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Series storage battery pack monitoring diagnosis and equalization circuit and strategy

A battery pack and balancing circuit technology, which is applied to charge balancing circuits, battery circuit devices, circuit devices, etc., and can solve problems affecting battery life and other issues

Active Publication Date: 2020-06-26
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Performing square wave chopping on the battery is essentially intensive and intermittent charging and discharging of the battery. Long-term square wave chopping on the battery to achieve balance will affect the life of the battery

Method used

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  • Series storage battery pack monitoring diagnosis and equalization circuit and strategy
  • Series storage battery pack monitoring diagnosis and equalization circuit and strategy
  • Series storage battery pack monitoring diagnosis and equalization circuit and strategy

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Embodiment Construction

[0066] The present invention will be described in detail below in conjunction with the accompanying drawings. A circuit for monitoring, diagnosing, and balancing of series battery packs includes the following technical solutions:

[0067] like figure 1 As shown, the monitoring, diagnosis and balancing circuit of the battery pack in series includes a charger 1, a voltage source 2, a voltage-controlled constant current source 3, a voltage measurement module 4, a temperature measurement module 5, and a load resistor R L , Switches K01, K02, K03, K04, K11~K1N and K21~K2N, N is the number of batteries.

[0068] The two ends of the series battery pack B1 to BN to be tested are connected in parallel with the charger 1 . The negative electrodes of each battery in the series battery packs B1-BN are respectively connected to one end corresponding to the switches K21-K2N, and the other ends of the switches K21-K2N are all grounded. The positive electrode of each battery in the series b...

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Abstract

The invention discloses a series storage battery pack monitoring diagnosis and equalization circuit and strategy. The storage battery pack monitoring diagnosis and equalization circuit comprises a charger, a voltage source, a voltage-controlled constant-current source, a voltage measurement module, a temperature measurement module, a load resistor, switches K01, K02, K03 and K04, switches K11-K1Nand switches K21-K2N. In the storage battery pack equalization strategy, the voltage-controlled constant-current source is adopted to realize continuous charging and discharging, two variables, namely, the terminal voltage and the voltage deviation value of each single battery are used as input variables, and a fuzzy logic algorithm is used to estimate the battery equalization voltage regulation quantity and the control voltage of a voltage control module of the corresponding voltage-controlled constant-current source in order to regulate the charging and discharging current during battery equalization. The internal resistance relative variation obtained through pulse discharge and the charge relative variation in the equalization process are used as input variables for storage battery pack monitoring diagnosis, and the battery state is estimated by using the fuzzy logic algorithm.

Description

technical field [0001] The invention relates to the field of battery detection and battery management systems, in particular to a monitoring and diagnosis, equalization circuit and strategy of a battery pack connected in series. Background technique [0002] The series lead-acid battery pack as a backup power supply has always been a standard solution for emergency and backup power supplies such as communication base stations and power stations. When the lead-acid battery pack is charged as a whole, affected by the internal resistance of the battery pack, differential voltage, self-discharge and other factors, it is impossible to ensure that each battery cell is evenly distributed to the charging voltage, resulting in differences in the voltage of the battery cells, resulting in imbalance , affect the use effect and life. The terminal voltage of the battery that has been in the floating charge state for a long time always shows a normal state. Even if there is a problem, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G01R31/367G01R31/382
CPCH02J7/0014H02J7/0016G01R31/367G01R31/382Y02E60/10
Inventor 陈希李映雪刘洋陈赵江蔡建程丁宇
Owner ZHEJIANG NORMAL UNIVERSITY
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