Battery monitoring system of new energy automobile

Abstract

The utility model relates to a battery monitoring system of a new energy automobile, which comprises a voltage monitoring module for monitoring the output voltage of a storage battery of the new energy automobile and a current monitoring module for monitoring the output current of the storage battery of the new energy automobile, the voltage monitoring module and the current monitoring module are both electrically connected with a storage battery of the new energy automobile, the voltage adjusting circuit is electrically connected with the voltage monitoring module, and the MCU control module is connected with the voltage monitoring module, the current monitoring module and the voltage adjusting circuit. In the running process of the new energy automobile, the storage battery provides running power for the automobile, the output voltage of the storage battery is monitored through the voltage monitoring module, the output current of the storage battery is monitored through the current monitoring module, and whether the voltage and current data are abnormal or not is judged through the MCU control module. Therefore, the abnormity can be handled in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery monitoring of new energy vehicles, and in particular relates to a battery monitoring system for new energy vehicles. Background Art

[0002] New energy vehicles are vehicles that use unconventional vehicle fuels as a power source (or use conventional vehicle fuels and new vehicle power devices), integrate advanced technologies in vehicle power control and driving, and form vehicles with advanced technical principles, new technologies, and new structures. For example, a pure electric vehicle (BEV) is a vehicle that uses a single battery as a power source for energy storage. It uses a battery as a power source for energy storage, provides electrical energy to the motor through the battery, drives the motor to run, and thus drives the vehicle to travel. The rechargeable batteries of pure electric vehicles mainly include lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries, which can provide power for pure electric vehicles. At the same time, pure electric vehicles also use batteries to store electrical energy to drive the motor to run normally. Since it does not produce gases that pollute the atmospheric environment in the process of providing power to the vehicle, and can be powered by receiving clean energy such as solar energy conversion devices, new energy vehicles are developing rapidly and are becoming more and more widely used.

[0003] However, since electric vehicles are equipped with batteries, there are also great safety hazards in the process of using batteries to power the vehicle. For example, overvoltage and overcurrent of new energy vehicle batteries can cause battery overheating, aging or damage, or even cause battery spontaneous combustion, resulting in serious safety accidents.

[0004] Therefore, how to monitor the voltage, current and other information of the battery of new energy vehicles to ensure real-time understanding of the battery status and take timely measures to deal with abnormalities in the battery is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a battery monitoring system for new energy vehicles, which is used to monitor the voltage and current of the battery of the new energy vehicle to ensure real-time understanding of the battery status and to take timely measures to deal with abnormalities in the battery.

[0006] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] A battery monitoring system for a new energy vehicle comprises a voltage monitoring module for monitoring the output voltage of a storage battery of the new energy vehicle and a current monitoring module for monitoring the output current of the storage battery of the new energy vehicle, wherein the voltage monitoring module and the current monitoring module are both electrically connected to the storage battery of the new energy vehicle, and further comprises a voltage regulating circuit, wherein the voltage regulating circuit is electrically connected to the voltage monitoring module, and further comprises an MCU control module, wherein the MCU control module is respectively connected to the voltage monitoring module, the current monitoring module and the voltage regulating circuit.

[0008] Preferably, the voltage monitoring module includes a voltage monitoring circuit, and the voltage monitoring circuit includes a voltage input terminal, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first transistor, a second transistor and a voltage output terminal;

[0009] One end of the first resistor is respectively connected to the voltage input end and the emitter of the first transistor, and the other end is respectively connected to the collector of the second resistor and the second diode, the base of the first transistor is connected to the second resistor, the collector of the first transistor is connected to one end of the third resistor, and the other end of the third resistor is grounded through the fourth resistor; the collector of the second transistor is respectively connected to the first resistor and the second resistor, the emitter of the second transistor is grounded, and the base of the second transistor is connected to the fifth resistor.

[0010] Preferably, the first transistor is a PNP transistor, and the second transistor is an NPN transistor.

