CN211032203U - Battery parallel power supply system of electric vehicle and power parallel device thereof - Google Patents
Battery parallel power supply system of electric vehicle and power parallel device thereof Download PDFInfo
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- CN211032203U CN211032203U CN201921603468.4U CN201921603468U CN211032203U CN 211032203 U CN211032203 U CN 211032203U CN 201921603468 U CN201921603468 U CN 201921603468U CN 211032203 U CN211032203 U CN 211032203U
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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
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- 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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Abstract
The utility model relates to an electric vehicle's parallelly connected power supply system of battery and electric power parallel connection ware thereof, this power supply system includes first battery module, second battery module, motor controller and electric power parallel connection ware, wherein when the electric power of this second battery module is less than a default, this electric power parallel connection ware control provides electric power to this motor controller from this first battery module, makes this motor controller utilize the electric power of this first battery module to last the power supply for electric vehicle's motor, improves electric vehicle's continuation of the journey power.
Description
Technical Field
The utility model relates to an electric vehicle's parallelly connected power supply system of battery and electric power parallel connection ware thereof especially indicates a power supply system that can promote electric vehicle continuation of the journey power.
Background
Under the trend of pursuing energy saving and carbon reduction all over the world, a lot of green energy sources are gradually paid attention by the public, and the dependence on petroleum energy sources is hopefully reduced, wherein electric transportation tools are also gradually prosperous under the trend, and governments are actively promoting the green energy industry and giving relatively high subsidy benefits, so as to attract the public to adopt emerging technologies.
Endurance of an electric vehicle is an important consideration for the user, and is directly dependent on the battery capacity. For electric vehicles using high power motor systems (e.g., greater than 4kW and above), this results in an increase in the weight of the overall battery because a greater number of batteries are required to meet the high power demand. Such a heavy battery is inconvenient for a user to replace and move, and therefore the battery is mainly fixedly disposed inside the electric vehicle and cannot be easily taken out by the user.
On the other hand, if the electric vehicle adopts the removable battery as a power source, the removable battery allows a user to replace the battery by himself and charge the battery externally, although the problems of volume, weight and inconvenient charging can be overcome, the battery of this type often cannot satisfy a high-power motor system due to insufficient capacity and poor performance of the maximum output power, resulting in insufficient cruising power of the electric vehicle.
Disclosure of Invention
For overcoming the not good problem of power supply system duration of current electric vehicle, the utility model provides a parallelly connected power supply system of battery and electric power parallel connection ware to improve electric vehicle's duration.
According to the utility model discloses an embodiment, the utility model provides an electric power parallel connection ware is applied to electric vehicle's parallelly connected power supply system of battery, and this electric power parallel connection ware includes: a control unit; the switch element is electrically connected with the control unit and is used for being connected between the first battery module and the second battery module in the battery parallel power supply system; the communication unit is electrically connected with the control unit and used for outputting the data of the control unit; when the voltage value of the second battery module is lower than a critical value, the control unit turns on the switch element, and the electric power output by the first battery module is supplied to the motor controller in the battery parallel power supply system through the electric power parallel device.
When the electric power of the second battery module reaches the critical value or below, the electric power parallel device can automatically control the switching element to be conducted, so that the first battery module provides electric power for the motor of the electric vehicle, and the cruising power of the electric vehicle can be maintained.
According to another embodiment of the present invention, the utility model provides an electric vehicle's parallelly connected power supply system of battery, this electric vehicle includes the motor, and this system includes: a first battery module including at least one first battery for supplying power required by the motor; a second battery module including at least one second battery for supplying power required by the motor, the voltage of the second battery being greater than the voltage of the first battery; a motor controller connected to the second battery module for controlling the motor of the electric vehicle; the power parallel connector is connected with the first battery module and the motor controller; when the voltage value of the second battery module is lower than a critical value, the control unit turns on the switch element, and the electric power output by the first battery module is supplied to the motor controller through the electric power parallel device.
