ESPEC Tech Information

Test Navi

No. 17NEW Product
Advanced Battery Chamber (ADBC-Next)
We are pleased to introduce the ADBC-Next Type with“technology for battery temperature uniformity”.
■Features of the ADBC-Next Type・Our unique “Multi Area Temperature Control” (patent pending) technology ensures superior temperature
uniformity and suppressed heat interference from heat generation among batteries. The technology
reduces the different volume of heat generation from individual batteries when using multiple batteries.
・Individual cell temperature controller can be built-in (optional: 6CH at maximum). It enables uniform celltemperature even when the charge-discharge rate and timing for starting test are different for eachbattery.

【 Multi Area Temperature
Control】
Sets up 6 outlets in thechamber and separately
controls temperature foreach outlet.

■Primary Specifications
Item
Casing dimensions (in mm)

Nominal Value
W：1000 × H：1980 × D：1245※Excluding protrusions

Temperature range-40℃ - +100℃

Number of areas for cell set up
Dimension of cell setup area (inmm)
Temperature uniformity
Safety device (standard feature)

6 areas
W：220 × H：130 × D：300±0.5℃
Sheathed heater
Screw-type door lockPressure relief vent
3-colored light tower

Remarks

Control range for specimen
temperature control(optional): -20℃ - 60℃

Can be customized for gas,smoke detector, fire
extinguisher, exhaust
damper, or otherrequirements.

ESPEC Tech Information

Test Navi

No. 17■ADBC-Next Type Performance Verification Case ①－Comparing battery surface temperature in non-energized state under
low temperature environment－【Purpose】

・Compare the conventional model and ADBC-Next type in batteries’ non-energized state for the temperature uniformity ofthe test area, and difference in surface temperature of individual batteries caused by air-circulation method.
・Set the test area temperature to a low temperature environment (-30℃) where temperature differences will be prominent.

【Test method】

・Set up 6 LiB (square type). Temperature control for conventional model and ADBC-Next type: Controls air temperature at theoutlet.
・After adequately stabilizing the temperature in the test area at -30℃, measures the surface temperature of the battery for onehour.
・Keep the battery in non-energized state, and measure the temperature at the bottom of the battery.

【Test results・Analysis】・Temperature difference between individual batteries was largely reduced from the conventional model (reduced toone-third).

Conventional Model (Outlet Control)

ADBC-Next Type (Outlet Control)ESPEC Tech Information

Test NaviNo. 17■ADBC-Next Type Performance Verification Case ②－Comparing battery surface temperature in energized state
under low temperature environment－【Purpose】
・Compare the conventional model and ADBC-Next type in batteries’ energized state for the difference in surface temperature of individualbatteries.
・Set the test area temperature to a low-temperature environment (-30℃) where temperature differences will be prominent.
【Test Method】
・Use 3 dummy batteries (aluminum block with sheet-type heater inside) to which heat value
can be specified in order to eliminate factors for heat value variations among the energized batteries.

＜Setting heat value for dummy battery＞
Repeat Steps 1-11 below 6 times.

・Control the temperature at the outlet both for the conventional model and ADBC-Next type.
・After stabilizing the temperature inside the test area at -30℃, induce the heat of dummy batteries
and measure the rise of battery temperature. Measure the temperature at the middle of the side surface.
【Data of dummy battery】
・Size:W40mm × H85mm × D152mm (assuming a square-type battery of about 5Ah)・Heat value : Set the heat value assuming high-rate pulse testing. (See the table on the right.)【Results・Analysis】
・Difference in temperature between individual energized batteries was significantly
reduced from conventional model (to one-seventh).
With the outlet on the top and inlet at the bottom surface, the conventional model employs the down-flow circulation method, generating heatinterference. ADBC-Next type horizontally circulates air (back⇒front), eliminating heat interference and achieves a uniform battery
temperature rising trend.
・Realizes uniform test conditions in output characteristic test and life cycle test, significantly improving the accuracy of testresults.

Conventional Model (Outlet Control)

ADBC-Next Type (Outlet Control)ESPEC Tech Information

Test NaviNo. 17■ADBC-Next Type Individual Cell Temperature Control Case

－Comparing battery surface temperature after charge-discharge（40A/1C）－【Purpose】
・Compare the change in battery surface temperature by charging-discharging a Lithium ion battery under the following 3 temperature control methods.
①ESPEC conventional model (Outlet air temperature control) ②ADBC-Next Type (Outlet air temperature control) ③ADBC-Next Type (Individual celltemperature control)【Test Method】
・Use 3 40Ah LiB batteries. After stabilizing the test area at 40℃, perform charge and discharge and measure the change in battery temperature (at themiddle of side surface).
【Battery and condition of charge/discharge】
・Battery (used battery)

Model: WB-LYP40AHA (Manufactured by Winston)・Charge-discharge conditions

Rated capacity: 40Ah

STEP1：CC Discharge (Initial discharge)

Terminate at 40A/3.0V

STEP2：CC-CV Discharge

Terminate at 40A/4.0V/0.2A

STEP3：CC Discharge

Terminate at 40A/3.0V【Test Result】
・Conventional model (Outlet control) : Temperature of battery rises after charge-discharge. Rise of the temperature was prominent for battery placedon the bottom shelf due to heat interference.
・ADBC-Next Type (Outlet control): Temperature rises after charge-discharge. Temperature rising trend was uniform as batteries are not affected byheat interference among batteries.

・ADBC-Next Type (Individual cell temperature control): Directly controls the cell temperature, absorbing heat generation of batteries fromcharge-discharge, and thus keeping the uniform temperature of the batteries.

Conventional Model (Outlet Control)

ADBC-Next Type (Outlet Control)

ADBC-Next Type (Individual Cell Temperature Control)