CN214295476U - Braking energy catcher for hydrogen fuel cell automobile - Google Patents
Braking energy catcher for hydrogen fuel cell automobile Download PDFInfo
- Publication number
- CN214295476U CN214295476U CN202120132028.6U CN202120132028U CN214295476U CN 214295476 U CN214295476 U CN 214295476U CN 202120132028 U CN202120132028 U CN 202120132028U CN 214295476 U CN214295476 U CN 214295476U
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- Prior art keywords
- fuel cell
- heating
- controller
- braking energy
- hydrogen fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 35
- 239000001257 hydrogen Substances 0.000 title claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000009499 grossing Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000010257 thawing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 4
- 210000004027 cell Anatomy 0.000 description 34
- 238000011084 recovery Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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- Fuel Cell (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses a braking energy trapper for hydrogen fuel cell car, this braking energy trapper pass through high voltage direct current bus connection to the whole car on the high voltage direct current bus, in vehicle braking process, the braking energy trapper can select the machine to utilize on the high voltage direct current bus unnecessary braking repayment electric energy to provide the electric energy for the heating element in the heating chamber, and heating element is used for heating the circulating water in the warm braw heat supply pipeline. Through the utility model provides a "control current limit voltage", under the prerequisite of guaranteeing that lithium ion power battery does not overcharge, come for the warm braw heating device energy supply through the braking energy of effective recycle whole car to improve the efficiency and the fuel economy of whole car, reduced the hydrogen consumption of hydrogen fuel cell car.
Description
Technical Field
The utility model belongs to the technical field of the car, a hydrogen fuel cell vehicle air conditioner is warm to be led to is related to, concretely relates to braking energy trapper for hydrogen fuel cell car.
Background
The hydrogen fuel cell automobile has the advantages of zero emission, high energy conversion efficiency, wide energy source, high hydrogenation speed, good low-temperature adaptability and the like, and is increasingly emphasized at home and abroad in recent years, so that China more attaches importance to the development of the hydrogen fuel cell automobile as an important field for the demonstration application and popularization of new energy automobiles. Particularly, in winter in northern alpine regions, hydrogen fuel cell vehicles have better environmental adaptability than pure electric vehicles provided with lithium ion power batteries, and from 6 months in 2018, hundreds of hydrogen fuel cell buses and commercial vehicles are put into large-scale commercial demonstration operation in Beijing Ji regions in northern China.
At present, hydrogen fuel cell vehicles which are operated in a demonstration mode in Jingjin Ji area all adopt a hydrogen-electricity hybrid driving mode, namely, the whole vehicle is also provided with a lithium ion power battery with certain electric quantity besides a fuel cell system, so that the power of the fuel cell system of the whole vehicle equipment is favorably reduced, the cost of the whole vehicle is reduced, and the possibility of improving the energy efficiency of the whole vehicle through the recovery of braking energy is provided. In the low-temperature environment in winter, the passenger compartment of these hydrogen fuel cell vehicles is mainly heated by electric heating, and usually the electric energy required for heating is mainly provided by a fuel cell system for power generation or a lithium ion power battery, which often results in a significant increase in the hydrogen consumption of the fuel cell vehicle per hundred kilometers. Meanwhile, the lower air temperature often causes the working temperature of the lithium ion power battery to be lower, and the maximum allowable charging power of the lithium ion power battery is reduced, so that the effect of improving the energy efficiency of the whole vehicle through the recovery of braking energy is greatly reduced. On one hand, the whole vehicle consumes a large amount of electric energy due to electric heating, on the other hand, the recovery of braking energy is limited due to the reduction of the charging capacity of the lithium ion power battery, and the factors are superposed together, so that the improvement of the energy efficiency of the hydrogen fuel battery vehicle running in winter in northern areas becomes very difficult, and the adoption of the braking energy catcher is an effective way for solving the problems.
For a conventional hydrogen fuel cell electric vehicle, during braking energy recovery, the braking feedback power generation of a driving motor mainly depends on the maximum allowable charging power of a lithium ion power battery, and when the maximum allowable charging power of the lithium ion power battery is reduced due to low temperature, the braking feedback power generation of the driving motor is also reduced, so that the lithium ion power battery is prevented from being overcharged, and the effect of braking energy recovery is reduced. After the braking energy catcher is adopted, the driving motor can generate larger electric power during braking feedback power generation in the braking process, the electric power is partially absorbed by the lithium ion power battery and the high-voltage accessory, and the rest electric power can be used for heating circulating water in a warm air heat supply pipeline, so that electric heating is prevented from directly consuming the electric energy of the fuel battery or the lithium ion power battery to a certain extent, the energy efficiency of the whole vehicle is improved, and the hydrogen consumption of the whole vehicle is reduced.
