tender for supply, installation and commissioning of battery pack testing equipment at indian institute of technology dharwad; 1. battery pack capacity requirement a. voltage: 0 to 100 v b. current: 0 to 1200ah c. number of channels: 2 d. control mode: independent control (pulse and sim tests disabled when in parallel mode). e. channel feature: dual closed-loop control for constant current and constant voltage operation. 2. power supply requirements parameters: a. input power supply: ac 380v ±15%, 50/60hz ±5% b. power factor: ≥99% (full load) c. thdi: ≤5% (full load) d. input impedance: ≥1 mω e. input power: 280-300 kw; input current: 429 a/single f. overall system efficiency (max): 90- 95% g. noise level: ≤65 db h. power control module type: mosfet i. input power wiring: three-phase, five-wire system j. power input protection: anti-surge, anti-islanding, over/under-frequency, over/under-voltage, and open-phase protection. k. input power supply cable length to battery pack tester unit: minimum 3 meters. l. connector cable length from battery pack tester unit to cell clamp holder unit: minimum 5 meters. 3. functional and performance specifications a. voltage output range: charge 0–100v; discharge 3–100v (min. discharge voltage: 3v), accuracy: ±0.02% of fs; resolution: 24-bit. b. current output range: 60a / 120a / 240a / 1200a (selectable range), current accuracy: ±0.05% of fs; cv cut-off current: 100 ma; resolution: 24-bit c. single channel output power: 120 kw; total system output power: 240 kw d. current response time: ≤3 ms; conversion time: ≤6 ms; minimum step time: 0.1 s e. charge/discharge modes: ccc, cvc, cc-cvc, cpc, ccd, cvd, cc-cvd, cpd, crd. cut-off conditions: voltage, current, δtime, capacity, -δv f. simulation: charging/discharge with current and power mode,switching with programmable timestep control g. pulse step mode: charging/discharge with current and power, minimum pulse duration 50 ms, up to 32 pulse counts, voltage/δtime cut-off control. h. dcir measurement: supported via calculation. i. safety and protection features: 1.software protection: includes voltage, current and time limits, with data protection and offline mode. 2.hardware protection: anti-reverse connection, over-voltage, over-current, and over-temperature. 4. data management and communication a. step setting: configurable via form editing b. recording interval: minimum 10 ms (100 ms with aux) c. voltage interval: 200 mv; current interval: 100–200 ma depending on range d. recording frequency: 100 hz (10 hz with aux channel) e. database: mysql database; output formats: excel, txt or csv. f. curve templates: standard and customizable format. g. barcode scanning: supported for data traceability and management. h. communication protocol: tcp/ip over ethernet (1m bandwidth for lower computer; 10m–100m adaptive for host computer) i. networking: local area network via switch/router setup. j. optional communication: can, rs485 and bms communication (dbc configuration supported). 5. environmental and physical conditions a. operating temperature: -10°c to 40°c (accuracy drift <0.005% fs/°c within 25±5°c) b. storage temperature: -20°c to 50°c c. operating humidity: ≤70% rh (no condensation) d. storage humidity: ≤80% rh (no condensation) 6. additional requirement along with the battery pack tester 1. 100 quantity of 46800 nmc cells, nominal voltage: 3.7 v, capacity: 22 ah 2. 100 quantity of 18650 nmc cells, nominal voltage: 3.6 v, capacity: 3 ah 3. 100 quantity of 21700 nmc cells, nominal voltage: 3.6 v, capacity: 4.9 ah 4. lithium battery pack spot welding machine of capacity of 4kva.