Differential current monitoring for parallel-connected batteries
First Claim
1. A system for determining battery internal short circuits based on inter-battery current monitoring, the system comprising:
- a first battery;
a second battery, the second battery being connected in parallel with the first battery; and
an inter-battery current measurement module comprising at least one current measuring device, the inter-battery current measurement module being configured to;
determine an inter-battery current associated with the first battery and the second battery, the inter-battery current comprising a transfer of charge between the first battery and the second battery; and
detect an internal short circuit in the first battery based on the determined inter-battery current,determine an average value of the inter-batter current over a predetermined time period, anddetect the internal short circuit in the first battery based on the determined average value,wherein detecting the internal short circuit in the first batter based on the determined average value comprises detecting a shift in the magnitude in the average value of the inter-battery current during the predetermined time period.
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Accused Products
Abstract
A system for determining battery characteristics based on differential current monitoring includes a first battery; a second battery, the second battery being connected in parallel with the first battery; and a differential current measurement module comprising at least one current measuring device, the differential current measurement module being configured to determine a differential current associated with the first battery and the second battery. A method for determining battery characteristics based on differential current monitoring includes determining a differential current associated with a first battery and a second battery, the first battery being connected in parallel with the second battery.
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Citations
20 Claims
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1. A system for determining battery internal short circuits based on inter-battery current monitoring, the system comprising:
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a first battery; a second battery, the second battery being connected in parallel with the first battery; and an inter-battery current measurement module comprising at least one current measuring device, the inter-battery current measurement module being configured to; determine an inter-battery current associated with the first battery and the second battery, the inter-battery current comprising a transfer of charge between the first battery and the second battery; and detect an internal short circuit in the first battery based on the determined inter-battery current, determine an average value of the inter-batter current over a predetermined time period, and detect the internal short circuit in the first battery based on the determined average value, wherein detecting the internal short circuit in the first batter based on the determined average value comprises detecting a shift in the magnitude in the average value of the inter-battery current during the predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for determining battery internal short circuits based on inter-battery current monitoring, the system comprising:
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a first battery; a second battery, the second battery being connected in parallel with the first battery; and an inter-battery current measurement module comprising a switch and a current measuring device located between the first battery and the second battery, the inter-battery current measurement module configured to; determine a inter-battery current associated with the first battery and the second battery using the switch and the current measuring device, the inter-battery current comprising a transfer of charge between the first battery and the second battery; and detect an internal short circuit in the first battery based on the inter-battery current, wherein the switch and the current measuring device comprising a metal-oxide-semiconductor field effect transistor (MOSFET), and wherein the inter-battery current is determined based on a drain-source voltage of the MOSFET. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for determining battery internal short circuits based on inter-battery current monitoring, the method comprising:
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determining an inter-battery current associated with a first battery and a second battery, the first battery being connected in parallel with the second battery, the inter-battery current comprising a transfer of charge between the first battery and the second battery; and detecting an internal short circuit in the first battery based on the determined inter-battery current, determine an average value of the inter-battery current over a predetermined time period, and detecting the internal short circuit in the first battery based on the determined average value, wherein detecting the internal short circuit in the first battery based on the determined average value comprises detecting a shift in the magnitude in the average value of the inter-battery current during the predetermined time period. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification