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Active equalization system for power battery pack and control method

A power battery pack, active balancing technology, applied in battery/fuel cell control devices, charge balancing circuits, control devices, etc., can solve the problem of inability to meet large-scale applications, reliability, equipment accuracy, intelligence, and low balancing efficiency. problems, to achieve the effect of improving the balance efficiency and increasing the service life

Inactive Publication Date: 2018-07-13
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic battery balance management system is still in a backward state. It has shortcomings such as reliability, equipment accuracy, intelligence and balance efficiency, and cannot meet the needs of large-scale applications.

Method used

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  • Active equalization system for power battery pack and control method
  • Active equalization system for power battery pack and control method
  • Active equalization system for power battery pack and control method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0058] Such as figure 1As shown, this embodiment discloses an active equalization system for a power battery pack, including: a power battery pack 10, a monitoring and acquisition module 20, a main control module 30, an equalization control module 40, and an equalization circuit module 50; one end of the monitoring and acquisition module 20 It is connected to each single battery in the power battery pack 10, and the other end is connected to the main control module 30. The main control module 30 is connected to the balance control module 40 through the SPI bus for two-way communication. Connect with power battery pack 10. The equalization circuit module 50 includes a plurality of equalization circuit units, and the plurality of equalization circuit units are respectively connected to each single battery in the power battery pack 10 in a one-to-one correspondence.

[0059] Wherein, the monitoring and collecting module 20 is used for monitoring and collecting the voltage, curre...

Embodiment 2

[0082] As a further preferred solution, in this embodiment, a KL series multifunctional battery simulator is used to replace the power battery pack 10 of the above-mentioned embodiment. The battery simulator uses an embedded microprocessor to control the output of a single battery with high precision. The output voltage of each single battery can be dynamically controlled by the host computer program, or it can be controlled in real time by the high-precision simulated battery model on the RT-LAB real-time simulator connected to it, so as to realize the output dynamics of the whole battery pack simulation.

[0083] As a further preferred solution, such as figure 1 As shown, a charging / discharging device 80 connected to the battery simulator is also provided in this embodiment. The charging / discharging device 80 is built by the dSPACE test cabinet and the ControDesk comprehensive experimental environment. It communicates with the battery simulator through the CAN module in the...

Embodiment 3

[0088] Such as image 3 As shown, this embodiment provides a control method for the active balancing system of the power battery pack in the first embodiment above, including the following steps S101 to S103:

[0089] S101. The main control module obtains the voltage and temperature information of each single battery in the power battery through the monitoring and acquisition module;

[0090] S102. The main control module sends a control signal to the balance control module according to the voltage, current, and temperature information of each single battery, and the control signal carries the voltage and temperature information of each single battery;

[0091] S103. The equalization control module generates a corresponding PWM signal according to the received control signal to control the equalization circuit module to complete the equalization process on the power battery pack.

[0092] It should be noted that when the main control module 30 judges that the temperature of t...

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Abstract

The invention discloses an active equalization system for a power battery pack and a control method, and belongs to the technical field of battery management. The active equalization system comprisesa power battery pack, a monitoring and collecting module, a master control module, an equalization control module and an equalization circuit module; one end of monitoring and collecting module is connected with all battery cells in the power battery pack, the other end of the monitoring and collecting module is connected with the master control module, the master control module is connected withthe equalization control module to perform two-way communication, and the driving end of the equalization control module is connected with the power battery pack through the equalization circuit module. According to the active equalization system, based on an equalization circuit of a flyback transformer, energy is transferred between the batteries and not dissipated in a resistance mode, and therefore the equalization efficiency is improved. In addition, a battery simulator is adopted for replacing the real power battery pack, the method for control over the simulator is integrated to verifyequalization experiments of the equalization system under charging, discharging and standing, and the high efficiency of the system is verified.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to an active balancing system and control method for a power battery pack. Background technique [0002] As a key technology for the development of the new energy electric vehicle industry, power battery technology has always been a hot research topic at home and abroad. The power battery part of an electric vehicle is composed of many single cells connected in series to meet the output voltage and power of a pure electric vehicle. Due to the limitations of the battery manufacturing process, the internal resistance and capacity of the battery and other parameters are often inconsistent. In addition, the unreasonable grouping of batteries and the lack of scientific management seriously affect the performance and life of the power battery pack after grouping. As a result, the power battery cannot provide reliable and stable power output for the vehicle. [0003] As a key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H02J7/00
CPCB60L58/10B60L58/12B60L58/22B60L2240/545B60L2240/547B60L2240/549H02J7/0014Y02T10/70Y02T10/92Y02T90/16
Inventor 谢凯胡攀攀吴定国胡青松胡笑红
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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