# US 12,214,672 B2 · Short circuit protection system for battery packs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,214,672 B2 - Document ID: US12214672B2 - Status: Granted - Kind: B2 - Application number: 18/019,246 - Filed: 2022-05-09 - Published: 2023-09-14 - Granted: 2025-02-04 - Earliest claimed: 2021-06-14 - Assignees: Istanbul Teknik Universitesi - Applicants: Istanbul Teknik Universitesi - Inventors: Murat Kubilay Ozguc; Derya Ahmet Kocabas - Web page: https://patentgrep.com/patent/US12214672B2 ## CPC - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - H02H 7/18: for batteries; for accumulators - B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) - 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 - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) ## Abstract A short circuit protection system for high voltage battery packs which is semiconductor based and provides protection with a faster response time, comprises a desaturation circuit comprising a resistor, a capacitor, and a diode, a MOSFET connected with the desaturation circuit, a driver for driving the MOSFET, a gate resistor with one end connected with the driver and another end connected with the MOSFET, a amplifier circuit configured to amplify the voltage signal passing through the gate resistor, a integral circuit connected with the output of the amplifier circuit and is configured to integrate the current measured from the gate resistor to find the load value of the gate resistor, a gate comparison circuit with one input connected with the gate resistor and another input connected with the integral circuit, a comparison circuit with one input connected with the desaturation circuit and another input connected with the gate comparison circuit. ## Claims ### Claim 1 A short circuit protection system preferably for high voltage battery packs which is semiconductor based and provides protection with a faster response time, comprising: at least one desaturation circuit comprising at least one resistor, at least one capacitor, and at least one diode, at least one MOSFET connected with the desaturation circuit, at least one driver for driving the MOSFET, at least one gate resistor, wherein one end of the at least one gate resistor is connected with the driver and the other end of the at least one gate resistor is connected with the MOSFET, at least one amplifier circuit configured to amplify the voltage signal passing through the gate resistor, at least one integral circuit connected with the output of the amplifier circuit and is configured to integrate the current measured from the gate resistor to find the load value of the gate resistor, at least one gate comparison circuit, wherein one input of the at least one gate comparison circuit is connected with the gate resistor for measuring the voltage passing through the gate resistor and the other input of the at least one gate comparison circuit is connected with the integral circuit for measuring the load on the gate resistor and comparing the voltage and load values, at least one comparison circuit, wherein one input of the at least one comparison circuit is connected with the desaturation circuit and the other input of the at least one comparison circuit is connected with the gate comparison circuit and is configured to compare error signals from the desaturation and gate comparison circuits and generate a result signal. ### Claim 2 (depends on 1) The short circuit protection system according to claim 1, wherein the at least one MOSFET is connected in reverse series. ### Claim 3 (depends on 2) The short circuit protection system according to claim 2, wherein the comparison circuit further comprises at least one logic gate. ### Claim 4 (depends on 2) The short circuit protection system according to claim 2, wherein the comparison circuit further comprises an AND logic gate. ### Claim 5 (depends on 1) The short circuit protection system according to claim 1, wherein the comparison circuit further comprises at least one logic gate. ### Claim 6 (depends on 5) The short circuit protection system according to claim 5, wherein the comparison circuit further comprises an AND logic gate. ### Claim 7 (depends on 1) The short circuit protection system according to claim 1, wherein the comparison circuit further comprises an AND logic gate.