阅读说明：本技术 一种分压式电池组供电系统 (Voltage-dividing type battery pack power supply system ) 是由 武春风 王付元 李阳 曾赣生 向涛 王红杰 于 2019-09-16 设计创作，主要内容包括：本发明涉及能源系统技术领域,公开了一种分压式电池组供电系统。包括：N个第一动力电池组成第一串联电路,第一串联电路的一端连接第一高压箱,通过第一高压箱给第一高压箱对应的N个驱动控制器供电；N个第二动力电池组成第二串联电路,第二串联电路的一端连接第二高压箱,通过第二高压箱给第二高压箱对应的N个驱动控制器供电；第一串联电路和第二串联电路的另一端分别与备用动力电池连接；N个第一动力电池、N个第二动力电池和备用动力电池通过电池管理系统与CAN总线介入,所述驱动控制器与CAN总线介入。上述方案的供电设置方式,提高了能源汽车中供电系统可靠性,维修方便灵活,空间利用率大；分压后的电池组极大的减小了电池管理系统的压力。(The invention relates to the technical field of energy systems and discloses a voltage-dividing type battery pack power supply system. The method comprises the following steps: the N first power batteries form a first series circuit, one end of the first series circuit is connected with the first high-voltage box, and power is supplied to the N driving controllers corresponding to the first high-voltage box through the first high-voltage box; the N second power batteries form a second series circuit, one end of the second series circuit is connected with a second high-voltage box, and the second high-voltage box supplies power to the N driving controllers corresponding to the second high-voltage box; the other ends of the first series circuit and the second series circuit are respectively connected with a standby power battery; n first power battery, N second power battery and reserve power battery pass through battery management system and CAN bus and intervene, drive controller and CAN bus intervene. The power supply arrangement mode of the scheme improves the reliability of a power supply system in the energy automobile, and has convenient and flexible maintenance and large space utilization rate; the divided battery pack greatly reduces the pressure of the battery management system.)

1. A voltage-dividing battery pack power supply system comprises a vehicle controller and a battery management system connected with the vehicle controller through a CAN bus, and is characterized by further comprising N first power batteries, N second power batteries, a first high-voltage box, a second high-voltage box and a standby power battery, wherein N is a natural number greater than 1; the N first power batteries form a first series circuit, one end of the first series circuit is connected with the first high-voltage box, and the first high-voltage box supplies power to the N driving controllers corresponding to the first high-voltage box; the N second power batteries form a second series circuit, one end of the second series circuit is connected with a second high-voltage box, and the second high-voltage box supplies power to N driving controllers corresponding to the second high-voltage box; the other ends of the first series circuit and the second series circuit are respectively connected with a standby power battery; n first power battery, N second power battery and reserve power battery pass through battery management system and intervene with the CAN bus, drive controller and CAN bus intervene.

2. The system of claim 1, further comprising a supplementary power unit, wherein an engine is used as a supplementary power source, the generator is connected to the CAN bus, and the electric energy generated by the engine is rectified and then supplied to the driving controller via the supplementary power unit.

3. The system of claim 1, wherein when one of the first or second power cells in the battery pack is damaged, the damaged power cell is shorted, and the backup power cell is connected to the series circuit where the damaged power cell is located.

4. The voltage division battery power supply system of claim 1 wherein N is 3, 4 or 5.

5. The system according to claim 1, wherein the first high voltage box and the second high voltage box are respectively provided with a spare power supply interface for supplying power to the electrical devices of the whole vehicle except for the chassis power.

6. The system of claim 1, wherein the vehicle control unit is further connected to an operation panel.

Technical Field

The invention relates to the technical field of energy systems, in particular to a voltage division type battery pack power supply system.

Background

With the development of new energy automobiles, the power supply of the new energy automobiles becomes one of the main factors restricting the development of the new energy automobiles. The new energy automobile power supply mainly has the advantages of low storable electric energy, short endurance time, high battery replacement cost, low battery reliability and the like. In addition, many special vehicles are also increasingly powered by electrical energy. However, special vehicles have higher requirements on the reliability of the power supply system by the power system, and the design of the power supply system needs to be tested.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problem of low reliability of the power supply system in the energy automobile, the voltage-dividing type battery pack power supply system is provided.

The technical scheme adopted by the invention is as follows: a voltage-dividing type battery pack power supply system comprises a vehicle control unit, a battery management system connected with the vehicle control unit through a CAN bus, N first power batteries, N second power batteries, a first high-voltage box, a second high-voltage box and a standby power battery, wherein N is a natural number greater than 1; the N first power batteries form a first series circuit, one end of the first series circuit is connected with the first high-voltage box, and the first high-voltage box supplies power to the N driving controllers corresponding to the first high-voltage box; the N second power batteries form a second series circuit, one end of the second series circuit is connected with a second high-voltage box, and the second high-voltage box supplies power to N driving controllers corresponding to the second high-voltage box; the other ends of the first series circuit and the second series circuit are respectively connected with a standby power battery; n first power battery, N second power battery and reserve power battery pass through battery management system and intervene with the CAN bus, drive controller and CAN bus intervene.

Furthermore, the voltage division type battery pack power supply system further comprises a supplementary power supply unit, an engine is used as a supplementary power supply, the generator is involved with the CAN bus, and electric energy prepared by the engine is rectified and then supplies power to the driving controller through the supplementary power supply unit.

Furthermore, when a certain first power battery or a certain second power battery in the voltage division type battery pack is damaged, the damaged power battery is in short circuit, and the standby power battery is connected into a series circuit where the damaged power battery is located.

Further, N is 3, 4 or 5.

Furthermore, a standby power supply interface is reserved on the first high-voltage box and the second high-voltage box respectively, and the standby power supply interface supplies power for electric equipment of the whole vehicle except chassis power.

Furthermore, the vehicle control unit is also connected with an operation panel.

Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: according to the technical scheme, the voltage-dividing type power battery packs are connected in series, and the high-voltage box supplies power to the driving motor, so that the electric energy acquired by the driving motor is more stable; the technical scheme of the invention can be applied to energy automobiles and other systems for improving the control accuracy and the space utilization rate through partial pressure.

In the technical scheme of the invention, if a certain group of batteries in the voltage-dividing type battery pack is damaged, short circuit treatment can be carried out at the position, and the standby power battery is connected into a series circuit where the damaged power battery is located to continue to supply power; therefore, even if one battery pack is damaged, the power supply condition of a driving motor of the automobile is not influenced by the standby power battery pack, and the power supply reliability of the energy automobile is improved.

In the technical scheme of the invention, the generator is used as a supplementary (standby) power source and can be used for accelerating or providing power for the whole vehicle when the power of a battery system is insufficient.

The technical scheme of the invention has the advantages of convenient and flexible maintenance and replacement and large space utilization rate.

According to the technical scheme, the number of the series single power batteries contained in the battery pack module after voltage division is greatly reduced, and the pressure of a battery management system is greatly reduced.

Drawings

Fig. 1 is a schematic diagram of a voltage-dividing battery pack power supply system according to an embodiment of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, a voltage-dividing battery pack power supply system includes a vehicle controller and a battery management system connected to the vehicle controller through a CAN bus, the invention also particularly relates to N first power batteries and N second power batteries, where N is 3 in this embodiment, a high-voltage box a and a high-voltage box B; the 3 first power batteries are respectively a power battery 1, a power battery 2 and a power battery 3 which are connected in series to form a first series circuit, one end of the first series circuit is connected with the high-voltage box A, and the N driving controllers corresponding to the high-voltage box A are supplied with power through the high-voltage box A; the 3 second power batteries are respectively a power battery 4, a power battery 5 and a power battery 6 which are connected in series to form a second series circuit, one end of the second series circuit is connected with the high-voltage box B, and the N driving controllers corresponding to the high-voltage box B are supplied with power through the high-voltage box B; the other ends of the first series circuit and the second series circuit are respectively connected with a standby power battery; the power battery 1, the power battery 2, the power battery 3, the power battery 4, the power battery 5, the power battery 6 and the standby power battery are involved with the CAN bus through a battery management system, and the driving controller is involved with the CAN bus.

The distribution positions of the high-pressure tank A and the high-pressure tank B are not the key points of the application, and the specific position distribution can be determined according to the design requirements of the automobile in the prior art. The size of the high-pressure tank is also variable, and the position of the high-pressure tank can be changed conveniently by considering the reserved space of the vehicle chassis. The drive controller corresponding to the high-voltage box A is a drive controller unit for supplying power to the high-voltage box A; and the drive controller unit is used for controlling the drive controller unit to supply power to the high-voltage box B corresponding to the high-voltage box B. In principle, the wiring between the driving units for supplying power to the high-voltage box A/high-voltage box B side is the most convenient design basis for determining whether the driving controller is supplied with power by the high-voltage box A or the high-voltage box B. It is possible that the high voltage tank, which is closer to the drive controller, powers the drive controller.

Preferably, the voltage-dividing type battery pack power supply system further comprises a supplement/standby power supply unit, the engine is used as a supplement/standby power supply, the generator is involved with the CAN bus, and the electric energy prepared by the engine is rectified and then supplied to the drive controller through the supplement power supply unit, so that the power supply system CAN be used for accelerating or providing power for the whole vehicle when the electric power of the battery system is insufficient.

Preferably, the high-voltage box A and the high-voltage box B are respectively provided with a standby power supply interface for supplying power to the electric equipment of the whole vehicle except the chassis power.

The invention provides a triple power guarantee: (1) the voltage-dividing battery packs are connected in series and supply power to the driving motor through the high-voltage box, so that the power supply stability of the driving motor is improved; (2) when a certain first power battery or a certain second power battery in the voltage-dividing type battery pack is damaged, the short-circuit processing is carried out, and the standby power battery is connected into a series circuit where the damaged power battery is located to continue supplying power. Thus, even if one power battery is broken, such as the power battery 6, and the spare power battery, the power battery 5 and the power battery 4 form a series circuit, power is continuously supplied to the driving controller through the high-voltage box B. (3) The generator is used as a supplementary (standby) power source and supplies supplementary (standby) power when needed.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.