The wake-up information may, for example, be a high-level signal transmitted to the battery management controller on the SENT signal line.

[0077] For example, such as Figure 3 As shown, for each thermal runaway sensor, the thermal runaway sensor includes an MCU (i.e., a first controller) and a first switching device connected to the MCU. The first switching device is connected to the A line (i.e., the SENT signal line) via a D-line, and the other end of the first switching device is connected to a 12V power supply. Thus, when the MCU determines that the battery's state is abnormal, the MCU can control the first switching device to close, thereby pulling the signal transmitted on the SENT signal line high to 12V, and waking up the battery management controller through the high-level 12V signal transmitted on the SENT signal line. After waking up the battery management controller, the thermal runaway sensor can also control the first switching device to open via the MCU, thereby disconnecting from the 12V power supply. This example is merely illustrative and is not intended to limit the scope of this disclosure.

[0078] In another embodiment of this disclosure, in response to an abnormal state of the battery, the battery state detection device 102 is further configured to switch from a first operating mode to a second operating mode, wherein the detection frequency of the battery state detection device 102 in the first operating mode is less than the detection frequency in the second operating mode.

[0079] The first working mode can be understood as the low-power mode mentioned above, and the second working mode can be understood as the full-speed detection mode mentioned above.

[0080] When the target device is in a dormant state, the battery status detection device 102 typically operates in the first working mode. In this disclosure, while operating in the first working mode, the battery status detection device 102 detects the battery status at a preset low detection frequency. Upon detecting an abnormal battery status, it sends a wake-up message to the control unit 101 to wake it up for thermal runaway warning. Furthermore, in response to an abnormal battery status, this disclosure can automatically adjust the operating mode of the battery status detection device 102 from the first working mode to a second working mode. This increases the detection frequency of battery status data when a thermal runaway risk is identified (the abnormal battery status includes the risk of thermal runaway), thereby enabling timely and accurate calibration and verification of the battery's thermal runaway state and improving the reliability of the battery thermal runaway state monitoring results.

[0081] Figure 4 It is based on Figure 1 The illustrated embodiment shows a structural block diagram of another battery state detection system, as follows: Figure 4 As shown, the control unit 101 includes a second controller 1012 and a second switching device 1013 connected to the second controller 1012. The second switching device 1013 is also connected to the SENT signal line. Thus, the second controller 1012 can be configured to control the SENT signal line to send a mode switching command to each battery state detection device 102 through the second switching device 1013. The mode switching command is used to instruct the battery state detection device 102 to switch its operating mode. Different operating modes correspond to different detection frequencies.

[0082] As mentioned above, the operating mode of the battery status detection device 102 will differ depending on whether the target device is in a sleep state or not. In related technologies, separate hardwires need to be designed to enable the control unit 101 to switch the operating mode of each battery status detection device 102. However, this also results in too many wires and a complex detection system structure.

[0083] Considering that the signal transmission of the SENT signal line is unidirectional, meaning it can only send data from the sensor side to the controller side, this disclosure improves the architecture of the control unit 101 to avoid introducing too many hardwired lines. This allows the control unit to switch the operating mode of the battery state detection device 102 via the SENT signal line.

[0084] like Figure 4 As shown, the second switching device 1013 can be deployed in the control unit 101. By controlling the on / off state of the second switching device 1013, the mode switching command can be sent to each battery state detection device 102.

[0085] In one implementation, in response to the target device containing the battery switching from a sleep state to a non-sleep state, the second controller 1012 is configured to control the SENT signal line to send a first mode switching command to each battery state detection device 102 via the second switching device 1013. The first mode switching command is used to instruct the battery state detection device 102 to switch from a first operating mode to a second operating mode, wherein the detection frequency corresponding to the first operating mode is lower than the detection frequency corresponding to the second operating mode.

[0086] The first mode switching instruction can be, for example, a high-level signal transmitted via the SENT signal line.

