To　solve　the　heat　dissipation　problem　of　lithium-ion　power　battery　(battery　for　short),　a　new　honeycomb　type　liquid　cooling　module　was　developed　for　cylindrical　battery.　A　three-dimensional　thermal　model　was　established　based　on　the　finite　element　commercial　software　ANSYS　FLUENT.　The　heat　dissipation　effects　of　battery　module　were　analyzed,　and　the　model　was　validated　by　using　a　test　platform　by　simulations.　On　the　basis　of　this,　an　improved　liquid　cooling　structure　by　adding　the　deflector　was　proposed　and　the　three-dimensional　temperature　distribution　of　the　battery　module　under　different　coolant　temperatures　and　flow　rates　was　quantitatively　analyzed.　The　results　of　the　simulations　and　tests　illustrate　the　correctness　of　the　three-dimensional　model　of　the　battery　module　and　the　rationality　of　the　heat　dispersion　structure.　The　temperature　and　velocity　of　the　coolant　has　good　cooling　effects　on　the　temperature　and　distribution　of　the　battery　module,　and　should　be　controlled　reasonably.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.