# US 9,437,853 B2 · Apparatus for preventing deformation of plastic battery pack case for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,853 B2 - Document ID: US9437853B2 - Status: Granted - Kind: B2 - Application number: 14/689,741 - Filed: 2015-04-17 - Published: 2015-08-13 - Granted: 2016-09-06 - Earliest claimed: 2011-09-07 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Hyun Min Kang; Chi Hoon Choi; Cheol Choi; Tae Min Park; Myeong Gi Kim; Soo Kil Shim - Web page: https://patentgrep.com/patent/US9437853B2 ## CPC - B60K 1/04: of the electric storage means for propulsion - B60L 50/64: Constructional details of batteries specially adapted for electric vehicles - B60L 58/26: by cooling - H01M 50/227: Organic material - H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) - H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543) - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y10T 29/49826: Assembling or joining - 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 - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed is an apparatus and method for preventing deformation of a plastic battery pack case for a vehicle, in which the side of the battery pack case is subjected to reverse deformation to absorb the deformation occurring after compression molding and to ensure the dimensions of a mounting portion of various components including battery packs, thereby ensuring an internal space of the battery pack case. To this end, the present invention provides an apparatus for preventing deformation of a plastic battery pack case for a vehicle, the apparatus including: a base having a case insertion space; a fixing portion for fixing a battery pack case inserted into the case insertion space; and a deformation producing portion inserted into the battery pack case and preventing the case from being deformed by pressing the inside of the case to be reversely deformed in the lateral direction. ## Claims ### Claim 1 A method for preventing deformation of a battery pack case for a vehicle, the apparatus comprising: inserting the battery pack case into a case insertion space of a base so that a mounting portion of the battery pack case is received on a support and fixed by a fixing portion; pushing an operating lever of the fixing portion up toward the inside of the battery pack case; in response to pushing the operating lever, transferring, by an arm portion, the rotational force of the operating lever into a pressing force, wherein a pressing portion connected to the front end of the arm portion presses a top of the mounting portion of the battery pack case via the pressing force to fix the mounting portion of the battery pack case; and pulling down a support frame so that a pre-strain applying block and a driving portion are inserted into the battery pack case, and the pre-strain applying block is moved toward the outside of the battery pack case by the driving portion to apply pre-strain to the battery pack case and ensure that a suitable internal space in the battery pack casing is provided. ### Claim 2 (depends on 1) The method of claim 1, wherein when the fixing portion fixes the battery pack case, the pressing portion is slidably inserted into a front end of the arm portion toward the outside of the battery pack case. ### Claim 3 (depends on 1) The method of claim 1 further comprising rotating a ratchet handle located on each of four inner sides of the battery pack case to apply the pre-strain to the battery pack case. ### Claim 4 (depends on 3) The method of claim 3 wherein a rotating portion is formed at a bottom of the ratchet handle and rotates in the same direction as the ratchet handle, wherein a rotational force of the rotating portion is transferred into a linear motion by a bolt portion engaged with the rotating portion to transfer the pressing force of the bolt portion to the pre-strain applying block. ### Claim 5 (depends on 4) The method of claim 4, further comprising pressing by the pre-strain applying block the mounting portion located on the inside of the battery pack case toward the outside of the battery pack case so that the battery pack case is pre-strained to prevent the battery pack case from being deformed by contraction and ensuring that a suitable internal space is created in the battery pack case. ### Claim 6 (depends on 1) The method of claim 1 further comprising rapidly cooling the bottom and sides of the battery pack case while applying pre-strain. ### Claim 7 (depends on 1) The method of claim 1 wherein the battery pack case is made by compression molding. ### Claim 8 (depends on 1) The method of claim 1 wherein the battery pack case is made of plastic. ### Claim 9 (depends on 1) The method of claim 1 wherein the battery pack case is installed in an electric vehicle.