The electric power parallel device automatically judges whether the electric power of the second battery module is lower than the preset value according to the voltage values of the first battery module and the second battery module, if so, the electric power of the first battery module can be provided for the motor controller through the electric power parallel device, and the electric power of the first battery module is used for continuously supplying power to the motor so as to improve the cruising power of the electric vehicle.
According to another embodiment of the present invention, the utility model provides an electric vehicle's parallelly connected power supply system of battery, this electric vehicle includes the motor, and this system includes: a first battery module including at least one first battery for supplying power required by the motor; a second battery module including at least one second battery for supplying power required by the motor, the voltage of the second battery being greater than the voltage of the first battery; a motor controller connected to the second battery module for controlling the motor of the electric vehicle; a vehicle controller connected to the first battery module, the second battery module, and the motor controller; and the electric power parallel connector is connected with the first battery module and the motor controller. The power parallel device comprises: a control unit; the switch element is electrically connected with the control unit and is used for being connected between the first battery module and the second battery module in the battery parallel power supply system; and the communication unit is electrically connected with the control unit and used for outputting the data of the control unit to the vehicle controller. When the voltage value of the second battery module reaches below a critical value, the vehicle controller turns on the switching element in the power parallel device, and the power output by the first battery module is supplied to the motor controller through the power parallel device.
The vehicle controller judges whether the electric power of the second battery module is lower than the preset value according to the voltage values of the first battery module and the second battery module, if so, the vehicle controller controls the electric power of the first battery module to be supplied to the motor controller through the electric power parallel connector, and the electric power of the first battery module is continuously supplied to the motor so as to improve the cruising power of the electric vehicle.
Drawings
Fig. 1 shows a block circuit diagram of a first embodiment of the parallel battery power supply system for an electric vehicle according to the present invention.
Fig. 2 shows a block diagram of the power parallel device of the present invention.
Fig. 3 is a schematic circuit diagram illustrating the operation of the first battery module of the first embodiment of the present invention supplying power to the motor through the power parallel device.
Fig. 4 shows a block diagram of a second embodiment of the parallel battery power supply system for an electric vehicle according to the present invention.
Fig. 5 shows a block diagram of a parallel battery power supply system for an electric vehicle according to the present invention, which includes a dc converter.
Detailed Description
Referring to fig. 1, the parallel battery power supply system 100 of the present invention is disposed in an electric vehicle, and is used for providing power to a motor 200 and controlling the motor 200 to operate to drive wheels of the electric vehicle. The electric vehicle power supply system 100 mainly includes a first battery module 10, a second battery module 20, a motor controller 30, and an electric power parallel connection device 40.
The first battery module 10 is composed of at least one first battery 11, and the rated voltage of the first battery 11 is a first voltage V1; in the embodiment, the first battery module 10 includes two first batteries 11 connected in parallel, each first battery 11 is a removable battery, which allows a user to take out the first battery from the electric vehicle and carry the first battery to an external charging seat or a charging station for charging, and then place the first battery back into the electric vehicle after charging.
The second battery module 20 includes at least one second battery 21 and a battery management circuit, and the rated voltage of the second battery 21 is a second voltage V2; compared to the first battery 11, the second voltage V2 of the second battery 21 is higher than the first voltage V1, for example, the second voltage V2 is 2 times (V2-2V 1) of the first voltage V1, and the energy that the second battery 21 can store is also larger than the capacity of each first battery 11, in this embodiment, the capacity of the second battery 21 is twice the capacity of each first battery 11. The second battery 21 may be a stationary battery, for example, a stationary device inside an electric vehicle; alternatively, the second battery 21 is a removable battery, but the user does not need to remove the second battery 21 from the electric vehicle to charge it on a regular basis, but is allowed to remove it and place it on an adapted external charging stand to charge it if necessary.
The motor controller (motor inverter)30 is connected to the second battery module 20 for controlling the operation of the motor 200, and the function of the motor controller 40 also includes converting the received power into a driving voltage for driving the motor 200.
The power combiner (40) is connected to the first battery module 10, the second battery module 20, and the motor controller 30. Referring to fig. 2, the power parallel device 40 includes a control unit 41, a switch element 42, and a communication unit 43. The switching element 42 is connected between the first battery module 10 and the second battery module 20, electrically connected to the control unit 41, and controlled by the control unit 41 to be switched to an ON state (ON) or an OFF state (OFF), in one embodiment, the switching element 42 is a MOS switching element. The communication unit 43 is electrically connected to the control unit 41, and in this embodiment, the communication unit 43 is a Controller Area Network (CAN) communication unit for connecting to a CAN BUS (BUS) inside the electric vehicle.
The power parallel 40 may further include a first voltage sensing element 44, a second voltage sensing element 45, a temperature sensing element 46, a current sensing element 47, and a controllable fuse 48. The first voltage sensing element 44 is connected to the control unit 41 and the first battery module 10, senses a voltage value of the first battery module 10, and the sensed voltage value is used for the control unit 41 to determine. The second voltage sensing element 45 is connected to the control unit 41 and the second battery module 20, senses a voltage value of the second battery module 20, and the sensed voltage value is used for the control unit 41 to determine. The temperature sensing element 46 is connected to the control unit 41 and senses the operating temperature of the power parallel device 40, which is determined by the control unit 41. The current sensing element 47 is connected to the control unit 41 and connected in series between the first battery module 10 and the switching element 42, measures a current value output from the first battery module 10, and the measured current value is provided to the control unit 41 for judgment. The controllable fuse 48 is connected in series with the current sensing element 47 and the switching element 42, and the control unit 41 controls whether the controllable fuse 48 is burned out.
When the power of the electric vehicle is turned on, the electric power parallel device 40 measures the voltage value of the first battery module 10 and the voltage value of the second battery module 20, the control unit 41 in the electric power parallel device 40 compares the voltage value of the second battery module 20 with a preset threshold, and when the voltage value of the second battery module 20 is greater than the threshold, the switching element 42 in the electric power parallel device 40 is maintained in an OFF state (OFF), the electric power is supplied from the second battery module 20 to the motor controller 30, and the electric power is converted into the driving voltage for driving the motor 200 by the motor controller 30.
Referring to fig. 3, when the voltage of the second battery module 20 is equal to or lower than the threshold value, the switch 22 of the second battery module 20 is turned off by the battery management circuit of the second battery module 20. The control unit 41 controls the switching element 42 to be turned to an ON state (ON), so that the power of the first battery module 10 is transmitted to the motor controller 30 through the power parallel connector 40. The motor controller 30 converts the power of the first battery module 10 into a driving voltage for driving the motor 200. For example, if the rated voltage of the second battery module 20 is 100V, the threshold value may be set to 68V, and when the power of the second battery module 20 is equal to the threshold value 68V or lower than the threshold value 68V, the first battery module 10 supplies power to the motor 200 through the power parallel 40, so that the user can continue to ride the electric vehicle to improve the endurance of the vehicle, and the vehicle does not immediately lose power of the whole vehicle, and still provides sufficient time for the user to charge the second battery module 20.
When the first battery module 10 supplies power to the motor controller 30, the power parallel 40 simultaneously activates protection mechanisms, including over-current and over-temperature protection. When the current value measured by the current sensing element 47 is greater than a preset current warning value, or the operating temperature value measured by the temperature sensing element 46 is greater than a temperature warning value, as long as any one of the conditions occurs, the control unit 41 outputs a close command to close the switching element 42, interrupts the power supply path of the first battery module 10 and stops supplying power to the motor controller 30, and sends out a fault code representing overcurrent or overtemperature to the outside, which can be transmitted to a Vehicle Controller (VCU) of the electric vehicle through the communication unit 43. The overcurrent protection can prevent the current output by the first battery module 10 from exceeding the maximum rated current thereof to cause accidents; the over-temperature protection can prevent the electric parallel device 40 from being burnt out due to abnormal temperature rise caused by excessive current or abnormal element.
