CN106159379A - The chiller of a kind of electrokinetic cell system heat pipe fin and mode selecting method - Google Patents

Abstract

The present invention relates to chiller and the mode selecting method of a kind of electrokinetic cell system heat pipe fin, including Battery case, some battery modules groups are set side by side in Battery case, battery modules flock mating closes and sets heat pipe heat, the both ends of heat pipe heat pass Battery case, and the both ends of heat pipe heat connect radiating fin；Mode selecting method includes the equivalent thermal resistance model setting up heat pipe heat and radiating fin, main heat-transfer path after setting up equivalent thermal resistance model is set up the 1D heat transfer model of lumped parameter, build the partial differential equation of the diabatic process of each element, after determining the convection transfer rate h required for system, select cooling scheme.The present invention can have the advantage that cooling effectiveness is high, system complexity is low and safety is high concurrently, and extensibility is strong simultaneously, and the type of cooling can adjust at random according to the actual demand of product, and standardization level is high；Easily realize the IP67 design of Battery case, save space and cost, improve the safety of electrokinetic cell system.

Description

The chiller of a kind of electrokinetic cell system heat pipe fin and mode selecting method

Technical field

The invention belongs to for directly changing the technical field that chemical energy is the method or apparatus of electric energy, such as set of cells, Particularly to a kind of radiating efficiency of electrokinetic cell system, improving radiating effect, different with different Pattern completions of improving The chiller of the electrokinetic cell system heat pipe fin of the heat dissipation problem of battery modules and mode selecting method.

Background technology

In recent years, the support of country and market favourable etc. under the conditions of, power lithium-ion battery industry development is the most fast Speed, its application has had spread over the fields such as electric bus, electric motor car, micro-public transport and energy storage.Along with lithium ion power electricity The large-scale application in pond, increasing problem highlights day by day, especially the heat dissipation problem of electrokinetic cell system.

The driving force of electric automobile during traveling derives from electrokinetic cell system, and electrokinetic cell system produces during charge/discharge Raw substantial amounts of heat can make battery temperature raise, and then makes the performance of electrokinetic cell system decline to a great extent.Research shows, works as lithium When the temperature of battery is more than 45 DEG C, its cycle life will decline to a great extent；Additionally, due to high temperature can make the side reaction of lithium ion battery Increase, for the purpose of protection battery, the charge/discharge power of battery can be limited.

The type of cooling of the prior art is substantially single natural cooling, air-cooled and liquid is cold.Conventional natural cooling side The efficiency comparison that electrokinetic cell system is cooled down by formula is low, it is difficult to satisfied cooling requirements in most cases, and cooling effectiveness ratio Cold etc. mode is relatively costly, system is complex and there is certain security risk for higher air blast cooling and liquid；Conventional Air blast cooling also exists that radiating efficiency is low, heat dissipation uniformity is poor and the problem such as air channel is complicated, additionally, current air blast cooling design It is difficult to meet the requirement of casing IP67 design；Conventional liquid cooling system is typically all and cold for liquid pipeline and liquid cooling plate is placed on battery Box house, such design not only makes whole liquid cooling system structure complicated, and coolant is introduced in Battery case, deposits Security risk in coolant leakage；Meanwhile, the type of cooling of the prior art is fixed, does not has autgmentability, for one Plant product and can only fix a kind of refrigerating mode of employing.

Summary of the invention

Present invention solves the technical problem that and be, in prior art, the type of cooling be substantially single natural cooling, air-cooled and Liquid is cold, and cannot taking into account cooling effectiveness, system complexity height and there is security risk of causing, meanwhile, of the prior art The type of cooling is fixed, does not has autgmentability, also exists and can only fix the problem using a kind of refrigerating mode for a kind of product, And then provide chiller and the mode selecting method of the electrokinetic cell system heat pipe fin of a kind of optimization.

The technical solution adopted in the present invention is, the chiller of a kind of electrokinetic cell system heat pipe fin, including electricity Pond casing, is provided with some battery modules groups side by side in described Battery case, described battery modules flock mating closes and is provided with heat pipe heat, described The both ends of heat pipe heat pass Battery case, and the both ends of described heat pipe heat connect radiating fin.

Preferably, described battery modules group includes the 2 row's battery modules being set up in parallel, and described heat pipe heat is located at 2 row's batteries Between module, between described heat pipe heat and any battery module, it is additionally provided with heat conduction glue-line.

Preferably, outside described radiating fin, cladding is provided with liquid cold runner shell, and described arbitrary liquid cold runner shell sets Having coolant inlet and cooling liquid outlet, the coolant inlet on described 2 liquid cold runner shells connects cooling by isocon Liquid input pipe, the cooling liquid outlet on described 2 liquid cold runner shells connects coolant outlet tube by collecting pipe.

Preferably, described coolant inlet and cooling liquid outlet are arranged at the leading section of liquid cold runner shell.

Preferably, outside described radiating fin, cladding is provided with air channel shell, and described arbitrary air channel shell is provided with cooling wind Entrance and cooling air outlet.

Preferably, described cooling air inlet is located at the front end of air channel shell, and described cooling air outlet is located at air channel shell Rear end.

Preferably, at described cooling air outlet, cooperation is provided with fan.

A kind of mode selecting method of the chiller of electrokinetic cell system heat pipe fin, described mode selecting method bag Include following steps:

Step 1.1: outside described electrokinetic cell system exists from battery, sequentially through heat-conducting silica gel sheet, battery modules The main heat-transfer path of shell, heat conduction glue-line, heat pipe heat and radiating fin；There is heat-transfer path, described heat-transfer path in described heat pipe heat Including first path, the second path, the 3rd path and the 4th path, described first path and the second paths in series, the described 3rd With described second paths in series behind path and the 4th path parallel connection, described first path is that heat is from heat conduction glue-line and heat pipe heat Contact surface is delivered to the path in heat pipe heat radial center face, and described second path is that heat is in heat pipe heat and radiating fin mosaic area Region beyond territory is along the path of heat pipe heat transfers, and described 3rd path is that heat is inlayed in heat pipe heat and radiating fin Region is delivered to the path of heat pipe heat and radiating fin contact surface from heat pipe heat along radial direction, and described 4th path is that heat is in warm Pipe group and radiating fin are inlayed region and are axially delivered to the path of heat pipe heat and radiating fin contact surface from heat pipe heat；Described First path, the second path, the 3rd path heat output corresponding with the 4th path is respectively q₁、q₂、q₃And q₄, q₁=q₂=q₃+ q₄；The temperature of heat-transfer path starting point is T₁, the temperature of heat-transfer path terminal is T₂；

Step 1.2: set up equivalent thermal resistance model, the heat output of the heat-transfer path of described equivalent thermal resistance model is q₅, q₁=q₂ =q₃+q₄=q₅, the origin temp of the heat-transfer path of described equivalent thermal resistance model is T₃, outlet temperature is T₄, T₁-T₂=T₃-T₄；

Step 1.3: before and after setting up equivalent thermal resistance model, the thermal resistance of heat pipe heat is equalSet up equivalence Thermal resistance before thermal resistance model is R_Pipe, setting up the thermal resistance after equivalent thermal resistance model isWherein, δ_Pipe For setting up the thickness of heat pipe heat, λ after equivalent thermal resistance model_PipeFor setting up the heat conductivity of heat pipe heat, S after equivalent thermal resistance model_Pipe For setting up the cross-sectional area of heat pipe heat after equivalent thermal resistance model, due to R_Pipe=R_Pipe-Model,

Step 1.4: described radiating fin exists heat-transfer path, described heat-transfer path includes the 5th path and the 6th path, Described 5th path is the path that heat is delivered to the fin end face of radiating fin from the substrate bottom surface of radiating fin, the described 6th Path is that heat is delivered to the path of substrate top surface from radiating fin substrate bottom surface；Set up the equivalent thermal resistance model of radiating fin, When by identical heat, the temperature difference setting up radiating fin before and after the equivalent thermal resistance model of radiating fin is equal, therefore foundation etc. Thermal resistance R of radiating fin before effect thermal resistance model_FinWith set up thermal resistance R of radiating fin after equivalent thermal resistance model_Fin-ModelIt is equal,Wherein, δ_FinFor set up radiating fin equivalent thermal resistance model after the thickness of radiating fin, λ_FinFor Set up the heat conductivity of radiating fin, S after the equivalent thermal resistance model of radiating fin_FinFor setting up the equivalent thermal resistance of radiating fin The cross-sectional area of radiating fin after model,

Step 1.5: the main heat-transfer path after the equivalent thermal resistance model described in establishment step 1.2 and step 1.3 is set up collection In parameterized 1D heat transfer model, the diabatic process of each element is described as with partial differential equation:

Cell heat transfer process:

Wherein, ρ_CellFor cell density, V_CellFor battery Volume, Cp_CellFor battery specific heat capacity, T_CellFor battery temperature,For the heating power of battery, λ_CellFor battery heat conductivity, L₁ Thickness for battery；

Heat-conducting silica gel sheet diabatic process:

Wherein, ρ_Glue1For leading Hot silica gel piece density, V_Glue1For heat-conducting silica gel sheet volume, Cp_Glue1For heat-conducting silica gel sheet specific heat capacity, T_Glue1For heat-conducting silica gel sheet temperature Degree, λ_Glue1For heat-conducting silica gel sheet heat conductivity, L₂Thickness for heat-conducting silica gel sheet；

Battery modules shell diabatic process:

Wherein, ρ_Plate For battery modules shell density, V_PlateFor battery modules enclosure volume, Cp_PlateFor battery modules shell specific heat capacity, T_PlateFor electricity Pond module shell temperature, λ_PlateFor battery modules shell heat conductivity, L₃Thickness for battery modules shell；

Heat conduction glue-line diabatic process:

Wherein, ρ_Glue2For Heat conduction glue-line density, V_Glue2For heat conduction glue-line volume, Cp_Glue2For heat conduction glue-line specific heat capacity, T_Glue2For heat conduction glue-line temperature, λ_Glue2For heat conduction glue-line heat conductivity, L₄Thickness for heat conduction glue-line；

Heat pipe heat diabatic process:

Wherein, ρ_PipeFor heat Pipe group density, V_PipeFor heat pipe heat volume, Cp_PipeFor heat pipe heat specific heat capacity, T_PipeFor heat pipe heat temperature, λ_PipeLead for heat pipe heat Hot coefficient, L₅Thickness for heat pipe heat；

Radiating fin diabatic process:

Wherein, ρ_FinClose for radiating fin Degree, V_FinFor radiating fin volume, Cp_FinFor radiating fin specific heat capacity, T_FinFor radiating fin temperature, h is convection transfer rate, A_FinThe area contacted with cooling working medium for radiating fin before setting up equivalent thermal resistance model, T_fFor cooling working medium temperature；

In above partial differential equation, t is the time, and A is cross-sectional area, and x is the coordinate on heat transfer direction；

Step 1.6: calculation procedure 1.5, solves different heat convection system with heating power, the cooling working medium temperature of battery The battery temperatures that number is corresponding, determine the convection transfer rate h required for system according to the restriction of battery maximum temperature；Work as h Select natural cooling scheme when=20～60w/m2-k, directly dispelled the heat by radiating fin, and radiating fin is deposited with surrounding air In relative motion；As h=20～100w/m2-k, select air blast cooling heat radiation, air channel shell is set outside radiating fin；Work as h When=500～15000w/m2-k, select liquid-cooling heat radiation, liquid cold runner shell is set outside radiating fin.

Preferably, in described step 1.3, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₁For the thermal resistance of first path, R₂It is the thermal resistance in the second path, R₃' it is the thermal resistance after the 3rd path and the 4th path parallel connection, the 3rd The thermal resistance in path is R₃It is R with the thermal resistance in the 4th path₄, thermal resistance after parallel connection d₁For the thickness of heat pipe heat, S₁For the gross contact area of heat pipe heat Yu heat conduction glue-line, S₂For the gross area of heat pipe heat cross section, S₃For heat pipe heat and radiating fin Gross contact area, l₂It is the length in the second path, l₃The degree of depth of radiating fin, λ is embedded for heat pipe heat_Pipe-rFor heat pipe heat radially Heat conductivity, λ_Pipe-aFor the heat conductivity that heat pipe heat is axial.

Preferably, in described step 1.4, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₅It is The thermal resistance in five paths, R₆It is the thermal resistance in the 6th path, Wherein, n is the number of radiating fin, l₄For the total height of radiating fin, l₅For the height of radiating fin substrate, S₄For radiating fin The cross-sectional area of plate base, S₅For total cross-sectional area of fin, λ_FinHeat conductivity for radiating fin.

The invention provides chiller and the mode selecting method of the electrokinetic cell system heat pipe fin of a kind of optimization, By being set up in parallel some battery modules groups in Battery case, it is equipped with heat pipe heat, heat pipe heat for each battery modules group Both ends through connecting radiating fin after Battery case, use heat pipe heat to set up heat transfer path at a high speed, can quickly, uniform The heat that battery produces is delivered to the outside of Battery case by ground；Battery produce heat be passed to Battery case outside it After, it is possible to use this heat is delivered in surrounding by natural wind, and radiating fin is exposed in atmosphere, and radiating fin is with electricity Electrical automobile moves, and has a relative motion with the air in surrounding, so enhances heat exchange, providing cost savings, energy consumption With improve radiating efficiency on the premise of space, it is also possible to assemble other mechanism, for the battery modules group of different quantities of heat production Adaptive air-cooled passage or the cold passage of liquid, can have the advantage that cooling effectiveness is high, system complexity is low and safety is high concurrently, simultaneously Extensibility is strong, and the type of cooling can adjust at random according to the actual demand of product, and standardization level is high；It is different from existing skill Art, cooling working medium does not enter inside Battery case, is easily done IP67 for air blast cooling, cold for liquid, is complete Avoid the coolant risk at Battery case internal leakage, easily realize Battery case IP67 design, save space with Cost, improves the safety of electrokinetic cell system.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiments of the invention 1；

Fig. 2 is the explosive view structural representation of embodiments of the invention 1；

Fig. 3 is the explosive view structural representation of embodiments of the invention 2；

Fig. 4 is the explosive view structural representation of embodiments of the invention 3；

Fig. 5 is the sectional view structural representation of the battery modules group of the present invention；

Fig. 6 is the structural representation of the radiating fin of the present invention.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to This.

As it can be seen, the present invention relates to the chiller of a kind of electrokinetic cell system heat pipe fin, including Battery case 1, it is provided with some battery modules groups 2 in described Battery case 1 side by side, described battery modules group 2 cooperation is provided with heat pipe heat 3, described The both ends of heat pipe heat 3 pass Battery case 1, and the both ends of described heat pipe heat 3 connect radiating fin 4.

In the present invention, in Battery case 1, it is set up in parallel some battery modules groups 2, coordinates for each battery modules group 2 and set Putting heat pipe heat 3, the both ends of heat pipe heat 3 connect radiating fin 4 after Battery case 1, use heat pipe heat 3 to set up biography at a high speed The passage of heat, rapidly and uniformly can be delivered to the outside of Battery case 1 by the heat of battery modules group 2.

In the present invention, it is contemplated that the reasonability that the heat transfer property of heat pipe excellence and structure are arranged, heat pipe heat 3 typically uses list Row's structure.

In the present invention, after the heat of battery modules group 2 is passed to the outside of Battery case 1, it is possible to use natural wind Being delivered in external environment condition by this heat, radiating fin 4 is exposed in atmosphere, when radiating fin 4 is with electric vehicle motion, Produce relative motion with surrounding air, both provided cost savings, energy consumption and space, enhance again heat exchange simultaneously, improve heat radiation speed Degree, it is also possible to assemble other mechanism, for the adaptive air-cooled passage of battery modules group 2 or the cold passage of liquid of different quantities of heat production.

The present invention has the advantage that cooling effectiveness is high, system complexity is low and safety is high concurrently, and extensibility is strong simultaneously, cold But mode can adjust at random according to the actual demand of product, and standardization level is high；Being different from prior art, cooling working medium does not enters Enter Battery case 1 internal, for air blast cooling, be easily done IP67, cold for liquid, it is to completely avoid coolant to exist The risk of Battery case 1 internal leakage, easily realizes the IP67 design of Battery case 1, saves space and cost.

In the present invention, when adopting the structure as embodiment 1, use heat pipe heat 3 at the battery mould within Battery case 1 Setting up the heat transfer path of a high speed between radiating fin 4 outside group 2 and Battery case 1, the heat produced by battery is fast It is delivered to the radiating fin 4 outside Battery case 1 up fastly, owing to the heat transfer resistance of heat pipe heat 3 is the least, radiating efficiency The highest, the heat radiation problem of non-uniform within Battery case 1 will be weakened, additionally, the heat of battery modules group 2 passes through heat pipe heat 3 are delivered to Battery case 1 outside, and the sealing of Battery case 1 is guaranteed, it is ensured that the IP67 design of Battery case 1.

In the present invention, it is exposed on the external naked for radiating fin 4 in air, when electric automobile travels with speed v, whole battery Casing 1 drives radiating fin 4 to move with speed v, and radiating fin 4 exists the relative speed that size is v with the air in external environment condition Degree, this relative velocity can strengthen the heat exchange between radiating fin 4 and air, improving heat exchanging efficiency.

Described battery modules group 2 includes the 2 row's battery modules 5 being set up in parallel, and described heat pipe heat 3 is located at 2 row's battery modules 5 Between, it is additionally provided with heat conduction glue-line 6 between described heat pipe heat 3 and any battery module 5.

In the present invention, battery modules group 2 includes the 2 row's battery modules 5 being set up in parallel, and heat pipe heat 3 is located at 2 row's batteries Between module 5, this makes each heat pipe heat 3 can cool down 2 row's battery modules 5 simultaneously, saves space and cost, is also easy to simultaneously Complete fixing relative to position between heat pipe heat 3 with radiating fin 4, it is ensured that radiating effect.

In the present invention, in order to reduce the thermal contact resistance on heat pipe heat 3 surface and 2 corresponding row's battery modules 5 surfaces further, Between 2 row's battery modules 5 and heat pipe heat 3, it is respectively provided with heat conduction glue-line 6, and ensures heat pipe heat 3 by certain pretightning force, lead Close contact between hot glue layer 6 and battery modules 5.

Outside described radiating fin 4, cladding is provided with liquid cold runner shell 7, and described arbitrary liquid cold runner shell 7 is provided with cold But liquid entrance 8 and cooling liquid outlet 9, the coolant inlet 8 on described 2 liquid cold runner shells 7 connects cold by isocon 10 But liquid input pipe 11, the cooling liquid outlet 9 on described 2 liquid cold runner shells 7 connects coolant outlet tube by collecting pipe 12 13。

Described coolant inlet 8 and cooling liquid outlet 9 are arranged at the leading section of liquid cold runner shell 7.

In the present invention, embodiment 2 arranges liquid cold runner shell 7 for cladding outside radiating fin 4, i.e. the enforcement of the present invention The natural air cooled pattern of example 1 can expand to the liquid chill formula of embodiment 2.

In the present invention, when adopting this kind of construction, arbitrary liquid cold runner shell 7 is provided with coolant inlet 8 and cooling Liquid outlet 9, coolant inlet 8 is used for importing coolant and carries out cooling operations, the cooling liquid outlet 9 cooling after deriving heat exchange Liquid.

In the present invention, the coolant inlet 8 on 2 liquid cold runner shells 7 is connected by isocon 10 has coolant to input Pipe 11, the cooling liquid outlet 9 on 2 liquid cold runner shells 7 connects coolant outlet tube 13, i.e. coolant by collecting pipe 12 and exists In one whole cooling procedure, sequentially flow through coolant inlet pipe 11, isocon 10, coolant inlet 8, radiating fin 4, coolant Outlet 9, collecting pipe 12 and coolant outlet tube 13.

In the present invention, Battery case 1 both sides are adjacent to a liquid cold runner shell 7 respectively, joint place gapless, battery case Body 1, radiating fin 4 and liquid cold runner shell 7 form two liquid cold runner, the two liquid cold runner only two openings respectively: Coolant enters liquid cooling system by coolant inlet pipe 11, flows into two liquid cold runner shells 7, coolant through isocon 10 Being taken away by heat on radiating fin 4 when flowing through liquid cold runner shell 7, coolant flows after circulating in liquid cold runner shell 7 Enter collecting pipe 12 and through coolant outlet tube 13 effluent cooling system.

In the present invention, such a construction ensures cooling operations consistent at heat pipe heat 3 both ends, both sides cooling will not be produced Inconsistent and affect the problem of the work of battery modules group 2, coolant may not flow into the inside of Battery case 1 simultaneously, it is ensured that Stablizing of Battery case 1 internal medium, it is to avoid the coolant risk in Battery case 1 internal leakage, it is ensured that battery modules The safety of group 2.

In the present invention, coolant inlet 8 and cooling liquid outlet 9 are arranged at the leading section of liquid cold runner shell 7, it is ensured that The convenience that coolant inlet pipe 11 and coolant outlet tube 13 are arranged, it is ensured that it is reasonable that pipeline is distributed.

Outside described radiating fin 4, cladding is provided with air channel shell 14, and described arbitrary air channel shell 14 is provided with cooling wind and enters Mouth 15 and cooling air outlet 16.

Described cooling air inlet 15 is located at the front end of air channel shell 14, and described cooling air outlet 16 is located at air channel shell 14 Rear end.

Coordinate at described cooling air outlet 16 and be provided with fan 17.

In the present invention, embodiment 3 arranges air channel shell 14 for cladding outside radiating fin 4, i.e. embodiments of the invention 1 Natural air cooled pattern can expand to the air blast cooling pattern of embodiment 3.

In the present invention, when adopting this kind of construction, arbitrary air channel shell 14 is provided with cooling air inlet 15 and cooling wind Outlet 16, cooling air inlet 15 is used for importing cold wind and carries out cooling operations, the cooling air outlet 16 wind after deriving heat exchange.

In the present invention, Battery case 1 both sides are adjacent to an air channel shell 14 respectively, joint place gapless, Battery case 1, radiating fin 4 and air channel shell 14 form two cooling air channels, and the two cooling air channel only has two openings respectively: cool down wind Entrance 15 and cooling air outlet 16, cooling wind flows into air channel shell 14 by cooling air inlet 15, and by cooling air outlet 16 Enter in environment.

In the present invention, in order to ensure farthest radiating fin 4 to be carried out air-cooled heat exchange, generally, cooling wind Entrance 15 is arranged on the front end of air channel shell 14, and cooling air outlet 16 is arranged on the rear end of air channel shell 14, it is ensured that cooling wind from The front end of air channel shell 14 flow to rear end, carries out comprehensive air-cooled heat exchange to radiating fin 4.

In the present invention, in order to ensure that cooling down wind can discharge after having carried out air-cooled heat exchange smoothly, therefore go out at cooling wind It has been equipped with fan 17, it is ensured that the efficiency of heat radiation at mouth 16.

A kind of mode selecting method of the chiller of electrokinetic cell system heat pipe fin, described mode selecting method bag Include following steps:

Step 1.1: outside described electrokinetic cell system exists from battery, sequentially through heat-conducting silica gel sheet, battery modules The main heat-transfer path of shell, heat conduction glue-line, heat pipe heat and radiating fin；There is heat-transfer path, described heat-transfer path in described heat pipe heat 3 Including first path, the second path, the 3rd path and the 4th path, described first path and the second paths in series, the described 3rd With described second paths in series behind path and the 4th path parallel connection, described first path is that heat is from heat conduction glue-line 6 and heat pipe heat 3 Contact surface be delivered to the path in heat pipe heat 3 radial center face, described second path is that heat is at heat pipe heat 3 and radiating fin 4 Inlaying the path along heat pipe heat 3 transfers, the region beyond region, described 3rd path is that heat is in heat pipe heat 3 and heat radiation Fin 4 is inlayed region and is delivered to the path of heat pipe heat 3 and radiating fin 4 contact surface, described 4th tunnel from heat pipe heat 3 along radial direction Footpath is heat inlays region in heat pipe heat 3 and radiating fin 4 and is axially delivered to heat pipe heat 3 and radiating fin 4 from heat pipe heat 3 The path of contact surface；Described first path, the second path, the 3rd path heat output corresponding with the 4th path is respectively q₁、q₂、 q₃And q₄, q₁=q₂=q₃+q₄；The temperature of heat-transfer path starting point is T₁, the temperature of heat-transfer path terminal is T₂；

Step 1.2: set up equivalent thermal resistance model, the heat output of the heat-transfer path of described equivalent thermal resistance model is q₅, q₁=q₂ =q₃+q₄=q₅, the origin temp of the heat-transfer path of described equivalent thermal resistance model is T₃, outlet temperature is T₄, T₁-T₂=T₃-T₄；

Step 1.3: before and after setting up equivalent thermal resistance model, the thermal resistance of heat pipe heat 3 is equalSet up equivalence Thermal resistance before thermal resistance model is R_Pipe, setting up the thermal resistance after equivalent thermal resistance model isWherein, δ_Pipe For setting up the thickness of heat pipe heat 3, λ after equivalent thermal resistance model_PipeFor setting up the heat conductivity of heat pipe heat 3 after equivalent thermal resistance model, S_PipeFor setting up the cross-sectional area of heat pipe heat 3 after equivalent thermal resistance model, due to R_Pipe=R_Pipe-Model,

Step 1.4: described radiating fin 4 exists heat-transfer path, described heat-transfer path includes the 5th path and the 6th path, Described 5th path is the path that heat is delivered to fin 19 end face of radiating fin 4 from substrate 18 bottom surface of radiating fin 4, institute Stating the 6th path is that heat is delivered to the path of substrate 18 end face from radiating fin 4 substrate 18 bottom surface；Set up radiating fin 4 etc. Effect thermal resistance model, when by identical heat, sets up the temperature difference of radiating fin 4 before and after the equivalent thermal resistance model of radiating fin 4 Equal, therefore thermal resistance R of radiating fin 4 before setting up equivalent thermal resistance model_FinWith set up the heat of radiating fin 4 after equivalent thermal resistance model Resistance R_Fin-ModelIt is equal,Wherein, δ_FinFor set up radiating fin 4 equivalent thermal resistance model after dispel the heat The thickness of fin 4, λ_FinFor set up radiating fin 4 equivalent thermal resistance model after the heat conductivity of radiating fin 4, S_FinFor setting up The cross-sectional area of radiating fin 4 after the equivalent thermal resistance model of radiating fin 4,

Step 1.5: the main heat-transfer path after the equivalent thermal resistance model described in establishment step 1.2 and step 1.3 is set up collection In parameterized 1D heat transfer model, the diabatic process of each element is described as with partial differential equation:

Cell heat transfer process:

Wherein, ρ_CellFor cell density, V_CellFor battery Volume, Cp_CellFor battery specific heat capacity, T_CellFor battery temperature,For the heating power of battery, λ_CellFor battery heat conductivity, L₁ Thickness for battery；

Heat-conducting silica gel sheet diabatic process:

Wherein, ρ_Glue1For leading Hot silica gel piece density, V_Glue1For heat-conducting silica gel sheet volume, Cp_Glue1For heat-conducting silica gel sheet specific heat capacity, T_Glue1For heat-conducting silica gel sheet temperature Degree, λ_Glue1For heat-conducting silica gel sheet heat conductivity, L₂Thickness for heat-conducting silica gel sheet；

Battery modules 5 shell diabatic process:

Wherein, ρ_Plate For battery modules 5 shell density, V_PlateFor battery modules 5 enclosure volume, Cp_PlateFor battery modules 5 shell specific heat capacity, T_Plate For battery modules 5 skin temperature, λ_PlateFor battery modules 5 shell heat conductivity, L₃Thickness for battery modules 5 shell；

Heat conduction glue-line 6 diabatic process:

Wherein, ρ_Glue2For Heat conduction glue-line 6 density, V_Glue2For heat conduction glue-line 6 volume, Cp_Glue2For heat conduction glue-line 6 specific heat capacity, T_Glue2For heat conduction glue-line 6 temperature Degree, λ_Glue2For heat conduction glue-line 6 heat conductivity, L₄Thickness for heat conduction glue-line 6；

Heat pipe heat 3 diabatic process:

Wherein, ρ_PipeFor heat Pipe group 3 density, V_PipeFor heat pipe heat 3 volume, Cp_PipeFor heat pipe heat 3 specific heat capacity, T_PipeFor heat pipe heat 3 temperature, λ_PipeFor heat pipe Organize 3 heat conductivitys, L₅Thickness for heat pipe heat 3；

Radiating fin 4 diabatic process:

Wherein, ρ_FinClose for radiating fin 4 Degree, V_FinFor radiating fin 4 volume, Cp_FinFor radiating fin 4 specific heat capacity, T_FinFor radiating fin 4 temperature, h is heat convection system Number, A_FinThe area contacted with cooling working medium for radiating fin 4 before setting up equivalent thermal resistance model, T_fFor cooling working medium temperature；

In above partial differential equation, t is the time, and A is cross-sectional area, and x is the coordinate on heat transfer direction.

Step 1.6: calculation procedure 1.5, solves different heat convection system with heating power, the cooling working medium temperature of battery The battery temperatures that number is corresponding, determine the convection transfer rate h required for system according to the restriction of battery maximum temperature；Work as h Select natural cooling scheme when=20～60w/m2-k, directly dispelled the heat by radiating fin 4, and radiating fin 4 and surrounding air There is relative motion；As h=20～100w/m2-k, select air blast cooling heat radiation, air channel shell is set outside radiating fin 4 14；As h=500～15000w/m2-k, select liquid-cooling heat radiation, liquid cold runner shell 7 is set outside radiating fin 4.

In described step 1.3, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₁It is The thermal resistance in one path, R₂It is the thermal resistance in the second path, R₃' it is the thermal resistance after the 3rd path and the 4th path parallel connection, the 3rd path Thermal resistance is R₃It is R with the thermal resistance in the 4th path₄, thermal resistance after parallel connection d₁Thickness for heat pipe heat 3 Degree, S₁For the gross contact area of heat pipe heat 3 with heat conduction glue-line 6, S₂For the gross area of heat pipe heat 3 cross section, S₃For heat pipe heat 3 with The gross contact area of radiating fin 4, l₂It is the length in the second path, l₃The degree of depth of radiating fin 4, λ is embedded for heat pipe heat 3_Pipe-r For heat pipe heat 3 heat conductivity radially, λ_Pipe-aFor the heat conductivity that heat pipe heat 3 is axial.

In described step 1.4, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₅It it is the 5th tunnel The thermal resistance in footpath, R₆It is the thermal resistance in the 6th path, Wherein, N is the number of radiating fin 4, l₄For the total height of radiating fin 4, l₅For the height of radiating fin 4 substrate 18, S₄For radiating fin The cross-sectional area of sheet 4 substrate 18, S₅For total cross-sectional area of fin 19, λ_FinHeat conductivity for radiating fin 4.

In the present invention, it is delivered in surrounding air be a more complicated process by the heat that battery produces, relates to Heat conduction, heat convection and the heat transfer problem of three kinds of forms of radiation heat transfer, dimension is also three-dimensional, due to the fortune of battery modules group 2 Trip temperature is not the highest, and radiation heat transfer can be ignored, and generally, only considers heat conduction and two kinds of heat exchange sides of heat convection Formula.

In the present invention, the internal 3D structure of battery system is the most complex, if analyzing the diabatic process of 3D, then heat management side The selection of case can become complicated and the time is the longest, for simplified model, quickly selects heat sink conception, can be by complicated 3D heat transfer Problem modelling becomes the 1D heat transfer problem of lumped parameter, then calculates the cooling working medium required for battery system heat radiation, and then Determine cooling scheme.

In the present invention, first should determine the main heat-transfer path of battery system.In the design of battery system heat management, often have Article one, main heat-transfer path, the heat major part that battery produces is delivered in surrounding air by this paths.Cold in selection But, during scheme, also it is to be analyzed for object with this paths, and then selects suitable cooling scheme.

In the present invention, main heat-transfer path is: the heat that battery produces is delivered to the heat-conducting silica gel sheet within battery modules 5 On, it is then passed on the shell of battery modules 5；Fill with heat conduction glue-line 6 between shell and the heat pipe heat 3 of battery modules 5, pass The heat being delivered on the shell of battery modules 5 is delivered in heat pipe heat 3 after heat conduction glue-line 6；Heat pipe heat 3 embeds radiating fin Sheet 4, the heat being delivered in heat pipe heat 3 is delivered on radiating fin 4 by the form of heat conduction, then by heat convection from dissipating Hot fin 4 distributes heat in environment.

In the present invention, after determining the main heat-transfer path of battery system, second step should the main heat-transfer path of modelling.This step Including two parts, the thermally conductive pathways of bending is become a straight heat-transfer path by thermal resistance model equivalence by the first, and it two is By thermal resistance model, baroque parts equivalence is become the entity of tactical rule.

In the present invention, the thermally conductive pathways of bending is become a straight heat-transfer path by thermal resistance model equivalence, typically wraps Having included the first path in step 1.1, the second path, the 3rd path and the 4th path, the heat output of this four paths is respectively q₁、q₂、q₃And q₄, the heat output of the heat-transfer path of equivalent thermal resistance model is q₅, q₁=q₂=q₃+q₄=q₅；It is also desirable to protect It is equal that card sets up the temperature difference of heat pipe heat 3 before and after equivalent thermal resistance model, and the temperature making heat-transfer path starting point is T₁, heat-transfer path terminal Temperature be T₂, the origin temp of the heat-transfer path of equivalent thermal resistance model is T₃, outlet temperature is T₄, then T₁-T₂=T₃-T₄；Only Guaranteed setting up before and after equivalent thermal resistance model that heat pipe heat 3 is by the case of identical heat, the temperature difference is equal, and guarantee sets up equivalence Heat pipe heat 3 before and after thermal resistance model is the most equivalent.

In the present invention, before and after setting up equivalent thermal resistance model, the thermal resistance of heat pipe heat 3 is equalTherefore The thermal resistance of heat pipe heat 3 before first equivalent thermal resistance model is set up in calculating.Before setting up equivalent thermal resistance model, heat pipe heat 3 is by four heat-transfer paths Composition, every paths has the thermal resistance of its own, can be according to Fourier Heat Conduction lawDerive the table of thermal resistance Reaching formula, wherein, q is the heat flow by heat-transfer path cross section, and λ is the heat conductivity of object, and A is the area of heat-transfer area, For the thermograde on heat conduction direction.

In the present invention, withThe process of derivation thermal resistance is:

Several with difference scheme approximation local derviation

According to resistance=voltage drop/electric current,According to thermal resistance=temperature fall/hot-fluid (by cutting in the unit interval The heat of face transmission), obtain thermal resistanceWherein, △ T is the temperature difference of heat-transfer path, and △ x is the length of heat-transfer path Degree.

In the present invention, in step 1.3, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₁ For the thermal resistance of first path, R₂It is the thermal resistance in the second path, R₃' it is the thermal resistance after the 3rd path and the 4th path parallel connection, the 3rd tunnel The thermal resistance in footpath is R₃It is R with the thermal resistance in the 4th path₄, thermal resistance after parallel connection d₁Thickness for heat pipe heat 3 Degree, S₁For the gross contact area of heat pipe heat 3 with heat conduction glue-line 6, S₂For the gross area of heat pipe heat 3 cross section, S₃For heat pipe heat 3 with The gross contact area of radiating fin 4, l₂It is the length in the second path, l₃The degree of depth of radiating fin 4, λ is embedded for heat pipe heat 3_Pipe-r For heat pipe heat 3 heat conductivity radially, λ_Pipe-aFor the heat conductivity that heat pipe heat 3 is axial.

In the present invention, it can thus be appreciated that before setting up equivalent thermal resistance model the thermal resistance of heat pipe heat 3 only with the hot physical property of heat pipe heat 3 and Size is relevant, therefore, in the case of heat pipe heat 3 and mounting means thereof determine, sets up the heat of heat pipe heat 3 before equivalent thermal resistance model Resistance determines that.