[0087] For example, taking a vehicle as an example, when the vehicle switches from a dormant state to a non-dormant state (such as when the vehicle is powered on), the thermal runaway sensor located in the battery pack compartment also needs to switch from a low-power mode to a full-speed detection mode. In this disclosure, the second controller 1012 can send the first mode switching command to each thermal runaway sensor via the SENT signal line to control the thermal runaway sensor to switch from a low-power mode to a full-speed detection mode. Figure 3 As shown, the MCU located on the power management controller is one type of the second controller 1012. When the power management module in the MCU determines that the vehicle is switching from a sleep state to a non-sleep state, it can send the first mode switching command to each thermal runaway sensor through the sensor mode management module, such as... Figure 3 As shown, the second switching device is connected to the MCU on the power management controller. One end of the second switching device is connected to the SENT signal line via the B line, and the other end is grounded. In this way, the MCU on the power management controller can control the second switching device to be in the off state, thereby making the level signal transmitted on the SENT signal line a high level signal. Each thermal runaway sensor responds to receiving the high level signal transmitted by the power management controller through the SENT signal line (a preset duration can be set, for example, the high level signal is received continuously for 1 second), and recognizes that the battery management controller has notified the thermal runaway sensor to enter the full-speed detection mode. At this time, the thermal runaway sensor responds to receiving the first mode switching command and controls it to switch its working mode to the full-speed detection mode.

[0088] It should also be noted that the battery state detection device 102 can be configured to send the detected battery state data to the control unit 101 via the SENT signal line when in the second operating mode. As mentioned above, the second operating mode corresponds to the full-speed detection mode of the thermal runaway sensor. In this full-speed detection mode, the thermal runaway sensor can monitor the battery state data normally according to a preset detection frequency and send the acquired battery state data to the control unit 101 via the SENT signal line.

[0089] In another implementation, in response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller 1012 can be configured to control the SENT signal line to send a second mode switching command to each battery state detection device 102 via the second switching device 1013. The second mode switching command is used to instruct the battery state detection device 102 to switch from a second working mode to a first working mode, where the detection frequency corresponding to the first working mode is lower than the detection frequency corresponding to the second working mode.

[0090] The second mode switching command can be, for example, a low-level signal transmitted via the SENT signal line.

[0091] For example, taking a vehicle as an example, when the vehicle switches from a non-dormant state to a dormant state (e.g., when the vehicle is powered off), the thermal runaway sensor located in the battery pack compartment also needs to switch from full-speed detection mode to low-power mode. In this disclosure, the second controller 1012 can send the second mode switching command to each thermal runaway sensor via the SENT signal line to control the thermal runaway sensor to switch from full-speed detection mode to low-power mode. Figure 3 As shown, the MCU located on the power management controller is one type of the second controller 1012. When the power management module in the MCU determines that the vehicle is switching from a non-sleep state to a sleep state, it can send the second mode switching command to each thermal runaway sensor through the sensor mode management module, such as... Figure 3As shown, the second switching device is connected to the MCU on the power management controller. One end of the second switching device is connected to the SENT signal line via the B line, and the other end is grounded. In this way, the MCU on the power management controller can control the second switching device to be in the closed state, thereby making the level signal transmitted on the SENT signal line a low level signal. After each thermal runaway sensor detects that the SENT signal is pulled low for a period of time (a preset duration can be set, such as 1 second), it recognizes that the battery management controller has notified the thermal runaway sensor to enter the low power mode. At this time, the thermal runaway sensor responds to the second mode switching command received, controls its operating mode to switch to the low power mode, and reduces the sensor's detection frequency in the low power mode to reduce the static power consumption of the whole vehicle.

[0092] Figure 5 This is a flowchart illustrating a battery state detection method according to an exemplary embodiment, which can be applied to, for example... Figure 1 The battery state detection system shown includes a control unit and at least one battery state detection device. Each battery state detection device is communicatively connected to the control unit via a Single-sided Half-Word Transmission Protocol (SENT) signal line. The control unit includes a SENT signal decoding component. The control unit may, for example, include a battery management controller. The battery state detection device may include a thermal runaway sensor, specifically a sensor deployed in the cell compartment of each battery pack. This thermal runaway sensor can determine the thermal runaway state of the battery by detecting the gas pressure and / or gas composition within its cell compartment.

[0093] like Figure 5 As shown, the method includes the following steps: In step S501, the battery status data detected by each battery status detection device is sent to the control unit via the SENT signal line.

[0094] The battery status data may include gas pressure and / or gas composition data within the battery compartment. The battery status detection device can encode the detected battery status data into a set of SENT protocol information and then transmit it to the control unit.

[0095] In this disclosure, for each battery state detection device, when the battery state detection device is in the second operating mode, the detected battery state data can be sent to the control unit through the SENT signal line. The second operating mode refers to the full-speed detection mode mentioned above, which is contrasted with the low-power operating mode (i.e., the first operating mode). The detection frequency of the battery state detection device in the full-speed operating mode is higher than that in the low-power mode.

[0096] In this disclosure, for each battery state detection device, when the battery state detection device is in the first operating mode (i.e., low power mode), the battery state data can usually be detected only at a reduced detection frequency. The battery state data may not be sent to the control unit. Only when the state of the battery is determined to be abnormal, a wake-up message is sent to the control unit so that the control unit can be woken up and a thermal runaway warning can be issued.

[0097] In one embodiment, the battery state detection device includes a thermal runaway sensor, and the control unit includes a battery management controller. Thus, during the execution of this step, the thermal runaway sensor detects gas information within the battery pack and sends the gas information to the battery management controller via the SENT signal line. The battery management controller can determine the thermal runaway state of the battery based on the gas information.

[0098] In step S502, the battery state data is decoded by the SENT signal decoding component to determine the thermal runaway state of the battery.

[0099] This thermal runaway state is used to characterize whether the battery has experienced thermal runaway, and it can also characterize the severity of the thermal runaway.

[0100] In this step, the control unit can decode the received SENT protocol information through the SENT signal decoding component to determine the battery status data, and then determine whether the battery has experienced thermal runaway based on the parsed battery status data.

[0101] In one embodiment, the battery status data includes gas pressure data inside the battery casing. Since the internal pressure of the battery increases with the generation of gas during thermal runaway, causing the battery to expand, the control unit can determine that the battery has experienced thermal runaway when it determines that the gas pressure inside the battery casing is abnormal (such as the gas pressure being greater than or equal to a preset pressure threshold).

[0102] In another embodiment, the battery status data includes gas composition data within the battery casing. During battery thermal runaway, a large amount of gas, such as hydrogen and carbon monoxide, is generated inside the battery. The release of these gases is an important indicator of thermal runaway. Therefore, if the control unit determines that the gas composition within the battery casing is abnormal (e.g., the gas composition includes hydrogen and / or carbon monoxide), it can determine that the battery has experienced thermal runaway.

[0103] In another embodiment, the battery status data includes gas pressure data and gas composition data within the battery casing. Thus, if the control unit determines that both the gas pressure and gas composition within the battery casing are abnormal, it can determine that the battery has experienced thermal runaway.

[0104] Furthermore, the battery status detection device in this disclosure can also send the operating status data of the battery status detection device obtained from self-test to the control unit via the SENT signal line; in this way, the control unit can also decode the operating status data through the SENT signal decoding component to determine whether the operating status of the battery status detection device is abnormal.

[0105] This operational status data indicates whether the battery status detection device itself is malfunctioning. Each battery status detection device can self-test to obtain this operational status data, encode it into a set of SENT protocol information, and then send it to the control unit via the SENT signal line. The control unit parses the received SENT protocol information based on the SENT signal decoding component to obtain the operational status data, and further determines the operational status of the battery status detection device based on this data. When a fault is determined in the battery status detection device, a corresponding fault code can be generated to provide a fault indication.

[0106] The control unit may include a second controller, which may be, for example, an MCU. It should be noted that for the MCU, the SENT signal decoding component is an inherent component. Therefore, by using the industry-standard SENT signal protocol to transmit battery status data—a hardwired information that the MCU can directly receive—the battery management controller directly uses the SENT signal decoding component within the MCU to parse the battery status data. This eliminates the need for an additional communication decoder design, thereby reducing the structural complexity and production cost of the detection system.

[0107] Using the above method, each battery status detection device sends the detected battery status data to the control unit via the SENT signal line. The control unit can then directly parse this battery status data to determine the battery's thermal runaway state without the need for an additional communication data decoder. Compared to CAN communication, eliminating the CAN decoder in both the battery status detection device and the control unit reduces system complexity and cost.

[0108] Figure 6 It is based on Figure 5 The illustrated embodiment presents a flowchart of a battery state detection method, as shown below. Figure 6 As shown, the method also includes the following steps: In step S503, when the target device containing the battery is in a dormant state, in response to an abnormal battery state, the battery state detection device sends a wake-up message to the control unit via the SENT signal line. The wake-up message is used to wake up the control unit.

[0109] The target device may include, for example, a vehicle or a terminal device. If the target device is a vehicle, the battery is the vehicle's power battery; if the target device is a terminal device, the battery is the terminal device's battery. Abnormal battery conditions may include, for example, a detected gas pressure in the battery compartment being greater than or equal to a preset pressure threshold, and / or the gas composition in the battery compartment including preset gas components (such as hydrogen, carbon monoxide, etc.).

