CN210337646U - Electric quantity equalization processing equipment for electric automobile - Google Patents
Electric quantity equalization processing equipment for electric automobile Download PDFInfo
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- CN210337646U CN210337646U CN201920627154.1U CN201920627154U CN210337646U CN 210337646 U CN210337646 U CN 210337646U CN 201920627154 U CN201920627154 U CN 201920627154U CN 210337646 U CN210337646 U CN 210337646U
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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 embodiment of the application provides an electric quantity equalization processing equipment for an electric automobile, which belongs to the field of energy control of the electric automobile, wherein a hub motor is installed at each tire of the electric automobile, a power battery pack is installed on a chassis close to the installation position of each hub motor, a processing unit is installed on the chassis of the electric automobile, an on-off circuit which is selectively switched on and off between any two power battery packs is realized, and the processing unit controls the on-off circuit to be switched on so as to charge the high-voltage power battery pack to the low-voltage power battery pack. Through the setting of adopting a plurality of power battery packs, under the control of the processing unit, the connection between any two of the four power battery packs can be realized, the power battery pack with the highest voltage value in the current four power battery packs can be connected to the power battery pack with the lowest voltage value, the former is used for charging the latter, after the charging operation for many times, the voltages of the four battery packs are close to or equal to each other as far as possible, and the electric quantity equalization processing is completed.
Description
Technical Field
The utility model belongs to electric automobile energy control field especially relates to an electric quantity equalization processing equipment for electric automobile.
Background
Currently, in an electric vehicle, a vehicle control unit and a battery control system are designed independently, which causes a situation that information transmission delay or control is not uniform in energy scheduling, and a situation that energy control conflict may occur in a specific vehicle using environment, thereby affecting the cruising performance of the electric vehicle.
SUMMERY OF THE UTILITY MODEL
In order to solve the shortcoming and the not enough that exist among the prior art, the utility model provides an electric quantity equalization processing equipment for electric automobile can make a great deal of power battery group be in the same or similar electric quantity level as far as through a series of operations to the continuation of the journey performance with the help of guaranteeing power battery group life's mode extension electric automobile.
Specifically, the electric quantity equalization processing equipment for the electric automobile is characterized in that a hub motor is installed at each tire of the electric automobile, a power battery pack is installed on a chassis close to the installation position of each hub motor, and a processing unit which is electrically connected with each power battery pack and acquires the voltage value of each power battery pack is installed on the chassis of the electric automobile;
the chassis of the electric automobile is also provided with an on-off circuit which is controlled by the processing unit to realize the selective on-off between any two power battery packs, and the processing unit controls the on-off circuit to be conducted to realize the charging from the high-voltage power battery pack to the low-voltage power battery pack;
the on-off circuit comprises a charging circuit and a switching device, wherein the charging circuit is connected with any two power battery packs, and the switching device is arranged on the charging circuit and controlled by the processing unit.
Optionally, the switching device comprises a high voltage circuit breaker.
Optionally, the electric quantity equalization processing device further comprises a rotation speed sensor arranged on each tire;
and each power battery pack is also connected in parallel with an auxiliary battery pack electrically connected with the hub motor.
Optionally, in the running process of the electric vehicle, the power battery pack corresponding to the lowest rotating speed is determined as the target battery pack through the wheel speed transmitted by the wheel speed sensor in real time;
and the processing unit selects the power battery pack with the highest current voltage value as a sample battery pack, and controls the on-off circuit to conduct a charging circuit between the sample battery pack and the target battery pack to realize charging.
Optionally, in the running process of the electric vehicle, the power battery pack corresponding to the highest wheel speed is determined as the target battery pack through the wheel speed transmitted by the wheel speed sensor in real time;
and controlling the target battery pack to cut off power supply to the hub motor according to a preset time interval, and realizing reverse charging of the hub motor to the auxiliary battery pack.
Optionally, the electric quantity equalization processing device further includes a millimeter wave radar electrically connected to the processing unit and configured to obtain a distance between the electric vehicle and a front obstacle.