In the present invention, generally, byLearn, set up heat pipe after equivalent thermal resistance model The cross-sectional area of group 3 is determined by the size of battery, and thickness is determined by mass conservation law, by R_Pipe=R_Pipe-Model, determine and build The heat conductivity of heat pipe heat 3 after vertical equivalent thermal resistance modelSo far, the most successfully by the heat transfer of bending Path modelling becomes straight heat-transfer path.

In the present invention, after the heat-transfer path of bending is become straight heat-transfer path by equivalence, need to be with by thermal resistance model Baroque parts equivalence is become the entity of tactical rule, for battery, heat-conducting silica gel sheet, heat conduction glue-line 6 and battery mould The shell these four element of group 5, their profile comparison rule, it is not necessary to special handling；But for radiating fin 4, then Need its equivalence to be become the entity of rule by thermal resistance model.

In the present invention, before the equivalent thermal resistance model setting up radiating fin 4, radiating fin 4 on main heat transfer direction by two Bar heat-transfer path is in parallel, and these two articles of heat-transfer paths are the 5th path and the 6th path respectively, and wherein, the 5th path is that heat is from dissipating Substrate 18 bottom surface of hot fin 4 is delivered to the path of fin 19 end face of radiating fin 4, and the 6th path is that heat is from radiating fin 4 substrate 18 bottom surfaces are delivered to the path of substrate 18 end face；After setting up the equivalent thermal resistance model of radiating fin 4, radiating fin 4 becomes One regular shape.In order to ensure that setting up the radiating fin 4 before and after the equivalent thermal resistance model of radiating fin 4 has identical heat Mechanical characteristic, when by identical heat, sets up the temperature difference of radiating fin 4 before and after the equivalent thermal resistance model of radiating fin 4 equal, Difference scheme thus according to Fourier heat conduction lawThe equivalent thermal resistance setting up radiating fin 4 can be derived Before and after model, the thermal resistance of radiating fin 4 is equal, i.e. R_Fin=R_Fin-Model。

Heat in the present invention, before the equivalent thermal resistance model setting up radiating fin 4, on 4 two heat-transfer paths of radiating fin Resistance is respectivelyWithSet up radiating fin 4 before the equivalent thermal resistance model of radiating fin 4 Thermal resistance be formed in parallel by the two thermal resistance,Thus can obtain, set up the equivalent thermal resistance model of radiating fin 4 The thermal resistance of front radiating fin 4 is the most relevant with the hot physical property of radiating fin 4 and size, therefore, at the structure and material of radiating fin 4 After determining, before setting up the equivalent thermal resistance model of radiating fin 4, the thermal resistance of radiating fin 4 determines that；Setting up radiating fin 4 Equivalent thermal resistance model after, radiating fin 4 thermal resistance isGenerally, set up radiating fin 4 etc. After effect thermal resistance model, the cross-sectional area of radiating fin 4 is determined by the size of battery, and thickness is determined by mass conservation law, therefore Can determine that the heat conductivity of heat pipe heat 3 after the equivalent thermal resistance model setting up radiating fin 4So far, The most irregular element modelling is become the element of rule.

In the present invention, the 3rd step is that the 1D heat transfer model of lumped parameter is set up.When the thermal conduction resistance of solid interior is the least When the heat exchange thermal resistance on its surface, the temperature of any moment solid interior all reaches unanimity, so that it is believed that whole solid exists With being under same temperature in a flash.

In the present invention, by the foundation of the equivalent thermal resistance model of step 1.1～step 1.4, main heat-transfer path is curved by path Bent, the irregular characteristic of element is become, by equivalence, the characteristic that path is straight, element is regular, on this basis, with each element for joint Point, sets up the 1D heat transfer model of a lumped parameter to the main heat-transfer path after the foundation of equivalent thermal resistance model, each element Diabatic process describes by partial differential equation accordingly:

Cell heat transfer process:

${\mathrm{\ρ}}_{Cell}{V}_{Cell}{\mathrm{Cp}}_{Cell}\frac{\∂T_{Cell}}{\∂t}=\stackrel{\·}{q}+{\mathrm{\λ}}_{Cell}A\frac{\∂T_{Cell}}{\∂x}{|}_{x=L_1};$

Heat-conducting silica gel sheet diabatic process:

${\mathrm{\ρ}}_{Glue1}{V}_{Glue1}{\mathrm{Cp}}_{Glue1}\frac{\∂T_{Glue1}}{\∂t}=-{\mathrm{\λ}}_{Cell}A\frac{\∂T_{Cell}}{\∂x}{|}_{x=L_1}+{\mathrm{\λ}}_{Glue1}A\frac{\∂T_{Glue1}}{\∂x}{|}_{x=L_2};$

Battery modules 5 shell diabatic process:

${\mathrm{\ρ}}_{Plate}{V}_{Plate}{\mathrm{Cp}}_{Plate}\frac{\∂T_{Plate}}{\∂t}=-{\mathrm{\λ}}_{Glue1}A\frac{\∂T_{Glue1}}{\∂x}{|}_{x=L_2}+{\mathrm{\λ}}_{Plate}A\frac{\∂T_{Plate}}{\∂x}{|}_{x=L_3};$

Heat conduction glue-line 6 diabatic process:

${\mathrm{\ρ}}_{Glue2}{V}_{Glue2}{\mathrm{Cp}}_{Glue2}\frac{\∂T_{Glue2}}{\∂t}=-{\mathrm{\λ}}_{Plate}A\frac{\∂T_{Plate}}{\∂x}{|}_{x=L_3}+{\mathrm{\λ}}_{Glue2}A\frac{\∂T_{Glue2}}{\∂x}{|}_{x=L_4};$

Heat pipe heat 3 diabatic process:

${\mathrm{\ρ}}_{Pipe}{V}_{Pipe}{\mathrm{Cp}}_{Pipe}\frac{\∂T_{Pipe}}{\∂t}=-{\mathrm{\λ}}_{Glue2}A\frac{\∂T_{Glue2}}{\∂x}{|}_{x=L_4}+{\mathrm{\λ}}_{Pipe}A\frac{\∂T_{Pipe}}{\∂x}{|}_{x=L_5};$

Radiating fin 4 diabatic process:

${\mathrm{\ρ}}_{Fin}{V}_{Fin}{\mathrm{Cp}}_{Fin}\frac{\∂T_{Fin}}{\∂t}=-{\mathrm{\λ}}_{Pipe}A\frac{\∂T_{Pipe}}{\∂x}{|}_{x=L_5}-{\mathrm{hA}}_{Fin}(T_{Fin}-T_f).$

In the present invention, setting up 1D coordinate system along main heat-transfer path, zero is positioned at cell top end, x-axis positive direction It is main heat transfer direction, by lumped parameter method, the temperature of the temperature solid central point of solid is represented, T_CellRepresent battery Temperature, T_Glue1Represent the temperature of heat-conducting silica gel sheet, T_PlateRepresent the temperature of battery modules 5 shell, T_Glue2Represent heat conduction glue-line 6 Temperature, T_PipeRepresent the temperature of heat pipe heat 3, T_FinRepresent the temperature of radiating fin 4.

In the present invention, in the case of the initial temperature on main heat-transfer path determines, above-mentioned 6 partial differential equation simultaneous rise Have and determine solution.For the ease of calculating, carry out depression of order by finite difference calculus and counterbalanced procedure.The most above-mentioned 6 partial differential sides Journey can derive 6 linear equation accordingly, and these 6 linear equation have equally and determine solution.

