CN107621565B - High voltage detection circuit, detector, battery device and vehicle - Google Patents
High voltage detection circuit, detector, battery device and vehicle Download PDFInfo
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- CN107621565B CN107621565B CN201710994718.0A CN201710994718A CN107621565B CN 107621565 B CN107621565 B CN 107621565B CN 201710994718 A CN201710994718 A CN 201710994718A CN 107621565 B CN107621565 B CN 107621565B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention provides a high-voltage detection circuit, a detector, a battery device and a carrier, wherein the high-voltage detection circuit comprises: a controller having a signal receiving port and a signal outputting port; the current detection sub-circuit is used for collecting current signals inside a main negative switch in a battery high-voltage loop and transmitting the current signals to the signal receiving port; and the switch driving sub-circuit is used for collecting the switch control signals through the signal output port and generating corresponding switch driving signals according to the switch control signals. By adopting the technical scheme of the invention, the cost of the isolation unit and the wire consumed by long-distance connection is saved, the safety of the circuit is improved, the transmission distance of the switch control signal is at least shortened, the energy loss of the switch control signal in the transmission process is reduced, the control of the switch to be controlled is more accurate, and the transmission speed of the switch control signal is improved.
Description
[ field of technology ]
The invention relates to the technical field of batteries, in particular to a high-voltage detection circuit, a detector, a battery device and a carrier.
[ background Art ]
At present, the electric automobile has become a trend of development of the automobile industry instead of the fuel automobile, and the safety problem of the vehicle-mounted battery has become one of the problems of obstructing popularization of the electric automobile. Currently, in order to reduce the safety risk of the high-voltage circuit of the vehicle-mounted battery in operation, the state of each relay in the high-voltage circuit needs to be controlled so as to control the opening or closing of the relevant relay in the high-voltage circuit in the case of operation needs or unsafe factors are detected.
In the related art, the circuits of the relays in the high-voltage circuit of the vehicle battery are all separately arranged and are all connected to the battery management unit (Battery Management Unit, BMU) of the low-voltage part of the vehicle battery, and the control is performed by the battery management unit, so that a wire harness is required to connect the low-voltage part and the high-voltage circuit.
In order to ensure that the low-voltage part and the high-voltage loop can work normally, an isolation unit is required to isolate the low-voltage part from the high-voltage loop, however, the circuit design is complex and easy to make mistakes, and meanwhile, the cost for arranging the isolation unit is high.
Therefore, at least the internal circuit structure of the vehicle-mounted battery is too complicated in the related art.
[ invention ]
The embodiment of the invention provides a high-voltage detection circuit, a detector, a battery device and a carrier, and aims to solve the technical problem that the internal circuit structure of a vehicle-mounted battery in the related art is too complex, simplify the internal circuit structure of the vehicle-mounted battery and reduce the cost of the vehicle-mounted battery.
In a first aspect, an embodiment of the present invention provides a high voltage detection circuit, including: a controller having a signal receiving port and a signal outputting port; the current detection sub-circuit is used for collecting current signals inside a main negative switch in a battery high-voltage loop and transmitting the current signals to the signal receiving port; and the switch driving sub-circuit is used for collecting the switch control signals through the signal output port and generating corresponding switch driving signals according to the switch control signals.
In the above embodiment of the present invention, optionally, the method further includes: and the switch to be controlled is connected to the switch driving sub-circuit and is used for collecting the switch driving signal and adjusting the opening and closing state according to the switch driving signal.
In the above embodiment of the present invention, optionally, the method further includes: the switch to be controlled comprises 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 embodiment of the present invention, optionally, the switch to be controlled includes a relay and/or a MOS transistor.
In the above embodiment 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 one or more; the first end of each switch driving sub-circuit is used for collecting the switch control signals through the signal output port, and the second end of each switch driving sub-circuit is used for transmitting the switch driving signals to the switch to be controlled.
In the above embodiment of the present invention, optionally, the switch driving sub-circuit includes: and 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 embodiment of the present invention, optionally, the current detection sub-circuit includes: the first end of the current detection component is connected with the negative electrode of the battery module, the second end of the current detection component is connected with the inner side of the main negative switch, and the third end and the fourth end of the current detection component are connected to the controller.
In the above embodiment of the present invention, optionally, the current detection assembly includes: the current divider is provided with a built-in resistor, a first end of the current divider is connected with the negative electrode of the battery module, a second end of the current divider is connected with the inner side of the main negative switch, and two ends of the built-in resistor of the current divider are connected to the controller.
In the above embodiment of the present invention, optionally, the current detection sub-circuit further includes: the first temperature sensing assembly is arranged at the outer side of the shunt and is connected with the controller at a position where the first temperature sensing assembly contacts with the built-in resistor of the shunt.
In the above embodiment of the present invention, optionally, the first temperature sensing component is a negative temperature coefficient thermistor.
In the above embodiment of the present invention, optionally, the method further includes: the isolation belt is arranged in the edge area where the battery high-voltage loop and the battery low-voltage loop are connected; the controller also has a communication signal receiving and transmitting port, and correspondingly, the high voltage detection circuit also comprises: and the communication assembly is arranged at the position of the isolation belt, the first end of the communication assembly is connected to the communication signal receiving and transmitting port of the controller, and the second end of the communication assembly is connected to a peripheral total control system.
In the foregoing embodiment of the present invention, optionally, the communication component is an isolated chip.
In the above embodiment of the present invention, optionally, the controller further has a power receiving port, and correspondingly, the high voltage detection circuit further includes: and a power supply assembly disposed at a position of the isolation belt and connected to the power receiving port of the controller.
In a second aspect, an embodiment of the present invention provides a high voltage detection circuit, including: a controller having a signal receiving port and a signal outputting port; a current detection sub-circuit, a first end of which is connected to the signal receiving port of the controller, and a second end of which is connected to the inner side of a main negative switch in the battery high-voltage loop; and a switch driving sub-circuit, wherein a first end of the switch driving sub-circuit is connected to the signal output port of the controller, and a second end of the switch driving sub-circuit is connected to a switch to be controlled in the battery high-voltage loop.
In a third aspect, an embodiment of the present invention provides a detector, including a high voltage detection circuit as in any one of the above embodiments.
In a fourth aspect, an embodiment of the present invention provides a battery device, including the high voltage detection circuit according to any one of the above embodiments.
In a fifth aspect, an embodiment of the present invention provides a vehicle, including the high voltage detection circuit of any one of the above embodiments.
In addition, an embodiment of the present invention provides a circuit board for integrating a battery high-voltage circuit or a detection circuit of the battery high-voltage circuit, including the high-voltage detection circuit according to any one of the above embodiments.
According to the technical scheme, aiming at the technical problem that the internal circuit structure of the vehicle-mounted battery in the related technology is too complex, the mutually independent current detection subcircuit and each switch driving subcircuit in the battery high-voltage loop are integrated together, the current detection subcircuit and each switch driving subcircuit are connected to a controller originally used for controlling the current detection subcircuit, the original BMU connection mode is replaced by the mode of connecting the controller, the controller can control and detect the current signal inside a main negative switch in the battery high-voltage loop, and can also send a switch control signal to the switch driving subcircuit, so that the switch driving subcircuit drives a switch to be controlled to be opened or closed according to the switch control signal.
