Multi-channel battery discharge curve acquisition device and system for MOBAD module

Abstract

The invention relates to the field of vehicle-mounted battery detection, in particular to a multi-path battery discharge curve acquisition device and system for an MOBAD module. The device comprises a CPU module, a relay circuit, a display module, an analog switch circuit and a discharging circuit, the CPU module is in communication connection with a PC, the relay circuit comprises a plurality of relays, one end of each relay is connected with each battery, the other end of each relay is connected with the discharging circuit, each relay is further connected with the analog switch circuit, and the analog switch circuit is connected with the display module. The CPU module is in communication connection with the relay circuit, the analog switch circuit and the display module. Compared with the prior art, the method has the advantages of fully automatically detecting the discharge performance of the lithium thionyl chloride battery, improving the detection accuracy and efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the field of on-vehicle battery detection, and in particular to a multi-channel battery discharge curve acquisition device and system for a MOBAD module. Background Art

[0002] As a configuration module of the CTCS3-300T on-vehicle device, the MOBAD module provides key configuration data for the ATP device. When the ATP is powered off, the lithium thionyl chloride battery inside the module can keep the original configuration information of the ATP device from being lost. At present, there are certain errors in the battery power detection module in the MOBAD module for calculating the power of the lithium thionyl chloride battery, and it is impossible to accurately calculate the actual available power of the current lithium thionyl chloride battery. And generally, manual short-term instrument tests are carried out on individual samples, with low efficiency.

[0003] After retrieval, Chinese Patent CN102707238A discloses a battery performance on-line monitoring system and monitoring method, belonging to the substation detection field, including an acquisition unit, an internal resistance measurement unit and a communication unit. The batteries in the battery pack are divided into multiple units, and the load is respectively connected to the batteries in each unit to form a closed-loop circuit to discharge the batteries. The acquisition unit acquires the discharge parameters of each battery, and the internal resistance measurement unit calculates the internal resistance of each battery according to the acquired information and uploads it to the communication unit. The communication unit accesses the local area network and transmits the data to the server. After receiving the data, the server analyzes, processes and saves it, and publishes the data in the form of a web page through its built-in WEB publishing function. Computers in the local area network can view the status of each battery pack by accessing the web page. However, in the field of on-vehicle battery detection and monitoring, no such exploration has been made yet, and on-vehicle battery detection still faces the problems of large detection result errors and low detection efficiency, so it has become a problem to be solved in this field. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of large detection result errors and low detection efficiency in the above-mentioned prior art, and provide a multi-channel battery discharge curve acquisition device and system for a MOBAD module. The device and system monitor the discharge curves of a large number of lithium thionyl chloride battery samples, obtain the best prediction index for insufficient power, can timely and accurately judge the battery power of the MOBAD module, and then notify the maintenance department for processing.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to a first aspect of the present invention, there is provided a multi-channel battery discharge curve acquisition device for a MOBAD module, including a CPU module, a relay circuit, and a display module. The CPU module is communicatively connected to a PC. It further includes an analog switch circuit and a discharge circuit. The relay circuit includes a plurality of relays. One end of each relay is respectively connected to each battery, and the other end is connected to the discharge circuit. Each relay is also connected to the analog switch circuit. The CPU module is communicatively connected to the relay circuit, the analog switch circuit, and the display module.

[0007] As a preferred technical solution, the relay circuit includes a small 5V relay and a triode.

[0008] As a preferred technical solution, the discharge circuit includes a load resistor.

[0009] As a preferred technical solution, the resistance value of the load resistor is determined by the discharge current required by the battery.

[0010] As a preferred technical solution, the analog switch circuit includes a plurality of analog-to-digital converters.

[0011] As a preferred technical solution, the analog switch circuit includes a plurality of analog switch chips.

[0012] As a preferred technical solution, the analog switch chip uses a TMUX1204 chip.

[0013] As a preferred technical solution, the display module uses an LCD liquid crystal module.

[0014] As a preferred technical solution, the CPU module uses an STM32 chip.

[0015] According to a second aspect of the present invention, there is provided a system applying the device. The system includes the following operating steps:

[0016] S1, the CPU module controls the relay circuit to conduct, and connects the battery sample to the analog switch circuit and the discharge circuit;

[0017] S2, the CPU module controls the analog switch circuit to select and receives the analog signal of the current battery sample;

[0018] S3, the CPU module calculates the voltage and internal resistance value of the current battery sample and displays them through the display module, and sends the voltage and the internal resistance value to the PC;

[0019] S4, the PC draws the discharge curve of the current battery sample according to the voltage and the internal resistance value.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention connects multiple relays to multiple batteries in one-to-one correspondence, and realizes unified communication control through the CPU module, which can discharge battery samples and collect data in a fully automatic manner. The interface of the display module displays the current sample parameters in real time, improving the accuracy and intuitiveness of the detection results, facilitating real-time monitoring, and being fully automatic without manual intervention, effectively improving the detection efficiency and reducing the monitoring cost.

[0022] 2. The present invention adopts a multi-channel design, which can access multiple battery samples and has good scalability and compatibility. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the device in the embodiment of the present invention. Detailed Embodiment

[0024] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0025] Embodiment

[0026] As Figure 1 shown, this embodiment provides a multi-channel battery discharge curve acquisition device for the MOBAD module, including a CPU module, a relay circuit, and a display module. The CPU module is communicatively connected to a PC, and further includes an analog switch circuit and a discharge circuit. The relay circuit includes multiple relays, one end of each relay is respectively connected to each battery, and the other end is connected to the discharge circuit. Each relay is also connected to the analog switch circuit. The CPU module is communicatively connected to the relay circuit, the analog switch circuit, and the display module.

[0027] Specifically, the relay circuit includes a small 5V relay and a triode, which are used to control the access and disconnection of battery samples; the discharge circuit includes a load resistor, which is determined according to the discharge current required by the battery and is used to discharge the battery samples; the analog switch circuit includes multiple analog switch chips, and the analog switch chips adopt TMUX1204 chips, which are used to perform multi-channel selection on battery samples for the CPU to collect; the display module adopts an LCD liquid crystal module, which is used to display the discharge state and the collected parameters; the CPU module adopts an STM32 chip, which is used to control the relay circuit and the analog switch module, drive the display module, and communicate with the PC.

[0028] The working principle of the aforementioned device is as follows:

[0029] The CPU module connects a corresponding battery sample (any one of battery samples 1 to N) to the analog switch circuit and the discharge circuit by controlling the conduction of a certain relay (any one between relays 1 to N) in the relay circuit; the CPU module then controls the selection of the analog switch circuit and connects the analog signal of the currently connected battery sample to the CPU module; the CPU module measures and calculates the voltage and internal resistance value of the current battery sample through an analog-to-digital converter (ADC), displays the result through the display module, and sends the voltage and internal resistance value to the PC through the serial port; the PC draws the discharge curve and parameters of the current battery sample according to the received voltage and internal resistance value.

[0030] Similarly, the CPU module periodically performs operations of connecting, discharging, collecting, displaying, and sending for other battery samples, and can depict the battery discharge curves of all battery samples.

[0031] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning, or limited experiments based on the concept of the present invention on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A multi-channel battery discharge curve acquisition device for a MOBAD module, comprising a CPU module, a relay circuit, and a display module. The CPU module is communicatively connected to a PC. It is characterized in that, It also includes an analog switch circuit and a discharge circuit. The relay circuit includes multiple relays. One end of each relay is respectively connected to each battery path, and the other end is connected to the discharge circuit. Each relay is also connected to the analog switch circuit. The CPU module is communicatively connected to the relay circuit, the analog switch circuit, and the display module.

2. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The relay circuit includes a small 5V relay and a triode.

3. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The discharge circuit includes a load resistor.

4. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 3, characterized in that, The resistance value of the load resistor is determined by the discharge current required by the battery.

5. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The analog switch circuit includes multiple analog-to-digital converters.

6. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The analog switch circuit includes multiple analog switch chips.

7. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 6, characterized in that, The analog switch chip uses a TMUX1204 chip.

8. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The display module uses an LCD liquid crystal module.

9. The multi-channel battery discharge curve acquisition device for a MOBAD module according to claim 1, characterized in that, The CPU module uses an STM32 chip.

10. A system applying the device according to any one of claims 1-8, characterized in that, The system includes the following operating steps: S1. The CPU module controls the relay circuit to conduct, and connects the battery sample to the analog switch circuit and the discharge circuit. S2. The CPU module controls the selection of the analog switch circuit and receives the analog signal of the current battery sample. S3. The CPU module calculates the voltage and internal resistance value of the current battery sample and displays them through the display module, and sends the voltage and the internal resistance value to the PC. S4. The PC draws the discharge curve of the current battery sample according to the voltage and the internal resistance value.

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