State monitoring circuit for ship battery system

Abstract

The utility model discloses a state monitoring circuit for a ship battery system, and belongs to the technical field of battery monitoring. Comprising a chip U1, a communication interface of the chip U1 is in communication connection with external equipment through a CAN communication sub-circuit, the input end of the chip U1 is connected with the output end of a temperature acquisition sub-circuit and the output end of a voltage and current acquisition sub-circuit, and the input end of the voltage and current acquisition sub-circuit is connected with a ship battery system. The voltage and current acquisition sub-circuit is used for acquiring real-time voltage and current in the ship battery system, the input end of the temperature acquisition sub-circuit is connected with the ship battery system, and the temperature acquisition sub-circuit is used for acquiring a voltage value of the ship battery system accessed into the temperature acquisition sub-circuit. According to the utility model, the temperature of each corresponding path in the ship battery system can be accurately detected, the voltage and current of the ship battery system can be monitored in cooperation with the voltage and current acquisition sub-circuit, the abnormal condition of over-charging or over-discharging of the battery can be found in time, the further deterioration of the fault is avoided, and the sailing safety of the ship is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of battery monitoring technology, specifically relating to a state monitoring circuit for a ship battery system. Background Technology

[0002] The battery management system plays a crucial role in the battery system, acting like the brain and nervous system of the power lithium-ion battery system, controlling the overall operation of the lithium-ion battery-powered ship. It can perform tasks such as monitoring, controlling, and digitally managing the battery pack, and can effectively improve the efficiency of the battery pack. It is an indispensable core component of the ship's control system.

[0003] However, the ambient temperature varies when ships sail in different sea areas and seasons. Different ambient temperatures directly affect the performance of the battery management system. Existing battery management systems usually use temperature sensors to monitor the temperature of the battery management system. However, in low-temperature environments, the accuracy of the temperature sensors is affected, resulting in inaccurate monitoring data, which directly affects the effectiveness of the ship's battery management system. Utility Model Content

[0004] Purpose of this utility model: To provide a status monitoring circuit for a ship battery system, which solves the above-mentioned problems existing in the prior art.

[0005] Technical Solution: A marine battery system status monitoring circuit includes a chip U1. The communication interface of the chip U1 is connected to an external device via a CAN communication sub-circuit. The input terminals of the chip U1 are respectively connected to the output terminals of a temperature acquisition sub-circuit and a voltage and current acquisition sub-circuit. The input terminal of the voltage and current acquisition sub-circuit is connected to the marine battery system and is used to acquire real-time voltage and current in the marine battery system. The input terminal of the temperature acquisition sub-circuit is connected to the marine battery system and is used to acquire the voltage value of the marine battery system connected to the temperature acquisition sub-circuit.

[0006] Preferably, the voltage and current acquisition sub-circuit includes chip U2, resistors R1, R2, R3, R4, R5, R6, R7, an adjustable resistor R8, connector U7, and connector H1. Pins 7 and 8 of chip U2 are connected to the ship's battery system. Pin 3 of chip U2 is connected to one end of resistor R6. The other end of resistor R6 is connected to both connector U7 and resistor R7. The other end of resistor R7 is connected to both resistor R1 and resistor R4. One end of resistor R2 is connected to resistor R1, and the other end is connected to both resistor R3 and pin 2 of chip U2. The other end of resistor R3 is connected to the adjustable resistor R8. The other end of the adjustable resistor R8 is connected to pin 1 of chip U2. The other end of resistor R4 is connected to both one end of resistor R5 and connector H1. The other end of resistor R5 is grounded. The PA1 pin of connector H1 is connected to pin 24 of chip U1.