Therefore, each switch driving sub-circuit is not required to be connected with the BMU of the low-voltage part, and therefore an isolation unit in the related technology is not required to be arranged to isolate the high-voltage loop from the low-voltage part, the cost of wires consumed by the isolation unit and long-distance connection is saved, and the safety of the circuit is improved. Meanwhile, on the basis, the transmission distance of the switch control signal is at least shortened, so that the energy loss of the switch control signal in the transmission process is reduced, the control of the switch to be controlled is more accurate, the transmission speed of the switch control signal is improved, and the performance of the battery is integrally improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows an overall schematic of a high voltage detection circuit of one embodiment of the present invention;
FIG. 2 shows a schematic diagram of a high voltage detection circuit according to another embodiment of the present invention;
FIG. 3 shows a schematic diagram of a high voltage detection circuit of yet another embodiment of the present invention;
FIG. 4 shows a circuit schematic of a high voltage detection circuit of one embodiment of the invention;
FIG. 5 shows a circuit schematic of a high voltage detection circuit according to another embodiment of the present invention;
FIG. 6 is a schematic diagram showing the interaction between the circuit of the high voltage detection circuit of FIG. 5 and the battery module;
FIG. 7 shows a block diagram of a circuit board of one embodiment of the invention;
FIG. 8 shows a block diagram of a detector of one embodiment of the invention;
fig. 9 shows a block diagram of a battery device of an embodiment of the invention;
FIG. 10 shows a block diagram of a vehicle of one embodiment of the invention.
[ detailed description ] of the invention
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 shows an overall schematic diagram of a high voltage detection circuit of an embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a high voltage detection circuit 100, including: a controller 102, a current sense subcircuit 104, and a switch drive subcircuit 106. The controller 102 has a signal receiving port 1024 and a signal output port 1022, a first end of the current detection subcircuit 104 is connected to the signal receiving port 1024 of the controller 102, a second end of the current detection subcircuit 104 is connected to the inside of the main negative switch 204 in the battery high voltage loop, a first end of the switch drive subcircuit 106 is connected to the signal output port 1022 of the controller 102, and a second end of the switch drive subcircuit 106 is connected to the switch 208 to be controlled in the battery high voltage loop.
One end of the switch near the battery module 202 is referred to as the inside of the switch, and the other end is referred to as the outside of the switch, where the inside of the main negative switch 204 refers to the end of the main negative switch 204 near the battery module 202. In addition, other part circuits 206 are also provided in the battery high-voltage circuit, and the specific structure of the other part circuits 206 is not shown in the figure.
The current detection sub-circuit 104 is configured to collect a 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 configured to receive the current signal through the signal receiving port 1024, and since the inside of the main negative switch 204 is connected to the negative electrode of the battery module 202, the controller 102 can determine whether the battery module 202 is in a normal working state according to the range of the current signal.
The switch driving sub-circuit 106 is configured to collect a switch control signal through the signal output port 1022, generate a corresponding switch driving signal according to the switch control signal, and send the switch driving signal to the switch 208 to be controlled, so as to drive the switch 208 to be controlled to be turned on or turned off. For example, when the switch 208 to be controlled is a slow charge switch, the controller 102 controls the switch driving sub-circuit 106 to control the on-off of the slow charge switch, so that the slow charge function requirement of the battery can be met.
In summary, the current detection sub-circuit 104 and each switch driving sub-circuit 106 that are independent of each other in the battery high voltage loop are integrated together, the current detection sub-circuit 104 and each switch driving sub-circuit 106 are connected to the controller 102 that is originally used for controlling the current detection sub-circuit 104, the original mode of connecting the BMU is replaced by the mode of connecting the controller 102, the controller 102 can control and detect the current signal inside the main negative switch 204 in the battery high voltage loop, and can also send a switch control signal to the switch driving sub-circuit 106, so that the switch driving sub-circuit 106 drives the switch 208 to be controlled to be opened or closed according to the switch control signal.
In this way, each switch driving sub-circuit 106 does not need to be connected with the BMU of the low voltage part, so that an isolation unit in the related art is not needed to isolate the high voltage loop from the low voltage part, thereby saving the cost of the isolation unit and the wires consumed by long-distance connection and improving the safety of the circuit. Meanwhile, on the basis, the transmission distance of the switch control signal is at least shortened, so that the energy loss of the switch control signal in the transmission process is reduced, the control of the switch 208 to be controlled is more accurate, the transmission speed of the switch control signal is improved, and the performance of the battery is integrally improved.
Fig. 2 shows a schematic diagram of a high voltage detection circuit according to another embodiment of the invention.
As shown in fig. 2, on the basis of the structure shown in fig. 1, the method further comprises: the switch 208 to be controlled is connected to the switch driving sub-circuit 106, and is used for collecting the switch driving signal and adjusting the open/close state according to the switch driving signal.
