CN115208036A - Electric wheelchair and energy recovery system thereof - Google Patents
Electric wheelchair and energy recovery system thereof Download PDFInfo
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- CN115208036A CN115208036A CN202110398751.3A CN202110398751A CN115208036A CN 115208036 A CN115208036 A CN 115208036A CN 202110398751 A CN202110398751 A CN 202110398751A CN 115208036 A CN115208036 A CN 115208036A
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- battery pack
- power battery
- voltage conversion
- conversion module
- super capacitor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an electric wheelchair and an energy recovery system thereof, wherein the system comprises: the system comprises a power battery pack, a super capacitor, a first voltage conversion module, a second voltage conversion module and a control module, wherein the first voltage conversion module is respectively connected with the power battery pack, the super capacitor and a driving motor and is used for converting alternating current output by the driving motor into direct current to charge the power battery pack or the super capacitor; the second voltage conversion module is respectively connected with the super capacitor and the power battery pack and used for performing voltage boosting and reducing processing on the direct current output by the super capacitor to charge the power battery pack; the control module is respectively connected with the first voltage conversion module and the second voltage conversion module and used for controlling the first voltage conversion module and the second voltage conversion module according to the electric quantity of the power battery pack so as to recover energy, and therefore the driving range of the electric wheelchair can be effectively improved.
Description
Technical Field
The invention relates to the technical field of electric wheelchairs, in particular to an electric wheelchair and an energy recovery system thereof.
Background
With the improvement of the safety and reliability of the new energy lithium battery, products related to applications such as an electric shifting machine, an electric scooter, an electric wheelchair and the like are endless, but the performance of the power battery at the present stage still has technical bottlenecks, for example, with the decline of the performance of the power battery, the driving range of the electric wheelchair is significantly reduced, especially under the driving conditions such as frequent starting, acceleration, braking and the like, the energy consumption of the electric wheelchair is increased, the driving range is significantly shortened, and the use of the electric wheelchair is severely limited.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide an energy recovery system for an electric wheelchair, which can effectively improve the driving range of the electric wheelchair.
A second object of the present invention is to provide an electric wheelchair.
In order to achieve the above object, a first aspect of the present invention provides an energy recovery system for an electric wheelchair, comprising: the system comprises a power battery pack, a super capacitor, a first voltage conversion module, a second voltage conversion module and a control module, wherein the first voltage conversion module is respectively connected with the power battery pack, the super capacitor and a driving motor and is used for converting alternating current output by the driving motor into direct current to charge the power battery pack or the super capacitor; the second voltage conversion module is respectively connected with the super capacitor and the power battery pack and used for performing voltage boosting and reducing processing on direct current output by the super capacitor to charge the power battery pack; the control module is respectively connected with the first voltage conversion module and the second voltage conversion module and used for controlling the first voltage conversion module and the second voltage conversion module according to the electric quantity of the power battery pack so as to recover energy.
According to the energy recovery system of the electric wheelchair, the first voltage conversion module and the second voltage conversion module are controlled by the control module according to the electric quantity of the power battery pack so as to charge the power battery or the super capacitor, so that the energy recovery of the electric wheelchair can be realized, and the driving range of the electric wheelchair can be effectively improved.
According to an embodiment of the present invention, the control module, when controlling the first voltage conversion module and the second voltage conversion module for energy recovery according to the power amount of the power battery pack, is specifically configured to: when the electric quantity of the power battery pack is larger than or equal to a first preset electric quantity, the first voltage conversion module is controlled to convert alternating current output by the driving motor into direct current to charge the super capacitor, and when the electric quantity of the power battery pack is smaller than the first preset electric quantity, the second voltage conversion module is controlled to boost the direct current output by the super capacitor and charge the power battery pack; when the electric quantity of the power battery pack is smaller than a first preset electric quantity, the first voltage conversion module is controlled to convert the alternating current output by the driving motor into direct current to charge the power battery pack.
According to one embodiment of the present invention, a first voltage conversion module includes: the input end of the rectifying unit is connected with the driving motor; the input end of the first DCDC conversion unit is connected with the output end of the rectification unit, and the output end of the first DCDC conversion unit is respectively connected with the power battery pack and the super capacitor.
According to an embodiment of the present invention, the first voltage conversion module further includes: and the first switching unit is connected between the output end of the rectifying unit and the input end of the first DCDC conversion unit.
According to an embodiment of the present invention, the second voltage conversion module includes: and the input end of the second DCDC conversion unit is connected with the super capacitor, and the output end of the second DCDC conversion unit is connected with the power battery pack.
According to an embodiment of the present invention, the second voltage conversion module further includes: and the second switching unit is connected between the super capacitor and the input end of the second DCDC conversion unit.
According to one embodiment of the invention, the power battery pack comprises an energy management system, and the energy management system is connected with the control module and used for acquiring the electric quantity of the power battery pack and sending the electric quantity to the control module.
According to one embodiment of the invention, the energy management system and the control module each comprise a CAN communication unit, and the energy management system sends the electric quantity of the power battery pack to the control module through the CAN communication unit.
According to an embodiment of the present invention, the energy recovery system of the electric wheelchair further includes: the temperature detection module is arranged in the control module and used for detecting the temperature of the control module, and the control module is also used for controlling the driving motor according to the temperature.
In order to achieve the above object, a second aspect of the present invention provides an electric wheelchair including an energy recovery system according to the first aspect.
According to the electric wheelchair disclosed by the embodiment of the invention, the driving range of the electric wheelchair can be effectively improved through the energy recovery system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of an energy recovery system of an electrically powered wheelchair in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural view of an energy recovery system of an electric wheelchair according to another embodiment of the present invention;
fig. 3 is a schematic structural view of an electric wheelchair according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
An electric wheelchair and an energy recovery system thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an energy recovery system of an electric wheelchair according to an embodiment of the present invention. Referring to fig. 1, the energy recovery system of the electric wheelchair includes: the system comprises a power battery pack 10, a super capacitor 20, a first voltage conversion module 30, a second voltage conversion module 40 and a control module 50.
The first voltage conversion module 30 is connected to the power battery pack 10, the super capacitor 20 and the driving motor 60, and is configured to convert ac output by the driving motor 60 into dc to charge the power battery pack 10 or the super capacitor 20; the second voltage conversion module 40 is respectively connected with the super capacitor 20 and the power battery pack 10, and is used for performing voltage boosting and reducing processing on the direct current output by the super capacitor 20 to charge the power battery pack 10; the control module 50 is connected to the first voltage conversion module 30 and the second voltage conversion module 40, respectively, and is configured to control the first voltage conversion module 30 and the second voltage conversion module 40 according to the electric quantity of the power battery pack 10 for energy recovery.
It should be noted that the energy recovery in the application includes braking energy recovery, constant-speed downhill energy recovery and the like, wherein the braking energy recovery can not only prevent a voltage spike generated by emergency braking from damaging a motor controller, but also increase the driving range of the electric wheelchair; the constant-speed downhill energy recovery can keep the electric wheelchair to safely descend at a constant speed, avoid the energy generated by the downhill from damaging a motor controller and a motor, and increase the driving range of the electric wheelchair.
Specifically, during the process of braking or downhill driving of the electric wheelchair, energy recovery may be performed, at this time, the driving motor 60 (e.g., a dc brushless motor) operates in a power generation state, a rotor in the driving motor 60 periodically cuts magnetic induction line motion to form an induced ac power, the ac power is transmitted to the first voltage conversion module 30 connected to the driving motor 60, the control module 50 controls the first voltage conversion module 30 to operate to convert the induced ac power output by the driving motor 60 into a dc power to charge the power battery pack 10 or the super capacitor 20, and in addition, the control module 50 may also control the second voltage conversion module 40 to operate to transmit the electric power of the super capacitor 20 to the power battery pack 10 to ensure that the power battery pack 10 has sufficient electric power, so as to not only prevent the control module 50 from being damaged by a voltage spike generated by emergency braking, prevent the control module 50 and the driving motor 60 from being damaged by energy generated by downhill, ensure that the electric wheelchair is safe and downhill, and increase the driving range of the electric wheelchair. It is understood that the control module 50 of the present application may be a motor controller in an electric wheelchair, but incorporates the functionality of the control module 50 of the present application to achieve energy recovery.
Further, in some embodiments of the present invention, the control module 50, when controlling the first voltage conversion module 30 and the second voltage conversion module 40 for energy recovery based on the charge of the power battery pack 10, is specifically configured to: when the electric quantity of the power battery pack 10 is greater than or equal to a first preset electric quantity, the first voltage conversion module 30 is controlled to convert the alternating current output by the driving motor 60 into direct current to charge the super capacitor 20, and when the electric quantity of the power battery pack 10 is smaller than the first preset electric quantity, the second voltage conversion module 40 is controlled to boost the direct current output by the super capacitor 20 and charge the power battery pack 10; when the power battery pack 10 has a power less than a first preset power, the first voltage conversion module 30 is controlled to convert the ac power output by the driving motor 60 into dc power to charge the power battery pack 10. Optionally, the first preset amount of power is 90% of the maximum amount of power allowed by the power battery pack 10.
That is to say, when energy recovery is performed, if the electric quantity of the power battery pack 10 is sufficient, the control module 50 controls the first voltage conversion module 30 to transmit the energy generated by the driving motor 60 to the super capacitor 20, and the super capacitor 20 temporarily stores the energy, so as to ensure that certain energy recovery can be performed when the electric quantity of the power battery pack 10 is sufficient, and along with the consumption of the electric quantity of the power battery pack 10, when the electric quantity of the power battery pack 10 is reduced to a certain value, the electric energy in the super capacitor 20 can be transmitted to the power battery pack 10, on one hand, it can be ensured that the power battery pack 10 has sufficient electric quantity within a long working time, the stability of the electric quantity is ensured, and on the other hand, energy recovery can be continuously performed through the super capacitor 20. During energy recovery, if the electric quantity of the power battery pack 10 is lower than a certain value, the first voltage conversion module 30 can be directly controlled to transmit the energy generated by the driving motor 60 to the power battery pack 10, so as to reduce the problems of large energy recovery loss caused by energy being transmitted to the power battery pack 10 through the super capacitor 20 and increase the working time of the second voltage conversion module 40, and enable the power battery pack 10 to timely supplement the electricity. Therefore, the energy recovery of the electric wheelchair can be realized, the driving range of the electric wheelchair is improved, more energy can be recovered, and the energy stability of the power battery pack can be prolonged.
In some embodiments of the present invention, as shown in fig. 2, the first voltage conversion module 30 includes: the power battery pack comprises a rectifying unit 31 and a first DCDC conversion unit 32, wherein the input end of the rectifying unit 31 is connected with the driving motor 60, the input end of the first DCDC conversion unit 32 is connected with the output end of the rectifying unit 31, and the output end of the first DCDC conversion unit 32 is respectively connected with the power battery pack 10 and the super capacitor 20.
Specifically, in this example, when energy recovery is performed, the control module 50 may control the rectifying unit 31 to rectify the induced alternating current generated by the driving motor 60 into direct current and output the direct current to the first DCDC conversion unit 32, and control the first DCDC conversion unit 32 to operate so as to convert the direct current into direct current according to the permission of the super capacitor 20 or the power battery pack 10, so as to charge the super capacitor 20 or the power battery pack 10, thereby achieving energy recovery of the electric wheelchair.
Further, the first voltage conversion module 30 may further include: and a first switching unit 33, the first switching unit 33 being connected between the output terminal of the rectifying unit 31 and the input terminal of the first DCDC converting unit 32.
Specifically, the control module 50 may control the first DCDC conversion unit 32 to stop operating when energy recovery is not required, but when the first DCDC conversion unit 32 is abnormal and cannot be normally stopped, the control module 50 may control the first switching unit 33 disposed between the output terminal of the rectification unit 31 and the input terminal of the first DCDC conversion unit 32 to be in a closed state, so as to ensure that the recovery circuit is reliably turned off in time when the first DCDC conversion unit 32 is abnormal. When energy recovery is required, the control module 50 controls the first switch unit 33 to be in a conducting state, and controls the first DCDC conversion unit 32 to work, so as to convert the direct current into direct current which is allowed by the super capacitor 20 or the power battery pack 10, and charge the super capacitor 20 or the power battery pack 10, thereby realizing energy recovery of the electric wheelchair.
In some embodiments of the present invention, as shown in fig. 2, the second voltage conversion module 40 includes: and the input end of the second DCDC conversion unit 41 is connected with the super capacitor 20, and the output end of the second DCDC conversion unit 41 is connected with the power battery pack 10.
Specifically, in this example, when energy of the super capacitor 20 needs to be transmitted to the power battery pack 10 during energy recovery, the control module 50 may control the second DCDC conversion unit 41 to operate to convert the dc power output by the super capacitor 20 into a dc power that meets the requirements of the power battery pack 10, and charge the power battery pack 10, so as to timely supplement the power to the power battery pack 10, ensure that the power battery pack 10 has stable electric quantity for a long time, and enable the super capacitor 10 to continue energy recovery.
Further, the second voltage conversion module 40 may further include: and a second switching unit 42, wherein the second switching unit 42 is connected between the super capacitor 20 and the input terminal of the second DCDC conversion unit 41.
Specifically, when energy recovery is performed, the control module 50 may control the second DCDC conversion unit 41 to stop operating when energy of the supercapacitor 20 is not required to be transmitted to the power battery pack 10, but when the second DCDC conversion unit 41 is abnormal and cannot be normally stopped, the control module 50 may control the second switching unit 42 disposed between the output end of the supercapacitor 20 and the input end of the second DCDC conversion unit 41 to be in a closed state, so that when the second DCDC conversion unit 41 is abnormal, reliable shutdown of a recovery circuit can be timely guaranteed. When the energy of the super capacitor 20 needs to be transmitted to the power battery pack 10, the control module 50 controls the second switch unit 42 to be in a conducting state, and controls the second DCDC conversion unit 41 to work, so as to convert the direct current output by the super capacitor 20 into the direct current which is allowed by the power battery pack 10, and charge the power battery pack 10, so that on one hand, the power battery pack 10 is timely supplemented, the power battery pack 10 is ensured to have stable electric quantity in a long time, and on the other hand, the super capacitor 10 can continue to recover the energy.
In some embodiments of the present invention, as shown in FIG. 2, the power battery pack 10 includes an energy management system 11, and the energy management system 11 is coupled to the control module 50 for obtaining power from the power battery pack 10 and sending the power battery to the control module 50.
Optionally, the energy management system 11 and the control module 50 both include a CAN communication unit, and the energy management system 11 sends the electric quantity of the power battery pack 10 to the control module 50 through the CAN communication unit.
Specifically, as shown in fig. 2, the energy management system 11 is built in the power battery pack 10 and is connected to the control module 50 through a CAN communication unit to realize CAN communication between the energy management system 11 and the control module 50, the electric quantity of the power battery pack 10 acquired by the energy management module 11 is sent to the control module 50 through a CAN communication line, and the control module 50 selects different electricity supplementing ways according to the remaining electric quantity in the power battery pack 10.
In some embodiments of the present invention, as shown in fig. 2, the energy recovery system of the electric wheelchair further includes: the temperature detection module 51 is arranged in the control module 50, the temperature detection module 51 is used for detecting the temperature of the control module 50, and the control module 50 is also used for controlling the driving motor 60 according to the temperature.
Optionally, the energy recovery system of the electric wheelchair further includes an alarm module 70, the alarm module 70 is connected to the control module 50, and the control module 50 is further configured to control the alarm module 70 to issue an alarm prompt when the temperature exceeds a preset temperature threshold.
Specifically, the temperature detection module 51 is disposed in the control module 50, and is used for detecting the temperature of the control module 50 in the working process of the energy recovery system, the alarm module 70 is directly connected to the control module 50, when the temperature detection module 51 detects that the temperature of the control module 50 exceeds a preset temperature threshold, that is, when the temperature of the control module 50 is too high, the control module 50 sends a signal to the alarm module 70 to control the alarm module 70 to perform a corresponding alarm response, such as sending an alarm sound or a vibration alert, and the like, and meanwhile, the control module 50 reduces the power of the driving motor 60, so that the internal temperature of the control module 50 is reduced until the temperature is reduced to a reasonable range. Therefore, the temperature detection module 51 and the alarm module 70 can detect and alarm the internal temperature of the control module 50, and the control module 50 reduces the power of the driving motor 60 at a higher temperature, so that on one hand, danger caused by overhigh temperature of the control module 50 is avoided, on the other hand, the power battery pack 10 can be ensured to work in a proper temperature range, and the power supply efficiency of the power battery pack 100 is improved.
In summary, according to the energy recovery system of the electric wheelchair, the control module controls the first voltage conversion module and the second voltage conversion module according to the electric quantity of the power battery pack to charge the power battery or the super capacitor, so that the energy recovery of the electric wheelchair can be realized, and the driving range of the electric wheelchair can be effectively increased.
Fig. 3 is a schematic structural view of an electric wheelchair according to an embodiment of the present invention, and referring to fig. 3, the electric wheelchair 1000 includes the energy recovery system 100.
According to the electric wheelchair disclosed by the embodiment of the invention, the driving range of the electric wheelchair can be effectively improved through the energy recovery system.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An energy recovery system for an electrically powered wheelchair, comprising: the power battery pack, the super capacitor, the first voltage conversion module, the second voltage conversion module and the control module, wherein,
the first voltage conversion module is respectively connected with the power battery pack, the super capacitor and the driving motor and is used for converting alternating current output by the driving motor into direct current to charge the power battery pack or the super capacitor;
the second voltage conversion module is respectively connected with the super capacitor and the power battery pack and used for performing voltage boosting and reducing processing on the direct current output by the super capacitor to charge the power battery pack;
the control module is respectively connected with the first voltage conversion module and the second voltage conversion module and used for controlling the first voltage conversion module and the second voltage conversion module according to the electric quantity of the power battery pack so as to recover energy.
2. The energy recovery system of an electrically powered wheelchair as claimed in claim 1, wherein the control module, when controlling the first and second voltage conversion modules for energy recovery based on the charge of the power battery pack, is specifically configured to:
when the electric quantity of the power battery pack is larger than or equal to a first preset electric quantity, the first voltage conversion module is controlled to convert alternating current output by the driving motor into direct current to charge the super capacitor, and when the electric quantity of the power battery pack is smaller than the first preset electric quantity, the second voltage conversion module is controlled to boost the direct current output by the super capacitor and charge the power battery pack;
when the electric quantity of the power battery pack is smaller than the first preset electric quantity, the first voltage conversion module is controlled to convert the alternating current output by the driving motor into direct current to charge the power battery pack.
3. The energy recovery system for an electrically powered wheelchair of claim 1, wherein the first voltage conversion module comprises:
the input end of the rectifying unit is connected with the driving motor;
the input end of the first DCDC conversion unit is connected with the output end of the rectification unit, and the output end of the first DCDC conversion unit is respectively connected with the power battery pack and the super capacitor.
4. The energy recovery system for an electrically powered wheelchair of claim 3, wherein the first voltage conversion module further comprises:
a first switching unit connected between an output terminal of the rectifying unit and an input terminal of the first DCDC converting unit.
5. The energy recovery system for an electrically powered wheelchair of claim 1, wherein the second voltage conversion module comprises:
and the input end of the second DCDC conversion unit is connected with the super capacitor, and the output end of the second DCDC conversion unit is connected with the power battery pack.
6. The energy recovery system of an electrically powered wheelchair of claim 5, wherein the second voltage conversion module further comprises:
a second switching unit connected between the super capacitor and an input terminal of the second DCDC conversion unit.
7. The energy recovery system of the electrically propelled wheelchair of claim 1 wherein the power battery pack includes an energy management system, the energy management system being coupled to the control module for capturing and transmitting the charge of the power battery pack to the control module.
8. The energy recovery system for an electrically powered wheelchair of claim 7 wherein the energy management system and the control module each include a CAN communication unit through which the energy management system transmits the charge of the power battery pack to the control module.
9. The energy recovery system for an electrically powered wheelchair as claimed in any one of claims 1 to 8, further comprising:
the temperature detection module is arranged in the control module and used for detecting the temperature of the control module, and the control module is also used for controlling the driving motor according to the temperature.
10. An electrically powered wheelchair comprising an energy recovery system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398751.3A CN115208036A (en) | 2021-04-12 | 2021-04-12 | Electric wheelchair and energy recovery system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398751.3A CN115208036A (en) | 2021-04-12 | 2021-04-12 | Electric wheelchair and energy recovery system thereof |
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| CN115208036A true CN115208036A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110398751.3A Pending CN115208036A (en) | 2021-04-12 | 2021-04-12 | Electric wheelchair and energy recovery system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117885543A (en) * | 2023-12-29 | 2024-04-16 | 东莞市博贝斯新能源科技有限公司 | Electric wheelchair energy recovery system and electric wheelchair based on lithium battery |
-
2021
- 2021-04-12 CN CN202110398751.3A patent/CN115208036A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117885543A (en) * | 2023-12-29 | 2024-04-16 | 东莞市博贝斯新能源科技有限公司 | Electric wheelchair energy recovery system and electric wheelchair based on lithium battery |
| CN117885543B (en) * | 2023-12-29 | 2024-06-07 | 东莞市博贝斯新能源科技有限公司 | Electric wheelchair energy recovery system and electric wheelchair based on lithium battery |
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