Two-way communication lithium battery thermal runaway detection system

Abstract

The utility model discloses a double-channel communication lithium battery thermal runaway detection system, which comprises a plurality of detectors respectively arranged in battery boxes, the detectors are used for collecting environmental data in the battery boxes, and the detectors are connected to a CAN network; the detectors are connected with the detector concentrator in a one-wire communication mode, the detector concentrator is connected to a CAN (Controller Area Network), and the detector concentrator is used for generating alarm data; the detector concentrator is connected with the whole vehicle controller in a one-wire communication mode, the whole vehicle controller is connected to a CAN network, and the whole vehicle controller is used for controlling a fire extinguishing system to act. According to the utility model, environment data and alarm data can be transmitted in two communication modes at the same time, and the problems of data blocking and easy interference caused by short circuit, high load rate, too many error frames, chip abnormity and the like possibly occurring in single CAN communication are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, in particular to a dual-channel communication lithium battery thermal runaway detection system. Background Art

[0002] At present, in order to ensure the continuous normal operation of lithium batteries, detectors are generally arranged in the battery box to monitor data such as temperature, combustible gas, smoke, pressure, etc. inside the box, so as to judge whether the lithium battery has a thermal runaway. The detector transmits data and alarms through the CAN network to the vehicle controller, battery management system, instrument panel, etc., and then prompts relevant personnel about the lithium battery status through relevant information such as text and / or graphic symbols on the instrument panel, sound and light alarms, or further enables the vehicle controller to trigger actions such as fire extinguishing.

[0003] However, due to the complexity of the devices mounted on the vehicle CAN network and the limited number of CAN interfaces of the chip, there will inevitably be a situation where multiple CAN devices are mounted on the same CAN network. Limited by CAN communication technology, as long as there is an abnormality in one device on the network where the detector in the battery box is mounted, such as CAN line short circuit, CAN line short circuit with the power supply line, CAN line short circuit with the ground, high CAN network load rate, excessive error frames, chip abnormality, etc., the data transmission under this CAN network will be affected, making the detection system unable to feedback the status of the battery box in real time and accurately, unable to effectively alarm and extinguish the thermal runaway of the battery box, and thus causing losses to personnel and property. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a dual-channel communication lithium battery thermal runaway detection system, which has the advantages of improving anti-interference and data transmission stability.

[0005] The purpose of the utility model is achieved by adopting the following technical solutions:

[0006] According to an embodiment of the present disclosure, a dual-channel communication lithium battery thermal runaway detection system is provided, including:

[0007] A plurality of detectors respectively arranged in each battery box, the detectors are used to collect the environmental data in the battery box, and each of the detectors is connected to the CAN network;

[0008] A detector concentrator, each of the detectors is connected to the detector concentrator through a one-wire communication method, and the detector concentrator is connected to the CAN network, and the detector concentrator is used to collect the environmental data fed back by each of the detectors and generate alarm data; and,

[0009] A vehicle controller, the detector concentrator is connected to the vehicle controller through a one-wire communication method, and the vehicle controller is connected to the CAN network. The vehicle controller is used to collect the alarm data fed back by the detector concentrator and control the fire extinguishing system to act according to the alarm data.

[0010] To implement the above technical solution, the environment data of each battery box is collected by the detector. The environment data collected by each detector is uploaded to the CAN network and sent to the detector concentrator through a one-wire communication method. The detector concentrator analyzes and processes the environment data fed back by each detector to generate alarm data, then uploads the alarm data to the CAN network and sends it to the vehicle controller through a one-wire communication method. The vehicle controller determines whether to control the fire extinguisher to act and execute fire extinguishing according to the alarm data. Since the one-wire communication method has the advantages of less resource occupation, simple structure, low cost, strong anti-interference, and high transmission data quality, it greatly improves the reliability of lithium battery detection, makes the detection of lithium battery thermal runaway state more effective and timely. By adopting the combination of one-wire communication and CAN network, it can simultaneously realize the transmission of environment data and alarm data by two communication methods, effectively solve the problems of data blockage and susceptibility to interference caused by possible short circuits, high load rate, too many error frames, chip abnormalities, etc. in single CAN communication, and at the same time, the environment data and alarm data transmitted by one-wire communication and CAN network can be compared with each other to correct data and eliminate false alarms.

[0011] In some exemplary embodiments, the detector includes:

[0012] A sensing and acquisition unit for collecting the environment data inside the battery box;

[0013] A detection main control unit for encoding and processing each environment data;

[0014] A first one-wire communication module for performing one-wire communication with the detector concentrator to transmit the encoded and processed environment data;

[0015] A first CAN communication module for communicating with the CAN network to upload the encoded and processed environment data.

[0016] To implement the above technical solution, the environment data inside the battery box is collected by the sensing and acquisition unit, and the environment data is uniformly encoded and processed by the detection main control unit to form a data group that can be read and recognized. The first one-wire communication module realizes one-wire communication, and the first CAN communication module realizes CAN communication, so as to realize the simultaneous data transmission by two communication methods.

[0017] In some exemplary embodiments, the sensing and acquisition unit includes:

[0018] A temperature detection module for detecting ambient temperature data;

[0019] A combustible gas detection module for detecting the concentration of combustible gas in the environment;

[0020] A smoke detection module for detecting the concentration of smoke in the environment; and / or,

[0021] A pressure detection module for detecting the pressure value of the battery box.

[0022] Implementing the above technical solution to collect environmental data such as temperature, combustible gas concentration, smoke concentration, and battery box pressure value.

[0023] In some exemplary embodiments, the detector concentrator includes:

[0024] A plurality of second one-wire communication modules, each of the first one-wire communication modules communicating with the second one-wire communication modules in one-to-one correspondence;

[0025] A centralized main control unit for analyzing and processing environmental data to generate alarm data;

[0026] A third one-wire communication module for performing one-wire communication with the vehicle controller to transmit alarm data;

[0027] A second CAN communication module for communicating with the CAN network to upload alarm data.

[0028] In some exemplary embodiments, the vehicle controller includes:

[0029] A vehicle main control unit for controlling the operation of the fire extinguishing system according to the alarm data;

[0030] A fourth one-wire communication module for communicating with the third one-wire communication module;

[0031] A third CAN communication module for communicating with the CAN network to obtain the uploaded alarm data and sending the control signal of the vehicle main control unit to the fire extinguishing system.

[0032] In some exemplary embodiments, it further includes:

[0033] A battery management system for performing battery power-off isolation control;

[0034] An instrument panel for displaying alarm data;

[0035] The battery management system, the instrument panel, and the fire extinguishing system are communicatively connected to the CAN network.

[0036] In summary, compared with the prior art, the present utility model has the following beneficial effects:

[0037] An embodiment of the present utility model provides a dual-channel communication lithium battery thermal runaway detection system, including: a plurality of detectors respectively arranged in each battery box, the detectors are used to collect the environmental data in the battery box, and each of the detectors is connected to a CAN network; a detector concentrator, each of the detectors is connected to the detector concentrator through a one-wire communication method, and the detector concentrator is connected to the CAN network, the detector concentrator is used to collect the environmental data fed back by each of the detectors and generate alarm data; and, a vehicle controller, the detector concentrator is connected to the vehicle controller through a one-wire communication method, and the vehicle controller is connected to the CAN network, the vehicle controller is used to collect the alarm data fed back by the detector concentrator and control the fire extinguishing system to act according to the alarm data. The environmental data of each battery box is collected by the detectors, the environmental data collected by each detector is uploaded to the CAN network, and is sent to the detector concentrator through a one-wire communication method. The detector concentrator analyzes and processes the environmental data fed back by each detector and generates alarm data, then uploads the alarm data to the CAN network, and sends it to the vehicle controller through a one-wire communication method. The vehicle controller determines whether to control the fire extinguisher to act and execute fire extinguishing according to the alarm data; because the one-wire communication method has the advantages of less resource occupation, simple structure, low cost, strong anti-interference, high transmission data quality, etc., it greatly improves the reliability of lithium battery detection, makes the detection of lithium battery thermal runaway state more effective and more timely. By adopting the combination of one-wire communication and CAN network, it is possible to simultaneously realize the transmission of environmental data and alarm data by two communication methods, effectively solving the problems of data blockage and susceptibility to interference caused by possible short circuits, high load rates, excessive error frames, chip abnormalities, etc. in single CAN communication. Moreover, the environmental data and alarm data transmitted by one-wire communication and CAN network at the same time can be compared with each other to correct data and eliminate false alarms. Description of the Drawings

[0038] Figure 1 It is a schematic structural principle diagram of an embodiment of the present utility model.

[0039] Figure 2 It is a schematic structural diagram of a detector in an embodiment of the present utility model.

[0040] Figure 3 It is a schematic structural diagram of a detector concentrator in an embodiment of the present utility model.

[0041] Figure 4 It is a schematic structural diagram of a vehicle controller in an embodiment of the present utility model.

[0042] Figure 5 It is a schematic structural principle diagram of the data sent by the detector to the detector concentrator in an embodiment of the present utility model.

[0043] Figure 6 This is a schematic diagram of the data structure principle sent from the detector concentrator to the vehicle controller in the embodiment of the present utility model. Specific implementation manners

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] As Figures 1 to 6 shown, the present utility model provides a dual-channel communication lithium battery thermal runaway detection system, including: a plurality of detectors respectively arranged in each battery box, the detectors are used to collect the environmental data in the battery box, and each detector is connected to the CAN network; a detector concentrator, each detector is connected to the detector concentrator through a one-wire communication method and the detector concentrator is connected to the CAN network, and the detector concentrator is used to collect the environmental data fed back by each detector and generate alarm data; and a vehicle controller, the detector concentrator is connected to the vehicle controller through a one-wire communication method and the vehicle controller is connected to the CAN network, and the vehicle controller is used to collect the alarm data fed back by the detector concentrator and control the operation of the fire extinguishing system according to the alarm data.

[0046] Specifically, the detector includes: a sensing and acquisition unit for collecting the environmental data in the battery box; a detection main control unit for encoding and processing each environmental data; a first one-wire communication module for performing one-wire communication with the detector concentrator to transmit the encoded and processed environmental data; and a first CAN communication module for communicating with the CAN network to upload the encoded and processed environmental data. The environmental data in the battery box is collected by the sensing and acquisition unit, and the environmental data is uniformly encoded and processed by the detection main control unit to form a data group that can be read and recognized, and the first one-wire communication module realizes one-wire communication and the first CAN communication module realizes CAN communication, so as to realize data transmission in two communication methods simultaneously.

[0047] Among them, the sensing and acquisition unit includes: a temperature detection module for detecting ambient temperature data, and the temperature detection module can adopt one or more temperature sensors, for example; a combustible gas detection module for detecting the concentration of ambient combustible gas, and the combustible gas detection module can adopt one or more combustible gas sensors, for example; a smoke detection module for detecting the concentration of ambient smoke, and the smoke detection module can adopt one or more smoke sensors, for example; and / or a pressure detection module for detecting the pressure value of the battery box, and the pressure detection module can adopt one or more pressure sensors, for example, so as to realize the acquisition of ambient data such as temperature, combustible gas concentration, smoke concentration, and battery box pressure value.

[0048] As Figure 5 shown, the data structure sent by the detector to the detector concentrator contains 32-bit data. The high 8-bit data represents which type of data this frame contains, specifically one of temperature, combustible gas, smoke, pressure, etc. The low 24-bit data represents the value detected by the corresponding detection module, that is, the temperature value, combustible gas concentration value, smoke concentration value, and pressure value. The detector sends a frame of this data structure every 100 ms and polls to display different detection categories.

[0049] The detector concentrator includes: a number of second one-wire communication modules, and each first one-wire communication module communicates with the second one-wire communication module in one-to-one correspondence; a centralized main control unit for analyzing and processing ambient data to generate alarm data; a third one-wire communication module for performing one-wire communication with the vehicle controller to transmit alarm data; a second CAN communication module for communicating with the CAN network to upload alarm data; according to the alarm data, the alarm level of the battery box can be determined. The centralized main control unit obtains the status data of the corresponding battery box through the second one-wire communication module, performs logical coding, and sends the alarm levels of each battery box to the vehicle controller through the third one-wire communication module and the second CAN communication module.

[0050] As Figure 6 shown, the data structure sent by the detector concentrator to the vehicle controller contains 32-bit data. Every 2 bytes represent the alarm level of a battery box. 0 represents no alarm, 1 represents a first-level alarm, 2 represents a second-level alarm, and 3 represents a third-level alarm. The detector concentrator sends a frame of this data structure every 100 ms and can support 16 battery boxes, meeting the requirements of the number of common battery boxes.

[0051] The vehicle controller includes: a vehicle main control unit for controlling the operation of the fire extinguishing system according to the alarm data; a fourth one-wire communication module for communicating with the third one-wire communication module; a third CAN communication module for communicating with the CAN network to obtain the uploaded alarm data and sending the control signal of the vehicle main control unit to the fire extinguishing system; the detector concentrator and the second, third, and fourth one-wire communication modules on the vehicle main control unit can be expanded, with a maximum expansion of 256 channels of detection and communication. The battery box alarm level feedback by the detector concentrator can be collected through the fourth one-wire communication module.

[0052] Furthermore, the system also includes: a battery management system for performing battery power-off isolation control; an instrument panel for displaying alarm data; the battery management system, the instrument panel, and the fire extinguishing system are communicatively connected to the CAN network. Through the vehicle control system, the battery management system can be controlled to perform power-off isolation, the instrument panel can display alarm information, and the fire extinguishing system can be automatically started and stopped.

[0053] The environmental data of each battery box is collected by the detectors. The environmental data collected by each detector is uploaded to the CAN network and sent to the detector concentrator through one-wire communication. The detector concentrator analyzes and processes the environmental data feedback by each detector to generate alarm data, and then uploads the alarm data to the CAN network and sends it to the vehicle controller through one-wire communication. The vehicle controller determines whether to control the fire extinguisher to operate and extinguish the fire according to the alarm data. Since the one-wire communication method has the advantages of less resource occupancy, simple structure, low cost, strong anti-interference, and high transmission data quality, it greatly improves the reliability of lithium battery detection, making the detection of the lithium battery thermal runaway state more effective and timely. By adopting the combination of one-wire communication and the CAN network, the transmission of environmental data and alarm data can be achieved simultaneously in both communication methods, effectively solving the problems of data blockage and susceptibility to interference caused by possible short circuits, high load rates, excessive error frames, chip abnormalities, etc. in single CAN communication. Moreover, the environmental data and alarm data transmitted by one-wire communication and the CAN network can be compared with each other to correct data and eliminate false alarms.

[0054] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made. These are all equivalent modifications and evolutions made to the above embodiments based on the essence of the present utility model, and all belong to the protection scope of the present utility model.

Claims

1. A dual-channel communication lithium battery thermal runaway detection system, characterized in that, Including: A number of detectors respectively arranged in each battery box, the detectors are used to collect the environmental data in the battery box, and each of the detectors is connected to the CAN network; A detector concentrator, each of the detectors is connected to the detector concentrator through a one-wire communication method, and the detector concentrator is connected to the CAN network, the detector concentrator is used to collect the environmental data fed back by each of the detectors and generate alarm data; and, A vehicle controller, the detector concentrator is connected to the vehicle controller through a one-wire communication method, and the vehicle controller is connected to the CAN network, the vehicle controller is used to collect the alarm data fed back by the detector concentrator and control the action of the fire extinguishing system according to the alarm data.

2. The dual-channel communication lithium battery thermal runaway detection system according to claim 1, wherein The detector includes: A sensing and acquisition unit, used to collect the environmental data in the battery box; A detection main control unit, used to encode and process each environmental data; A first one-wire communication module, used to perform one-wire communication with the detector concentrator to transmit the encoded and processed environmental data; A first CAN communication module, used to communicate with the CAN network to upload the encoded and processed environmental data.

3. The dual-channel communication lithium battery thermal runaway detection system according to claim 2, characterized in that, The sensing and acquisition unit includes: A temperature detection module, used to detect the environmental temperature data; A combustible gas detection module, used to detect the concentration of environmental combustible gas; A smoke detection module, used to detect the environmental smoke concentration; and / or, A pressure detection module, used to detect the pressure value of the battery box.

4. The dual-channel communication lithium battery thermal runaway detection system according to claim 2 or 3, characterized in that The detector concentrator includes: A number of second one-wire communication modules, each of the first one-wire communication modules communicates with the second one-wire communication modules in one-to-one correspondence; A centralized main control unit, used to analyze and process the environmental data to generate alarm data; A third one-wire communication module, used to perform one-wire communication with the vehicle controller to transmit the alarm data; A second CAN communication module, used to communicate with the CAN network to upload the alarm data.

5. The dual-channel communication lithium battery thermal runaway detection system according to claim 4, wherein, The vehicle controller includes: A vehicle main control unit, used to control the action of the fire extinguishing system according to the alarm data; A fourth one-wire communication module, used to communicate with the third one-wire communication module; A third CAN communication module, used to communicate with the CAN network to obtain the uploaded alarm data and send the control signal of the vehicle main control unit to the fire extinguishing system.

6. The dual-channel communication lithium battery thermal runaway detection system according to claim 1, characterized in that, It further includes: A battery management system, used to perform battery power-off isolation control; An instrument panel, used to display the alarm data; The battery management system, the instrument panel and the fire extinguishing system are communicatively connected to the CAN network.

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