# US 10,309,289 B2 · Heat storage system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,289 B2 - Document ID: US10309289B2 - Status: Granted - Kind: B2 - Application number: 15/611,078 - Filed: 2017-06-01 - Published: 2018-12-06 - Granted: 2019-06-04 - Earliest claimed: 2017-06-01 - Assignees: DENSO International America, Inc. - Applicants: DENSO International America, Inc. - Inventors: Adam Gilley - Web page: https://patentgrep.com/patent/US10309289B2 ## CPC - F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) - B60K 11/02: with liquid cooling - F01P 7/16: by thermostatic control - F01P 7/165: {characterised by systems with two or more loops} - F28D 20/023: {the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure} - F28D 20/025: {the latent heat storage material being in direct contact with a heat-exchange medium or with another heat storage material (F28D20/003 takes precedence)} - F01P 2007/146: {using valves} - F01P 2011/205: {using heat-accumulators} - F01P 2037/02: starting - F01P 2060/08: Cabin heater - F28D 2021/008: {for vehicles} - Y02E 60/14: Thermal energy storage - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A heat storage system including a heat storage device that stores heat and transfers heat to engine coolant passing through the heat storage device. A coolant flow control system directs coolant through the heat storage system. A control module configures the coolant flow control system to direct coolant to bypass the heat storage device such that the heat storage device does not heat the coolant when temperature of the engine is above the predetermined temperature. ## Claims ### Claim 1 A heat storage system comprising: a heat storage device that stores heat and transfers heat to engine coolant passing through the heat storage device; a heater core for heating a vehicle passenger cabin, the heater core is downstream of an engine and branches off from a direct connection line that is between the engine and a radiator, the direct connection line bypasses the heat storage device; a coolant flow control system, including the direct connection line, that directs coolant through the heat storage system, the heater core, the radiator, and the engine; and a control module that: configures the coolant flow control system to direct coolant to the heat storage device so the heat storage device heats the coolant, and direct the heated coolant to an engine to warm the engine when temperature of the engine is below a predetermined temperature; configures the coolant flow control system to direct coolant to bypass the heat storage device such that the heat storage device does not heat the coolant when temperature of the engine is above the predetermined temperature; and configures the coolant flow control system to direct coolant to the heater core from the heat storage device to heat the heater core. ### Claim 2 (depends on 1) The heat storage system of claim 1, wherein the control module configures the coolant flow control system to direct coolant to the heater core simultaneously from both the heat storage device and the engine. ### Claim 3 (depends on 1) The heat storage system of claim 1, wherein the control module configures the coolant flow control system to direct coolant to the heat storage device directly from the engine to heat the heat storage device. ### Claim 4 (depends on 1) The heat storage system of claim 1, wherein the coolant flow control system includes a plurality of valves controllable by the control module. ### Claim 5 (depends on 1) The heat storage system of claim 1, wherein the heat storage device includes a latent heat storage material encased within an outer shell, the latent heat storage material is configured to store heat. ### Claim 6 (depends on 5) The heat storage system of claim 5, wherein the latent heat storage material includes paraffin. ### Claim 7 (depends on 6) The heat storage system of claim 6, wherein the outer shell includes acrylic. ### Claim 8 (depends on 1) The heat storage system of claim 1, wherein the control module configures the coolant flow control system to direct coolant from the engine directly to the heater core such that the coolant bypasses the heat storage device after the heat storage device has reached a predetermined temperature. ### Claim 9 A heat storage system comprising: a heat storage device that stores heat and transfers heat to engine coolant passing through the heat storage device; a heater core; a radiator; and a coolant flow control system that directs coolant through the storage system, the coolant flow control system including a heat storage device bypass coolant flow path extending from an engine outlet coolant flow path that connects the engine directly to the heat storage device, both the heater core and the radiator are arranged along the heat storage device bypass coolant flow path; a control module that: configures the coolant flow control system to direct coolant across the heat storage device so the heat storage device heats the coolant, and direct the heated coolant to the engine to warm the engine when temperature of the engine is below a predetermined temperature; configures the coolant flow control system to direct coolant to flow from the radiator directly to the engine so that the coolant bypasses the heat storage device when temperature of the engine is above the predetermined temperature; and configures the coolant flow control system to direct coolant from the engine to the heat storage device directly to heat the heat storage device without the coolant passing through the radiator prior to reaching the heat storage device. ### Claim 10 (depends on 9) The heat storage system of claim 9, wherein the control module configures the coolant flow control system to direct coolant to the heater core directly from the heat storage device when the coolant is below a target temperature for cabin heating. ### Claim 11 (depends on 9) The heat storage system of claim 9, wherein when the heat storage device has reached a predetermined temperature, the control module configures the coolant flow control system to direct coolant from the engine to bypass the heat storage device such that coolant flowing from the engine flows to the radiator without flowing through the heat storage device. ### Claim 12 (depends on 9) The heat storage system of claim 9, wherein the coolant flow control system includes a plurality of valves controllable by the control module. ### Claim 13 (depends on 9) The heat storage system of claim 9, wherein the heat storage device includes a latent heat storage material encased within an outer shell, the latent heat storage material is configured to store heat. ### Claim 14 (depends on 13) The heat storage system of claim 13, wherein the latent heat storage material includes paraffin. ### Claim 15 (depends on 14) The heat storage system of claim 14, wherein the outer shell includes acrylic. ### Claim 16 A heat storage system comprising: a heat storage device that stores heat and transfers heat to, or absorbs heat from, engine coolant passing through the heat storage device; a radiator; and a coolant flow control system including: an engine outlet coolant flow path connecting an engine directly to the heat storage device to direct coolant from the engine directly to the heat storage device; an engine inlet coolant flow path connecting the heat storage device directly to the engine to direct coolant from the heat storage device directly to the engine; a heat storage device outlet coolant flow path connecting the heat storage device directly to the radiator to direct coolant from the heat storage device to the radiator; a heat storage device inlet coolant flow path connecting the radiator directly to the heat storage device to direct coolant from the radiator directly to the heat storage device without flowing through the engine; a first heat storage device bypass coolant flow path connecting the engine directly to the radiator to direct coolant from the engine to the radiator directly without coolant passing to the heat storage device; and a second heat storage device bypass coolant flow path connecting the radiator directly to the engine to direct coolant from the radiator to the engine without coolant passing to the heat storage device. ### Claim 17 (depends on 16) The heat storage system of claim 16, further comprising: a heater core; and a heater core coolant flow path that directs coolant to the heater core from at least one of the heater storage device and the engine. ### Claim 18 (depends on 16) The heat storage system of claim 16, wherein the coolant flow control system includes a plurality of valves controlled by a control module, the plurality of valves direct coolant flow through the heat storage system.