阅读说明：本技术 一种基于退役电池和超级电容的电动拖拉机动力平台架构 (Electric tractor power platform framework based on retired battery and super capacitor ) 是由 王峰 赵延鹏 杨永发 于 2020-06-02 设计创作，主要内容包括：本发明公开一种基于退役电池和超级电容的电动拖拉机动力平台架构,其动力平台架构由退役电池组、主控制器、DC/DC转换器、超级电容、电机控制器组成。退役电池组通过DC/DC转换器连接到直流总线,超级电容通过DC/DC转换器连接到直流总线,直流总线连接电机控制器对电极进行驱动,DC/DC转换器、电机控制器由主控制器进行控制。本发明用于电动拖拉机的电驱动系统,可实现退役电池在电动拖拉机上的应用。(The invention discloses an electric tractor power platform architecture based on a retired battery and a super capacitor. The retired battery pack is connected to a direct current bus through a DC/DC converter, the super capacitor is connected to the direct current bus through the DC/DC converter, the direct current bus is connected with a motor controller to drive electrodes, and the DC/DC converter and the motor controller are controlled by a main controller. The invention is used for the electric drive system of the electric tractor, and can realize the application of the retired battery on the electric tractor.)

1. The utility model provides an electric tractor power platform framework based on retired battery and super capacitor which characterized in that: the system comprises a first retired battery pack (11), a first DC/DC converter (12), a second retired battery pack (9), a second DC/DC converter (10), a third retired battery pack (7), a third DC/DC converter (8), a super capacitor (1), a fourth DC/DC converter (2), a motor controller (5) and a main controller (6);

the first retired battery pack (11), the second retired battery pack (9) and the third retired battery pack (7) are respectively and electrically connected with the first DC/DC converter (12), the second DC/DC converter (10) and the third DC/DC converter (8), then are connected to the direct current bus (3) and are connected to the motor controller (5) through the direct current bus (3);

the super capacitor is connected with the fourth DC/DC converter (2), then is connected to the direct current bus (3), and is connected to the motor controller (5) through the direct current bus (3);

the first DC/DC converter (12), the second DC/DC converter (10), the third DC/DC converter (8), the fourth DC/DC converter (2) and the motor controller (5) are connected to the main controller (6) through a CAN bus (4).

2. The electric tractor power platform architecture based on the retired battery and the super capacitor according to claim 1, characterized in that: the retired battery pack is used as a main energy source of the electric tractor, the super capacitor is used as an auxiliary energy source of the electric tractor, and secondary utilization of the retired battery can be achieved.

3. The electric tractor power platform architecture based on the retired battery and the super capacitor according to claim 1, characterized in that: the first retired battery pack (11), the second retired battery pack (9) and the third retired battery pack (7) are respectively composed of a plurality of retired battery monomers with similar performance parameters obtained after testing and sorting, and according to the sorting condition of the performance parameters of the retired battery packs, 1 retired battery pack can be adopted, and 2 retired batteries or even a plurality of retired battery packs can be adopted.

4. The electric tractor power platform architecture based on the retired battery and the super capacitor according to claim 1, characterized in that: the ex-service battery pack can be composed of different types of ex-service battery monomers such as iron phosphate lithium ion batteries, ternary lithium ion batteries, nickel-metal hydride batteries and the like.

Technical Field

The invention relates to a power supply system using an electric automobile retired battery, in particular to a power platform framework of an electric tractor based on a retired battery and a super capacitor.

Background

With the development and production of electric vehicles, the problems of bringing convenience for cleaning and bringing out of service batteries of electric vehicles are brought. The problem of the retired electric vehicle battery is particularly shown in that the retired battery cannot be reused on the electric vehicle, and the direct destruction can cause environmental pollution and waste of lithium battery resources. The tractor driven by the traditional diesel engine is used in the agricultural production process of the greenhouse, and the problems are represented by environmental pollution in the greenhouse, high noise, potential safety hazards in the use of the tractor in the greenhouse and the like. The electric tractor serving as a machine which uses clean energy and has small potential safety hazard can be well applied to the production process of the agricultural greenhouse. If the batteries of the electric automobile are directly used as the main energy source, the cost of the agricultural machinery is too high. To address these issues, a need exists for an electric tractor power platform architecture based on retired batteries and super capacitors.

Disclosure of Invention

The invention mainly aims to provide a power platform framework of an electric tractor based on a retired battery and a super capacitor, which can better realize the work of a recovered electric automobile battery on the electric tractor, recycle the retired battery and meet the agricultural production requirement.

The invention relates to an electric tractor power platform architecture based on retired batteries and a super capacitor. The super capacitor is used as an auxiliary energy source and is connected with the direct current bus through the DC/DC converter, and power compensation during charging and discharging work of the retired battery pack is achieved. The retired battery and the super capacitor are subjected to voltage regulation through the DC/DC converter, and the main controller completes control over the whole platform through the CAN bus.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a power platform architecture of an electric tractor based on a retired battery and a super capacitor comprises a first retired battery pack, a first DC/DC converter, a second retired battery pack, a second DC/DC converter, a third retired battery pack, a third DC/DC converter, the super capacitor, a fourth DC/DC converter, a motor controller and a main controller;

the first retired battery pack, the second retired battery pack and the third retired battery pack are respectively connected with the first DC/DC converter, the second DC/DC converter and the third DC/DC converter, then are connected to the direct current bus and are connected to the motor controller through the direct current bus.

And the super capacitor is connected with the fourth DC/DC converter, then is connected to the direct current bus, and is connected to the motor controller through the direct current bus. The first DC/DC converter, the second DC/DC converter, the third DC/DC converter, the fourth DC/DC converter and the motor controller are connected to the main controller through a CAN bus.

The electric tractor power platform architecture based on the retired battery and the super capacitor has the following characteristics:

(1) and (5) secondary utilization of the electric automobile retired battery. The electric tractor is powered by the electric automobile retired battery serving as a main energy source, so that waste caused by destroying the retired electric automobile battery is reduced, and the problem of recycling of lithium battery resources is solved.

(2) And the environmental pollution is reduced. The retired lithium ion battery is recycled, so that the problem of environmental pollution caused by destruction of the lithium ion battery can be effectively reduced.

(3) The cost is low. The drive battery in the electric tractor adopts a retired battery, so that the problem that the cost of agricultural machinery is too high due to the fact that a new battery is directly adopted is solved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

For a better understanding of the present invention, the present invention will be further described with reference to the accompanying drawings and examples, but the embodiments of the present invention are not limited thereto.

Example 1

As shown in fig. 1, an electric tractor power platform architecture based on a retired battery and a super capacitor includes a first retired battery pack 11, a first DC/DC converter 12, a second retired battery pack 9, a second DC/DC converter 10, a third retired battery pack 7, a third DC/DC converter 8, a super capacitor 1, a fourth DC/DC converter 2, a motor controller 5, and a main controller 6.

The first retired battery pack 11, the second retired battery pack 9 and the third retired battery pack 7 are composed of lithium batteries with similar performance parameters in retired electric vehicle batteries subjected to power tests. The first decommissioned battery pack 11, the second decommissioned battery pack 9 and the third decommissioned battery pack 7 are respectively connected with the first DC/DC converter 12, the second DC/DC converter 10 and the third DC/DC converter 8, then are electrically connected to the direct current bus 3, and are connected to the motor controller 5 through the direct current bus 3 to realize the driving of the motor.

After being connected with the fourth DC/DC converter 2, the super capacitor 1 is connected to the direct current bus 3 and is connected to the motor controller 5 through the direct current bus 3, so that power compensation of the first retired battery pack 11, the second retired battery pack 9 and the third retired battery pack 7 in the charging and discharging process is achieved. The first DC/DC converter 12, the second DC/DC converter 10, the third DC/DC converter 8, the fourth DC/DC converter 2 and the motor controller 5 are connected to the main controller 6 through the CAN bus 4 to realize the control of the electric tractor platform.

The working modes of the invention are as follows:

as shown in fig. 1, an electric tractor power platform architecture based on a retired battery and a super capacitor includes a first retired battery pack 11, a second retired battery pack 9, and a third retired battery pack 7, which are respectively electrically connected to a first DC/DC converter 12, a second DC/DC converter 10, and a third DC/DC converter 8, and then connected to a DC bus 3, and connected to a motor controller 5 through the DC bus 3 to realize driving of a motor.

After being connected with the fourth DC/DC converter 2, the super capacitor 1 is connected to the direct current bus 3 and is connected to the motor controller 5 through the direct current bus 3, so that power compensation of the first retired battery pack 11, the second retired battery pack 9 and the third retired battery pack 7 in the charging and discharging process is achieved. The first DC/DC converter 12, the second DC/DC converter 10, the third DC/DC converter 8, the fourth DC/DC converter 2 and the motor controller 5 are connected to the main controller 6 through the CAN bus 4 to realize the control of the electric tractor platform.

Example 2

The super capacitor of fig. 1 may also be connected according to the method of fig. 2, as shown in fig. 2. The first retired battery pack 30, the second retired battery pack 28, and the third retired battery pack 26 are respectively connected to the first DC/DC converter 31, the second DC/DC converter 29, and the third DC/DC converter 27, and then connected to the DC bus 22, and connected to the motor controller 23 through the DC bus 22 to realize driving of the motor. The super capacitor 21 is connected in parallel to the dc bus 22 to realize power compensation of the first retired battery pack 30, the second retired battery pack 28, and the third retired battery pack 26 during charging and discharging.

CAN interfaces on the first DC/DC converter 31, the second DC/DC converter 29 and the third DC/DC converter 27 are connected with a CAN bus 25, and the CAN bus 25 is connected with the main controller 24, so that the control of the charging and discharging processes of the retired battery pack is realized.

Compared with the embodiment 1, the super capacitor in the embodiment 2 is directly connected in parallel to the direct current bus, the charging and discharging power of the retired battery pack can be directly increased through the scheme, and if the charging and discharging power of the battery is required to be continuously increased, the number of the super capacitors is increased.

The specific working principle is basically the same as that of embodiment 1, and is not described herein.