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Battery management system and operating an energy store for electrical energy

A technology for battery management systems and accumulators, applied in battery circuit devices, different battery charging, battery/fuel cell control devices, etc., can solve problems that affect service life and aggravate aging

Pending Publication Date: 2021-12-31
梅赛德斯-奔驰集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contrary user behavior may for example be that the user always only charges the battery briefly to ensure the minimum required capacity, but the battery generally remains in the lower part of the state of charge range or operating zone, which may be unfavorable depending on the temperature zone or season affect the service life
[0004] Aging is further exacerbated because the operating state intervals are not optimally matched to the corresponding user behavior

Method used

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  • Battery management system and operating an energy store for electrical energy
  • Battery management system and operating an energy store for electrical energy
  • Battery management system and operating an energy store for electrical energy

Examples

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Embodiment Construction

[0074] figure 1 An exemplary embodiment of a motor vehicle 1 according to a development is shown. In particular, the motor vehicle 1 has an electrical energy store 2 , which can be designed, for example, as a lithium-ion battery, and a battery management system 3 according to the improved concept for controlling the operation of the electrical energy store 2 .

[0075]The battery management system 3 has a state-of-charge sensor 4 , which is configured, for example, to determine the cell voltage of the energy storage device 2 . The battery management system 3 also has a control unit 5 connected to the state-of-charge sensor 4 to receive sensor signals generated by the state-of-charge sensor 4 in dependence on the determined cell voltage. The control unit 5 can determine the state of charge of the accumulator 2 on the basis of the sensor signal, for example by comparison with a defined charge characteristic of the accumulator 2 . The charge characteristics can be stored, for e...

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Abstract

The invention relates to a method for operating an energy store (2) with a charging status range (7). In addition, an operating range (8) is provided within the charging status range (7), and a respective one or more aging characteristic values (11, 12) accumulated over an operating duration of the energy store (2) are determined by means of a control unit (5) based on one or more predefined aging functions (9, 10). The operating range (8) is adjusted according to the aging characteristic values (11, 12), and a charging status of the energy store (2) is limited to the adjusted operating range (8', 8'').

Description

technical field [0001] The invention relates to a method for operating an electrical energy storage device, wherein the storage device has a state of charge range and an operating range within the state of charge range is predetermined. The invention also relates to a corresponding battery management system as well as a motor vehicle and a computer program. Background technique [0002] Accumulators or rechargeable batteries age due to different physical effects. For example, electrolytes in lithium-ion accumulators age at high cell voltages, i.e. especially at high states of charge and at high temperatures, while copper conductors, for example on the anode, at lower cell voltages, That is, aging is accelerated at lower states of charge. For this reason, in known battery management systems, an operating range is fixedly set for the battery, so that certain subsections of the state-of-charge range, in particular near the maximum and minimum charge levels, are specifically e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L58/13B60L58/16G01R31/392
CPCH02J7/0047G01R31/392B60L58/16B60L58/13Y02T10/70B60L3/12
Inventor M·克洛普费尔S·科尔布E·哈特曼
Owner 梅赛德斯-奔驰集团股份公司
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