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Battery discharge balancing method

An equalization method and battery discharge technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of battery imbalance, increase in use cost, and identical batteries, so as to achieve power balance, reduce power consumption, and guarantee The effect of accuracy

Active Publication Date: 2018-05-18
深圳金三普电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the battery itself cannot be exactly the same in the process, there will be an imbalance between the batteries after multiple charges and discharges, resulting in circulation between multiple batteries, etc., which will affect the battery life.
[0003] The existing equalization devices are all set in a specific way, that is, there is no way to achieve equalization through simple structural improvements directly on the structure of the existing batteries and chargers, and the entire set of equipment needs to be replaced, which greatly increases the cost of use; and The existing equalization equipment is to further discharge the battery, such as discharging to the resistor and capacitor, and further charge the battery. However, this equalization method is extremely unfavorable when the battery is often used, because there is no Sufficient time for additional charging and discharging of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A battery discharge equalization method, characterized in that,

[0024] (1) Judging the discharge demand:

[0025] The load identification circuit detects whether there is a load that needs power supply, and sends the detection result to the controller. The controller judges whether the next step is to implement step (2) or step (3) according to the detection result. If the detection result shows that there is no load that requires power The supplied load then implements step (2), and if the detection result shows that there is a load that needs power supply, then jump to step (3);

[0026] (2) Calculate battery properties:

[0027] The controller detects whether there is an input current to the whole of the N series-connected battery modules, and if not, controls a battery voltage detection device to connect with the positive and negative battery connection terminals of the battery module body in each battery module in turn to detect each battery module The voltage ...

Embodiment 2

[0035] The difference from Embodiment 1 is that a bidirectional DC / AC module is used to replace the bidirectional DC / DC module. Specifically:

[0036] A battery discharge equalization method, characterized in that,

[0037] (1) Judging the discharge demand:

[0038] The load identification circuit detects whether there is a load that needs power supply, and sends the detection result to the controller. The controller judges whether the next step is to implement step (2) or step (3) according to the detection result. If the detection result shows that there is no load that requires power The supplied load then implements step (2), and if the detection result shows that there is a load that needs power supply, then jump to step (3);

[0039] (2) Calculate battery properties:

[0040] The controller detects whether there is an input current to the whole of the N series-connected battery modules, and if not, controls a battery voltage detection device to connect with the positi...

Embodiment 3

[0048] The difference from Embodiment 1 is that a storage battery power detection device is used to replace a storage battery voltage detection device. When none of the N storage battery modules are used, that is, the N storage battery modules are neither charged nor discharged, the control The controller controls the one battery power detection device to be sequentially connected to each battery module to detect the SOC of the battery body in each battery module. The controller sorts the N battery modules in descending order of the battery body soc to form a battery sequence.

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PUM

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Abstract

The invention discloses a battery discharge balancing method. The method includes (1) judging discharge demand; (2) calculating storage battery property; (3) calculating bidirectional DC / DC converterperformance; (4) forming a pairing relation. According to the invention, through calculating the storage battery property and the bidirectional DC / DC converter performance, automatic power balance ofthe battery in the discharge process is realized and balancing effectiveness is ensured.

Description

technical field [0001] The invention relates to a battery discharge equalization method, in particular to a battery discharge equalization method which can balance the battery without changing the structure of the existing battery and charger. Background technique [0002] There are level settings for battery voltage and current. Therefore, when the required power quality cannot be achieved with one battery, multiple batteries are usually connected in series, parallel or series-parallel to provide greater voltage and current. At this time, these connected batteries will realize the process of charging and discharging as a whole at the same time. However, because the battery itself cannot be exactly the same in terms of process, there will be an imbalance between the batteries after multiple charges and discharges, which will lead to circulation among multiple batteries and affect the battery life. [0003] The existing equalization devices are all set in a specific way, tha...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0063
Inventor 刘慧
Owner 深圳金三普电子有限公司
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