阅读说明：本技术 一种车辆启动电源soc管理系统 (Vehicle starting power supply SOC management system ) 是由 黄斌斌 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种车辆启动电源SOC管理系统,包括启动电源、DCDC计算控制单元、低压用电附件；启动电源采用锂电池作为启动电源进行低压供电；DCDC计算控制单元与启动电源在车辆功率大的情况下会相互输出电源并且同时向低压用电附件输出功率,车辆功率小或车辆充电状态下DCDC给所述启动电源充电；低压用电附件负责消耗启动电源和DCDC输出的电源。本发明通过采用锂电池作为启动电源,替代蓄电瓶进行低压供电,同时可以输出功率,补偿DCDC部分功率,同时减小DCDC的功率,从而解决车辆长时间停放,启动电源亏电问题。(The invention discloses a vehicle starting power supply SOC management system, which comprises a starting power supply, a DCDC calculation control unit and a low-voltage power accessory, wherein the DCDC calculation control unit is used for calculating the power supply of a vehicle; the starting power supply adopts a lithium battery as the starting power supply to carry out low-voltage power supply; the DCDC calculation control unit and the starting power supply can mutually output power supplies and simultaneously output power to the low-voltage electric accessories under the condition that the vehicle power is large, and the DCDC charges the starting power supply under the condition that the vehicle power is small or the vehicle is in a charging state; the low voltage power accessory is responsible for consuming power for the startup power supply and the DCDC output. According to the invention, the lithium battery is used as a starting power supply to replace a storage battery for low-voltage power supply, and meanwhile, the power can be output, partial power of the DCDC is compensated, and the power of the DCDC is reduced, so that the problems of long-time parking of a vehicle and power shortage of the starting power supply are solved.)

1. A vehicle starting power supply SOC management system is characterized by comprising a starting power supply, a DCDC calculation control unit and a low-voltage power accessory, wherein,

the starting power supply adopts a lithium battery as a starting power supply to carry out low-voltage power supply;

the DCDC calculation control unit and the starting power supply can mutually output power supplies under the condition of large vehicle power and output power to low-voltage electric accessories at the same time, and the DCDC is used for charging the starting power supply under the condition of small vehicle power or vehicle charging state;

the low voltage power accessory is responsible for consuming power for the startup power supply and the DCDC output.

2. The vehicle starting power supply SOC management system of claim 1, wherein the starting power supply detects, calculates and monitors the SOC of the lithium battery in real time.

3. The vehicle starting power supply SOC management system of claim 2, wherein in a vehicle driving state, the starting power supply calculates the SOC of the lithium battery in real time and controls the starting power supply to output power in coordination with DCDC requirements; and under the parking state of the vehicle, the power supply is started to periodically calculate the SOC of the lithium battery, and when the SOC is lower than a calibrated value, power is supplemented.

4. The vehicle starting power supply SOC management system of claim 3, wherein when the SOC of the lithium battery is lower than a calibrated value, the power supply is compensated to 100% by turning on a DCDC calculation control unit.

5. The SOC management system for vehicle starting power supply according to claim 3, wherein in the parking state, the DCDC calculation control unit of the vehicle only outputs the power compensation to the starting power supply, and the starting power supply is in the power storage state and does not output the power supply.

Technical Field

The invention relates to the technical field of vehicle power supplies, in particular to a vehicle starting power supply SOC management system.

Background

At present, along with the popularization of electric automobiles, more and more energy storage modes enter vehicles, partial mechanical and hydraulic structures on the vehicles are replaced by electronic structures, structures needing low-voltage power supply on the vehicles are more and more, and the vehicles on the market adopt storage batteries as starting power supplies to carry out low-voltage power supply, wherein the electric energy of the storage batteries is supplemented by DCDC; the storage battery is only used for low-voltage power supply, when the vehicle is parked, the storage battery cannot be used for power supplement, and the feeding condition can occur under the condition of overlong parking time of the vehicle, so that the service life of the starting power supply is influenced.

Disclosure of Invention

In view of the above technical problems in the related art, the present invention provides a system for managing a vehicle starting power supply SOC, which can overcome the above disadvantages of the prior art methods.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

a vehicle starting power supply SOC management system comprises a starting power supply, a DCDC calculation control unit and a low-voltage power utilization accessory, wherein,

the starting power supply adopts a lithium battery as a starting power supply to carry out low-voltage power supply;

the DCDC calculation control unit and the starting power supply can mutually output power supplies under the condition of large vehicle power and output power to low-voltage electric accessories at the same time, and the DCDC is used for charging the starting power supply under the condition of small vehicle power or vehicle charging state;

the low voltage power accessory is responsible for consuming power for the startup power supply and the DCDC output.

And further, starting the power supply to detect, calculate and monitor the SOC of the lithium battery in real time.

Further, under the running state of the vehicle, the starting power supply calculates the SOC of the lithium battery in real time and controls the starting power supply to output power in cooperation with the DCDC requirement; and under the parking state of the vehicle, the power supply is started to periodically calculate the SOC of the lithium battery, and when the SOC is lower than a calibrated value, power is supplemented.

Further, when the SOC of the lithium battery is lower than a calibrated value, the DCDC calculation control unit is turned on to supplement the power to 100%.

Further, in the parking state, the DCDC calculation control unit of the vehicle only outputs the power compensation to the starting power supply, and the starting power supply is in the power storage state and does not output the power supply.

The invention has the beneficial effects that: through adopting the lithium cell as starting power supply, replace the accumulator jar and carry out the low pressure power supply, can output power simultaneously, compensate DCDC partial power, reduce DCDC's power simultaneously to solve the long-time parking of vehicle, starting power insufficient voltage problem.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 block diagram of a vehicle power-up management system of a vehicle power supply system SOC according to an embodiment of the invention.

Fig. 2 is a schematic diagram of a module structure of a vehicle startup power supply SOC management system according to an embodiment of the invention when the vehicle power is low.

Fig. 3 is a schematic structural diagram of a module of a vehicle starting power supply SOC management system in a vehicle parking state according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention, and for the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below by specific use modes.

The vehicle starting power supply SOC management system comprises a starting power supply, a DCDC calculation control unit and low-voltage power accessories.

The starting power supply adopts a lithium battery as a starting power supply to carry out low-voltage power supply; when the SOC of the lithium battery is lower than 30% of the calibrated SOC, the DCDC calculation control unit is turned on to supplement the power to 100%, and the starting power supply is prevented from being damaged due to power shortage; and starting the power supply to detect, calculate and monitor the SOC of the lithium battery in real time.

As shown in fig. 1-2, the DCDC calculation control unit and the starting power supply mutually output power and simultaneously output power to the low-voltage electric accessories when the vehicle power is large, and the DCDC charges the starting power supply when the vehicle power is small or the vehicle is in a charging state.

Under the running state of the vehicle, the starting power supply calculates the SOC of the lithium battery in real time and controls the starting power supply to output power in cooperation with the DCDC requirement; as shown in fig. 3, in the parking state of the vehicle, the starting power supply periodically calculates the SOC of the lithium battery, and when the SOC is lower than a calibrated value, the power supply is compensated.

The low voltage power accessory is responsible for consuming power for the startup power supply and the DCDC output.

In summary, according to the technical scheme of the invention, the lithium battery is used as the starting power supply to replace the storage battery for low-voltage power supply, and meanwhile, the power can be output to compensate partial power of the DCDC, and the power of the DCDC is reduced, so that the problems of long-time parking of the vehicle and insufficient power of the starting power supply are solved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.