When the control unit 41 activates the protection mechanism to turn the switching element 42 to the OFF state (OFF), the current sensing element 47 connected in series with the switching element 42 will theoretically not measure any more current for the reason of disconnection. However, if the switch element 42 cannot be completely turned off (e.g. a fault or a short circuit occurs), the current sensing element 47 still detects the current, and when the control unit 41 determines that the current value still exists, the control unit 41 further controls the controllable fuse 48 to burn out to protect the power system, so as to avoid the circuit or the electric vehicle from burning out due to the excessive current or the excessive temperature, and further sends out the corresponding fault code.
Referring to fig. 4, in a second embodiment of the present invention, the communication unit 43 of the power parallel 40 is connected to a Vehicle Controller (VCU)50 of the electric vehicle, the vehicle controller 50 is usually used as a vehicle control center of the electric vehicle d, and the present embodiment is different from the first embodiment in that the vehicle controller 50 can perform part or all of the functions of the control unit 41 in the power parallel 40. For example, the vehicle controller 50 determines the voltage values of the first battery module 10 and the second battery module 20 to control the switching element 42 to be turned on or off; or determining whether the current outputted from the first battery module 10 exceeds the current warning value to determine whether the switching element 42 needs to be turned off; or determining whether the operating temperature value measured by the temperature sensing element 46 is greater than the temperature alarm value to determine whether the switch element 42 needs to be turned off; or to determine whether the controllable fuse 48 needs to be controlled to burn out. The vehicle controller 50 can know the type of the problem occurring in the electric vehicle at present according to the received fault code, and controls a display panel of the electric vehicle to output corresponding prompt information for a user to refer to.
As shown in fig. 5, the present invention may further include: and a dc converter 60 connected to the second battery module 20 for converting the voltage of the second battery module 20 into a dc operating voltage, which is provided to the electronic components of the electric vehicle. For example, the DC converter 60 is a DC Buck converter (Buck DC/DC), which can convert a higher level voltage into a lower level DC operating voltage (e.g., 12V), and the DC operating voltage can be widely applied to vehicle-mounted components of the entire vehicle, such as headlights, brake lights, and dashboard.
The utility model discloses an whether the voltage that utilizes this electric power parallel connection ware 40 automatic judgement this second battery module 20 reaches below the predetermined critical value, if, then electric power parallel connection ware can switch on its inside switch element 42, makes this first battery module 10's power supply to motor controller, as the vehicle the power that continues in order to maintain electric vehicle's normal use, not only improves the continuation of the journey power of vehicle, also lets the user have abundant time to carry out the battery to the second battery module and changes or charge.
In summary, the present invention is described only in the preferred embodiments or examples of the technical means for solving the problems, and is not intended to limit the scope of the present invention. That is, all changes and modifications which are consistent with the scope of the claims of the present invention or equivalent changes and modifications according to the scope of the claims of the present invention are covered by the scope of the present invention.
Claims (12)
1. A power parallel connection device applied to a battery parallel power supply system of an electric vehicle is characterized by comprising:
a control unit;
the switch element is electrically connected with the control unit and is used for being connected between the first battery module and the second battery module in the battery parallel power supply system;
the communication unit is electrically connected with the control unit and used for outputting the data of the control unit;
when the voltage value of the second battery module is lower than a critical value, the control unit turns on the switch element, and the electric power output by the first battery module is supplied to the motor controller in the battery parallel power supply system through the electric power parallel device.
2. The electrical power parallel connection of claim 1, wherein the control unit is further connected to:
a first voltage sensing element for sensing a voltage value of the first battery module;
the second voltage sensing element is used for sensing the voltage value of the second battery module.
3. The electrical power parallel connection of claim 1, wherein the control unit is further connected to:
and the temperature sensing element senses the working temperature of the electric power parallel device, wherein when the working temperature reaches a temperature alarm value, the control unit closes the switch element.
4. The electrical power parallel connection of claim 1, wherein the control unit is further connected to:
and the current sensing element is electrically connected with the control unit and is connected in series between the first battery module and the switch element for sensing the current value output by the first battery module, wherein when the current value output by the first battery module reaches a current warning value, the control unit outputs a closing instruction to close the switch element.
5. The power combiner of claim 4, wherein the control unit is further connected to:
and the controllable fuse is connected in series with the current sensing element, wherein when the control unit outputs the switching instruction and still receives the current value sensed by the current sensing element, the control unit controls the controllable fuse to be burnt.
6. The electrical power paralleler of claim 1, wherein the communication unit is a Controller Area Network (CAN) communication unit for interfacing with a CAN BUS (BUS) inside the electric vehicle.
7. A parallel battery power supply system for an electric vehicle including a motor, characterized by comprising:
a first battery module including at least one first battery for supplying power required by the motor;
a second battery module including at least one second battery for supplying power required by the motor, the voltage of the second battery being greater than the voltage of the first battery;
a motor controller connected to the second battery module for controlling the motor of the electric vehicle;
the power parallel of any one of claims 1 to 6, connecting the first battery module and the motor controller;
when the voltage value of the second battery module is lower than a critical value, the control unit turns on the switch element, and the electric power output by the first battery module is supplied to the motor controller through the electric power parallel device.
8. A parallel battery power supply system for an electric vehicle including a motor, characterized by comprising:
a first battery module including at least one first battery for supplying power required by the motor;
a second battery module including at least one second battery for supplying power required by the motor, the voltage of the second battery being greater than the voltage of the first battery;
a motor controller connected to the second battery module for controlling the motor of the electric vehicle;
a vehicle controller connected to the first battery module, the second battery module, and the motor controller;
the electric power parallel connector is connected with the first battery module and the motor controller, and comprises:
a control unit;
the switch element is electrically connected with the control unit and is used for being connected between the first battery module and the second battery module in the battery parallel power supply system;
the communication unit is electrically connected with the control unit and used for outputting the data of the control unit to the vehicle controller; when the voltage value of the second battery module is lower than a critical value, the vehicle controller turns on the switch element in the power parallel device, and the power output by the first battery module is supplied to the motor controller through the power parallel device.
9. The parallel battery power supply system for an electric vehicle according to claim 7 or 8, wherein the first battery module includes a plurality of first batteries connected in parallel; the second battery is a stationary battery.
10. The parallel battery power supply system for an electric vehicle according to claim 7 or 8, wherein the first battery module includes a plurality of first batteries connected in parallel; the second battery is a removable battery.
11. The parallel battery power supply system for an electric vehicle according to claim 7 or 8, wherein the voltage of the second battery is twice the voltage of each of the first batteries.
12. The parallel battery power supply system for an electric vehicle according to claim 7 or 8, characterized by further comprising:
and the direct current converter is connected with the second battery module and used for converting the voltage of the second battery module into working voltage, and the working voltage is provided for vehicle-mounted components in the electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603468.4U CN211032203U (en) | 2019-09-25 | 2019-09-25 | Battery parallel power supply system of electric vehicle and power parallel device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603468.4U CN211032203U (en) | 2019-09-25 | 2019-09-25 | Battery parallel power supply system of electric vehicle and power parallel device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN211032203U true CN211032203U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921603468.4U Active CN211032203U (en) | 2019-09-25 | 2019-09-25 | Battery parallel power supply system of electric vehicle and power parallel device thereof |
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| CN (1) | CN211032203U (en) |
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2019
- 2019-09-25 CN CN201921603468.4U patent/CN211032203U/en active Active
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