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Modular energy storage system for driving electric motor

An energy storage system and modular technology, applied in electric vehicles, measuring electrical variables, measuring electricity, etc., can solve problems such as failures, high maintenance costs, and lower overall efficiency

Inactive Publication Date: 2012-04-25
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Given the normal distribution of capacities of battery modules or secondary cells, the weakest cell or battery module in a battery pack can be the limiting factor in that battery pack, thereby reducing overall efficiency
If one secondary cell or battery module fails, the system cannot provide the required power output and may even fail together
When this happens, the entire battery pack often must be replaced, resulting in high repair costs

Method used

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  • Modular energy storage system for driving electric motor
  • Modular energy storage system for driving electric motor
  • Modular energy storage system for driving electric motor

Examples

Experimental program
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Embodiment Construction

[0051] figure 1 The invention is depicted applied to a battery pack 10 of a battery powered vehicle, which may be electric and hybrid electric vehicles, or any other type of vehicle. In this example, the battery monitoring unit 11 is used to monitor the operation and status of six battery modules 12 . The battery monitoring unit 11 may be installed adjacent to or remotely from the battery pack 10 .

[0052]The battery monitoring unit 11 determines a state of health (SOH) based on performance related parameters such as temperature, voltage, battery impedance, battery pack current and battery monitoring unit equalization current. The amount of energy stored in or delivered from each battery module 12 is monitored, and the amount of energy stored in and / or delivered by each battery module 12 can be individually monitored by the battery monitoring unit 11 adjustment to balance or equalize the amount of energy distributed among the battery modules 12 .

[0053] refer to figure ...

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Abstract

The invention relates to a battery module for a battery system comprising at least two battery modules, where each battery module is provided with a module monitoring unit (13) arranged to monitor at least one performance related parameter for each secondary cell (14) in the battery module. Parameters relating to the performance for each battery module are stored in a memory on the respective module monitoring unit (13). The invention further relates to an energy storage system with a battery pack comprising such a battery monitoring unit (11) for monitoring the battery pack and a modular system of battery packs, each comprising at least two replaceable, interchangeable battery modules (12). Said energy storage system can further comprise super- or ultracapacitor modules.

Description

technical field [0001] The invention relates to the technical field of energy storage systems for driving at least one static electric motor or at least one electric motor arranged to drive a land vehicle or watercraft. Background technique [0002] An energy storage system for driving at least one static electric motor or at least one electric motor arranged to drive a land vehicle or watercraft usually includes a battery pack with a plurality of secondary cells connected in series. [0003] For example, individual battery modules formed from one or more secondary cells may not have the same capacity, and some deviation in capacity may occur due to manufacturing and other differences. Given the normal distribution of capacities of battery modules or secondary batteries, the weakest cell or battery module in a battery pack can become the limiting factor in the battery pack, thereby reducing overall efficiency. If one secondary cell or battery module fails, the system cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18G01R31/36H02J7/00
CPCY02T10/7061Y02T10/7011B60L2260/44G01R31/3606B60L11/1866Y02T10/7005B60L11/1857G01R31/382B60L58/16B60L58/22Y02T10/70
Inventor 耶斯佩尔·马尔腾
Owner VOLVO LASTVAGNAR AB