Method and device for managing batteries of a battery system
First Claim
1. Method for managing a battery system including a number of serially-coupled batteries comprising:
- detecting different battery voltages over at least two serially-coupled batteries of the battery system;
controlling the voltage distribution of the two serially-coupled batteries by controlling the potential at an intermediate connection point between the two serially-coupled batteries to purposefully create an applied voltage imbalance between the two serially-coupled batteries of the battery system; and
utilizing the applied voltage imbalance between different serially-coupled batteries of the system during operation of the battery system.
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Accused Products
Abstract
Method for managing a battery system including a number of serially coupled batteries in a flexible, reliable, and cost effective way and that can be used in a wide variety of applications, such as tools, for example, hand tools, cars, boats, back-up systems, buses, trucks, golf carts, wheel chairs, electric cars and fork-lift trucks. The method includes the steps of detecting the battery voltage over each individual battery of the battery system; and utilizing a voltage imbalance between different batteries of the system during operation of the battery system. Furthermore, the method controls the voltage distribution of the batteries to create a voltage imbalance between different batteries of the battery system.
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Citations
19 Claims
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1. Method for managing a battery system including a number of serially-coupled batteries comprising:
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detecting different battery voltages over at least two serially-coupled batteries of the battery system; controlling the voltage distribution of the two serially-coupled batteries by controlling the potential at an intermediate connection point between the two serially-coupled batteries to purposefully create an applied voltage imbalance between the two serially-coupled batteries of the battery system; and utilizing the applied voltage imbalance between different serially-coupled batteries of the system during operation of the battery system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for managing a battery system including a number of serially-coupled batteries, comprising:
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voltage detecting means connected to said battery system and arranged to detect the battery voltage over the serially-coupled batteries of the battery system; DC-to-DC-converting means connected to said battery system; and a controller connected to said voltage sensing means and to said DC-to-DC-converting means and being arranged to control the voltage distribution over the serially-coupled batteries of the battery system via said DC-to-DC-converting means by controlling the potential at an intermediate connection point between the two serially coupled batteries to purposefully create an applied voltage imbalance between different serially-coupled batteries of the battery system. - View Dependent Claims (10, 11, 12, 13)
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14. A device for managing a battery system including multiple serially-coupled batteries, comprising:
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a voltage detector arranged to detect the battery voltage for a first battery and a second battery in the battery system, which first and second battery are serially-coupled; a battery charger; and a controller connected to the voltage detector and to the battery charger and being arranged to receive from the voltage detector a first detected voltage for the first battery and a second detected voltage for the second battery that is different than the first detected voltage, the controller being further arranged to control the battery charger to charge the first battery at a first charging voltage based on the first detected battery voltage and to charge the second battery at a second different charging voltage based on the detected second battery voltage by controlling the potential at an intermediate connection point between the two serially coupled batteries. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification