Battery management system, battery device and electric device

Abstract

The utility model discloses a battery management system, a battery device and a power utilization device. The battery management system comprises an isolation assembly, the isolation assembly comprises a driving device and a controlled device, a first end of the driving device is electrically connected with a first power supply end through a high-voltage interlocking plug connector, a second end of the driving device is electrically connected with a first grounding end, and a first end of the controlled device is electrically connected with a second grounding end. The second end of the controlled device is used for outputting a detection signal; the driving device and the controlled device are configured as follows: under the condition that the high-voltage interlocking plug connector is well plugged, the driving device is connected with the first power supply end, so that the second end of the controlled device outputs a first signal; and under the condition that the high-voltage interlocking plug connector is poorly plugged, the driving device is disconnected with the first power supply end, so that the second end of the controlled device outputs a second signal. According to the embodiment of the invention, the anti-interference capability of the battery management system can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery management, in particular to a battery management system, a battery device and a power utilization device. BACKGROUND

[0002] The power system of an electric vehicle generally contains multiple high-voltage electrical devices, such as a high-voltage controller, a vehicle-mounted charging controller, etc. In order to avoid electric shock injury caused by accidental contact with high-voltage devices by human hands, the electric vehicle needs to detect the exposure state of each high-voltage device in the working state to prevent accidental contact with the human body, and this needs to be applied to a high-voltage interlock circuit.

[0003] The high-voltage interlock circuit mainly checks the integrity and continuity of the entire high-voltage system loop through a low-voltage signal, identifies abnormal disconnection of the loop, and timely disconnects the control electrical device of the high-voltage input end to protect user safety.

[0004] Because the interlocking terminal of the high-voltage interlock circuit may generate a certain surge and noise during plugging with the low-voltage loop, it has an impact on the subsequent detection circuit. UTILITY MODEL CONTENT

[0005] The present application provides a battery management system, a battery device and a power utilization device, which can improve the anti-interference ability of the battery management system.

[0006] In a first aspect, the present application provides a battery management system including an isolation component, the isolation component including a driving device and a controlled device, a first end of the driving device being electrically connected with a first power supply end through a high-voltage interlock plug, a second end of the driving device being electrically connected with a first ground end, a first end of the controlled device being electrically connected with a second ground end, and a second end of the controlled device being used for outputting a detection signal; the driving device and the controlled device are configured to: in the case that the high-voltage interlock plug is plugged well, the driving device is connected with the first power supply end, so that the second end of the controlled device outputs a first signal; and in the case that the high-voltage interlock plug is plugged poorly, the driving device is disconnected with the first power supply end, so that the second end of the controlled device outputs a second signal.

[0007] According to the battery management system provided by the embodiments of the present application, the isolation component includes the driving device and the controlled device, the second end of the controlled device can output different signals in the case that the high-voltage interlock plug is plugged well or poorly, so that the detection of whether the high-voltage interlock plug is plugged well or poorly can be realized according to the signal output by the second end of the controlled device; in addition, the power supply and the ground end between the driving device and the controlled device are isolated, which can reduce the impact of the surge and noise generated by the high-voltage interlock plug during plugging on the subsequent detection, and improve the anti-interference ability.

[0008] In a possible implementation of the first aspect, the battery management system further includes a comparator, a first input terminal of the comparator is electrically connected to the second terminal of the controlled device, and a second input terminal of the comparator is connected to a reference signal; the comparator is configured to output a high level or a low level based on a comparison result of a signal inputted through the first input terminal and the reference signal inputted through the second input terminal, and one of the high level and the low level is used to represent that the high-voltage interlocking connector is well plugged, and the other is used to represent that the high-voltage interlocking connector is poorly plugged.

[0009] The signal outputted by the second terminal of the controlled device can have certain fluctuations. In the embodiment of the application, a comparator is further added, which is connected between the second terminal of the controlled device and the GPIO port of the MCU, which is equivalent to adding an isolation between the second terminal of the controlled device and the GPIO port of the MCU, so as to further enhance the anti-interference capability. In addition, compared with the scheme of using an analog-to-digital converter (ADC) to detect whether the high-voltage interlocking connector is well plugged, the comparator has a lower cost.

[0010] In a possible implementation of the first aspect, the second terminal of the controlled device is further electrically connected to the second power terminal through a first resistor; and the driving device and the controlled device are configured to: in the case that the high-voltage interlocking connector is well plugged, the driving device is connected to the first power terminal, and the controlled device is turned on; and in the case that the high-voltage interlocking connector is poorly plugged, the driving device is disconnected from the first power terminal, and the controlled device is turned off.

[0011] In the embodiment, the second terminal of the controlled device is further electrically connected to the second power terminal, and in the case that the high-voltage interlocking connector is well plugged or poorly plugged, the driving device controls the controlled device to be in the turned-on state or the turned-off state respectively, so that the second terminal of the controlled device outputs different signals, thereby realizing detection of the plugging state of the high-voltage interlocking connector.

[0012] In a possible implementation of the first aspect, the driving device includes an infrared light-emitting diode, and the controlled device includes an infrared receiving diode; a positive electrode of the infrared light-emitting diode is the first terminal of the driving device, and a negative electrode of the infrared light-emitting diode is the second terminal of the driving device; a positive electrode of the infrared receiving diode is the first terminal of the controlled device, and a negative electrode of the infrared receiving diode is the second terminal of the controlled device.

[0013] In the embodiment, the driving device is an infrared light-emitting diode, and the controlled device is an infrared receiving diode, and in the case that the high-voltage interlocking connector is well plugged or poorly plugged, the infrared light-emitting diode is in the light-emitting state or the non-light-emitting state respectively, thereby controlling the infrared receiving diode to be in the turned-on state or the turned-off state respectively, so that the second terminal of the infrared receiving diode outputs different signals, thereby realizing detection of the plugging state of the high-voltage interlocking connector.

[0014] In a possible implementation of the first aspect, the driving device comprises a coil, and the controlled device comprises an electromagnetic induction switch. In this embodiment, the driving device is the coil, and the controlled device is the electromagnetic induction switch. When the high-voltage interlocking connector is plugged in well or not well, the coil generates an electric field or does not generate an electric field, respectively, thereby controlling the electromagnetic induction switch to be in a conducting state or a non-conducting state, respectively, so that the second end of the electromagnetic induction switch outputs different signals, thereby detecting the plugging state of the high-voltage interlocking connector.

[0015] In a possible implementation of the first aspect, the driving device comprises a first coil, and the controlled device comprises a second coil. The battery management system further comprises a diode, and the second coil outputs a signal through the diode. In this embodiment, the driving device is the coil, and the controlled device is the electromagnetic induction switch. When the high-voltage interlocking connector is plugged in well or not well, the coil generates an electric field or does not generate an electric field, respectively, thereby controlling the electromagnetic induction switch to be in a conducting state or a non-conducting state, respectively, so that the second end of the electromagnetic induction switch outputs different signals, thereby detecting the plugging state of the high-voltage interlocking connector.

[0016] In a possible implementation of the first aspect, the first power supply end is an alternating current power supply end.

[0017] In a possible implementation of the first aspect, the first power supply end is a direct current power supply end. The battery management system further comprises a first switch tube. The first switch tube and the first coil are connected in series, and the first switch tube is configured to be controlled by a pulse width modulation signal.

[0018] In a possible implementation of the first aspect, the battery management system further comprises a filter unit. The filter unit is connected between the second end of the second coil and the second ground end. The filter unit can be used to filter out interference signals, thereby further improving the anti-interference capability.

[0019] In a possible implementation of the first aspect, the driving device comprises an infrared light-emitting diode, and the controlled device comprises a three-terminal infrared receiver. The positive electrode of the infrared light-emitting diode is the first end of the driving device, and the negative electrode of the infrared light-emitting diode is the second end of the driving device. The ground pin of the three-terminal infrared receiver is the first end of the controlled device, the power supply pin of the three-terminal infrared receiver is electrically connected to the fourth power supply end through the fifth resistor, and the output end of the three-terminal infrared receiver is the second end of the controlled device.

[0020] In this embodiment, the driving device is the infrared light-emitting diode, and the controlled device is the three-terminal infrared receiver. When the high-voltage interlocking connector is plugged in well or not well, the infrared light-emitting diode is in a light-emitting state or a non-light-emitting state, respectively, thereby controlling the three-terminal infrared receiver to output a high level or no level, respectively, thereby detecting the plugging state of the high-voltage interlocking connector.

[0021] In a possible implementation of the first aspect, the battery management system further includes a second resistor and a third resistor connected in series between the third power terminal and the second ground terminal, and the second input terminal of the comparator is connected to a connection node of the second resistor and the third resistor.

[0022] In a possible implementation of the first aspect, the battery management system further includes a fourth resistor connected between the non-inverting input terminal and the output terminal of the comparator.

[0023] In a possible implementation of the first aspect, the battery management system further includes a sixth resistor connected in series with the driving device. The sixth resistor can be used for current limiting to protect devices in the circuit.

[0024] Based on the same technical concept, the second aspect, the embodiments of the present application provide a battery device, including a battery and the battery management system according to any one of the embodiments of the first aspect.

[0025] Based on the same technical concept, the third aspect, the embodiments of the present application provide a power consumption device, including the battery device according to any one of the embodiments of the second aspect.

[0026] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0027] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0028] Figure 1 A structural schematic diagram of a battery management system according to an embodiment of the present application;

[0029] Figure 2 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0030] Figure 3 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0031] Figure 4 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0032] Figure 5 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0033] Figure 6 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0034] Figure 7 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0035] Figure 8 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0036] Figure 9 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0037] Figure 10 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0038] Figure 11 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0039] Figure 12 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0040] Figure 13 A structural schematic diagram of a battery management system according to another embodiment of the present application;

[0041] Figure 14 A structural schematic diagram of a battery management system according to another embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms “include” and “have” and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms “first”, “second” and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "electrically connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or connected internally between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0045] Figure 1 FIG. 1 is a schematic diagram of a battery management system according to an embodiment of the present application. Figure 1 As shown in FIG. 1, the battery management system includes an isolation component 10, the isolation component 10 includes a driving device 11 and a controlled device 12, a first end of the driving device 11 is electrically connected with a first power terminal VCC1 through a high-voltage interlock connector 20, a second end of the driving device 11 is electrically connected with a first ground terminal GND1, a first end of the controlled device 12 is electrically connected with a second ground terminal GND2, and a second end of the controlled device 12 is used for outputting a detection signal. The driving device 11 and the controlled device 12 are configured to: in the case that the high-voltage interlock connector 20 is well plugged, the driving device 11 is connected with the first power terminal VCC1, so that the second end of the controlled device 12 outputs a first signal; in the case that the high-voltage interlock connector 20 is poorly plugged, the driving device 11 is disconnected with the first power terminal VCC1, so that the second end of the controlled device 12 outputs a second signal.

[0046] For example, the high-voltage interlock (HVIL) connector can include a high-voltage terminal and an interlock terminal, the high-voltage terminal is used for connecting a high-voltage loop, and the interlock terminal is used for connecting a detection circuit. The length and position of the high-voltage terminal and the interlock terminal are different, for example, the high-voltage terminal is longer than the interlock terminal, when the high-voltage interlock connector is plugged, the high-voltage terminal is first turned on, and the interlock terminal is turned on later; when the high-voltage interlock connector is unplugged, the interlock terminal is first disconnected, and the high-voltage terminal is disconnected later.

[0047] In the case that the high-voltage interlock connector is poorly plugged, the interlock terminal is disconnected, that is, the interlock signal is disconnected, so that whether the high-voltage interlock connector is poorly plugged can be judged. In the embodiment of the present application, the first end of the driving device 11 is electrically connected with the first power terminal VCC1 through the high-voltage interlock connector 20, in the case that the high-voltage interlock connector 20 is well plugged, the driving device 11 is connected with the first power terminal VCC1, so that the driving device 11 can work under the driving of the first power terminal VCC1, and then control the controlled device 12 to output the first signal. In the case that the high-voltage interlock connector 20 is poorly plugged, the driving device 11 is disconnected with the first power terminal VCC1, the first power terminal VCC1 cannot access the driving device 11, and the driving device 11 is equivalent to in a non-working state, so that the controlled device 12 outputs the second signal.

[0048] It can be understood that the first signal and the second signal are different signals. For example, the voltage of the first signal is greater than the voltage of the second signal, or the voltage of the first signal is less than the voltage of the second signal. By judging whether the output is the first signal or the second signal, it can be determined whether the high-voltage interlocking connector is well plugged.

[0049] For example, the second end of the controlled device 12 can be connected with a general purpose input output (GPIO) port of a microprogrammed control unit (MCU). The MCU can determine whether the high-voltage interlocking connector is well plugged according to whether the GPIO port accesses the first signal or the second signal. When the GPIO port accesses the first signal, the MCU can determine that the high-voltage interlocking connector is well plugged. When the GPIO port accesses the second signal, the MCU can determine that the high-voltage interlocking connector is not well plugged.

[0050] The circuit in which the first power supply end VCC1, the high-voltage interlocking connector 20, the driving device 11 and the first ground end GND1 are located can be referred to as a source end circuit, and the circuit in which the controlled device 12 and the second ground end GND2 are located can be referred to as a return end circuit. The return end circuit can detect the source end circuit, and specifically, the return end circuit can detect whether the high-voltage interlocking connector is well plugged. The first ground end GND1 and the second ground end GND2 are different ground ends. In addition, the controlled device 12 is not connected with the first power supply end. It can be understood that in the embodiment of the present application, power supply isolation and ground isolation are made between the source end circuit and the return end circuit, and the driving device 11 and the controlled device 12 are not directly connected, and electrical isolation is achieved between the two.

[0051] According to the battery management system provided in the embodiment of the present application, the isolation component includes a driving device and a controlled device. In the case that the high-voltage interlocking connector is well plugged or not well plugged, the second end of the controlled device can output different signals. Therefore, according to the signal output by the second end of the controlled device, it can be determined whether the high-voltage interlocking connector is well plugged. In addition, the power supply and the ground end between the driving device and the controlled device are isolated, which can reduce the influence of the surge and noise generated in the plugging process of the high-voltage interlocking connector on the subsequent detection, and improve the anti-interference ability.

[0052] In some embodiments, as Figure 2As shown, the battery management system further comprises a comparator 30, a first input end In1 of the comparator 30 is electrically connected to the second end of the controlled device 12, and a second input end In2 of the comparator 30 is connected to a reference signal Vref; the comparator 30 is configured to output a high level or a low level based on a comparison result of a signal inputted to the first input end In1 and the reference signal Vref inputted to the second input end In2, wherein one of the high level and the low level is used to represent that the high-voltage interlock connector is well plugged, and the other is used to represent that the high-voltage interlock connector is poorly plugged.

[0053] For example, the comparator 30 is electrically connected to a GPIO port of the MCU, and the MCU determines whether the high-voltage interlock connector is poorly plugged according to whether the GPIO port of the MCU inputs a high level or a low level.

[0054] One of the first input end In1 and the second input end In2 is a non-inverting input end of the comparator, and the other is an inverting input end, which is not limited in the present application.

[0055] The signal outputted by the second end of the controlled device may fluctuate, and in the embodiment of the present application, a comparator is further added, which is connected between the second end of the controlled device and the GPIO port of the MCU, which is equivalent to adding an isolation between the second end of the controlled device and the GPIO port of the MCU, so as to further enhance the anti-interference capability. In addition, compared with a scheme of using an analog-to-digital converter (ADC) to detect whether the high-voltage interlock connector is well plugged, the comparator has a lower cost.

[0056] In some embodiments, the second end of the controlled device 12 is electrically connected to the second power supply end VCC2 through a first resistor R1. Figure 3 For example, the second end of the controlled device 12 is electrically connected to the second power supply end VCC2 through a first resistor R1; the driver device 11 and the controlled device 12 are configured to: in the case that the high-voltage interlock connector 20 is well plugged, the driver device 11 is connected to the first power supply end VCC1, and the controlled device 12 is turned on; in the case that the high-voltage interlock connector 20 is poorly plugged, the driver device 11 is disconnected from the first power supply end VCC1, and the controlled device 12 is turned off.

