CN214729338U - Circuit system for starting and stopping motor car based on single switch - Google Patents
Circuit system for starting and stopping motor car based on single switch Download PDFInfo
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- CN214729338U CN214729338U CN202120902090.9U CN202120902090U CN214729338U CN 214729338 U CN214729338 U CN 214729338U CN 202120902090 U CN202120902090 U CN 202120902090U CN 214729338 U CN214729338 U CN 214729338U
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Abstract
The utility model discloses a circuit system based on single switch start-stop electric motor car, including power battery, switching power supply, battery management system, latching relay, total positive relay, still include the start-stop switch, the start-stop switch contains the first switch and the second switch that close simultaneously or break simultaneously, the first switch with latching relay connects in parallel; when the first switch is closed, the power battery provides power for the battery management system through the switch power supply; and the battery management system controls the opening and closing states of the self-locking relay and the main positive relay according to the level signal of the second switch. The utility model discloses only use one to open and stop the switch, just can control the start-up and the stop of electric motor car, need not to discern when the operation, convenient operation reduces the error.
Description
Technical Field
The utility model relates to a circuit system of electric motor car stop-start especially involves a circuit system based on single switch opens power failure motor car.
Background
The conventional on-off circuit system of the low-speed electric vehicle generally adopts two inching self-resetting switches, one is a normally open starting switch and the other is a normally closed stopping switch, when the power is on, the starting switch is pressed down, a power supply loop of a switch power supply is switched on, voltage is output to a battery management system BMS, and the battery management system BMS controls a self-locking relay to be closed; when the starting switch is switched off, the self-locking relay is already closed, so that a power supply loop of the switching power supply can not be switched off, and the self-locking function is achieved; then the battery management system BMS controls the main positive relay to be closed, the power line output circuit is switched on, and the vehicle enters a ready-to-run state.
When the vehicle stops using, the driver presses down the stop switch, the power supply loop of the switch power supply is cut off, the output of the power supply voltage is stopped, the battery management system BMS loses power, the self-locking relay and the main positive relay switch are disconnected, all loops are powered off, and power can not be consumed subsequently. If the driver forgets to press the stop switch, the battery management system BMS detects whether the power line has current output or input at intervals within a certain time, such as half an hour, if the power line does not detect the current output or input within the half hour, the vehicle is judged to be in a long-term stop non-use state, and at the moment, the battery management system BMS automatically controls the self-locking relay and the main positive relay to be disconnected, all loops are cut off, and power is not consumed any more subsequently.
The low-speed electric vehicle on-off circuit system in the prior art adopts two inching switches, a driver needs to identify the two switches during operation, the operation is inconvenient, and errors are easily caused, so that the circuit system which only adopts a single switch to control the starting and stopping of the electric vehicle is needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a circuit system based on single switch just can realize electric motor car start and stop function, convenient operation reduces the error.
In order to achieve the purpose, the utility model provides a circuit system based on single switch start-stop electric motor car, including power battery, switching power supply, the battery management system who is connected with switching power supply output, latching relay, connect the total positive relay on the anodal power line of power battery, still include the start-stop switch, the start-stop switch contains the first switch and the second switch that close simultaneously or break off simultaneously, the first switch with latching relay connects in parallel, has two connected nodes, one of them with the power battery positive pole is connected, the other with switching power supply input end is connected; when the first switch is closed, the power battery provides power for the battery management system through the switch power supply; the second switch is respectively connected with the output end of the switch power supply and the battery management system, and the battery management system controls the opening and closing states of the self-locking relay and the main positive relay according to a level signal of the second switch.
Optionally, the electric vehicle further comprises a shunt connected to the positive electrode or negative electrode power line of the power battery, and the battery management system detects output or input of the power line current through the shunt, so as to determine the use state of the electric vehicle.
Optionally, the battery management system determines the use state of the electric vehicle by setting a time period for detecting the output or input of the power line current.
Optionally, a detection port is arranged on the battery management system, the detection port is used for detecting a level signal, the second switch is respectively connected with the positive electrode of the output end of the switching power supply and the detection port of the battery management system, and the detection port detects the level signal transmitted by the second switch.
Optionally, the latching relay and the main positive relay both include a switch part and a coil part, the first switch is connected in parallel with the switch part of the latching relay, and the switch part of the main positive relay is connected to the positive power line of the power battery; the battery management system is provided with two control interfaces, wherein one control interface is connected with the coil part of the self-locking relay and is used for outputting or stopping outputting a level control signal to control the opening and closing state of the self-locking relay; and the other control interface is connected with the coil part of the main positive relay and used for outputting or stopping outputting a level control signal to control the opening and closing state of the main positive relay.
Optionally, the output end of the switching power supply is further connected with an electric vehicle controller, and the power battery provides power for the electric vehicle controller through the output end of the switching power supply.
Optionally, a negative power line of the power battery is connected to a total negative relay, and the battery management system is connected to the total negative relay and controls the total negative relay to be turned on or off according to a level signal of the second switch.
Optionally, the start-stop switch is a normally open double-close point self-reset switch.
Compared with the prior art, the technical scheme of the utility model has following advantage: the utility model discloses only use one to open in power supply circuit and stop the switch, make battery management system according to opening the level signal who opens the switch, remove the closure and the disconnection of control relay, realize the start-up and the stop of electric motor car. The utility model can control the start and stop of the electric vehicle by using only one start-stop switch, and the electric vehicle does not need to be identified when in use, thereby having convenient operation and reducing errors; in addition, when the electric vehicle is stopped, the power supply can be automatically cut off after the start-stop switch is forgotten to be pressed, and a power battery is protected.
Drawings
FIG. 1 is a circuit schematic diagram of a prior art on-off circuit for an electric vehicle;
fig. 2 is a schematic circuit diagram of the circuit system of the utility model based on a single switch starting and stopping electric vehicle;
fig. 3 is the schematic diagram of the start/stop switch of the present invention.
In the figure: 1. the power battery, 2, the switching power supply, 3, the battery management system, 4, the latching relay, 5, total positive relay, 6, the start-stop switch, 61, the first switch, 62 second switch, 7, the shunt.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are simplified and in non-precise proportion, and are only used for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.
As shown in fig. 2 and 3, the circuit principle of the circuit system of the electric vehicle based on single switch start-up of the present invention is illustrated. The utility model discloses in, the circuit system based on single switch start-stop motor car includes power battery 1, switching power supply 2, the battery management system 3 who is connected with switching power supply 2 output, latching relay 4, connect the total positive relay 5 on power battery 1 anodal B + power line, still include start-stop switch 6, start-stop switch 6 contains first switch 61 and the second switch 62 that closes simultaneously or breaks off simultaneously, first switch 61 and latching relay 4 are parallelly connected, have two connected nodes, one of them is connected with power battery 1 anodal B +, another is connected with switching power supply 2 input; when the first switch 61 is closed, the power battery 1 supplies power to the battery management system 3 through the switching power supply 2; the second switch 62 is respectively connected with the output end of the switch power supply 2 and the battery management system 3, and the battery management system 3 controls the opening and closing states of the self-locking relay 4 and the main positive relay 5 according to the level signal of the second switch 62.
In this embodiment, the voltage of the switching power supply 2 is 12V, and the start-stop switch 6 is a normally open type double-open double-close self-reset switch. As shown in fig. 2, when the electric vehicle is started, the start-stop switch 6 is pressed, the first switch 61 and the second switch 62 are simultaneously closed, the circuit between the power battery 1 and the switching power supply 2 is switched on, 12V high level voltage is provided for the battery management system 3, the second switch 62 transmits a high level signal to the battery management system 3, the battery management system 3 controls the self-locking relay 4 to be closed according to the high level signal, the circuit self-locking function is completed, the battery management system 3 also controls the main positive relay 5 to be closed, the power line is switched on, and the electric vehicle enters a state to be driven. After the start-stop switch is released, the first switch 61 and the second switch 62 are simultaneously switched off, and the connection of the circuit between the power battery and the switching power supply 2 can still be maintained through the self-locking relay 4. When the electric motor car stopped using, press the start-stop switch once more, first switch 61 and second switch 62 are closed simultaneously, and battery management system 3 receives the high level signal that second switch 6 transmitted, and at this moment control latching relay 4 and the disconnection of total positive relay 5, the cut-off circuit, and battery management system 3 loses the power, and the electric motor car is no longer power consumptive. The starting and stopping of the electric vehicle are controlled by the same switch, and the electric vehicle is not required to be identified before operation, so that the electric vehicle is simple and convenient.
