Garage active protection system and method based on vehicle bms communication

Abstract

The application provides a garage active protection system and method based on vehicle BMS communication, which comprises an active protection information collection unit and a screening unit; the active protection information collection unit comprises a communication module and a control module; an input end of the communication module is used for connecting with a vehicle BMS system to obtain vehicle battery state information; an output end of the control module is used for connecting with a charging gun CC1 or CC2 interface in the vehicle and a vehicle BMS system auxiliary source, and the control module is used for controlling on-off of the charging gun CC1 or CC2 interface in the vehicle and power supply of the vehicle BMS system auxiliary source; the screening unit comprises a model comparison filtering module and an alarm control sending module connected with an output end of the model comparison filtering module. By controlling the charging gun CC1 or CC2 interface in the vehicle to be connected and cooperating with the vehicle BMS system auxiliary source to supply power, the vehicle BMS system is in a communication state during active protection, the vehicle battery state is screened in real time through the screening system, and the vehicle owner and relevant staff are reminded to handle in time before the vehicle actually enters a non-safe state.

Description

Technical Field

[0001] This invention relates to an active protection system for parking garages, specifically to an active protection system for parking garages based on vehicle BMS communication and a method for active protection of parking garages using this system. Background Technology

[0002] Because new energy vehicles still perform battery equalization and battery heating operations when stationary, there is still a possibility of spontaneous combustion and fire.

[0003] Chinese patent CN110838609B discloses a method for protecting a power battery from thermal runaway, which includes real-time detection of whether the vehicle is in a powered-off state. When the vehicle is in a powered-off state, the thermal runaway detection unit is controlled to work to detect the temperature, gas concentration, and / or smoke concentration of the power battery pack. Then, based on the data detected by the thermal runaway detection unit, it is determined whether the power battery pack has experienced a thermal runaway fault. If so, the power output of the power battery pack is cut off, and a fire extinguishing device is controlled to extinguish the fire in the power battery pack.

[0004] However, during the implementation of this method, CAN communication remains passively shut down, making it impossible to obtain the vehicle battery status information output by the vehicle BMS system. Furthermore, relying solely on the vehicle's own thermal runaway detection unit to detect powertrain temperature, gas concentration, and smoke concentration is lagging, as it can only be detected when the vehicle battery actually enters an unsafe state, resulting in poor actual protection effectiveness. Summary of the Invention

[0005] The purpose of this invention is to address the technical problems of existing protection methods, which suffer from poor actual protection effects because the CAN communication is always passively shut down during implementation, making it impossible to obtain the vehicle battery status information output by the vehicle BMS system. Furthermore, relying solely on the vehicle's own thermal runaway detection unit to detect powertrain temperature, gas concentration, and smoke concentration is lagging, and can only be detected when the vehicle battery actually enters an unsafe state. Therefore, this invention provides a garage active protection system and method based on vehicle BMS communication.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A garage active protection system based on vehicle BMS communication, which is unique in that:

[0008] Includes an active protection information collection unit and a screening unit;

[0009] The active protection information collection unit includes a communication module and a control module; the input end of the communication module is used to connect with the vehicle BMS system to obtain vehicle battery status information; the output end of the control module is used to connect with the charging gun CC1 or CC2 interface in the vehicle and the auxiliary power source of the vehicle BMS system to control the on / off of the charging gun CC1 or CC2 interface in the vehicle and the power supply and off of the auxiliary power source of the vehicle BMS system, so that the vehicle BMS system maintains communication status during active protection.

[0010] The screening unit includes a model comparison and filtering module and an alarm control sending module connected to its output. The input of the model comparison and filtering module is connected to the output of the communication module, and is used to compare the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If the vehicle battery is in a safe state, no information is sent. If the vehicle battery is in an abnormal state, alarm information and control information are sent. The output of the alarm control sending module is connected to the input of the control module, and controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system according to the control information, and sends an alarm prompt signal according to the alarm information.

[0011] Furthermore, the vehicle battery status information includes SOC information, minimum single-cell voltage information, maximum single-cell voltage information, minimum battery temperature information, maximum battery temperature information, whether the minimum single-cell voltage is too low, whether the minimum single-cell voltage is too high, whether the battery pack SOC is too low, whether the battery pack SOC is too high, and maximum allowable temperature information.

[0012] Furthermore, the active protection information collection unit and the screening unit exchange data in real time via Wi-Fi or a wired network.

[0013] This invention also provides a garage active protection method based on vehicle BMS communication, which is based on the aforementioned garage active protection system based on vehicle BMS communication, and is characterized by including the following steps:

[0014] Step 1: Control the charging gun CC1 or CC2 interface in the vehicle to be connected through the control module, and power the auxiliary power supply of the vehicle BMS system so that the vehicle BMS system is in communication state.

[0015] Step 2: Conduct real-time CAN communication with the vehicle's BMS system via the communication module to obtain vehicle battery status information;

[0016] Step 3: The communication module transmits the vehicle battery status information to the model comparison and filtering module in real time.

[0017] Step 4: The model comparison and filtering module compares the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If it is in a safe state, no information is sent. If an abnormal state occurs, alarm information and control information are sent to the alarm control sending module.

[0018] Step 5: The alarm control sending module sends an alarm prompt signal based on the alarm information, and controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system according to the control information.

[0019] This invention also provides another type of active protection system for garages based on vehicle BMS communication, which is characterized by:

[0020] Includes an active protection information collection unit and a screening unit;

[0021] The active protection information collection unit includes a communication module and a front-end switching controller; the input of the communication module is used to connect with the vehicle BMS system and the charging power source to obtain vehicle battery status information and charging power source information; the output of the front-end switching controller is connected to the charging power source to control the on / off state of the charging power source.

[0022] The screening unit includes a model comparison and filtering module and an alarm control sending module connected to its output. The input of the model comparison and filtering module is connected to the output of the communication module, and is used to compare the vehicle battery status information and charging source information with corresponding preset thresholds to determine whether the vehicle battery is in a safe state during charging. If it is in a safe state, no information is sent; if an abnormal state occurs, a charging source power-off message and a notification message are sent. The output of the alarm control sending module is connected to the input of the front-end switching controller, and is used to control the charging source to power off through the front-end switching controller according to the charging source power-off message, and to send a prompt alarm signal according to the notification message.

[0023] Furthermore, the vehicle battery status information includes SOC information, minimum single cell voltage information, maximum single cell voltage information, minimum battery temperature information, maximum battery temperature information, whether the minimum single cell voltage is too low, whether the minimum single cell voltage is too high, whether the battery pack SOC is too low, whether the battery pack SOC is too high, and maximum allowable temperature information.

[0024] The charging source information includes charging current information, charging voltage information, and charging power information.

[0025] Furthermore, the active protection information collection unit and the screening unit exchange data in real time via Wi-Fi or a wired network.

[0026] Meanwhile, this invention also provides a garage active protection method based on vehicle BMS communication. Based on the aforementioned garage active protection system based on vehicle BMS communication, its special feature is that it includes the following steps:

[0027] Step 1: Communicate in real time with the vehicle's BMS system and charging source via the communication module to obtain vehicle battery status information and charging source information;

[0028] Step 2: The communication module transmits the vehicle battery status information to the model comparison and filtering module in real time.

[0029] Step 3: The model comparison and filtering module compares the vehicle battery status information and charging source information with the corresponding preset thresholds to determine whether the vehicle battery is in a safe state during charging. If it is in a safe state, no information is sent. If an abnormal state occurs, the charging source power failure information and notification information are sent to the alarm control sending module.

[0030] Step 4: The alarm control sending module controls the power supply to be cut off through the front-end switching controller based on the power supply failure information, and issues a prompt alarm signal according to the notification information.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. This invention controls the connection of the charging gun CC1 or CC2 interface in the vehicle, and coordinates with the auxiliary power supply of the vehicle BMS system to ensure that the vehicle BMS system is in a communication state during active protection. This avoids monitoring failure due to timeout of the vehicle BMS system. Furthermore, the invention uses a screening system to perform real-time screening of the vehicle battery status, enabling timely detection before the vehicle actually enters an unsafe state. This alerts the owner and relevant personnel to take timely action, preventing further damage to the vehicle and achieving an active protection effect.

[0033] 2. During the charging process, the present invention can monitor the vehicle battery status information and charging source information in real time. It can determine whether the vehicle battery is in a safe state by setting a preset threshold. When an abnormal state occurs, it can control the charging source to cut off the power in time and notify the vehicle owner and staff. Before the vehicle actually enters an unsafe state, it can be dealt with in time, thereby achieving an active protection effect. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a garage active protection system based on vehicle BMS communication according to the present invention.

[0035] Figure 2 This is a schematic diagram of the second embodiment of the active protection system for garages based on vehicle BMS communication of the present invention. Detailed Implementation

[0036] To make the objectives, advantages, and features of the present invention clearer, the garage active protection system and method based on vehicle BMS communication proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following specific embodiments. It should be noted that: the accompanying drawings are all in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of the present invention; secondly, the structures shown in the drawings are often part of the actual structure.

[0037] Example 1

[0038] This embodiment provides a garage active protection system based on vehicle BMS communication, primarily for use in garages without charging stations. The system includes an active protection information collection unit and a screening unit connected to its output. Specifically, the active protection information collection unit and the screening unit can be connected via Wi-Fi or a wired network, enabling real-time information exchange. The screening unit can be deployed either in the garage's main control system or in the cloud, depending on actual needs.

[0039] In this embodiment, the active protection information collection unit includes a communication module and a control module. The input terminal of the communication module is used to connect with the vehicle's BMS system to achieve CAN communication and obtain vehicle battery status information. Specifically, the vehicle battery status information includes SOC information, minimum single-cell voltage information, maximum single-cell voltage information, minimum battery temperature information, maximum battery temperature information, whether the minimum single-cell voltage is too low, whether the minimum single-cell voltage is too high, whether the battery pack SOC is too low, whether the battery pack SOC is too high, and the maximum allowable temperature information. New energy vehicles determine whether a charging gun is plugged in by using the CC1 or CC2 interface of the national standard charging gun cable. The vehicle's BMS system auxiliary power supply determines whether communication with the BMS system begins. In actual operation, the vehicle can recognize the charging gun as plugged in again simply by controlling the CC1 or CC2 interface without actually plugging and unplugging the gun. This, combined with the vehicle's BMS system auxiliary power supply, ensures the BMS system remains in communication during active protection, preventing monitoring failures due to BMS system timeouts. Therefore, in this embodiment, the control module is connected to the CC1 or CC2 interface of the charging gun in the vehicle and the BMS system auxiliary power supply, thereby controlling the on / off state of the CC1 or CC2 interface of the charging gun and the power supply to the vehicle's BMS system auxiliary power supply. This ensures the vehicle's BMS system remains in communication during active protection, facilitating real-time acquisition of vehicle battery status information.

[0040] The screening unit includes a model comparison and filtering module and an alarm control sending module connected to its output. The input of the model comparison and filtering module is connected to the output of the communication module, which compares the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If the vehicle battery is in a safe state, no information is sent. If the vehicle battery is in an abnormal state, alarm information and control information are sent. The output of the alarm control sending module is connected to the input of the control module. According to the control information, it controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system, and sends an alarm prompt signal according to the alarm information.

[0041] Based on the aforementioned active garage protection system based on vehicle BMS communication, this embodiment provides an active garage protection method based on vehicle BMS communication, specifically including the following steps:

[0042] Step 1: Control the charging gun CC1 or CC2 interface in the vehicle to be connected through the control module, and power the auxiliary power supply of the vehicle BMS system so that the vehicle BMS system is in communication state.

[0043] Step 2: Conduct real-time CAN communication with the vehicle's BMS system via the communication module to obtain vehicle battery status information;

[0044] Step 3: The communication module transmits the vehicle battery status information to the model comparison and filtering module in real time.

[0045] Step 4: The model comparison and filtering module compares the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If it is in a safe state, no information is sent. If an abnormal state occurs, alarm information and control information are sent to the alarm control sending module.

[0046] Step 5: The alarm control sending module sends an alarm prompt signal based on the alarm information, and controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system according to the control information.

[0047] Example 2

[0048] This embodiment provides a garage active protection system based on vehicle BMS communication, primarily used in garages equipped with charging stations. The system includes an active protection information collection unit and a screening unit. Specifically, the active protection information collection unit and the screening unit can be connected via Wi-Fi or a wired network, enabling real-time information exchange. The screening unit can be deployed either in the garage's main control system or in the cloud, depending on actual needs.

