CN215956303U - Arc extinguishing circuit of high-voltage battery group switch-on machine - Google Patents
Arc extinguishing circuit of high-voltage battery group switch-on machine Download PDFInfo
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- CN215956303U CN215956303U CN202122485414.6U CN202122485414U CN215956303U CN 215956303 U CN215956303 U CN 215956303U CN 202122485414 U CN202122485414 U CN 202122485414U CN 215956303 U CN215956303 U CN 215956303U
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Abstract
The utility model discloses an arc extinguishing circuit of a high-voltage battery assembly electrified motor, and relates to the technical field of arc extinguishing of high-voltage motors. The high-voltage battery recovery circuit comprises an RC circuit, a starting control circuit and a recovery control circuit, wherein the RC circuit is connected between a high-voltage battery pack and a motor controller, and is used for acquiring the voltage at two ends of a capacitor in the RC circuit by setting a balance load resistor and controlling the recovery control circuit; the starting control circuit acquires a signal on the starting control module and controls the RC circuit to be switched on and off through the electromagnetic relay; the recovery control circuit shields a starting resistor R1 in the RC circuit, so that the high-voltage battery pack is directly conducted with the motor controller. According to the utility model, the delay characteristic of the voltage at two ends of the RC loop capacitor is utilized, so that the voltage loading process of the motor controller is delayed, and the problem of electric sparks caused by instant connection of high voltage is avoided; and the cost is low, the logic control is simple, and the electric spark arc extinction is effectively realized from the electric spark generation source.
Description
Technical Field
The utility model belongs to the technical field of arc extinction of high-voltage motors, and particularly relates to an arc extinction circuit of a high-voltage battery assembly electrified motor.
Background
The battery pack serving as a power source in the pure electric vehicle has the characteristics of high voltage, high capacity and high cost. At the moment when the battery pack is connected with the motor, electric sparks are easily caused due to the high-voltage instant loading, and certain potential safety hazards are caused. At present, the common solution to the problem is to eliminate the influence of the electric spark through a form such as physical separation after the electric spark is generated, and although the influence of the electric spark is solved to a certain extent, equipment needs to be added to the part where the electric spark is generated, so that the overall process requirement of the product is increased, the cost of opening and loading the die is increased, and the production cost of the product is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an arc extinguishing circuit of a high-voltage battery assembly switch-on motor, which solves the problem of high production cost caused by the fact that the existing electric spark solving means uses physical isolation and is not eliminated from the source of electric spark generation.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model relates to an arc extinguishing circuit of a high-voltage battery assembly electrifying motor, which is used for delaying the electrifying process between a high-voltage battery pack and a motor controller in an electric automobile driving circuit, and the arc extinguishing circuit is powered by a low-voltage power module and a starting control module in the electric automobile driving circuit and provides a starting control signal, and comprises:
the RC circuit is used for delaying the electrifying process between the high-voltage battery pack and the motor controller, and comprises a starting resistor R1 and a capacitor C1 which are connected in series, the RC circuit and the high-voltage battery pack form a loop, the motor controller is connected to two ends of the capacitor C1, and the voltage of two ends of the capacitor C1 is obtained;
the starting control circuit comprises a starting switch and a starting electromagnetic relay K2, the starting electromagnetic relay K2 comprises two coil pins and two switch pins, the two coil pins and the starting switch are connected in series and then form a loop with the low-voltage power supply module, and the two switch pins are connected between the RC circuit and the high-voltage battery pack to control the on-off of the RC circuit;
the starting switch is a triode, a collector and an emitter of the triode are connected to a loop of the low-voltage power supply module, and a base is connected with the starting control module.
The starting switch can also be an MOS tube, the source electrode and the drain electrode of the MOS tube are connected to the loop of the low-voltage power supply module, and the grid electrode of the MOS tube is connected with the starting control module.
The starting control module controls the closing of the starting electromagnetic relay K2 on the loop by controlling the on-off of the triode or the MOS, and further controls the RC circuit connected with the high-voltage battery pack to work.
The recovery control circuit comprises a recovery switch, a recovery electromagnetic relay K1 and series-connected balance resistors R2 and R3; two ends of the series-connected balance resistors R2 and R3 are connected with two ends of the capacitor C1, and the recovery switch is connected between the balance resistors R2 and R3 and used for obtaining the voltage at two ends of the balance resistor R3; the recovery electromagnetic relay K1 also comprises two coil pins and two switch pins, two ends of the two switch pins are respectively connected to two ends of the starting resistor R1, and the two coil pins and the recovery switch are connected in series and then form a loop with the low-voltage power supply module.
The recovery switch is a triode, the collector and the emitter of the triode are connected with the loop of the low-voltage power supply module, and the base is connected between the balancing resistors R2 and R3.