Specifically, the utility model discloses still include shunt 7, shunt 7 is connected on power battery 1's anodal B + or negative pole B-power line, and battery management system 3 detects the output or the input of power line current through shunt 7 to judge the user state of electric motor car. As shown in fig. 2, in the present embodiment, the shunt 7 is connected to the negative electrode B-power line of the power battery 1, a detection port F is provided in the battery management system 3, and the shunt 7 is connected to the detection port F; if the battery management system 3 detects that current is input, the electric vehicle is judged to be in a running state, the main positive relay 5 is continuously kept in a closed state, if the current is not input, the electric vehicle is judged to be stopped to be used, the battery management system 3 controls the main positive relay 5 to be disconnected, a power line is cut off, then the self-locking relay 4 is controlled to be disconnected, and a power supply loop is cut off. Because the driver stops when using the car, can forget to press the condition of opening the stop switch, the electric motor car can continue power consumptively, has a damage to the battery, the utility model discloses a battery management system realizes the circuit auto-power-off to the detection of power line current, protects the battery, extension battery life.
Specifically, the battery management system 3 determines the use state of the electric vehicle by setting a time period for detecting the output or input of the power line current. For example, a half-hour duration is set, in the half-hour, the battery management system 3 detects the current condition of the power line every 5 minutes, if the input of the current is detected in the half-hour, the temporary stop is considered, and the positive relay 5 is kept in the closed state; if the current input is not detected within half an hour, the vehicle is considered to be stopped for a long time, and then the battery management system 3 controls the main positive relay 5 to be disconnected, the power line is cut off, and then controls the self-locking relay 4 to be disconnected, and the power supply loop is cut off. In order to avoid the electric motor car when parking temporarily the circuit also by automatic cutout, need frequent restart, the utility model discloses it is long when utilizing battery management system to set up the detection, judges whether park for a long time, carries out the auto-power-off again.
Specifically, as shown in fig. 2, the battery management system 3 is provided with a detection port T1, the detection port T1 is used for detecting a level signal, the second switch 62 is connected to the positive electrode of the output terminal of the switching power supply 2 and the detection port of the battery management system 3 respectively by T1, and the detection port T1 detects the level signal transmitted by the second switch 62. The battery management system 3 controls the relay to be closed and opened according to the level signal detected by the detection port T1.
Specifically, the latching relay 4 and the main positive relay 5 both comprise a switch part and a coil part, the first switch 61 is connected in parallel with the switch part of the latching relay 4, and the switch part of the main positive relay 5 is connected to the positive pole B + power line of the power battery 1; the battery management system 3 is provided with two control interfaces, wherein one control interface K1 is connected with the coil part of the latching relay 4 and is used for outputting or stopping outputting a level control signal to control the opening and closing state of the latching relay 4; the other control interface K2 is connected to the coil part of the main positive relay 5 for outputting or stopping the output of the level control signal to control the open/close state of the main positive relay 5. When the electric vehicle is started, the start-stop switch 6 is pressed, the battery management system 3 detection port T1 detects a high level signal transmitted by the second switch 62, the control interface K1 is detected firstly, if the output of the high level control signal is not detected, the electric vehicle is judged to be started, the battery management system 3 controls the K1 to output the high level control signal to control the self-locking relay 4 to be closed, the self-locking function of the circuit is completed, then the K2 is controlled to output the high level control signal, the main positive relay 5 is closed, the power line output is switched on, and the electric vehicle is enabled to enter a state ready to run; when the vehicle needs to be stopped, the start-stop switch 6 is pressed, the detection port T1 of the battery management system 3 detects a high level signal transmitted by the second switch 62, the control interface K1 is detected, if the output of the high level control signal is detected, the electric vehicle is in a power-on state, and at the moment, the electric vehicle is judged to be stopped to be used and needs to be powered off; when the start-stop switch is released, the detection port T1 of the battery management system 3 detects that the high level signal transmitted by the second switch 6 is changed into the low level signal, the battery management system 3 firstly controls the K2 to stop outputting the high level control signal, so that the main positive relay 5 is disconnected, the high-voltage loop is disconnected, then the K1 is controlled to stop outputting the high level control signal, the self-locking relay 4 is disconnected, the power supply loop of the switch power supply is cut off, the battery management system 3 loses the power supply, all loops are powered off, and the electric vehicle does not consume power any more. Through the detection to control interface K1, go to judge the electric motor car and need to go up the electricity or power off, carry out the control to latching relay and total positive relay state of opening and shutting again.
Specifically, the output end of the switching power supply 2 is further connected with an electric vehicle controller (not shown in the figure), and the power battery 1 supplies power to the electric vehicle controller through the output end of the switching power supply 2, so as to supply power to a display screen and a display lamp of the electric vehicle.
Specifically, a total negative relay (not shown in the figure) is further connected to a negative power line of the power battery, the total negative relay is connected to the battery management system 3, and the battery management system 3 can control the total negative relay to be closed and opened, so that the power battery is further protected.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (8)
1. The utility model provides a circuit system based on single switch opens power failure motor car, includes power battery (1), switching power supply (2), battery management system (3) of being connected with switching power supply (2) output, latching relay (4), connects total positive relay (5) on power battery (1) anodal power line, its characterized in that: the power battery protection circuit further comprises a start-stop switch (6), wherein the start-stop switch (6) comprises a first switch (61) and a second switch (62) which are closed or opened simultaneously, the first switch (61) is connected with the self-locking relay (4) in parallel and is provided with two connecting nodes, one of the two connecting nodes is connected with the positive electrode of the power battery (1), and the other connecting node is connected with the input end of the switching power supply (2); when the first switch (61) is closed, the power battery (1) supplies power to the battery management system (3) through the switch power supply (2); the second switch (62) is respectively connected with the output end of the switch power supply (2) and the battery management system (3), and the battery management system (3) controls the opening and closing states of the self-locking relay (4) and the main positive relay (5) according to a level signal of the second switch (62).
2. The single switch-based power on vehicle circuitry of claim 1, wherein: the power battery management system further comprises a shunt (7), the shunt (7) is connected to the positive pole or negative pole power line of the power battery (1), and the battery management system (3) detects the output or input of the power line current through the shunt (7), so that the using state of the electric vehicle is judged.
3. The single switch-based power on vehicle circuitry of claim 2, wherein: the battery management system (3) judges the use state of the electric vehicle by setting the time length for detecting the current output or input of the power line.
4. The single switch-based power on vehicle circuitry of claim 3, wherein: the battery management system (3) is provided with a detection port, the detection port is used for detecting level signals, the second switch (62) is respectively connected with the positive electrode of the output end of the switch power supply (2) and the detection port of the battery management system (3), and the detection port detects the level signals transmitted by the second switch (62).
5. The single switch-based power on vehicle circuitry of claim 4, wherein: the self-locking relay (4) and the main positive relay (5) both comprise a switch part and a coil part, the first switch (61) is connected with the switch part of the self-locking relay (4) in parallel, and the switch part of the main positive relay (5) is connected to a positive power line of the power battery (1); the battery management system (3) is provided with two control interfaces, wherein one control interface is connected with a coil part of the self-locking relay (4) and is used for outputting or stopping outputting a level control signal to control the opening and closing state of the self-locking relay (4); and the other control interface is connected with the coil part of the main positive relay (5) and used for outputting or stopping outputting a level control signal to control the opening and closing state of the main positive relay (5).
6. The single switch-based power on vehicle circuitry of any one of claims 1-5, wherein: the output end of the switching power supply (2) is also connected with an electric vehicle controller, and the power battery (1) supplies power to the electric vehicle controller through the output end of the switching power supply (2).
7. The single switch-based power on vehicle circuitry of any one of claims 1-5, wherein: and a negative power line of the power battery (1) is connected with a total negative relay, and the battery management system (3) is connected with the total negative relay and controls the total negative relay to be closed and opened according to a level signal of the second switch (62).
8. The single switch-based power on vehicle circuitry of any one of claims 1-5, wherein: the start-stop switch (6) is a normally-open double-close point self-reset switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120902090.9U CN214729338U (en) | 2021-04-28 | 2021-04-28 | Circuit system for starting and stopping motor car based on single switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120902090.9U CN214729338U (en) | 2021-04-28 | 2021-04-28 | Circuit system for starting and stopping motor car based on single switch |
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| Publication Number | Publication Date |
|---|---|
| CN214729338U true CN214729338U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120902090.9U Active CN214729338U (en) | 2021-04-28 | 2021-04-28 | Circuit system for starting and stopping motor car based on single switch |
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| CN (1) | CN214729338U (en) |
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2021
- 2021-04-28 CN CN202120902090.9U patent/CN214729338U/en active Active
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