[0007] Preferably, the temperature acquisition subcircuit includes resistors R9, R10, R11, R12, R13, R14, R15, and R16; capacitors C1, C2, C3, C4, C5, C6, C7, and C8; and diodes D1, D2, D3, and D4. One end of capacitor C1 is connected to capacitors C2, C3, and C4, and is connected to the voltage value of the resistor in the ship's battery system via TS1-. The other end of capacitor C1 is connected to resistors R9 and R10, and is connected to the voltage value of the resistor in the ship's battery system via TS1+. The other end of resistor R9 is connected to resistors R11, R13, and R15. The other end of resistor R10 is connected to pin 3 of diode D1. The capacitor C5 is connected to pin 26 of the chip U1. The other end of the capacitor C5 is grounded. Pin 1 of the diode D1 is grounded. Pin 2 of the diode D1 is connected to pin 2 of the diodes D2, D3, and D4. The other end of the capacitor C2 is connected to resistors R11 and R12. The other end of the resistor R12 is connected to pin 3 of the diode D2, capacitor C6, and pin 25 of the chip U1. The other end of the capacitor C3 is connected to resistors R13 and R14. The other end of the resistor R14 is connected to capacitor C7, pin 3 of the diode D3, and pin 24 of the chip U1. The other end of the capacitor C4 is connected to resistors R15 and R16. The other end of the resistor R16 is connected to capacitor C8, pin 3 of the diode D4, and pin 23 of the chip U1.

[0008] Preferably, the CAN communication sub-circuit includes capacitor C9, capacitor C10, resistors R17, R18, and R19, chip U1, inductor L1, and diode D5. Pin 1 of chip U1 is connected to pin 92 of chip U1. The anode of diode D5 is connected to pin 91 of chip U1, and the cathode of diode D5 is connected to pin 4 of chip U3. One end of capacitor C9 is connected to pin 2 of chip U3, and the other end is connected to pin 3 of chip U3. Pin 1 of inductor L1 is connected to... Pin 7 of chip U3 is connected to pin 6 of chip U3. Pin 3 of inductor L1 is connected to pin 3 of diode D6 and one end of resistor R18. Pin 4 of inductor L1 is connected to pin 3 of diode D6 and one end of resistor R17. One end of resistor R19 is connected to pin 8 of chip U3, and its other end is connected to pin 1 of diode D6 and one end of resistor C10. The other end of capacitor C10 is connected to resistor R17 and resistor R18.

[0009] Preferably, the chip U1 is an STM32F105VCT6 chip.

[0010] Preferably, the chip U2 is an LM358DRG3 chip.

[0011] Preferably, diodes D1, D2, D3 and D4 are all MMBD7000LT1G type diodes.

[0012] Beneficial effects: This utility model relates to a state monitoring circuit for a ship battery system. It collects the voltage values ​​of multiple resistors in the ship battery system through a temperature acquisition subcircuit, calculates the resistance value of the corresponding temperature-sensing resistor based on the voltage values ​​of the connected resistors, and obtains the temperature corresponding to that temperature-sensing resistor by looking up a table. This allows for accurate detection of the corresponding temperatures in each circuit of the ship battery system. Combined with a voltage and current acquisition subcircuit to monitor the voltage and current of the ship battery system, it can promptly detect abnormal conditions such as overcharging or over-discharging of the battery, preventing further deterioration of the fault and ensuring the safety of ship navigation. Attached Figure Description

[0013] Figure 1 This is the overall circuit diagram of this utility model. Detailed Implementation

[0014] like Figure 1As shown, this utility model provides a technical solution: a marine battery system status monitoring circuit, including a chip U1. The chip U1 uses an STM32F105VCT6 chip. The communication interface of the chip U1 is connected to an external device via a CAN communication sub-circuit. The input terminals of the chip U1 are respectively connected to the output terminals of a temperature acquisition sub-circuit and a voltage and current acquisition sub-circuit. The input terminal of the voltage and current acquisition sub-circuit is connected to the marine battery system and is used to acquire real-time voltage and current in the marine battery system. The input terminal of the temperature acquisition sub-circuit is also connected to the marine battery system and is used to acquire the voltage value of the marine battery system connected to the temperature acquisition sub-circuit. The temperature acquisition sub-circuit includes resistors R9, R10, R11, R12, R13, R14, R15, and R16; capacitors C1, C2, C3, C4, C5, C6, C7, and C8; and diodes D1, D2, D3, and D4. Diodes D1, D2, D3, and D4 are all MMBD7000LT1G type diodes. One end of capacitor C1 is connected to capacitors C2, C3, and C4, and simultaneously connected to the voltage value of the resistor in the ship's battery system via TS1. The other end of capacitor C1 is connected to resistors R9 and R16. 10. Simultaneously, the voltage value of the resistor connected to the ship's battery system via TS1+ is simultaneously measured. The other end of resistor R9de is connected to resistors R11, R13, and R15. The other end of resistor R10 is connected to pin 3 of diode D1, capacitor C5, and pin 26 of chip U1. The other end of capacitor C5 is grounded. Pin 1 of diode D1 is grounded. Pin 2 of diode D1 is connected to pin 2 of diodes D2, D3, and D4. The other end of capacitor C2 is connected to resistors R11 and R12. The other end of resistor R12 is connected to pin 3 of diode D2, capacitor C6, and pin 25 of chip U1. The other end of capacitor C3... The temperature acquisition subcircuit connects resistors R13 and R14 simultaneously. The other end of resistor R14 is connected to capacitor C7, pin 3 of diode D3, and pin 24 of chip U1. The other end of capacitor C4 is connected to resistors R15 and R16 simultaneously. The other end of resistor R16 is connected to capacitor C8, pin 3 of diode D4, and pin 23 of chip U1. This temperature acquisition subcircuit establishes four temperature acquisition channels, enabling multi-channel monitoring of the ship's battery system. This allows for accurate detection of the corresponding temperatures within the ship's battery system. Combined with the voltage and current acquisition subcircuit to monitor the voltage and current of the ship's battery system, it can promptly detect abnormal conditions such as overcharging or over-discharging, preventing further deterioration of the fault and ensuring the ship's navigation safety.

[0015] In a further embodiment, such as Figure 1 As shown, the voltage and current acquisition sub-circuit includes chip U2, resistors R1, R2, R3, R4, R5, R6, R7, adjusting resistor R8, connector U7, and connector H1. Chip U2 is an LM358DRG3 chip. Pins 7 and 8 of chip U2 are connected to the ship's battery system. Pin 3 of chip U2 is connected to one end of resistor R6. The other end of resistor R6 is connected to both connector U7 and resistor R7. The other end of resistor R7 is connected to both resistor R1 and resistor R4. One end of resistor R2 is connected to resistor R1. Its other end is connected to resistor R3 and pin 2 of chip U2. The other end of resistor R3 is connected to adjustable resistor R8. The other end of adjustable resistor R8 is connected to pin 1 of chip U2. The other end of resistor R4 is connected to one end of resistor R5 and connector H1. The other end of resistor R5 is grounded. The PA1 pin of connector H1 is connected to pin 24 of chip U1. The input voltage is amplified by chip U2 and fine-tuned by adjusting resistor R8. The voltage and current are calculated in real time to detect abnormal conditions such as overcharging or over-discharging of the battery in a timely manner, so as to avoid further deterioration of the fault and ensure the navigation safety of the ship.

[0016] In a further embodiment, the CAN communication sub-circuit includes capacitor C9, capacitor C10, resistors R17, R18, and R19, chip U1, inductor L1, and diode D5. Pin 1 of chip U1 is connected to pin 92 of chip U1. The anode of diode D5 is connected to pin 91 of chip U1, and the cathode of diode D5 is connected to pin 4 of chip U3. One end of capacitor C9 is connected to pin 2 of chip U3, and the other end is connected to pin 3 of chip U3. Pin 1 of inductor L1 is connected to pin 7 of chip U3. Pin 2 of inductor L1 is connected to pin 6 of chip U3. Pin 3 of inductor L1 is simultaneously connected to pin 3 of diode D6 and one end of resistor R18. Pin 4 of inductor L1 is simultaneously connected to... Pin 3 of diode D6 and one end of resistor R17 are connected. One end of resistor R19 is connected to pin 8 of chip U3, and its other end is connected to pin 1 of diode D6 and one end of resistor C10. The other end of capacitor C10 is connected to resistors R17 and R18. Capacitor C9 is connected between pins 2 and 3 of chip U3 as a filter capacitor. When the load changes or the power supply is unstable, capacitor C9 absorbs the fluctuations to ensure the normal operation of chip U3. It also works with diode D5 to provide voltage regulation and protection for chip U3, preventing chip U3 from being damaged by breakdown. Inductor L1 filters common-mode electromagnetic interference signals, and diode D6 shunts excessively high voltages to limit the voltage across chip U3 within a safe range, ensuring the stability of the entire CAN communication sub-circuit.

[0017] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A state monitoring circuit for a marine battery system, characterized in that, The system includes a chip U1, whose communication interface is connected to external devices via a CAN communication sub-circuit. The input terminals of the chip U1 are connected to the output terminals of a temperature acquisition sub-circuit and a voltage and current acquisition sub-circuit, respectively. The input terminal of the voltage and current acquisition sub-circuit is connected to the ship's battery system and is used to acquire real-time voltage and current data from the ship's battery system. The input terminal of the temperature acquisition sub-circuit is also connected to the ship's battery system and is used to acquire the voltage value of the ship's battery system connected to the temperature acquisition sub-circuit.

2. The ship battery system status monitoring circuit according to claim 1, characterized in that, The voltage and current acquisition sub-circuit includes chip U2, resistors R1, R2, R3, R4, R5, R6, R7, an adjustable resistor R8, connector U7, and connector H1. Pins 7 and 8 of chip U2 are connected to the ship's battery system. Pin 3 of chip U2 is connected to one end of resistor R6. The other end of resistor R6 is connected to both connector U7 and resistor R7. The other end of resistor R7 is connected to both resistor R1 and resistor R4. One end of resistor R2 is connected to resistor R1, and the other end is connected to both resistor R3 and pin 2 of chip U2. The other end of resistor R3 is connected to the adjustable resistor R8. The other end of the adjustable resistor R8 is connected to pin 1 of chip U2. The other end of resistor R4 is connected to both one end of resistor R5 and connector H1. The other end of resistor R5 is grounded. The PA1 pin of connector H1 is connected to pin 24 of chip U1.

3. The ship battery system status monitoring circuit according to claim 1, characterized in that, The temperature acquisition subcircuit includes resistors R9, R10, R11, R12, R13, R14, R15, and R16; capacitors C1, C2, C3, C4, C5, C6, C7, and C8; and diodes D1, D2, D3, and D4. One end of capacitor C1 is connected to capacitors C2, C3, and C4, and simultaneously receives the voltage value of the resistor in the ship's battery system via TS1-. The other end of capacitor C1 is connected to resistors R9 and R10, and simultaneously receives the voltage value of the resistor in the ship's battery system via TS1+. The other end of resistor R9 is connected to resistors R11, R13, and R15. The other end of resistor R10 is connected to pin 3 of diode D1 and capacitor D4. C5 and pin 26 of chip U1 are connected. The other end of capacitor C5 is grounded. Pin 1 of diode D1 is grounded. Pin 2 of diode D1 is connected to pin 2 of diode D2, pin 2 of diode D3, and pin 2 of diode D4. The other end of capacitor C2 is connected to resistors R11 and R12. The other end of resistor R12 is connected to pin 3 of diode D2, capacitor C6, and pin 25 of chip U1. The other end of capacitor C3 is connected to resistors R13 and R14. The other end of resistor R14 is connected to capacitor C7, pin 3 of diode D3, and pin 24 of chip U1. The other end of capacitor C4 is connected to resistors R15 and R16. The other end of resistor R16 is connected to capacitor C8, pin 3 of diode D4, and pin 23 of chip U1.

4. The ship battery system status monitoring circuit according to claim 1, characterized in that, The CAN communication sub-circuit includes capacitors C9 and C10, resistors R17, R18, and R19, chip U1, inductor L1, and diode D5. Pin 1 of chip U1 is connected to pin 92 of chip U1. The anode of diode D5 is connected to pin 91 of chip U1, and the cathode of diode D5 is connected to pin 4 of chip U3. One end of capacitor C9 is connected to pin 2 of chip U3, and the other end is connected to pin 3 of chip U3. Pin 1 of inductor L1 is connected to chip U1. Pin 7 of U3, pin 2 of inductor L1 is connected to pin 6 of chip U3, pin 3 of inductor L1 is connected to pin 3 of diode D6 and one end of resistor R18, pin 4 of inductor L1 is connected to pin 3 of diode D6 and one end of resistor R17, one end of resistor R19 is connected to pin 8 of chip U3, and its other end is connected to pin 1 of diode D6 and one end of resistor C10. The other end of capacitor C10 is connected to resistor R17 and resistor R18.

5. The ship battery system status monitoring circuit according to claim 1, characterized in that, The chip U1 is an STM32F105VCT6 chip.

6. A ship battery system status monitoring circuit according to claim 2, characterized in that, The chip U2 is an LM358DRG3 model chip.

7. A ship battery system status monitoring circuit according to claim 3, characterized in that, Diodes D1, D2, D3, and D4 are all MMBD7000LT1G type diodes.

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