[0011] Preferably, the current monitoring module includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor and an amplifier;

[0012] The voltage output terminal is connected to the sixth resistor and the seventh resistor respectively, the sixth resistor is grounded through the ninth resistor, and the ninth resistor is connected in parallel with the tenth resistor and then grounded;

[0013] The other end of the seventh resistor is connected to the eighth resistor and the thirteenth resistor respectively, the other end of the eighth resistor is connected to the twelfth resistor and the inverting input terminal of the amplifier respectively, and the eighth resistor is grounded through the eleventh resistor, the non-phase input terminal of the amplifier is connected to the sixth resistor, the ninth resistor and the tenth resistor respectively, and the output terminal of the amplifier is grounded.

[0014] Preferably, the amplifier is an operational amplifier, and the model of the operational amplifier is ADA4850-1‌.

[0015] Preferably, the voltage regulating circuit includes a transformer, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a first thyristor, a second thyristor and a capacitor;

[0016] The input end of the transformer is connected to the voltage output end of the voltage monitoring module, and the two ports of the output end of the transformer are respectively connected to a first diode and a second diode, the first diode and the second diode are connected in parallel, and are connected to the positive electrode of the third diode after being connected in parallel, the third diode is connected in series with a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a seventeenth resistor and then grounded, and the anode of the first thyristor is respectively connected to the positive electrode of the third diode and the negative electrode of the first diode;

[0017] The cathode of the first thyristor is grounded, the gate of the first thyristor is connected to the cathode of the fourth diode, the anode of the fourth diode is respectively connected to the eighteenth resistor and the nineteenth resistor, the nineteenth resistor is connected to the anode of the second thyristor, the cathode of the second thyristor is grounded, the gate of the second thyristor is connected to the anode of the fifth diode and the twentieth resistor, and the cathode of the fifth diode is respectively connected to the seventeenth resistor and the capacitor.

[0018] Preferably, the fifteenth resistor is a sliding rheostat, and the capacitor is a ceramic capacitor.

[0019] Preferably, the model of the MCU control module is GD32F303RCT6‌.

[0020] The utility model provides a battery monitoring system for a new energy vehicle, comprising a voltage monitoring module for monitoring the output voltage of the battery of the new energy vehicle and a current monitoring module for monitoring the output current of the battery of the new energy vehicle, wherein the voltage monitoring module and the current monitoring module are both electrically connected to the battery of the new energy vehicle, and further comprising a voltage regulating circuit and an MCU control module, wherein the voltage regulating circuit is electrically connected to the voltage monitoring module, and the MCU control module is respectively connected to the voltage monitoring module, the current monitoring module and the voltage regulating circuit. During the driving process of the new energy vehicle, the battery supplies power to the vehicle for driving, the output voltage of the battery is monitored by the voltage monitoring module, the output current of the battery is monitored by the current monitoring module, and the voltage and current data are judged by the MCU control module to determine whether there is an abnormality, so as to handle the abnormality in time, effectively avoiding the overheating, aging or damage of the battery due to the excessively high output voltage or overcurrent of the output current of the battery during the driving process of the new energy vehicle, and even causing the battery to spontaneously combust, causing serious safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the circuit structure of the voltage monitoring module of the utility model.

[0022] Figure 2 This is a schematic diagram of the circuit structure of the current monitoring module of the utility model.

[0023] Figure 3 This is a schematic diagram of the circuit structure of the voltage regulation module of the utility model.

[0024] Figure symbols: R1 is the first resistor; R2 is the second resistor; R3 is the third resistor; R4 is the fourth resistor; R5 is the fifth resistor; R6 is the sixth resistor; R7 is the seventh resistor; R8 is the eighth resistor; R9 is the ninth resistor; R10 is the tenth resistor; R11 is the eleventh resistor; R12 is the twelfth resistor; R13 is the thirteenth resistor; R14 is the fourteenth resistor; R15 is the fifteenth resistor; R16 is the sixteenth resistor; R17 is the seventeenth resistor; R18 is the eighteenth resistor; R19 is the nineteenth resistor; R20 is the twentieth resistor; Q1 is the first transistor; Q2 is the second transistor; D1 is the first diode; D2 is the second diode; D3 is the third diode; D4 is the fourth diode; D5 is the fifth diode; C is a capacitor; T is a transformer; SCR1 is the first thyristor; SCR2 is the second thyristor. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-Figure 3 The utility model is further described in detail:

