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Misen
Standard Cells
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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Brand / Manufacturer | Misen | Model / Document | 21700A / Rev. A; new release recorded 2023-06-19; JP40 appears in the uploaded filename only |
| Cell Type | 21700 cylindrical rechargeable lithium-ion cell; IEC designation INR22/71 | Nominal Voltage / Energy | 3.7 V / Approx. 14.8 Wh, calculated using 4.0 Ah reference capacity |
| Minimum Standard Discharge Capacity* | 4000 mAh; 2 A CC-CV to 4.2 V / 80 mA termination, then 0.8 A discharge to 2.5 V; 25 ± 2°C | Minimum High-rate Discharge Capacity* | 3900 mAh; standard charge, then 40 A discharge to 2.5 V; 25 ± 2°C |
| Standard Charge / Discharge | Charge: 2 A CC-CV to 4.2 V / 80 mA termination; discharge: 0.8 A to 2.5 V | Rated Charge | 8 A (2C) CC-CV to 4.2 V / 200 mA termination; temperature schedule also applies |
| Maximum Continuous Discharge | 45 A (source: not triggering 80°C temperature cut); 60 A with 80°C temperature cut | Maximum Pulse Discharge | 140 A for 5 s at 25 ± 2°C; SOC, repetition and recovery not specified |
| Maximum Charging by Surface Temperature T | −10≤T<0°C: 0.4 A CC to 4.2 V, CV to 200 mA; 0≤T<10°C: 2 A, same endpoints; 10≤T<45°C: 8 A, same endpoints; 45≤T≤60°C: 8 A CC to 4.1 V | Operating Surface Temperature | Charge: −10 to 60°C; discharge: −30 to 75°C; recommended recharge release <45°C; re-discharge release must be <60°C |
| Initial AC Impedance* | ≤4 mΩ at 1 kHz, after charging to shipment voltage; general test temperature 25 ± 2°C | Maximum Dimensions / Weight | D × H: 21.31 × 70.42 mm, including sleeve / 70 g |
| Cycle Criterion — 30 A Discharge* | After 600 cycles: capacity ≥2400 mAh (60% of 4000 mAh reference) | Cycle Criterion — 40 A Discharge* | After 400 cycles: capacity ≥2400 mAh; if temperature >75°C, cool to 50°C then resume 40 A discharge to 2.5 V |
| Shared Cycle Test Conditions | 25 ± 2°C; rated 8 A CC-CV charge to 4.2 V / 200 mA termination; discharge to 2.5 V; rest ≥30 min after charge and ≥60 min after discharge | Fresh-cell Qualification (*) | Starred criteria apply only to unused cells within 30 days of manufacture; cycle tests begin with cells meeting this qualification |
| Storage Temperature / Duration | Shipment state: 0–60°C ≤1 month; 0–45°C ≤3 months; 0–25°C ≤12 months; humidity ≤75% RH | Shipping / Extended Storage Voltage | Shipping: 3.50–3.59 V; storage >3 months: maintain 3.50–3.95 V |
| Bottom Welding Restriction | Drawing prohibits tab welding within the central Ø6 mm area of the cell bottom | Charge / Discharge Endpoints | 4.2 V / 2.5 V; high-temperature charge schedule uses 4.1 V |
| Listed Charge Times | Standard: 140 min / 80 mA termination; rated: 40 min / 200 mA termination; 25 ± 2°C | Source Identity Status | Uploaded filename references JP40; the supplied document identifies 21700A throughout |
The supplied Ampace specification identifies a 21700A rechargeable lithium-ion cell with 3.7 V nominal voltage and at least 4000 mAh standard discharge capacity under defined fresh-cell conditions. It specifies separate continuous and five-second pulse discharge limits, plus temperature-dependent charging. MisenBattery supplies cells and supports custom pack evaluation using confirmed model identity, protection settings and application requirements. The uploaded filename references JP40, whose correspondence to 21700A requires confirmation.
Minimum standard discharge capacity is 4000 mAh after 2 A CC-CV charging to 4.2 V with 80 mA termination, then 0.8 A discharge to 2.5 V at 25 ± 2°C. A separate high-rate test requires at least 3900 mAh at 40 A. These starred criteria apply to unused cells within 30 days of manufacture.
The specification lists 45 A without triggering an 80°C temperature cut, and 60 A with an 80°C temperature cut. Section 4.17 separately gives a 75°C operating surface-temperature ceiling. Retain both statements and confirm their coordination with Ampace before setting pack limits, with independent temperature monitoring and application validation required for the finished battery pack.
Maximum pulse discharge is 140 A for five seconds at 25 ± 2°C. This defined duration supports evaluation of brief current demands. SOC, pulse repetition and recovery intervals are not supplied, so they require confirmation before repeated operation. Pack interconnects, sensing and protection should be validated against the intended pulse profile.
Maximum charging follows cell surface temperature: 0.4 A from −10°C to below 0°C, 2 A from 0°C to below 10°C, and 8 A from 10°C to below 45°C, each to 4.2 V with 200 mA termination. From 45°C to 60°C, the table specifies 8 A constant-current charging to 4.1 V.
Both cycle protocols use rated 8 A charging and require at least 2400 mAh after testing: 600 cycles at 30 A discharge, or 400 cycles at 40 A discharge. Testing uses 25 ± 2°C, 2.5 V discharge cut-off and specified rests. The 40 A protocol additionally requires cooling from above 75°C to 50°C before resuming.
Maximum sleeved dimensions are 21.31 mm diameter and 70.42 mm height, with a maximum weight of 70 g. Initial AC impedance is at most 4 mΩ at 1 kHz in shipment-voltage condition, subject to the fresh-cell qualification. The drawing prohibits bottom tab welding within the central Ø6 mm area, which must be respected during assembly.
Custom battery pack applications: MisenBattery supplies Ampace cells and supports custom pack evaluation for power tools and industrial equipment, subject to model confirmation and application validation. Integration requires a compatible BMS, fuse protection, voltage and temperature sensing, validated welding and interconnect processes, insulation, cell spacing and suitable thermal and mechanical design. Preserve the bottom Ø6 mm no-weld area. Confirm applicable CE, UN38.3, RoHS and UL documentation for the specific cell, pack and shipment; certification status is not established by the supplied specification alone.