[0110] Taking a vehicle as an example, the battery status detection device is a thermal runaway sensor, and the control unit is a battery management controller. When the vehicle is in a dormant state, the thermal runaway sensor is typically in a low-power mode. In this low-power mode, the thermal runaway sensor performs low-frequency detection of gas data in the battery compartment. If the detected battery status data is normal, it does not need to send the battery status data to the battery management controller in real time to save power. In this low-power mode, when the thermal runaway sensor detects an abnormal battery status, it can first send a wake-up message to the battery management controller via the SENT signal line. This wake-up message is used to wake up the battery management controller, so that after waking up the battery management controller, the vehicle controller process for thermal runaway warning can be further activated.

[0111] Therefore, this disclosure also enables timely wake-up of the control unit when the battery status is abnormal via the SENT signal line. It should be noted that in actual operating conditions, the battery status data and the wake-up information typically do not need to be transmitted simultaneously. Therefore, the SENT signal line can be used to transmit both the battery status data and the wake-up information. This avoids the need for a separate hardwired connection for transmitting the wake-up information, reduces the wiring harness connection between the battery status detection device and the control unit, and lowers the probability of data transmission failures.

[0112] For example, the battery state detection device includes a first controller and a first switching device connected to the first controller, the first switching device also being connected to a SENT signal line. Thus, during the execution of step S503, in response to an abnormal battery state, the first controller can control the SENT signal line via the first switching device to send a wake-up message to the control unit. This wake-up message could, for example, be a high-level signal transmitted to the battery management controller on the SENT signal line.

[0113] For example, one end of the first switching device can be connected to a 12V power supply. In this way, when the thermal runaway sensor determines that the battery is in an abnormal state based on the MCU, the MCU can control the first switching device to close, so as to pull the signal transmitted on the SENT signal line high to 12V, thereby waking up the battery management controller through the 12V high-level signal transmitted on the SENT signal line.

[0114] It is understandable that the operating mode of the battery status detection device will differ depending on whether the target device is in a sleep state or not. In related technologies, separate hardwires are required to control the switching of the operating mode of each battery status detection device by the control unit; however, this results in excessive wiring and a complex detection system structure. Considering that the signal transmission of the SENT signal line is unidirectional, meaning it can only send data from the sensor side to the controller side, this disclosure aims to avoid introducing excessive hardwires by improving the architecture of the control unit (e.g., ...). Figure 4 As shown, the second switching device can be deployed in the control unit. By controlling the on / off state of the second switching device, the mode switching command can be sent to each battery state detection device. This allows the control unit to control the switching of the operating mode of the battery state detection device through the SENT signal line.

[0115] Therefore, in yet another possible embodiment of this disclosure, the control unit includes a second controller and a second switching device connected to the second controller, the second switching device also being connected to the SENT signal line; Figure 7 It is based on Figure 5 The illustrated embodiment presents a flowchart of a battery state detection method, as shown below. Figure 7 As shown, the method also includes the following steps: In step S504, the second controller controls the SENT signal line to send a mode switching command to each battery state detection device through the second switching device. The mode switching command is used to instruct the battery state detection device to switch the working mode. Different working modes correspond to different detection frequencies.

[0116] In one implementation of step S504, in response to the target device containing the battery switching from a dormant state to a non-dormant state, the second controller controls the SENT signal line to send a first mode switching instruction to each battery state detection device through the second switching device. The first mode switching instruction is used to instruct the battery state detection device to switch from a first working mode to a second working mode, and the detection frequency corresponding to the first working mode is lower than the detection frequency corresponding to the second working mode.

[0117] The first mode switching instruction can be, for example, a high-level signal transmitted via the SENT signal line.

[0118] In another implementation of step S504, in response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller controls the SENT signal line to send a second mode switching instruction to each battery state detection device through the second switching device. The second mode switching instruction is used to instruct the battery state detection device to switch from a second working mode to a first working mode. The detection frequency corresponding to the first working mode is lower than the detection frequency corresponding to the second working mode.

[0119] The second mode switching command can be, for example, a low-level signal transmitted via the SENT signal line.

[0120] Figure 8 This is a block diagram illustrating an electronic device according to an exemplary embodiment. The electronic device may be, for example, a vehicle, which may be a hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other type of vehicle. Device 800 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle. The battery state detection system involved in device 800 may be, for example,... Figure 1 The battery status detection system shown.