Optionally, the power equalization processing device includes:
and when the distance of the front obstacle sent by the millimeter wave radar is lower than a preset threshold value, enabling the processing unit to control the voltage value of each current power battery pack to carry out speed increase on the electric automobile according to the voltage value proportion.
Optionally, the processing unit adopts an NXP S32K148 processor.
Optionally, the wheel speed sensor is W12L.
Optionally, the millimeter wave radar is a forward 79GHz radar.
The utility model provides a beneficial effect that technical scheme brought is:
1. through the setting based on a plurality of power battery packs, under the control of the processing unit, the connection between any two power battery packs in the four power battery packs can be realized, the power battery pack with the highest voltage value in the current four power battery packs can be connected to the power battery pack with the lowest voltage value, the former is used for charging the latter, after multiple charging operations, the four battery packs can be close to or equal in voltage as far as possible, and the electric quantity equalization processing is completed.
2. The power battery pack corresponding to the tire with the lowest rotating speed is charged by selecting other power battery packs with the help of the wheel speed sensor, and loss caused by the transmission process is made up in a mode of enhancing the torque of the hub motor by increasing voltage.
3. When the distance of the front obstacle sent by the millimeter wave radar is lower than a preset threshold value, the front of the electric vehicle is sufficiently wide and safe, the processing unit is enabled to obtain the voltage value of each power battery pack, the proportion of the voltage value of each power battery pack is determined through simple calculation, and the current voltage value of each power battery pack is controlled to carry out speed acceleration on the electric vehicle according to the proportion of the voltage values. Therefore, the consistency of the residual electric quantity of the power battery pack can be kept as much as possible after the speed raising process.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a connection relationship among the on-off circuit, the power battery pack and the processing unit according to the present embodiment;
fig. 2 is a schematic diagram of the connection relationship of the auxiliary battery pack according to the present embodiment.
Detailed Description
In order to make the structure and advantages of the present invention clearer, the structure of the present invention will be further described with reference to the accompanying drawings.
Example one
Generally, a single battery pack formed by a plurality of groups of rechargeable batteries is often installed in an existing electric vehicle as an energy reserve of the electric vehicle, and if a certain rechargeable battery is damaged, the electricity storage and discharge capacity of the battery pack where the certain rechargeable battery is located and even the whole battery pack can be affected, so that the cruising performance of the electric vehicle is seriously affected.
In the electric vehicle in the embodiment, the hub motor and the power battery pack for supplying power to the hub motor are installed at each tire, the hub motor is installed in the space of the hub in consideration of the operability of the installation space, and the power battery pack is preferably installed on the chassis at a position close to the hub, so that the power output of each tire has single energy supply, and the defect of insufficient energy storage caused by the damage of a certain rechargeable battery in a single battery pack mode can be effectively overcome under the energy supply structure. In addition, it is a mature prior art to use the power battery pack to supply power to the hub motor electrically connected therewith, so as to drive the electric vehicle to travel, and the related technologies of the two are not described in detail in this embodiment.
Based on the setting of a plurality of power battery packs, a processing unit which is electrically connected with each power battery pack and acquires the voltage value of each power battery pack is arranged on a chassis of the electric automobile. The chassis of the electric automobile is also provided with an on-off circuit which is controlled by the processing unit to realize the selective on-off between any two power battery packs, and the processing unit controls the on-off circuit to be conducted to realize the charging from the high-voltage power battery pack to the low-voltage power battery pack.
The connection relationship among the on-off circuit, the power battery packs and the processing unit is shown in fig. 1, and as can be seen from fig. 1, under the control of the processing unit, the connection between any two of the four power battery packs can be realized, the power battery pack with the highest voltage value in the four current power battery packs can be connected to the power battery pack with the lowest voltage value, the former can be used for charging the latter, after a plurality of charging operations, the four battery packs can be made to have similar or equal voltages as much as possible, and the electric quantity equalization processing is completed.
A plurality of power battery organizes have similar electric quantity can make the wheel hub motor who directly links with every power battery group have similar drive power, makes vehicle overall structure load balance like this at electric automobile's the in-process of marcing, can also reduce because of the part abnormal sound or damage that vehicle overall structure load unbalance leads to under the prerequisite of guaranteeing duration.
