The　thermal　control　and　heat　management　of　lithium-ion　(Li-ion)　batteries　in　high-power　applications　remains　a　challenge　to　be　addressed　before　widespread　commercialization.　To　solve　the　problem,　micro　heat　pipe　array　(MHPA)　is　used　to　design　Li-ion　battery　packs　cooling　system.　Experiments　were　conducted　utilizing　Li-ion　battery　packs　under　open　conditions　with　constant　current　of　18　A(1　C)　and　36　A(2　C).　The　temperatures　were　measured　with　and　without　micro　heat　pipe　arrays　during　the　charge-discharge　cycle.　At　the　rates　of　1　C　and　2　C,　the　temperature　results　of　the　Li-ion　battery　packs　validate　the　effectiveness　of　the　functional　heat　conducting　material-MHPA　in　lowering　the　temperature　of　the　battery　packs,　as　well　as　the　temperature　difference　inside　the　packs,　the　temperature　and　temperature　difference　could　be　controlled　within　40　and　5　respectively.　Thus,　they　preliminarily　solve　the　influence　of　temperature　on　battery　life　and　capacity.　Based　on　the　experimental　data,　the　heat　in　one　of　the　2　C　working　conditions　was　calculated,　and　the　convection　heat　dissipation　by　MHPA　reached　40%　of　the　heat　generation　in　the　pack.　©　All　right　reserved.