In the present invention, for certain moment t+ △ t (t was a upper moment, and △ t is the increment on time dimension), first to electricity Pond diabatic process solves, the most successively to heat-conducting silica gel sheet, battery modules 5 shell, heat conduction glue-line 6, heat pipe heat 3 and heat radiation The diabatic process of fin 4 solves, and obtains the temperature value of each element on the t+ main heat-transfer path of △ t, and based on this Solve to subsequent time iterative method, obtain the temperature value of each element on the main heat-transfer path of any instant, thus obtain sometimes Carve the temperature value of each element on main heat-transfer path.

The solution procedure of heat transfer equation is as a example by solving cell heat transfer process:

Formula (1) describes the equation of cell heat transfer process, the increase of energy in this expression battery on the equation equal sign left side Rate, the partial derivative of time can be approximately by temperature by difference scheme

On the right of equal sign, Section 1 is the heating power of battery, it was known that on the right of equal sign Section 2 be battery by with thermal conductive silicon The contact surface of film passes to the heat flow of heat-conducting silica gel sheet, and this part heat flow can be approximated to be

Formula (2) and formula (3) are substituted in formula (1) and obtains

When solving the battery temperature of t+ △ t, temperature on the main heat-transfer path of t is it is known that therefore can basis Formula (4) calculates the temperature of t+ △ t battery, can calculate heat-conducting silica gel sheet, battery modules 5 shell, heat conduction similarly Glue-line 6, heat pipe heat 3 and the temperature of radiating fin 4, and solve to subsequent time iterative method based on this, then obtain institute There is the temperature of each element on moment main heat-transfer path.

In the present invention, the diabatic process on main heat-transfer path can describe with system of linear equations, due in above-mentioned formula Partial differential equations has and determines solution, and the system of linear equations that therefore they are derived also has and determines solution, 6 be derived Linear equation has 10 independent variablees, is T respectively_Cell,T_Glue1,T_Plate,T_Glue2,T_Pipe,T_Fin,T_Init,h,T_f, typically In the case of, when designing cooling system, the initial temperature of whole electrokinetic cell system determines that, then T_InitIt is known that therefore, Battery-heating powerConvection transfer rate h and cooling working medium temperature T_fIn the case of determining, the temperature of battery can be calculated T_Cell。

In the present invention, the result finally according to numerical computations selects cooling scheme.In previous step, the heating of input battery Power, cooling working medium temperature, solve the battery temperature that different convection transfer rate is corresponding, according to the limit to battery maximum temperature System determines the convection transfer rate h required for system；Natural cooling scheme is selected as h=20～60w/m2-k, common In natural cooling process, convection transfer rate maximum only has 25w/m2-k, but works as electric automobile in the process of moving, radiating fin 4 exist relative motion with surrounding air, can directly be dispelled the heat in a large number by radiating fin 4；As h=20～100w/m2-k, choosing Select air blast cooling heat radiation, air channel shell 14 is set outside radiating fin 4；As h=500～15000w/m2-k, select liquid cold scattered Heat, arranges liquid cold runner shell 7 outside radiating fin 4；When h=20～60w/m2-k, can select certainly according to practical situation So cooling or pattern of air blast cooling, the temperature of the cooling working medium of air blast cooling can ratio relatively low, such as, when the outer temperature in summer is When 40 DEG C, the temperature of natural cooling working medium can only be 40 DEG C, but the temperature of air first can be cooled to 20 DEG C, so by air blast cooling After be used for cooling down battery, such radiating effect is more preferable, and the equipment of natural cooling, energy consumption and cost are the most relatively low.Cooling dress The pattern put determines.

The present invention solves in prior art, and the type of cooling is substantially single natural cooling, air-cooled and liquid is cold, and causes Cannot take into account cooling effectiveness, system complexity and safety, meanwhile, the type of cooling of the prior art is fixed, does not has There is autgmentability, the problem using a kind of refrigerating mode can only be fixed for a kind of product, by being set up in parallel in Battery case 1 Some battery modules groups 2, are equipped with heat pipe heat 3 for each battery modules group 2, and the both ends of heat pipe heat 3 pass Battery case 1 Rear connection radiating fin 4, uses heat pipe heat 3 to set up heat transfer path at a high speed, can rapidly and uniformly battery modules group 2 be produced Raw heat is delivered to the outside of Battery case 1；Battery modules group 2 produce heat be passed to Battery case 1 outside it After, it is possible to use this heat is delivered in external environment condition by natural wind, and radiating fin 4 is exposed in atmosphere, radiating fin 4 with , there is relative motion with surrounding air in electric vehicle motion, the most i.e. provides cost savings, energy consumption and space, enhances again simultaneously Heat exchange, improves radiating rate, it is also possible to assemble other mechanism, and the battery modules group 2 for different quantities of heat production is adaptive air-cooled Passage or the cold passage of liquid, can have the advantage that cooling effectiveness is high, system complexity is low and safety is high, extensibility simultaneously concurrently By force, the type of cooling can adjust at random according to the actual demand of product, and standardization level is high；It is different from prior art, bosher It is internal that matter does not enter Battery case 1, and for air blast cooling, Battery case 1 is easily done IP67, cold for liquid, has been Entirely avoid the coolant risk at Battery case 1 internal leakage, easily realize the IP67 design of Battery case 1, save sky Between and cost, improve the safety of electrokinetic cell system.

Claims (10)

1. a chiller for electrokinetic cell system heat pipe fin, including Battery case, it is characterised in that: described battery case Internal being provided with some battery modules groups side by side, described battery modules flock mating closes and is provided with heat pipe heat, and the both ends of described heat pipe heat are worn Crossing Battery case, the both ends of described heat pipe heat connect radiating fin.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 1, it is characterised in that: described Battery modules group includes the 2 row's battery modules being set up in parallel, and described heat pipe heat is located between 2 row's battery modules, described heat pipe heat and Heat conduction glue-line it is additionally provided with between any battery module.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 2, it is characterised in that: described Outside radiating fin, cladding is provided with liquid cold runner shell, and described arbitrary liquid cold runner shell is provided with coolant inlet and coolant Outlet, the coolant inlet on described 2 liquid cold runner shells connects coolant inlet pipe by isocon, and described 2 liquid are cold Cooling liquid outlet on runner shell connects coolant outlet tube by collecting pipe.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 3, it is characterised in that: described Coolant inlet and cooling liquid outlet are arranged at the leading section of liquid cold runner shell.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 2, it is characterised in that: described Outside radiating fin, cladding is provided with air channel shell, and described arbitrary air channel shell is provided with cooling air inlet and cooling air outlet.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 5, it is characterised in that: described Cooling air inlet is located at the front end of air channel shell, and described cooling air outlet is located at the rear end of air channel shell.

The chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 6, it is characterised in that: described Coordinate at cooling air outlet and be provided with fan.