In order to realize the charging operation of two power battery packs, the on-off circuit comprises a charging circuit for connecting any two power battery packs and a switch device which is arranged on the charging circuit and controlled by the processing unit. The control of the switching device by the processing unit can be realized by an electromagnetic relay connected between the two, and in order to adapt to the high-voltage environment of the power battery pack, the switching device preferably uses a high-voltage circuit breaker (or called high-voltage switch) which can not only cut off or close the no-load current and the load current in the high-voltage circuit, but also cut off the overload current and the short-circuit current through the action of a relay protection device when the system has a fault, and the switching device has a quite perfect arc extinguishing structure and enough current breaking capacity.
Example two
In order to further improve the effect of the electricity equalization processing operation, on the basis of the electricity equalization processing device provided in the previous embodiment, the present embodiment adds a rotation speed sensor provided on each tire in the electricity equalization processing device, and each power battery pack is further connected in parallel with an auxiliary battery pack electrically connected with the hub motor.
Since the torque output from the in-wheel motor is output to the tire through the speed reducer, if a loss occurs during transmission, the torque output to the tire cannot cause the tire to have the highest rotation speed although the current power battery pack supplying power to the in-wheel motor has a higher voltage value. In consideration of the point, other power battery packs are needed to be selected to charge the power battery pack corresponding to the tire with the lowest rotating speed, and the loss caused by the transmission process is made up in a mode of enhancing the torque of the hub motor by increasing the voltage.
The specific execution mode is as follows:
21. in the running process of the electric automobile, determining a power battery pack corresponding to the lowest rotating speed as a target battery pack through the wheel speed transmitted by a wheel speed sensor in real time;
22. and the processing unit selects the power battery pack with the highest current voltage value as a sample battery pack, and controls the on-off circuit to conduct a charging circuit between the sample battery pack and the target battery pack to realize charging.
In addition, if a tire has an excessively fast rotation speed in the form of an electric vehicle, a braking operation is required to be performed on the tire, and energy recovery is achieved by the braking operation, which is specifically performed by:
31. in the running process of the electric automobile, determining a power battery pack corresponding to the highest wheel speed as a target battery pack through the wheel speed transmitted by a wheel speed sensor in real time;
32. and controlling the target battery pack to cut off power supply to the hub motor according to a preset time interval, and realizing reverse charging of the hub motor to the auxiliary battery pack.
The auxiliary battery pack is connected as shown in fig. 2, and the energy recovery mode is used for recovering the excess energy released by the vehicle in braking or coasting, converting the excess energy into electric energy through the generator, and storing the electric energy in the auxiliary battery pack for later acceleration running. When the vehicle starts or accelerates and needs to increase the driving force, the auxiliary battery pack provides auxiliary power for the functions of the hub motor, so that electric energy is effectively applied.
EXAMPLE III
On the basis of the structure of the electric quantity equalization processing device provided by the first embodiment, the embodiment also provides a mode for performing acceleration control based on the distance between the vehicle and the front obstacle, and the specific execution mode is a millimeter wave radar which is electrically connected with the processing unit and is used for acquiring the distance between the electric vehicle and the front obstacle.
The millimeter wave radar for early warning of front collision of the automobile overcomes the defects of the detection modes of infrared, laser, camera and ultrasonic in the automobile anti-collision detection, and has stable detection performance and good environmental adaptability. The sensor can measure the target distance and parameters such as the relative speed, the azimuth angle and the like of a target object, and is a necessary sensor for unmanned automatic driving in the future. In addition, the millimeter wave radar has the advantages of simple structure, low transmitting power, high resolution and sensitivity and small size of antenna components, and becomes the first choice of the active anti-collision radar of the automobile.
When the distance of the front obstacle sent by the millimeter wave radar is lower than a preset threshold value, the front of the electric vehicle is sufficiently wide and safe, at the moment, the processing unit is enabled to obtain the voltage value of each power battery pack (the auxiliary battery pack is also included herein), the proportion of the voltage value of each power battery pack is determined through simple calculation, and the current voltage value of each power battery pack is controlled to carry out speed increase on the electric vehicle according to the proportion of the voltage value. Therefore, the consistency of the residual electric quantity of the power battery pack can be kept as much as possible after the speed raising process.
The sequence numbers in the above embodiments are merely for description, and do not represent the sequence of the assembly or the use of the components.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The electric quantity equalization processing equipment for the electric automobile is characterized in that a chassis close to the installation position of each hub motor is provided with a power battery pack, and a processing unit which is electrically connected with each power battery pack and acquires the voltage value of each power battery pack is arranged on the chassis of the electric automobile;
the chassis of the electric automobile is also provided with an on-off circuit which is controlled by the processing unit to realize the selective on-off between any two power battery packs, and the processing unit controls the on-off circuit to be conducted to realize the charging from the high-voltage power battery pack to the low-voltage power battery pack;
the on-off circuit comprises a charging circuit and a switching device, wherein the charging circuit is connected with any two power battery packs, and the switching device is arranged on the charging circuit and controlled by the processing unit.
2. The electricity quantity equalization processing device for electric vehicle according to claim 1, characterized in that said switching means comprises a high voltage circuit breaker.
3. The electricity amount equalization processing device for electric vehicle according to claim 1,
the electric quantity equalization processing equipment further comprises a rotating speed sensor arranged on each tire;
and each power battery pack is also connected in parallel with an auxiliary battery pack electrically connected with the hub motor.
4. The electricity amount equalization processing device for electric vehicle according to claim 3,
in the running process of the electric automobile, determining a power battery pack corresponding to the lowest rotating speed as a target battery pack through the wheel speed transmitted by a wheel speed sensor in real time;
and the processing unit selects the power battery pack with the highest current voltage value as a sample battery pack, and controls the on-off circuit to conduct a charging circuit between the sample battery pack and the target battery pack to realize charging.
5. The electricity amount equalization processing device for electric vehicle according to claim 3,
in the running process of the electric automobile, determining a power battery pack corresponding to the highest wheel speed as a target battery pack through the wheel speed transmitted by a wheel speed sensor in real time;
and controlling the target battery pack to cut off power supply to the hub motor according to a preset time interval, and realizing reverse charging of the hub motor to the auxiliary battery pack.
6. The electric quantity equalization processing device for the electric automobile according to claim 1, characterized by further comprising a millimeter wave radar electrically connected with the processing unit and used for acquiring the distance between the electric automobile and a front obstacle.
7. The electric quantity equalization processing device for electric vehicle according to claim 6, characterized by comprising:
and when the distance of the front obstacle sent by the millimeter wave radar is lower than a preset threshold value, enabling the processing unit to control the voltage value of each current power battery pack to carry out speed increase on the electric automobile according to the voltage value proportion.
8. The electric quantity equalization processing device for electric automobile according to any one of claims 1 to 7, characterized in that said processing unit employs an NXP S32K148 processor.
9. The electricity amount equalization processing device for an electric vehicle according to claim 4 or 5, characterized in that the wheel speed sensor is W12L.
10. The electric quantity equalization processing device for electric vehicles according to any one of claims 6 to 7, characterized in that the millimeter wave radar employs a forward 79GHz radar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920627154.1U CN210337646U (en) | 2019-05-05 | 2019-05-05 | Electric quantity equalization processing equipment for electric automobile |
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| CN201920627154.1U CN210337646U (en) | 2019-05-05 | 2019-05-05 | Electric quantity equalization processing equipment for electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469713A (en) * | 2020-04-28 | 2020-07-31 | 东风汽车集团有限公司 | Passive equalization control method for new energy automobile power battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469713A (en) * | 2020-04-28 | 2020-07-31 | 东风汽车集团有限公司 | Passive equalization control method for new energy automobile power battery |
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Effective date of registration: 20220706 Address after: 321017 Zhejiang province Jinhua Wuzhou Street No. 1188 Jinhua Polytechnic Patentee after: Zhang Mingyao Address before: 321017 Zhejiang province Jinhua Wuzhou Street No. 1188 Jinhua Polytechnic Patentee before: JINHUA College OF PROFESSION AND TECHNOLOGY |