[0121] Reference Figure 8 The device 800 may also include various subsystems, such as an infotainment system 810, a sensing system 820, a decision control system 830, a drive system 840, and a computing platform 850. The device 800 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the device 800 can be interconnected via wired or wireless means.

[0122] In some embodiments, the infotainment system 810 may include a communication system, an entertainment system, and a navigation system, etc.

[0123] The sensing system 820 may include several types of sensors for sensing information about the environment surrounding the device 800. For example, the sensing system 820 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0124] The decision control system 830 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0125] The drive system 840 may include components that provide powered motion to the device 800. In one embodiment, the drive system 840 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0126] Some or all of the functions of device 800 are controlled by computing platform 850. Computing platform 850 may include at least one processor 851 and memory 852, and processor 851 may execute instructions 853 stored in memory 852.

[0127] The processor 851 can be any conventional processor, such as a commercially available CPU. The processor may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems on chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0128] The memory 852 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0129] In addition to instruction set 853, memory 852 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 852 can be used by computing platform 850.

[0130] In this embodiment of the disclosure, processor 851 may execute instructions 853 to complete all or part of the steps of the vehicle control method described above.

[0131] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the battery state detection method provided in this disclosure.

[0132] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the battery state detection method described above when executed by the programmable device.

[0133] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0134] In the above detailed description, reference has been made to the accompanying drawings, which illustrate specific aspects of this disclosure by way of illustration. In this regard, terms indicating direction or positional relationship, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” are used with reference to the orientation of the described figures. Since components of the described device can be positioned in multiple different orientations, directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of this disclosure. Therefore, the following detailed description should not be considered limiting.

[0135] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0136] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0137] Furthermore, the term "above" as used herein with respect to components, elements, or material layers formed or located "above" a surface may be used to indicate that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the term "above" as used with respect to components, elements, or material layers formed or located "above" a surface may also optionally have a specific meaning: that the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, for example, in direct contact with the surface.

[0138] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0139] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0140] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0141] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0142] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

[0143] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery state detection system, characterized in that, include: The control unit and at least one battery status detection device, each of the battery status detection devices being communicatively connected to the control unit via a Single-sided Half-Word Transmission Protocol (SENT) signal line, the control unit including a SENT signal decoding component; The battery status detection device is configured to send the detected battery status data to the control unit via the SENT signal line; The control unit is configured to decode the battery state data through the SENT signal decoding component to determine the thermal runaway state of the battery.

2. The system according to claim 1, characterized in that, When the target device containing the battery is in a dormant state, in response to an abnormal battery state, the battery state detection device is further configured to send a wake-up message to the control unit via the SENT signal line, the wake-up message being used to wake up the control unit.

3. The system according to claim 2, characterized in that, The battery status detection device includes a first controller and a first switching device connected to the first controller, and the first switching device is also connected to the SENT signal line. In response to an abnormal state of the battery, the first controller is configured to control the SENT signal line to send the wake-up information to the control unit via the first switching device.

4. The system according to claim 2, characterized in that, In response to an abnormal battery condition, the battery condition detection device is further configured to switch from a first operating mode to a second operating mode, wherein the detection frequency of the battery condition detection device in the first operating mode is lower than the detection frequency in the second operating mode.

5. The system according to claim 1, characterized in that, The control unit further includes a second controller and a second switching device connected to the second controller, the second switching device also being connected to the SENT signal line; The second controller is configured to control the SENT signal line to send a mode switching command to each of the battery state detection devices via the second switching device. The mode switching command is used to instruct the battery state detection device to switch its operating mode, and different operating modes correspond to different detection frequencies.

6. The system according to claim 5, characterized in that, In response to the target device containing the battery switching from a sleep state to a non-sleep state, the second controller is configured to control the SENT signal line to send a first mode switching instruction to each of the battery status detection devices via the second switching device. The first mode switching instruction is used to instruct the battery status detection device to switch from a first operating mode to a second operating mode, wherein the detection frequency corresponding to the first operating mode is lower than the detection frequency corresponding to the second operating mode.

7. The system according to claim 6, characterized in that, The battery status detection device is configured to send the detected battery status data to the control unit via the SENT signal line when it is in the second operating mode.

8. The system according to claim 5, characterized in that, In response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller is configured to control the SENT signal line to send a second mode switching command to each of the battery status detection devices via the second switching device. The second mode switching command is used to instruct the battery status detection device to switch from a second operating mode to a first operating mode, wherein the detection frequency corresponding to the first operating mode is lower than the detection frequency corresponding to the second operating mode.

9. The system according to claim 1, characterized in that, The battery status detection device is also configured to send the operating status data of the battery status detection device obtained by self-test to the control unit through the SENT signal line; The control unit is also configured to decode the operating status data through the SENT signal decoding component to determine whether the operating status of the battery status detection device is abnormal.

10. The system according to any one of claims 1-9, characterized in that, The battery state detection device includes a thermal runaway sensor, and the control unit includes a battery management controller; The thermal runaway sensor is configured to detect gas information within the battery pack of the battery and transmit the gas information to the battery management controller via the SENT signal line. The gas information is used to determine the thermal runaway state.

11. A method for detecting battery state, characterized in that, An application is made in a battery status detection system, the system comprising: a control unit and at least one battery status detection device; each of the battery status detection devices is communicatively connected to the control unit via a Single-sided Half-Word Transmission Protocol (SENT) signal line, the control unit including a SENT signal decoding component; the method includes: The battery status data detected by each battery status detection device is sent to the control unit via the SENT signal line; The battery status data is decoded by the SENT signal decoding component to determine the thermal runaway state of the battery.

12. The method according to claim 11, characterized in that, The method further includes: When the target device containing the battery is in a dormant state, in response to an abnormal battery state, the battery state detection device sends a wake-up message to the control unit via the SENT signal line, and the wake-up message is used to wake up the control unit.

13. The method according to claim 12, characterized in that, The battery status detection device includes a first controller and a first switching device connected to the first controller, and the first switching device is also connected to the SENT signal line. The battery status detection device sends wake-up information to the control unit via the SENT signal line, including: In response to an abnormal state of the battery, the first controller controls the SENT signal line to send the wake-up information to the control unit via the first switching device.

14. The method according to claim 11, characterized in that, The control unit includes a second controller and a second switching device connected to the second controller, the second switching device also being connected to the SENT signal line; The method further includes: The second controller controls the SENT signal line to send a mode switching command to each of the battery status detection devices through the second switching device. The mode switching command is used to instruct the battery status detection device to switch its working mode. Different working modes correspond to different detection frequencies.

15. The method according to claim 14, characterized in that, The second controller, through the second switching device, controls the SENT signal line to send mode switching commands to each of the battery state detection devices, including: In response to the target device containing the battery switching from a sleep state to a non-sleep state, the second controller controls the SENT signal line to send a first mode switching command to each of the battery status detection devices through the second switching device. The first mode switching command is used to instruct the battery status detection device to switch from a first working mode to a second working mode, where the detection frequency corresponding to the first working mode is lower than the detection frequency corresponding to the second working mode.

16. The method according to claim 15, characterized in that, The step of sending the battery status data detected by each battery status detection device to the control unit via the SENT signal line includes: For each of the battery status detection devices, when the battery status detection device is in the second operating mode, the detected battery status data is sent to the control unit via the SENT signal line.

17. The method according to claim 14, characterized in that, The second controller, through the second switching device, controls the SENT signal line to send mode switching commands to each of the battery state detection devices, including: In response to the target device containing the battery switching from a non-sleep state to a sleep state, the second controller controls the SENT signal line to send a second mode switching command to each of the battery status detection devices through the second switching device. The second mode switching command is used to instruct the battery status detection device to switch from a second working mode to a first working mode, where the detection frequency corresponding to the first working mode is lower than the detection frequency corresponding to the second working mode.

18. The method according to claim 11, characterized in that, The method further includes: The operating status data of the battery status detection device obtained from the self-test is sent to the control unit through the SENT signal line; The operating status data is decoded by the SENT signal decoding component to determine whether the operating status of the battery status detection device is abnormal.

19. The method according to any one of claims 11-18, characterized in that, The battery state detection device includes a thermal runaway sensor, and the control unit includes a battery management controller; The step of sending the battery status data detected by each battery status detection device to the control unit via the SENT signal line includes: The thermal runaway sensor detects gas information within the battery pack and transmits this gas information to the battery management controller via the SENT signal line. This gas information is used to determine the thermal runaway state.

20. An electronic device, characterized in that, include: The battery state detection system according to any one of claims 1-10.

21. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method described in any one of claims 11-19.

22. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 11-19.

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