8. the pattern choosing of the chiller using the arbitrary described electrokinetic cell system heat pipe fin of claim 1～7 Selection method, it is characterised in that: described mode selecting method comprises the following steps:

Step 1.1: described electrokinetic cell system exists from battery, sequentially through heat-conducting silica gel sheet, battery modules shell, leads The main heat-transfer path of hot glue layer, heat pipe heat and radiating fin；There is heat-transfer path in described heat pipe heat, described heat-transfer path includes One path, the second path, the 3rd path and the 4th path, described first path and the second paths in series, described 3rd path and With described second paths in series after 4th path parallel connection, described first path is the heat contact surface from heat conduction glue-line Yu heat pipe heat Being delivered to the path in heat pipe heat radial center face, described second path is that heat is inlayed beyond region in heat pipe heat and radiating fin Region along the path of heat pipe heat transfers, described 3rd path be heat heat pipe heat and radiating fin inlay region from Heat pipe heat along being radially delivered to the path of heat pipe heat and radiating fin contact surface, described 4th path be heat heat pipe heat with Radiating fin is inlayed region and is axially delivered to the path of heat pipe heat and radiating fin contact surface from heat pipe heat；The described first via Footpath, the second path, the 3rd path heat output corresponding with the 4th path is respectively q₁、q₂、q₃And q₄, q₁=q₂=q₃+q₄；Heat transfer The temperature of path starting point is T₁, the temperature of heat-transfer path terminal is T₂；

Step 1.2: set up equivalent thermal resistance model, the heat output of the heat-transfer path of described equivalent thermal resistance model is q₅, q₁=q₂=q₃+ q₄=q₅, the origin temp of the heat-transfer path of described equivalent thermal resistance model is T₃, outlet temperature is T₄, T₁-T₂=T₃-T₄；

Step 1.3: before and after setting up equivalent thermal resistance model, the thermal resistance of heat pipe heat is equalSet up equivalent thermal resistance mould Thermal resistance before type is R_Pipe, setting up the thermal resistance after equivalent thermal resistance model isWherein, δ_PipeFor setting up The thickness of heat pipe heat, λ after equivalent thermal resistance model_PipeFor setting up the heat conductivity of heat pipe heat, S after equivalent thermal resistance model_PipeFor setting up The cross-sectional area of heat pipe heat after equivalent thermal resistance model, due to R_Pipe=R_Pipe-Model,

Step 1.4: described radiating fin exists heat-transfer path, described heat-transfer path includes the 5th path and the 6th path, described 5th path is the path that heat is delivered to the fin end face of radiating fin from the substrate bottom surface of radiating fin, described 6th path It is delivered to the path of substrate top surface from radiating fin substrate bottom surface for heat；Set up the equivalent thermal resistance model of radiating fin, logical When crossing identical heat, the temperature difference setting up radiating fin before and after the equivalent thermal resistance model of radiating fin is equal, therefore sets up equivalent heat Thermal resistance R of radiating fin before resistance model_FinWith set up thermal resistance R of radiating fin after equivalent thermal resistance model_Fin-ModelIt is equal,Wherein, δ_FinFor set up radiating fin equivalent thermal resistance model after the thickness of radiating fin, λ_FinFor Set up the heat conductivity of radiating fin, S after the equivalent thermal resistance model of radiating fin_FinFor setting up the equivalent thermal resistance of radiating fin The cross-sectional area of radiating fin after model,

Step 1.5: the main heat-transfer path after the equivalent thermal resistance model described in establishment step 1.2 and step 1.3 is set up and concentrates ginseng The 1D heat transfer model of numberization, the diabatic process of each element is described as with partial differential equation:

Cell heat transfer process:

Wherein, ρ_CellFor cell density, V_CellFor battery volume, Cp_CellFor battery specific heat capacity, T_CellFor battery temperature,For the heating power of battery, λ_CellFor battery heat conductivity, L₁For battery Thickness；

Heat-conducting silica gel sheet diabatic process:

Wherein, ρ_Glue1For thermal conductive silicon Film density, V_Glue1For heat-conducting silica gel sheet volume, Cp_Glue1For heat-conducting silica gel sheet specific heat capacity, T_Glue1For heat-conducting silica gel sheet temperature, λ_Glue1For heat-conducting silica gel sheet heat conductivity, L₂Thickness for heat-conducting silica gel sheet；

Battery modules shell diabatic process:

Wherein, ρ_PlateFor electricity Pond module shell density, V_PlateFor battery modules enclosure volume, Cp_PlateFor battery modules shell specific heat capacity, T_PlateFor battery mould Assembly housing temperature, λ_PlateFor battery modules shell heat conductivity, L₃Thickness for battery modules shell；

Heat conduction glue-line diabatic process:

Wherein, ρ_Glue2For heat conduction Glue-line density, V_Glue2For heat conduction glue-line volume, Cp_Glue2For heat conduction glue-line specific heat capacity, T_Glue2For heat conduction glue-line temperature, λ_Glue2For Heat conduction glue-line heat conductivity, L₄Thickness for heat conduction glue-line；

Heat pipe heat diabatic process:

Wherein, ρ_PipeClose for heat pipe heat Degree, V_PipeFor heat pipe heat volume, Cp_PipeFor heat pipe heat specific heat capacity, T_PipeFor heat pipe heat temperature, λ_PipeFor heat pipe heat heat conductivity, L₅Thickness for heat pipe heat；

Radiating fin diabatic process:

Wherein, ρ_FinFor radiating fin density, V_FinFor radiating fin volume, Cp_FinFor radiating fin specific heat capacity, T_FinFor radiating fin temperature, h is convection transfer rate, A_Fin The area contacted with cooling working medium for radiating fin before setting up equivalent thermal resistance model, T_fFor cooling working medium temperature；

In above partial differential equation, t is the time, and A is cross-sectional area, and x is the coordinate on heat transfer direction；

Step 1.6: calculation procedure 1.5, solves different convection transfer rate pair with heating power, the cooling working medium temperature of battery The battery temperature answered, determines the convection transfer rate h required for system according to the restriction of battery maximum temperature；Work as h=20 ～during 60w/m2-k, select natural cooling scheme, directly dispelled the heat by radiating fin, and radiating fin exists phase with surrounding air To motion；As h=20～100w/m2-k, select air blast cooling heat radiation, air channel shell is set outside radiating fin；Work as h= When 500～15000w/m2-k, select liquid-cooling heat radiation, liquid cold runner shell is set outside radiating fin.

The mode selecting method of the chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 8, its feature exists In: in described step 1.3, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₁Heat for first path Resistance, R₂It is the thermal resistance in the second path, R₃' it is the thermal resistance after the 3rd path and the 4th path parallel connection, the thermal resistance in the 3rd path is R₃With the 4th The thermal resistance in path is R₄, thermal resistance after parallel connection d₁For the thickness of heat pipe heat, S₁Total face is contacted for heat pipe heat and heat conduction glue-line Long-pending, S₂For the gross area of heat pipe heat cross section, S₃For the gross contact area of heat pipe heat Yu radiating fin, l₂It is the length in the second path Degree, l₃The degree of depth of radiating fin, λ is embedded for heat pipe heat_Pipe-rFor heat pipe heat heat conductivity radially, λ_Pipe-aAxial for heat pipe heat Heat conductivity.

The mode selecting method of the chiller of a kind of electrokinetic cell system heat pipe fin the most according to claim 8, It is characterized in that: in described step 1.4, setting up the thermal resistance before equivalent thermal resistance model isWherein, R₅It is the 5th The thermal resistance in path, R₆It is the thermal resistance in the 6th path, Wherein, n is the number of radiating fin, l₄For the total height of radiating fin, l₅For the height of radiating fin substrate, S₄For radiating fin The cross-sectional area of plate base, S₅For total cross-sectional area of fin, λ_FinHeat conductivity for radiating fin.