Maxell PSB2032 is a rechargeable “all-solid-state” coin cell battery for industrial IoT devices, which more than quadruples the capacity of the earlier PSB401010H ceramic-packaged solid-state battery, increasing it from 8mAh to 35mAh.
As its name implies, it measures 20 mm in diameter and 3.2 mm in height, and delivers key benefits of solid-state batteries such as a wide discharge temperature range, high reliability, and high safety. It’s also easier to install than ceramic-packaged batteries requiring reflow soldering, since it comes pre-equipped with two connection terminals suitable for mounting into small-sized devices.
The company shared a comparison table between its two solid-state batteries.
| Items | PSB2032 (sample) | PSB401010H |
|---|---|---|
| Type | Coin type | Ceramic package type |
| Operating Temperature (℃) | Charge: -20 ∼ +115 Discharge: -50 ∼ +125 | Charge: -20 ∼ +115 Discharge: -50 ∼ +125 |
| Nominal Voltage (V) | 2.3 | 2.3 |
| Dimensions (mm) | Diameter 20.0 × Height 3.2 (Excluding connection terminals) | Length 10.5 × Width 10.5 × Height 4.0 |
| Nominal Capacity (mAh) | 35 | 8 |
| Implementation method | With connection terminals | Reflow mounting (Surface mounting) |
For reference, the capacity of a typical CR2032 battery is 220–240 mAh, so the PSB2032 has a much lower capacity. However, it can be recharged and works in demanding environments with a wide temperature range and high safety requirements.
The last time we wrote about solid-state batteries was in 2017, when we covered the TDK CeraCharge solid-state battery-in-a-chip and Prologium lithium ceramic batteries, highlighting key features of such batteries: no thermal runaway, no leakage, incombustible, resistance to compression, and no swelling. The main downside remains the relatively low capacity, although we’ve come a long way from the tiny 100 µAh capacity SMD batteries introduced in 2017.
The company also mentions combining the battery with wireless power transfer and energy harvesting technologies to lower maintenance costs in factories and infrastructure facilities, and “contribute to realizing a sustainable society”.
Maxell says samples of the PSB2032 all-solid-state coin cell battery will be available in late December. There may be additional details soon on the company’s solid-state batteries page, but right now, the PSB2032 is not listed, only smaller PSB920 models. More information may also be found in the press release.
Thanks to TLS for the tip.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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