Tech Briefs Magazine - February 2022 - BT-18

Safer Batteries
Cycle Life@25°C
Cycle Life@45°C
100
90
80
80
80
60
70
60
0 1000
2000
3000 4000 5000
Cycle No.
BYD Blade battery cycle life - capacity recovery rate when charging or driving, at various temperatures. (Photo: BYD)
From top to bottom, there is a layer
off cotton thermal insulation. Then
there is the thermal management, usually
liquid cooling. BYD uses a special
thermally conductive adhesive between
the cooling system and the cell stack.
The third layer from the top is the cell
stack. Protective plates are integrated
with the battery's aluminum housing.
" It's a robust design; a lot of cross bars,
bus bars. The BDU and BMS [battery disconnect
unit and battery management
system] are included; we do the integration, "
he said.
BYD uses the Blade battery in its Tang
electric SUV and in its Han EV sedan,
among other vehicles. During development,
the Blade battery was subjected to
a new series of stringent tests, Chen said.
Neither a 300 °C furnace test or a 260
percent overcharging test resulted in any
indication of fire or explosion. During a
nail-penetration ballistics test, the Blade
battery's surface temperature remained
with a 30 °C to 60 °C range without any
smoke or fire. And the battery successfully
sustained repeated 80-Hz vibration
attenuation, Chen said.
According to BYD, the Blade battery
exceeds 1.2 million km after 3,000 charge/
discharge cycles. The new Tang SUV delivers
a range of 505 km (NEDC; 313 mi.) on
a single charge, BYD claims, with 0-100
km/h acceleration of 4.6-seconds.
Tang's battery has demonstrated a
recharge capability from 30 percent to 80
percent of full SOC in 30 minutes, on 110kW
DC.
BYD integrates the Blade battery's BDU
and BMS into the pack. (Photo: BYD)
18
BYD has eight manufacturing locations
across China that are either already or
will be available to produce the Blade
battery, with a current production capacity
of about 70 GWh, he added. Beyond
mobility applications, Chen believes the
Blade battery has " significant market
potential " in energy storage and various
infrastructure/grid applications, such as
solar and wind buffers.
      
 Automotive Engineering
 Autonomous Vehicle Engineering 
     

Battery & Electrification Technology, February 2022
60
500
1000
Cycle No.
1500 2000
500
1000
Cycle No.
1500 2000
100
100
Cycle Life@60°C
capacity retention/%
capacity retention/%
capacity retention/%
http://info.hotims.com/82318-422 http://info.hotims.com/82318-801

Tech Briefs Magazine - February 2022

Table of Contents for the Digital Edition of Tech Briefs Magazine - February 2022

Tech Briefs Magazine - February 2022 - 1
Tech Briefs Magazine - February 2022 - Sponsor
Tech Briefs Magazine - February 2022 - Cov1
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