CN219086870U - Emergency power supply module and switching device - Google Patents
Emergency power supply module and switching device Download PDFInfo
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- CN219086870U CN219086870U CN202222828970.3U CN202222828970U CN219086870U CN 219086870 U CN219086870 U CN 219086870U CN 202222828970 U CN202222828970 U CN 202222828970U CN 219086870 U CN219086870 U CN 219086870U
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Abstract
The application relates to an emergency power supply module and a switching device. The emergency power module includes: the primary side of the isolation type transformer is connected with the input end of the high-voltage battery pack, and the secondary side of the isolation type transformer is connected with the output end of the emergency power supply; the input end of the step-down controller is connected with the input end of the high-voltage battery pack through a first resistor; the grid electrode of the first switching tube is connected with the fourth resistor, the source electrode of the first switching tube is connected with the ground wire through the fifth resistor, and the drain electrode of the first switching tube is connected with a third pin on the primary side of the isolation transformer; the first pin of the photoelectric coupler is connected with the output end of the emergency power supply through a third resistor, and the fourth pin of the photoelectric coupler is connected with the reference voltage. When the storage battery fails, the storage battery is switched to an emergency power supply module to supply power for the motor control panel.
Description
Technical Field
The application relates to the technical field of power circuits, in particular to an emergency power supply module and a switching device.
Background
The current new energy electric automobile has two battery systems, one is a 100-600V high-voltage lithium battery pack, which supplies power for the driving motor of the automobile, and the other is a 12V lead storage battery, which supplies power for the motor controller. When the 12V lead storage battery fails, the motor control system loses power supply, the driving motor of the automobile can lose control, and the vehicle immediately loses power.
Disclosure of Invention
Based on this, provide an emergency power source module and auto-change over device, solve the problem that motor control system outage when battery trouble among the prior art.
In one aspect, an emergency power module is provided, including:
the primary side of the isolation type transformer is connected with the input end of the high-voltage battery pack, and the secondary side of the isolation type transformer is connected with the output end of the emergency power supply;
the input end of the step-down controller is connected with the input end of the high-voltage battery pack through a first resistor;
the grid electrode of the first switching tube is connected with a fourth resistor, the source electrode of the first switching tube is connected with a ground wire through a fifth resistor, and the drain electrode of the first switching tube is connected with a third pin on the primary side of the isolation transformer;
the first pin of the photoelectric coupler is connected with the output end of the emergency power supply through a third resistor, the second pin of the photoelectric coupler is grounded, the third pin of the photoelectric coupler is grounded through an eighth resistor, and the fourth pin of the photoelectric coupler is connected with a reference voltage.
The first pin of the isolation transformer is connected with the input end of the high-voltage battery pack, the third pin of the isolation transformer is connected with the anode of a second diode, and the cathode of the second diode is connected with a second resistor and a first capacitor in series and connected with the input end of the high-voltage battery pack;
the fourth pin of the isolation transformer is connected with the anode of a third diode, the cathode of the third diode is connected with the power pin of the step-down controller, and the fifth pin of the isolation transformer is grounded;
an eighth pin of the isolation transformer is connected with a ninth pin, and a connection point of the eighth pin and the ninth pin is grounded;
the tenth pin of isolation transformer is connected with the eleventh pin, the connection point of tenth pin and eleventh pin is connected the positive pole of first diode, the negative pole of first diode with emergency power source's output is connected.
The reference voltage pin of the step-down controller is connected with the third pin of the photoelectric coupler through a seventh resistor, the power supply pin of the step-down controller is grounded through a sixth capacitor, the feedback pin of the step-down controller is grounded through a fifth resistor, the voltage compensation pin of the step-down controller is connected with the reference voltage pin through the sixth resistor, the voltage compensation pin of the step-down controller is connected with the reference voltage pin end of the step-down controller through a seventh capacitor, the output voltage pin of the step-down controller is connected with the grid electrode of the second diode through a fourth resistor, and the grounding pin of the step-down controller is connected with the ground wire.
In another aspect, there is provided a switching device for an emergency power supply, the device comprising:
the input end of the emergency power supply module is connected with the input end of the high-voltage battery pack;
the power supply switching module is connected with the emergency power supply module;
the micro control module comprises a micro control unit, and the micro control unit is connected with the power supply switching module;
the storage battery module is connected with the power supply detection module;
the high-voltage battery pack is connected with the emergency power supply module.
In one embodiment, the emergency power switching device further comprises a fault detection module,
one end of the fault detection module is connected with the storage battery module, and the other end of the fault detection module is connected with the micro-control unit of the motor control board.
In another embodiment, the emergency power supply switching device further comprises a power supply management module, one end of the power supply management module is connected with the power supply switching module, and the other end of the power supply management module is connected with the micro-control unit of the motor control board.
In another embodiment, the high-voltage battery is connected with a driving motor of the vehicle through an IGBT module for controlling on-off of a circuit.
In another embodiment, the device further comprises a signal isolation module, wherein one end of the signal isolation module is connected with the micro control unit, and the other end of the signal isolation module is connected with the IGBT module.
The fault detection module includes:
one end of the eighth capacitor is connected with the acquisition input end of the micro control unit, and the other end of the eighth capacitor is connected with the ground wire;
a ninth resistor, one end of which is connected with the input end of the storage battery, and the other end of which is connected with the eleventh resistor;
an eleventh resistor, one end of which is connected with the ninth resistor, and the other end of which is connected with the ground wire;
and one end of the tenth resistor is connected with the signal acquisition end of the micro control unit, and the other end of the tenth resistor is connected with the leading-out point at the connection part of the ninth resistor and the eleventh resistor.
The power supply switching module includes:
the anode of the fourth diode is connected with the storage battery module, and the cathode of the fourth diode is connected with the power input end of the motor control board;
the anode of the fifth diode is connected with the drain electrode of the second switch tube, and the cathode of the fifth diode is connected with the power input end of the motor control board;
the second switching tube is a PMOS tube, a source electrode of the second switching tube is connected with the output end of the emergency power supply, a drain electrode of the second switching tube is connected with the anode of the fifth diode, and a grid electrode of the second switching tube is connected with the micro-control unit.
The emergency power supply switching device applied to the motor board detects the working state of the 12V lead storage battery in real time through the fault detection module, divides the 12V voltage to the range which can be acquired by the micro control unit, and transmits information to the digital-analog conversion port of the micro control unit after filtering. The micro control unit analyzes the collected signals, when the 12V storage battery is judged to be faulty, the micro control unit controls the power supply switching module to switch the power supply into the emergency power supply module, and the situation that the automobile driving motor is out of control due to the fact that the motor control board is out of control when the 12V storage battery is faulty is avoided.
Drawings
FIG. 1 is a schematic diagram of an emergency power switching device applied to a motor control board;
FIG. 2 is a circuit diagram of an emergency power switching module in one embodiment;
FIG. 3 is a circuit diagram of a power switching module in another embodiment;
FIG. 4 is a circuit diagram of a 12V fault detection module in one embodiment.
The reference numerals are as follows:
t1 and isolation type transformer
U1 and buck controller
U2 photoelectric coupler
Q1, first switch tube
Q2, second switch tube
D1, first diode
D2, second diode
D3, third diode
D4, fourth diode
D5, fifth diode
R1, first resistor
R2, second resistor
R3, third resistor
R4, fourth resistor
R5, fifth resistor
R6, sixth resistor
R7, seventh resistor
R8, eighth resistor
R9, ninth resistor
R10, tenth resistor
R11, eleventh resistor
C1, first capacitor
C2, second capacitor
C3, third capacitor
C4, fourth capacitor
C5, fifth capacitor
C6, sixth capacitor
C7, seventh capacitor
C8, eighth capacitor
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims.
References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Currently, new energy electric vehicles have two battery systems, a high-voltage battery pack for respectively powering a driving motor, and a 12V lead storage battery for controlling a motor control board. When the 12V storage battery fails, the motor control board for controlling the driving motor loses power and causes the vehicle to lose power, and an emergency power supply module is designed for the vehicle, as shown in fig. 1, and comprises:
the primary side of the isolation transformer T1 is connected with the input end of the high-voltage battery pack, and the secondary side of the isolation transformer T1 is connected with the output end of the emergency power supply.
The first pin of the isolation transformer T1 is connected with the input end of the high-voltage battery pack, the third pin of the isolation transformer T1 is connected with the anode of the second diode D2, and the cathode of the second diode D2 is connected with the second resistor and the first capacitor in series and connected with the input end of the high-voltage battery pack;
as shown in fig. 2, when the first switching tube Q1 is turned on, the winding coils of the pin 1 and the pin 3 on the primary side of the isolation transformer T1 are turned on, wherein the pin 3 is the positive electrode, and the fifth resistor R5 plays a role of limiting the primary side circuit current too much.
When the first switching tube Q1 is turned off, the first capacitor C1, the second resistor R2, and the second diode D2 form a loop.
The fourth pin of the isolation transformer T1 is connected with the anode of the third diode D3, the cathode of the third diode D3 is connected with the power pin of the step-down controller, and the fifth pin of the isolation transformer T1 is grounded.
The input end of the high-voltage battery pack is connected with the cathode of a third diode D3 through a first resistor R1, and the anode of the third diode is connected with a pin 4 of the isolation transformer T1.
When the switch tube is switched on and off, two groups of winding coils on the primary side of the isolation transformer T1 respectively generate voltages with opposite polarities and opposite magnitudes, and the two groups of coils generate induced electromotive force in a mutual inductance mode and enter the secondary side of the isolation transformer T1.
An eighth pin of the isolation transformer T1 is connected with a ninth pin, and a connection point of the eighth pin and the ninth pin is grounded.
The tenth pin and the eleventh pin of isolation transformer T1 are connected, the positive pole of first diode is connected to the tie point of tenth pin and eleventh pin, the negative pole of first diode with emergency power source's output is connected.
The induced electromotive force is an ac signal, and due to the unidirectional conductivity of the first diode D1, only a current flowing from the pin 10 of the isolation transformer T1 to the first diode D1 can pass, so that the output end of the emergency power supply has a forward electromotive force.
As shown in fig. 2, when the resistance of the first resistor R1 and the resistance of the fifth resistor R5 are adjusted according to the input of the high-voltage battery pack so that the voltage of the pin 3 of the isolation transformer T1 is 20V, the voltage at the output end of the emergency power supply is 12V.
And the input end of the step-down controller U1 is connected with the input end of the high-voltage battery pack through a first resistor.
The reference voltage pin of the step-down controller U1 is connected with the third pin of the photoelectric coupler U2 through a seventh resistor R7, the power pin of the step-down controller is grounded through a sixth capacitor C6, the feedback pin of the step-down controller is grounded through a fifth resistor, the voltage compensation pin of the step-down controller is connected with the reference voltage pin through a sixth resistor R6, the voltage compensation pin of the step-down controller is connected with the reference voltage pin end of the step-down controller through a seventh capacitor C7, the output voltage pin of the step-down controller is connected with the grid electrode of the second diode D2 through a fourth resistor R4, and the grounding pin of the step-down controller U1 is connected with the ground wire.
Illustratively, the pin 1 of the buck controller U1 is a voltage compensation pin for voltage compensation of the buck controller U1, wherein the seventh capacitor C7 is used for filtering.
And a pin 2 of the voltage reduction controller U1 is a current feedback pin, when the first switching tube is conducted, the current of the high-voltage battery pack is divided into two paths after passing through the source electrode of the first switching tube, one path flows to the fifth resistor R5, and the other path flows to the pin 2 of the voltage reduction controller U1.
The pin 6 of the buck controller U1 is an output pin, when the pin 6 is at a high level, the first switching tube is turned on, and otherwise, the first switching tube is turned off.
The pin 7 of the voltage reduction controller U1 is a power supply pin, the pin 7 is connected with the input end of the high-voltage battery pack through a first resistor R1, and is grounded through a sixth capacitor C6, wherein the sixth capacitor C6 is used for filtering, and the pin 7 is connected with a power supply for supplying power to the voltage reduction controller U1.
The pin 8 of the buck controller U1 is a reference voltage pin, and provides a reference voltage for a voltage comparator inside the buck controller U1.
The first switching tube Q1, the first switching tube Q1 is the NMOS tube, the grid of first switching tube Q1 is connected with fourth resistance R4, the source of first switching tube Q1 is connected with ground connection through fifth resistance R5, the drain electrode of first switching tube Q1 with the third pin of isolated transformer T1's primary side is connected.
Because the first switching tube Q1 is an NMOS tube, the output terminal pin 6 of the buck controller U1 is connected to the gate of the first switching tube Q1, when the output of the buck controller U1 is at a high level, an electric field is formed near the gate of the first switching tube Q1, and electrons in the doped region are attracted, so that an N-channel is formed between the drain and the source of the first switching tube Q1, and the drain and the source are conducted. The high-voltage battery pack is connected with the ground wire through a fifth resistor R5 through a first pin and a third pin of the primary side of the isolation transformer T1.
The photoelectric coupler U2, the first pin of photoelectric coupler U2 is connected with emergency power supply's output through third resistance R3, photoelectric coupler U2's second pin earth connection, photoelectric coupler U2's third pin passes through eighth resistance R8 earth connection, photoelectric coupler U2's fourth pin connects reference voltage VREF.
The photo coupler U2 is composed of two parts, namely a light emitting source and a light receiver, in one embodiment of the present utility model, the light emitting source of the photo coupler U2 is a light emitting diode, the light emitting source is an input end of the photo coupler U2, the light receiver of the photo coupler U2 is a phototransistor, the phototransistor is an output end of the photo coupler U2, and the light emitting diode and the phototransistor are installed in the same opaque housing, thereby forming the photo coupler U2.
A phototransistor is a transistor with three electrodes, the base of which is not extracted. When the illumination intensity changes, the resistance between the electrodes changes. The phototriode can control the current of the collector according to the illumination intensity, so that the phototriode is in different working states, and only the collector and the emitter are led out of the phototriode, and the base is used as a light receiving window.
When the output end of the emergency power supply has 12V potential, the light emitting diode is conducted forward, and the light emitting diode emits light. The phototriode receives light, and the collector and the emitter of the phototriode are conducted. And a pin 3 of the light emitting triode is grounded through an eighth resistor R8.
The eighth resistor R8 is a pull-down resistor, and is configured to reduce the potential at the pin 3. The potential of the pin 3 of the light emitting triode can be 0 due to the existence of the eighth resistor R8, but can be divided into other non-0 potentials.
According to the emergency power supply module, the direct-current voltage of the 100-600V high-voltage battery pack is reduced through the isolation transformer T1, voltage stabilization is achieved through the voltage reduction controller U1, on-off of a control circuit is achieved through the photoelectric coupler U2 and the first switching tube Q1, and in addition, a photosensitive diode in the photoelectric coupler U2 has an indicator lamp function. The effect of directly converting the voltage of the high-voltage battery pack of the vehicle into stable 12V direct current is achieved, and the direct current power supply device is used for temporarily supplying power to the motor control board when the lead storage battery fails.
In one embodiment, the output end of the emergency power supply is connected with the positive electrode of the third capacitor C3, the third capacitor C3 is an electrolytic capacitor, and the negative electrode of the third capacitor C3 is grounded. The third capacitor C3 may be a filter capacitor, and may be an aluminum electrolytic capacitor, for example, to filter out high-frequency signals entering the output end of the emergency power supply.
In one embodiment, an emergency power supply switching device is provided, comprising:
the input end of the emergency power supply module is connected with the input end of the high-voltage battery pack;
and the power supply switching module is connected with the emergency power supply module. The power supply diode module comprises a fourth diode D4, the anode of the fourth diode D4 is connected with the storage battery module, and the cathode of the fourth diode D4 is connected with the power input end of the motor control board; due to unidirectional conductivity of the diode, the fourth diode D4 may block current flowing to the 12V battery when the emergency power supply supplies power to the motor control board, for protecting the 12V battery.
A fifth diode D5, wherein the anode of the fifth diode D5 is connected with the drain electrode of the second switching tube Q2, and the cathode is connected with the power input end of the motor control board; due to unidirectional conductivity of the diodes, the fifth diode D5 can only block current flowing to the emergency power supply when the 12V battery supplies power to the motor control board by current flowing from the emergency power supply output end to the power supply input end of the motor control board, so as to protect the emergency power supply module.
The second switching tube Q2 is a PMOS tube, a source electrode of the second switching tube Q2 is connected with the output end of the emergency power supply, a drain electrode of the second switching tube Q2 is connected with an anode of the fifth diode D5, and a grid electrode of the second switching tube Q2 is connected with the micro-control unit.
Because the second switching tube Q2 is a PMOS tube, when the micro control unit applies a low level to the gate of the second switching tube Q2, the insulating layer of the gate forms an electric field, repels electrons, and forms a P channel between the two P electrodes of the second switching tube Q2, the source and the drain of the second switching tube Q2 are turned on, that is, the output end of the emergency power supply is connected with the power input end of the motor control board through the anode of the fifth diode D5, and the cathode of the emergency power supply flows through the fifth diode D5. At this time, the power supply of the motor control board is switched to an emergency power supply. When the direction of the output current of the emergency power supply is opposite to the direction of the passable current of the fourth diode D4, the current of the emergency power supply cannot flow to the 12V storage battery due to the unidirectional conduction characteristic of the diode, and at the moment, the power supply of the motor control board is switched into the emergency power supply.
When the micro control unit applies a high level to the grid electrode of the second switching tube Q2, the source electrode and the drain electrode of the second switching tube Q2 are in an off state, the output end of the emergency power supply is disconnected from the input end of the motor control board, and the second switching tube Q2 plays a role in switching.
The micro control module comprises a micro control unit, wherein the micro control unit is connected with the power supply switching module, is a 'brain' of the motor control board, is used for controlling the work of each module of the motor control board, and is communicated with a vehicle body control module of a vehicle through a CAN bus. When the 12V storage battery fails, the failure detection module transmits the filtered voltage signal to the micro control unit, the micro control unit controls the power supply switching module to switch the power supply from the 12V storage battery to the emergency power supply switching module, and the micro control unit continuously controls the high-voltage battery pack to supply power to the driving motor and sends a signal to the vehicle body control unit through CAN bus communication.
The storage battery module is connected with the power supply detection module; the storage battery module is a lead storage battery with rated voltage of 12V, and can provide direct-current voltage of 12V for the motor control panel. When the vehicle is started, the electric energy required by the electric equipment in the vehicle is provided by the storage battery.
The high-voltage battery pack is connected with the emergency power supply module. The high-voltage battery is used for supplying power to the driving motor and is a power source of the whole vehicle. When the lead storage battery fails, the high-voltage battery pack also supplies power to the motor control panel through the emergency power supply module. The input end of the high-voltage battery pack is connected with the second capacitor C2 and is grounded after being connected with the fourth capacitor C4. The second capacitor C2 and the fourth capacitor C4 have the functions of filtering and storing energy when the high-voltage battery pack is prevented from being suddenly powered off.
In another embodiment, as shown in fig. 4, the power switching device of the motor control board further includes a 12V fault detection module, one end of the fault detection module is connected with the storage battery module, and the other end is connected with the micro control unit of the motor control board. When the 12V storage battery supplies power normally, the signals collected by the micro-control unit are high-level signals, when the storage battery fails, the signals collected by the micro-control unit are low-level, as shown in fig. 3, the pin 4 of the second switch Q2 is low-level, the second switch tube Q2 is conducted, and the power supply is switched to the emergency power supply module.
In another embodiment, the emergency power supply switching device further comprises a power supply management module, one end of the power supply management module is connected with the power supply switching module, and the other end of the power supply management module is connected with the micro-control unit of the motor control board. The power management module is used for safety isolation, short circuit protection, overvoltage protection and the like.
The device also comprises a signal isolation module, one end of the signal isolation module is connected with the micro control unit, and the other end of the signal isolation module is connected with the IGBT module. Because the driving motor is powered by high voltage of the high-voltage battery pack, the micro-control unit belongs to a low-voltage device. In order to avoid the mutual influence of high-voltage and low-voltage circuits, a signal isolation module is provided, a micro control unit is isolated from a driving motor, and the voltage and the current of a driving motor circuit are prevented from influencing the micro control unit of a motor control board, so that the control of the driving motor is prevented.
In one embodiment, the IGBT module is an inverter, which is a dc-ac transformer, that converts the dc power of the high voltage battery pack into the high voltage ac power required to drive the motor. And a 12V low-voltage circuit of the motor control board and a high-voltage circuit of the driving motor are isolated, so that the low-voltage high-voltage circuit is prevented from being affected mutually.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. An emergency power module, the emergency power module comprising:
the primary side of the isolation type transformer is connected with the input end of the high-voltage battery pack, and the secondary side of the isolation type transformer is connected with the output end of the emergency power supply;
the input end of the step-down controller is connected with the input end of the high-voltage battery pack through a first resistor;
the grid electrode of the first switching tube is connected with a fourth resistor, the source electrode of the first switching tube is connected with a ground wire through a fifth resistor, and the drain electrode of the first switching tube is connected with a third pin on the primary side of the isolation transformer;
the first pin of the photoelectric coupler is connected with the output end of the emergency power supply through a third resistor, the second pin of the photoelectric coupler is grounded, the third pin of the photoelectric coupler is grounded through an eighth resistor, and the fourth pin of the photoelectric coupler is connected with a reference voltage.
2. The emergency power module of claim 1, wherein a first pin of the isolation transformer is connected to an input of the high voltage battery pack, a third pin of the isolation transformer is connected to an anode of a second diode, and a cathode of the second diode is connected in series with a second resistor and a first capacitor to an input of the high voltage battery pack;
the fourth pin of the isolation transformer is connected with the anode of a third diode, the cathode of the third diode is connected with the power pin of the step-down controller, and the fifth pin of the isolation transformer is grounded;
an eighth pin of the isolation transformer is connected with a ninth pin, and a connection point of the eighth pin and the ninth pin is grounded;
the tenth pin of isolation transformer is connected with the eleventh pin, tenth pin with eleventh pin draw forth the positive pole that the point connects first diode, the negative pole of first diode with emergency power source's output is connected.
3. The emergency power supply module according to claim 1, wherein a reference voltage pin of the buck controller is connected with a third pin of the photocoupler through a seventh resistor, a power supply pin of the buck controller is grounded through a sixth capacitor, a feedback pin of the buck controller is grounded through a fifth resistor, a voltage compensation pin of the buck controller is connected with the reference voltage pin through a sixth resistor, a voltage compensation pin of the buck controller is connected with a reference voltage pin end of the buck controller through a seventh resistor, an output voltage pin of the buck controller is connected with a gate electrode of the second diode through a fourth resistor, and a ground pin of the buck controller is connected with a ground wire.
4. An emergency power supply switching device is applied to the motor control panel, and is characterized in that, the emergency power supply switching device includes:
an emergency power module according to any one of claims 1-3, the input of the emergency power module being connected to the input of a high voltage battery pack;
the power supply switching module is connected with the emergency power supply module;
the micro control module comprises a micro control unit, and the micro control unit is connected with the power supply switching module;
the storage battery module is connected with the power supply detection module;
the high-voltage battery pack is connected with the emergency power supply module.
5. The device of claim 4, wherein the emergency power supply switching device further comprises a fault detection module, one end of the fault detection module is connected with the storage battery module, and the other end of the fault detection module is connected with a micro control unit of a motor control board.
6. The device of claim 4, wherein the emergency power switching device further comprises a power management module, one end of the power management module is connected to the power switching module, and the other end is connected to a micro control unit of a motor control board.
7. The apparatus of claim 4, wherein the high voltage battery is connected to a driving motor of the vehicle through an IGBT module for controlling on-off of a circuit.
8. The device of claim 4, further comprising a signal isolation module having one end connected to the micro control unit and the other end connected to the IGBT module.
9. The apparatus of claim 5, wherein the fault detection module comprises:
one end of the eighth capacitor is connected with the acquisition input end of the micro control unit, and the other end of the eighth capacitor is connected with the ground wire;
a ninth resistor, one end of which is connected with the input end of the storage battery, and the other end of which is connected with the eleventh resistor;
an eleventh resistor, one end of which is connected with the ninth resistor, and the other end of which is connected with the ground wire;
and one end of the tenth resistor is connected with the signal acquisition end of the micro control unit, and the other end of the tenth resistor is connected with the leading-out point at the connection part of the ninth resistor and the eleventh resistor.
10. The apparatus according to any one of claims 4 or 6, wherein the power supply switching module comprises:
the anode of the fourth diode is connected with the storage battery module, and the cathode of the fourth diode is connected with the power input end of the motor control board;
the anode of the fifth diode is connected with the drain electrode of the second switch tube, and the cathode of the fifth diode is connected with the power input end of the motor control board;
the second switching tube is a PMOS tube, a source electrode of the second switching tube is connected with the output end of the emergency power supply, a drain electrode of the second switching tube is connected with the anode of the fifth diode, and a grid electrode of the second switching tube is connected with the micro-control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222828970.3U CN219086870U (en) | 2022-10-26 | 2022-10-26 | Emergency power supply module and switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222828970.3U CN219086870U (en) | 2022-10-26 | 2022-10-26 | Emergency power supply module and switching device |
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| CN219086870U true CN219086870U (en) | 2023-05-26 |
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| CN202222828970.3U Active CN219086870U (en) | 2022-10-26 | 2022-10-26 | Emergency power supply module and switching device |
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| CN (1) | CN219086870U (en) |
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