[0049] The active protection information collection unit includes a communication module and a front-end switching controller. The input of the communication module connects to the vehicle's BMS system and the charging source to acquire vehicle battery status information and charging source information. Vehicle battery status information includes SOC information, individual cell minimum voltage information, individual cell maximum voltage information, battery minimum temperature information, battery maximum temperature information, whether the individual cell minimum voltage is too low, whether the individual cell minimum voltage is too high, whether the battery pack SOC is too low, whether the battery pack SOC is too high, and maximum allowable temperature information. Charging source information includes charging current information, charging voltage information, and charging power information. The output of the front-end switching controller is connected to the charging power source to control its on / off state. The screening unit includes a model comparison and filtering module and an alarm control sending module connected to its output. The input of the model comparison and filtering module is connected to the output of the communication module to compare the vehicle battery status information and the charging power source information with corresponding preset thresholds to determine whether the vehicle battery is in a safe state during charging. If it is in a safe state, no information is sent. If an abnormal state occurs, a charging power source disconnection message and a notification message are sent. The output of the alarm control sending module is connected to the input of the front-end switching controller to control the charging power source to disconnect based on the charging power source disconnection message and to send a warning alarm signal based on the notification message.

[0050] Based on the aforementioned active garage protection system based on vehicle BMS communication, this embodiment provides an active garage protection method based on vehicle BMS communication, including the following steps:

[0051] Step 1: Communicate in real time with the vehicle's BMS system and charging station via the communication module to obtain vehicle battery status information and charging source information;

[0052] Step 2: The communication module transmits the vehicle battery status information to the model comparison and filtering module in real time.

[0053] Step 3: The model comparison and filtering module compares the vehicle battery status information and charging source information with the corresponding preset thresholds to determine whether the vehicle battery is in a safe state during charging. If it is in a safe state, no information is issued. If an abnormal state occurs, a charging source power-off information and a notification information are issued.

[0054] Step 4: The alarm control sending module controls the power supply to be cut off through the front-end switching controller based on the power supply failure information, and issues a prompt alarm signal according to the notification information.

[0055] The active protection system provided by this invention can issue timely alarms and control guidance signals before the vehicle battery actually enters an unsafe state, guiding the vehicle owner and staff to take relevant measures in advance.

Claims

1. A garage active protection system based on vehicle BMS communication, characterized in that: Includes an active protection information collection unit and a screening unit; The active protection information collection unit includes a communication module and a control module; the input end of the communication module is used to connect with the vehicle BMS system to obtain vehicle battery status information; the output end of the control module is used to connect with the charging gun CC1 or CC2 interface in the vehicle and the auxiliary power source of the vehicle BMS system to control the on / off of the charging gun CC1 or CC2 interface in the vehicle and the power supply and off of the auxiliary power source of the vehicle BMS system, so that the vehicle BMS system maintains communication status during active protection. The screening unit includes a model comparison and filtering module and an alarm control sending module connected to its output. The input of the model comparison and filtering module is connected to the output of the communication module, and is used to compare the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If the vehicle battery is in a safe state, no information is sent. If the vehicle battery is in an abnormal state, alarm information and control information are sent. The output of the alarm control sending module is connected to the input of the control module, and controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system according to the control information, and sends an alarm prompt signal according to the alarm information.

2. The garage active protection system based on vehicle BMS communication according to claim 1, characterized in that: The vehicle battery status information includes SOC information, minimum single-cell voltage information, maximum single-cell voltage information, minimum battery temperature information, maximum battery temperature information, whether the minimum single-cell voltage is too low information, whether the minimum single-cell voltage is too high information, whether the battery pack SOC is too low information, whether the battery pack SOC is too high information, and maximum allowable temperature information.

3. The garage active protection system based on vehicle BMS communication according to claim 2, characterized in that: The active protection information collection unit and screening unit exchange data in real time via Wi-Fi or wired network.

4. A garage active protection method based on vehicle BMS communication, based on the garage active protection system based on vehicle BMS communication as described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Control the charging gun CC1 or CC2 interface in the vehicle to be connected through the control module, and power the auxiliary power supply of the vehicle BMS system so that the vehicle BMS system is in communication state. Step 2: Conduct real-time CAN communication with the vehicle's BMS system via the communication module to obtain vehicle battery status information; Step 3: The communication module transmits the vehicle battery status information to the model comparison and filtering module in real time. Step 4: The model comparison and filtering module compares the vehicle battery status information with the corresponding preset threshold to determine whether the vehicle battery is in a safe state. If it is in a safe state, no information is sent. If an abnormal state occurs, alarm information and control information are sent to the alarm control sending module. Step 5: The alarm control sending module sends an alarm prompt signal based on the alarm information, and controls the disconnection of the charging gun CC1 or CC2 interface in the vehicle and the power cut-off of the auxiliary power supply of the vehicle BMS system according to the control information.

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