That is, in the embodiment shown in fig. 1, only the switch drive sub-circuit 106, which is originally controlled by the BMU, is integrated with the current detection sub-circuit 104, which is controlled by the controller 102 controlling the current detection sub-circuit 104, whereas in the embodiment shown in fig. 2, the switch drive sub-circuit 106 and the switch 208 to be controlled, which is driven by the switch drive sub-circuit, are integrated with the current detection sub-circuit 104, which is controlled by the controller 102 controlling the current detection sub-circuit 104.
The number of switch drive subcircuits 106, the number of signal output ports 1022, and the number of switches 208 to be controlled are one or more; a first end of each switch drive sub-circuit 106 is for collecting a switch control signal via a signal output port 1022, and a second end of each switch drive sub-circuit 106 is for transmitting the switch drive signal to the switch 208 to be controlled.
On the basis of this, in one implementation of the present invention, there is one switch driving sub-circuit 106 for each switch 208 to be controlled, and one signal output port 1022 may be individually corresponding to a single switch driving sub-circuit 106. In this way, the control of the to-be-controlled switch 208 to be controlled can be accurately realized by the switch control signals of different to-be-controlled switches 208, the situation that the switch control signals are transmitted to other switches which are not required to be controlled in an error manner is avoided, the accuracy of switch control is improved, and a foundation is provided for protecting the safety of the battery.
In another implementation of the present invention, multiple switch driving sub-circuits 106 may be commonly connected to the same signal output port 1022, and at the same time, multiple switches 208 to be controlled may also be connected to one switch driving sub-circuit 106, so that the number of ports of the controller 102 used may be saved, further simplifying the circuit and reducing the cost.
It is to be added that the switch 208 to be controlled comprises a relay and/or a MOS transistor (Metal Oxide Semiconductor, metal-oxide-semiconductor field effect transistor). The relay and the MOS tube are common in that the relay and the MOS tube can control large current by using small signals, wherein the relay is driven by current, has the advantages of overcurrent resistance and good overheat resistance, can be electrically isolated, namely, has lower environmental requirements, and the MOS tube is driven by voltage, can be in a larger frequency range than the relay, and has lower cost.
Fig. 3 shows a schematic diagram of a high voltage detection circuit according to yet another embodiment of the present invention, in fig. 3, the switch to be controlled includes a precharge switch 2082, a slow charge switch 2084, and a heating switch 2086, which are connected to the precharge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064, and the heating switch drive sub-circuit 1066, respectively. Of course, in a practical scenario, 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 may also be any other switch in the high voltage loop.
In fig. 3, the first terminals of the precharge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064, and the heating switch drive sub-circuit 1066 are all connected to the signal output port 1022 of the controller 102.
In a practical scenario, the first terminals of the precharge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064, and the heating switch drive sub-circuit 1066 may also be connected to the precharge signal output port, the slow charge signal output port, and the heating signal output port of the controller, respectively. Such an implementation is described in detail below in connection with the specific circuits of fig. 4 and 5.
As shown in fig. 4, the circuit of the high voltage detection circuit includes a controller 102, where the controller 102 is connected to the current detection sub-circuit 104, the precharge switch driving sub-circuit 1062, the slow charge switch driving sub-circuit 1064, and the heating switch driving sub-circuit 1066, and is used to control the current detection sub-circuit 104 to detect the current signal inside the main negative switch 204 in the battery high voltage circuit, and also can be used to control the precharge switch driving sub-circuit 1062, the slow charge switch driving sub-circuit 1064, and the heating switch driving sub-circuit 1066 to drive the corresponding precharge switch 2082, slow charge switch 2084, and heating switch 2086 to be opened and closed.
Each of the switch driving sub-circuits may be a switch driver, a first end of the switch driver is connected to the signal output port, and a second end of the switch driver is connected to the switch to be controlled, and of course, the switch driving sub-circuits 106 include, but are not limited to, switch drivers, and any other device capable of performing switch driving may be used.