[0057] In the case that the high-voltage interlock connector 20 is well plugged, the controlled device 12 is turned on, the second end of the controlled device 12 is connected to the second ground end GND2, and the potential of the second end of the controlled device 12 is pulled low by the second ground end GND2; in this case, the first signal outputted by the second end of the controlled device 12 is a low level signal.

[0058] In the case that the high-voltage interlocking connector 20 is not plugged in properly, the controlled device 12 is turned off, the second end of the controlled device 12 is connected to the second power supply end VCC2 through the first resistor R1, and the potential of the second end of the controlled device 12 is pulled high by the second power supply end VCC2. In this case, the second signal output by the second end of the controlled device 12 is a high-level signal.

[0059] In the case that the controlled device 12 is turned on, the first resistor R1 can be used as a current-limiting resistor to protect the devices in the circuit.

[0060] In this embodiment, the second end of the controlled device is also electrically connected to the second power supply end. In the case that the high-voltage interlocking connector is plugged in properly or improperly, the driving device controls the controlled device to be turned on or turned off, respectively, so that the second end of the controlled device outputs different signals, thereby realizing detection of the plugging state of the high-voltage interlocking connector.

[0061] In some embodiments, as shown in Figures 3 to 5 , the driving device 11 includes an infrared light-emitting diode D1, and the controlled device 12 includes an infrared receiving diode D2. The positive electrode of the infrared light-emitting diode D1 is the first end of the driving device 11, and the negative electrode of the infrared light-emitting diode D1 is the second end of the driving device 11. The positive electrode of the infrared receiving diode D2 is the first end of the controlled device 12, and the negative electrode of the infrared receiving diode D2 is the second end of the controlled device 12.

[0062] For example, as shown in Figure 3 , no comparator is connected between the infrared receiving diode D2 and the GPIO port. In the case that the high-voltage interlocking connector 20 is plugged in properly, the power supply of the first power supply end VCC1 is connected to the infrared light-emitting diode D1, so that the infrared light-emitting diode D1 emits light. The infrared light emitted by the infrared light-emitting diode D1 makes the infrared receiving diode D2 conductive. After the infrared receiving diode D2 is turned on, it shows a low-impedance state, and the first signal input by the GPIO port is a low-level signal. In the case that the high-voltage interlocking connector 20 is not plugged in properly, the power supply of the first power supply end VCC1 cannot be connected to the infrared light-emitting diode D1, and the infrared light-emitting diode D1 does not emit light. The infrared receiving diode D2 is turned off, and the second signal input by the GPIO port is a high-level signal. That is, in the architecture shown in Figure 3 , if the GPIO port inputs a low-level signal, it can be determined that the high-voltage interlocking connector is plugged in properly; and if the GPIO port inputs a high-level signal, it can be determined that the high-voltage interlocking connector is not plugged in properly.

[0063] For example, as shown in Figure 3 , in the case that no comparator is connected between the infrared receiving diode D2 and the GPIO port, the infrared receiving diode D2 can also be connected to a capacitor C11 for filtering.

[0064] For example, as shown in Figure 4or Figure 5 As shown, the infrared receiving diode D2 can be connected to the GPIO port through comparator 30.

[0065] by Figure 4 For example, the first input terminal In1 is the inverting input terminal of comparator 30, and the second input terminal In2 is the non-inverting input terminal of the comparator. The second input terminal In2 is connected to the third power supply terminal VCC3 through the second resistor R2, and to the second ground terminal GND2 through the third resistor R3. It can be understood that the reference signal connected to the second input terminal In2 is the voltage divider of the third power supply terminal VCC3 by the third resistor R3. With the high-voltage interlock connector 20 properly connected, the power supply to the first power supply terminal VCC1 is connected to the infrared LED D1, causing the infrared LED D1 to emit light. The infrared light emitted by the infrared LED D1 turns on the infrared receiving diode D2. After the infrared receiving diode D2 turns on, the first input terminal In1 is connected to a low voltage, and the voltage of the first input terminal In1 is less than the voltage of the second input terminal In2. Therefore, comparator 30 outputs a high level, and the GPIO port is connected to a high level. In the event of a faulty high-voltage interlock connector 20, the power supply to the first power supply terminal VCC1 cannot be connected to the infrared LED D1, causing LED D1 to not emit light. The infrared receiving diode D2 is disconnected, and the first input terminal In1 is connected to a high level. Since the voltage at the first input terminal In1 is greater than the voltage at the second input terminal In2, comparator 30 outputs a low level, and the GPIO port is connected to a low level. In other words, in Figure 4 In the architecture shown, if the GPIO port is connected to a high level, it can be determined that the high-voltage interlock connector is properly connected; if the GPIO port is connected to a low level, it can be determined that the high-voltage interlock connector is improperly connected.

