American Power Conversion Corporation

A123 Systems LLC

Nec Energy Solutions, Inc.

Schneider Electric It Corporation

American Energy Storage Innovations, Inc.

C Michael Hoff

Daniel C Cohen

David A Colucci

James E Nelson

James S Spitaels

Vishwas Mohaniraj Deokar

Andrew C Chu

Matthew Fletcher Bush

Greg Tremelling

Robert Joseph Backofen

Philip C Hopkins

Bud Collins

Peter Gottlieb

Gilbert N Riley, Jr

Antoni S Gozdz

Ricardo Fulop

Yevgeny Maltsev

Jonah S Myerberg

Thomas Farkas

Oleg Kerbel

Benjamin Craig Shaffer

Tom De Lucia

Scott H Reitsma

Erik Nelson

Charles Vartanian

A system architecture for grid electrical energy storage comprising substantial numbers of cells connected in parallel. The lowest level of modularity comprising about eighteen or more individual cells connected in parallel. The disclosed architecture reduces the number of parts, complexity, and variability, while increasing one or more of reliability, service life, and energy capacity of a large-scale grid energy storage system, relative to a conventional multi-parallel string architecture.

Grid energy storage system featuring massively parallel-connected cells

Systems and methods of providing integrated battery protection for a plurality of series-connected batteries, in which a plurality of controllable switches are used to disconnect or otherwise isolate the respective batteries, substantially simultaneously, from an external circuit in response to certain fault or non-fault battery conditions. When the plurality of controllable switches are synchronously transitioned from a closed or 'ON' state to an opened or 'OFF' state, the voltages of the respective batteries become distributed among the controllable switches, allowing for the use of switches having a reduced voltage rating as well as a reduced cost. By connecting a balancing resistor across each of a plurality of series-connected battery/switch pairs, a more even distribution of the voltages of the respective batteries among the controllable switches can be achieved, providing the system with more predictable operation.

Control method for disconnecting switches integrated in series-connected batteries

A method of controlling current in a parallel battery systems includes providing at least two parallel connected batteries, each said battery having an internal resistance and dissipating heat while operating; during operation, measuring at least the temperature and current of each individual battery; and providing instructions to a temperature control system having a temperature control module coupled with each said battery for individually cooling each said battery to adjust temperature of at least one battery in order to maintain the current at a target value.

Temperature controlled parallel balancing

The disclosed system includes a metering device for monitoring electrical power grid conditions, a controller for determining if the metering device is detecting a condition on an electrical grid that is indicative of a delayed voltage recovery event, and a communication device for communicating with one or more remotely located bi-directional power source modules connected to the electrical power grid, wherein the controller is programmed to send a notification via the communication device to the one or more remotely located bi-directional power source modules if the controller detects a condition indicative of delayed voltage recovery event. In some embodiments, the metering device includes a grid metering device. In some embodiments, the metering device measures power factor, and a change in the voltage and ratio of VARs to Watts.

Energy storage based countermeasure for a delayed voltage recovery

A battery system comprises a first battery unit; a DC voltage bus; a second battery unit electrically connected to the DC voltage bus; a current-limiting component; and switching circuitry for connecting the first battery unit to the DC voltage bus, where the switching circuitry is configured to electrically connect the first battery unit to the DC voltage bus either directly or through a current-limiting component, depending on an operating parameter of the first battery unit.

Battery balancing system

A system for charging a battery includes a battery pack having at least two lithium ion cells. A controller detects a rate of change of voltage with respect to a state of charge (dV/dSOC) of the battery pack based on a calculated dV/dSOC that represents the battery pack as a whole, without calculating dV/dSOC individually on a cell-by-cell basis. Charging is terminated when dV/dSOC reaches a predetermined value.

Method for detecting cell state-of-charge and state-of-discharge divergence of a series string of batteries or capacitors

One aspect relates to a communication protocol for communicating between one or more entities, such as devices, hosts or any other system capable of communicating over a network. A protocol is provided that allows communication between entities without a priori knowledge of the communication protocol. In such a protocol, for example, information describing a data structure of the communication protocol is transferred between communicating entities. Further, an authentication protocol is provided for providing bidirectional authentication between communicating entities. In one specific example, the entities include a master device and a slave device coupled by a serial link. In another specific example, the communication protocol may be used for performing unbalanced transmission between communicating entities.

Communication protocol

A compact, robust, multifunctional and highly manufacturable rechargeable cylindrical electrochemical cell is provided. In some embodiments, a cell can include a spirally wound assembly having an anode sheet and a cathode sheet separated by separator membranes, each sheet having a electroactive layer on a current collector. At least one of the current collectors can be in electrical communication with conducting tabs that extend from at least one of the anode sheet and the cathode sheet, the conducting tabs extends from an end face of the spirally wound assembly. The centers of the plurality of conducting tabs can be located within a 90 degree quadrant of an end face of the spirally wound assembly.

Battery tab location design and method of construction

An energy delivery system includes at least one string of two or more energy delivery modules electrically coupled in series. Each energy delivery module includes one or more energy delivery devices for storing and delivering electrical current, and a module monitor for monitoring and controlling each of the energy delivery devices. Each string of energy delivery modules includes a string communication path accessible to each of the energy delivery modules, wherein the module monitor of each energy delivery module is operable to communicate information associated with its energy delivery module through the string communication path. Each string also includes a string manager device for communicating with each module monitor in the string, through the string communication path. The energy delivery system also includes a system controller for communicating with each string manager device through a system communication path.

Multi-configurable, scalable, redundant battery module with multiple fault tolerance

A method of charging a NiMH or NiCd battery such that charging does not occupy a substantial amount of time and such that the operating temperature of the battery is reduced during the lifetime of the battery, thereby extending the life of the battery. This invention is a method of charging that is accomplished using a temperature differential method to continuously regulate the rate of charge injected into the battery. An amplifier is used to amplify the difference in temperature between one or more cases in which the battery is contained and ambient temperature. In this method, the greater the difference in temperature, the lower the charging current is injected into the battery. The method of charging may be incorporated into uninterruptible power supply equipment.

Method and system for charging a NiMH or NiCd battery

Controlling re-charge of a nickel metal-hydride (NiMH) or nickel cadmuim (NiCd) battery

A system for controlling multiple energy storage devices in an uninterruptible power supply (UPS) system is provided. In one embodiment of the invention, the system generally includes a charger coupled to a direct current (DC) bus of the UPS system, and two or more energy storage circuits, each of which includes a power regulator coupled to the charger and coupled to the DC bus, at least one energy storage device coupled to the power regulator, and a processor coupled to the power regulator for controlling the charge and discharge of the at least one energy storage device. In another embodiment of the invention, digital communication between two or more controllers is accomplished over the DC bus through use of the Control Area Network (CAN) protocol.

Growing community of inventors

Boxborough, MA, United States of America

C Michael Hoff