Key Features
Thermal conductivity for EV battery cells
LJIPL Mr.Bond® thermal pads offer good thermal conductivity, low thermal resistance. Being excellent insulation material, they are used between battery cells and casing, this allows for expansion and contraction of cells during charging and discharging. Additionally, it aids in securing the cells in position when vibrations occur. Our thermal pads are UL 94V0 approved, the highest rating for fire resistance, and we can offer thermal conductivity from 1 W/m·K to 8 W/m·K as per your specification.
Manufactured under an ISO 9001:2015-certified quality management system.
LJIPL Mr.Bond® Thermal Pads are soft, conformable pads used between battery cells and the casing to move heat out of the cells and into the structure. They offer good thermal conductivity with low thermal resistance while remaining an excellent insulation material, and they are UL 94V0 approved, the highest rating for fire resistance. Thermal conductivity can be supplied from 1 W/m·K to 8 W/m·K as per your specification, so the pad is matched to the heat load rather than bought off a single grade. Because the pad is compressible it allows for expansion and contraction of the cells during charging and discharging, and it aids in securing the cells in position when vibrations occur. Stocks are readily available in roll form, and sizes and thicknesses can be customised as per requirements. Manufactured by Lalit Jain Industries Pvt. Ltd. (LJIPL), ISO 9001:2015 certified and founded in 1987, at Rai, Sonipat (Haryana) and Bawana, Delhi NCR, India.
A thermal pad sits between the battery cells and the casing and gives heat a path out of the cells. Cells generate heat when they are charged and discharged, and a cell that cannot shed that heat ages faster than its neighbours, so the pad is doing reliability work as much as thermal work.
LJIPL Mr.Bond® thermal pads offer good thermal conductivity with low thermal resistance while being an excellent insulation material. That pairing is the point: the pad has to conduct heat while not conducting electricity.
It also has a mechanical job. Being compressible, it allows for expansion and contraction of cells during charging and discharging and aids in securing the cells in position when vibrations occur. The full group range of EV materials is listed at Lalit Jain Industries Pvt. Ltd. (LJIPL).
W/m·K, watts per metre kelvin, is the standard measure of how readily a material conducts heat. A higher figure means more heat moves through the same thickness of material for the same temperature difference across it.
We can offer thermal conductivity from 1 W/m·K to 8 W/m·K as per your specification. That range exists because packs differ: a pad that is more conductive than the design needs is not automatically the right answer, since conductivity, softness and thickness all trade against each other in a real assembly.
When you enquire, give the heat load, the gap to be filled and the conductivity your thermal model calls for, and the pad will be specified against it. If the number has simply been handed to you, our guide to what W/m·K means when you are specifying a thermal pad explains why thickness and contact pressure change the result as much as the conductivity does.
UL 94 is the standard classification for the flammability of plastic materials, and V0 is the highest of its vertical burn ratings. Our thermal pads are UL 94V0 approved, the highest rating for fire resistance.
On a material that sits inside a sealed battery enclosure in direct contact with cells, that rating is usually a requirement rather than a preference, and it is the first thing a pack designer checks on a datasheet. What the vertical burn test actually measures, and how V-0 differs from V-1 and V-2, is explained in what UL 94 V-0 means on a tape.
Stocks are readily available in roll form, and sizes and other thicknesses can be customised as per requirements, send your pad footprint, gap and conductivity requirement for a quote.
If you are still deciding what to specify, the thermal interface materials page lists what to measure first, and the EV battery tapes hub shows the materials that sit around the pad in the same pack.
Placed between the battery cells and the casing, the pad gives heat generated in the cells a route into the structure. Good thermal conductivity with low thermal resistance moves the heat; excellent insulation properties keep the electrical isolation intact at the same time.
Cells change dimension as they charge and discharge. The pad is compressible, so it allows for that expansion and contraction rather than resisting it, and keeps contact with both surfaces through the cycle instead of losing it at one extreme.
A pack in a vehicle vibrates continuously. The pad aids in securing the cells in position when vibrations occur, adding a mechanical function on top of the thermal one, and it is UL 94V0 approved for use in that enclosed environment.
They are used between the battery cells and the casing. They provide good thermal conductivity and low thermal resistance so heat leaves the cells, while remaining an excellent insulation material. They also allow for expansion and contraction of cells during charging and discharging, and aid in securing the cells when vibrations occur.
We can offer thermal conductivity from 1 W/m·K to 8 W/m·K as per your specification. W/m·K measures how readily a material conducts heat, and the range exists so the pad can be matched to the heat load and gap of your particular pack rather than supplied as a single grade.
Yes. They are UL 94V0 approved, which is the highest rating for fire resistance under the UL 94 flammability classification. For a material that sits inside a sealed enclosure in direct contact with cells, that rating is normally a design requirement.
Cells change dimension slightly as they charge and discharge. Because the pad is compressible it takes up that movement, allowing for expansion and contraction of cells rather than resisting it, and it keeps contact with both the cell and the casing throughout the cycle.
Readily available stocks are held in roll form, and sizes and other thicknesses can be customised as per requirements. Send the footprint, the gap you need to fill and the thermal conductivity your design calls for, and the pad will be specified and quoted against that requirement.
Lalit Jain Industries Pvt. Ltd. (LJIPL), founded in 1987 and ISO 9001:2015 certified, manufactures them in India at its units in Rai, Sonipat (Haryana) and Bawana, Delhi. The company is led by directors Mr. Prateek Jain and Mr. Shikhar Jain.