[0066] by Figure 5For example, the first input end In1 is the non-inverting input end of the comparator 30, and the second input end In2 is the inverting input end of the comparator. The second input end In2 is connected to the third power supply end VCC3 through the second resistor R2, and is connected to the second ground end GND2 through the third resistor R3. It can be understood that the reference signal input to the second input end In2 is the voltage division of the third resistor R3 on the third power supply end VCC3. In the case that the high-voltage interlocking connector 20 is properly plugged, the power supply of the first power supply end VCC1 is input to the infrared emitting diode D1, so that the infrared emitting diode D1 emits light. The infrared light emitted by the infrared emitting diode D1 makes the infrared receiving diode D2 conduct. After the infrared receiving diode D2 is turned on, the first input end In1 inputs a low voltage, the voltage of the first input end In1 is lower than that of the second input end In2, the comparator 30 outputs a low level, and the GPIO port inputs a low level. In the case that the high-voltage interlocking connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be input to the infrared emitting diode D1, the infrared emitting diode D1 does not emit light, the infrared receiving diode D2 is turned off, the first input end In1 inputs a high voltage, the voltage of the first input end In1 is higher than that of the second input end In2, the comparator 30 outputs a high level, and the GPIO port inputs a high level. That is, in the architecture shown in Figure 5 the case that the GPIO port inputs a low level, it can be determined that the high-voltage interlocking connector is properly plugged; and in the case that the GPIO port inputs a high level, it can be determined that the high-voltage interlocking connector is improperly plugged.

[0067] In this embodiment, the driving device is an infrared emitting diode, and the controlled device is an infrared receiving diode. In the case that the high-voltage interlocking connector is properly or improperly plugged, the infrared emitting diode is in the state of emitting light or not emitting light, respectively, so as to control the infrared receiving diode to be in the state of being turned on or turned off, respectively, so that the second end of the infrared receiving diode outputs different signals, thereby realizing the detection of the plugging state of the high-voltage interlocking connector.

[0068] In addition, the infrared emitting diode and the infrared receiving diode constitute a set of infrared pairs, which have a lower cost compared with the photoelectric coupler.

[0069] In other embodiments, as shown in Figures 6 to 8 the driving device 11 includes a coil L, and the controlled device 12 includes an electromagnetic induction switch K.

[0070] The two ends of the coil L are respectively the two ends of the driving device 11, and the two ends of the electromagnetic induction switch K are respectively the two ends of the controlled device 12. It can be understood that the coil L and the electromagnetic induction switch K constitute a relay.

[0071] In the case that the high-voltage interlocking connector 20 is properly plugged, the power supply of the first power supply end VCC1 is input to the coil L, so that the coil L generates a magnetic field. The magnetic field generated by the coil L makes the electromagnetic induction switch K conduct. After the electromagnetic induction switch K is turned on, the first input end In1 inputs a low voltage, the voltage of the first input end In1 is lower than that of the second input end In2, the comparator 30 outputs a low level, and the GPIO port inputs a low level. In the case that the high-voltage interlocking connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be input to the coil L, the coil L does not generate a magnetic field, the electromagnetic induction switch K is turned off, the first input end In1 inputs a high voltage, the voltage of the first input end In1 is higher than that of the second input end In2, the comparator 30 outputs a high level, and the GPIO port inputs a high level. That is, in the architecture shown in Figure 6For example, the electromagnetic induction switch K is directly connected with the GPIO port. In the case that the high-voltage interlock connector 20 is properly plugged, the power supply of the first power supply end VCC1 is connected to the coil L, the coil L generates an electric field, so that the electromagnetic induction switch K is turned on. After the electromagnetic induction switch K is turned on, the first signal input to the GPIO port is low. In the case that the high-voltage interlock connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be connected to the coil L, the electromagnetic induction switch K is turned off, and the second signal input to the GPIO port is high. That is, in the architecture shown in Figure 6 , if the GPIO port inputs low, it can be determined that the high-voltage interlock connector is properly plugged; and if the GPIO port inputs high, it can be determined that the high-voltage interlock connector is improperly plugged.

[0072] For example, as shown in Figure 6 , in the case that the electromagnetic induction switch K is directly connected with the GPIO port, the electromagnetic induction switch K is also connected with the capacitor C12 for filtering.

[0073] As shown in Figure 7 or Figure 8 , the electromagnetic induction switch K can be connected with the GPIO port through the comparator 30.

[0074] For example, as shown in Figure 7 , the first input end In1 is the inverting input end of the comparator 30, and the second input end In2 is the non-inverting input end of the comparator. The second input end In2 is connected with the third power supply end VCC3 through the second resistor R2, and is connected with the second ground end GND2 through the third resistor R3. It can be understood that the reference signal input to the second input end In2 is the voltage division of the third resistor R3 to the third power supply end VCC3. In the case that the high-voltage interlock connector 20 is properly plugged, the power supply of the first power supply end VCC1 is connected to the coil L, the coil L generates an electric field, so that the electromagnetic induction switch K is turned on. After the electromagnetic induction switch K is turned on, the first input end In1 inputs low voltage, the voltage of the first input end In1 is less than that of the second input end In2, the comparator 30 outputs high, and the GPIO port inputs high. In the case that the high-voltage interlock connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be connected to the coil L, the electromagnetic induction switch K is turned off, the first input end In1 inputs high, the voltage of the first input end In1 is greater than that of the second input end In2, the comparator 30 outputs low, and the GPIO port inputs low. That is, in the architecture shown in Figure 7 , if the GPIO port inputs high, it can be determined that the high-voltage interlock connector is properly plugged; and if the GPIO port inputs low, it can be determined that the high-voltage interlock connector is improperly plugged.

[0075] For example, as shown in Figure 8For example, the first input end In1 is the non-inverting input end of the comparator 30, and the second input end In2 is the inverting input end of the comparator. The second input end In2 is connected to the third power supply end VCC3 through the second resistor R2, and is connected to the second ground end GND2 through the third resistor R3. It can be understood that the reference signal input to the second input end In2 is the voltage division of the third resistor R3 on the third power supply end VCC3. In the case that the high-voltage interlock connector 20 is properly plugged, the power supply of the first power supply end VCC1 is connected to the coil L, the coil L generates an electric field, and the electromagnetic induction switch K is turned on. After the electromagnetic induction switch K is turned on, the first input end In1 inputs a low voltage, the voltage of the first input end In1 is less than that of the second input end In2, the comparator 30 outputs a low level, and the GPIO port inputs a low level. In the case that the high-voltage interlock connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be connected to the coil L, the electromagnetic induction switch K is turned off, the first input end In1 inputs a high level, the voltage of the first input end In1 is greater than that of the second input end In2, the comparator 30 outputs a high level, and the GPIO port inputs a high level. That is, in the case that the GPIO port inputs a low level under the architecture shown in Figure 8 the high-voltage interlock connector can be determined to be properly plugged; and in the case that the GPIO port inputs a high level, it can be determined that the high-voltage interlock connector is improperly plugged.

[0076] In this embodiment, the driving device is a coil, and the controlled device is an electromagnetic induction switch. In the case that the high-voltage interlock connector is properly or improperly plugged, the coil generates or does not generate an electric field, respectively, to control the electromagnetic induction switch to be turned on or turned off, respectively, so that the second end of the electromagnetic induction switch outputs different signals, thereby realizing detection of the plugging state of the high-voltage interlock connector.

[0077] In other embodiments, as shown in Figures 9 to 13 the driving device 11 includes a first coil L1, and the controlled device 12 includes a second coil L2. The battery management system further includes a diode D3, and the second coil L2 outputs a signal through the diode D3. The diode D3 can rectify the alternating signal output by the second coil to output a direct current signal.

[0078] The two ends of the first coil L1 are respectively the two ends of the driving device 11, and the two ends of the second coil L2 are respectively the two ends of the controlled device 12. It can be understood that the first coil L1 and the second coil L2 constitute an isolation transformer. The first coil L1 is the primary side of the transformer, and the second coil L2 is the secondary side of the transformer. In the case that the primary side of the transformer is connected to an alternating current, the secondary side of the transformer generates an induced electromotive force. In the case that the primary side of the transformer is not connected to an alternating current, the secondary side of the transformer cannot generate an induced electromotive force, and the secondary side is equivalent to a piece of wire.

[0079] For example, Figure 9For example, if no comparator is connected between the second coil L2 and the GPIO port, and the high-voltage interlock connector 20 is properly connected, the first coil L1 is connected to AC power through the first power supply terminal VCC1. The second coil L2 generates an induced electromotive force, which is rectified by diode D3 and output, resulting in a high level on the GPIO port. If the high-voltage interlock connector 20 is not properly connected, the power supply to the first power supply terminal VCC1 cannot be connected to the first coil L1, and the GPIO port is connected to a low level. In other words, in... Figure 9 In the architecture shown, if the GPIO port is connected to a high level, it can be determined that the high-voltage interlock connector is properly connected; if the GPIO port is connected to a low level, it can be determined that the high-voltage interlock connector is improperly connected.

[0080] like Figure 10 or Figure 11 As shown, the second coil L2 can be connected to the GPIO port via comparator 30.

[0081] by Figure 10 For example, the first input terminal In1 is the inverting input terminal of comparator 30, and the second input terminal In2 is the non-inverting input terminal of the comparator. The second input terminal In2 is connected to the third power supply terminal VCC3 through the second resistor R2, and to the second ground terminal GND2 through the third resistor R3. It can be understood that the reference signal connected to the second input terminal In2 is the voltage division of the third power supply terminal VCC3 by the third resistor R3. When the high-voltage interlock connector 20 is properly connected, the first coil L1 is connected to AC power through the first power supply terminal VCC1, and the second coil L2 generates an induced electromotive force, which is rectified by diode D3 and output. The first input terminal In1 is connected to a high voltage, and the voltage at the first input terminal In1 is greater than the voltage at the second input terminal In2. Therefore, comparator 30 outputs a low level, and the GPIO port is connected to a low level. In the event of a faulty high-voltage interlock connector 20, the power supply to the first power supply terminal VCC1 cannot be connected to the first coil L1. The first input terminal In1 is connected to a low level, and the voltage at the first input terminal In1 is less than the voltage at the second input terminal In2. Therefore, comparator 30 outputs a high level, and the GPIO port is connected to a high level. In other words, in Figure 10 In the architecture shown, if the GPIO port is connected to a low level, it can be determined that the high-voltage interlock connector is properly connected; if the GPIO port is connected to a high level, it can be determined that the high-voltage interlock connector is improperly connected.

[0082] by Figure 11For example, the first input end In1 is the non-inverting input end of the comparator 30, and the second input end In2 is the inverting input end of the comparator. The second input end In2 is connected to the third power supply end VCC3 through the second resistor R2, and is connected to the second ground end GND2 through the third resistor R3. It can be understood that the reference signal input to the second input end In2 is the voltage division of the third resistor R3 on the third power supply end VCC3. In the case that the high-voltage interlock connector 20 is properly plugged, the first coil L1 is connected to the alternating current through the first power supply end VCC1, the second coil L2 generates an induced electromotive force, and the induced electromotive force is output after being rectified by the diode D3. The first input end In1 inputs a high level, the voltage of the first input end In1 is greater than the voltage of the second input end In2, the comparator 30 outputs a high level, and the GPIO port inputs a high level. In the case that the high-voltage interlock connector 20 is improperly plugged, the power supply of the first power supply end VCC1 cannot be connected to the first coil L1, and the second coil L2 cannot generate an induced electromotive force. The first input end In1 inputs a low level, the voltage of the first input end In1 is less than the voltage of the second input end In2, the comparator 30 outputs a low level, and the GPIO port inputs a low level. That is, in the architecture shown in Figure 11 the case that the GPIO port inputs a high level, it can be determined that the high-voltage interlock connector is properly plugged; and in the case that the GPIO port inputs a low level, it can be determined that the high-voltage interlock connector is improperly plugged.

[0083] In this embodiment, the driving device is a coil, and the controlled device is an electromagnetic induction switch. In the case that the high-voltage interlock connector is properly or improperly plugged, the coil respectively generates or does not generate an electric field, thereby respectively controlling the electromagnetic induction switch to be in a conducting or non-conducting state, so that the second end of the electromagnetic induction switch outputs different signals, thereby realizing detection of the plugging state of the high-voltage interlock connector.

[0084] In some embodiments, in the case that the isolation component includes a transformer, as shown in Figures 9 to 11 the first power supply end VCC1 can be an alternating current power supply end. The first power supply end VCC1 directly outputs alternating current to drive the transformer.

[0085] In other embodiments, in the case that the isolation component includes a transformer, as shown in Figure 12 or Figure 13 the first power supply end VCC1 can be a direct current power supply end, and the battery management system further includes a first switch tube Q1. The first switch tube Q1 and the first coil L1 are connected in series, and the first switch tube Q1 is configured to be controlled by a pulse width modulation signal PWM.

[0086] The pulse width modulation signal PWM controls the conduction or non-conduction of the first switch tube Q1. In the case that the high-voltage interlock connector is properly plugged, an alternating signal can be generated, thereby forming an alternating current.

[0087] In some embodiments, in the case that the isolation component comprises a transformer, as shown in Figures 9 to 13 the battery management system further comprises a filter unit connected between the second end of the second coil and the second ground end. The filter unit can be used to filter out interference signals to further improve the anti-interference capability.

[0088] As an example, as shown in Figure 9 the filter unit comprises a capacitor C1, a capacitor C13 and a resistor R7. The resistor R7 can also serve as a current limiting resistor. The capacitor C1 can also serve as a storage capacitor.

[0089] As another example, as shown in Figures 10 to 13 the filter unit comprises a capacitor C1.

[0090] The above introduces examples that the isolation component can comprise an infrared pair tube, or a relay, or a transformer. In yet some embodiments, as shown in Figure 14 the driving device in the isolation component comprises an infrared light emitting diode D1, and the controlled device comprises a three-terminal infrared receiver 121. The positive electrode of the infrared light emitting diode D1 is the first end of the driving device, and the negative electrode of the infrared light emitting diode D1 is the second end of the driving device; the ground pin of the three-terminal infrared receiver 121 is the first end of the controlled device, the power pin of the three-terminal infrared receiver 121 is electrically connected to the fourth power supply end VCC4 through the fifth resistor R5, and the output end of the three-terminal infrared receiver is the second end of the controlled device.

[0091] The output end of the three-terminal infrared receiver 121 and the GPIO port can not be connected to a comparator. In the case that the high-voltage interlock connector 20 is well plugged, the power supply of the first power supply end VCC1 is connected to the infrared light emitting diode D1, so that the output end of the three-terminal infrared receiver 121 outputs a high level, and the GPIO port inputs a high level. In the case that the high-voltage interlock connector 20 is not well plugged, the power supply of the first power supply end VCC1 cannot be connected to the infrared light emitting diode D1, the infrared light emitting diode D1 does not emit light, the three-terminal infrared receiver 121 does not output, and the GPIO port inputs a low level. That is, in the architecture shown in Figure 14 if the GPIO port inputs a high level, it can be determined that the high-voltage interlock connector is well plugged; and if the GPIO port inputs a low level, it can be determined that the high-voltage interlock connector is not well plugged.

[0092] For example, the output end of the three-terminal infrared receiver 121 and the GPIO port can be connected through a resistor R8, and the resistor R8 can limit the current.

[0093] In this embodiment, the driving device is an infrared light-emitting diode (LED) and the controlled device is a three-terminal infrared receiver. When the high-voltage interlock connector is properly or improperly connected, the infrared LED will light up or not light up, respectively, thereby controlling the three-terminal infrared receiver to output a high level or not output a level, thus realizing the detection of the connection status of the high-voltage interlock connector.

[0094] In some embodiments, with Figure 4 For example, the battery management system also includes a second resistor R2 and a third resistor R3, which are connected in series between the third power supply terminal VCC3 and the second ground terminal GND2. The second input terminal In2 of the comparator 30 is connected to the connection node of the second resistor R2 and the third resistor R3. In this way, the second resistor R2 and the third resistor R3 divide the voltage of the third power supply terminal VCC3, so that the second input terminal In2 of the comparator 30 is connected to a reference signal. By controlling the voltage of the third power supply terminal VCC3, or by controlling the resistance of the second resistor R2 and the third resistor R3, the magnitude of the reference signal connected to the second input terminal In2 can be controlled.

[0095] For example, the third power supply terminal VCC3 and the second power supply terminal VCC2 can be the same power supply terminal.

[0096] In some embodiments, still using Figure 4 For example, the battery management system also includes a fourth resistor R4, which is connected between the non-inverting input and the output of comparator 30. Thus, the fourth resistor and the comparator together form a hysteresis comparator, which can further improve the anti-interference capability.

[0097] Figure 4 The second input terminal In2 is the non-inverting input terminal, and the fourth resistor R4 is connected between the second input terminal In2 and the output terminal of comparator 30.

[0098] In other examples, with Figure 5 For example, the first input terminal In1 is the non-inverting input terminal, and the fourth resistor R4 is connected between the first input terminal In1 and the output terminal of comparator 30.

[0099] In some embodiments, with Figure 3 For example, the battery management system also includes a sixth resistor R6, which is connected in series with the driver device 11 of the isolation component. The sixth resistor can be used for current limiting to protect the devices in the circuit.

[0100] Based on the same technical concept, the application further provides a battery device comprising a battery and the battery management system according to any one of the above embodiments. It can be understood that the battery device has the beneficial effects of the battery management system provided by the embodiments of the application, and the specific description of the battery management system can be referred to the above embodiments, which will not be repeated here.

[0101] Based on the same technical concept, the application further provides a battery device comprising a battery and the battery management system according to any one of the above embodiments. It can be understood that the battery device has the beneficial effects of the battery management system provided by the embodiments of the application, and the specific description of the battery management system can be referred to the above embodiments, which will not be repeated here.

[0102] It should be noted that in the above embodiments, the resistance is in the form of a single resistance. In other embodiments, the resistance can also be an integrated series, parallel or mixed resistance. In addition, in the above embodiments, the capacitor is in the form of a single capacitor. In other embodiments, the capacitor can also be an integrated series, parallel or mixed capacitor. The specific parameters of each device can be set according to actual needs, and the application does not limit this.

[0103] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0104] Although the application has been described with reference to the preferred embodiments, various improvements can be made and parts thereof can be replaced with equivalents without departing from the scope of the application, and in particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery management system, characterized by, The isolation assembly comprises a driving device and a controlled device, a first end of the driving device is electrically connected with a first power end through a high-voltage interlocking connector, a second end of the driving device is electrically connected with a first ground end, a first end of the controlled device is electrically connected with a second ground end, and a second end of the controlled device is used for outputting a detection signal; The driving device and the controlled device are configured to: in the case that the high-voltage interlocking connector is well plugged, the driving device is connected with the first power end, so that the second end of the controlled device outputs a first signal; in the case that the high-voltage interlocking connector is poorly plugged, the driving device is disconnected with the first power end, so that the second end of the controlled device outputs a second signal.

2. The battery management system of claim 1, wherein, The battery management system further comprises a comparator, a first input end of the comparator is electrically connected with the second end of the controlled device, and a second input end of the comparator is connected with a reference signal; The comparator is configured to output a high level or a low level based on a comparison result of the signal inputted through the first input end and the reference signal inputted through the second input end, wherein one of the high level and the low level is used to represent that the high-voltage interlocking connector is well plugged, and the other is used to represent that the high-voltage interlocking connector is poorly plugged.

3. The battery management system of claim 1 or 2, wherein, The second end of the controlled device is further electrically connected with a second power end through a first resistor; The driving device and the controlled device are configured to: in the case that the high-voltage interlocking connector is well plugged, the driving device is connected with the first power end, and the controlled device is turned on; in the case that the high-voltage interlocking connector is poorly plugged, the driving device is disconnected with the first power end, and the controlled device is turned off.

4. The battery management system of claim 3, wherein, The driving device comprises an infrared light-emitting diode, and the controlled device comprises an infrared receiving diode; A positive electrode of the infrared light-emitting diode is the first end of the driving device, and a negative electrode of the infrared light-emitting diode is the second end of the driving device; A positive electrode of the infrared receiving diode is the first end of the controlled device, and a negative electrode of the infrared receiving diode is the second end of the controlled device.

5. The battery management system of claim 3, wherein, The driving device comprises a coil, and the controlled device comprises an electromagnetic induction switch.

6. The battery management system of claim 2, wherein, The driving device comprises a first coil, and the controlled device comprises a second coil; The battery management system further comprises a diode, and the second coil outputs a signal through the diode.

7. The battery management system of claim 6, wherein, The first power end is an alternating current power end.

8. The battery management system of claim 6, wherein, The first power end is a direct current power end, the battery management system further comprises a first switch tube, the first switch tube and the first coil are connected in series, and the first switch tube is configured to be controlled by a pulse width modulation signal.

9. The battery management system of claim 6, wherein, The battery management system further comprises a filter unit, and the filter unit is connected between a second end of the second coil and the second ground end.

10. The battery management system of claim 1, wherein, The driving device comprises an infrared light-emitting diode, and the controlled device comprises a three-terminal infrared receiver; A positive electrode of the infrared light-emitting diode is the first end of the driving device, and a negative electrode of the infrared light-emitting diode is the second end of the driving device; The ground pin of the three-terminal infrared receiver is the first terminal of the controlled device, the power pin of the three-terminal infrared receiver is electrically connected to the fourth power terminal through a fifth resistor, and the output terminal of the three-terminal infrared receiver is the second terminal of the controlled device.

11. The battery management system of claim 2, wherein, The battery management system further comprises a second resistor and a third resistor connected in series between the third power terminal and the second ground terminal, and the second input terminal of the comparator is connected to the connection node of the second resistor and the third resistor.

12. The battery management system of claim 11, wherein, The battery management system further comprises a fourth resistor connected between the non-inverting input terminal and the output terminal of the comparator.

13. The battery management system of any one of claims 1-12, wherein, The battery management system further comprises a sixth resistor connected in series with the driving device.

14. A battery device characterized by comprising: A battery and a battery management system as claimed in any one of claims 1 to 13.

15. An electrical device, comprising: A battery device as claimed in claim 14.

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