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Equalizer overload management

A technology of balancing current and battery, applied in charge balancing circuits, instruments, current collectors, etc., can solve problems such as electrode damage, permanent damage to the upper battery due to overcharge, electrical system failure, etc.

Pending Publication Date: 2020-09-11
VOLVO CONSTR EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unequal charge on the batteries, it can cause the upper battery to overcharge and become permanently damaged
At the same time, the lower battery may not be fully charged, making it prone to electrode damage due to insufficient charging
Either of these conditions can shorten the battery life of the upper battery and / or the lower battery and could lead to failure in the electrical system

Method used

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  • Equalizer overload management
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Examples

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Embodiment Construction

[0038] Although, as described above, battery equalizers can be used to help balance the charging and discharging of batteries connected in series in a dual voltage electrical system, situations may arise where the battery equalizer saturates and fails to supply enough current to one of the batteries. When a battery equalizer is saturated, it may not be able to supply a sufficient level of current to the lower battery to maintain equal charge on the lower and upper batteries in a dual voltage electrical system. As mentioned above, in a dual voltage system, when the lower battery discharges at a faster rate than the upper battery, during subsequent charge cycles, the upper battery may become overcharged and / or the lower battery may become undercharged, which may cause Shorten the life of the battery system and in some cases may cause the failure of the 12V system.

[0039] Some embodiments address one or more of the above issues by providing an equalizer management system that m...

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Abstract

A method of operating an electrical system is provided. The electrical system includes a first battery, a second battery coupled in series with the first battery, and a battery equalizer coupled to the first battery and the second battery and configured to supply an equalizing current to the first battery. The method includes monitoring a level of the equalizing current, determining, based on monitoring of the level of the equalizing current, that the equalizing current is saturated, and reducing a level of current supplied at a positive terminal of the first battery in response to determiningthat the equalizing current is saturated. The methods may take an action to reduce the demand for current that is supplied by the first battery.

Description

technical field [0001] The inventive concept relates to vehicle electrical systems, and more particularly to dual voltage battery systems for vehicles. Background technique [0002] Some vehicles, including heavy construction vehicles, may include a twenty-four volt (24V) electrical system for powering various loads in the vehicle. Figure 9A The 24V vehicle electrical system is shown in . Such as Figure 9A As shown in , the electrical system includes first and second twelve volt (12V) batteries (ie, a lower battery and an upper battery) arranged in series to provide a total of 24 volts to power a 24V load. In this arrangement, the batteries are referred to as "lower battery" and "upper battery" because the positive terminal of the upper battery has a higher potential than the positive terminal of the lower battery. Thus, a 24V load can be powered from the positive terminal of the upper battery, while a 12V load can be powered from the positive terminal of the lower batter...

Claims

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Application Information

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IPC IPC(8): B60R16/02H02J7/04H01M10/44G01R19/165
CPCH01M2220/20H01M10/425H01M2010/4271H01M10/4207H01M10/441H01M10/482H02J7/1423H02J7/0013G01R19/16542H02J2310/40Y02T10/70Y02E60/10H02J7/0014H02J7/0048H02J7/0016H02J7/007194H02J7/00714
Inventor 格雷戈尔·阿图尔杜普莱斯西弗雷德里克·莱罗伊
Owner VOLVO CONSTR EQUIP
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