However, one difficulty of using a braking energy catcher is how to avoid the problem of overcharge of the lithium ion power battery, and in the low temperature condition in winter, overcharge of the lithium ion power battery not only affects the service life of the battery, but also easily causes lithium dendrite to be generated inside the battery cell, causes short circuit and thermal runaway inside the battery cell, and seriously causes fire accidents and personal property loss of the hydrogen fuel cell automobile.
In summary, it is a problem to be solved urgently how to provide a brake energy catcher for a hydrogen fuel cell vehicle, which can improve the heating effect of the passenger compartment and improve the energy efficiency of the entire vehicle by recovering as much brake energy as possible on the premise of ensuring that the lithium ion power battery is not overcharged.
SUMMERY OF THE UTILITY MODEL
In order to overcome a series of defects in the prior art, the present invention provides a braking energy catcher for a hydrogen fuel cell vehicle, which comprises a controller 2, a heating chamber 3 and a heating driver 6, and is characterized in that,
signals are arranged outside and inside the controller 2;
the heating chamber 3 is connected in series on a warm air heating pipeline;
the heating driver 6 is connected to a high voltage dc bus 14 via a high voltage dc bus.
Preferably, the external analog input signals of the controller 2 are a 24VDC power supply, a defrost switch, a warm air switch, and a brake switch.
Preferably, the internal input/output signals of the controller 2 include a signal of the heating chamber temperature sensor 4, a signal of the heating driver temperature sensor 11, and a signal I of the heating driver current sensor 9cSignal V of the heating driver voltage sensor 10cAnd a gate control signal G of the heater driver power electronic switch 7.
Preferably, a fuel cell DC-DC converter 17, a lithium ion power battery 16, a high-voltage accessory controller 15 and a motor controller 13 are further connected to the high-voltage direct current bus 14.
Preferably, the controller 2 is connected with a fuel cell system controller 18, a fuel cell DC-DC converter 17, a management system of the lithium ion power battery 16, a high voltage accessory controller 15, a motor controller 13, a vehicle controller 19 and an air conditioner controller 20 through a CAN bus or other communication buses.
Preferably, the heating chamber 3 is provided with a high-pressure heating element 5 inside for heating the circulating water in the heat supply pipeline.
Preferably, a filtering smoothing capacitor 8 is arranged inside the heating driver 6 and is used for eliminating a glitch signal on the high-voltage direct-current bus.
Compared with the prior art, the utility model discloses possess following beneficial effect:
1) the utility model discloses a trapper, its controller is according to the utility model provides a control algorithm, analysis calculation obtains control variables such as braking repayment demand power, braking energy trapper heating power, high voltage direct current bus control voltage and braking energy trapper heating current, rethread the utility model provides a "control current limit voltage" control method, under the prerequisite of guaranteeing that lithium ion power battery does not overcharge, comes to supply energy for the warm braw heating device through the effective brake energy of recycle whole car to improve the efficiency and the fuel economy of whole car, reduced the hydrogen consumption of hydrogen fuel cell car;
2) the utility model discloses broken through traditional hydrogen fuel cell car and confirmed the restriction of braking repayment power according to the lithium ion power battery maximum allowable charging power, under the prerequisite of guaranteeing that lithium ion power battery is not overcharged, can make whole car produce bigger braking repayment power in braking process, and utilize unnecessary braking repayment power to come for the energy supply of electric heat warm braw system, this method is particularly suitable for all kinds of hydrogen fuel cell cars of operation in the cold area in the north, fuel economy and riding comfort to improving and improve hydrogen fuel cell car have important engineering practical application and worth.
3) The utility model provides a method for carrying out safety protection on the working process of a braking energy catcher by utilizing a built-in temperature sensor signal, which ensures the safe working of the braking energy catcher;
4) the utility model provides a method for determining the capturing heating power of a braking energy catcher according to the maximum allowable charging power of a lithium ion power battery, the idle power of a fuel battery, the power of a high-voltage accessory, the heating demand power of warm air and the maximum allowable braking feedback power of a whole vehicle;
5) the utility model provides a method for confirming high voltage direct current bus control voltage and braking energy trapper operating current based on lithium ion power battery maximum allowable charging power, open circuit voltage, charge-discharge internal resistance and seizure heating power.
Drawings
Fig. 1 is a schematic diagram of a control method of a braking energy catcher for a hydrogen fuel cell vehicle according to the present invention.
The reference numbers in the figures are:
1-a braking energy catcher, 2-a controller, 3-a heating chamber, 4-a heating chamber temperature sensor, 5-a high-voltage heating element, 6-a heating driver, 7-a heating driver power electronic switch, 8-a filtering smoothing capacitor, 9-a heating driver current sensor, 10-a heating driver voltage sensor, 11-a heating driver temperature sensor, 12-a driving motor, 13-a motor controller, 14-a high-voltage direct current bus, 15-a high-voltage accessory controller, 16-a lithium ion power battery, 17-a fuel cell DC-DC converter, 18-a fuel cell system controller, 19-a whole vehicle controller and 20-an air conditioner controller.
