CN107640031A - Electric automobile low tension battery management system and method - Google Patents
Electric automobile low tension battery management system and method Download PDFInfo
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- CN107640031A CN107640031A CN201710669408.1A CN201710669408A CN107640031A CN 107640031 A CN107640031 A CN 107640031A CN 201710669408 A CN201710669408 A CN 201710669408A CN 107640031 A CN107640031 A CN 107640031A
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- tension battery
- low tension
- vbu
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Abstract
The invention discloses a kind of electric automobile low tension battery management system and method, the present invention is that high-low pressure direct current transducer and first contactor are set between electrokinetic cell and low tension battery, and monitor the voltage of low tension battery, and then charged using electrokinetic cell after the voltage of low tension battery is less than certain level and by first contactor and low-voltage direct converter to low tension battery, after ensureing that electric automobile is parked for a long time, it can also cause the normal startup of vehicle.Meanwhile in the embodiment of the present invention, after the power-off that VBU performs KL30 relays, into park mode, so as to further extend the electric quantity consumption of low tension battery.
Description
Technical field
The present invention relates to batteries of electric automobile management domain, the low tension battery management system of more particularly to a kind of electric automobile
System and the method that low tension battery management is carried out using the system.
Background technology
Low-pressure system power supply in pure electric automobile is supplied by 12V batteries.Demand is not travelled in driver, it is long
In the case that time places electric automobile, the 12V discharged or defective batteries in electric automobile can be caused so that the voltage of 12V batteries
Outside the normal working voltage scope of controller, cause entire car controller to wake up, cause vehicle to start.This
In the case of, other powered 12V batteries can only be utilized to replace, to enable the controller to normal work.
The 12V capacity of the accumulators of pure electric automobile are small, and the feelings started next time can not be supported in the event of 12V batteries
Condition, then the occurrence of vehicle being caused not start.
The content of the invention
It is an object of the invention to provide a kind of electric automobile low tension battery management system and method, to be maintained at electronic vapour
12V batteries in car avoid being in power shortage state, and then after electric automobile is parked for a long time, can also ensure opening for vehicle
Kinetic force.
The invention provides a kind of electric automobile low tension battery management system, including：
Voltage sensor, the voltage sensor are installed on the low tension battery, to detect the low tension battery
Voltage；
High-low pressure direct current transducer, the high-low pressure direct current transducer is connected to the low tension battery, and passes through first
Contactor is connected to the electrokinetic cell of the electric automobile, and the control terminal of the first contactor is connected to microprocessor VBU；
The VBU is connected with the voltage sensor, and is powered by the low tension battery, and the VBU is according to described low
Press the voltage of battery to control the break-make of the first contactor, and then control the charged state of the low tension battery.
Further, the VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then controls
The charged state of the low tension battery is made, including：
When the voltage of the low tension battery is less than feed threshold limit value, the VBU controls the first contactor to connect
It is logical so that the electrokinetic cell is charged by the high-low pressure direct current transducer to the low tension battery, and according to described low
Accumulator capacity and the feed threshold limit value is pressed to determine charging duration, after the charging duration is reached, the VBU controls
The first contactor disconnects, to stop the charging of the low tension battery.
Further, the VBU is also connected with KL15 signal ends, CC signal ends, CP signal ends, CC2 signal ends respectively, and
And the VBU is additionally coupled to the control terminal of KL30 relays；
Judge that the voltage of the low tension battery is not have KL15 signals, and CC whether less than feed threshold limit value
What signal, CP signals and CC2 signals were also carried out without in the case of.
Further, it is described after power down postpones the first duration in the case of the vehicle power supply power-fail of the electric automobile
VBU controls the KL30 relays to disconnect, and the VBU enters park mode afterwards.
Further, the low tension battery is 12V batteries.
Present invention also offers a kind of electric automobile low tension battery management method, including：
By first contactor and high-low pressure direct current transducer, the electrokinetic cell of the electric automobile is connected to described low
Press battery；
Detect the voltage of the low tension battery；
VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then controls the low pressure
The charged state of battery.
Further, VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then controls institute
The charged state of low tension battery is stated, including：
When the voltage of the low tension battery is less than feed threshold limit value, the VBU controls the first contactor to connect
It is logical so that the electrokinetic cell is charged by the high-low pressure direct current transducer to the low tension battery, and according to described low
Pressure accumulator capacity and the feed threshold limit value determine the duration to be charged to the low tension battery, described when reaching
After duration, the VBU controls the first contactor to disconnect, to stop the charging to the low tension battery.
Further, methods described also includes：
VBU monitoring KL15 signals, CC signals, CP signals and the CC2 signals；
Judge that the voltage of the low tension battery is that the VBU is not having KL15 signals whether less than threshold limit value is fed,
And what CC signals, CP signals and CC2 signals were also carried out without in the case of.
Further, methods described also includes：
In the case of vehicle power supply power-fail, after power down postpones the first duration, the VBU controls KL30 relays break
Open, the VBU enters park mode afterwards.
Further, when the KL15 signals be present, the KL15 signals wake up the VBU, afterwards, the VBU controls
The closure of the KL30 relays；
When carrying out the charging of the electric automobile：
If trickle charge state, then the CC signals and CP signals wake up the VBU, and afterwards, the VBU controls the KL30
The closure of relay；
If fast charge state, then the CC2 signals wake up the VBU, and afterwards, the VBU controls the KL30 relays
Closure.
From such scheme as can be seen that the present invention electric automobile low tension battery management system and method, in power electric
High-low pressure direct current transducer and first contactor are set between pond and low tension battery, and monitor the voltage of low tension battery, is entered
And circulated using electrokinetic cell after the voltage of low tension battery is less than certain level and by first contactor and low-pressure direct
Parallel operation charges to low tension battery, after ensureing that electric automobile is parked for a long time, can also cause the normal startup of vehicle.Together
When, in the embodiment of the present invention, after the power-off that VBU performs KL30 relays, into park mode, so as to further extend low pressure
The electric quantity consumption of battery.
Brief description of the drawings
The following drawings only does schematic illustration and explanation to the present invention, not delimit the scope of the invention.
Fig. 1 is the structured flowchart of electric automobile low tension battery management system in the embodiment of the present invention；
Fig. 2 is the flow chart of electric automobile low tension battery management method in the embodiment of the present invention.
Label declaration
11st, voltage sensor
12nd, high-low pressure direct current transducer
13、VBU
14th, first contactor
15th, fuse
2nd, low tension battery
3rd, electrokinetic cell
41st, KL15 signal ends
42nd, CC signal ends
43rd, CP signal ends
44th, CC2 signal ends
45th, KL30 relays
Embodiment
In order to which the technical characteristic of invention, purpose and effect are more clearly understood, now control brief description of the drawings is of the invention
Embodiment, in the various figures identical label represent identical part.
Herein, " schematic " expression " serving as example, example or explanation ", will should not be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to a kind of preferred or more advantageous technical scheme.
To make simplified form, part related to the present invention is only schematically show in each figure, and do not represent it
Practical structures as product.In addition, so that simplified form readily appreciates, there is the portion of identical structure or function in some figures
Part, one of those is only symbolically depicted, or only marked one of those.
Herein, " first ", " second " etc. are only used for mutual differentiation, rather than represent significance level and order and
Existing premise etc. each other.
Herein, the limitation in " equal ", " identical " etc. and non-critical mathematics and/or geometry meaning, is also included
It will be appreciated by those skilled in the art that and manufacture or the error for the permission such as using.
Unless otherwise indicated, number range herein not only includes the gamut in two end points, also includes containing
In some subranges therein.
The embodiments of the invention provide a kind of electric automobile low tension battery management system and provide a kind of utilization simultaneously
The electric automobile low tension battery management method of the system, the present invention lose in electric automobile low tension battery (such as 12V batteries)
Can be in time its charging, and then ensure the normal startup of electric automobile when electric.
Fig. 1 shows the structure of the electric automobile low tension battery management system in the present invention, as shown in figure 1, of the invention
In embodiment, the electric automobile low tension battery management system mainly includes voltage sensor 11, high-low pressure direct current transducer
12nd, microprocessor VBU13, first contactor 14.Wherein, the voltage sensor 11 is installed on low tension battery 2, to detect
State the voltage of low tension battery 2.The high-low pressure direct current transducer 12 is connected to the low tension battery 2, and passes through described
One contactor 14 is connected to the electrokinetic cell 3 of the electric automobile, and the control terminal of the first contactor 14 is connected to described
VBU13.The VBU13 is connected with the voltage sensor 11, and is powered by the low tension battery 2, and the VBU13 is according to institute
The voltage (being gathered by the voltage sensor 11) for stating low tension battery 2 controls the break-make of the first contactor 14, and then controls
Make the charged state of the low tension battery 2.Wherein, the low tension battery 2 is 12V batteries.
Specifically, the VBU13 controls the break-make of the first contactor 14 according to the voltage of the low tension battery 2,
And then the charged state of the low tension battery 2 is controlled, including：
When the voltage of the low tension battery 2 is less than feed threshold limit value, the VBU13 controls the first contactor
14 are connected so that the electrokinetic cell 2 is charged by the high-low pressure direct current transducer 12 to the low tension battery 2, and root
Charging duration is determined according to the capacity and the feed threshold limit value of the low tension battery 2, after the charging duration is reached,
The VBU13 controls the first contactor 14 to disconnect, to stop the charging of the low tension battery 2.
With continued reference to shown in Fig. 1, the VBU13 also respectively with KL15 signal ends 41, CC signal ends 42, CP signal ends 43,
CC2 signal ends 44 connect, also, the VBU13 is additionally coupled to the control terminal of KL30 relays 45.In the embodiment of the present invention, sentence
Whether the voltage of the disconnected low tension battery 2 is not have KL15 signals (to be carried by KL15 signal ends 41 less than feed threshold limit value
For), and CC signals (being provided by CC signal ends 42), CP signals (being provided by CP signal ends 43) and CC2 signals are (by CC2 signals
End 44 provides) also carried out without in the case of.Wherein, KL15 refers to the power supply line after car key to ON states,
KL30 refers to vehicle low tension battery power supply line, and CC signals, CP signals and CC2 signals refer to three during charging electric vehicle
Individual signal, if CC signals, CP signals and/or CC2 signals be present, show that electric automobile is in charged state.
In the embodiment of the present invention, in the case of the vehicle power supply power-fail of the electric automobile, in power down delay first
After length, the VBU13 controls the KL30 relays 45 to disconnect, and the VBU13 enters park mode afterwards.Because VBU13 is
Powered by low tension battery 2, so, VBU13 enters the electricity that park mode can further reduce low tension battery 2 after parking power down
Amount consumption, ensures that later electric automobile whole can normally start.
In addition, in the embodiment of the present invention, pass through fuse between first contactor 14 and high-low pressure direct current transducer 12
15 are connected, and the effect of fuse 15 is to prevent from electric current excessive high-low pressure direct current transducer 12 and low tension battery 2 are caused to rush
Hit and damage.
The embodiment of the present invention additionally provides a kind of electric automobile low tension battery management method, and this method can be used and above given an account of
The electric automobile low tension battery management system to continue is realized, as shown in Fig. 2 this method includes：
By first contactor and high-low pressure direct current transducer, the electrokinetic cell of the electric automobile is connected to described low
Press battery；
Detect the voltage of the low tension battery；
VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then controls the low pressure
The charged state of battery.
Wherein, VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then described in control
The charged state of low tension battery, is specifically included：
When the voltage of the low tension battery is less than feed threshold limit value, the VBU controls the first contactor to connect
It is logical so that the electrokinetic cell is charged by the high-low pressure direct current transducer to the low tension battery, and according to described low
Pressure accumulator capacity and the feed threshold limit value determine the duration to be charged to the low tension battery, described when reaching
After duration, the VBU controls the first contactor to disconnect, with the charging to the low tension battery.
Further, methods described also includes：
VBU monitoring KL15 signals, CC signals, CP signals and the CC2 signals；
Judge that the voltage of the low tension battery is that the VBU is not having KL15 signals whether less than threshold limit value is fed,
And what CC signals, CP signals and CC2 signals were also carried out without in the case of.
Further, methods described also includes：
In the case of vehicle power supply power-fail, after power down postpones the first duration, the VBU controls KL30 relays break
Open, the VBU enters park mode afterwards.
Further, method of the invention also includes：
When the KL15 signals be present, the KL15 signals wake up the VBU, and afterwards, the VBU controls the KL30
The closure of relay；
When carrying out the charging of the electric automobile：
If trickle charge state, then the CC signals and CP signals wake up the VBU, and afterwards, the VBU controls the KL30
The closure of relay；
If fast charge state, then the CC2 signals wake up the VBU, and afterwards, the VBU controls the KL30 relays
Closure.
In the embodiment of the present invention, the feed threshold limit value is 9V, a length of 30s when described first.
The electric automobile low tension battery management system and method for the present invention, sets between electrokinetic cell and low tension battery
High-low pressure direct current transducer and first contactor are put, and monitors the voltage of low tension battery, and then when the voltage of low tension battery
Charged less than using electrokinetic cell after certain level and by first contactor and low-voltage direct converter to low tension battery,
After ensureing that electric automobile is parked for a long time, it can also cause the normal startup of vehicle.Meanwhile in the embodiment of the present invention, in VBU
After the power-off for performing KL30 relays, into park mode, so as to further extend the electric quantity consumption of low tension battery.
It should be appreciated that although this specification is described according to each embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical scheme in each embodiment may also be suitably combined to form people in the art
The other embodiment that member is appreciated that.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
It is bright, and and be not used to limit the scope of the invention, all equivalent embodiments made without departing from skill spirit of the present invention or
Change, such as the combination, segmentation or repetition of feature, should be included in the scope of the protection.
Claims (10)
- A kind of 1. electric automobile low tension battery management system, it is characterised in that including：Voltage sensor (11), the voltage sensor (11) is installed on low tension battery (2), to detect the low tension battery (2) voltage；High-low pressure direct current transducer (12), the high-low pressure direct current transducer (12) is connected to the low tension battery (2), and leads to The electrokinetic cell (3) that first contactor (14) is connected to the electric automobile is crossed, the control terminal of the first contactor (14) connects It is connected to microprocessor VBU (13)；The VBU (13) is connected with the voltage sensor (11), and is powered by the low tension battery (2), the VBU (13) The break-make of the first contactor (14) is controlled according to the voltage of the low tension battery (2), and then controls the low pressure electric power storage The charged state in pond (2).
- 2. electric automobile low tension battery management system according to claim 1, it is characterised in that VBU (13) root The break-make of the first contactor (14) is controlled according to the voltage of the low tension battery (2), and then controls the low tension battery (2) charged state, including：When the voltage of the low tension battery (2) is less than feed threshold limit value, the VBU (13) controls the first contactor (14) connect so that the electrokinetic cell (3) is filled by the high-low pressure direct current transducer (12) to the low tension battery (2) Electricity, and charging duration is determined according to the capacity and the feed threshold limit value of the low tension battery (2), filled when reaching described After electric duration, the VBU (13) controls the first contactor (14) to disconnect, to stop the charging of the low tension battery (2).
- 3. electric automobile low tension battery management system according to claim 2, it is characterised in that：The VBU (13) also respectively with KL15 signal ends (41), CC signal ends (42), CP signal ends (43), CC2 signal ends (44) Connection, also, the VBU (13) is additionally coupled to the control terminal of KL30 relays (45)；Judge that the voltage of the low tension battery (2) is not have KL15 signals, and CC believes whether less than feed threshold limit value Number, CP signals and CC2 signals also carry out without in the case of.
- 4. electric automobile low tension battery management system according to claim 3, it is characterised in that：In the case of the vehicle power supply power-fail of the electric automobile, after power down postpones the first duration, VBU (13) control The KL30 relays (45) disconnect, and the VBU (13) enters park mode afterwards.
- 5. the electric automobile low tension battery management method according to any one of Claims 1-4, it is characterised in that：The low tension battery (2) is 12V batteries.
- 6. a kind of electric automobile low tension battery management method, including：By first contactor and high-low pressure direct current transducer, the electrokinetic cell of the electric automobile is connected to the low pressure and stored Battery；Detect the voltage of the low tension battery；VBU controls the break-make of the first contactor according to the voltage of the low tension battery, and then controls the low pressure electric power storage The charged state in pond.
- 7. electric automobile low tension battery management method according to claim 6, it is characterised in that VBU is according to described low Press the voltage of battery to control the break-make of the first contactor, and then control the charged state of the low tension battery, including：When the voltage of the low tension battery is less than feed threshold limit value, the VBU controls the first contactor to connect, and makes The electrokinetic cell is obtained to charge to the low tension battery by the high-low pressure direct current transducer, and according to the low pressure electric power storage Tankage and the feed threshold limit value determine the duration that is charged to the low tension battery, when reaching the duration Afterwards, the VBU controls the first contactor to disconnect, to stop the charging to the low tension battery.
- 8. electric automobile low tension battery management system according to claim 7, it is characterised in that methods described is also wrapped Include：VBU monitoring KL15 signals, CC signals, CP signals and the CC2 signals；Judge that the voltage of the low tension battery is that the VBU is not having KL15 signals whether less than threshold limit value is fed, and What CC signals, CP signals and CC2 signals were also carried out without in the case of.
- 9. electric automobile low tension battery management method according to claim 8, it is characterised in that methods described is also wrapped Include：In the case of vehicle power supply power-fail, after power down postpones the first duration, the VBU control KL30 relays disconnect, it The VBU enters park mode afterwards.
- 10. electric automobile low tension battery management method according to claim 9, it is characterised in that：When the KL15 signals be present, the KL15 signals wake up the VBU, and afterwards, the VBU controls the KL30 relays The closure of device；When carrying out the charging of the electric automobile：If trickle charge state, then the CC signals and CP signals wake up the VBU, and afterwards, the VBU controls the KL30 relays The closure of device；If fast charge state, then the CC2 signals wake up the VBU, and afterwards, the VBU controls closing for the KL30 relays Close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710669408.1A CN107640031A (en) | 2017-08-08 | 2017-08-08 | Electric automobile low tension battery management system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710669408.1A CN107640031A (en) | 2017-08-08 | 2017-08-08 | Electric automobile low tension battery management system and method |
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| CN107640031A true CN107640031A (en) | 2018-01-30 |
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| CN201710669408.1A Pending CN107640031A (en) | 2017-08-08 | 2017-08-08 | Electric automobile low tension battery management system and method |
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| CN109107064A (en) * | 2018-08-24 | 2019-01-01 | 北京新能源汽车股份有限公司 | Automatic fire control unit of power battery and car |
| CN109501636A (en) * | 2018-12-10 | 2019-03-22 | 山东国金汽车制造有限公司 | A kind of electric vehicle prevents small storage battery feed method when charging |
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| CN113771689A (en) * | 2021-09-06 | 2021-12-10 | 东风柳州汽车有限公司 | Vehicle storage battery feed starting control method and device and electric vehicle |
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Application publication date: 20180130 |