# US 2017/0288286 A1 · Liquid temperature regulated battery pack for electric vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288286 A1 - Document ID: US20170288286A1 - Status: Published application - Kind: A1 - Application number: 15/261,434 - Filed: 2016-09-09 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Assignees: Faraday & Future Inc. - Applicants: Faraday&Future Inc. - Inventors: Kameron Fraige Saad Buckhout; John Henry Harris, III - Web page: https://patentgrep.com/patent/US20170288286A1 ## CPC - H01M 10/613: Cooling or keeping cold - H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) - H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) - H01M 50/224: Metals - H01M 50/227: Organic material - H01M 50/231: having a layered structure - H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) - H01M 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB] - H01M 50/519: comprising printed circuit boards [PCB] - H01M 50/548: on opposite sides of the cell - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Systems and methods for liquid temperature regulated energy storage for electric vehicles are disclosed. Systems can include a tray configured to receive a plurality of battery housings and having a bottom surface for supporting the plurality of battery housings from below. A liquid path can be spaced away from the bottom surface and above the battery housings when the housings are inserted into the tray. The liquid path can have an inlet flow path with a plurality of outlets coupleable to an inlet in at least one flow path in the plurality of battery housings and an outlet flow path with a plurality of inlets coupleable to an outlet in the at least one flow path in the plurality of battery housings. A circuit can be configured to provide a voltage difference between the tray and a positive terminal. ## Claims ### Claim 1 A modular low voltage battery pack for a vehicle comprising: a tray configured to receive a plurality of battery housings, the tray having a bottom surface for supporting the plurality of battery housings from below; a liquid path spaced away from the bottom surface and above the battery housings when the housings are inserted into the tray, the liquid path having an inlet flow path with a plurality of outlets coupleable to an inlet in at least one flow path in the plurality of battery housings and an outlet flow path with a plurality of inlets coupleable to an outlet in the at least one flow path in the plurality of battery housings; and a circuit configured to provide a voltage difference between the tray and a positive terminal. ### Claim 2 (depends on 1) The battery pack of claim 1, wherein the tray comprises a plurality of receiving spaces separated by upwardly extending walls, each receiving space configured to receive one or more battery housings. ### Claim 3 (depends on 1) The battery pack of claim 1, wherein the liquid path comprises a substantially straight conduit extending from the inlet flow path and terminating at a distalmost outlet coupleable to a distalmost inlet in at least one flow path in the plurality of battery housings. ### Claim 4 (depends on 1) The battery pack of claim 1, wherein the liquid path comprises a substantially straight conduit extending from the proximalmost inlet flow path and terminating at a proximalmost outlet coupleable to a proximalmost outlet in at least one flow path in the plurality of battery housings. ### Claim 5 (depends on 1) The battery pack of claim 1, wherein the circuit comprises a parallel bus bar configured to electrically connect at least two terminals on the top side of each of the battery housings. ### Claim 6 (depends on 1) The battery pack of claim 1, further comprising the plurality of battery housings disposed within the tray. ### Claim 7 (depends on 6) The battery pack of claim 6, wherein each battery housing of the plurality of battery housings comprises a common flow channel in thermal contact with non-electrically conductive portions of two sets of electrochemical cells. ### Claim 8 (depends on 7) The battery pack of claim 7, wherein the common flow channel extends in a direction that is normal to the bottom surface of the tray. ### Claim 9 (depends on 7) The battery pack of claim 7, wherein the electrochemical cells comprise cylindrical battery cells that are oriented normal to the flow channels within each battery housing. ### Claim 10 (depends on 7) The battery pack of claim 7, wherein the electrochemical cells in each housing are connected by two circuits on opposite sides of the flow channel, the circuits being positioned parallel to the flow channel. ### Claim 11 A method of adding a battery module to a modular low voltage battery pack of a vehicle, the method comprising: disconnecting a bus bar from a terminal post of a first battery module secured within a tray of the battery pack; uncoupling a coolant conduit from a coolant inlet of the first battery module; placing a second battery module into the tray; electrically connecting the bus bar to the terminal post of the first battery module and a terminal post of the second battery module; and coupling the coolant conduit to the coolant inlet of the first battery module and a coolant inlet of the second battery module, wherein adding the second battery module to the battery pack increases the energy storage capacity of the battery pack. ### Claim 12 (depends on 11) The method of claim 11, wherein first battery module and the second battery module are electrically connected in parallel. ### Claim 13 (depends on 11) The method of claim 11, wherein adding the second battery module to the battery pack does not increase the maximum open circuit voltage of the battery pack. ### Claim 14 (depends on 11) The method of claim 11, further comprising: placing a third battery module into the tray; securing the third battery module to the tray; electrically connecting the bus bar to the terminal post of the third battery module; and coupling the coolant conduit to the coolant inlet of the third battery module. ### Claim 15 A modular low voltage battery pack for a vehicle comprising: at least one battery module having a positive terminal post, a coolant inlet, and a coolant outlet; circuitry configured to electrically connect the positive terminal post to a low voltage vehicle load; a cooling system configured to supply coolant to the at least one battery module at the coolant inlet and receive coolant from the at least one battery module at the coolant outlet, the cooling system comprising at least one conduit; and a tray secured to and at least partially surrounding the at least one battery module; wherein the tray is configured to receive at least one additional battery module to increase the energy storage capacity of the battery pack. ### Claim 16 (depends on 15) The battery pack of claim 15, wherein the circuitry comprises a conductive metallic bus bar configured to be removably electrically connected to one or more positive terminal posts. ### Claim 17 (depends on 16) The battery pack of claim 16, wherein the bus bar comprises a plurality of apertures, each aperture sized and shaped to receive the positive terminal post of a battery module. ### Claim 18 (depends on 15) The battery pack of claim 15, wherein each battery module further comprises a negative terminal post, at least a portion of the tray comprises an electrically conductive metal, and the negative terminal post of each of the plurality of battery modules is electrically connected to the electrically conductive metal. ### Claim 19 (depends on 15) The battery pack of claim 15, wherein the cooling system is configured to supply coolant to the at least one additional battery module at a coolant inlet and receive coolant from the at least one additional battery module at a coolant outlet. ### Claim 20 (depends on 19) The battery pack of claim 19, wherein the cooling system comprises: a coolant supply conduit having a plurality of fluid supply connectors, each fluid supply connector configured to be removably connected to a coolant inlet; and a coolant return conduit having a plurality of fluid return connectors, each fluid return connector configured to be removably connected to a coolant outlet; wherein each fluid supply connector is configured to prevent coolant from flowing out of the coolant supply conduit while not connected to a coolant inlet, and wherein each fluid return connector is configured to prevent coolant from flowing out of the coolant return conduit while not connected to a coolant outlet.