Sodium battery Technical Analysis of Hina NaCR32140- ...

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Sodium battery cell with 10Ah, 3.0V from Hina

Rate discharge test

1. 0.5C constant current and constant voltage charging to 3.95V , different rates of discharge to 2.0V

Can meet 4C continuous discharge, capacity retention rate > 95% , single temperature rise < 20&#;

2. 0.5C constant current discharge to 2.0V , constant current charge at different rates to 3.95V

l It can meet 4C continuous charging, the capacity retention rate is > 92% ,and the unit temperature rise is < 15&#;

Pulse charging test

The battery adjusts SOC to 40% at normal temperature . After being left aside for 6 hours , it is charged at 10C for 60s or the voltage reaches 3.95V

Cell can support 10C pulse charging for 60s at 40% SOC at room temperature

Pulse discharge

The cell SOC set to 50% at room temperature , and then discharges it at 10C for 60s or the voltage reaches 2.0V after being left aside for 6 hours

Cell can support 10C pulse for 60s at 50% SOC at normal temperature.

Low temperature charging test

The battery is charged at a constant current of 0.2C to 3.90V at -10°C, then charged to the upper limit voltage at 0.1C , and fully discharged at 0.5C at a temperature of -10°C , for 10 cycles .

It can be continuously charged to 3.9V at 0.2C at -10&#;, and can be charged at 0.2C and discharged at -10 &#; at 0.5C. The available capacity is > 92%, and has no impact on the cycle after returning to normal temperature

Low temperature discharge capability

Charge to 3.95V at 0.5C constant current and constant voltage at 25°C then discharge to 2.0V at 0.5C after being left at different temperatures for 6 hours.

Capacity retention > 88% and energy retention > 80% at -20°C

Low temperature rate discharge capability

Charge to different SOC at 0.5C constant current and voltage at 25&#; , then discharge to 2.0V at 6C after leaving it for 6 hours at -18&#;.

At -18°C , SOC > 60% can achieve 6C continuous discharge.

Cycle life 2~3.95V 0.5C

Charge to 3.95V at 0.5C constant current and constant voltage at 25&#; ± 5&#; , discharge to 2.0V at 0.5C

Capacity Retention is 98% after 500 cycles .

Cycle life 2~3.95V 2C

Capacity Retention is 95% after 830 cycles .

Battery pack cycle life 0.5C/1C

Charge to 3.95V at 0.5C constant current and constant voltage at 25&#; ± 5&#; , discharge to 2.0V at 1C

The capacity retention rate of the battery pack after 370 cycles is > 96% .

Safety --- over discharge

At 1C constant current to 0V at 25&#; ± 5&#;, then fully discharge it to 0V. and then verify the capacity once

Initial Capacity, Over Discharge, 2nd Capacity, Over Discharge, 3rd Capapacity

Safety --- External short circuit

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Charge to 3.95V at 0.5C constant current and constant voltage at 25&#; ± 5&#; , and short circuit for 10min with an external circuit resistance of < 5mΩ .

The battery did not catch fire or explode and passed the test.

Safety --- impact of heavy objects

Charge to 3.95V at 0.5C constant current and constant voltage at 25&#; ± 5&#; , weight height 610mm, weight weight 9.1kg, 15.8mm steel rod

The battery has not caught fire, exploded or leaked, and has passed the test.

Safety --- low pressure test

Charge to 3.95V at 0.5C constant current and constant voltage at 25°C ± 5°C , and leave the battery under an absolute pressure of 11.6kPa for 6 hours at room temperature .

The battery did not catch fire or explode and passed the test.

Summary by Jerry Wan-Sodium Ion Battery :

1. This product has excellent rate performance, especially unique rate charging performance.
2. This product has excellent low temperature performance, especially it can support -40&#; discharge and -20&#; charging.
3. This product has the performance of not being afraid of over-discharge, which can reduce maintenance costs and improve product transportation safety in actual engineering applications.
4. This product has a high service life.
5. This product has strategic resource advantages and excellent cost performance.

Popular posts by Blice.Hu, welcome to Join Sodium battery group on Linkedin for upstream and downstream information and technical discussion

However, they will not be widely commercially available for a while. BMZ has got to the stage of testing prototype cells in and formats, with further formats in development. The company said cells are already being made for specific customers&#; projects, and capacity exists to deliver more should demand arise, but series production is not expected to begin until summer , or thereabouts.

CEO and founder Sven Bauer said the Na-ion technology: &#;offers us and our customers unique new opportunities as well as rapidly growing market potential, and we are looking forward to breaking new ground together&#;.

Sodium-ion has theoretical advantages that could make it complementary to lithium-ion in the battery market, if not a direct competitor.

The energy density of most types of lithium battery tends to be much higher than that of its newer counterparts, but on the flipside, sodium-ion batteries could be produced much more cheaply.

Meanwhile, a switch could enable a decoupling from the supply chains for lithium that are subject to huge volatility and fluctuations in demand, from sectors that include electric vehicles (EVs) and consumer electronics, as well as stationary battery storage.

There could also be a safety advantage, with the less reactive sodium cells not subject to dendrite formation that can cause lithium cells to short circuit, and ultimately to thermal runaway.

&#;The sodium-ion technology is the perfect solution for applications where energy density is not paramount,&#; BMZ Group CEO Bauer said.

&#;This includes industrial and home storage systems or industrial trucks, such as forklifts.&#;

Na-ion &#;expected to become popular choice&#; for developers

As part of our Year in Review articles, at the end of , and looking ahead into this year, Energy-Storage.news canvassed views from a number of developers of BESS projects on the technology trends they see coming up.

&#;Storage technologies are always evolving, so you should keep an eye out for the development of sodium-ion batteries, which can be one of the few technologies able to achieve a market share comparable to lithium batteries, in the short term,&#; said Julian Gerstner, head of energy storage at Baywa r.e.

Gerstner noted that sodium-ion battery development is largely in the R&D stage, but that the devices were expected to &#;become a popular choice for battery storage systems in the near future&#; (Premium access).

Interestingly, other respondents including Jeff Bishop, CEO of Key Capture Energy, said that newer tech like sodium-ion captures the imagination and media attention, but that advances in lithium-ion tech should not be ignored, because that is likely what will push the needle on stationary storage deployments.

In November last year, sodium-ion battery firm Altris, in partnership with European battery mass manufacturing startup Northvolt, claimed a &#;breakthrough&#; in creating Na-ion batteries with 160Wh/kg energy density.

Designed for stationary energy storage applications, the energy density of the pair&#;s battery tech compares favourably to the lower end of the 120 &#; 260Wh/kg range typically expected of Li-ion devices.

Price reporting agency (PRA) Fastmarkets recently wrote in a Guest Blog for this site that sodium-ion and solid-state batteries have an opportunity to gain market share amid the lithium supply crunch. In China, construction is reportedly underway on a 50MW/100MWh sodium-ion grid-scale battery storage system project, in the country&#;s Hubei province.

Again, with that being said, Li-ion doesn&#;t look likely to get knocked off its perch as the go-to technology, especially for longer range EVs or even BESS installations in more land-constrained areas.

BMZ&#;s Sven Bauer said the company, which makes and sells complete energy storage solutions in addition to cells, racks and modules, invests around half of its profits annually into R&D activities, but the enthusiasm it has towards the potential of sodium-ion &#; or other new technologies &#; &#;does not mean that we are abandoning any existing technologies&#;.

&#;As a pioneer in lithium-ion battery technology, we have made history in the world of batteries, and we continue to value their unrivaled energy density. Thanks to our many years of expertise, we are the industry experts who can give customers sound advice on which cell chemistry to use for any given application.&#;

BMZ&#;s Na-ion devices are being made by its specialist lithium-ion battery cell manufacturing subsidiary, TerraE.

If you want to learn more, please visit our website Sodium-Ion Battery Cells.