An automatic gapless bypass system for battery packs

Abstract

The invention relates to an automatic zero-clearance by-pass connection system for a storage battery pack. The automatic zero-clearance by-pass connection system is characterized in that a single battery management unit (3) is directly connected with each storage battery (7) through positive and negative sampling wiring harnesses (8); each storage battery (7) is provided with one single battery management unit (3); all the single battery management units (3) are hung on a network bus (6) through a 485 communication wiring harness (9) and then are uniformly connected into a battery pack general control unit (2); meanwhile, a current sensor module (5) is used for carrying out communication accessing on discharging current of the whole set of the storage batteries (7) and a temperature sensor module (4) is used for carrying out communication accessing on environment temperatures of the whole set of the storage batteries (7) through a 485 communication port and the battery pack general control unit (2), so as to realize real-time monitoring of the whole set of the storage batteries; meanwhile, the battery pack general control unit (2) is used for predicating the performance of the storage batteries. The automatic zero-clearance by-pass connection system can be used for carrying out real-time monitoring on normal operation of the storage battery pack and directly discharging falling-behind or fault batteries without clearances.

Description

technical field [0001] The invention belongs to the technical field of battery pack operation and maintenance management, and in particular relates to a battery pack automatic seamless bypass connection system, which is mainly used in electric power, communication, finance, mining, media, power supply and other industries. Background technique [0002] At present, under most application conditions, batteries are used in series in groups. In electric power and some other industrial occasions, these series-connected battery packs are usually used in combination with conventional rectified power supplies (including charging power supplies). The rectified power supplies provide electrical energy to the entire system and float-charge the battery packs used as backup power supplies. If the rectifier power supply is cut off, the battery pack will change from the backup power supply to the main power supply to supply power to the system. At this time, the reliability of the battery...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic gapless bypass connection system for battery packs, which solves the problem of inaccurate monitoring, high maintenance costs, and unsafety in the existing technology for battery operation and maintenance management, and it is impossible to avoid the failure of the entire battery pack due to a single battery failure. Problems and defects of power failure, by establishing a real-time monitoring and early warning system for battery packs, a system for automatic seamless bypassing of batteries is proposed, and the technical solution adopted to achieve the purpose of the present invention is: a battery pack Automatic gapless bypass system, including the single battery management unit installed on each battery, and the battery pack master control unit for unified management of all single battery management units, the single battery management unit and each battery through positive and negative two The root sampling wiring harness is directly connected, and each battery is equipped with a single battery management unit. All single battery management units are connected to the battery pack master control unit after being hung on the network bus through the 485 communication harness. At the same time, the current sensor module connects the entire battery pack discharge current, and the temperature sensor module communicates the ambient temperature of the entire battery pack with the battery pack master control unit through the 485 communication interface to realize real-time monitoring of the whole pack of batteries, and at the same time, the battery pack master control unit predicts the battery performance; The single battery management unit in the system is the core equipment of the system. Each battery is equipped with one piece, 2V, 6V, and 12V batteries are acceptable. The battery voltage, internal resistance, and temperature monitoring can be realized through the single battery management unit, and the realization of There is no gap bypass function for the battery; the single battery management unit is connected to the positive and negative poles of the battery through the sampling harness, and a protection unit is connected in series on the negative sampling harness to prevent the battery from being damaged by overcurrent, and then connected to the battery after passing through the core module The positive pole of the battery is connected, and the core module is composed of the current control module and the sampling module to realize the constant current output and gapless bypass function; at the same time, the core CPU processing unit of the single battery management unit (through the processing bus (respectively interacting with the sampling module to realize the voltage, Monitoring of temperature and internal resistance, interacting with the communication module, realizing the information transmission between the data and the battery pack master control unit, realizing the display of operation, alarm and abnormal information through the interaction of the indicator light display module, and realizing the data storage function through the storage module It is characterized in that: the core module is composed of a constant current discharge unit and a bypass module, which mainly completes the monitoring of the single battery management unit and the automatic gapless bypass function, and the data collected by the constant current discharge unit through the sampling module is processed by the CPU Unit (after analysis, it is controlled by the current control module, and the bypass module is reversed by a high-current and high-power reverse diode and connected between the two poles of the battery. The battery is withdrawn from the whole group without gaps, and the output current of the whole group of batteries is conducted through the bypass module to form a new discharge circuit to supply power to the outside, so as to realize the automatic gapless bridging function of the system and ensure the reliability of the power supply of the whole group of batteries. Connect the diode to select a 40-200A diode according to the current load of the DC system

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