CN109624714A - A kind of electric car power supply system - Google Patents
A kind of electric car power supply system Download PDFInfo
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- CN109624714A CN109624714A CN201811634297.1A CN201811634297A CN109624714A CN 109624714 A CN109624714 A CN 109624714A CN 201811634297 A CN201811634297 A CN 201811634297A CN 109624714 A CN109624714 A CN 109624714A
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- power supply
- electric car
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- battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides a kind of electric car power supply systems, including multiple battery cases, with BMS main control module, power supply system includes power supply unit, one in multiple battery cases is used as predetermined battery case, the battery module of m continuous series in n battery module in predetermined battery case constitutes power supply unit, the anode of power supply unit is connected with the first anode of BMS main control module, the cathode of power supply unit is connected with the first cathode of BMS main control module, control switch is provided between power supply unit and BMS main control module, when control switch is closed, current loop is formed between power supply unit and BMS main control module, power supply unit is used in electric car starting, it powers to BMS main control module, electric car power supply system in application is using power supply unit instead of lead-acid accumulator, reduce environmental pollution, it reduces The problem of cost effectively prevent after parking for a long time because of electric car, causes the electric car can not to start because of lead-acid accumulator feed.
Description
Technical field
The present invention relates to electric automobiles, and in particular to a kind of electric car power supply system.
Background technique
Up to today, a conventional fuel oil car is equipped on substantially every new energy pure electric automobile and is also all installed
12V or 24V lead-acid accumulator, to be powered to the part low-voltage electrical appliance on electric car.Although lead-acid accumulator
Low in cost, maintenance simply, but because lead itself belongs to heavy metal, can all cause in the disposal process in production, use and later period
Environmental pollution, the original intention for developing new energy cause with us are disagreed.
The service life of existing lead-acid accumulator is shorter, can not match the Life cycle of pure electric automobile, in pure electricity
It needs repeatedly to replace in electrical automobile life cycle, increases the maintenance cost in user's later period.Also, certainly due to lead-acid accumulator
It discharges bigger than lithium ion battery, therefore, is easy to appear feed situation after electric car is parked for a long time, and then cause electronic
The situation that vehicle complete vehicle can not start.In addition, the energy density due to lead-acid accumulator is low, volume is larger, needs to occupy one
Fixed vehicle body space, so that the natively space of hard up electric car, it appears narrower.
Summary of the invention
In view of this, one of the objects of the present invention is to provide a kind of electric car power supply systems, to solve the prior art
It is middle to be powered using lead-acid accumulator to low-voltage electrical appliance, larger interior space is occupied, and late maintenance cost is big, is easy to appear
The problem of feed situation causes electric car not to be available.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of electric car power supply system, the electric car include multiple battery cases, are wrapped in each battery case
Containing n battery module, the n battery modules are connected in series, and the electric car further includes BMS main control module, the power supply
System includes power supply unit,
One in multiple battery cases is used as predetermined battery case, the n battery moulds in the predetermined battery case
The battery module of m continuous series in block constitutes said supply unit, wherein n, m are natural number, and n be greater than or
Person is equal to m；
The anode of said supply unit is connected with the first anode of the BMS main control module, the cathode of said supply unit
It is connected with the first cathode of the BMS main control module, is provided with control between said supply unit and the BMS main control module
System switch forms current loop between said supply unit and the BMS main control module when control switch is closed, described
Power supply unit is used to replace lead-acid accumulator when the electric car starts, and powers to the BMS main control module.
Preferably, the predetermined battery case is the battery that BMS main control module described in distance is nearest in multiple battery cases
Case；And/or
The driver area of the electric car is arranged in the control switch.
Preferably, the operating voltage of the BMS main control module is first predetermined value x, and the voltage value of the battery module is
The value of second predetermined value y, m are as follows:
M=1+INT [x/y].
Preferably, the first anode and said supply unit that the BMS main control module is arranged in the control switch are just
Between pole, it is arranged in series stopper between the control switch and the first anode of the BMS main control module, described section
Locking apparatus is for preventing battery module of the current reflux into said supply unit.
Preferably, the stopper includes diode, and the conducting direction of the diode is directed toward by said supply unit
The BMS main control module.
Preferably, the electric car includes DC-DC module and battery system, and the DC-DC module is serially connected in the electricity
Between the positive electrode and negative electrode of cell system, the first relay is provided between the DC-DC module and the anode of the battery system
Device, is provided with battery system main relay between the anode of the battery system and the high voltage electric device of electric car, and described
One relay is in parallel with the battery system main relay；
The electromagnetic coil of first relay is connected with the BMS main control module, and the BMS main control module controls institute
State the on-off of the first relay.
Preferably, multiple battery cases are connected in series to form the battery system.
Preferably, the electric car includes the low-voltage power supply line connecting with the first output end of the DC-DC module
Road, the electromagnetic coil of the battery system main relay are being serially connected in the battery system main relay of the BMS main control module just
Between pole and the cathode of the low-voltage supply line, the BMS main control module is for controlling the battery system main relay
The voltage output of anode to control the on-off of the main relay of the battery system, and then controls the high pressure of the electric car
The on-off of the power supply of electrical appliance.
Preferably, the second output terminal of the DC-DC module is connect with the BMS main control module, to open in the control
When closing conjunction, the first relay closure, the DC-DC module and the battery system form current loop, the DC-
The high voltage direct current exported from the battery system is converted to low-voltage DC by DC module, and the low-voltage DC is supplied
To the BMS main control module, make the DC-DC module that said supply unit be replaced to power to the BMS main control module.
Preferably, the low-voltage supply line anode and cathode respectively with the first output end phase of the DC-DC module
Even, the electric car includes low voltage component, the low voltage component be serially connected in the low-voltage supply line positive electrode and negative electrode it
Between, when the electric car starts, the low-voltage supply line obtains electricity from the DC-DC module and is the low voltage component
Power supply.
Electric car power supply system in the application, instead of lead-acid accumulator, reduces environment dirt using power supply unit
The production and maintenance cost for contaminating, reducing pure electric automobile are effectively prevent after parking for a long time because of electric car, because plumbic acid stores
The problem of battery supply feed causes electric car that can not start.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 shows the attachment structure schematic diagram of the electric car power supply system of specific embodiment of the invention offer.
In figure:
1, battery system；11, battery case；111, battery module；112, predetermined battery case；113, power supply unit；
2, BMS main control module；21, the first anode；22, the first cathode；
3, control switch；
4, DC-DC module；41, the first output end；42, second output terminal；
5, the first relay；
6, battery system main relay；
7, low-voltage supply line.
Specific embodiment
Below based on embodiment, present invention is described, it should be understood by one skilled in the art that provided herein
Attached drawing is provided to the purpose of explanation, and attached drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
As shown in Figure 1, electric car includes multiple battery cases 11 this application provides a kind of electric car power supply system,
Multiple battery cases 11 are connected in series to form the battery system 1 of electric car, and battery system 1 is for motor, the sky to electric car
The high voltage electric devices such as tune, power assistance pump for steering, air pump are powered, to guarantee that electric car being capable of normally travel.Battery system 1
It is in an off state in the case where electric car does not have launch state, above-mentioned high voltage electric device can not be powered, only work as electricity
When electrical automobile starts, can form current loop is that high voltage electric device etc. is powered.It include n in each battery case 11
A battery module 111, n battery module 111 are connected in series, and each battery module 111 in each battery case 11 can be defeated
Certain voltage out, it is generally the case that battery module 111 is made of lithium titanate or LiFePO4 or nickle cobalt lithium manganate battery core,
Therefore, each battery module 111 can export the voltage of about 2.3V or 3.2V or 3.6V.
Electric car further includes BMS main control module 2 and power supply unit 113, and BMS main control module 2 is used for electric car
Operating condition etc. is controlled.One in multiple battery cases 11 is used as predetermined battery case 11211, in predetermined battery case 11211
N battery module 111 in m continuous series battery module 111 constitute power supply unit 113, wherein n, m are nature
Number, and n is more than or equal to m.Preferably, predetermined battery case 11211 is distance BMS main control module 2 in multiple battery cases 11
Nearest battery case 11, to facilitate wiring.The driver area of electric car is arranged in control switch 3, and user is facilitated to enter
Control switch 3 is operated behind vehicle drive region, it is preferable that control switch 3 is rocker switch, and driver passes through operation
Rocker switch control power supply unit 113 is powered to BMS main control module 2, and then starts electric car.Power supply unit 113
Anode be connected with the first of BMS main control module 2 positive 21, the first of the cathode of power supply unit 113 and BMS main control module 2 is negative
Pole 22 is connected, and control switch 3 is provided between power supply unit 113 and BMS main control module 2, when control switch 3 is closed, power supply
Current loop is formed between unit 113 and BMS main control module 2, power supply unit 113 is used to replace lead-acid accumulator in electronic vapour
When vehicle starts, power to BMS main control module 2.Since power supply unit 113 is instead of lead-acid accumulator, in electric car
It no longer needs that lead-acid accumulator is arranged.The space that lead-acid accumulator occupies electric car is not only reduced, environment is also protected,
The production and maintenance cost for efficiently solving pure electric automobile are effectively prevent after parking for a long time because of electric car, because plumbic acid stores
The problem of battery supply feed causes electric car that can not start.
The operating voltage of BMS main control module 2 is first predetermined value x, and the voltage value of battery module 111 is second predetermined value
Y, the value of the quantity m of battery module 111 are as follows:
M=1+INT [x/y].
Wherein, INT is to be rounded downwards.
For example, battery module 111 is lithium titanate electricity if the operating voltage of BMS main control module 2 is first predetermined value 12V
Core, voltage value are second predetermined value 2.3V, then 111 quantity m=1+INT [12/2.3]=6 of battery module, then 6 groups of battery moulds
Block 111 is composed in series power supply unit 113 and powers for BMS main control module 2.
If the operating voltage of BMS main control module 2 is first predetermined value 24V, battery module 111 is metatitanic acid lithium cell, voltage
Value is second predetermined value 2.3V, then 111 quantity m=1+INT [24/2.3]=11 of battery module, then 11 groups of battery modules 111
It is composed in series power supply unit 113 and powers for BMS main control module 2.
Further, it has been arranged in series stopper between control switch 3 and the first anode 21 of BMS main control module 2,
For preventing battery module 111 of the current reflux into power supply unit 113, m battery module 111 in power supply unit 113 is caused
Voltage and 111 voltage of other battery modules in battery case 11 it is inconsistent, influence total quality and the service life of battery case 11,
Preferably, stopper includes diode, and the conducting direction of diode is directed toward BMS main control module by 113 anode of power supply unit
2, make the circuit one-way conduction between the anode of power supply unit 113 and BMS master control, prevents current reflux.
Electric car further includes DC-DC module 4 and battery system 1, and DC-DC module 4 is serially connected in the anode of battery system 1
Between cathode, for the pure electric vehicles such as light, remote monitoring module, route board, electric machine controller low pressure components to outside car
On low-voltage electrical appliance provide low-tension supply, the first relay is provided between DC-DC module 4 and the anode of battery system 1
5,.The electromagnetic coil of first relay 5 is connected with BMS main control module 2, and BMS main control module 2 controls the logical of the first relay 5
It is disconnected.
Electric car further includes the low-voltage supply line 7 connecting with the first output end 41 of DC-DC module 4, battery system
Anode and electric car high voltage electric device between be provided with battery main relay 6, the electromagnetism of battery system main relay 6
Coil tandem is between the anode of the battery system main relay of BMS main control module 2 and the cathode of low-voltage supply line 7, and first
Relay 5 is in parallel with battery system main relay 6.BMS main control module 2 is used to control the anode of battery system main relay 6
Voltage output, to control the on-off of battery system main relay 6, and then control the power supply of the high voltage electric device of electric car
On-off.When needed, the voltage of the anode output 24V+ of BMS main control module control battery system main relay 6, control
Battery system main relay 6 processed is closed, and is powered to the high voltage electric device of electric car；When electric car is unwanted,
BMS main control module 2 control battery system main relay 6 anode stop output 24V+ voltage, control battery system master after
Electric appliance disconnects, and stops powering to electric automobile high-voltage electrical appliance.
The second output terminal 42 of DC-DC module 4 is connect with BMS main control module 2, with control switch 3 be closed when, BMS master
It controls module 2 and controls the first relay 5 closure, DC-DC module 4 and battery system 1 form current loop, and DC-DC module 4 will be from
The high voltage direct current that battery system 1 exports is converted to low-voltage DC, and low-voltage DC is supplied BMS main control module 2, makes
DC-DC module 4 replaces power supply unit 113 to power to BMS main control module 2.
The anode and cathode of low-voltage supply line 7 are connected with the first output end 41 of DC-DC module 4 respectively, electric car
Including low voltage component, low voltage component is serially connected between the positive electrode and negative electrode of low-voltage supply line 7, when electric car starts, low pressure
Power supply line 7 obtains electricity from DC-DC module 4 and powers for low voltage component.
A specific embodiment is set forth below to electric in the present invention in technical solution in order to better illustrate the present invention
The start-up course of electrical automobile power supply system is described:
When vehicle launch, driver is closed rocker switch, and power supply unit 113 is allowed to provide power supply to BMS main control module 2,
BMS main control module 2 first carries out self-test after powering on, after confirmation is without exception, control the first relay 5, DC-DC module 4 and electricity
Cell system 1 forms current loop, and DC-DC module 4 is started to work, and powers to all low pressure components on vehicle；
Car key is screwed to ACC grades from OFF grades by driver, and all low pressure components by ACC control are in DC-DC on vehicle
Start to work under the power supply of module 4, when driver by car key from when being screwed to ON grades for ACC grades, electric machine controller self-test, if at
Function then sends closure battery system main relay request to BMS main control module 2, and BMS self-test is closed power battery if success
1 main relay of system, vehicle enter normal operating conditions, and so far, 12V or 24V lead-acid accumulator is not being installed in realization, utilize
In the case that lead-acid accumulator is powered, vehicle normally starts and travels.
Electric car power supply system in the application, instead of lead-acid accumulator, reduces environment dirt using power supply unit
The production and maintenance cost for contaminating, reducing pure electric automobile are effectively prevent after parking for a long time because of electric car, because plumbic acid stores
The problem of battery supply feed causes electric car that can not start.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
The above is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
Speech, the invention can have various changes and changes.All any modifications made within the spirit and principles of the present invention are equal
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electric car power supply system, the electric car includes multiple battery cases, includes n in each battery case
A battery module, the n battery modules are connected in series, and the electric car further includes BMS main control module, it is characterised in that:
The power supply system includes power supply unit,
One in multiple battery cases is used as predetermined battery case, in the n battery modules in the predetermined battery case
M continuous series the battery module constitute said supply unit, wherein n, m are natural number, and n is greater than or waits
In m；
The anode of said supply unit is connected with the first anode of the BMS main control module, the cathode of said supply unit and institute
The first cathode for stating BMS main control module is connected, and is provided with control between said supply unit and the BMS main control module and opens
It closes, when the control switch is closed, forms current loop, the power supply between said supply unit and the BMS main control module
Unit is used to replace lead-acid accumulator when the electric car starts, and powers to the BMS main control module.
2. electric car power supply system according to claim 1, it is characterised in that: the predetermined battery case is multiple described
The nearest battery case of BMS main control module described in distance in battery case；And/or
The driver area of the electric car is arranged in the control switch.
3. electric car power supply system according to claim 1, it is characterised in that: the work electricity of the BMS main control module
Pressure is first predetermined value x, and the voltage value of the battery module is second predetermined value y, the value of m are as follows:
M=1+INT [x/y].
4. according to claim 1 to electric car power supply system described in one of 3, it is characterised in that: the control switch setting
Between the first anode and the anode of said supply unit of the BMS main control module, the control switch and the BMS master control
Stopper is arranged in series between first anode of module, the stopper is for preventing current reflux single to the power supply
Battery module in member.
5. electric car power supply system according to claim 4, it is characterised in that: the stopper includes diode,
The conducting direction of the diode is directed toward the BMS main control module by said supply unit.
6. according to claim 1 to electric car power supply system described in one of 3, which is characterized in that the electric car includes
DC-DC module and battery system, the DC-DC module are serially connected between the positive electrode and negative electrode of the battery system, the DC-DC
The first relay, the height of the anode and electric car of the battery system are provided between module and the anode of the battery system
It is provided with battery system main relay between pressure electrical appliance, first relay is in parallel with the battery system main relay；
The electromagnetic coil of first relay is connected with the BMS main control module, the BMS main control module control described first
The on-off of relay.
7. electric car power supply system according to claim 6, which is characterized in that shape is connected in series in multiple battery cases
At the battery system.
8. electric car power supply system according to claim 6, which is characterized in that the electric car include with it is described
The low-voltage supply line of the first output end connection of DC-DC module, the electromagnetic coil of the battery system main relay are serially connected in
Positive between the cathode of the low-voltage supply line, the BMS master of the battery system main relay of the BMS main control module
Control module is used to control the voltage output of the anode of the battery system main relay, to control the battery system main relay
On-off, and then control the on-off of the power supply of the high voltage electric device of the electric car.
9. electric car power supply system according to claim 8, which is characterized in that the second output of the DC-DC module
End is connect with the BMS main control module, in control switch closure, first relay is closed, the DC-DC mould
Block and the battery system form current loop, and the DC-DC module turns the high voltage direct current exported from the battery system
It is changed to low-voltage DC, and the low-voltage DC is supplied into the BMS main control module, is made described in the DC-DC module replacement
Power supply unit is powered to the BMS main control module.
10. electric car power supply system according to claim 8, which is characterized in that the anode of the low-voltage supply line
It is connected respectively with the first output end of the DC-DC module with cathode, the electric car includes low voltage component, the low pressure member
Part is serially connected between the positive electrode and negative electrode of the low-voltage supply line, when the electric car starts, the low-voltage supply line
Electricity is obtained from the DC-DC module and is powered for the low voltage component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634297.1A CN109624714B (en) | 2018-12-29 | 2018-12-29 | Power supply system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634297.1A CN109624714B (en) | 2018-12-29 | 2018-12-29 | Power supply system of electric automobile |
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| CN109624714A true CN109624714A (en) | 2019-04-16 |
| CN109624714B CN109624714B (en) | 2022-04-19 |
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| CN113954687A (en) * | 2021-10-20 | 2022-01-21 | 浙江吉利控股集团有限公司 | General control device, electric vehicle and vehicle platform |
| CN114194319A (en) * | 2021-12-30 | 2022-03-18 | 广东高标电子科技有限公司 | Electric vehicle starting device and electric vehicle |
| WO2022077289A1 (en) * | 2020-10-14 | 2022-04-21 | 华为技术有限公司 | Low-voltage redundant power supply system |
| CN114454834A (en) * | 2022-01-13 | 2022-05-10 | 江铃汽车股份有限公司 | Electric automobile power distribution system and electric automobile |
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