CN214255810U - Power supply circuit of relay - Google Patents
Power supply circuit of relay Download PDFInfo
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- CN214255810U CN214255810U CN202120457011.8U CN202120457011U CN214255810U CN 214255810 U CN214255810 U CN 214255810U CN 202120457011 U CN202120457011 U CN 202120457011U CN 214255810 U CN214255810 U CN 214255810U
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Abstract
The utility model discloses a power supply circuit of relay specifically includes: the first end of the switch unit is connected with the first output end of the power battery pack; the input end of the DC/DC controller is connected with the second end of the switch unit, and the output end of the DC/DC controller is connected with the electrode of the first relay arranged at the second output end of the power battery pack; the power supply device supplies power to the first relay through the power battery pack, the switch unit, the DC/DC controller and the first relay which are connected in sequence. The utility model discloses a DC/DC controller adjustment power battery package's output current replaces lead acid battery to supply power for first relay. Because the DC/DC controller has the characteristic of stably and continuously outputting voltage and current, the first relay can be stably and continuously supplied with power, the problem that the first relay cannot be attracted due to unstable power supply of a lead-acid battery is solved, and the normal work of the first relay is ensured.
Description
Technical Field
The utility model relates to a circuit design technical field specifically is a supply circuit of relay.
Background
The relay is an electric control switch device, when voltage and current are applied to a wound iron coil, an iron core generates electromagnetic attraction to attract an armature switch, when power supply to the wound iron coil is cancelled, the electromagnetic attraction disappears, and the armature switch is disconnected under the action of a spring. Therefore, the operation of a circuit connected with the relay switch is realized, wherein the power battery pack of the electric vehicle uses the relay as the switch.
The power battery package output current voltage of electric motor car is higher, and this just requires the relay to have great actuation force, and the winding iron coil that also needs to be to the relay lasts and applys higher voltage and electric current, and general electric motor car provides voltage and electric current for the relay through lead-acid batteries, and lead-acid batteries's characteristic is that long-time output heavy current can reduce output voltage, and this voltage and the electric current that just leads to applying to winding iron coil are not enough, cause the unable actuation of relay, influence the output work of power battery package.
The prior art does not find a technical scheme capable of solving the problem that the relay cannot be attracted.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a supply circuit of relay can solve because the unstable relay that leads to of lead acid battery power supply still can't the problem of actuation.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a power supply circuit for a relay comprising:
the first end of the switch unit is connected with the first output end of the power battery pack; the first output end of the power battery pack is connected with the second output end of the power battery pack in parallel;
the input end of the DC/DC controller is connected with the second end of the switch unit, and the output end of the DC/DC controller is connected with the electrode of a first relay arranged at the second output end of the power battery pack and used for supplying power to the first relay;
the first relay is used for controlling the opening and closing of the first output end of the power battery pack.
Optionally, the switching unit is a semiconductor Metal Oxide Semiconductor (MOS) transistor or a second relay.
Optionally, the power supply circuit further includes:
and the power supply battery with the output end connected with the semiconductor metal oxide MOS tube or the second relay is used for supplying power to the semiconductor metal oxide MOS tube or the second relay.
Optionally, the power supply battery is a lead-acid battery.
Optionally, an input end of the power supply battery is connected to an output end of the DC/DC controller.
Optionally, the power supply circuit further includes: and the current limiting resistor is arranged between the input end of the power supply battery and the output end of the DC/DC controller.
Optionally, the resistance value of the current-limiting resistor is obtained by dividing the output voltage of the DC/DC controller by the charging current rating of the power supply battery.
Optionally, the DC/DC controller is a unidirectional step-down DC/DC controller.
According to the above technical scheme, the utility model discloses an among the power supply circuit of relay, specifically include: the first end of the switch unit is connected with the first output end of the power battery pack; the input end of the DC/DC controller is connected with the second end of the switch unit, and the output end of the DC/DC controller is connected with the electrode of the first relay arranged at the second output end of the power battery pack; the power supply device supplies power to the first relay through the power battery pack, the switch unit, the DC/DC controller and the first relay which are connected in sequence. The utility model discloses a DC/DC controller adjustment power battery package's output current replaces lead acid battery to supply power for first relay. Because the DC/DC controller has the characteristic of stably and continuously outputting voltage and current, the first relay can be stably and continuously supplied with power, the problem that the first relay cannot be attracted due to unstable power supply of a lead-acid battery is solved, and the normal work of the first relay is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power supply circuit of a relay disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a relay disclosed in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power supply circuit of another relay disclosed in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power supply circuit of another relay disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a power supply circuit of relay can solve the problem of the unable actuation of relay that leads to because the lead acid battery power supply is unstable.
As shown in fig. 1, an embodiment of the present invention discloses a power supply circuit 100 of a relay, including:
a switching unit 101 and a DC/DC controller 102; wherein:
the first end of the switch unit 101 is connected with the first output end of the power battery pack 103; the first output end of the power battery pack 103 is connected in parallel with the second output end of the power battery pack 103.
An input end of the DC/DC controller 102 is connected to a second end of the switch unit 101, and an output end of the DC/DC controller 102 is connected to a pole of the first relay 104, so as to supply power to the first relay 104; the first relay 104 is installed at the second output end of the power battery pack 103. The first relay 104 is used for controlling the opening and closing of the second output end of the power battery pack 103.
It should be noted that, the DC/DC controller 102 is the voltage converter that effectively exports fixed voltage after changing input voltage, and it has the characteristic that can stably provide voltage and electric current, just in time accords with the condition that first relay 104 need continuously receive voltage and electric current during operation, consequently the utility model discloses a DC/DC controller 102 replaces the lead-acid battery, supplies power for the first relay 104 that the second output of control power battery package 103 opened and shut.
Referring to fig. 1, when the DC/DC controller 102 continuously outputs voltage and current to the first relay 104, the iron coil in the first relay 104 generates a magnetic field under the action of the voltage and current, so that the iron core generates electromagnetic attraction, the armature is closed and conducted, the second output end of the power battery pack 103 outputs the voltage and current to the motor controller 105, and then the voltage and current is transmitted to the motor 106 by the motor controller 105, and the motor 106 rotates to drive the electric vehicle to run.
When the switch unit 101 is turned off, the DC/DC controller 102 stops continuously outputting voltage and current to the first relay 104, the iron coil in the first relay loses the voltage and current function and no longer generates a magnetic field, the electromagnetic attraction of the iron core disappears, the armature returns under the action of the spring or the elastic deformation of the armature, the circuit is turned off, and the second output end of the power battery pack 103 no longer outputs voltage and current to the motor controller 105. Thus, the output of the second output of power battery pack 103 may be controlled by way of DC/DC controller 102 powering up and down first relay 104.
However, since the DC/DC controller 102 cannot generate voltage current, it is necessary to connect the input terminal of the DC/DC controller 102 to the first output terminal of the power battery pack, step down the current voltage output from the first output terminal of the power battery pack 103, and transmit the current voltage to the first relay 104, and in order to control the DC/DC controller 102 to power on and off the first relay 104, the switch unit 101 is added between the first output terminal of the power battery pack 103 and the input terminal of the DC/DC controller 102, and the DC/DC controller 102 is controlled to power on and off the first relay 104 by opening and closing the switch unit 101.
Optionally, the switch unit 101 is a Metal Oxide Semiconductor (MOS) transistor or a second relay.
It should be noted that the MOS transistor is an electrical component having a switching function, and the MOS transistor may be a bipolar transistor, and when the voltages applied to the base and the emitter reach a preset value, the collector and the emitter are conducted, as in the case of a switch connection, so that the power battery pack 103 outputs a current and a voltage to the DC/DC controller 102 through the first output terminal; the MOS transistor may also be a field effect transistor, and when the voltage applied to the gate and the source reaches a preset value, the drain and the source are turned on, as with the switch connection, so that the power battery pack outputs a current voltage to the DC/DC controller 102 through the first output terminal; conversely, when the voltages applied to the base and the emitter, or the voltages applied to the gate and the source are 0 or less than a predetermined value, the circuit is not turned on, which is equivalent to the turn-off of the switch, thereby performing a switching function.
The second relay is also an electrically controlled switching device, as shown in fig. 2, when a voltage and a current are applied to the iron coil 22 through the electrode 21, the iron core 23 generates an electromagnetic attraction force, the armature switch 24 is closed, and as the switch is connected, the power battery pack 103 outputs a current and a voltage to the DC/DC controller 102 through the first output end; when the power supply to the iron coil 22 is removed, the electromagnetic attraction force disappears, and the armature switch 24 is turned off by the spring 25, which corresponds to the switch off, thereby functioning as a switch.
Optionally, the power supply circuit further includes:
and the power supply battery with the output end connected with the semiconductor metal oxide MOS tube or the second relay is used for supplying power to the semiconductor metal oxide MOS tube or the second relay.
It should be noted that, because no matter be the MOS pipe or the second relay, all need apply voltage electric current and just can realize the switch function, consequently the embodiment of the utility model provides a power supply battery is provided for switch unit 101 for realize that switch function provides voltage electric current for MOS pipe or second relay.
Optionally, the power supply battery is a lead-acid battery.
The lead-acid battery is a storage battery in which the electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. In the discharge state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in a charged state, the main components of the positive electrode and the negative electrode are lead sulfate. Lead acid batteries have the property of being hermetically sealed, in normal operation, without leakage of electrolyte from the terminals or housing of the battery. The special liquid-absorbing partition board can hold sulfuric acid solution in the interior of the battery, and the interior of the battery has no free acid liquor, so that the battery can be placed at any position. When the internal pressure of the battery exceeds a normal level, the lead-acid battery can release excessive gas and automatically reseal, so as to ensure that no excessive gas exists in the battery. And the lead-acid battery adopts a lead-calcium alloy breast board with an anti-corrosion structure, and can be used for 10-15 years by floating charge. Because the above-mentioned reliable characteristic of lead acid battery, and can provide stable control voltage electric current for switch unit 101, so as the utility model discloses the power supply battery of power supply circuit priority, of course, also can select other batteries according to particular case.
It should be further noted that, when the switch unit 101 is a second relay, the rated power of the second relay used is much smaller than the rated power of the first relay at the second output terminal of the power battery pack. Because the second output end of the power battery pack is used for supplying power to the motor to drive the electric vehicle to run, the output voltage and current are far larger than the voltage and current output by the first output end of the power battery pack to the DC/DC controller 102, and the attraction force of the first relay is required to be far larger than the attraction force of the second relay adopted by the switch unit 101, the attraction force required by the second relay adopted by the switch unit 101 is small, the voltage and current required by the attraction armature switch is small, the capacity of the lead-acid battery can be completely provided, and therefore the lead-acid battery can be used for supplying power to the second relay used as the switch unit 101.
Alternatively, as shown in fig. 3, in another embodiment of the present invention, in the power supply circuit 100, an input terminal of the power supply battery 107 is connected to an output terminal of the DC/DC controller 102.
Optionally, as shown in fig. 3, the power supply circuit 100 may further include:
a current limiting resistor 108 is installed between the input terminal of the power supply battery 107 and the output terminal of the DC/DC controller 102.
Optionally, the value of the current limiting resistor 108 is the output voltage of the DC/DC controller 102 divided by the charging current rating of the power supply battery 107.
It should be noted that, the utility model discloses a DC/DC controller 102 charges for power supply battery 107, in order to avoid occupying too big electric current to influence DC/DC controller 102 for the normal power supply of first relay 104, consequently chooses for use the less battery of charging current such as lead-acid batteries as power supply battery 107 for the power supply of switch unit 101.
Taking a lead-acid battery as an example, the supply current of the lead-acid battery used in a general electric vehicle is not more than 1.5A, and the output current of the general DC/DC controller 102 is 20A, it is obvious that a current-limiting resistor 108 is needed to reduce the charging current for charging the power supply battery 107, the output voltage of the DC/DC controller 102 can be known by searching the used DC/DC controller 102, and similarly, the rated value of the charging current of the power supply battery 107 in use is obtained, and according to a circuit formula, the resistance value of the current-limiting resistor 108 can be obtained as the rated value of the charging current of the power supply battery 107 divided by the output voltage of the DC/DC controller 102.
Optionally, the DC/DC controller is a unidirectional step-down DC/DC controller.
It should be noted that, because the utility model discloses well DC/DC controller 102 only needs the step-down function to need to prevent that the electric current from flowing backward the power battery package and causing the harm for the power battery package, consequently the utility model discloses a supply circuit adopts one-way step-down DC/DC controller.
Optionally, as shown in fig. 4, in another embodiment of the present invention, the power supply circuit further includes: the output end of the DC/DC controller 102 is connected to a peripheral device 109 of the electric vehicle, and is configured to adjust the output current of the first output end of the power battery pack to supply power to the peripheral device.
It should be noted that the peripheral devices include a lamp, a speaker, an instrument panel, etc., and since the output voltage of the power battery pack is generally 130V, and the voltage of the peripheral devices of the electric vehicle is generally 12V, the DC/DC controller is required to reduce the power supply voltage for the peripheral devices, so as to ensure the normal operation of each peripheral device of the electric vehicle.
The utility model discloses in, the output circuit of DC/DC controller 102, the output circuit that DC/DC controller 102 and DC/DC controller 102 are connected with first relay for putting in order the car peripheral equipment power supply at the place of connecting current-limiting resistor are parallelly connected, and because compare in the required voltage electric current of first relay, the charging current of power supply battery and peripheral equipment's supply current is less, can not influence the power supply work of DC/DC controller 102 to first relay.
In addition, due to the existence of the switch unit 101, the electric vehicle can charge the power supply battery in a parking state and supply power to peripheral devices of the electric vehicle, the first relay does not need to be closed, and the loss of the first relay is reduced.
It should be further noted that, because the output circuit of the DC/DC controller 102 at the position where the current-limiting resistor is connected, the output circuit of the DC/DC controller 102 supplying power to the peripheral device of the whole vehicle, and the circuit of the DC/DC controller 102 connected to the first relay are connected in parallel, three parallel circuits are not always required to be connected simultaneously, therefore, the utility model discloses can adjust and control the electric energy trend through Battery Management System (BMS), improve the electric energy utilization rate.
For example, when the user of the electric vehicle controls the electric vehicle to stop and temporarily leave for handling something, the power supply battery keeps the switch unit 101 closed due to the fact that the electric vehicle runs for a period of time, the first relay is guaranteed to be in the state that the armature switch is closed and filled, and the electric quantity of the power supply battery generates certain loss.
The embodiment of the utility model provides an among the power supply circuit of relay, specifically include: the first end of the switch unit is connected with the first output end of the power battery pack; the input end of the DC/DC controller is connected with the second end of the switch unit, and the output end of the DC/DC controller is connected with the electrode of the first relay arranged at the second output end of the power battery pack; the power supply device supplies power to the first relay through the power battery pack, the switch unit, the DC/DC controller and the first relay which are connected in sequence. The utility model discloses a DC/DC controller adjustment power battery package's output current replaces lead acid battery to supply power for first relay. Because the DC/DC controller has the characteristic of stably and continuously outputting voltage and current, the first relay can be stably and continuously supplied with power, the problem that the first relay cannot be attracted due to unstable power supply of a lead-acid battery is solved, and the normal work of the first relay is ensured.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A power supply circuit for a relay, comprising:
the first end of the switch unit is connected with the first output end of the power battery pack; the first output end of the power battery pack is connected with the second output end of the power battery pack in parallel;
the input end of the DC/DC controller is connected with the second end of the switch unit, and the output end of the DC/DC controller is connected with the electrode of a first relay arranged at the second output end of the power battery pack and used for supplying power to the first relay;
the first relay is used for controlling the opening and closing of the first output end of the power battery pack.
2. The power supply circuit according to claim 1, wherein the switching unit is a semiconductor Metal Oxide Semiconductor (MOS) transistor or a second relay.
3. The power supply circuit of claim 2, further comprising:
and the power supply battery with the output end connected with the semiconductor metal oxide MOS tube or the second relay is used for supplying power to the semiconductor metal oxide MOS tube or the second relay.
4. The power supply circuit of claim 3, wherein the power supply battery is a lead-acid battery.
5. The power supply circuit of claim 3, wherein an input of the power supply battery is connected to an output of the DC/DC controller.
6. The power supply circuit of claim 5, further comprising: and the current limiting resistor is arranged between the input end of the power supply battery and the output end of the DC/DC controller.
7. The power supply circuit of claim 6 wherein the current limiting resistor has a resistance value of the output voltage of the DC/DC controller divided by the charging current rating of the power supply battery.
8. The power supply circuit of claim 1, wherein the DC/DC controller is a unidirectional step-down DC/DC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120457011.8U CN214255810U (en) | 2021-03-03 | 2021-03-03 | Power supply circuit of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120457011.8U CN214255810U (en) | 2021-03-03 | 2021-03-03 | Power supply circuit of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214255810U true CN214255810U (en) | 2021-09-21 |
Family
ID=77727290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120457011.8U Active CN214255810U (en) | 2021-03-03 | 2021-03-03 | Power supply circuit of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214255810U (en) |
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2021
- 2021-03-03 CN CN202120457011.8U patent/CN214255810U/en active Active
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