| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a heater unit, a heater unit system and a battery pack using them, capable of suppressing breakage of a heat generation source.SOLUTION: A heater unit includes: a substrate; a pattern which becomes a heat generation source provided on the substrate; and a first temperature sensing element inserted into the pattern. When temperature of the pattern is equal to or more than a temperature threshold, a resistance value of the first temperature sensing element increases along with temperature rise of the pattern.</p> |
