CN214799009U - Integrated low-voltage energy storage power supply system for vehicle - Google Patents
Integrated low-voltage energy storage power supply system for vehicle Download PDFInfo
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- CN214799009U CN214799009U CN202121234589.3U CN202121234589U CN214799009U CN 214799009 U CN214799009 U CN 214799009U CN 202121234589 U CN202121234589 U CN 202121234589U CN 214799009 U CN214799009 U CN 214799009U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an automobile-used integrated form low pressure energy storage electrical power generating system, include: a storage battery; the input end of the power supply main switch is connected with the anode of the storage battery, and the cathode of the storage battery is the common ground of the whole vehicle; the input end of the charging relay is connected with the output end of the power supply main switch; the output end is grounded; the input end of the current limiting resistor is connected with the output end of the charging relay; the super capacitor module is formed by connecting a plurality of super capacitors in series and parallel; a relay is connected in parallel; the output end of the starter is connected with a starter of an engine of the whole vehicle; the parallel relay can enable the output end of the power supply main switch to be connected with the anode of the super capacitor module in parallel; the input end of the starter is connected with the output end of the current-limiting resistor, the output end of the parallel relay and the positive end of the super capacitor module. The charging current-limiting control can be realized, and the starting success rate is improved.
Description
Technical Field
The utility model relates to an automobile-used integrated form low pressure energy storage electrical power generating system belongs to automotive electronics electrical apparatus field.
Background
The vehicle-mounted low-voltage electric energy storage device is used as an important component of an automobile electrical appliance, and has the functions of providing starting current for a starter when an engine is started in the starting process, assisting the generator to supply power to electric equipment when the generator is overloaded, supplying power to the electric equipment when the engine is in idle speed, maintaining the voltage stability of the whole automobile, storing electric energy when the voltage of the generator end is higher than that of a lead storage battery and the like. It is required to have certain energy density and power density, and simultaneously have lower cost and higher reliability.
As a vehicle-mounted electric energy storage device which is most widely applied, the lead-acid storage battery has the advantages of low cost, good reliability, high stability and the like. Under the working condition of a vehicle in a cold region, the viscosity of engine oil is increased and water vapor is condensed due to low temperature, and the starting resistance of an engine is large; meanwhile, the activity of the anode and cathode materials of the storage battery is reduced due to low temperature, and the discharge capacity is weakened. Multiple factors contribute to engine starting difficulties at low temperatures. Vehicles with engine start and stop capability that are matched have a relatively short life due to the frequent use of battery power for engine starting.
The super capacitor is used as a novel electric energy storage device, is different from a traditional chemical power supply, can reversibly store and release electric energy through physical change, has the advantages of high charging speed, long cycle life, large kilometer density, good ultralow temperature and the like, and has the limitation on application scenes due to the problems of low energy density, high self-discharge rate, need of a special charging circuit and the like.
Aiming at the requirements that the vehicle-mounted low-voltage energy storage power supply system supplies power to a large current of a starter under the working condition of a cold region, frequently starts and supplies power under the working condition of starting and stopping, supplies power to a low-voltage energy storage power supply under the conventional working condition of a vehicle and the like, the vehicle-mounted low-voltage energy storage power supply system which gives consideration to power density, energy density, reliability, stability and cost is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a developed an automobile-used integrated form low pressure energy storage electrical power generating system, through increase controllable charging relay and parallelly connected relay between battery and super capacitor module, can realize the current limiting control that charges, improve the start-up success rate by a wide margin, satisfy the needs that vehicle low pressure electric energy was stored.
The utility model provides a technical scheme does:
an integrated low-voltage energy storage power supply system for a vehicle, comprising:
a storage battery;
the input end of the power supply main switch is connected with the positive end of the storage battery, and the negative end of the storage battery is connected with the ground of the whole vehicle;
the input end of the charging relay is connected with the output end of the power supply main switch; the control end is grounded;
the input end of the current limiting resistor is connected with the output end of the charging relay;
the positive end of the super capacitor module is connected with the output end of the current-limiting resistor;
the input end of the parallel relay is connected with the input end of the charging relay and the output end of the power supply main switch, and the output end of the parallel relay is connected with the positive end of the super capacitor module;
the input end of the starter is connected with the output end of the current-limiting resistor, the output end of the parallel relay and the positive end of the super capacitor module, and the output end of the starter is connected with the whole vehicle engine;
and the power supply control unit is electrically connected with the storage battery, the super capacitor module, the parallel relay and the charging relay at the same time and can control the on-off of the parallel relay and the charging relay.
Preferably, the method further comprises the following steps: and the power supply control unit is communicated with the whole vehicle through the communication line.
Preferably, the method further comprises the following steps:
one end of the storage battery sampling line is connected with the output end of the power supply main switch;
one end of the super capacitor sampling line is connected with the super capacitor module;
one end of the parallel relay control line is connected with the control end of the parallel relay;
one end of the charging relay control line is connected with the control end of the charging relay;
the power supply control unit is connected with the other end of the storage battery sampling line, the other end of the super capacitor sampling line, the other end of the parallel relay control line and the other end of the charging relay control line at the same time.
Preferably, the battery is a lead-acid battery or a lithium battery pack.
Preferably, the power supply main switch is a manual power supply main switch or an electric power supply main switch.
Preferably, the communication line is a CAN communication bus.
Beneficial effect:
1. the charging relay and the current-limiting resistor are used for realizing the charging current-limiting control of the super capacitor module, so that the charging circuit is stable and reliable and has low cost;
2. the parallel relay can realize the parallel connection of the storage battery and the super capacitor module, so that the starting failure when the voltage or the electric quantity of the super capacitor module is lower is avoided, and the starting success rate is greatly improved;
3. when the system outputs large current, the large current only comes from the super capacitor module or most of the large current comes from the super capacitor module, the storage battery has no large current output requirement, the capacity of the storage battery can be greatly reduced, the weight and cost reduction of the battery system is realized, and meanwhile, the storage battery with certain capacity meets the requirement of vehicle low-voltage electric energy storage;
4. the pressure difference between the two ends is checked in real time before the parallel relay is closed, when the pressure difference is larger, the parallel relay is closed when the pressure difference meets the requirement, and electric shock ablation of the relay caused by overlarge pressure difference is avoided;
5. the power supply control unit carries out logic judgment on the super capacitor module voltage, the storage battery voltage, the lowest super capacitor allowed voltage required by engine starting and the like and a charging process after receiving the starting request signal, and outputs a starting release signal after closing the relay, and no relay is closed or opened in the starting process, so that the relay is prevented from being damaged when being closed or opened with load;
6. the lowest allowable voltage value of the super capacitor required by the starting of the engine is obtained according to the calibrated MAP (EngTemp, UCV) table lookup operation, and is used as an important control target to perform strategy intervention on the charging and discharging of the system, so that the success rate of the starting of the system is effectively improved;
7. the controllable charging relay and the parallel relay are added between the storage battery and the super capacitor module, the power main switch is closed for a long time, the generator does not work, namely, when the engine is not started, the power control unit actively disconnects the charging relay and the parallel relay, and the storage battery feed caused by the leakage current of the super capacitor module is avoided.
Drawings
Fig. 1 is the schematic diagram of the principle of the integrated low-voltage energy storage power supply system for the vehicle.
Fig. 2 is the utility model discloses a principle schematic diagram that automobile-used integrated form low pressure energy storage electrical power generating system is applied to on the car.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1-2, the utility model provides an automobile-used integrated form low pressure energy storage electrical power generating system through increasing controllable charging relay and parallelly connected relay between battery and super capacitor module, can realize the current limiting control that charges, improves the start-up success rate by a wide margin, satisfies the needs that vehicle low pressure electric energy was stored. The method comprises the following steps: the system comprises a storage battery 1, a power supply main switch 2, a power supply control unit 3, a starter 4, a parallel relay 5, a current-limiting resistor 6, a charging relay 7, a super capacitor module 8, a storage battery sampling line 101, a parallel relay control line 102, a charging relay control line 103, a super capacitor sampling line 104 and a communication line 201.
The positive pole of the storage battery 1 is connected with the input end of the power supply main switch 2, and the negative pole is the common ground of the whole vehicle; the input end of the charging relay 7 is connected with the output end of the power main switch 2, the control end is grounded, the input end of the current-limiting resistor 6 is connected with the output end of the charging relay 7, and the output end of the current-limiting resistor 6 is connected with the anode of the super capacitor module 8; one end of the parallel relay 5 is simultaneously connected with the input end of the charging relay 7 and the output end of the power main switch 2, and the other end is connected with the positive end of the super capacitor module 8; the input end of the starter 4 is connected with the output end of the current-limiting resistor 6, the output end of the parallel relay 5 and the positive end of the super capacitor module, and the output end of the starter 4 is connected with a whole vehicle engine; the power control unit 3 is simultaneously and electrically connected with the storage battery 1, the super capacitor module 8, the parallel relay 5 and the charging relay, and can control the on-off of the parallel relay 5 and the charging relay 7.
The battery 1 is a main electric energy storage device of the integrated low-voltage energy storage power supply system, and as a preferred option, a lead-acid storage battery is selected;
in another embodiment, a lithium battery is selected.
The power supply main switch 2 can realize on-off control of the output electric energy of the storage battery 1, and a manual power supply main switch or an electric power supply main switch can be selected; the positive pole of the storage battery 1 is connected with the input end of the power main switch 2, and the negative pole is the common ground of the whole vehicle; the power supply control unit 3 is a physical carrier for system control and strategy implementation, and realizes acquisition of signal quantity, strategy operation, control quantity output and the like.
The charging relay 7 realizes the on-off of the current flowing through the charging loop, and the input end of the charging relay is connected with the output end of the power main switch 2.
The utility model discloses in, as an optimization, charging relay 7's control end one end ground connection uses high limit drive signal to switch on and off control.
The current limiting resistor 6 realizes the current limiting control of the current flowing through, avoids the overlarge current at the moment of charging when the voltage difference is overlarge, and the input end of the current limiting resistor 6 is connected with the output end of the charging relay 7; the super capacitor module 8 is formed by connecting a plurality of super capacitors in series and parallel, and the rated voltage is not lower than the highest voltage of the storage battery 1.
The parallel relay 5 realizes that the output end of the power supply main switch 2 is connected with the anode of the super capacitor module 8 in parallel; the present invention is preferably configured such that the control terminal of the parallel relay 5 is grounded and the high-side drive signal is used to perform on/off control.
The output end 9 of the starter is connected with a starter of the engine of the whole vehicle, supplies power for the starter in the working process, and is connected with the output end of the current-limiting resistor 6, the output end of the parallel relay 5 and the positive end of the super capacitor module 8.
One end of a storage battery sampling line 101 is connected with the output end of a power supply main switch, one end of a super capacitor sampling line 104 is connected with a super capacitor module, one end of a parallel relay control line 102 is connected with the control end of a parallel relay 5, and one end of a charging relay control line 103 is connected with the control end of a charging relay 7; the power supply control unit 3 is connected with the other end of the storage battery sampling line 101, the other end of the super capacitor sampling line 104, the other end of the parallel relay control line 102 and the other end of the charging relay control line 103 at the same time.
The power supply control unit 3 collects the voltage of the storage battery through a storage battery sampling line 101 connected with the output end of the power supply main switch; collecting the voltage of the super capacitor module 8 through a super capacitor sampling line 104 connected with the anode of the super capacitor module 8; the on and off control of the parallel relay 5 is realized through a parallel relay control line 102 connected to the control end of the parallel relay 5; on and off control of the charging relay 7 is realized via a charging relay control line 103 connected to a control terminal of the charging relay 7.
Examples
As shown in fig. 2, will the utility model provides an automobile-used integrated low pressure energy storage electrical power generating system is applied to on the car, include: the system comprises a storage battery 11, a power supply main switch 12, a power supply control unit 13, a parallel relay 15, a current-limiting resistor 16, a charging relay 17, a super capacitor module 18, a storage battery sampling line 1001, a parallel relay control line 1002, a charging relay control line 1003, a super capacitor sampling line 1004 and a communication line 2001; also included are a starter 14, an onboard load 19, and an engine-mounted generator 20.
One end of the starter 14 is connected with the output end of the integrated low-voltage energy storage power supply system for the vehicle, and the power supply system supplies power to the starter 14; the vehicle-mounted load 9 is electric equipment of the whole vehicle, one end of the vehicle-mounted load 9 is connected with the storage battery 10 and the engine onboard generator 20, and the vehicle-mounted load 19 can be supplied with power through the storage battery 10 and the engine onboard generator 20; the engine-mounted generator 20 supplies power to the on-board load 19 through the generator when the vehicle starts, and charges the storage battery 10 and the super capacitor module 18.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. An integrated low-voltage energy storage power supply system for a vehicle, comprising:
a storage battery;
the input end of the power supply main switch is connected with the positive end of the storage battery, and the negative end of the storage battery is connected with the ground of the whole vehicle;
the input end of the charging relay is connected with the output end of the power supply main switch; the control end is grounded;
the input end of the current limiting resistor is connected with the output end of the charging relay;
the positive end of the super capacitor module is connected with the output end of the current-limiting resistor;
the input end of the parallel relay is connected with the input end of the charging relay and the output end of the power supply main switch, and the output end of the parallel relay is connected with the positive end of the super capacitor module;
the input end of the starter is connected with the output end of the current-limiting resistor, the output end of the parallel relay and the positive end of the super capacitor module, and the output end of the starter is connected with the whole vehicle engine;
and the power supply control unit is electrically connected with the storage battery, the super capacitor module, the parallel relay and the charging relay at the same time and can control the on-off of the parallel relay and the charging relay.
2. The integrated low-voltage energy storage power supply system for the vehicle according to claim 1, further comprising: and the power supply control unit is communicated with the whole vehicle through the communication line.
3. The integrated low-voltage energy storage power supply system for the vehicle of claim 2, further comprising:
one end of the storage battery sampling line is connected with the output end of the power supply main switch;
one end of the super capacitor sampling line is connected with the super capacitor module;
one end of the parallel relay control line is connected with the control end of the parallel relay;
one end of the charging relay control line is connected with the control end of the charging relay;
the power supply control unit is connected with the other end of the storage battery sampling line, the other end of the super capacitor sampling line, the other end of the parallel relay control line and the other end of the charging relay control line at the same time.
4. The integrated low-voltage energy storage power system for the vehicle of claim 3, wherein the battery is a lead-acid battery or a lithium battery pack.
5. The integrated low-voltage energy storage power supply system for the vehicle as claimed in claim 4, wherein the power main switch is a manual power main switch or an electric power main switch.
6. The integrated low-voltage energy storage power supply system for the vehicle according to claim 5, wherein the communication line is a CAN communication bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121234589.3U CN214799009U (en) | 2021-06-03 | 2021-06-03 | Integrated low-voltage energy storage power supply system for vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121234589.3U CN214799009U (en) | 2021-06-03 | 2021-06-03 | Integrated low-voltage energy storage power supply system for vehicle |
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| CN214799009U true CN214799009U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178934A (en) * | 2021-06-03 | 2021-07-27 | 吉林大学 | Integrated low-voltage energy storage power supply system for vehicle and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178934A (en) * | 2021-06-03 | 2021-07-27 | 吉林大学 | Integrated low-voltage energy storage power supply system for vehicle and control method thereof |
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