Detailed Description
In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following describes the braking energy catcher for a hydrogen fuel cell vehicle in detail with reference to the accompanying drawings.
As shown in fig. 1, a braking energy catcher for a hydrogen fuel cell automobile comprises a controller 2, a heating chamber 3 and a heating driver 6, and is characterized in that,
signals are arranged outside and inside the controller 2;
the heating chamber 3 is connected in series on a warm air heating pipeline;
the heating driver 6 is connected to a high voltage dc bus 14 via a high voltage dc bus.
Preferably, the external analog input signals of the controller 2 are a 24VDC power supply, a defrost switch, a warm air switch, and a brake switch.
Preferably, the internal input/output signals of the controller 2 include a signal of the heating chamber temperature sensor 4, a signal of the heating driver temperature sensor 11, and a signal I of the heating driver current sensor 9cSignal V of the heating driver voltage sensor 10cAnd a gate control signal G of the heater driver power electronic switch 7.
Preferably, a fuel cell DC-DC converter 17, a lithium ion power battery 16, a high-voltage accessory controller 15 and a motor controller 13 are further connected to the high-voltage direct current bus 14.
Preferably, the controller 2 is connected with a fuel cell system controller 18, a fuel cell DC-DC converter 17, a management system of the lithium ion power battery 16, a high voltage accessory controller 15, a motor controller 13, a vehicle controller 19 and an air conditioner controller 20 through a CAN bus or other communication buses.
Preferably, the heating chamber 3 is provided with a high-pressure heating element 5 inside for heating the circulating water in the heat supply pipeline.
Preferably, a filtering smoothing capacitor 8 is arranged inside the heating driver 6 and is used for eliminating a glitch signal on the high-voltage direct-current bus.
Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A braking energy catcher for a hydrogen fuel cell automobile comprises a controller (2), a heating chamber (3) and a heating driver (6),
signals are arranged outside and inside the controller (2);
the heating chamber (3) is connected in series on a warm air heating pipeline;
the heating driver (6) is connected to a high-voltage direct-current bus (14) through a high-voltage direct-current bus.
2. The braking energy catcher for the hydrogen fuel cell automobile according to claim 1,
the external analog input signals of the controller (2) comprise a 24VDC power supply, a defrosting switch, a warm air switch and a brake switch.
3. The braking energy capture device for the hydrogen fuel cell automobile according to claim 1 or 2,
the internal input and output signals of the controller (2) comprise a signal of a heating chamber temperature sensor (4), a signal of a heating driver temperature sensor (11) and a signal I of a heating driver current sensor (9)cSignal V of the heating driver voltage sensor (10)cAnd a gate control signal G of the heater driver power electronic switch (7).
4. The braking energy catcher for the hydrogen fuel cell automobile according to claim 1, characterized in that a fuel cell DC-DC converter (17), a lithium ion power battery (16), a high voltage accessory controller (15) and a motor controller (13) are further connected to the high voltage direct current bus (14).
5. The braking energy catcher for the hydrogen fuel cell automobile according to claim 1, wherein the controller (2) is connected with a fuel cell system controller (18), a fuel cell DC-DC converter (17), a management system of a lithium ion power battery (16), a high-voltage accessory controller (15), a motor controller (13), a vehicle controller (19) and an air conditioner controller (20) through a CAN bus or other communication buses.
6. The braking energy catcher for the hydrogen fuel cell automobile according to claim 1, wherein the heating chamber (3) is internally provided with a high-pressure heating element (5) for heating circulating water in a heat supply pipeline.
7. The braking energy catcher for the hydrogen fuel cell automobile as claimed in claim 1, characterized in that the heating driver (6) is internally provided with a smoothing capacitor (8) for filtering and smoothing out glitches on the high voltage direct current bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120132028.6U CN214295476U (en) | 2021-01-18 | 2021-01-18 | Braking energy catcher for hydrogen fuel cell automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120132028.6U CN214295476U (en) | 2021-01-18 | 2021-01-18 | Braking energy catcher for hydrogen fuel cell automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214295476U true CN214295476U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120132028.6U Expired - Fee Related CN214295476U (en) | 2021-01-18 | 2021-01-18 | Braking energy catcher for hydrogen fuel cell automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793385A (en) * | 2021-01-18 | 2021-05-14 | 清华大学 | Braking energy catcher for hydrogen fuel cell automobile and control method thereof |
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2021
- 2021-01-18 CN CN202120132028.6U patent/CN214295476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793385A (en) * | 2021-01-18 | 2021-05-14 | 清华大学 | Braking energy catcher for hydrogen fuel cell automobile and control method thereof |
| CN112793385B (en) * | 2021-01-18 | 2024-06-11 | 清华大学 | Brake energy catcher for hydrogen fuel cell automobile and control method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 |
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| CF01 | Termination of patent right due to non-payment of annual fee |