The recovery switch can also be an MOS (metal oxide semiconductor) tube, the source electrode and the drain electrode of the MOS tube are connected to the loop of the low-voltage power supply module, and the grid electrode obtains the voltage on the balance resistor R3.
When the voltage on the balance resistor R3 reaches the conduction voltage, the loop where the recovery switch is located is communicated, the recovery electromagnetic relay K1 connected to the loop is closed at the moment, the starting resistor R1 is shielded, and the high-voltage battery pack is directly communicated with the motor controller to complete the whole conduction process.
And a load resistor R4 is also connected between the base of the recovery switch and the balancing resistor R3.
And a voltage stabilizing element is also connected to the balancing resistor R3, and the voltage stabilizing element is a voltage stabilizing diode.
The utility model has the following beneficial effects:
according to the utility model, the voltage loading process of the motor controller is delayed by utilizing the delay characteristic of the voltage at two ends of the RC loop capacitor, so that the problem of electric sparks caused by instant connection of high voltage is avoided; the starting control module is sent by a simple starting signal, all circuits can be controlled under the action of the electromagnetic relay and the triode, the cost is low, the logic control is simple, and the electric spark arc extinction is effectively realized from an electric spark generating source.
Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a circuit diagram of the arc extinguishing device of the present invention connected to a high voltage resistor and a motor controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention is an arc extinguishing circuit for a high voltage battery set to connect a motor, the arc extinguishing circuit is used to delay the connection process between a high voltage battery set and a motor controller in a driving circuit of an electric vehicle, and the arc extinguishing circuit is powered by a low voltage power module and a start control module in the driving circuit of the electric vehicle and provides a start control signal, the arc extinguishing circuit includes:
the RC circuit is used for delaying the electrifying process between the high-voltage battery pack and the motor controller, and comprises a starting resistor R1 and a capacitor C1 which are connected in series, the RC circuit and the high-voltage battery pack form a loop, the motor controller is connected to two ends of the capacitor C1, and the voltage of two ends of the capacitor C1 is obtained;
the starting control circuit comprises a starting switch and a starting electromagnetic relay K2, the starting electromagnetic relay K2 comprises two coil pins and two switch pins, the two coil pins and the starting switch are connected in series and then form a loop with the low-voltage power supply module, and the two switch pins are connected between the RC circuit and the high-voltage battery pack to control the on-off of the RC circuit;
the starting switch is a triode, the collector and the emitter of the triode are connected to the loop of the low-voltage power supply module, and the base is connected with the starting control module.
The starting switch can also be an MOS tube, the source electrode and the drain electrode of the MOS tube are connected on the loop of the low-voltage power supply module, and the grid electrode of the MOS tube is connected with the starting control module.
The starting control module controls the closing of the starting electromagnetic relay K2 on the loop by controlling the on-off of the triode or the MOS, and further controls the RC circuit connected with the high-voltage battery pack to work.
The recovery control circuit comprises a recovery switch, a recovery electromagnetic relay K1 and series-connected balance resistors R2 and R3; two ends of the series-connected balance resistors R2 and R3 are connected with two ends of the capacitor C1, and the recovery switch is connected between the balance resistors R2 and R3 and used for obtaining the voltage at two ends of the balance resistor R3; the recovery electromagnetic relay K1 also comprises two coil pins and two switch pins, two ends of the two switch pins are respectively connected with two ends of the starting resistor R1, and the two coil pins and the recovery switch are connected in series and then form a loop with the low-voltage power supply module.
The recovery switch is a triode, the collector and the emitter of the triode are connected with the loop of the low-voltage power supply module, and the base is connected between the balance resistors R2 and R3.
The recovery switch can also be an MOS tube, the source electrode and the drain electrode of the MOS tube are connected on the loop of the low-voltage power supply module, and the grid electrode obtains the voltage on the balance resistor R3.
And a load resistor R4 is also connected between the base of the recovery switch and the balancing resistor R3.
The balancing resistor R3 is also connected with a voltage stabilizing element which is a voltage stabilizing diode.
When the voltage on the balance resistor R3 reaches the conduction voltage, the loop where the recovery switch is located is communicated, the recovery electromagnetic relay K1 connected to the loop is closed at the moment, the starting resistor R1 is shielded, and the high-voltage battery pack is directly communicated with the motor controller to complete the whole conduction process.
Example (b):
the starting switch and the recovery switch are both NPN triodes as examples, when the starting control module receives a switch-on command, the base voltage of the starting switch Q1 is pulled up, when the base voltage of the starting switch Q1 reaches the conducting voltage of the triodes, the electromagnetic relay K2 is started to be powered on, the switch is closed, at the moment, an RC circuit connected between the high-voltage battery combined motor controller is conducted, the voltage at two ends of the capacitor C1 gradually rises, the voltages on the balance resistors R2 and R3 are the voltages at two ends of the capacitor C1, therefore, the voltages on the balance resistors R2 and R3 also gradually rise, and the time that the voltage on the balance resistor R3 reaches the conducting voltage of the recovery switch Q2 can be controlled by setting the proportion of the balance resistors R2 and R3;
when the voltage of the balance resistor R3 reaches the conduction voltage of the recovery switch Q2, the recovery switch Q2 is conducted, the recovery electromagnetic relay K1 on the loop is conducted, the switch is closed, at the moment, the starting resistor R1 is shielded, the high-voltage battery pack is directly conducted with the motor controller, and the motor controller after being connected enters a normal working state.
According to the embodiment, the voltage loading process of the motor controller is delayed by utilizing the delay characteristic of the voltage at two ends of the RC loop capacitor, so that the problem of electric sparks caused by instant connection of high voltage is avoided. The starting control module is sent by a simple starting signal, all circuits can be controlled under the action of the electromagnetic relay and the triode, the cost is low, the logic control is simple, and the electric spark arc extinction is effectively realized from an electric spark generating source.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides an arc extinguishing circuit of high voltage battery group circular telegram machine, arc extinguishing circuit be used for delaying the circular telegram process between high voltage battery group and the machine controller in the electric automobile drive circuit, and arc extinguishing circuit by the low voltage power module among the electric automobile drive circuit with start control module power supply and provide start control signal, its characterized in that: the arc extinguishing circuit comprises:
the RC circuit is used for delaying the electrifying process between the high-voltage battery pack and the motor controller, and comprises a starting resistor R1 and a capacitor C1 which are connected in series, the RC circuit and the high-voltage battery pack form a loop, the motor controller is connected to two ends of the capacitor C1, and the voltage of two ends of the capacitor C1 is obtained;
the starting control circuit comprises a starting switch and a starting electromagnetic relay K2, the starting electromagnetic relay K2 comprises two coil pins and two switch pins, the two coil pins and the starting switch are connected in series and then form a loop with the low-voltage power supply module, and the two switch pins are connected between the RC circuit and the high-voltage battery pack to control the on-off of the RC circuit;
the recovery control circuit comprises a recovery switch, a recovery electromagnetic relay K1 and series-connected balance resistors R2 and R3; two ends of the series-connected balance resistors R2 and R3 are connected with two ends of the capacitor C1, and the recovery switch is connected between the balance resistors R2 and R3 and used for obtaining the voltage at two ends of the balance resistor R3; the recovery electromagnetic relay K1 also comprises two coil pins and two switch pins, two ends of the two switch pins are respectively connected to two ends of the starting resistor R1, and the two coil pins and the recovery switch are connected in series and then form a loop with the low-voltage power supply module.
2. The arc extinguishing circuit of claim 1, wherein the start switch is a transistor having a collector and an emitter connected to the low voltage power module, and a base connected to the start control module.
3. The arc extinguishing circuit of claim 1, wherein the recovery switch is a transistor having a collector and an emitter connected to the low voltage power module loop and a base connected between the balancing resistors R2 and R3.
4. The arc extinguishing circuit of claim 3, wherein a load resistor R4 is further connected between the base of the recovery switch and the balancing resistor R3.
5. The arc extinguishing circuit of claim 4, wherein the balancing resistor R3 further comprises a voltage regulator.
6. The arc extinguishing circuit of claim 5, wherein the voltage regulator component is a zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122485414.6U CN215956303U (en) | 2021-10-15 | 2021-10-15 | Arc extinguishing circuit of high-voltage battery group switch-on machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122485414.6U CN215956303U (en) | 2021-10-15 | 2021-10-15 | Arc extinguishing circuit of high-voltage battery group switch-on machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215956303U true CN215956303U (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122485414.6U Active CN215956303U (en) | 2021-10-15 | 2021-10-15 | Arc extinguishing circuit of high-voltage battery group switch-on machine |
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| Country | Link |
|---|---|
| CN (1) | CN215956303U (en) |
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2021
- 2021-10-15 CN CN202122485414.6U patent/CN215956303U/en active Active
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Address after: 401121 No.60, middle section of Huangshan Avenue, new North District, Chongqing Patentee after: Chongqing Military Industry Group Co.,Ltd. Address before: 401121 No.60, middle section of Huangshan Avenue, new North District, Chongqing Patentee before: CHONGQING MILITARY INDUSTRY GROUP Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 401121 No.60, middle section of Huangshan Avenue, Yubei District, Chongqing Patentee after: Chongqing Military Industry Group Co.,Ltd. Address before: 401121 No.60, middle section of Huangshan Avenue, new North District, Chongqing Patentee before: Chongqing Military Industry Group Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |