A battery pack CCS wire harness temperature sensing probe detection system

Abstract

The application provides a battery pack CCS wire harness temperature sensing probe detection system, belonging to the technical field of temperature detection, the system comprises several environmental temperature detection circuits for collecting environmental temperature; a channel temperature collection wire harness module is used for connecting the CCS wire harness of the battery pack; a channel temperature detection module is connected with the channel temperature collection wire harness module and is used for collecting the temperature of the CCS wire harness of the battery pack; an LED indicator light module is based on the detection result and is lighted; a controller MCU is connected with the environmental temperature detection circuit, is used for receiving the environmental temperature collected by the several environmental temperature detection circuits, and takes the average of the several environmental temperatures as the final environmental temperature; the channel temperature detection module is connected, the temperature of the CCS wire harness of the battery pack is compared with the final environmental temperature, and a difference value is obtained; the LED indicator light module is also connected, and the LED indicator light module is lighted based on the difference value. It is suitable for on-site detection, simple operation and improved detection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of temperature detection technology, and in particular relates to a temperature sensing probe detection system for a battery pack CCS harness. Background Technology

[0002] In the fields of battery management systems and integrated busbar (CCS) technology, with the rapid development of electric vehicles and energy storage systems, battery pack temperature monitoring has become a critical aspect of ensuring safe operation. As a core connecting component within the battery module, the CCS integrates temperature sampling functionality, and the reliability of its temperature sensing probes directly impacts the performance and maintenance efficiency of the entire battery system. Therefore, efficient and accurate temperature sensing probe detection systems are of great significance for improving battery pack quality control and on-site maintenance.

[0003] Existing wire harness testing equipment is only suitable for pre-shipment testing and cannot meet the rapid testing needs of project sites. Furthermore, the operation process relies on specialized equipment and technicians, making the testing process complex. Summary of the Invention

[0004] This invention provides a battery pack CCS harness temperature sensing probe detection system to at least solve the problems of existing technologies that are difficult to adapt to the rapid inspection needs of project sites, and whose operation process relies on professional equipment and technicians and is complex.

[0005] This application provides a battery pack CCS harness temperature sensing probe detection system, the system comprising: Several ambient temperature detection circuits are used to collect ambient temperature data; Channel temperature acquisition harness module, used to connect to the CCS harness of the battery pack; The channel temperature detection module is connected to the channel temperature acquisition harness module and is used to acquire the temperature of the battery pack CCS harness. The LED indicator module illuminates based on the detection results. The controller MCU is connected to the ambient temperature detection circuit. It receives ambient temperatures collected by several ambient temperature detection circuits and takes the average of these ambient temperatures as the final ambient temperature. The controller MCU is also connected to the channel temperature detection module, which compares the temperature of the battery pack CCS harness with the final ambient temperature to obtain the difference. The controller MCU is also connected to the LED indicator module, which controls the LED indicator module to light up based on the difference.

[0006] Furthermore, the ambient temperature detection circuit includes: a power input VCC, a pull-up resistor R95, a resistor R96, a resistor R97, and a filter capacitor C45. The first end of the pull-up resistor R95 is connected to the power input VCC, and the second end is connected to the first end of the resistor R96 and the first end of the resistor R97. The second end of the resistor R97 is grounded. The second end of the resistor R96 is connected to the first end of the filter capacitor C45 and the voltage signal output terminal TEMP_2. The second end of the filter capacitor C45 is grounded. The voltage signal output terminal TEMP_2 is used to connect to the TEMP_2 pin of the controller MCU.

[0007] Furthermore, the channel temperature detection module includes a channel temperature detection chip U4, a signal output circuit, and a channel temperature input circuit; The power supply pin VCC of the channel temperature detection chip U4 is connected to a 3.3V power supply and is also grounded; the enable pin EN of the channel temperature detection chip U4 is connected to the START pin of the controller MCU through resistor R106; the address selection pin S0 of the channel temperature detection chip U4 is connected to the SA_0 pin of the controller MCU; the address selection pin S1 of the channel temperature detection chip U4 is connected to the SA_1 pin of the controller MCU; and the address selection pin S2 of the channel temperature detection chip U4 is connected to the SA_2 pin of the controller MCU. The channel temperature input circuit contains several diodes, each corresponding to several parallel channel temperature input branches. The first end of the diode is connected to the input channel pin of the channel temperature detection chip U4 and the channel temperature acquisition harness module, and the second end of the diode is grounded. The signal output circuit includes resistors R54 and R55, capacitors C36 and C37. The first end of resistor R54 is connected to a 3.3V power supply, and the second end of resistor R54 is connected to the first end of resistor R55, the first end of capacitor C37, and the Y pin of the channel temperature detection chip U4. The second end of resistor R55 is connected to the TEMP_A pin of the controller MCU, and the second end of capacitor C37 is grounded. The first end of capacitor C36 is connected to the VCC pin of the channel temperature detection chip U4 and the 3.3V power supply, and the second end of capacitor C36 is connected to the GND pin of the channel temperature detection chip U4 and grounded.

[0008] Further, the channel temperature acquisition harness module includes connector J13. The RT1A pin of connector J13 is connected to the I0 pin of channel temperature detection chip U4; the RT2A pin of connector J13 is connected to the I1 pin of channel temperature detection chip U4; the RT3A pin of connector J13 is connected to the I2 pin of channel temperature detection chip U4; the RT4A pin of connector J13 is connected to the I3 pin of channel temperature detection chip U4; the RT5A pin of connector J13 is connected to the I4 pin of channel temperature detection chip U4; the RT6A pin of connector J13 is connected to the I5 pin of channel temperature detection chip U4; the RT7A pin of connector J13 is connected to the I6 pin of channel temperature detection chip U4; and the RT8A pin of connector J13 is connected to the I7 pin of channel temperature detection chip U4.

[0009] Furthermore, the LED indicator module includes: several sets of green indicator circuits and red indicator circuits; The green indicator circuit includes an input power supply VCC_3V3, a green indicator D9, resistors R15 and R16, and an NPN transistor Q6. The positive terminal of the green indicator D9 is connected to the input power supply VCC_3V3, the negative terminal of the green indicator D9 is connected to the first end of resistor R15, the second end of resistor R15 is connected to the collector of NPN transistor Q6, the emitter of NPN transistor Q6 is grounded, and the base of NPN transistor Q6 is connected to the external control signal receiver LED_4 through resistor R16. The external control signal receiver LED_4 is used to connect to the LED_4 pin of the controller MCU. The red indicator circuit includes the input power supply VCC_3V3, the red indicator D5, resistor R7, resistor R8, and NPN transistor Q2. The positive terminal of the red indicator D5 is connected to the input power supply VCC_3V3, and the negative terminal of the red indicator D5 is connected to the first end of resistor R7. The second end of resistor R7 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 is grounded, and the base of NPN transistor Q2 is connected to the external control signal receiver LED_3 through resistor R8. The external control signal receiver LED_3 is used to connect to the LED_3 pin of the controller MCU.

[0010] Furthermore, the system also includes an LED interface circuit; The LED interface circuit includes an LED power supply circuit, a display interface J11, and a display interface J12; Display interface J11 and display interface J12 are two identical 8-pin interfaces; among them, display interface J11 includes VCC_LCD pin, GND pin, LCD_MOSI pin, LCD_SCK pin, LCD_CS pin, LCD_MISO pin, LCD_RS pin and LCD_BLK pin; The VCC_LCD pin is used to connect to the LED power supply circuit, drawing power from the LED power supply circuit to power the screen; the GND pin is used to connect to ground; the LCD_MOSI pin is the master output / slave input pin, connected to the PB15 pin of the controller MCU; the LCD_SCK pin is the clock pin, connected to the PB13 pin of the controller MCU; the LCD_CS pin is the chip select pin, connected to the PB12 pin of the controller MCU, used to select the LCD screen; the LCD_MISO pin is the master input / slave output pin, connected to the PB14 pin of the controller MCU; the LCD_RS pin is the register select pin, connected to the PC5 pin of the controller MCU; the LCD_BLK pin is the backlight control pin, connected to the PB1 pin of the controller MCU. The LED power supply circuit includes resistors R122 and R123 connected in parallel. The first end of resistor R122 is connected to power supply VCC_3V3 for inputting 3.3V voltage, and the first end of resistor R123 is connected to 5V voltage. When the second terminals of resistor R122 and resistor R123 are connected, the output power VCC_LED is generated. The VCC_LED pin of display interface J11 and the VCC_LED pin of display interface J12 are both connected to the power supply VCC_LED of the LED power supply circuit.

[0011] Furthermore, the system also includes a digital input interface protection circuit, which includes a signal receiving port ADD-DI, a pull-up resistor R105, a diode D61, a capacitor C48, and a signal output port MCU-ADD-DI. The power supply VCC_3V3 is connected to the signal receiving port ADD-DI through a pull-up resistor R105. The signal receiving port ADD-DI is used to receive external signals. The cathode of diode D61 is connected to the power supply VCC_3V3, and the anode of diode D61 is grounded. The first end of capacitor C48 is connected to the signal receiving port ADD-DI and the signal output port MCU-ADD-DI, and the second end of capacitor C48 is grounded. The signal output port MCU-ADD-DI is used to connect to the MCU-ADD-DI pin of the controller MCU.

[0012] Furthermore, the system also includes a power supply circuit, which includes a power input interface POWER+, a voltage regulator chip U9, a capacitor C49, and a capacitor C50; the first end of capacitor C49 is connected to the power input interface POWER+, and the second end of capacitor C49 is grounded. The input pin of the voltage regulator chip U9 is connected to the first terminal of capacitor C49, the ground pin of the voltage regulator chip U9 is grounded, and the output pin of the voltage regulator chip U9 outputs a stable +5V voltage. The first terminal of capacitor C50 is connected to the +5V output, and the second terminal of capacitor C50 is grounded.

[0013] Furthermore, the system also includes a power supply communication module and a CAN communication module; The power supply and communication module includes connector J4. The power output pin of connector J4 is connected to the power input interface POWER+ of the power supply circuit; the digital input pin of connector J4 is connected to the signal receiving port ADD-DI of the digital input interface protection circuit; and both the high-level signal line pin and the low-level signal line pin of connector J4 are connected to the CAN communication module.

[0014] Furthermore, the CAN communication module includes a CAN transceiver chip U2, the data input pin TXD of the CAN transceiver chip U2 is connected to the CAN_TX pin of the controller MCU; the data output pin RX of the CAN transceiver chip U2 is connected to the CAN_RX pin of the controller MCU; and the control pin STB of the CAN transceiver chip U2 is connected to the CAN_STB pin of the controller MCU. The VCC pin of the CAN transceiver chip U2 is connected to a 3.3V power supply and to the first end of capacitor C10. The second end of capacitor C10 is connected to the GND pin of the CAN transceiver chip U2 and grounded. The SPLIT pin of the CAN transceiver chip U2 is connected to ground after being connected to capacitor C15; The CAN communication module also includes a common-mode choke L3, resistors R103, R104, R101, capacitors C12 and C47, and a bidirectional TVS diode array U8. The first end of the common mode choke L3 is connected to the CANL pin of the CAN transceiver chip U2, the fourth end of the common mode choke L3 is connected to the CANH pin of the CAN transceiver chip U2, the first end of the resistor R103 is connected to the CANL pin of the CAN transceiver chip U2, the second end of the resistor R104 is connected to the CANH pin of the CAN transceiver chip U2, and the second ends of both the resistor R103 and the resistor R104 are grounded. The second end of the common-mode choke L3 is connected to the first end of capacitor C12, the first end of resistor R101, the second end of bidirectional TVS diode array U8, and the CAN_L pin of the power supply and communication module; the second end of capacitor C12 is grounded. The third terminal of the common-mode choke L3 is connected to the second terminal of resistor R101, the first terminal of capacitor C47, the first terminal of bidirectional TVS diode array U8, and the CAN_H pin of the power supply and communication module. The third terminal of bidirectional TVS diode array U8 is grounded.

[0015] As can be seen from the above technical solutions, the present invention has the following advantages: The battery pack CCS harness temperature sensing probe detection system provided in this application integrates an ambient temperature detection circuit, a channel temperature acquisition harness module, a channel temperature detection module, and an LED indicator module. The controller MCU automatically collects several average ambient temperatures as a benchmark, compares them with the battery pack CCS harness temperature to obtain the difference, and then controls the LED to light up. This solves the shortcomings of existing harness detection equipment, which is bulky and difficult to adapt to the rapid inspection needs of project sites. It realizes the compact and portable deployment of the equipment, which can be flexibly applied to the battery pack integration site without relying on fixed workstations and complex infrastructure.

[0016] This application addresses the shortcomings of existing equipment that require frequent tooling changes due to the diverse specifications of CCS harness connectors by using a standard interface design for the channel temperature acquisition harness module, combined with an expandable channel temperature detection circuit. It achieves broad compatibility with different pin definitions and channel numbers, reduces the number of adapter accessories and debugging time, and enhances the system's versatility and economy.

[0017] This application directly outputs a lighting signal based on the difference calculated by the controller MCU through the LED indicator module. This solves the shortcomings of existing equipment, which requires the analysis of test results through host computer software, has a complex operation process, and relies on professional technicians for interpretation. It realizes the intuitive and real-time presentation of test results, allowing ordinary staff to quickly judge the status of the temperature sensor, significantly reducing the operation threshold and training costs.

[0018] This application uses a controller MCU to quickly average multiple ambient temperature data and compares the average with the harness temperature collected by the channel temperature detection module in real time. This solves the shortcomings of existing equipment, such as long detection cycles and inability to match the pace of automated battery pack integration. It achieves high-throughput continuous detection, significantly improves inspection efficiency, and meets the timeliness requirements of assembly line operations. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a circuit diagram of the controller MCU of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0021] Figure 2 This is a circuit diagram of the channel temperature acquisition harness module of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0022] Figure 3 This is a circuit diagram of the ambient temperature detection circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0023] Figure 4 This is a circuit diagram of the green indicator light circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0024] Figure 5 This is a circuit diagram of the red indicator light circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0025] Figure 6 This is a circuit diagram of the power supply circuit for the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0026] Figure 7 This is a circuit diagram of the digital input interface protection circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0027] Figure 8 This is a circuit diagram of the LCD interface circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention.

[0028] Figure 9 This is a circuit diagram of the channel temperature input circuit of the battery pack CCS harness temperature sensing probe detection system described in this invention. Detailed Implementation

[0029] To make the purpose, features, and advantages of this application more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solution protected by this application. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this patent.

[0030] The key terms used in this invention will be explained below.

[0031] Battery Management System (BMS) is mainly used in electric vehicles, energy storage systems, uninterruptible power supplies (UPS) and other fields to monitor, protect, balance and manage the status of battery packs, ensuring the safe and efficient operation of batteries.

[0032] The integrated busbar (Cells Contact System, CCS) consists of voltage signal acquisition components, temperature signal acquisition components (NTC), plastic structural parts, and copper / aluminum busbars, connected by thermoforming or riveting processes. It is used in new energy vehicles and energy storage battery modules to achieve series and parallel connection of cells, temperature and voltage sampling, and transmission of information to the BMS system. As an internal electrical connection component of the battery pack / module, the sampling components, manufacturing process, and material selection of the integrated busbar (CCS) are influenced by factors such as cell assembly method, battery pack calibration parameters, operating environment, space, and weight.

[0033] This application provides a battery pack CCS harness temperature sensing probe detection system, which solves the current technical problem of urgently needing a rapid inspection system that is difficult to adapt to the needs of project sites, and whose operation process relies on professional equipment and technicians and is complex.

[0034] The technical solutions proposed in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0035] This application provides a battery pack CCS wiring harness temperature sensing probe detection system, the system comprising: Several ambient temperature detection circuits are used to collect ambient temperature data; Channel temperature acquisition harness module, used to connect to the CCS harness of the battery pack; The channel temperature detection module is connected to the channel temperature acquisition harness module and is used to acquire the temperature of the battery pack CCS harness. The LED indicator module illuminates based on the detection results. The controller MCU is connected to the ambient temperature detection circuit. It receives ambient temperatures collected by several ambient temperature detection circuits and takes the average of these ambient temperatures as the final ambient temperature. The controller MCU is also connected to the channel temperature detection module, which compares the temperature of the battery pack CCS harness with the final ambient temperature to obtain the difference. The controller MCU is also connected to the LED indicator module, which controls the LED indicator module to light up based on the difference.

[0036] In one embodiment, the system includes several ambient temperature detection circuits based on negative temperature coefficient thermistors. The controller MCU is connected to the ambient temperature detection circuits and is used to receive the ambient temperatures collected by the several ambient temperature detection circuits, take the average of the several ambient temperatures as the final ambient temperature, and display it through the display module.

[0037] The ambient temperature detection circuit includes: a power input VCC, a pull-up resistor R95, a resistor R96, a resistor R97, and a filter capacitor C45. The first end of the pull-up resistor R95 is connected to the power input VCC, and the second end is connected to the first end of the resistor R96 and the first end of the resistor R97. The second end of the resistor R97 is grounded. The second end of the resistor R96 is connected to the first end of the filter capacitor C45 and the voltage signal output terminal TEMP_2. The second end of the filter capacitor C45 is grounded. The voltage signal output terminal TEMP_2 is used to connect to the TEMP_2 pin of the controller MCU.

[0038] Combination Figure 3 The ambient temperature detection circuit uses a resistor voltage divider network to convert temperature changes into voltage changes.

[0039] The ambient temperature detection circuit is powered by a stable 3.3V power supply from the power input VCC. A 10kΩ pull-up resistor R95 is connected to the power input VCC at one end and to node A of the circuit at the other. An NTC thermistor R97 is connected at one end to node A and to ground at the other. The signal from node A passes through a 150Ω resistor R96 and outputs an analog voltage signal to the voltage output terminal TEMP_2. This analog voltage signal is then sent to the TEMP_2 pin of the controller MCU. A 0.1µF filter capacitor C45 is connected in parallel between node A and ground to stabilize the analog voltage signal and absorb high-frequency noise interference.

[0040] This ambient temperature detection circuit is based on the physical characteristics of NTC thermistors and Ohm's law, realizing the conversion from temperature to resistance and then to an analog voltage signal. The resistance value of resistor R97 decreases as the temperature increases; when the ambient temperature rises, the resistance value of resistor R97 decreases; when the ambient temperature falls, the resistance value of resistor R97 increases.

[0041] A fixed-value resistor R95 and a variable-value resistor R97 together form a voltage divider. According to Ohm's law, the voltage at node A is calculated as follows: ; in, This indicates the voltage magnitude at node A. Indicates the magnitude of the input power supply voltage. This indicates the resistance value of resistor R97. This indicates the resistance value of resistor R95.

[0042] When the ambient temperature rises, the resistance of resistor R97 decreases, and the denominator in the formula... The sum decreases, but the molecule... Become smaller, eventually The voltage decreases. When the ambient temperature decreases, the resistance of resistor R97 increases, and the numerator in the formula... Get bigger, eventually The voltage increases.

[0043] The function of the filter capacitor C45 is to filter and absorb the high-frequency spikes generated at node A by power fluctuations or external electromagnetic interference, making the output analog voltage signal smoother and more stable, thereby improving the measurement accuracy of the controller MCU.

[0044] The function of resistor R96 is isolation and protection. It limits the current flowing from the voltage divider circuit to the TEMP_2 pin of the controller MCU. Especially during the moment when the internal capacitor of the TEMP_2 pin is charging, it can prevent impact on the sensitive voltage divider point and also enhance the circuit's anti-electrostatic discharge (ESD) capability.

[0045] After the TEMP_2 pin of the controller MCU reads the analog voltage signal, it converts it into a digital quantity.

[0046] It should be noted that the system described in this invention includes two ambient temperature detection circuits, combined with... Figure 1 The analog voltage signal acquired by the first ambient temperature detection circuit is read by the TEMP_2 pin of the controller MCU, and the analog voltage signal acquired by the second ambient temperature detection circuit is read by the TEMP_1 pin of the controller MCU.

[0047] The channel temperature detection module includes a channel temperature detection chip U4, a signal output circuit, and a channel temperature input circuit. The power supply pin VCC of the channel temperature detection chip U4 is connected to a 3.3V power supply and is also grounded. The enable pin EN of the channel temperature detection chip U4 is connected to the START pin of the controller MCU through a resistor R106. The START pin of the controller MCU is used to control the start and stop of the entire temperature detection circuit. The address selection pin S0 of the channel temperature detection chip U4 is connected to the SA_0 pin of the controller MCU. The address selection pin S1 of the channel temperature detection chip U4 is connected to the SA_1 pin of the controller MCU. The address selection pin S2 of the channel temperature detection chip U4 is connected to the SA_2 pin of the controller MCU. By inputting different high and low levels to these three address selection pins, the controller MCU can select any channel in the channel temperature input circuit to be turned on.

[0048] The channel temperature input circuit contains several diodes, each corresponding to several parallel channel temperature input branches. The first end of the diode is connected to the input channel pin of the channel temperature detection chip U4 and the channel temperature acquisition harness module, and the second end of the diode is grounded. The signal output circuit includes resistors R54 and R55, capacitors C36 and C37. The first end of resistor R54 is connected to a 3.3V power supply, and the second end of resistor R54 is connected to the first end of resistor R55, the first end of capacitor C37, and the Y pin of the channel temperature detection chip U4. The second end of resistor R55 is connected to the TEMP_A pin of the controller MCU, and the second end of capacitor C37 is grounded. The first end of capacitor C36 is connected to the VCC pin of the channel temperature detection chip U4 and the 3.3V power supply, and the second end of capacitor C36 is connected to the GND pin of the channel temperature detection chip U4 and grounded.

[0049] The working principle of the channel temperature detection module can be summarized as time-division multiplexing and gating detection, and the specific process is as follows: 1. Standby mode: When the signal received by the EN pin of the channel temperature detection chip U4 from the START pin of the controller MCU is low, the channel temperature detection chip U4 is disabled (EN pin is invalid), and all internal switches are open. At this time, the circuit does not operate, power consumption is extremely low, and the TEMP_A pin of the channel temperature detection chip U4 has no valid signal output.

[0050] 2. Startup and Channel Selection: When temperature needs to be detected, the START pin of the controller MCU outputs a high level, and the EN pin of the channel temperature detection chip U4 is enabled after receiving the high level signal.

[0051] Meanwhile, the controller MCU selects a temperature channel to be read by setting the levels of the three address pins S0, S1, and S2. For example, setting S2=0, S1=0, and S0=0 selects channel 0 (connected to RT1A); setting S2=0, S1=0, and S0=1 selects channel 1 (connected to RT2A), and so on.

[0052] Temperature-to-voltage conversion: Once a channel is selected, the corresponding diode turns on, connecting that channel to the output terminal. At this point, the circuit forms a measurement loop.

[0053] 3. Signal Output and Processing: This voltage signal, representing temperature, is sent out from the signal output circuit and is known as the TEMP_A signal.

[0054] On the output path, the signal output circuit consisting of resistor R86, resistor R87, and capacitor C38 absorbs glitches and high-frequency interference in the signal, resulting in a clean and stable analog voltage signal.

[0055] Finally, this smooth voltage signal is sent to the TEMP_A pin of the controller MCU. The controller MCU reads this voltage value and, based on the known temperature-resistance characteristic curve, calculates the specific temperature value of the current measured point.

[0056] 4. Loop detection: By rapidly and sequentially changing the addresses of S0-S2, the controller can select eight channels in turn, enabling time-sharing temperature detection at eight different locations using a single chip and circuit. This method significantly saves hardware resources and the TEMP_A pin of the controller MCU.

[0057] The channel temperature acquisition harness module includes connector J13. The RT1A pin of connector J13 is connected to the I0 pin of channel temperature detection chip U4; the RT2A pin of connector J13 is connected to the I1 pin of channel temperature detection chip U4; the RT3A pin of connector J13 is connected to the I2 pin of channel temperature detection chip U4; the RT4A pin of connector J13 is connected to the I3 pin of channel temperature detection chip U4; the RT5A pin of connector J13 is connected to the I4 pin of channel temperature detection chip U4; the RT6A pin of connector J13 is connected to the I5 pin of channel temperature detection chip U4; the RT7A pin of connector J13 is connected to the I6 pin of channel temperature detection chip U4; and the RT8A pin of connector J13 is connected to the I7 pin of channel temperature detection chip U4.

[0058] Specifically, in combination Figure 9 and Figure 2 The channel temperature input circuit contains eight diodes: D27, D28, D29, D30, D31, D32, D33, and D34. The first terminal of diode D27 is connected to pin I0 of channel temperature detection chip U4 and pin RT1A of channel temperature acquisition harness module, and the second terminal of diode D27 is grounded; the first terminal of diode D28 is connected to pin I1 of channel temperature detection chip U4 and pin RT2A of channel temperature acquisition harness module, and the second terminal of diode D28 is grounded; the first terminal of diode D29 is connected to pin I2 of channel temperature detection chip U4 and pin RT3A of channel temperature acquisition harness module, and the second terminal of diode D29 is grounded; the first terminal of diode D30 is connected to pin I3 of channel temperature detection chip U4 and pin RT4A of channel temperature acquisition harness module, and the second terminal of diode D30 is grounded. The first terminal of diode D31 is connected to pin I4 of channel temperature detection chip U4 and pin RT5A of channel temperature acquisition harness module, and the second terminal of diode D31 is grounded; the first terminal of diode D32 is connected to pin I5 of channel temperature detection chip U4 and pin RT6A of channel temperature acquisition harness module, and the second terminal of diode D32 is grounded; the first terminal of diode D33 is connected to pin I6 of channel temperature detection chip U4 and pin RT7A of channel temperature acquisition harness module, and the second terminal of diode D33 is grounded; the first terminal of diode D34 is connected to pin I7 of channel temperature detection chip U4 and pin RT8A of channel temperature acquisition harness module, and the second terminal of diode D34 is grounded.

[0059] The LED indicator module includes: several sets of green indicator circuits and red indicator circuits; The green indicator circuit includes an input power supply VCC_3V3, a green indicator D9, resistors R15 and R16, and an NPN transistor Q6. The positive terminal of the green indicator D9 is connected to the input power supply VCC_3V3, the negative terminal of the green indicator D9 is connected to the first end of resistor R15, the second end of resistor R15 is connected to the collector of NPN transistor Q6, the emitter of NPN transistor Q6 is grounded, and the base of NPN transistor Q6 is connected to the external control signal receiver LED_4 through resistor R16. The external control signal receiver LED_4 is used to connect to the LED_4 pin of the controller MCU. Combination Figure 4The green indicator circuit controls the on / off state of the green indicator D9, using an NPN transistor Q6 as a switch for efficient control. The green indicator circuit is powered by a 3.3V input power supply VCC_3V3, which is directly connected to the positive terminal of the green indicator D9. The negative terminal of the green indicator D9 is connected to the collector of the NPN transistor Q6 (MMBT5551, SOT-23-3 package) through a 150Ω resistor R15 in a 0805 package. The emitter of the NPN transistor Q6 is directly connected to ground. The base of the NPN transistor Q6 is connected to the external control signal receiver LED_4 through a 4.7kΩ resistor R16 in a 0805 package. The external control signal receiver LED_4 receives control signals from the controller MCU, which determine the state of the LED. Resistor R16 limits the base current, protecting the NPN transistor Q6.

[0060] The green indicator light circuit uses the switching characteristics of NPN transistor Q6 to control the on / off state of green indicator light D9. Its working principle is based on the level of the control signal received by the external control signal receiver LED_4. When the received control signal is low: The base of NPN transistor Q6 is pulled low through resistor R16, making the base-emitter voltage of Q6 positive, and Q6 enters the conducting state. Current flows from the input power supply VCC_3V3, through the green indicator light D9, resistor R15, and the NPN transistor Q6 (collector to emitter) to GND, forming a complete circuit, causing the green indicator light D9 to illuminate. The function of resistor R15 is to limit the current magnitude, preventing overcurrent damage to the green indicator light D9 and the NPN transistor Q6. According to Ohm's law, the current I ≈ (VCC - V_LED - V_CE_sat) / R15, where V_LED is approximately 2V, representing the voltage drop across the green indicator light D9, and V_CE_sat is the saturation voltage drop of the NPN transistor Q6, approximately 0.2V, ensuring the current remains within a safe range.

[0061] When the received control signal is high: When the base voltage of NPN transistor Q6 increases, the base-emitter voltage of Q6 is insufficient to turn it on, and Q6 is cut off. The current loop is broken, and no current flows through the green indicator light D9, so it remains off. Resistor R16 acts as a pull-up resistor in this state to prevent false turn-on.

