CN210297338U - Switching device for vehicle-mounted high-voltage direct-current power supply - Google Patents
Switching device for vehicle-mounted high-voltage direct-current power supply Download PDFInfo
- Publication number
- CN210297338U CN210297338U CN201920935950.1U CN201920935950U CN210297338U CN 210297338 U CN210297338 U CN 210297338U CN 201920935950 U CN201920935950 U CN 201920935950U CN 210297338 U CN210297338 U CN 210297338U
- Authority
- CN
- China
- Prior art keywords
- voltage
- power supply
- vehicle
- rectifier bridge
- current power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a auto-change over device for on-vehicle high voltage direct current power supply, a serial communication port, this auto-change over device includes the main control unit, the three-phase rectifier bridge, first diode, the second diode, high voltage battery, high voltage capacitance, first high voltage switch and first resistance, the main control unit connects the three-phase rectifier bridge, on-vehicle high voltage direct current power supply and first high voltage switch, three-phase commercial power is connected to the power end of three-phase rectifier bridge, the negative pole of first diode is connected to the positive end of three-phase rectifier bridge, the positive end of on-vehicle high voltage direct current power supply is connected to the positive pole of first diode, through first high voltage switch and high voltage battery series connection between the positive end of three-phase rectifier bridge and the negative end of on-vehicle high voltage direct current power supply, still be connected with series connection high voltage capacitance after parallelly connected through first resistance and second diode between the positive end of three-phase rectifier bridge and the negative end of on-vehicle high voltage direct The problem of power supply breakpoints exists in the switching process.
Description
Technical Field
The utility model belongs to the high voltage power supply field, concretely relates to a auto-change over device for on-vehicle high voltage dc power supply.
Background
The uninterruptible power supply is equipment which uninterruptedly provides backup power supply for load equipment of the electrical appliance under the condition of abnormal power grid (such as power failure and undervoltage) and maintains the normal operation of the electrical appliance. Generally, an uninterruptible power supply requires a power circuit switching device (i.e., a Transfer switch) for switching a load line from one power source to another power source, thereby realizing uninterrupted switching of the power sources.
At present, for vehicle-mounted electric equipment, because most of the vehicle-mounted electric equipment uses low-voltage power supply, a storage battery can be directly connected on a power bus in parallel to realize uninterrupted switching of a power supply. However, for high-voltage vehicle-mounted electric equipment, the vehicle-mounted electric equipment adopts a high-voltage battery loop to realize uninterrupted switching of a power supply, and the long-term parallel connection of the high-voltage battery on a high-voltage power supply bus can greatly shorten the service life of the high-voltage battery, so that the vehicle-mounted high-voltage power supply requirement cannot be met by adopting a mode that the battery is directly connected on the power supply bus in parallel, and certain domestic uninterrupted switching devices of the high-voltage power supply have complex circuits and large volumes and cannot meet the vehicle-mounted use requirement.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides a auto-change over device for on-vehicle high voltage dc power supply, this auto-change over device include main control unit, three-phase rectifier bridge, first diode, second diode, high voltage battery, high-voltage capacitor, first high voltage switch and first resistance, through concrete connection mode and the parameter setting between each module solve each power supply mode switching process in the on-vehicle consumer and have the problem of power supply breakpoint.
To achieve the above object, according to one aspect of the present invention, there is provided a switching device for an on-vehicle high voltage dc power supply, the switching device comprises a main control unit, a three-phase rectifier bridge, a first diode, a second diode, a high-voltage battery, a high-voltage capacitor, a first high-voltage switch and a first resistor, wherein the main control unit is connected with the three-phase rectifier bridge, a vehicle-mounted high-voltage direct-current power supply and the first high-voltage switch, a power input end of the three-phase rectifier bridge is connected with a three-phase mains supply, a positive end of the three-phase rectifier bridge is connected with a cathode of the first diode, an anode of the first diode is connected with a positive end of the vehicle-mounted high-voltage direct-current power supply, the positive end of the three-phase rectifier bridge and a negative end of the vehicle-mounted high-voltage direct-current power supply are connected in series through the first high-voltage switch and the high-voltage battery.
As a further improvement of the invention, the switching device further comprises a fuse, the positive end of the three-phase rectifier bridge is connected with the positive end of the vehicle-mounted electric equipment end through the fuse, and the negative end of the vehicle-mounted electric equipment is connected with the negative end of the vehicle-mounted high-voltage direct-current power supply.
As a further improvement of the present invention, the switching device further includes a second high-voltage switch, and the positive end of the three-phase rectifier bridge and the positive end of the vehicle-mounted electrical equipment end are connected through a series circuit of a fuse and the second high-voltage switch.
As a further improvement of the invention, the switching device further comprises a third high-voltage switch, and the positive end of the three-phase rectifier bridge is connected with the positive end of the vehicle-mounted electric equipment end through the third high-voltage switch.
As a further improvement of the invention, the high voltage battery is a lithium battery pack.
As a further improvement of the invention, the switching time of the lithium battery pack is not more than 3 milliseconds.
As a further improvement of the invention, the charging and discharging voltage range of the lithium battery pack is 450V-590V.
As a further improvement of the present invention, the high voltage capacitor C1 is a film capacitor.
As a further improvement of the invention, the reverse repetitive peak voltage VRRM of the three-phase rectifier bridge and the first diode is 1000V.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
the utility model relates to a switching device for a vehicle-mounted high-voltage direct-current power supply, which comprises a main control unit, a three-phase rectifier bridge, a first diode, a second diode, a high-voltage battery, a high-voltage capacitor, a first high-voltage switch and a first resistor, solves the problem of power supply breakpoints in the switching process of each power supply mode in the vehicle-mounted electric equipment through the specific connection mode and parameter setting among the modules, namely, when the three-phase commercial power or the vehicle-mounted high-voltage direct-current power supply is in normal power supply, the second high-voltage contactor is closed to supply power to the vehicle-mounted electric equipment, when three-phase commercial power and high-voltage direct current are powered off, the high-voltage capacitor supplies power to the electric equipment for a short time through the second diode, meanwhile, the first high-voltage switch is actuated, the high-voltage battery supplies power to the vehicle-mounted electric equipment, and the high-voltage capacitor is charged after current is limited by the first resistor, so that uninterrupted switching of a power supply mode is realized.
The utility model discloses a auto-switch over device for on-vehicle high voltage direct current power supply through the parameter setting that sets up each component part, realizes that the switching time of power supply mode is not more than 3ms to further ensure the incessant switching of power supply mode, this device has advantages such as easy operation, commonality are strong, small light in weight, interference killing feature are strong simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of a switching device for a vehicle-mounted high-voltage direct-current power supply according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
Fig. 1 is a schematic structural diagram of a switching device for a vehicle-mounted high-voltage direct-current power supply according to an embodiment of the present invention. As shown in FIG. 1, the switching device comprises a main control unit, a three-phase rectifier bridge V1, diodes V2-V3, a high-voltage battery BT1, a high-voltage capacitor C1, high-voltage switches K1-K3, resistors R1-R2 and a fuse F1.
The power supply end of the three-phase rectifier bridge V1 is connected with a three-phase mains supply, the positive end of the three-phase rectifier bridge V1 is connected with the cathode of a diode V2, the anode of a diode V2 is connected with the anode U + of a vehicle-mounted high-voltage direct-current power supply, the positive end of the three-phase rectifier bridge V1 and the cathode U-of the vehicle-mounted high-voltage direct-current power supply are connected in series through a high-voltage switch K1 and a high-voltage battery BT1, wherein the cathode of the high-voltage battery BT1 is closer to the cathode U-of the vehicle-mounted high-voltage direct-current power supply, the positive end of the three-phase rectifier bridge V1 and the cathode U-of the vehicle-mounted high-voltage direct-current power supply are connected in series through a resistor R1 and a diode V3, and then a high-voltage capacitor C7, the connection mode in FIG. 1 is only an;
the positive end of the three-phase rectifier bridge as an example is connected with the positive end U +2 of the vehicle-mounted electric equipment end through a fuse F1; preferably, the U +1 and the fuse F1 are connected in series with a resistor R2 through a high-voltage switch K2; furthermore, the U +1 and the fuse F1 are connected through a high-voltage switch K3; the negative end of the vehicle-mounted electric equipment is connected with the negative end of the vehicle-mounted high-voltage direct-current power supply;
the main control unit is connected with a three-phase commercial power, a vehicle-mounted high-voltage direct-current power supply bus and a high-voltage switch K1-K3, and is used for acquiring voltage and current information of the three-phase commercial power, high-voltage direct-current input, a high-voltage battery BT1 and the high-voltage power supply bus, and controlling the attraction and disconnection of the high-voltage switch after analyzing the information, so that the automatic switching and protection of the power supply of the high-voltage power supply are realized.
As an example of the present invention, the main control unit may collect information collection and analysis such as three-phase commercial power or high-voltage direct current U +, voltage and current of the high-voltage battery, and when the main control unit collects that the three-phase commercial power or the high-voltage direct current supplies power, the three-phase commercial power or the high-voltage direct current supplies power to the electric equipment; when the main control unit collects that three-phase mains electricity and high-voltage direct current are both powered off, the main control unit controls the high-voltage switch to be closed, and the high-voltage battery is switched to supply power to the electric equipment. As an example, the main control unit adopts a TI company DSP chip SM320F 28335. The chip is based on a CMOS (complementary metal oxide semiconductor) process, has a dominant frequency of 150MHz, has a high-performance 32-bit CPU and Harvard bus architecture, a 512KB flash memory and a 68KBRAM, and simultaneously has a 6-channel DMA processor, a 16-bit/32-bit external interface (2 Mx16 addressing range), 18 paths of PWM (pulse-width modulation) outputs, 6 paths of event capture inputs, 16 paths of timers, 16 channels of 12-bit A/D, 2 paths of McBSP, 1 path of I2C, 3 paths of SCI, 1 path of SPI (serial peripheral interface), 2 paths of CAN (controller area network), 1 path of 16-bit/32-bit external storage bus and other external interfaces. The chip meets the requirements of information acquisition of the high-voltage power supply uninterrupted switching device and contactor control, and the communication interface of the main control unit can send the information to the upper computer for display.
The direct current and the high-voltage direct current U + of the three-phase commercial power rectified by the three-phase rectifier bridge form a redundant power supply mode, and when the three-phase commercial power and the high-voltage direct current U + are supplied with power, the current can be limited by a resistor R1 and then the high-voltage capacitor C1 is charged. The main control unit collects voltage and current information of a three-phase mains supply, a high-voltage direct current U +, a high-voltage battery BT1 and a high-voltage power supply bus U + 1. When the three-phase commercial power, the high-voltage direct current U + power supply voltage and current are normal, the high-voltage switch K2 is controlled to be attracted, the vehicle-mounted electric equipment is charged through the current-limiting resistor R2, and after charging is completed, the high-voltage switch K3 is controlled to be attracted and the high-voltage switch K2 is controlled to be disconnected. When three-phase commercial power and high-voltage direct current are powered off, the high-voltage capacitor C1 supplies power for electric equipment for a short time through the diode V3, the high-voltage switch K1 is pulled in, the high-voltage battery BT1 supplies power for the electric equipment, and the high-voltage capacitor C1 is charged after current limiting is carried out through the resistor R1. When the three-phase commercial power or the high-voltage direct current is collected for power supply, the main control unit controls the high-voltage switch K1 to be switched off, the three-phase commercial power or the high-voltage direct current supplies power for the electric equipment, the uninterrupted switching of the power supply of the high-voltage power supply is realized, and the switching time is not more than 3 ms. When the main control unit acquires that the voltage and the current are abnormal, the high-voltage switch K3 is controlled to be switched off, and the protection of the electric equipment is realized.
As an example, the three-phase rectifier bridge V1 rectifies the three-phase mains supply into high-voltage direct current, and also has an anti-reverse-series function, which prevents the high-voltage U + from being reversely connected to the three-phase mains supply. V1 selects a silicon three-phase bridge rectifier QL93M of the Siam optical science and technology Limited company, the reverse repeated peak voltage VRRM is 1000V, the rectified average output current I0 is 60A, the forward non-repeated surge current IFSM is 600A, the reverse current IR is not more than 30uA, the forward average voltage VF (AV) is not more than 1.0V, the maximum working frequency fM is 3kHz, and the storage temperature Tstg is-55-125 ℃.
As an example, the diode V2 has an anti-string function, which prevents the back-string of the three-phase rectified high voltage dc to the U + terminal. The three-phase rectification high-voltage direct current and the high-voltage direct current U + can be input respectively or simultaneously, only one path with high voltage is input to the high-voltage power supply bus U +1 when the three-phase rectification high-voltage direct current and the high-voltage direct current are input simultaneously, and the other path with low voltage cannot be input due to reverse cut-off of a three-phase rectifier bridge and a diode. The diode V2 is 2CZ143(R) of the eighth, seventh and third factories of China and Ministry, the reverse repeated peak voltage VRRM is 1000V, the rectified average output current I0 is 85A, the forward non-repeated surge current IFSM is 230A, the reverse current IR is not more than 100uA, the forward average voltage VF (AV) is not more than 1.2V, and the storage temperature Tstg is-55-150 ℃.
As a preferred scheme, the high-voltage battery BT1 adopts a lithium battery pack with a switching time not longer than 3ms, the high-voltage power supply bus U +1 is not connected when the three-phase commercial power and the high-voltage direct current U + are powered on, so that the service life of the lithium battery pack is prolonged, when the three-phase commercial power and the high-voltage direct current U + are powered off, the lithium battery pack is connected to the high-voltage power supply bus U +1 through the high-voltage switch K1 to supply power to electric equipment, and the switching time is not longer than 3 ms. The lithium battery pack adopts a nano lithium iron phosphate positive electrode material, a composite graphite negative electrode material, a functional electrolyte, an optimized electrode process and a battery structure design, and has excellent low-temperature performance. The voltage rating of the lithium battery pack is 520V, the rated capacity of the battery pack is not less than 20Ah, the charging and discharging voltage range of the battery pack is 450V-590V, the maximum discharging capacity of the battery pack is not less than 3C (60A), and the cycle charging and discharging times of the battery pack are 1000 times.
As a preferable scheme, the high-voltage capacitor C1 is a thin-film capacitor, and has the main function of supplying power to the electric equipment between the switching of the high-voltage direct current and the lithium battery, and also has the functions of filtering and improving the power supply quality of the system. The resistor R1 can limit the charging current of the high-voltage capacitor, and prevent the equipment from being damaged by large current when the capacitor C1 is charged. When the power supply voltage on the high-voltage power supply bus is disconnected, the energy stored in the high-voltage capacitor C1 can supply power to the electric equipment through the diode V3. Preferably, the high-voltage capacitor C1 has a capacity of 4000uF, a rated voltage of 650V, a rated current of 50A and a constant current of 50A, and the discharge time of the constant current of 50A is not less than 10 ms.
The high-voltage switch K2 and the resistor R2 can be charged before the high-voltage switch K3 supplies power to the electric equipment, so that the equipment is prevented from being damaged by large-current impact. The high-voltage switch K3 transmits the high-voltage power on the high-voltage power supply bus to the electric equipment. The fuse F1 can be fused when the electric equipment is in failure and large current impact occurs in the line, so as to avoid damaging the equipment. As a preferable scheme, the high-voltage switch selects JQ-86F/028T of 891 factory, a contact resistive load 100A/1000VDC, a maximum switching power 75000W, contact load and life times 100A/1000VDC/1000 times, 20A/1000VDC/8000 times, a coil rated working voltage 28V, a maximum value 30.5V, a starting current 3.5A and a holding current 0.35A. The resistor R2 is RIG5 type resistor of 718 factory, the maximum working voltage is 1500V, and the rated power is 200W.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A switching device for a vehicle-mounted high-voltage direct-current power supply is characterized by comprising a main control unit, a three-phase rectifier bridge, a first diode, a second diode, a high-voltage battery, a high-voltage capacitor, a first high-voltage switch and a first resistor, the main control unit is connected with the three-phase rectifier bridge, the vehicle-mounted high-voltage direct current power supply and the first high-voltage switch, the power input end of the three-phase rectifier bridge is connected with three-phase commercial power, the positive end of the three-phase rectifier bridge is connected with the cathode of the first diode, the anode of the first diode is connected with the positive end of the vehicle-mounted high-voltage direct current power supply, the positive end of the three-phase rectifier bridge and the negative end of the vehicle-mounted high-voltage direct current power supply are connected in series through a first high-voltage switch and a high-voltage battery, and the positive end of the three-phase rectifier bridge and the negative end of the vehicle-mounted high-voltage direct-current power supply are connected in parallel through a first resistor and a second diode and then connected with a series high-voltage capacitor.
2. The switching device for the vehicle-mounted high-voltage direct current power supply according to claim 1, further comprising a fuse, wherein a positive end of the three-phase rectifier bridge is connected with a positive end of a vehicle-mounted electric device end through the fuse, and a negative end of the vehicle-mounted electric device is connected with a negative end of the vehicle-mounted high-voltage direct current power supply.
3. The switching device for the vehicle-mounted high-voltage direct current power supply according to claim 2, further comprising a second high-voltage switch, wherein the positive end of the three-phase rectifier bridge and the positive end of the vehicle-mounted electrical equipment end are connected through a series circuit of a fuse and the second high-voltage switch.
4. The switching device for the vehicle-mounted high-voltage direct current power supply according to any one of claims 1 to 3, further comprising a third high-voltage switch, wherein the positive end of the three-phase rectifier bridge is connected with the positive end of the vehicle-mounted electric equipment end through the third high-voltage switch.
5. A switching device for an on-board high voltage dc power supply according to any of claims 1-3, wherein the high voltage battery is a lithium battery pack.
6. The switching device according to claim 5, wherein the switching time of the lithium battery pack is not more than 3 milliseconds.
7. The switching device for the vehicle-mounted high-voltage direct-current power supply according to claim 5, wherein the charging and discharging voltage range of the lithium battery pack is 450V-590V.
8. The switching device for the vehicle-mounted high-voltage direct current power supply according to any one of claims 1 to 3, wherein the high-voltage capacitor C1 is a film capacitor.
9. A switching device for on-board high voltage direct current power supply according to any of claims 1-3, characterized in that the reverse repetitive peak voltage VRRM of the three phase rectifier bridge and the first diode is 1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935950.1U CN210297338U (en) | 2019-06-20 | 2019-06-20 | Switching device for vehicle-mounted high-voltage direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920935950.1U CN210297338U (en) | 2019-06-20 | 2019-06-20 | Switching device for vehicle-mounted high-voltage direct-current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210297338U true CN210297338U (en) | 2020-04-10 |
Family
ID=70097710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920935950.1U Active CN210297338U (en) | 2019-06-20 | 2019-06-20 | Switching device for vehicle-mounted high-voltage direct-current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210297338U (en) |
-
2019
- 2019-06-20 CN CN201920935950.1U patent/CN210297338U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205901410U (en) | Modular emergent guarantee power | |
| CN101969221B (en) | Storage battery charger and charging control method thereof | |
| CN106787045B (en) | Direct current power supply system and control method thereof | |
| CN109088461A (en) | A kind of electrically independent multichannel variety classes battery pack parallel control device of charge and discharge and method | |
| CN106059046A (en) | Combined emergency guarantee power source and power supply method thereof | |
| CN208401585U (en) | A kind of charge-discharge control circuit | |
| CN209056972U (en) | Nickel-metal hydride battery UPS control system | |
| CN117595449A (en) | Charging and discharging control device, charging control method and discharging control method | |
| CN113629854A (en) | Lithium battery power supply system with linear dynamic charging current-limiting function for communication equipment | |
| CN211320956U (en) | Charging and discharging circuit and charging and discharging system of online power supply | |
| CN209982165U (en) | Unsmooth constant voltage power supply circuit that group battery is changeable | |
| CN210297338U (en) | Switching device for vehicle-mounted high-voltage direct-current power supply | |
| CN111106659A (en) | Charging device, multi-battery charging system and charging cabinet | |
| CN111092471A (en) | Use method of overcharge and overdischarge protection circuit for energy storage battery pack | |
| CN201813191U (en) | Accumulator charger | |
| CN202084913U (en) | Automatic switching device for overdischarging of battery in direct current power supply system | |
| CN113659673A (en) | Quick charging and grid-connected connecting device based on energy storage power supply and working method thereof | |
| CN205945101U (en) | Modular super battery | |
| CN212572122U (en) | Constant-current voltage-limiting automatic power-off charger | |
| CN210608651U (en) | Charging device, multi-battery charging system and charging cabinet | |
| CN201910965U (en) | Emergency fluorescent lamp with multiple protection functions | |
| CN112615411A (en) | Three-phase UPS charging control circuit with center line and control method thereof | |
| CN110994781A (en) | UPS lithium battery integrated power supply system | |
| CN111371152A (en) | Charging management system for rechargeable battery and charging method based on charging management system | |
| CN217984665U (en) | Alternating current-direct current integrated circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |