CN207496476U - High-voltage detecting circuit, detector, cell apparatus and delivery vehicle - Google Patents

Abstract

The utility model proposes a high-voltage detection circuit, a detector, a battery device and a vehicle, wherein the high-voltage detection circuit includes: a controller with a signal receiving port and a signal output port; a current detection sub-circuit, the first of the current detection sub-circuit One end is connected to the signal receiving port of the controller, the second end of the current detection sub-circuit is connected to the inner side of the main negative switch in the battery high-voltage circuit; the switch driving sub-circuit, the first end of the switch driving sub-circuit is connected to the controller The signal output port, the second end of the switch driving sub-circuit is connected to the switch to be controlled in the high voltage circuit of the battery. The technical scheme of the utility model saves the cost of the wires consumed by the isolation unit and the long-distance connection, improves the safety of the circuit, and at least shortens the transmission distance of the switch control signal, which not only reduces the transmission distance of the switch control signal The energy loss makes the control of the switch to be controlled more precise, and improves the transmission speed of the switch control signal.

Description

High Voltage Detection Circuits, Detectors, Battery Units and Vehicles

【Technical field】

The utility model relates to the technical field of batteries, in particular to a high-voltage detection circuit, a detector, a battery device and a vehicle.

【Background technique】

At present, the replacement of fuel vehicles by electric vehicles has become the development trend of the automobile industry, and the safety of vehicle batteries has become one of the problems hindering the promotion of electric vehicles. At present, in order to reduce the safety risk of the high-voltage circuit of the vehicle battery during work, it is necessary to control the state of each relay in the high-voltage circuit, so as to control the relevant relays in the high-voltage circuit when work is required or unsafe factors are detected. open or closed.

In the related art, the circuits where the relays in the high-voltage circuit of the vehicle battery are located are set separately, and are all connected to the battery management unit (Battery Management Unit, BMU) of the low-voltage part of the vehicle battery, and are controlled by the battery management unit, so that A wiring harness is required to connect the low voltage part and the high voltage circuit.

In this regard, in order to ensure that both the low-voltage part and the high-voltage circuit can work normally, an isolation unit is required to isolate the low-voltage part from the high-voltage circuit. However, this circuit design is complex and error-prone, and the cost of setting up the isolation unit is also high.

Therefore, there is at least a technical problem in the related art that the internal circuit structure of the vehicle battery is too complicated.

【Content of utility model】

The embodiment of the utility model provides a high-voltage detection circuit, a detector, a battery device and a vehicle, aiming at solving the technical problem that the internal circuit structure of the vehicle battery is too complicated in the related art, and can simplify the internal circuit structure of the vehicle battery, reduce the its cost.

In the first aspect, the embodiment of the utility model provides a high-voltage detection circuit, including: a controller with a signal receiving port and a signal output port; a current detection sub-circuit, the first end of which is connected to the The signal receiving port of the controller, the second end of the current detection sub-circuit is connected to the inner side of the main negative switch in the high-voltage circuit of the battery; the switch driving sub-circuit, the first end of the switch driving sub-circuit is connected to To the signal output port of the controller, the second end of the switch driving sub-circuit is connected to the switch to be controlled in the battery high voltage circuit.

In the above embodiments of the present invention, optionally, further comprising: a switch to be controlled, connected to the switch driving sub-circuit, for collecting the switch driving signal, and adjusting the on-off state according to the switch driving signal.

In the above embodiments of the present invention, optionally, it further includes: the switch to be controlled includes at least one of a pre-charging switch, a slow charging switch, a heating switch, a main negative switch, a main positive switch and a fast charging switch.

In the above embodiments of the present invention, optionally, the switch to be controlled includes a relay and/or a MOS tube.

In the above embodiments of the present invention, optionally, the number of the switch driving sub-circuits, the number of the signal output ports and the number of the switches to be controlled are all one or more; each of the switch driving The first terminals of the subcircuits are used to collect the switch control signals through the signal output ports, and the second terminals of each switch driving subcircuit are used to transmit the switch driving signals to the switches to be controlled.

In the above embodiments of the present invention, optionally, the switch driving sub-circuit includes: a switch driver, the first end of the switch driver is connected to the signal output port, and the second end of the switch driver is connected to The switch to be controlled.

In the above embodiments of the present utility model, optionally, the current detection sub-circuit includes: a current detection component, the first terminal of the current detection component is connected to the negative pole of the battery module, and the second terminal of the current detection component terminal is connected to the inner side of the main negative switch, and the third terminal and the fourth terminal of the current detection component are both connected to the controller.

In the above embodiments of the present utility model, optionally, the current detection component includes: a shunt, the shunt has a built-in resistance, the first end of the shunt is connected to the negative pole of the battery module, and the The second end of the shunt is connected to the inner side of the main negative switch, and both ends of the built-in resistor of the shunt are connected to the controller.

In the above embodiments of the present utility model, optionally, the current detection sub-circuit further includes: a first temperature sensing component, arranged outside the shunt and in contact with the built-in resistance of the shunt, connected to the controller.

In the above embodiments of the present invention, optionally, the first temperature sensing component is a negative temperature coefficient thermistor.

In the above-mentioned embodiments of the present invention, optionally, it also includes: an isolation strip, which is arranged at the edge area where the battery high-voltage circuit and the battery low-voltage circuit are connected; the controller also has a communication signal sending and receiving port, correspondingly, the The high voltage detection circuit further includes: a communication component, arranged at the position of the isolation zone, the first end of the communication component is connected to the communication signal transceiving port of the controller, and the second end of the communication component General control system connected to peripherals.

In the above embodiments of the present utility model, optionally, the communication component is an isolation chip.

In the above embodiments of the present invention, optionally, the controller also has a power receiving port, and correspondingly, the high voltage detection circuit further includes: a power supply component, arranged at the position of the isolation zone, connected to the The power receiving port of the controller.

In a second aspect, an embodiment of the present invention provides a detector, including the high voltage detection circuit described in any one of the above embodiments.

In a third aspect, an embodiment of the present invention provides a battery device, including the high voltage detection circuit described in any one of the above embodiments.

In a fourth aspect, an embodiment of the present utility model provides a vehicle, including the high voltage detection circuit described in any one of the above embodiments.

In addition, an embodiment of the present utility model provides a circuit board for integrating a high-voltage circuit of a battery or a detection circuit of the high-voltage circuit of the battery, including the high-voltage detection circuit described in any one of the above-mentioned embodiments.

The above technical solution aims at the technical problem that the internal circuit structure of the vehicle battery in the related art is too complicated, and integrates the mutually independent current detection sub-circuit and each switch driving sub-circuit in the high-voltage circuit of the battery, and integrates the current detection sub-circuit and each The switch drive sub-circuits are all connected to the controller originally used to control the current detection sub-circuit, and the original connection to the BMU is replaced by the way of connecting the controller. The current signal inside the switch can also send a switch control signal to the switch drive sub-circuit, so that the switch drive sub-circuit drives the switch to be controlled to open or close according to the switch control signal.

In this way, each switch driving sub-circuit does not need to be connected to the BMU of the low-voltage part, so there is no need to set up an isolation unit in the related art to isolate the high-voltage circuit from the low-voltage part, which saves the cost of the isolation unit and the wires consumed by long-distance connections , also improves the security of the circuit. At the same time, on this basis, at least the transmission distance of the switch control signal is shortened, which not only reduces the energy loss of the switch control signal during transmission, makes the control of the control switch more accurate, but also improves the transmission speed of the switch control signal , thereby improving the performance of the battery as a whole.

【Description of drawings】

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 shows the overall schematic diagram of the high voltage detection circuit of an embodiment of the present invention;

Fig. 2 shows the schematic diagram of the high voltage detection circuit of another embodiment of the present invention;

Fig. 3 shows the schematic diagram of the high voltage detection circuit of another embodiment of the present invention;

Fig. 4 shows the schematic circuit diagram of the high voltage detection circuit of an embodiment of the present invention;

Fig. 5 shows a schematic circuit diagram of a high voltage detection circuit of another embodiment of the present invention;

Fig. 6 shows a schematic diagram of the interaction circuit between the circuit of the high voltage detection circuit and the battery module in Fig. 5;

Fig. 7 shows the block diagram of the circuit board of an embodiment of the present utility model;

Fig. 8 shows the block diagram of the detector of an embodiment of the present utility model;

Fig. 9 shows a block diagram of a battery device according to an embodiment of the present invention;

Figure 10 shows a block diagram of a vehicle of one embodiment of the present invention.

【Detailed ways】

In order to better understand the technical solution of the utility model, the embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include plural forms unless the context clearly indicates otherwise.

Fig. 1 shows an overall schematic diagram of a high voltage detection circuit according to an embodiment of the present invention.

As shown in FIG. 1 , the embodiment of the present invention provides a high-voltage detection circuit 100 , including: a controller 102 , a current detection sub-circuit 104 and a switch driving sub-circuit 106 . The controller 102 has a signal receiving port 1024 and a signal output port 1022. The first end of the current detection sub-circuit 104 is connected to the signal receiving port 1024 of the controller 102, and the second end of the current detection sub-circuit 104 is connected to the battery in the high voltage circuit. Inside the main negative switch 204, the first end of the switch driving sub-circuit 106 is connected to the signal output port 1022 of the controller 102, and the second end of the switch driving sub-circuit 106 is connected to the switch 108 to be controlled in the battery high voltage circuit.

One end of the switch close to the battery module 202 is called the inside of the switch, and the other end is called the outside of the switch. Here, the inside of the main negative switch 204 refers to the end of the main negative switch 204 close to the battery module 202 . In addition, there are other partial circuits 206 in the battery high-voltage circuit, and the specific structures of other partial circuits 206 are not shown in the figure.

Among them, the current detection sub-circuit 104 is used to collect the current signal inside the main negative switch 204 in the high-voltage circuit of the battery, and transmit the current signal to the signal receiving port 1024, and the controller 102 is used to receive the current signal through the signal receiving port 1024 Since the inner side of the main negative switch 204 is connected to the negative pole of the battery module 202, the controller 102 can judge whether the battery module 202 is in a normal working state according to the range of the current signal.

The switch drive sub-circuit 106 is used to collect the switch control signal through the signal output port 1022, generate a corresponding switch drive signal according to the switch control signal, and send the switch drive signal to the switch to be controlled 108, and drive the switch to be controlled 108 to turn on or closure. For example, when the switch to be controlled 108 is a slow charging switch, the controller 102 controls the switch driving sub-circuit 106 to control the on and off of the slow charging switch, so as to satisfy the slow charging function requirement of the battery.

To sum up, the mutually independent current detection sub-circuit 104 and each switch driving sub-circuit 106 in the battery high-voltage circuit are integrated together, and the current detection sub-circuit 104 and each switch driving sub-circuit 106 are connected to the current detection sub-circuit originally used to control the current detection sub-circuit. The controller 102 of the circuit 104 replaces the original way of connecting the BMU with the way of connecting the controller 102. The controller 102 can control and detect the current signal inside the main negative switch 204 in the high-voltage circuit of the battery, and can also send The switch driving sub-circuit 106 sends a switch control signal, so that the switch driving sub-circuit 106 drives the switch 108 to be controlled to open or close according to the switch control signal.

In this way, each switch driving sub-circuit 106 does not need to be connected to the BMU of the low-voltage part, so there is no need to set the isolation unit in the related art to isolate the high-voltage circuit and the low-voltage part, which saves the consumption of the isolation unit and the long-distance connection. Cost, but also enhance the safety of the circuit. At the same time, on this basis, at least the transmission distance of the switch control signal is shortened, which not only reduces the energy loss of the switch control signal during transmission, makes the control of the control switch 108 more accurate, but also improves the transmission of the switch control signal. speed, thereby improving the performance of the battery as a whole.

Fig. 2 shows a schematic diagram of a high voltage detection circuit according to another embodiment of the present invention.

As shown in FIG. 2 , on the basis of the structure shown in FIG. 1 , it also includes: a switch to be controlled 108 connected to the switch driving sub-circuit 106 for collecting the switch driving signal and adjusting the on-off state according to the switch driving signal.

That is to say, in the embodiment shown in FIG. 1, only the switch driving subcircuit 106 originally controlled by the BMU is integrated with the current detection subcircuit 104, and the controller 102 controlling the current detection subcircuit 104 control, and in the embodiment shown in FIG. 2 , the switch drive subcircuit 106 and the switch 108 to be controlled driven by it are integrated together with the current detection subcircuit 104, and the controller 102 controlling the current detection subcircuit 104 to control.

The quantity of the switch driving subcircuit 106, the quantity of the signal output port 1022 and the quantity of the switch 108 to be controlled are all one or more; the first end of each switch driving subcircuit 106 is used to collect the switch control signal through the signal output port 1022 , the second end of each switch driving sub-circuit 106 is used to transmit the switch driving signal to the switch 108 to be controlled.

On this basis, in an implementation of the present invention, each switch 108 to be controlled corresponds to a switch driving sub-circuit 106 , and for a single switch driving sub-circuit 106 , it may correspond to a single signal output port 1022 . In this way, it can be ensured that the switch control signals of different switches to be controlled 108 can be accurately controlled to the switch to be controlled 108, avoiding the situation that the switch control signal is wrongly transmitted to other switches that do not need to be controlled, and improving It ensures the accuracy of switch control and provides a basis for protecting battery safety.

In another implementation of the present utility model, multiple switch driving sub-circuits 106 can be connected to the same signal output port 1022, and at the same time, one switch driving sub-circuit 106 can also be connected with multiple switches 108 to be controlled, so that The number of ports of the used controller 102 can be saved, the circuit can be further simplified, and the cost can be reduced.

It should be added that the switch 108 to be controlled includes a relay and/or a MOS transistor (Metal Oxide Semiconductor, metal-oxide-semiconductor field effect transistor). The common point of relays and MOS tubes is that they can control large currents with small signals. Among them, relays are current-driven, have the advantages of good overcurrent resistance and overheat resistance, and can be electrically isolated, that is, they have lower environmental requirements. , while the MOS tube is voltage-driven, which can handle a larger frequency range and has a lower cost than the relay.

Fig. 3 shows a schematic diagram of a high voltage detection circuit of another embodiment of the present utility model. In Fig. 3, the switches to be controlled include a precharge switch 2082, a slow charge switch 2084 and a heating switch 2086, which are respectively connected to the precharge switch drive The sub-circuit 1062 , the slow charging switch driving sub-circuit 1064 and the heating switch driving sub-circuit 1066 . Of course, in actual scenarios, the switch to be controlled is not limited to the above-mentioned one, but includes but is not limited to at least one of a pre-charge switch, a slow charge switch, a heating switch, a main negative switch, a main positive switch and a fast charge switch , but also any other switch in the high voltage circuit.

In FIG. 3 , the first ends of the pre-charging switch driving subcircuit 1062 , the slow charging switch driving subcircuit 1064 and the heating switch driving subcircuit 1066 are all connected to the signal output port 1022 of the controller 102 .

In actual scenarios, the first ends of the pre-charge switch driving sub-circuit 1062, the slow-charge switch driving sub-circuit 1064, and the heating switch driving sub-circuit 1066 can also be connected to the pre-charge signal output port and the slow-charge signal output port of the controller, respectively. port and heating signal output port. This implementation will be described in detail below in conjunction with the specific circuits in FIG. 4 and FIG. 5 .

As shown in Figure 4, the circuit of the high voltage detection circuit includes a controller 102, the controller 102 and the current detection sub-circuit 104, the pre-charging switch driving sub-circuit 1062, the slow charging switch driving sub-circuit 1064 and the heating switch driving sub-circuit 1066 connected, not only used to control the current detection sub-circuit 104 to detect the current signal inside the main negative switch 204 in the high voltage circuit of the battery, but also used to control the pre-charge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064 and the heating The switch driving sub-circuit 1066 drives the corresponding pre-charging switch 2082 , slow-charging switch 2084 and heating switch 2086 to switch on and off.

Wherein, each switch driving subcircuit can be a switch driver, the first end of the switch driver is connected to the signal output port, and the second end of the switch driver is connected to the switch to be controlled. Certainly, the switch driving subcircuit 106 includes but is not limited to a switch The driver can also be any other device that can perform switch actuation.

Thus, the first ends of the pre-charging switch driving sub-circuit 1062, the slow-charging switch driving sub-circuit 1064 and the heating switch driving sub-circuit 1066 are respectively connected to the pre-charging signal output port 10222, the slow charging signal output port 10224 and the controller 102. The heating signal output port 10226, the second terminals of the pre-charging switch driving sub-circuit 1062, the slow-charging switch driving sub-circuit 1064 and the heating switch driving sub-circuit 1066 are respectively connected to the pre-charging switch 2082, the slow charging switch 2084 and the heating switch 2086.

As shown in Figure 5, the circuit of the high-voltage detection circuit includes a pre-charging circuit, a slow charging circuit and a heating circuit. and heating circuit c, while the pre-charge switch 2082, slow-charge switch 2084 and heating switch 2086 are respectively connected to the pre-charge switch driving sub-circuit 1062, slow-charging switch driving sub-circuit 1064 and heating switch driving sub-circuit 1066.

The pre-charging circuit a, the slow charging circuit b and the heating circuit c are also provided with an anti-reverse connection unit a1, an anti-reverse connection unit b1 and an anti-reverse connection unit c1, wherein the anti-reverse connection unit a1, the anti-reverse connection unit b1 and The anti-reverse connection unit c1 includes but is not limited to diodes, which may not conduct in the case of reverse connection of the pre-charging circuit a, slow-charging circuit b and heating circuit c, so as to ensure the safety of the circuit and even the entire battery.

In addition, the pre-charging circuit a is also provided with a pre-charging resistor a2, and the pre-charging resistor a2 is a single resistor or a resistor array, which is used to limit the current of the pre-charging circuit.

The high voltage detection circuit also includes an isolation strip 108 , a communication component 110 and a power supply component 112 .

Wherein, the isolation strip 108 is arranged at the edge area where the battery high-voltage circuit and the battery low-voltage circuit are connected, and is used to separate the battery high-voltage circuit and the battery low-voltage circuit to improve the safety of the battery.

The controller 102 also has a communication signal transceiving port 1026, the communication component 110 is arranged at the position of the isolation zone 108, the first end of the communication component 110 is connected to the communication signal transceiving port 1026, and the second end of the communication component 110 is connected to the external device. The overall control system is used for communicating with the overall control system of the peripheral device. The communication interaction includes but is not limited to the detection result of the current detection sub-circuit 104 and the on-off state of the switch to be controlled. Wherein, the general control system of the peripheral device includes but not limited to the battery management system, the overall management system of the vehicle and the mobile terminal, and the communication component 110 includes but not limited to the isolation chip.

The controller 102 also has a power receiving port 1028 , and the power supply component 112 is arranged at the position of the isolation strip 108 and connected to the power receiving port 1028 of the controller 102 for supplying power to the controller 102 .

FIG. 6 shows a schematic diagram of the interactive circuit between the high voltage detection circuit 100 and the battery module 202 in FIG. 5 . The working principles of the pre-charging circuit a, the slow charging circuit b and the heating circuit c will be described below in conjunction with FIG. 5 and FIG. 6 .

In an implementation of the present utility model, the pre-charge switch 2082 in the pre-charge circuit a is a MOS tube (MetalOxide Semiconductor, metal-oxide-semiconductor field effect transistor), replacing the pre-charge relay used in the related art, which can Simplify the circuit and reduce the cost. The controller 102 can control the on-off of the pre-charging switch 2082. When the battery module 202 is working normally, first close the main negative switch 204, and then close the pre-charging switch 2082 to charge the capacitive load. After a period of time, turn off the pre-charging switch 2082, close the main positive switch 210, and discharge the load capacitor. In this way, the surge current and peak voltage generated when the battery module 202 supplies power instantaneously can effectively prevent the negative impact on the internal circuit.

In one implementation of the utility model, for the slow charging circuit b, the slow charging switch 2084 is a MOS tube, replacing the slow charging relay used in the related art, which can simplify the circuit and reduce the cost. The slow charging switch 2084 is controlled by the controller 102 to turn on and off. When the slow charging mode is adopted, the slow charging switch 2084 is turned on, and the fast charging switch 210 is turned off. When the fast charging mode is adopted, the slow charging switch 2084 is turned off, and the fast charging The charging switch 216 is turned on. In this way, the slow charging function requirements of the car can be met.

In one implementation of the present invention, for the heating circuit, the heating switch is controlled by the controller 102 to achieve the purpose of controlling the heating of the battery module 202, so that the battery module can be heated by heating the battery module when the external environment temperature is too low. group 202 to increase the power supply capacity of the battery. At the same time, the heating switch can be a MOS tube, replacing the heating relay used in the related art can simplify the circuit and reduce the cost.

4 to 6, the current detection sub-circuit 104 includes a current detection component 1042, the first end 1042a of the current detection component 1042 is connected to the inner side of the main negative switch 204, and the second end 1042b of the current detection component 1042 is connected to the battery module. The negative pole of the group 202 is connected, and the third terminal 1042c and the fourth terminal 1042d of the current detection component 1042 are both connected to the controller 102 . Wherein, the current detection component 1042 includes but is not limited to a shunt, and can also be any other device or circuit capable of current detection. When the current detection component 1042 is a shunt, the shunt has a built-in resistor 1042e, and the first end of the shunt It is connected to the inner side of the main negative switch 204 , the second end of the shunt is connected to the negative pole of the battery module 202 , and both ends of the built-in resistor 1042 e of the shunt are connected to the controller 102 .

When the main positive switch 210 and the main negative switch 204 are closed, the controller 102 collects the potential difference U ₁ -U ₂ at both ends of the built-in resistor through the shunt, and divides the difference between U ₁ -U ₂ by the resistance value R ₀ of the built-in resistor to calculate The current of the battery module 202 is obtained to realize the detection of the current.

In one implementation of the present invention, the current detection sub-circuit 104 also includes a first temperature sensing component 1044 (not shown in the drawings), which is arranged outside the shunt and in contact with the built-in resistance of the shunt, connected to to the controller 102. Wherein, the first temperature sensing component 1044 is a negative temperature coefficient thermistor, that is, the resistance of the first temperature sensing component 1044 decreases as the temperature increases, so that the controller 102 can collect the change value of the resistance of the first temperature sensing component 1044 , and determine the temperature change value according to the change value, that is, the temperature change can be detected when the temperature in the circuit rises, so as to facilitate further control of the current of the battery module 202, for example, it can be disconnected when the temperature is too high The high voltage circuit may reduce the current of the battery module 202 . It needs to be known that the focus of the present invention is to simultaneously control the current detection sub-circuit 104 and the switch drive sub-circuit 106 through the controller 102 of the current detection sub-circuit 104, and the method of current detection and the control of the current by the controller 102 are not done. It is limited, that is to say, the present invention can use any method to detect the current of the battery module 202 and control accordingly.

As shown in FIG. 6 , the heating circuit is also connected with a second temperature sensing component 1046, which is a positive temperature coefficient thermistor and is used to detect the temperature of the battery module 202. decrease, so as to increase the passing current and generate heat dissipation. In this way, the controller 102 can determine the temperature of the battery module 202 according to the resistance of the second temperature sensing component 1046, so that when the temperature of the battery module 202 is lower than the predetermined normal When the working temperature is reached, the heating switch can be closed, the heating circuit can be started, and the battery module 202 can be heated through the heat dissipation of the second temperature sensing component 1046 .

The battery module 202 is also connected with an electric device 212, and the electric device 212 is connected with a load, which can realize the discharge of the battery module 202. The battery module 202 is also connected with a main positive switch 210 and a main negative switch 204, the main positive switch and the main negative switch. The switch is used for overload protection of electric devices.

The battery module 202 is also connected with a charging device 214. The charging device 214 includes an AC charging device 2142 and a DC charging device 2144. The charging device 214 is connected to the fast charging switch 216 and the slow charging circuit b, so as to realize the charging of the battery module 202. Charge.

In addition, there are other unlabeled switches in the circuit shown in FIG. 6 , which are conventional parts of the high-voltage circuit of the battery, and will not be repeated here.

Fig. 7 shows a block diagram of a circuit board of an embodiment of the present invention.

As shown in Figure 7, the circuit board 700 of an embodiment of the present invention includes the high voltage detection circuit 100 shown in any embodiment in Figures 1 to 6, therefore, the circuit board 700 has the same The technical effect of the high voltage detection circuit 100 shown in any embodiment is the same, and will not be repeated here.

Fig. 8 shows a block diagram of a detector of an embodiment of the present invention.

As shown in Figure 8, the detector 800 of an embodiment of the present invention includes the high voltage detection circuit 100 shown in any one of the embodiments in Figure 1 to Figure 6, therefore, the detector 800 has the same The technical effect of the high voltage detection circuit 100 shown in any embodiment is the same, and will not be repeated here.

FIG. 9 shows a block diagram of a battery device according to an embodiment of the present invention.

As shown in FIG. 9, a battery device 900 according to an embodiment of the present invention includes the high-voltage detection circuit 100 shown in any embodiment in FIGS. 1 to 6. Therefore, the battery device 900 has the same The technical effect of the high voltage detection circuit 100 shown in any embodiment is the same, and will not be repeated here.

Figure 10 shows a block diagram of a vehicle of one embodiment of the present invention.

As shown in FIG. 10 , a vehicle 1000 according to an embodiment of the present invention includes the high-voltage detection circuit 100 shown in any one of the embodiments in FIGS. 1 to 6 . Therefore, the vehicle 1000 has the same The technical effect of the high voltage detection circuit 100 shown in any embodiment is the same, and will not be repeated here. Wherein, the vehicle 1000 includes, but is not limited to, an electric vehicle and a hybrid vehicle.

The technical solution of the utility model has been described in detail above in conjunction with the accompanying drawings. The technical solution of the utility model not only saves the cost of the wires consumed by the isolation unit and the long-distance connection, but also improves the safety of the circuit, and at least shortens the length of the switch. The transmission distance of the control signal not only reduces the energy loss of the switch control signal during transmission, makes the control of the control switch more accurate, but also improves the transmission speed of the switch control signal, thereby improving the performance of the battery as a whole.

It should be understood that the term "and/or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrases "if determined" or "if detected (the stated condition or event)" could be interpreted as "when determined" or "in response to the determination" or "when detected (the stated condition or event) )" or "in response to detection of (a stated condition or event)".

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.

Claims (14)

1. A high-voltage detection circuit, characterized in that, comprising: The controller has a signal receiving port and a signal output port; A current detection subcircuit, the first end of the current detection subcircuit is connected to the signal receiving port of the controller, and the second end of the current detection subcircuit is connected to the inner side of the main negative switch in the high voltage circuit of the battery ; A switch driving subcircuit, the first end of the switch driving subcircuit is connected to the signal output port of the controller, and the second end of the switch driving subcircuit is connected to the switch to be controlled in the battery high voltage circuit . 2. The high voltage detection circuit according to claim 1, further comprising: The switch to be controlled is connected to the switch driving sub-circuit for collecting the switch driving signal and adjusting the on-off state according to the switch driving signal. 3. The high voltage detection circuit according to claim 2, characterized in that, The switch to be controlled includes at least one of a pre-charging switch, a slow charging switch, a heating switch, a main negative switch, a main positive switch and a fast charging switch. 4. The high voltage detection circuit according to claim 3, characterized in that, The switch to be controlled includes a relay and/or a MOS tube. 5. The high voltage detection circuit according to claim 2, characterized in that, The number of the switch driving sub-circuits, the number of the signal output ports and the number of the switches to be controlled are all one or more; The first end of each switch driving subcircuit is used to collect the switch control signal through the signal output port, and the second end of each switch driving subcircuit is used to transmit the switch driving signal to the To be controlled switch. 6. The high voltage detection circuit according to any one of claims 1 to 5, wherein the switch driving sub-circuit comprises: A switch driver, the first end of the switch driver is connected to the signal output port, and the second end of the switch driver is connected to the switch to be controlled. 7. The high-voltage detection circuit according to any one of claims 1 to 5, wherein the current detection sub-circuit comprises: A current detection component, the first terminal of the current detection component is connected to the negative pole of the battery module, the second terminal of the current detection component is connected to the inner side of the main negative switch, and the third terminal of the current detection component is connected to the negative pole of the battery module. The fourth ends are all connected to the controller. 8. The high voltage detection circuit according to claim 7, wherein the current detection component comprises: A shunt, the shunt has a built-in resistor, the first end of the shunt is connected to the negative pole of the battery module, the second end of the shunt is connected to the inner side of the main negative switch, and the shunt Both ends of the built-in resistor of the tor are connected to the controller. 9. The high voltage detection circuit according to claim 1, further comprising: The isolation strip is arranged on the edge area where the battery high-voltage circuit and the battery low-voltage circuit are connected; The controller also has a communication signal transceiver port, and correspondingly, the high voltage detection circuit also includes: The communication component is arranged at the position of the isolation zone, the first end of the communication component is connected to the communication signal transceiving port of the controller, and the second end of the communication component is connected to the general control of the peripheral system. 10. The high voltage detection circuit according to claim 9, wherein the communication component is an isolation chip. 11. The high voltage detection circuit according to claim 9, wherein the controller also has a power receiving port, and correspondingly, the high voltage detection circuit further comprises: A power supply component is arranged at the position of the isolation zone and connected to the power receiving port of the controller. 12. A detector, characterized by comprising the high voltage detection circuit according to any one of claims 1 to 11. 13. A battery device, characterized by comprising the high voltage detection circuit according to any one of claims 1 to 11. 14. A vehicle, characterized by comprising the high voltage detection circuit according to any one of claims 1 to 11.