Systems for determining a voltage out-of-range high condition and a voltage out-of-range low condition of a battery module
First Claim
1. A system for determining a voltage out-of-range high condition of a battery module;
- the battery module having at least first, second, and third battery cells, comprising;
a microcontroller determining first, second, and third voltage values based on first, second, and third signals, respectively, corresponding to first, second, and third voltage levels, respectively, of the first, second, and third battery cells, respectively;
the microcontroller determining a battery module voltage value based on a fourth signal;
the microcontroller determining whether at least one of the first, second, and third voltage values is greater than a desired maximum cell voltage value;
the microcontroller replacing the at least one of the first, second, and third voltage values that is greater than the desired maximum cell voltage value with a desired cell voltage value, the desired cell voltage value being less than the desired maximum cell voltage value;
the microcontroller summing the first, second, and third voltage values to obtain a battery module high voltage sum value; and
the microcontroller generating a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module high voltage sum value and the battery module voltage value is greater than or equal to a battery module voltage out-of-range high error value indicating the voltage out-of-range high condition, the battery module voltage out-of-range high error value is equal to a square root of a first sum of squares value therein, the first sum of squares value is equal to a sum of first, second, and third battery cell voltage measurement error square values and a battery module voltage measurement error square value.
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Abstract
A system for determining a voltage out-of-range high condition of a battery module is provided. A microcontroller determines first, second, and third voltage values from first, second, and third voltage sensors, respectively, coupled to first, second, and third battery cells, respectively; and determines a battery module voltage value based on a fourth signal. The microcontroller sums the first, second, and third voltage values to obtain a battery module high voltage sum value. The microcontroller generates a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module high voltage sum value and the battery module voltage value is greater than or equal to a battery module voltage out-of-range high error value.
8 Citations
22 Claims
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1. A system for determining a voltage out-of-range high condition of a battery module;
- the battery module having at least first, second, and third battery cells, comprising;
a microcontroller determining first, second, and third voltage values based on first, second, and third signals, respectively, corresponding to first, second, and third voltage levels, respectively, of the first, second, and third battery cells, respectively;
the microcontroller determining a battery module voltage value based on a fourth signal;the microcontroller determining whether at least one of the first, second, and third voltage values is greater than a desired maximum cell voltage value; the microcontroller replacing the at least one of the first, second, and third voltage values that is greater than the desired maximum cell voltage value with a desired cell voltage value, the desired cell voltage value being less than the desired maximum cell voltage value; the microcontroller summing the first, second, and third voltage values to obtain a battery module high voltage sum value; and the microcontroller generating a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module high voltage sum value and the battery module voltage value is greater than or equal to a battery module voltage out-of-range high error value indicating the voltage out-of-range high condition, the battery module voltage out-of-range high error value is equal to a square root of a first sum of squares value therein, the first sum of squares value is equal to a sum of first, second, and third battery cell voltage measurement error square values and a battery module voltage measurement error square value. - View Dependent Claims (2, 3, 4, 5)
- the battery module having at least first, second, and third battery cells, comprising;
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6. A system for determining a voltage out-of-range high condition of a battery module;
- the battery module having at least first, second, and third battery cells, comprising;
a microcontroller determining first, second, and third voltage values based on first, second, and third signals, respectively, corresponding to first, second, and third voltage levels, respectively, of the first, second, and third battery cells, respectively;
the microcontroller determining a battery module voltage value based on a fourth signal;the microcontroller determining whether at least one of the first, second, and third voltage values is greater than a desired maximum cell voltage value; the microcontroller replacing the at least one of the first, second, and third voltage values that is greater than the desired maximum cell voltage value with a desired cell voltage value, the desired cell voltage value being less than the desired maximum cell voltage value; the microcontroller summing the first, second, and third voltage values to obtain a battery module high voltage sum value; and the microcontroller generating a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module high voltage sum value and the battery module voltage value is greater than or equal to a battery module voltage out-of-range high error value indicating the voltage out-of-range high condition, the battery module voltage out-of-range high error value is equal to a square root of a first sum of squares value therein, the first sum of squares value is equal to a sum of first, second, and third battery cell weighted voltage measurement error square values and a battery module voltage measurement error square value. - View Dependent Claims (7, 8, 9, 10, 11)
- the battery module having at least first, second, and third battery cells, comprising;
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12. A system for determining a voltage out-of-range low condition of a battery module;
- the battery module having at least first, second, and third battery cells, comprising;
a microcontroller determining first, second, and third voltage values based on first, second, and third signals, respectively, corresponding to first, second, and third voltage levels, respectively, of the first, second, and third battery cells, respectively;
the microcontroller determining a battery module voltage value based on a fourth signal;the microcontroller determining whether at least one of the first, second, and third voltage values is less than a desired minimum cell voltage value; the microcontroller replacing at least one of the first, second, and third voltage values that is less than the desired minimum cell voltage value with a desired cell voltage value, the desired cell voltage value being greater than the desired minimum cell voltage value; the microcontroller summing the first, second, and third voltage values to obtain a battery module low voltage sum value; and the microcontroller generating a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module low voltage sum value and the battery module voltage value is greater than or equal to a battery module voltage out-of-range low error value indicating the voltage out-of-range low condition, the battery module voltage out-of-range low error value is equal to a square root of a first sum of squares value therein, the first sum of squares value is equal to a sum of first, second, and third battery cell voltage measurement error square values and a battery module voltage measurement error square value. - View Dependent Claims (13, 14, 15, 17)
- the battery module having at least first, second, and third battery cells, comprising;
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16. A system for determining a voltage out-of-range low condition of a battery module;
- the battery module having at least first, second, and third battery cells, comprising;
a microcontroller determining first, second, and third voltage values based on first, second, and third signals, respectively, corresponding to first, second, and third voltage levels, respectively, of the first, second, and third battery cells, respectively;
the microcontroller further determining a battery module voltage value based on a fourth signal;the microcontroller determining whether at least one of the first, second, and third voltage values is less than a desired minimum cell voltage value; the microcontroller replacing the at least one of the first, second, and third voltage values that is less than the desired minimum cell voltage value with a desired cell voltage value, the desired cell voltage value being greater than the desired minimum cell voltage value; the microcontroller summing the first, second, and third voltage values to obtain a battery module low voltage sum value; and the microcontroller generating a first control signal to induce a contactor to transition to an open operational position to electrically decouple the battery module from an electrical load, if a difference between the battery module low voltage sum value and the battery module voltage value is greater than or equal to the battery module voltage out-of-range low error value indicating the voltage out-of-range low condition, the battery module voltage out-of-range low error value is equal to a square root of a first sum of squares value therein, the first sum of squares value is equal to a sum of first, second, and third battery cell weighted voltage measurement error square values and a battery module voltage measurement error square value. - View Dependent Claims (18, 19, 20, 21, 22)
- the battery module having at least first, second, and third battery cells, comprising;
Specification