Diagnostic system for a battery system
First Claim
1. A diagnostic system for a battery system having a battery module electrically coupled to a contactor, the battery module having a first battery cell, comprising:
- a first microcontroller initializing a first battery cell analog overvoltage flag associated with the first battery cell to a first initialization value;
the first microcontroller receiving a first output voltage value from a second microcontroller that corresponds to a first output voltage from the first battery cell;
the first microcontroller setting the first battery cell analog overvoltage flag equal to a first battery cell analog overvoltage flag value if the first output voltage value is greater than a first threshold voltage value;
the first microcontroller transitioning the contactor to an open operational state if the first battery cell analog overvoltage flag is equal to the first battery cell analog overvoltage flag value;
the first microcontroller initializing a battery cell comparator overvoltage flag to the second initialization value;
the first microcontroller receiving a first comparator bit, from the second microcontroller;
the first comparator bit having a first fault value if the first output voltage is greater than a voltage comparator threshold voltage;
the first microcontroller setting the first battery cell comparator overvoltage flag equal to the first battery cell comparator overvoltage flag value if the first comparator bit is equal to the first fault value; and
the first microcontroller transitioning the contactor to the open operational state if the first battery cell comparator overvoltage flag is equal to the first battery cell comparator overvoltage flag value.
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Accused Products
Abstract
A diagnostic system for a battery system having a battery module electrically coupled to a contactor is provided. The battery module has first, second, and third battery cells. The diagnostic system includes a first microcontroller that transitions the contactor to an open operational state if the first battery cell analog overvoltage flag is equal to the first battery cell analog overvoltage flag value. The first microcontroller further transitions the contactor to the open operational state if the first battery cell comparator overvoltage flag is equal to the first battery cell comparator overvoltage flag value.
18 Citations
16 Claims
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1. A diagnostic system for a battery system having a battery module electrically coupled to a contactor, the battery module having a first battery cell, comprising:
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a first microcontroller initializing a first battery cell analog overvoltage flag associated with the first battery cell to a first initialization value; the first microcontroller receiving a first output voltage value from a second microcontroller that corresponds to a first output voltage from the first battery cell; the first microcontroller setting the first battery cell analog overvoltage flag equal to a first battery cell analog overvoltage flag value if the first output voltage value is greater than a first threshold voltage value; the first microcontroller transitioning the contactor to an open operational state if the first battery cell analog overvoltage flag is equal to the first battery cell analog overvoltage flag value; the first microcontroller initializing a battery cell comparator overvoltage flag to the second initialization value; the first microcontroller receiving a first comparator bit, from the second microcontroller;
the first comparator bit having a first fault value if the first output voltage is greater than a voltage comparator threshold voltage;the first microcontroller setting the first battery cell comparator overvoltage flag equal to the first battery cell comparator overvoltage flag value if the first comparator bit is equal to the first fault value; and the first microcontroller transitioning the contactor to the open operational state if the first battery cell comparator overvoltage flag is equal to the first battery cell comparator overvoltage flag value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A diagnostic system for a battery system having first and second battery modules electrically coupled in series to a contactor, the first battery module having at least a first battery cell;
- the second battery module having at least a first battery cell, comprising;
a memory device having first, second, and third tables stored therein;
the first table having first and second battery module numbers associated with the first and second battery modules, respectively;
the first and second battery module numbers having a Hamming distance of at least two from each other;a first microcontroller reading the first table stored in the memory device to obtain the first and second battery module numbers; the first microcontroller setting a first battery cell analog overvoltage flag associated with the first battery cell in the first battery module to a first value; the first microcontroller storing the first battery cell analog overvoltage flag and the first battery module number in a first record in the second table; the first microcontroller setting a first battery cell comparator overvoltage flag associated with the first battery cell in the first battery module to a second value; the first microcontroller storing the first battery cell comparator overvoltage flag and the first battery module number in a first record in the third table. - View Dependent Claims (12, 13, 14, 15, 16)
- the second battery module having at least a first battery cell, comprising;
Specification