Modular battery controller
First Claim
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1. An apparatus, comprising:
- a string of battery cells;
a plurality of master-less controllers, wherein each one of the plurality of controllers is conductively connected to a corresponding battery cell in the string; and
a communication bus communicably coupled to each one of the master-less controllers;
wherein each controller is configured to;
determine a voltage of its corresponding battery cell via a direct conductive connection between the controller and its corresponding battery cell;
receive, via the communication bus, a voltage of an additional battery cell of the string corresponding to another one of the controllers, wherein the additional voltage was measured by the other controller;
determine that a difference between the voltage and the additional voltage is above a threshold amount; and
in response to the determination, bypass a fraction of current around its corresponding cell to diminish the difference.
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Abstract
Some embodiments of the present invention describe a battery including a plurality of master-less controllers. Each controller is operatively connected to a corresponding cell in a string of cells, and each controller is configured to bypass a fraction of current around the corresponding cell when the corresponding cell has a greater charge than one or more other cells in the string of cells.
22 Citations
20 Claims
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1. An apparatus, comprising:
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a string of battery cells; a plurality of master-less controllers, wherein each one of the plurality of controllers is conductively connected to a corresponding battery cell in the string; and a communication bus communicably coupled to each one of the master-less controllers; wherein each controller is configured to; determine a voltage of its corresponding battery cell via a direct conductive connection between the controller and its corresponding battery cell; receive, via the communication bus, a voltage of an additional battery cell of the string corresponding to another one of the controllers, wherein the additional voltage was measured by the other controller; determine that a difference between the voltage and the additional voltage is above a threshold amount; and in response to the determination, bypass a fraction of current around its corresponding cell to diminish the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-implemented method comprising
measuring, by a first master-less controller of a charge control apparatus, a first voltage of a first battery cell in a string of battery cells, wherein the first master-less controller has a direct conductive connection to the first battery cell, wherein the charge control apparatus includes a plurality of master-less controllers, each of the master-less controllers directly connected to a different corresponding battery cell in the string of battery cells; -
receiving, by the first master-less controller, a plurality of voltages of a plurality of battery cells from master-less controllers corresponding to different ones of the plurality of battery cells; determining, by the first master-less controller, a maximal difference between the first voltage and one of the plurality of voltages; and in response to the maximal difference being greater than a first threshold value, bypassing, by the first master-less controller, a fraction of current around the first battery cell. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus comprising:
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a string of battery cells; a plurality of master-less controllers, wherein each one of the plurality of controllers is conductively connected to a corresponding battery cell in the string; a communication bus communicably coupled to each one of the master-less controllers; wherein each controller is configured to; determine a voltage of its corresponding battery cell via a direct conductive connection between the controller and its corresponding battery cell; receive an overall voltage provided by the string of batteries via a first power line; determine that a neighboring one of the controllers is inactive based on not receiving an identifier associated with that neighboring controller, wherein the neighboring controller is directly connected to another one of the battery cells; and in response to the determination, calculate a neighboring voltage of the other battery cell based on the voltage of its corresponding battery cell and the overall voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification