Abstract:
A lithium ion battery module 22 includes a housing 39 with dimensions that conform to overall dimensions for a standard lead acid battery. The lithium ion battery module 22 also includes a plurality of lithium ion battery cells 116 arranged in a stack within the housing 39 and a heat sink outer wall feature 60, 62 of the housing 39. The heat sink outer wall feature 60, 62 substantially extends in at least one direction to an outermost dimension of the standard lead acid battery.
Abstract:
In an embodiment, a system includes a battery module, a battery cell assembly that is a component of the battery module, and a battery cell of the battery cell assembly, wherein the battery cell is configured to generate heat during operation. The battery cell assembly also includes a phase change material (PCM) disposed along a thermal pathway within the battery cell assembly that transfers the heat generated by the battery cell away from the battery cell during operation. The PCM is configured to conduct a first portion of the heat generated by the battery cell during operation. Further, the PCM is configured to absorb a second portion of the heat generated by the battery cell to affect a phase change within at least a portion of the PCM.
Abstract:
An energy storage system (100) for supporting dual electrical functions of a vehicle (10) includes an energy storage unit (400) having a plurality of energy storage modules (478, 420, 424) connected in series, a plurality of sensing units for sensing state of charges of the plurality of energy storage modules, and a pair of primary voltage terminals (404, 405). The series connected plurality of energy storage modules (418, 420, 424) is connectable across the pair of primary voltage terminals (404, 405) during a key-on state of the vehicle (10) to supply energy storage power at a first voltage level to support primary electrical functions of the vehicle (10). The energy storage system (100) is further configured to select a subset of the plurality of energy storage modules (418, 420, 424) during a key-off state of the vehicle (10) to connect across a pair of secondary voltage terminals(415, 416) using a switch network (BMS 104) to supply energy storage power at a second voltage level.
Abstract:
Systems and methods for controlling multiple storage devices are provided. A system may include a first storage device and a second storage device, each adapted to store and release electrical energy. The system may also include a controller coupled to the first storage device, the second storage device, and a load. The controller is adapted to optimize operation of the system relative to a first system parameter by controlling the channeling of electric charge in a variable manner between the first storage device, the second storage device, and the load.
Abstract:
One embodiment of the present disclose describes systems and methods responsible for reducing errors in a battery model (42) used in the operation of a battery control system (14). The battery control system (14) may operate based on a modeled response of the battery derived from the battery model (42). If the battery model (42) is not calibrated/validated, errors in the battery model (42) may propagate through the modeled response of the battery to the operation of the battery control system (14). A calibration current pulse may result in a different measured response of the battery than the modeled response of the battery to the same calibration current pulse. A validation technique (80), which uses a difference between the modeled response and the measured response of the battery to the calibration current pulse (88) as a method to calibrate the battery model (42), may protect the battery control system (42) from the contribution of errors from an uncalibrated battery model.
Abstract:
A battery system may include multiple battery cells having different chemistries. To achieve certain performance goals, voltage parameters for the battery system, such as cruising voltages and maximum voltages can be adjusted. These adjustments may, for example, direct charging currents to a lithium-ion battery to increase fuel economy or may direct charging currents away from a lithium-ion battery to increase its longevity. Methods for matching batteries having different chemistries based on their open circuit voltages are also discussed.
Abstract:
A battery system includes a cell interconnect board (130) including a printed circuit board disposed proximate a power assembly having a plurality of pouch battery cells, including at least a first battery cell and a second battery cell in a stacked orientation relative to each other. The cell interconnect board (130) includes an interconnect (622) spanning a slot (134) in the cell interconnect board (130) and configured to receive a first tab electrode extending from the first battery cell and a second tab electrode extending from the second battery cell, such that the first and second tab electrodes are in contact with each other. The system also includes a sensor (132a, 132b) configured to measure a parameter associated with the power assembly.
Abstract:
A system includes a battery module having a heat sink outer wall feature and a plurality of battery cells. The battery module also includes a plurality of internal heat fins interleaved with the plurality of battery cells, wherein each of the plurality of internal heat fins is in thermal communication with at least one of the plurality of battery cells and in thermal communication with the heat sink outer wall feature. The battery module further includes a plurality of phase change material (PCM) layers interleaved with the plurality of battery cells, wherein each of the plurality of PCM layers is configured to be in thermal communication with at least one of the plurality of battery cells and in thermal communication with at least one of the plurality of internal heat fins.
Abstract:
Embodiments describe a battery system that includes a first battery module coupled to a regenerative braking system and a control module that controls operation of the battery system by: determining a predicted driving pattern over a prediction horizon using a driving pattern recognition model based in part on a battery current and a previous driving pattern; determining a predicted battery resistance of the first battery module over the prediction horizon using a recursive battery model based in part on the predicted driving pattern, the battery current, a present bus voltage, and a previous bus voltage; determining a target trajectory of a battery temperature of the first battery module over a control horizon using an objective function; and controlling magnitude and duration of electrical power supplied from the regenerative such that a predicted trajectory of the battery temperature is guided toward the target trajectory of the battery temperature during the control horizon.
Abstract:
A battery module including a first positive terminal, a second positive terminal, a ground terminal, a power conversion circuit, and a power assembly. The power assembly includes a plurality of battery cells coupled in series and disposed in a stacked orientation relative to each other and configured to output a first voltage between the first positive terminal and the ground terminal. The power conversion circuit is electrically coupled to the power assembly and configured to receive the first voltage as an input and to output a second voltage different from the first voltage. The second positive terminal is electrically coupled to the power conversion circuit to receive the second voltage from the power conversion circuit.