Thus, first ends of the precharge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064, and the heating switch drive sub-circuit 1066 are connected to the precharge signal output port 10222, the slow charge signal output port 10224, and the heating signal output port 10226 of the controller 102, respectively, and second ends of the precharge switch drive sub-circuit 1062, the slow charge switch drive sub-circuit 1064, and the heating switch drive sub-circuit 1066 are connected to the precharge switch 2082, the slow charge switch 2084, and the heating switch 2086, respectively.
As shown in fig. 5, the circuit of the high voltage detection circuit includes a pre-charge circuit, a slow charge circuit, and a heating circuit, the pre-charge switch 2082, the slow charge switch 2084, and the heating switch 2086 are respectively disposed in the pre-charge circuit a, the slow charge circuit b, and the heating circuit c, and the pre-charge switch driving sub-circuit 1062, the slow charge switch 2084, and the heating switch 2086 are respectively connected to the pre-charge switch driving sub-circuit 1062, the slow charge switch driving sub-circuit 1064, and the heating switch driving sub-circuit 1066.
The pre-charging loop a, the slow charging loop b and the heating loop c are respectively 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 comprise, but are not limited to, diodes, and the pre-charging loop a, the slow charging loop b and the heating loop c can be disconnected under the condition of reverse connection so as to ensure the safety of a circuit and even the whole battery.
In addition, the pre-charging circuit a is further provided with a pre-charging resistor a2, and the pre-charging resistor a2 is a single resistor or a resistor array and is used for limiting the current of the pre-charging circuit.
The high voltage detection circuit also includes an isolation strip 108, a communication assembly 110, and a power supply assembly 112.
The isolation belt 108 is disposed at an edge area where the battery high-voltage circuit and the battery low-voltage circuit are connected, and is used for separating the battery high-voltage circuit and the battery low-voltage circuit and improving the safety of the battery.
The controller 102 further has a communication signal transceiving port 1026, the communication component 110 is disposed at the position of the isolation belt 108, a first end of the communication component 110 is connected to the communication signal transceiving port 1026, and a second end of the communication component 110 is connected to the external overall control system for performing communication interaction with the external overall control system, wherein the communication interaction includes, but is not limited to, a detection result of the current detection sub-circuit 104 and an open/close state of a switch to be controlled. Among other things, the overall control system of the peripheral devices includes, but is not limited to, a battery management system, an overall management system of the vehicle, and a mobile terminal, and the communication component 110 includes, but is not limited to, a separate chip.
The controller 102 also has a power receiving port 1028, and a power supply assembly 112 is provided at the location of the isolation belt 108, 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 an interaction between the circuit of the high voltage detection circuit 100 and the battery module 202 in fig. 5, and the operation principle of the pre-charge circuit a, the slow charge circuit b, and the heating circuit c will be described with reference to fig. 5 and 6.
In one implementation of the present invention, the precharge switch 2082 in the precharge circuit a is a MOS transistor (Metal Oxide Semiconductor, metal-oxide-semiconductor field effect transistor), and replaces the precharge relay used in the related art, so that the circuit can be simplified and the cost can be reduced. The controller 102 can control the on-off state of the pre-charge switch 2082, when the battery module 202 works normally, the main negative switch 204 is closed, the pre-charge switch 2082 is closed again, the capacitive load is charged, after a period of time, the pre-charge switch 2082 is opened, the main positive switch 210 is closed, and the load capacitor is discharged. In this way, the negative influence of the surge current and the peak voltage generated when the battery module 202 supplies power instantaneously on the internal circuit can be effectively prevented.
In one implementation of the present invention, for the slow charge loop b, the slow charge switch 2084 is a MOS transistor, and replaces the slow charge relay used in the related art, so that the circuit can be simplified, and the cost can be reduced. The controller 102 controls the on-off of the slow charge switch 2084, when the slow charge mode is adopted, the slow charge switch 2084 is turned on, the fast charge switch 210 is turned off, and when the fast charge mode is adopted, the slow charge switch 2084 is turned off, and the fast charge switch 216 is turned on. In this way, the slow-filling function requirement of the automobile can be met.
In one implementation of the present invention, for the heating circuit, the controller 102 controls the on/off of the heating switch, so as to control the heating of the battery module 202, so as to improve the power supply capability of the battery by heating the battery module 202 under the condition of low external environment temperature. Meanwhile, the heating switch can be an MOS tube, and a heating relay used in the related technology is replaced, so that a circuit can be simplified, and the cost is reduced.
As shown in fig. 4 to 6, the current detection sub-circuit 104 includes a current detection component 1042, a first end 1042a of the current detection component 1042 is connected to the inner side of the main negative switch 204, a second end 1042b of the current detection component 1042 is connected to the negative electrode of the battery module 202, and a third end 1042c and a fourth end 1042d of the current detection component 1042 are connected to the controller 102. The current detecting component 1042 includes, but is not limited to, a current divider, and any other device or circuit capable of detecting a current, where the current detecting component 1042 is a current divider, the current divider has a built-in resistor 1042e, a first end of the current divider is connected to an inner side of the main negative switch 204, a second end of the current divider is connected to a negative electrode of the battery module 202, and two ends of the built-in resistor 1042e of the current divider 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 across the built-in resistor through the shunt 1 -U 2 And pass through U 1 -U 2 Dividing the difference value of the built-in resistor by the resistance value R 0 The current of the battery module 202 is calculated, and detection of the current is achieved.
In one implementation of the present invention, the current detection subcircuit 104 further includes a first temperature sensing component 1044 (not shown in the figures) disposed outside of the shunt and in contact with the built-in resistor of the shunt, connected to the controller 102. The first temperature sensing component 1044 is a negative temperature coefficient thermistor, that is, the resistance of the first temperature sensing component 1044 decreases with the increase of temperature, 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, can detect the temperature change when the temperature in the circuit increases, so as to further control the current of the battery module 202, for example, can break the high voltage circuit or reduce the current of the battery module 202 when the temperature is too high. It should be understood that the present invention focuses on that the controller 102 of the current detection sub-circuit 104 controls the current detection sub-circuit 104 and the switch driving sub-circuit 106 simultaneously, and the current detection mode and the control of the current by the controller 102 are not limited, that is, the present invention can perform the current detection and the corresponding control of the battery module 202 in any manner.
As shown in fig. 6, the heating circuit is further connected to a second temperature sensing component 1046, where the second temperature sensing component 1046 is a positive temperature coefficient thermistor and is used for detecting the temperature of the battery module 202, and decreasing with decreasing temperature of the battery module 202, so as to increase the passing current and generate heat dissipation, so that the controller 102 can determine the temperature of the battery module 202 according to the resistance of the second temperature sensing component 1046, and when the temperature of the battery module 202 is lower than the predetermined normal working temperature, the heating switch can be closed, the heating circuit is started, and the heating of the battery module 202 is realized through heat dissipation of the second temperature sensing component 1046.
The battery module 202 is also connected with an electric device 212, the electric device 212 is connected with a load, the discharging of the battery module 202 can be realized, the battery module 202 is also connected with a main positive switch 210 and a main negative switch 204, and the main positive switch and the main negative switch are used for overload protection of the electric device.
The battery module 202 is further connected with a charging device 214, the charging device 214 includes an ac charging device 2142 and a dc charging device 2144, and the charging device 214 is connected with the fast charging switch 216 and the slow charging circuit b for charging the battery module 202.
In addition, the circuit shown in fig. 6 also has other switches, which are not labeled, and are conventional parts of the high-voltage circuit of the battery, and are not described herein.
Fig. 7 shows a block diagram of a circuit board of one embodiment of the invention.
As shown in fig. 7, the circuit board 700 according to an embodiment of the present invention includes the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and therefore, the circuit board 700 has the same technical effects as the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and will not be repeated herein.
Fig. 8 shows a block diagram of a detector of an embodiment of the invention.
As shown in fig. 8, the detector 800 according to an embodiment of the present invention includes the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and therefore, the detector 800 has the same technical effects as the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and is not described herein.
Fig. 9 shows a block diagram of a battery device of an embodiment of the invention.
As shown in fig. 9, the battery device 900 according to an embodiment of the present invention includes the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and therefore, the battery device 900 has the same technical effects as the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and will not be described herein.
FIG. 10 shows a block diagram of a vehicle of one embodiment of the invention.
As shown in fig. 10, the vehicle 1000 according to an embodiment of the present invention includes the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and therefore, the vehicle 1000 has the same technical effects as the high voltage detection circuit 100 shown in any one of fig. 1 to 6, and will not be described herein. Among them, the vehicles 1000 include, but are not limited to, electric vehicles and hybrid vehicles.
The technical scheme of the invention is explained in detail by combining the drawings, through the technical scheme of the invention, the cost of the isolation unit and the wire consumed by long-distance connection is saved, the safety of a circuit is improved, the transmission distance of the switch control signal is at least shortened, the energy loss of the switch control signal in the transmission process is reduced, the control of the switch to be controlled is more accurate, the transmission speed of the switch control signal is improved, and the performance of the battery is integrally improved.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Depending on the context, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to detection". Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (14)
1. A high voltage detection circuit, comprising:
a controller having a signal receiving port and a signal outputting port;
the current detection sub-circuit is used for collecting current signals inside a main negative switch in a battery high-voltage loop and transmitting the current signals to the signal receiving port;
and the switch driving sub-circuit is used for collecting a switch control signal through the signal output port and generating a corresponding switch driving signal according to the switch control signal, wherein the switch driving signal is used for adjusting the opening and closing state of the switch to be controlled.
2. The high voltage detection circuit of claim 1, further comprising:
the switch to be controlled is connected to the switch driving sub-circuit and is used for collecting the switch driving signal and adjusting the opening and closing state according to the switch driving signal.
3. The high voltage detection circuit according to claim 2, wherein,
the switch to be controlled comprises 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, wherein,
the switch to be controlled comprises a relay and/or an MOS tube.
5. The high voltage detection circuit according to claim 2, wherein,
the number of the switch driving subcircuits, the number of the signal output ports and the number of the switches to be controlled are one or more;
the first end of each switch driving sub-circuit is used for collecting the switch control signals through the signal output port, and the second end of each switch driving sub-circuit is used for transmitting the switch driving signals to the switch to be controlled.
6. The high voltage detection circuit according to any one of claims 1 to 5, wherein the switch driving sub-circuit includes:
and 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 includes:
the first end of the current detection component is connected with the negative electrode of the battery module, the second end of the current detection component is connected with the inner side of the main negative switch, and the third end and the fourth end of the current detection component are connected to the controller.
8. The high voltage detection circuit of claim 7, wherein the current detection assembly comprises:
the current divider is provided with a built-in resistor, a first end of the current divider is connected with the negative electrode of the battery module, a second end of the current divider is connected with the inner side of the main negative switch, and two ends of the built-in resistor of the current divider are connected to the controller.
9. The high voltage detection circuit of claim 1, further comprising:
the isolation belt is arranged in the edge area where the battery high-voltage loop and the battery low-voltage loop are connected;
the controller also has a communication signal receiving and transmitting port, and correspondingly, the high voltage detection circuit also comprises:
and the communication assembly is arranged at the position of the isolation belt, the first end of the communication assembly is connected to the communication signal receiving and transmitting port of the controller, and the second end of the communication assembly is connected to a peripheral total control system.
10. The high voltage detection circuit of claim 9, wherein the communication component is an isolated chip.
11. The high voltage detection circuit of claim 9, wherein the controller further has a power receiving port, and wherein the high voltage detection circuit further comprises:
and a power supply assembly disposed at a position of the isolation belt and connected to the power receiving port of the controller.
12. A detector comprising a high voltage detection circuit as claimed in any one of claims 1 to 11.
13. A battery device comprising the high voltage detection circuit according to any one of claims 1 to 11.
14. A vehicle comprising a high voltage detection circuit according to any one of claims 1 to 11.
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