[0062] NPN transistor Q6, as an electronic switch, has a fast response speed and low power consumption, making it suitable for direct driving by the MCU controller. Resistor R15 protects the green indicator D9 and NPN transistor Q6; resistor R16 prevents overdrive base current. The blinking of the green indicator D9 can be easily achieved by changing the level of the control signal received by the external control signal receiver LED_4.

[0063] The red indicator circuit includes the input power supply VCC_3V3, the red indicator D5, resistor R7, resistor R8, and NPN transistor Q2. The positive terminal of the red indicator D5 is connected to the input power supply VCC_3V3, and the negative terminal of the red indicator D5 is connected to the first end of resistor R7. The second end of resistor R7 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 is grounded, and the base of NPN transistor Q2 is connected to the external control signal receiver LED_3 through resistor R8. The external control signal receiver LED_3 is used to connect to the LED_3 pin of the controller MCU.

[0064] Combination Figure 5 The red indicator circuit controls the on / off state of the red indicator D5, using an NPN transistor Q2 as a switch for efficient control. The red indicator circuit is powered by a 3.3V input power supply VCC_3V3, which is directly connected to the positive terminal of the red indicator D5. The negative terminal of the red indicator D5 is connected to the collector of the NPN transistor Q2 (MMBT5551, SOT-23-3 package) through a 150Ω resistor R7 in a 0805 package. The emitter of the NPN transistor Q2 is directly connected to ground. The base of the NPN transistor Q2 is connected to the external control signal receiver LED_3 through a 4.7kΩ resistor R8 in a 0805 package. The external control signal receiver LED_3 receives control signals from the controller MCU, which determine the state of the LED. Resistor R8 limits the base current, protecting the NPN transistor Q2.

[0065] The red indicator light circuit uses the switching characteristics of NPN transistor Q2 to control the on / off state of the red indicator light D5. Its working principle is based on the level of the control signal received by the external control signal receiver LED_3. When the received control signal is low: The base of NPN transistor Q2 is pulled low through resistor R8, making the base-emitter voltage of Q2 positive, and Q2 enters the conducting state. Current flows from the input power supply VCC_3V3, through the red indicator light D5, resistor R7, and the NPN transistor Q2 (collector to emitter) to GND, forming a complete circuit, causing the red indicator light D5 to illuminate. Resistor R7 limits the current magnitude to prevent overcurrent damage to the red indicator light D5 and the NPN transistor Q2. According to Ohm's law, the current I ≈ (VCC - V_LED - V_CE_sat) / R7, where V_LED is approximately 2V, representing the voltage drop across the red indicator light D5, and V_CE_sat is the saturation voltage drop of the NPN transistor Q2, approximately 0.2V, ensuring the current remains within a safe range.

[0066] When the received control signal is high: When the base voltage of NPN transistor Q2 rises, the base-emitter voltage of Q2 is insufficient to turn it on, and Q2 is cut off. The current loop is broken, and no current flows through the red indicator light D5, so it turns off. Resistor R8 acts as a pull-up resistor in this state to prevent false turn-on. NPN transistor Q2, as an electronic switch, has a fast response speed and low power consumption, making it suitable for direct drive by the MCU. Resistor R7 protects the red indicator light D5 and NPN transistor Q2; resistor R8 prevents overdrive of the base current. The blinking of the red indicator light D5 can be easily achieved by changing the level of the control signal received at the external control signal receiver LED_3.

[0067] It should be noted that, in combination Figure 1 In this embodiment, the LED indicator module has four sets of green indicator circuits and four sets of red indicator circuits, which are respectively connected to the LED_1, LED_2, LED_3, LED_4, LED_5, LED_6, LED_7, and LED_8 pins of the controller MCU. Specifically, the LED_1 pin of the controller MCU is connected to the red indicator circuit in the first set; the LED_2 pin is connected to the green indicator circuit in the first set; the LED_3 pin is connected to the red indicator circuit in the second set; the LED_4 pin is connected to the green indicator circuit in the second set; the LED_5 pin is connected to the red indicator circuit in the third set; the LED_6 pin is connected to the green indicator circuit in the third set; the LED_7 pin is connected to the red indicator circuit in the fourth set; and the LED_8 pin is connected to the green indicator circuit in the fourth set.

[0068] The system also includes an LED interface circuit; The LED interface circuit includes an LED power supply circuit, a display interface J11, and a display interface J12; Display interface J11 and display interface J12 are two identical 8-pin interfaces; among them, display interface J11 includes VCC_LCD pin, GND pin, LCD_MOSI pin, LCD_SCK pin, LCD_CS pin, LCD_MISO pin, LCD_RS pin and LCD_BLK pin; The VCC_LCD pin is used to connect to the LED power supply circuit, drawing power from the LED power supply circuit to power the screen; the GND pin is used to connect to ground; the LCD_MOSI pin is the master output / slave input pin, connected to the PB15 pin of the controller MCU; the LCD_SCK pin is the clock pin, connected to the PB13 pin of the controller MCU; the LCD_CS pin is the chip select pin, connected to the PB12 pin of the controller MCU, used to select the LCD screen; the LCD_MISO pin is the master input / slave output pin, connected to the PB14 pin of the controller MCU; the LCD_RS pin is the register select pin, connected to the PC5 pin of the controller MCU; the LCD_BLK pin is the backlight control pin, connected to the PB1 pin of the controller MCU. The LED power supply circuit includes resistors R122 and R123 connected in parallel. The first end of resistor R122 is connected to power supply VCC_3V3 for inputting 3.3V voltage, and the first end of resistor R123 is connected to 5V voltage. When the second terminals of resistor R122 and resistor R123 are connected, the output power VCC_LED is generated. The VCC_LED pin of display interface J11 and the VCC_LED pin of display interface J12 are both connected to the power supply VCC_LED of the LED power supply circuit.

[0069] Figure 8 For LCD interface circuitry, an interface module for a 1.3-inch LCD (liquid crystal display) design is demonstrated, providing flexible power configuration and a redundant SPI communication interface.

[0070] Combination Figure 8 The LCD interface circuit includes a power supply VCC_LED and an LED power supply circuit. The power supply VCC_LED obtains power through the LED power supply circuit and provides the operating voltage for the LCD screen. The LED power supply circuit includes two independent lines: Line 1: Obtain power from VCC_3V3 through resistor R122; Line 2: Obtain from the +5V power supply through resistor R123. By using resistors R122 or R123, you can select whether the LCD operates at 3.3V or 5V, thus ensuring compatibility with LCD screens of different voltage levels. The circuit board features two identical 8-pin interfaces: J11 and J12. This dual-interface design allows for the simultaneous connection of two screens. The pin definitions for each interface are completely identical, including: The VCC_LCD pin is used to connect to the LED power supply circuit, drawing power from the LED power supply circuit to power the screen; the GND pin is used to connect to ground. The LCD_MOSI pin is the master output / slave input pin, which is connected to the PB15 pin of the controller MCU; The LCD_SCK pin is a clock pin, which is connected to the PB13 pin of the controller MCU; The LCD_CS pin is the chip select pin, which is connected to the PB12 pin of the controller MCU and is used to select the LCD screen. The LCD_MISO pin is a master input / slave output pin, which is connected to the PB14 pin of the controller MCU. The LCD_RS pin is the register select pin, which is connected to the PC5 pin of the controller MCU; the controller MCU controls the display data through the PC5 pin. The LCD_BLK pin is the backlight control pin, which is connected to the PB1 pin of the controller MCU; the brightness of the screen backlight is adjusted by the pulse width modulation signal PWM.

[0071] The LCD interface circuit works by having the MCU (Microcontroller Unit) send commands and image data to the LCD screen via the SPI communication protocol, thereby controlling its displayed content. The specific process is as follows: Power-on and initialization: After the system is powered on, the VCC_LCD pin receives a voltage of 3.3V or 5V depending on resistor R122 or resistor R123, which powers the connected LCD screen. The controller MCU first sets the LCD_BLK pin to a high level or outputs a PWM signal to turn on the screen backlight. The controller MCU selects the target LCD screen (J11 or J12) by pulling the level of the LCD_CS pin low. Subsequently, the controller MCU sends a series of initialization commands through the LCD_SCK (clock), LCD_MOSI (data output), and LCD_RS (command / data select) pins, according to the timing requirements provided by the LCD screen manufacturer. These commands are used to set parameters such as the screen's scanning mode, color mode, and brightness. Data shows: After initialization is complete, the controller MCU begins to refresh the displayed content. When the screen needs to be updated, the controller MCU first pulls LCD_CS low to select the screen. Then, set the LCD_RS pin to low level to indicate that the next thing to be sent is a "command", that is, to set the starting address for writing to the video memory. Synchronized with the LCD_SCK clock, the controller MCU sends the command word bit by bit to the LCD screen via the LCD_MOSI pin. After sending the command, the controller MCU sets the LCD_RS pin to a high level, indicating that the next thing to be sent is "data", that is, the actual pixel color value. Next, the MCU, under clock synchronization, sends the byte stream representing the image data through the LCD_MOSI pin. The LCD screen controller stores this data in the display memory and immediately displays it on the screen. By connecting two resistors in parallel, the circuit can be adapted to LCD screens with different operating voltages, thus enhancing its versatility and compatibility. It is equipped with two display interfaces, J12 and J11, which can connect two screens, improving the system's reliability and scalability. The LED interface circuit uses the standard SPI protocol to convert the digital signals from the controller MCU into a visible image on the screen.

[0072] The system also includes a digital input interface protection circuit, which includes a signal receiving port ADD-DI, a pull-up resistor R105, a diode D61, a capacitor C48, and a signal output port MCU-ADD-DI. The power supply VCC_3V3 is connected to the signal receiving port ADD-DI through a pull-up resistor R105. The signal receiving port ADD-DI is used to receive external signals. The cathode of diode D61 is connected to the power supply VCC_3V3, and the anode of diode D61 is grounded. The first end of capacitor C48 is connected to the signal receiving port ADD-DI and the signal output port MCU-ADD-DI, and the second end of capacitor C48 is grounded. The signal output port MCU-ADD-DI is used to connect to the MCU-ADD-DI pin of the controller MCU.

[0073] The digital input interface protection circuit safely and reliably transmits external signals to the MCU-ADD-DI pin of the controller MCU. Combined with... Figure 7The power supply VCC_3V3 is connected to the signal receiving port ADD-DI via a 10kΩ pull-up resistor R105, and external signals are introduced through the signal receiving port ADD-DI. The cathode of diode D61 is connected to the power supply VCC_3V3, and the anode of diode D61 is grounded. The first terminal of capacitor C48 is connected to both the signal receiving port ADD-DI and the signal output port MCU-ADD-DI, and the second terminal of capacitor C48 is grounded. Capacitor C48 is a 0.1µF capacitor and serves as a filter. The signal output port MCU-ADD-DI is used to connect to the MCU-ADD-DI pin of the controller MCU. The digital input interface protection circuit provides triple protection for the MCU-ADD-DI pin of the controller MCU through the coordinated operation of three components: pull-up resistor R105, diode D61, and capacitor C48. This protection includes status determination, overvoltage protection, and anti-interference.

[0074] Among them, the pull-up resistor R105 provides a definite default state. When the signal receiving port ADD-DI is in a high impedance state, disconnected or not connected, the pull-up resistor R105 pulls the voltage of the signal receiving port ADD-DI to a definite logic high level through the power supply VCC_3V3. This ensures that the controller MCU does not read a floating, noise-sensitive, uncertain signal, but a stable logic '1', preventing program misjudgment. Diode D61 provides overvoltage protection, specifically protecting the MCU's MCU-ADD-DI pin from both positive and negative overvoltage. If a voltage higher than the power supply VCC_3V3 is introduced into the signal receiving port ADD-DI, the cathode voltage of diode D61 will be lower than the anode voltage. Diode D61 will immediately conduct in the forward direction, discharging the excessive current to the power supply VCC_3V3, thus clamping the input voltage within the safe range of VCC_3V3 + 0.7V (diode forward voltage drop). Similarly, if a negative voltage is introduced, the path from diode D61 to ground will conduct in the forward direction, clamping the voltage to approximately -0.7V, preventing the negative voltage from damaging the MCU. Capacitor C48 is used for interference suppression and signal smoothing. When the signal level changes rapidly, it provides instantaneous current to stabilize the node voltage, ensuring that the signal sent to the controller MCU is clean and stable, and avoiding level jitter and false triggering caused by noise.

[0075] The system also includes a power supply circuit, which includes a power input interface POWER+, a voltage regulator chip U9, a capacitor C49, and a capacitor C50; the first end of capacitor C49 is connected to the power input interface POWER+, and the second end of capacitor C49 is grounded. The input pin of the voltage regulator chip U9 is connected to the first terminal of capacitor C49, the ground pin of the voltage regulator chip U9 is grounded, and the output pin of the voltage regulator chip U9 outputs a stable +5V voltage. The first terminal of capacitor C50 is connected to the +5V output, and the second terminal of capacitor C50 is grounded.

[0076] The power supply circuit is a linear regulated power supply circuit, designed to stably convert a relatively high input voltage into a +5V DC output voltage. Combined with... Figure 6 The arrow marked POWER+ on the left side of the power supply circuit represents the power input interface POWER+. The power input interface POWER+ is the power input of the entire power supply circuit, and it is usually connected to an unregulated or pre-filtered DC voltage.

[0077] The input voltage first passes through a 10 microfarad, 50V capacitor C49. One terminal of capacitor C49 is connected to the power input interface POWER+, and the other terminal is grounded. The function of capacitor C49 is to smooth the input voltage, absorb instantaneous high-voltage pulses and noise from the power input interface POWER+, and provide a relatively clean input for the voltage regulator chip U9.

[0078] The input pin of the voltage regulator chip U9 is connected to the first end of the capacitor C49, the ground pin of the voltage regulator chip U9 is grounded, and the output pin of the voltage regulator chip U9 outputs a stable +5V voltage.

[0079] The +5V voltage output from the output pin of the voltage regulator chip U9 is filtered by a 22µF, 25V capacitor C50. The first terminal of capacitor C50 is connected to the +5V output, and the second terminal is grounded. Capacitor C50 filters out high-frequency noise in the output voltage and provides instantaneous current to maintain voltage stability when the load current changes suddenly. The output voltage is 5V DC, used to power other electrical modules in the system.

[0080] The voltage regulator chip U9, model K7805-500R3, is the core of the entire power supply circuit and is a three-terminal linear regulator. The power supply circuit relies on the internal regulation mechanism of the U9 chip to achieve a stable conversion between high-voltage input and low-voltage output. The U9 chip internally contains a precision voltage reference, an error amplifier, and a regulating transistor. When the voltage input to the POWER+ interface is higher than its internal reference voltage, the error amplifier drives the regulating transistor to dissipate the excess voltage, thus ensuring that the output pin is always accurately maintained at +5V. During this process, the excess voltage energy is dissipated as heat. Therefore, when the input-output voltage difference is too large or the output current is high, the chip needs to be fitted with a heatsink to prevent overheating damage.

[0081] Capacitor C49 absorbs surge current and interference from the input power line, preventing these disturbances from affecting the stable operation of the voltage regulator chip U9. It also protects the voltage regulator chip U9 from input voltage spikes. Capacitor C50 serves the load side; when the load requires a large instantaneous current, capacitor C50 can quickly discharge to compensate, preventing the output voltage from dropping instantly due to insufficient response and ensuring the stable operation of the load equipment. The power supply circuit, through the K7805-500R3 voltage regulator chip U9, efficiently and accurately converts the unstable, high DC input voltage into a stable +5V DC voltage.

[0082] The system also includes a power supply and communication module and a CAN communication module; The power supply and communication module includes connector J4. The power output pin of connector J4 connects to the power input interface POWER+ of the power supply circuit; DC power is output from this pin to provide operating power to the connected power supply circuit. The digital input pin of connector J4 connects to the signal receiving port ADD-DI of the digital input interface protection circuit; the digital input pin is used for digital input, and during operation, a switching signal ("0" or "1") is emitted through the level of the digital input pin. Both the high-level and low-level signal lines of connector J4 are connected to the CAN communication module. The high-level and low-level signal lines are a pair of differential signal lines, together forming a CAN communication network with high anti-interference capability.

[0083] The CAN communication module includes a CAN transceiver chip U2. The data input pin TXD of the CAN transceiver chip U2 is connected to the CAN_TX pin of the controller MCU; the data output pin RX of the CAN transceiver chip U2 is connected to the CAN_RX pin of the controller MCU; the control pin STB of the CAN transceiver chip U2 is connected to the CAN_STB pin of the controller MCU; the control pin STB of the CAN transceiver chip U2 is connected to one end of a resistor R102, and the other end of the resistor R102 is grounded.

[0084] The VCC pin of the CAN transceiver chip U2 is connected to a 3.3V power supply and to the first end of capacitor C10. The second end of capacitor C10 is connected to the GND pin of the CAN transceiver chip U2 and grounded. The SPLIT pin of the CAN transceiver chip U2 is connected to ground after being connected to capacitor C15; The CAN communication module also includes a common-mode choke L3, resistors R103, R104, R101, capacitors C12 and C47, and a bidirectional TVS diode array U8. The first end of the common mode choke L3 is connected to the CANL pin of the CAN transceiver chip U2, the fourth end of the common mode choke L3 is connected to the CANH pin of the CAN transceiver chip U2, the first end of the resistor R103 is connected to the CANL pin of the CAN transceiver chip U2, the second end of the resistor R104 is connected to the CANH pin of the CAN transceiver chip U2, and the second ends of both the resistor R103 and the resistor R104 are grounded. The second end of the common-mode choke L3 is connected to the first end of capacitor C12, the first end of resistor R101, the second end of bidirectional TVS diode array U8, and the CAN_L pin of the power supply and communication module; the second end of capacitor C12 is grounded. The third terminal of the common-mode choke L3 is connected to the second terminal of resistor R101, the first terminal of capacitor C47, the first terminal of bidirectional TVS diode array U8, and the CAN_H pin of the power supply and communication module. The third terminal of bidirectional TVS diode array U8 is grounded.

[0085] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0086] For those skilled in the art, designing different forms of control circuits according to the teachings of this invention does not require creative effort. Changes, modifications, substitutions, and variations made to the embodiments without departing from the principles and spirit of this invention still fall within the scope of protection of this invention.

Claims

1. A battery pack CCS harness temperature sensing probe detection system, characterized in that, The system includes: Several ambient temperature detection circuits are used to collect ambient temperature data; Channel temperature acquisition harness module, used to connect to the CCS harness of the battery pack; The channel temperature detection module is connected to the channel temperature acquisition harness module and is used to acquire the temperature of the battery pack CCS harness. The LED indicator module illuminates based on the detection results. The controller MCU is connected to the ambient temperature detection circuit. It receives ambient temperatures collected by several ambient temperature detection circuits and takes the average of these ambient temperatures as the final ambient temperature. The controller MCU is also connected to the channel temperature detection module, which compares the temperature of the battery pack CCS harness with the final ambient temperature to obtain the difference. The controller MCU is also connected to the LED indicator module, which controls the LED indicator module to light up based on the difference.

2. The system as described in claim 1, characterized in that, The ambient temperature detection circuit includes: a power input VCC, a pull-up resistor R95, a resistor R96, a resistor R97, and a filter capacitor C45. The first end of the pull-up resistor R95 is connected to the power input VCC, and the second end is connected to the first end of the resistor R96 and the first end of the resistor R97. The second end of the resistor R97 is grounded. The second end of the resistor R96 is connected to the first end of the filter capacitor C45 and the voltage signal output terminal TEMP_2. The second end of the filter capacitor C45 is grounded. The voltage signal output terminal TEMP_2 is used to connect to the TEMP_2 pin of the controller MCU.

3. The system as described in claim 2, characterized in that, The channel temperature detection module includes a channel temperature detection chip U4, a signal output circuit, and a channel temperature input circuit. The power supply pin VCC of the channel temperature detection chip U4 is connected to a 3.3V power supply and is also grounded; the enable pin EN of the channel temperature detection chip U4 is connected to the START pin of the controller MCU through resistor R106; the address selection pin S0 of the channel temperature detection chip U4 is connected to the SA_0 pin of the controller MCU; the address selection pin S1 of the channel temperature detection chip U4 is connected to the SA_1 pin of the controller MCU; and the address selection pin S2 of the channel temperature detection chip U4 is connected to the SA_2 pin of the controller MCU. The channel temperature input circuit contains several diodes, each corresponding to several parallel channel temperature input branches. The first end of the diode is connected to the input channel pin of the channel temperature detection chip U4 and the channel temperature acquisition harness module, and the second end of the diode is grounded. The signal output circuit includes resistors R54 and R55, capacitors C36 and C37. The first end of resistor R54 is connected to a 3.3V power supply, and the second end of resistor R54 is connected to the first end of resistor R55, the first end of capacitor C37, and the Y pin of the channel temperature detection chip U4. The second end of resistor R55 is connected to the TEMP_A pin of the controller MCU, and the second end of capacitor C37 is grounded. The first end of capacitor C36 is connected to the VCC pin of the channel temperature detection chip U4 and the 3.3V power supply, and the second end of capacitor C36 is connected to the GND pin of the channel temperature detection chip U4 and grounded.

4. The system as described in claim 3, characterized in that, The channel temperature acquisition harness module includes connector J13. The RT1A pin of connector J13 is connected to the I0 pin of channel temperature detection chip U4; the RT2A pin of connector J13 is connected to the I1 pin of channel temperature detection chip U4; the RT3A pin of connector J13 is connected to the I2 pin of channel temperature detection chip U4; the RT4A pin of connector J13 is connected to the I3 pin of channel temperature detection chip U4; the RT5A pin of connector J13 is connected to the I4 pin of channel temperature detection chip U4; the RT6A pin of connector J13 is connected to the I5 pin of channel temperature detection chip U4; the RT7A pin of connector J13 is connected to the I6 pin of channel temperature detection chip U4; and the RT8A pin of connector J13 is connected to the I7 pin of channel temperature detection chip U4.

5. The system as described in claim 4, characterized in that, The LED indicator module includes: several sets of green indicator circuits and red indicator circuits; The green indicator circuit includes an input power supply VCC_3V3, a green indicator D9, resistors R15 and R16, and an NPN transistor Q6. The positive terminal of the green indicator D9 is connected to the input power supply VCC_3V3, the negative terminal of the green indicator D9 is connected to the first end of resistor R15, the second end of resistor R15 is connected to the collector of NPN transistor Q6, the emitter of NPN transistor Q6 is grounded, and the base of NPN transistor Q6 is connected to the external control signal receiver LED_4 through resistor R16. The external control signal receiver LED_4 is used to connect to the LED_4 pin of the controller MCU. The red indicator circuit includes the input power supply VCC_3V3, the red indicator D5, resistor R7, resistor R8, and NPN transistor Q2. The positive terminal of the red indicator D5 is connected to the input power supply VCC_3V3, and the negative terminal of the red indicator D5 is connected to the first end of resistor R7. The second end of resistor R7 is connected to the collector of NPN transistor Q2. The emitter of NPN transistor Q2 is grounded, and the base of NPN transistor Q2 is connected to the external control signal receiver LED_3 through resistor R8. The external control signal receiver LED_3 is used to connect to the LED_3 pin of the controller MCU.

6. The system as described in claim 5, characterized in that, The system also includes an LED interface circuit; The LED interface circuit includes an LED power supply circuit, a display interface J11, and a display interface J12; Display interface J11 and display interface J12 are two identical 8-pin interfaces; among them, display interface J11 includes VCC_LCD pin, GND pin, LCD_MOSI pin, LCD_SCK pin, LCD_CS pin, LCD_MISO pin, LCD_RS pin and LCD_BLK pin; The VCC_LCD pin is used to connect to the LED power supply circuit, drawing power from the LED power supply circuit to power the screen; the GND pin is used to connect to ground; the LCD_MOSI pin is the master output / slave input pin, connected to the PB15 pin of the controller MCU; the LCD_SCK pin is the clock pin, connected to the PB13 pin of the controller MCU; the LCD_CS pin is the chip select pin, connected to the PB12 pin of the controller MCU, used to select the LCD screen; the LCD_MISO pin is the master input / slave output pin, connected to the PB14 pin of the controller MCU; the LCD_RS pin is the register select pin, connected to the PC5 pin of the controller MCU; the LCD_BLK pin is the backlight control pin, connected to the PB1 pin of the controller MCU. The LED power supply circuit includes resistors R122 and R123 connected in parallel. The first end of resistor R122 is connected to power supply VCC_3V3 for inputting 3.3V voltage, and the first end of resistor R123 is connected to 5V voltage. When the second terminals of resistor R122 and resistor R123 are connected, the output power VCC_LED is generated. The VCC_LED pin of display interface J11 and the VCC_LED pin of display interface J12 are both connected to the power supply VCC_LED of the LED power supply circuit.

7. The system as described in claim 6, characterized in that, The system also includes a digital input interface protection circuit, which includes a signal receiving port ADD-DI, a pull-up resistor R105, a diode D61, a capacitor C48, and a signal output port MCU-ADD-DI. The power supply VCC_3V3 is connected to the signal receiving port ADD-DI through a pull-up resistor R105. The signal receiving port ADD-DI is used to receive external signals. The cathode of diode D61 is connected to the power supply VCC_3V3, and the anode of diode D61 is grounded. The first end of capacitor C48 is connected to the signal receiving port ADD-DI and the signal output port MCU-ADD-DI, and the second end of capacitor C48 is grounded. The signal output port MCU-ADD-DI is used to connect to the MCU-ADD-DI pin of the controller MCU.

8. The system as described in claim 7, characterized in that, The system also includes a power supply circuit, which includes a power input interface POWER+, a voltage regulator chip U9, a capacitor C49, and a capacitor C50; the first end of capacitor C49 is connected to the power input interface POWER+, and the second end of capacitor C49 is grounded. The input pin of the voltage regulator chip U9 is connected to the first terminal of capacitor C49, the ground pin of the voltage regulator chip U9 is grounded, and the output pin of the voltage regulator chip U9 outputs a stable +5V voltage. The first terminal of capacitor C50 is connected to the +5V output, and the second terminal of capacitor C50 is grounded.

9. The system as described in claim 8, characterized in that, The system also includes a power supply and communication module and a CAN communication module; The power supply and communication module includes connector J4. The power output pin of connector J4 is connected to the power input interface POWER+ of the power supply circuit; the digital input pin of connector J4 is connected to the signal receiving port ADD-DI of the digital input interface protection circuit; and both the high-level signal line pin and the low-level signal line pin of connector J4 are connected to the CAN communication module.

10. The system as described in claim 9, characterized in that, The CAN communication module includes a CAN transceiver chip U2. The data input pin TXD of the CAN transceiver chip U2 is connected to the CAN_TX pin of the controller MCU; the data output pin RX of the CAN transceiver chip U2 is connected to the CAN_RX pin of the controller MCU; and the control pin STB of the CAN transceiver chip U2 is connected to the CAN_STB pin of the controller MCU. The VCC pin of the CAN transceiver chip U2 is connected to a 3.3V power supply and to the first end of capacitor C10. The second end of capacitor C10 is connected to the GND pin of the CAN transceiver chip U2 and grounded. The SPLIT pin of the CAN transceiver chip U2 is connected to ground after being connected to capacitor C15; The CAN communication module also includes a common-mode choke L3, resistors R103, R104, R101, capacitors C12 and C47, and a bidirectional TVS diode array U8. The first end of the common mode choke L3 is connected to the CANL pin of the CAN transceiver chip U2, the fourth end of the common mode choke L3 is connected to the CANH pin of the CAN transceiver chip U2, the first end of the resistor R103 is connected to the CANL pin of the CAN transceiver chip U2, the second end of the resistor R104 is connected to the CANH pin of the CAN transceiver chip U2, and the second ends of both the resistor R103 and the resistor R104 are grounded. The second end of the common-mode choke L3 is connected to the first end of capacitor C12, the first end of resistor R101, the second end of bidirectional TVS diode array U8, and the CAN_L pin of the power supply and communication module; the second end of capacitor C12 is grounded. The third terminal of the common-mode choke L3 is connected to the second terminal of resistor R101, the first terminal of capacitor C47, the first terminal of bidirectional TVS diode array U8, and the CAN_H pin of the power supply and communication module. The third terminal of bidirectional TVS diode array U8 is grounded.

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