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Battery management equipment for vehicles

A battery management and equipment technology, applied in vehicle energy storage, secondary batteries, vehicle components, etc., can solve problems such as reducing fuel efficiency and electrical efficiency, power consumption, and cell voltage not being properly controlled

Active Publication Date: 2016-08-10
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the longer time taken for cell balancing consumes a large amount of power, reducing fuel efficiency and electrical efficiency
Unfortunately, traditional approaches to cell balancing of cell voltages have the problem that differences in cell voltages are not properly controlled in some types of vehicles and / or in some ways in which battery packs are used

Method used

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  • Battery management equipment for vehicles
  • Battery management equipment for vehicles
  • Battery management equipment for vehicles

Examples

Experimental program
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Embodiment Construction

[0042] Description will now be made regarding the battery management device with reference to the accompanying drawings. The following embodiments and modifications are merely exemplary, and there is no intention to exclude another modification and application of technology not mentioned in the following description. Elements of the following embodiments can be changed or modified without departing from the subject matter, and can be omitted when necessary and properly combined.

[0043] 1. Configuration of battery management equipment:

[0044] The battery management unit (BMU) 7 of the first embodiment is suitable for figure 1 vehicles10. The vehicle 10 is a plug-in hybrid vehicle that travels using an engine 11 and a motor 12 combined with each other. A battery 13 as a power source of the motor 12 is installed at an arbitrary position of the vehicle 10 .

[0045] The motor 12 is a motor generator and has functions of: driving the vehicle 10 using electric power of the b...

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PUM

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Abstract

The battery management unit for a vehicle includes a charger (14) mounted on the vehicle (10) for charging an assembled battery (13) including a plurality of cells (9) with electric power from an external power source; a memory (1) that records which cell is a lowest cell having the lowest voltage when the assembled battery (13) is fully charged; and a cell-balancer (5) that carries out cell-balancing on the voltage of the assembled battery (13) by discharging, when the charger (14) is not charging the assembled battery (13), one or more cells (9) each having a voltage higher than a current voltage of the lowest cell (9) to the current value of the lowest cell (9). Thereby, it is possible to suppress an increase in dispersion of voltages and reduction in battery capacity.

Description

technical field [0001] The present invention relates to a battery management device that controls charging and discharging of a battery pack mounted on a vehicle. Background technique [0002] Regarding a conventional battery pack formed by coupling a plurality of secondary battery cells, one known technique balances (equalizes) the voltages of the individual cells when the cells are being used or being charged. Specifically, this technology balances the individual voltages of the cells in order to reduce the difference in voltage (difference in voltage) with the aim of maximizing the battery capacity of the entire battery pack. Balancing the cell voltages while the battery pack is being charged makes it possible to increase the amount of power charged to the remaining cells until the highest voltage of one cell among the cells included in the battery pack exceeds the upper limit voltage. Similarly, balancing cell voltages while the battery pack is being used makes it possi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCB60L58/22H02J7/0016Y02E60/10Y02T10/70Y02T10/7072Y02T90/14B60L53/00H01M10/44H01M10/441H01M10/446H01M10/448H02J7/0014
Inventor 多贺谷直人村松克好
Owner MITSUBISHI MOTORS CORP