[0026] Example 1

[0027] See attached Figure 1-Figure 3 As shown, a battery monitoring system for a new energy vehicle includes a voltage monitoring module for monitoring the output voltage of the battery of the new energy vehicle and a current monitoring module for monitoring the output current of the battery of the new energy vehicle, wherein the voltage monitoring module and the current monitoring module are both electrically connected to the battery of the new energy vehicle, and further include a voltage regulating circuit, wherein the voltage regulating circuit is electrically connected to the voltage monitoring module, and further include an MCU control module, wherein the MCU control module is respectively connected to the voltage monitoring module, the current monitoring module and the voltage regulating circuit.

[0028] During the driving process of the new energy vehicle, the battery provides power for the vehicle to drive. The output voltage of the battery is monitored by the voltage monitoring module, and the output current of the battery is monitored by the current monitoring module. The voltage monitoring module transmits the monitored voltage data and the current data monitored by the current monitoring module to the MCU control module. The MCU control module analyzes the real-time voltage data and the real-time current data, calculates whether the real-time voltage exceeds the preset voltage threshold, and determines whether the real-time current exceeds the preset current threshold, and then determines whether there are current and voltage anomalies in the process of the battery powering the vehicle.

[0029] When there is an abnormal voltage overvoltage or an abnormal current overcurrent, on the one hand, the MCU control module displays the information of overvoltage or overcurrent through the visual interface of the car to inform the driver or other people in the car of the abnormal information of overvoltage or overcurrent of the battery. So that the driver or other people in the car can react in time after learning the above abnormal information. On the other hand, the MCU control module can send a control command to the voltage regulation module to timely adjust the real-time output voltage of the battery through the voltage regulation module, thereby ensuring the safety of the battery. Therefore, the MCU control module determines whether there is an abnormality in the voltage and current data, so as to deal with the abnormality in time, effectively avoiding the overheating, aging or damage of the battery due to the excessive output voltage or overcurrent of the output current of the battery during the driving of the new energy vehicle, and even causing the battery to spontaneously combust, causing serious safety accidents.

[0030] Example 2

[0031] On the basis of Example 1, the voltage monitoring module includes a voltage monitoring circuit, which includes a voltage input terminal, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first transistor Q1, a second transistor Q2 and a voltage output terminal. One end of the first resistor R1 is connected to the voltage input terminal and the emitter of the first transistor Q1 respectively, and the other end is connected to the collector of the second resistor R2 and the second diode D2 respectively, the base of the first transistor Q1 is connected to the second resistor R2, the collector of the first transistor Q1 is connected to one end of the third resistor R3, and the other end of the third resistor R3 is grounded through the fourth resistor R4; the collector of the second transistor Q2 is connected to the first resistor R1 and the second resistor R2 respectively, the emitter of the second transistor Q2 is grounded, and the base of the second transistor Q2 is connected to the fifth resistor R5. The first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor.

[0032] The voltage monitoring module is a switch-controlled power supply voltage detection circuit. The IO port of the MCU control module outputs a high level or a low level, and controls the passage of the power supply voltage detection circuit through the first transistor Q1 and the second transistor Q2. Only when the voltage needs to be detected, a high level is output to enable the first transistor Q1 and the second transistor Q2 to be turned on, and the battery voltage is divided by the third resistor R3 and the fourth resistor R4 for voltage value detection.

[0033] In this embodiment, the current monitoring module includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13 and an amplifier. The voltage output terminal is connected to the sixth resistor R6 and the seventh resistor R7 respectively, the sixth resistor R6 is grounded through the ninth resistor R9, the ninth resistor R9 is connected in parallel with the tenth resistor R10, and then connected in parallel to the ground. The other end of the seventh resistor R7 is connected to the eighth resistor R8 and the thirteenth resistor R13 respectively, the other end of the eighth resistor R8 is connected to the twelfth resistor R12 and the inverting input terminal of the amplifier respectively, and the eighth resistor R8 is grounded through the eleventh resistor R11, the positive input terminal of the amplifier is connected to the sixth resistor R6, the ninth resistor R9 and the tenth resistor R10 respectively, and the output terminal of the amplifier is grounded. The amplifier is an operational amplifier, and the model of the operational amplifier is ADA4850-1‌.

[0034] Example 3

[0035] On the basis of Example 1 or Example 2, the voltage regulating circuit includes a transformer T, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a first thyristor SCR1, a second thyristor SCR2 and a capacitor C. The input end of the transformer T is connected to the voltage output end of the voltage monitoring module, and the two ports of the output end of the transformer T are respectively connected to the first diode D1 and the second diode D2, the first diode D1 and the second diode D2 are connected in parallel, and are connected to the positive electrode of the third diode D3 after being connected in parallel, the third diode D3 is connected in series with the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16 and the seventeenth resistor R17 and are grounded, and the anode of the first thyristor SCR1 is respectively connected to the positive electrode of the third diode D3 and the negative electrode of the first diode D1.

[0036] The cathode of the first thyristor SCR1 is grounded, the gate of the first thyristor SCR1 is connected to the cathode of the fourth diode D4, the anode of the fourth diode D4 is respectively connected to the eighteenth resistor R18 and the nineteenth resistor R19, the nineteenth resistor R19 is connected to the anode of the second thyristor SCR2, the cathode of the second thyristor SCR2 is grounded, the gate of the second thyristor SCR2 is connected to the anode of the fifth diode D5 and the twentieth resistor R20, and the cathode of the fifth diode D5 is respectively connected to the seventeenth resistor R17 and the capacitor C.

[0037] The voltage regulating circuit is provided with a thyristor, which is a four-layer three-terminal semiconductor, connected between the power supply and the load, and equipped with a corresponding trigger control circuit board, so as to adjust the voltage, current or power in the circuit.

[0038] In this embodiment, the fifteenth resistor R15 is a sliding rheostat, and the capacitor C is a ceramic capacitor. The model of the MCU control module is GD32F303RCT6‌.

[0039] In summary, it includes a voltage monitoring module for monitoring the output voltage of the battery of the new energy vehicle and a current monitoring module for monitoring the output current of the battery of the new energy vehicle. Both the voltage monitoring module and the current monitoring module are electrically connected to the battery of the new energy vehicle. It also includes a voltage regulating circuit and an MCU control module. The voltage regulating circuit is electrically connected to the voltage monitoring module. The MCU control module is connected to the voltage monitoring module, the current monitoring module and the voltage regulating circuit respectively. During the driving process of the new energy vehicle, the battery provides power for the vehicle to drive. The output voltage of the battery is monitored by the voltage monitoring module, the output current of the battery is monitored by the current monitoring module, and the voltage and current data are judged by the MCU control module to determine whether there is an abnormality, so as to deal with the abnormality in time.

Claims

1. A battery monitoring system for new energy vehicles, characterized in that: It includes a voltage monitoring module for monitoring the output voltage of the battery of the new energy vehicle and a current monitoring module for monitoring the output current of the battery of the new energy vehicle. The voltage monitoring module and the current monitoring module are both electrically connected to the battery of the new energy vehicle. It also includes a voltage regulating circuit, which is electrically connected to the voltage monitoring module. It also includes an MCU control module, which is respectively connected to the voltage monitoring module, the current monitoring module and the voltage regulating circuit.

2. A battery monitoring system for a new energy vehicle according to claim 1, characterized in that: The voltage monitoring module comprises a voltage monitoring circuit, which comprises a voltage input terminal, a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a first transistor (Q1), a second transistor (Q2) and a voltage output terminal; One end of the first resistor (R1) is respectively connected to the voltage input end and the emitter of the first triode (Q1), and the other end is respectively connected to the second resistor (R2) and the collector of the second diode (D2); the base of the first triode (Q1) is connected to the second resistor (R2), the collector of the first triode (Q1) is connected to one end of the third resistor (R3), and the other end of the third resistor (R3) is grounded through the fourth resistor (R4); the collector of the second triode (Q2) is respectively connected to the first resistor (R1) and the second resistor (R2), the emitter of the second triode (Q2) is grounded, and the base of the second triode (Q2) is connected to the fifth resistor (R5).

3. A battery monitoring system for new energy vehicles according to claim 2, characterized in that: The first transistor (Q1) is a PNP transistor, and the second transistor (Q2) is an NPN transistor.

4. A battery monitoring system for a new energy vehicle according to claim 2, characterized in that: The current monitoring module includes a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8), a ninth resistor (R9), a tenth resistor (R10), an eleventh resistor (R11), a twelfth resistor (R12), a thirteenth resistor (R13) and an amplifier; The voltage output end is connected to the sixth resistor (R6) and the seventh resistor (R7) respectively, the sixth resistor (R6) is grounded through a ninth resistor (R9), and the ninth resistor (R9) is connected in parallel with the tenth resistor (R10) and then grounded; The other end of the seventh resistor (R7) is connected to the eighth resistor (R8) and the thirteenth resistor (R13) respectively, the other end of the eighth resistor (R8) is connected to the twelfth resistor (R12) and the inverting input end of the amplifier respectively, and the eighth resistor (R8) is grounded through the eleventh resistor (R11), the non-inverting input end of the amplifier is connected to the sixth resistor (R6), the ninth resistor (R9) and the tenth resistor (R10) respectively, and the output end of the amplifier is grounded.

5. A battery monitoring system for a new energy vehicle according to claim 4, characterized in that: The amplifier is an operational amplifier, and the model of the operational amplifier is ADA4850-1‌.

6. A battery monitoring system for a new energy vehicle according to claim 1, characterized in that: The voltage regulating circuit includes a transformer (T), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a fourteenth resistor (R14), a fifteenth resistor (R15), a sixteenth resistor (R16), a seventeenth resistor (R17), an eighteenth resistor (R18), a nineteenth resistor (R19), a twentieth resistor (R20), a first thyristor (SCR1), a second thyristor (SCR2) and a capacitor (C); The input end of the transformer (T) is connected to the voltage output end of the voltage monitoring module, and the two ports of the output end of the transformer (T) are respectively connected to a first diode (D1) and a second diode (D2), the first diode (D1) and the second diode (D2) are connected in parallel, and are connected to the positive electrode of the third diode (D3) after being connected in parallel, the third diode (D3) is connected in series with a fourteenth resistor (R14), a fifteenth resistor (R15), a sixteenth resistor (R16) and a seventeenth resistor (R17) and are grounded, and the anode of the first thyristor (SCR1) is respectively connected to the positive electrode of the third diode (D3) and the negative electrode of the first diode (D1); The cathode of the first thyristor (SCR1) is grounded, the gate of the first thyristor (SCR1) is connected to the cathode of the fourth diode (D4), the anode of the fourth diode (D4) is respectively connected to the eighteenth resistor (R18) and the nineteenth resistor (R19), the nineteenth resistor (R19) is connected to the anode of the second thyristor (SCR2), the cathode of the second thyristor (SCR2) is grounded, the gate of the second thyristor (SCR2) is connected to the anode of the fifth diode (D5) and the twentieth resistor (R20), and the cathode of the fifth diode (D5) is respectively connected to the seventeenth resistor (R17) and the capacitor (C).

7. A battery monitoring system for a new energy vehicle according to claim 6, characterized in that: The fifteenth resistor (R15) is a sliding rheostat, and the capacitor (C) is a ceramic capacitor.

8. A battery monitoring system for a new energy vehicle according to claim 1, characterized in that: The model of the MCU control module is GD32F303RCT6.

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