Method of balancing batteries
First Claim
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1. A method of balancing voltage between batteries, said method including the steps of:
- sampling a first voltage of one of the batteries at a predetermined interval;
initializing a target balance voltage value to a predetermined voltage for each battery;
sending said first voltage value to all other batteries;
replacing said target balance voltage with said first voltage if said first voltage is lower than said target balance voltage; and
bleeding said battery if a sampled voltage is higher than said target balance voltage.
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Abstract
A methodology for balancing batteries for use in an electric vehicle. The methodology includes initializing a target balance voltage value to a predetermined voltage. Sampling a first voltage of the batteries at a predetermined interval. Sending the lowest voltage value to all of the batteries. Replacing the target value voltage with the lowest voltage if the lowest voltage is lower than the target balance voltage and bleeding the batteries if a sampled voltage is higher than the target balance voltage.
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Citations
21 Claims
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1. A method of balancing voltage between batteries, said method including the steps of:
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sampling a first voltage of one of the batteries at a predetermined interval; initializing a target balance voltage value to a predetermined voltage for each battery; sending said first voltage value to all other batteries; replacing said target balance voltage with said first voltage if said first voltage is lower than said target balance voltage; and bleeding said battery if a sampled voltage is higher than said target balance voltage. - View Dependent Claims (2, 3, 4, 5)
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6. A method of balancing batteries for use in a vehicle having a predetermined number of batteries being arranged in a brick, a predetermined number of bricks being arranged within a battery module and the vehicle having a predetermined number of battery modules therein, each battery module having a battery monitoring board, said method including the steps of:
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sampling a first voltage for each brick at a predetermined time; initializing each of the battery modules with a target balance voltage; determining the lowest voltage for each battery module; replacing said target balance voltage if said lowest voltage is lower than said target balance voltage; and bleeding one of the bricks if said first voltage is greater than said target balance voltage. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of balancing batteries for use in an electric vehicle, the module having a predetermined number of the batteries being arranged in a brick, a predetermined number of bricks being arranged within a battery module or sheet, the electric vehicle also having a predetermined number of battery modules or sheets, each battery module having an associated battery monitoring board which is in communication with every other battery monitoring board, said method including the steps of:
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sampling a voltage for each brick at a predetermined time interval; initializing a target balance voltage value in each battery monitoring board with an initial lowest brick voltage for the battery module controlled by each battery monitoring board; sending an announced lowest brick voltage for each battery module to every other battery monitoring board; comparing in each battery monitoring board said announced lowest brick voltage and said target balance voltage; replacing said target balance voltage with said announced lowest brick voltage if said announced lowest brick voltage is less than said target balance voltage; and bleeding any brick if said sampled voltage is greater than said target balance voltage and is outside of a predetermined voltage delta. - View Dependent Claims (18, 19, 20)
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21. A method of balancing voltage between batteries, said method including the steps of:
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sampling a first voltage of one of the batteries at a predetermined interval; initializing a target balance voltage value to a predetermined voltage for each battery; sending said first voltage value to all other batteries; replacing said target balance voltage with said first voltage if said first voltage is greater than said target balance voltage; and increasing the voltage of said battery if a sampled voltage is less than said target balance voltage.
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Specification