CN209299139U - The automobile-used DC-DC converter of low-speed electronic four-wheel - Google Patents
The automobile-used DC-DC converter of low-speed electronic four-wheel Download PDFInfo
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- CN209299139U CN209299139U CN201822215467.4U CN201822215467U CN209299139U CN 209299139 U CN209299139 U CN 209299139U CN 201822215467 U CN201822215467 U CN 201822215467U CN 209299139 U CN209299139 U CN 209299139U
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Abstract
The utility model belongs to the automobile-used DC-DC converter control field of low-speed electronic four-wheel, relates generally to a kind of automobile-used DC-DC converter of low-speed electronic four-wheel.High input voltage anode, the high input voltage cathode of the DC-DC converter of proposition are connected to power battery pack；DC-DC converter has the output end of two-way different voltages grade: the main output plus terminal of 13.5V, 14.5V assist output plus terminal；The major loop components load of the main output plus terminal connection vehicle of 13.5V；14.5V assists output plus terminal by assisting, and output diode is communicated with the 12V booster battery being arranged in parallel and subsidiary loop components load；Insurance is provided between 12V booster battery and 14.5V auxiliary output plus terminal, between the load of subsidiary loop components and 14.5V auxiliary output plus terminal.The utility model had not only met the requirement of vehicle electric appliance load, but also extended the service life of booster battery.
Description
Technical field
The utility model belongs to the automobile-used DC-DC converter control field of low-speed electronic four-wheel, relates generally to a kind of low speed electricity
The dynamic automobile-used DC-DC converter of four-wheel.
Background technique
For low-speed electronic carriage after the shutdown of vehicle high voltage power battery, individual parts need to enter the standby shape of low-voltage electric
The components such as state, including position lamp, double sudden strain of a muscle warning lamps, central control lock controller, instrument, therefore need to increase auxiliary in circuit design
Power supply provides normal electricity for above-mentioned circuit.For configuring the vehicle of lithium battery system, it is pre- to vehicle high-pressure system to be related to lithium battery
Problem is filled, more needs to define power supply electrifying order.Problem above requires during designing vehicle DC-DC converter
Emphasis considers, meets the needs of vehicle electric system
There are mainly two types of modes for common technology currently on the market:
1, using doubleway output but the DC-DC converter of only one voltage class function is exported, after key switch is closed
DC-DC converter remains to output, and voltage is to power with normal electric parts all the way.The advantages of this scheme is that system is simple and convenient, cost
It is low.Disadvantage is after vehicle key switch is closed, and vehicle high voltage power battery cannot turn off, and can have some potential safety problems；
There are certain power consumption in this normal electric parts of external cause band standby itself, long-term standing can lead to vehicle high voltage power battery and lose
Electricity, overdischarge.Because such mode is necessarily high voltage control, the risk for having high pressure to contact, there are security risks；For configuration lithium electricity
The vehicle of cell system, this scheme do not meet actual demand more；
2, DC-DC converter is still single channel output, and increasing by one piece of low pressure booster battery is to power with normal electric parts, whole
Also power supply maintains corresponding components work, after opening key switch, DC-DC converter work after the shutdown of overall height pressure power battery
It can charge after work for booster battery.This scheme advantage be vehicle high voltage power battery shutdown after the standby components of low-voltage electric still
It can work, even if vehicle is stood for a long time will not lead to vehicle high voltage power battery power shortage.Disadvantage is because of single channel DC-DC converter
Other power loads for vehicle are also needed to be powered, output voltage is too many no more than components voltage rating, therefore not can guarantee
It is fully charged for low pressure booster battery.
Low-speed electronic carriage is substantially both the above mode of taking in the market at present, and above two scheme has accordingly
The shortcomings that, there are the unreliable problems such as security risk；Simultaneously according to standard and regulation trend, vehicle DC-DC converter is preferably used
Low voltage control.
Utility model content
In order to solve the above technical problems, the utility model aim is to propose a kind of automobile-used DC-DC conversion of low-speed electronic four-wheel
Device.
The utility model is to complete above-mentioned purpose to adopt the following technical scheme that
A kind of automobile-used DC-DC converter of low-speed electronic four-wheel, high input voltage anode, the high input voltage of DC-DC converter are negative
Pole is connected to power battery pack；Output end of the DC-DC converter with two-way different voltages grade: the main output plus terminal of 13.5V,
14.5V assisting output plus terminal；The major loop components load of the main output plus terminal connection vehicle of the 13.5V, to be led back
Components load in road is powered；The 14.5V auxiliary output plus terminal is arranged in parallel by assisting output diode to be communicated with
12V booster battery and subsidiary loop components load；The 12V booster battery and 14.5V auxiliary output plus terminal it
Between, subsidiary loop components load 14.5V auxiliary output plus terminal between be provided with insurance；The auxiliary output diode
Key switch is in series between the control terminal of DC-DC converter；The control terminal uses 12V low voltage control；Described is whole
When vehicle power battery pack or key switch are closed, the 14.5V assists output plus terminal and 12V booster battery and assists back
Open circuit is formed between the load of road components, standby subsidiary loop components load need to be charged and powered by 12V booster battery.
Input insurance is provided between the high input voltage anode and power battery pack of DC-DC converter.
Export insurance is provided between the load of the major loop components of the main output plus terminal of the 13.5V and vehicle.
DC-DC converter auxiliary output loop voltage is set as filling for 14.5V matching low pressure booster battery (12V specification)
Piezoelectric voltage demand carries out overall process charging according to battery charge characteristic, avoids booster battery due to fully charged for a long time
Lead to battery power shortage and the lost of life.
Facilities are loaded according to major loop in vehicle principle and subsidiary loop simultaneously, it is specified to DC-DC converter two-way
Power carries out reasonable distribution, and guaranteeing the power in two circuits, there are surpluses.The setting of auxiliary output loop power rationally avoids
The loss of booster battery electricity in driving process, vehicle power-supply system are in benign cycle
For configuration lithium battery vehicle, increase output delay function in DC-DC converter, i.e., after key enables rear 3s
DC-DC converter work, avoids and BMS preliminary filling conflict in process.
This scheme innovatively propose on the basis of two kinds of common technology schemes on the market two-way different voltages grade and
The DC-DC converter working method of power output, had not only met the requirement of vehicle electric appliance load, but also extended booster battery
Service life.
Detailed description of the invention
Fig. 1 is the utility model DC-DC converter operating circuit schematic diagram.
In figure: 1, DC-DC converter；2, input insurance；3, power battery pack；4, export insurance；5, major loop components
Load；6,12V booster battery；7, subsidiary loop components load；8, insure；10, key switch；11, two poles of auxiliary output
Pipe.
Specific embodiment
The utility model is further illustrated with reference to the drawings and specific embodiments:
As shown in Figure 1, a kind of automobile-used DC-DC converter of low-speed electronic four-wheel, the high input voltage anode of DC-DC converter 1,
High input voltage cathode is connected to power battery pack 3；The DC-DC converter has the output end of two-way different voltages grade: 13.5V
Main output plus terminal, 14.5V assist output plus terminal；The major loop components load of the main output plus terminal connection vehicle of the 13.5V
5, to be powered to the load of major loop components；The 14.5V auxiliary output plus terminal passes through auxiliary output diode 11
It is communicated with the 12V booster battery 6 being arranged in parallel and subsidiary loop components load 7；The 12V booster battery with
Insurance is provided between 14.5V auxiliary output plus terminal, between subsidiary loop components load 7 and 14.5V auxiliary output plus terminal
8；Key switch 10 is in series between auxiliary output diode 11 and the control terminal of DC-DC converter；The control
End uses 12V low voltage control；When the vehicle power battery pack or key switch are closed, the 14.5V auxiliary output is just
Open circuit is formed between end and the load of 12V booster battery and subsidiary loop components, standby subsidiary loop zero need to be charged
Part load is powered by 12V booster battery.For configuration lithium battery vehicle, increase output delay function in DC-DC converter,
That is DC-DC converter works after the enabled rear 3s of key, avoids and BMS preliminary filling conflict in process.
Input insurance 2 is provided between the high input voltage anode and power battery pack of DC-DC converter.
Export insurance 4 is provided between the load of the major loop components of the main output plus terminal of the 13.5V and vehicle.
Claims (3)
1. a kind of automobile-used DC-DC converter of low-speed electronic four-wheel, it is characterised in that: high input voltage anode, the height of DC-DC converter
Pressure input cathode is connected to power battery pack；The DC-DC converter has the output end of two-way different voltages grade: 13.5V master
Output plus terminal, 14.5V assist output plus terminal；The major loop components load of the main output plus terminal connection vehicle of the 13.5V；Institute
The 14.5V auxiliary output plus terminal stated is by assisting output diode to be communicated with the 12V booster battery being arranged in parallel and assist back
The load of road components；The 12V booster battery and 14.5V auxiliary output plus terminal between, subsidiary loop components load with
Insurance is provided between 14.5V auxiliary output plus terminal；The control terminal of the described auxiliary output diode and DC-DC converter it
Between be in series with key switch；The control terminal uses 12V low voltage control.
2. a kind of automobile-used DC-DC converter of low-speed electronic four-wheel as described in claim 1, it is characterised in that: DC-DC converter
The described high input voltage anode and power battery pack between be provided with input insurance.
3. a kind of automobile-used DC-DC converter of low-speed electronic four-wheel as described in claim 1, it is characterised in that: the 13.5V
Export insurance is provided between the load of the major loop components of main output plus terminal and vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822215467.4U CN209299139U (en) | 2018-12-27 | 2018-12-27 | The automobile-used DC-DC converter of low-speed electronic four-wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822215467.4U CN209299139U (en) | 2018-12-27 | 2018-12-27 | The automobile-used DC-DC converter of low-speed electronic four-wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299139U true CN209299139U (en) | 2019-08-23 |
Family
ID=67649277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822215467.4U Active CN209299139U (en) | 2018-12-27 | 2018-12-27 | The automobile-used DC-DC converter of low-speed electronic four-wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299139U (en) |
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2018
- 2018-12-27 CN CN201822215467.4U patent/CN209299139U/en active Active
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