The cells provided an engineering challenge because each has a relatively low capacity, so thousands needed to be bundled together in a battery pack. Electrical and thermal management also proved to be a challenge, requiring liquid cooling and an intumescent fire prevention chemical.
The cells offered significant technical hurdles because of their modest energy storage capabilities, so they had to be grouped together in substantial quantities within a battery pack. Managing the electrical and thermal aspects also proved to be a complex task, necessitating the use of liquid cooling and an intumescent fire prevention chemical.