CN212861167U - Interface circuit, distribution box, charging management system and vehicle - Google Patents
Interface circuit, distribution box, charging management system and vehicle Download PDFInfo
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- CN212861167U CN212861167U CN202021037965.5U CN202021037965U CN212861167U CN 212861167 U CN212861167 U CN 212861167U CN 202021037965 U CN202021037965 U CN 202021037965U CN 212861167 U CN212861167 U CN 212861167U
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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 utility model provides an interface circuit, block terminal, charge management system and vehicle, interface circuit includes: the voltage division detection module and the first relay; the first end of the partial pressure detection module is connected with the anode of the power battery through the first relay, and the second end of the partial pressure detection module is connected with the cathode of the power battery; the voltage division detection module comprises a plurality of voltage division resistors connected in series and a voltage division detector; the voltage division detector is connected in parallel with at least one of the plurality of series-connected voltage division resistors, and is used for monitoring voltage values at two ends of the at least one voltage division resistor. The utility model discloses interface circuit has not only reduced the quantity of relay, makes interface circuit's cost reduce by a wide margin, has still reduced interface circuit's complexity, and then makes the fault diagnosis logic of first relay simpler, and fault diagnosis and location are accurate more fast.
Description
Technical Field
The utility model relates to the field of automotive technology, in particular to interface circuit, block terminal, charging management system and vehicle.
Background
With the development of the automobile industry, electric vehicles are widely popularized and applied due to their excellent energy-saving and environment-friendly properties. In order to increase the charging speed of the electric vehicle, the electric vehicle can be subjected to direct current quick charging. When carrying out direct current quick charge to electric vehicle, set up interface protection circuit in the block terminal of vehicle usually to utilize the relay to realize breaking off before charging and keeping apart, switch on direct current when charging and fill functions such as electric pile.
In the prior art, a relay is usually provided in the interface protection circuit to connect the positive pole and the negative pole of the vehicle power battery. In order to prevent the unexpected closing, adhesion or disconnection of the two relays in the interface protection circuit, the states of the two relays need to be detected before the direct-current charging. Thus, a detection circuit for the state of the relay needs to be additionally provided. This results in a protection circuit for the entire interface, which not only has a large number of electric devices and high cost, but also has a complex design, and thus has a complex logic for fault diagnosis and is difficult to determine and locate.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an interface circuit, block terminal, charge management system and vehicle to solve among the prior art many, the with high costs of electrical part in the interface circuit, and the problem that interface circuit design is complicated, failure diagnosis is difficult.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
an interface circuit applied to a vehicle including a power battery, the interface circuit comprising: the voltage division detection module and the first relay;
the first end of the partial pressure detection module is connected with the anode of the power battery through the first relay, and the second end of the partial pressure detection module is connected with the cathode of the power battery;
the voltage division detection module comprises a plurality of voltage division resistors connected in series and a voltage division detector;
the voltage division detector is connected in parallel with at least one of the plurality of series-connected voltage division resistors, and is used for monitoring voltage values at two ends of the at least one voltage division resistor.
Further, the resistance values of the voltage dividing resistors are the same or different.
Further, the interface circuit further includes: a second relay;
one end of the first relay is connected with the first end of the partial pressure detection module, and the other end of the first relay is connected with the anode of the power battery through the second relay.
Further, the interface circuit further includes: a third relay;
and the second end of the partial pressure detection module is connected with the negative electrode of the power battery through the third relay.
Further, the interface circuit further includes: a capacitor;
one end of the capacitor is connected between the first relay and the second relay, and the other end of the capacitor is connected between the other end of the voltage division detection module and the third relay.
Further, the interface circuit further includes: a fourth relay and a pre-charging resistor;
one end of the fourth relay is connected with the pre-charging resistor, and the other end of the fourth relay is connected with one end of the second relay;
and the other end of the pre-charging resistor is connected with the other end of the second relay.
Compared with the prior art, interface circuit have following advantage:
in the embodiment of the application, because the first end of partial pressure detection module is passed through first relay with power battery's positive pole links to each other, partial pressure detection module's second end with power battery's negative pole links to each other, the partial pressure detector with at least one in the resistance of a plurality of series connection the divider resistance is parallelly connected, the partial pressure detector is used for, monitors the voltage at least one divider resistance both ends, consequently, give through above-mentioned interface circuit during power battery charges, not only opening or closing through a first relay just can guarantee the security of charging process, can open or under the closed state at first relay, through the partial pressure detector monitoring at least one the voltage value at divider resistance both ends to whether normally closed or open is judged to quick accurate first relay. The utility model discloses interface circuit has not only reduced the quantity of relay, makes interface circuit's cost reduce by a wide margin, has still reduced interface circuit's complexity, and then makes the fault diagnosis logic of first relay simpler, and fault diagnosis and location are accurate more fast.
Another object of the present invention is to provide a distribution box to solve the problems of complicated design of interface circuit, large number of parts, high cost and difficulty in fault diagnosis in the conventional distribution box.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a distribution box, comprising: the interface circuit and the battery management module connected with the interface circuit.
The advantages of the power distribution box and the interface circuit are the same as those of the interface circuit in the prior art, and are not described in detail herein.
Another object of the present invention is to provide a charging management system to solve the problems of complicated design of interface circuit, large number of parts, high cost and difficulty in fault diagnosis in the existing charging management system.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a charging management system, comprising: the charging pile, the distribution box and the power battery are arranged;
the charging pile is connected with the power battery through an interface circuit of the distribution box.
Furthermore, a fifth relay and a sixth relay are further arranged on the charging pile;
one end of the fifth relay is connected with the anode of the charging pile, and the other end of the fifth relay is connected with the first end of the voltage division detection module of the interface circuit;
one end of the sixth relay is connected with the negative electrode of the charging pile, and the other end of the sixth relay is connected with the second end of the partial pressure detection module.
The charging management system and the interface circuit have the same advantages compared with the prior art, and are not described herein again.
A further object of the present invention is to provide a vehicle, which solves the problems of complicated design of interface circuit, large number of parts, high cost and difficulty in fault diagnosis of the existing vehicle.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a vehicle, the vehicle comprising: the distribution box is provided.
The vehicle and the interface circuit have the same advantages compared with the prior art, and are not described in detail herein.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of an interface circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a charging management system according to an embodiment of the present invention.
Description of reference numerals:
1: a distribution box; 2: charging piles; 3: a power battery; 10: an interface circuit; 11: a battery management module; 101: a partial pressure detection module; 102: a first relay; 1010: a voltage dividing resistor; 1011: a partial pressure detector; 103: a second relay; 104: a third relay; 105: a capacitor; 106: a fourth relay; 107: pre-charging a resistor; 201: a fifth relay; 202: a sixth relay; 203: and (4) a power supply.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment of the utility model provides an interface circuit is applied to the vehicle, the vehicle includes power battery, interface circuit specifically can include: the voltage division detection module and the first relay; the first end of the partial pressure detection module is connected with the anode of the power battery through the first relay, and the second end of the partial pressure detection module is connected with the cathode of the power battery; the voltage division detection module comprises a plurality of voltage division resistors connected in series and a voltage division detector; the voltage division detector is connected in parallel with at least one of the plurality of series-connected voltage division resistors, and is used for monitoring voltage values at two ends of the at least one voltage division resistor.
In the embodiment of the application, because the first end of partial pressure detection module is passed through first relay with power battery's positive pole links to each other, partial pressure detection module's second end with power battery's negative pole links to each other, the partial pressure detector with at least one in the divider resistance of a plurality of series connection the divider resistance is parallelly connected, the divider detector is used for, monitors the voltage at least one divider resistance both ends, consequently, give through above-mentioned interface circuit during power battery charges, not only opening or closing through a first relay just can guarantee the security of charging process, can open or under the closed state at first relay, through the divider detector monitoring at least one the voltage value at divider resistance both ends to whether quick accurate judgement first relay is normally closed or open.
The utility model discloses interface circuit has not only reduced the quantity of relay, makes interface circuit's cost reduce by a wide margin, has still reduced interface circuit's complexity, and then makes the fault diagnosis logic of first relay simpler, and fault diagnosis and location are accurate more fast.
Referring to fig. 1, a schematic structural diagram of an interface circuit according to an embodiment of the present invention is shown. As shown in fig. 1, the interface circuit 10 may specifically include: a voltage division detection module 101 and a first relay 102; the first end of the partial pressure detection module 101 is connected with the positive pole of the power battery 3 through a first relay 102, and the second end of the partial pressure detection module 101 is connected with the negative pole of the power battery 3; the voltage division detection module 101 comprises a plurality of voltage division resistors 1010 connected in series and a voltage division detector 1011; the voltage division detector 1011 is connected in parallel with at least one voltage division resistor 1010 of the plurality of voltage division resistors 1010 connected in series, and the voltage division detector 1011 is configured to monitor a voltage value at two ends of the at least one voltage division resistor 1010. The utility model discloses interface circuit 10 has not only reduced the quantity of relay, makes interface circuit 10's cost reduce by a wide margin, has still reduced interface circuit 10's complexity, and then makes first relay 102's fault diagnosis logic simpler, and fault diagnosis and location are accurate more fast.
In the embodiment of the application, when the power battery 3 is charged with the direct current quickly, the isolation before charging can be achieved through the first relay 102, and the functions of the direct current charging pile 2 and the power battery 3 are conducted during the direct current charging, so that the number of relays is effectively reduced, and the cost of the interface circuit 10 and the complexity of the interface circuit 10 are reduced. And, through set up the divider resistance 1010 of a plurality of series connections in the partial pressure detection module 101, voltage value at least one divider resistance 1010 both ends is monitored to partial pressure detector 1011 to before the direct current charges, can be through the monitoring of divider resistance 1011 to the resistance of series connection divider resistance 1010, thereby judge whether first relay 102 is normal, interface circuit 10 design and fault diagnosis logic are simple, therefore, fault diagnosis and location are simple accurate quick.
In the embodiment of the present application, since the plurality of voltage dividing resistors 1010 are connected in series, the voltage value at the two ends of each voltage dividing resistor 1010 is positively correlated with the value of the voltage dividing resistor 1010. In practical applications, the state of the first relay 102 can be obtained by the voltage across the power battery 3 and the resistance values of the plurality of voltage dividing resistors 1010. For example, when the first relay 102 is unexpectedly closed, since the normal state is an open circuit state at this time, the voltage value at both ends of each voltage dividing resistor 1010 in the plurality of voltage dividing resistors 1010 should be zero, and since the first relay 102 is unexpectedly closed, the circuit is in a closed state at this time, the voltage dividing detector 1011 can monitor that the voltage value at both ends of at least one voltage dividing resistor 1010 is greater than zero, at this time, it can be determined that the first relay 102 is unexpectedly closed (abnormal state), at this time, dc charging is not allowed, and dc charging is performed after the fault of the first relay 102 is detected, so that the safety of dc charging can be effectively improved.
Optionally, the resistances of the voltage dividing resistors 1010 are the same or different.
In this embodiment, in order to detect the fault diagnosis of the first relay 102, the calculation is simpler, the resistance values of the voltage dividing resistors 1010 connected in series can be set to be the same, and thus, the voltage across each voltage dividing resistor 1010 (i.e., the divided voltage across each voltage dividing resistor 1010) is the same, and by monitoring the voltage values across at least one voltage dividing resistor 1010, the output voltage value of the power battery 3 can be obtained, so that it can be determined whether the first relay 102 is in a normal state (the first relay 102 is closed or opened according to the control instruction) according to the voltage values across at least one voltage dividing resistor 1010, and therefore, in this embodiment, when the resistance values of the voltage dividing resistors 1010 connected in series are the same, the fault determination of the interface circuit 10 is simpler and faster. Certainly, the resistance values of the voltage dividing resistors 1010 connected in series can be set to be different, for example, in order to make the state detection process of the first relay 102 safer and more reliable, the resistance values of the voltage dividing resistors 1010 connected in series can be set to be different, and the voltage across the larger resistance value is monitored, so as to determine whether the first relay 102 is unexpectedly closed, adhered or disconnected, because the voltage across the larger resistance value is also larger, in this way, once there is voltage fluctuation or abnormality, the state of the first relay 102 is more easily determined. Moreover, since the voltage across the large resistance value is large, the corresponding voltage fluctuation is also large, and therefore, the accuracy of the divided voltage detector 1011 can also be reduced.
Optionally, the interface circuit 10 may further include: a second relay 103; one end of the first relay 102 is connected to the first end of the voltage division detection module 101, and the other end of the first relay 102 is connected to the positive electrode of the power battery 3 through the second relay 103.
In the embodiment of the present application, the second relay 103 is provided between the positive electrode of the power battery 3 and the first relay 102, so that when the power battery 3 is charged with direct current, the second relay 103 is turned on or turned off, thereby improving the safety of the direct current charging.
Optionally, the interface circuit 10 may further include: a third relay 104; the second end of the partial voltage detection module 101 is connected with the negative electrode of the power battery 3 through a third relay 104.
In the embodiment of the present application, the third relay 104 is provided between the negative electrode of the power battery 3 and the second end of the divided voltage detection module 101, so that when the power battery 3 is charged with direct current, the third relay 104 is turned on or closed, thereby improving the safety of the direct current charging.
Optionally, the interface circuit 10 may further include: a capacitor 105; one end of the capacitor 105 is connected between the first relay 102 and the second relay 103, and the other end of the capacitor 105 is connected between the other end of the voltage division detection module 101 and the third relay 104.
In this embodiment, the capacitor 105 may be a capacitor 105 between the positive electrode and the negative electrode of the vehicle-mounted high-voltage circuit, and the capacitor 105 is used to protect the power battery 3 and prevent the power battery 3 from being broken down at the high-voltage moment due to the electric shock at the high-voltage moment. It is understood that the function of the capacitor 105 may also have the characteristics of blocking direct current, connecting alternating current and blocking low frequency, and the embodiment of the present application only gives an illustration of one of them, and should not be understood as a limitation to the function of the capacitor 105.
In practical applications, the rated voltage of the capacitor 105 matches the rated voltage of the power battery 3, and those skilled in the art can select the type and specific model of the capacitor 105 according to actual requirements, which is not limited in the embodiment of the present application.
Optionally, the interface circuit 10 may further include: a fourth relay 106 and a pre-charge resistor 107; one end of the fourth relay 106 is connected with the pre-charging resistor 107, and the other end of the fourth relay 106 is connected with one end of the second relay 103; the other end of the precharge resistor 107 is connected to the other end of the second relay 103.
In the embodiment of the present application, in order to further improve the safety of the interface circuit 10, a fourth relay 106 and a pre-charge resistor 107 connected in series with the fourth relay 106 may be connected in parallel to the second relay 103.
In practical application, when the state of the first relay 102 is detected, the third relay 104 may be controlled to be closed first, and then the fourth relay 106 is controlled to be closed, because the pre-charge resistor 107 is connected in series to the fourth relay 106, the high voltage of the power battery 3 is prevented from being instantaneously loaded to the two ends of the capacitor 105, and the capacitor 105 is prevented from being broken down by a large current. When the voltage across the capacitor 105 is the same as the voltage across the power battery 3 or within a preset range (for example, when the voltage across the capacitor 105 is greater than 90% of the voltage across the power battery 3), the second relay 103 is closed again, and the fourth relay 106 is opened, so that the state of the first relay 102 is detected.
In this embodiment, in order to improve the safety of dc charging, before dc charging, it is necessary to first detect whether the state of the first relay 102 is normal, at this time, the second relay 103 and the third relay 104 may be first controlled to be closed, and then the voltage value at two ends of at least one voltage dividing resistor 1010 is monitored by the voltage dividing detector 1011, for example, the voltage dividing detector 1011 detects the voltage at two ends of one voltage dividing resistor 1010 in the multiple voltage dividing resistors 1010, because the first relay 102 is in an open state at this time, the voltage monitored by the voltage dividing detector 1011 is theoretically zero, therefore, it may be determined whether the first relay 102 is in an adhesion state or an unexpected closed state by the voltage at the current state of the voltage dividing detector 1011. Further, the first relay 102 may be controlled to be closed, and at this time, the voltage value detected by the voltage dividing detector 1011 is equal to the voltage x across the power battery 3 (voltage dividing resistor 1010 corresponding to the voltage dividing detector 1011/total voltage dividing resistor 1010 connected in series), so that it can be determined whether the first relay 102 is closed as expected by the voltage value detected by the voltage dividing detector 1011. Through the above determination, before the dc charging, whether the state of the first relay 102 is normal or not can be detected and determined, so that the safety of the dc charging is improved.
To sum up, the embodiment of the present invention provides an interface circuit having the following advantages:
in the embodiment of the application, because the first end of partial pressure detection module is passed through first relay with power battery's positive pole links to each other, partial pressure detection module's second end with power battery's negative pole links to each other, the partial pressure detector with at least one in the divider resistance of a plurality of series connection the divider resistance is parallelly connected, the divider detector is used for, monitors the voltage at least one divider resistance both ends, consequently, give through above-mentioned interface circuit during power battery charges, not only opening or closing through a first relay just can guarantee the security of charging process, can open or under the closed state at first relay, through the divider detector monitoring at least one the voltage value at divider resistance both ends to whether quick accurate judgement first relay is normally closed or open. The utility model discloses interface circuit has not only reduced the quantity of relay, makes interface circuit's cost reduce by a wide margin, has still reduced interface circuit's complexity, and then makes the fault diagnosis logic of first relay simpler, and fault diagnosis and location are accurate more fast.
The embodiment of the utility model provides a distribution box is still provided, distribution box specifically can include: the interface circuit, and the battery management module who links to each other with above-mentioned interface circuit.
In the embodiment of the application, when the power battery is charged through the interface circuit in the power distribution box, the state of each device in the interface circuit can be detected and judged through the battery management module. For example, after the battery management module enables the first relay (controls the first relay to be closed), the output voltages at two ends of the power battery and the voltage detected by the voltage division detector in the interface circuit are detected, so that the ratio of the voltage detected by the voltage division detector to the output voltage of the power battery is calculated, the ratio of the total resistance values of the voltage division resistors corresponding to the voltage division detector and the plurality of series voltage division resistors is calculated, comparison is performed through the two ratios, and the effect of judging whether the first relay is closed as expected is achieved.
In practical application, the voltage division detector can be integrated with the battery management module, the voltage at two ends of at least one voltage division resistor is directly detected through the battery management module, and therefore the state of the first relay is detected, the circuit of the distribution box is simpler, and the number of parts is less.
The embodiment of the utility model provides an in, among the interface circuit of block terminal, not only reduced the quantity of relay, make interface circuit's cost reduce by a wide margin, still reduced interface circuit's complexity, and then make the fault diagnosis logic of first relay simpler, fault diagnosis and location are accurate more fast.
The embodiment of the utility model provides a charging management system is still provided. Referring to fig. 2, a schematic diagram of a charging management system according to an embodiment of the present invention is shown. The charging management system may specifically include: the charging pile 2, the distribution box 1 and the power battery 3; the charging pile 2 charges the power battery 3 through an interface circuit 10 of the distribution box 1.
Specifically, a fifth relay 201 and a sixth relay 202 are further arranged on the charging pile 2; one end of the fifth relay 201 is connected with the positive electrode of the power supply 203 of the charging pile 2, and the other end of the fifth relay 201 is connected with the first end of the voltage division detection module 101 of the interface circuit 10; one end of the sixth relay 202 is connected to the negative electrode of the power supply 203 of the charging pile 2, and the other end of the sixth relay 202 is connected to the second end of the voltage division detection module 101.
In the embodiment of the application, after the charging pile 2 is connected to the power battery 3 through the interface circuit 10, the battery management module 11 is initialized (the battery management module 11 is started), then a handshake phase between the battery management module 11 and the charging pile 2 (which is equivalent to the information exchange and intercommunication between the battery management module 11 and the charging pile 2) is entered, after the handshake phase is finished, the battery management module 11 enables the interface circuit 10 in the distribution box 1, the voltage divider 1011 in the interface circuit 10 detects the output voltage of the charging pile 2, the voltage value of the charging pile 2 side detected by the voltage divider 1011 is uploaded to the battery management system and compared with a preset threshold (usually set to 60V), if the voltage value detected by the voltage divider 1011 is less than or equal to 60V in the state that the fifth relay 201 and the sixth relay 202 are disconnected, the fifth relay 201 and the sixth relay 202 are considered to be normally disconnected, charging can be performed, otherwise, charging is prohibited, and the battery management module 11 reports a fault to the upper (main control unit of the vehicle). Under the condition that the fifth relay 201 and the sixth relay 202 are normally opened, the battery management system sends an enabling signal to drive the second relay 103 and the third relay 104 in the interface circuit 10 to be closed, adhesion detection of the first relay 102 is carried out, and if the battery management system judges that the first relay 102 is normal in state (can be normally opened or closed), normal charging is carried out; otherwise, reporting the fault.
In the charge management system of this application embodiment, just can play through a first relay 102 in interface circuit 10 and keep apart before charging, switch on the function that electric pile 2 and power battery 3 when permitting to charge, consequently, the utility model discloses an interface circuit 10 has not only reduced the quantity of relay, makes interface circuit 10's cost reduce by a wide margin, has still reduced interface circuit 10's complexity, and then makes first relay 102's fault diagnosis logic simpler, and fault diagnosis and location are accurate more fast.
The embodiment of the utility model provides a still provide a vehicle, the vehicle specifically can include: the distribution box is provided.
In the vehicle provided by the embodiment of the utility model, because the first end of the partial pressure detection module is connected with the anode of the power battery through the first relay, the second end of the voltage division detection module is connected with the negative electrode of the power battery, the voltage division detector is connected with at least one voltage division resistor in the plurality of voltage division resistors which are connected in series in parallel, the voltage divider detector is configured to monitor a voltage across the at least one voltage divider resistor, and, therefore, when the power battery is charged through the interface circuit, the safety of the charging process can be ensured through the opening or closing of the first relay, the voltage value of two ends of at least one voltage division resistor can be monitored through a voltage division detector under the condition that the first relay is opened or closed, so that whether the first relay is normally closed or opened or not can be rapidly and accurately judged. The utility model discloses interface circuit has not only reduced the quantity of relay, makes interface circuit's cost reduce by a wide margin, has still reduced interface circuit's complexity, and then makes the fault diagnosis logic of first relay simpler, and fault diagnosis and location are accurate more fast.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An interface circuit for a vehicle including a power battery, the interface circuit comprising: the voltage division detection module and the first relay;
the first end of the partial pressure detection module is connected with the anode of the power battery through the first relay, and the second end of the partial pressure detection module is connected with the cathode of the power battery;
the voltage division detection module comprises a plurality of voltage division resistors connected in series and a voltage division detector;
the voltage division detector is connected in parallel with at least one of the plurality of series-connected voltage division resistors, and is used for monitoring voltage values at two ends of the at least one voltage division resistor.
2. The interface circuit according to claim 1, wherein the resistances of the voltage dividing resistors are the same or different.
3. The interface circuit of claim 1, wherein the interface circuit further comprises: a second relay;
one end of the first relay is connected with the first end of the partial pressure detection module, and the other end of the first relay is connected with the anode of the power battery through the second relay.
4. The interface circuit of claim 3, further comprising: a third relay;
and the second end of the partial pressure detection module is connected with the negative electrode of the power battery through the third relay.
5. The interface circuit of claim 4, further comprising: a capacitor;
one end of the capacitor is connected between the first relay and the second relay, and the other end of the capacitor is connected between the other end of the voltage division detection module and the third relay.
6. The interface circuit of claim 5, wherein the interface circuit further comprises: a fourth relay and a pre-charging resistor;
one end of the fourth relay is connected with the pre-charging resistor, and the other end of the fourth relay is connected with one end of the second relay;
and the other end of the pre-charging resistor is connected with the other end of the second relay.
7. A distribution box, comprising: the interface circuit of any of claims 1-6, and a battery management module coupled to the interface circuit.
8. A charge management system, comprising: a charging pile, the distribution box of claim 7 and a power battery;
the charging pile is connected with the power battery through an interface circuit of the distribution box.
9. The charging management system of claim 8, wherein a fifth relay and a sixth relay are further provided on the charging pile;
one end of the fifth relay is connected with the positive electrode of the power supply of the charging pile, and the other end of the fifth relay is connected with the first end of the voltage division detection module of the interface circuit;
one end of the sixth relay is connected with the negative electrode of the power supply of the charging pile, and the other end of the sixth relay is connected with the second end of the partial pressure detection module.
10. A vehicle, characterized in that the vehicle comprises: a distribution box according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021037965.5U CN212861167U (en) | 2020-06-08 | 2020-06-08 | Interface circuit, distribution box, charging management system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021037965.5U CN212861167U (en) | 2020-06-08 | 2020-06-08 | Interface circuit, distribution box, charging management system and vehicle |
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| Publication Number | Publication Date |
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| CN212861167U true CN212861167U (en) | 2021-04-02 |
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| CN202021037965.5U Active CN212861167U (en) | 2020-06-08 | 2020-06-08 | Interface circuit, distribution box, charging management system and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115912899A (en) * | 2023-02-20 | 2023-04-04 | 广东东菱电源科技有限公司 | Capacitor series voltage division circuit |
| CN116533767A (en) * | 2023-07-07 | 2023-08-04 | 广汽埃安新能源汽车股份有限公司 | Relay circuit of power battery pack and relay fault identification method |
-
2020
- 2020-06-08 CN CN202021037965.5U patent/CN212861167U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115912899A (en) * | 2023-02-20 | 2023-04-04 | 广东东菱电源科技有限公司 | Capacitor series voltage division circuit |
| CN116533767A (en) * | 2023-07-07 | 2023-08-04 | 广汽埃安新能源汽车股份有限公司 | Relay circuit of power battery pack and relay fault identification method |
| CN116533767B (en) * | 2023-07-07 | 2023-09-12 | 广汽埃安新能源汽车股份有限公司 | Relay circuit of power battery pack and relay fault identification method |
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