CN103367835A - Power battery thermal management system based on loop heat pipes - Google Patents

Abstract

The invention discloses a power battery thermal management system based on loop heat pipes. The power battery thermal management system includes a module box, in which at least two battery pack monomer shells are placed. At least over two battery module sets composed of battery monomers connected in series or in parallel are placed in each battery pack monomer shell, wherein loop heat pipes are distributed on the surface of each battery monomer. Each loop heat pipe comprises an evaporation end and a condensation end. The evaporation end fits the battery monomer surface, and the condensation end extends beyond the battery monomer surface. With the characteristics of large heat dissipation capacity, high heat dissipation efficiency and simple processing, the power battery thermal management system can efficiently solve the technical problems of high-temperature heat dissipation, low temperature heating and heat preservation, as well as heat recycling of power batteries, and is suitable for various electrical equipment dependent on power batteries to drive, thus having broad market prospects.

Description

A kind of power battery thermal management system based on loop circuit heat pipe

Technical field

The present invention relates to a kind of power battery thermal management system, relate in particular to a kind of power battery thermal management system based on loop circuit heat pipe.

Background technology

Along with becoming increasingly conspicuous of the problems such as energy crisis and environmental pollution; and countries in the world are to the continuous intensification of energy-saving and emission-reduction and environmental protection understanding, rely on the electrical equipments such as electric automobile that electrokinetic cell drives and hybrid vehicle must become the trend that clean energy resource develops.Especially electric automobile provides power by electrokinetic cell, and non-pollutant discharge has more economy than fuel vehicle simultaneously, has caused worldwide generally attention.Because electrokinetic cell is in charge and discharge process, inner chemical reaction is complicated, especially in large scale and the heavy-current discharge process, inside battery produces rapidly a large amount of heat, the accumulation of heat must cause that battery temperature raises, and then battery performance is descended, in addition leakage may appear, the phenomenon such as exit, smolder, battery occurs acutely to burn and blast when serious, affects vehicle performance.Therefore, electrokinetic cell is seriously restricting the development of electric automobile etc.

In recent years, the active demand of battery thermal management has caused the concern of many electric automobile production firms and battery manufacturers, and at present, electrokinetic cell generally all adopts the simplest cooling air mode on the market, seldom adopts other the type of cooling.The patent No. is that the Chinese utility model patent of ZL200920055746.7 discloses two kinds of power battery devices with phase-change material and high efficiency and heat radiation, dual mode all has certain thermal management effect, but only by Battery case plate and extraneous exchange, latter's processing and fabricating is cumbersome for the heat of the former phase-change material.Publication number CN201646430U discloses a kind of Vehicular battery radiating module, heat production mechanism when this module radiating device runner does not consider that electrokinetic cell discharges and recharges, and radiating effect is preferential, and reckons without the recycling of heat.Publication number CN201421869 discloses a kind of battery heat dissipation device that comprises radiator, thermoelectric element and heat pipe, this the device in used heat pipe inserted mode contact with host rack, thermal resistance is larger, and heat-sinking capability is preferential, does not consider that equally battery heat production characteristic and heat are recycling.

Summary of the invention

By Given this, the purpose of this invention is to provide a kind of power battery thermal management system based on loop circuit heat pipe, have that heat dissipation capacity is large, radiating efficiency is high, process simple characteristics, can solve efficiently the heat radiation of electrokinetic cell high temperature, low-temperature heat insulation and the recycling technical problem of heat.

To achieve these goals, the present invention is by the following technical solutions:

A kind of power battery thermal management system based on loop circuit heat pipe, comprise modular tank, in modular tank, be placed with at least two batteries monomer housings, be placed with in each batteries monomer housing more than at least two by battery cell series winding or the group of battery modules that consists of in parallel, wherein, the surface distributed of described every battery cell has loop circuit heat pipe, described loop circuit heat pipe is divided into evaporation ends and condensation end, fit in described evaporation ends and battery cell surface, described condensation end stretches out outside the battery cell surface.

As preferably, fit in described evaporation ends and battery cell surface.

As preferably, described condensation end stretches out the modular tank outside.

As preferably, be filled with the liquid or solid phase-change material in the described modular tank.

As preferably, when being filled with the liquid or solid phase-change material in the modular tank, modular tank is the solid flat board of sealing, and described modular tank offers fluid intake and fluid issuing.

As preferably, described loop circuit heat pipe is made by high heat-conducting copper material or light high heat conducting aluminium.

Beneficial effect of the present invention is:

The present invention is by the ingenious combination of various heat pipes especially loop circuit heat pipe and battery, the battery heat is delivered in the environment outside the battery body by loop circuit heat pipe etc. goes, wherein loop circuit heat pipe or other heat pipe are all according to the lack of uniformity appropriate design of battery heat production, has heat dissipation capacity large, radiating efficiency is high, process the advantages such as simple, can solve efficiently the variety of issues such as electrokinetic cell high temperature heat radiation, low-temperature heat insulation and heat be recycling.

It is that solid or liquid etc. are selected the processing and fabricatings such as solid flat board or porous flat plate that modular tank of the present invention can be filled according to inside, can fastening battery simple in structure again, the condensation end of loop circuit heat pipe can be selected to be wrapped in modular tank inside or stretch out modular tank according to body structure, and group of battery modules integral heat sink function can be complementary with the car load design.

Group of battery modules of the present invention can be dispelled the heat under hot environment, possess simultaneously heating battery and maintenance steady temperature in the low temperature environment, make each battery cell reach optimum working temperature, and the heat that produces in battery being discharged again by appropriate design in low temperature environment is used in the vehicle cabin, is the compartment heating.

The present invention has efficiently, energy-saving and environmental protection, simple in structure, cost is low, easy for installation, stable and reliable, the advantages such as functional diversities.Need not external force or need not under additional battery power consumption, the various charge status, electrokinetic cell is carried out the High Efficiency Thermal management, comprise heat radiation, heating, working temperature control, recycling residual heat etc., be applicable to the electrical equipment that various dependence electrokinetic cells drive, have wide market prospects.

Description of drawings

Fig. 1 is structural representation of the present invention;

The plan structure schematic diagram of Fig. 2 Fig. 1;

Fig. 3 is that schematic diagram is looked on a left side of the present invention;

Fig. 4 is side-looking overall structure schematic diagram of the present invention.

Embodiment

Below by specific embodiment, and by reference to the accompanying drawings, the preferred embodiments of the present invention are described in detail.

As shown in Figure 1, native system is in the situation that need not extra power, and the transfer of heat that battery cell is produced by loopcircuit heat pipe 3 is carried out efficient heat management to battery in the cell module outer portion environment.Native system comprisesmodular tank 1 and top cover of box, inmodular tank 1, be placed with at least twobatteries monomer housings 2, be placed with the group of battery modules that is made of battery cell series winding or parallel connection more than at least two in eachbatteries monomer housing 2, the surface distributed of every battery cell has loop circuit heat pipe 3.As shown in Figure 3, described loopcircuit heat pipe 3 is divided intoevaporation ends 4 andcondensation end 5, andevaporation ends 4 is fitted with the battery cell surface, andcondensation end 5 stretches out outside the battery cell surface.

Shown in Figure 2, described battery cell can adopt all types such as lead-acid battery, Ni-MH battery, lithium ion battery that battery and the electrokinetic cell of heat generation are arranged in charge and discharge process;Batteries monomer housing 2 works to separateevaporation ends 4 and thecondensation end 5 of loopcircuit heat pipe 3, avoidscondensation end 5 heat disturbances.

As shown in Figure 3 and Figure 4, evaporation ends 4contact battery cells 2 surfaces, bonding by fill heat-conductive bonding agent and battery cell surface with high thermal conductivity coefficient in the contactsite.Evaporation ends 4 plays fixedly loopcircuit heat pipe 3 and increase battery cell and loopcircuit heat pipe 3 contacts area for the tube-in-tube structure device.

As shown in Figure 2, stretch outmodular tank 1 outside nearmodular tank 1 outer condensation end 4.Rely on horizontal condensation end ofheat pipe 4, the enhance heat of plunderring of car gas when advancing.

As shown in Figure 4, can inmodular tank 1, be filled with the liquid or solid phase-change material, comprise: water and wherein disastrously assorted microcapsules, the liquid of nano capsule phase change material, paste materials, and paraffin, based on the phase-change materials such as various solid-liquids of paraffin; By each class I liquid I or all kinds of phase-change material neither endothermic nor exothermic inmodular tank 1 interior filling, under the various charge status of battery cell, keep its suitable temperature range, comprise heating under the low temperature and insulation etc.; The evaporation ends 4 of loopcircuit heat pipe 3 contacts directly that contact the heat that battery is produced with each class I liquid I or all kinds of phase-change material recycling, comprises for the HVAC in electric automobile or the hybrid vehicle compartment, cogeneration etc.

Loopcircuit heat pipe 3 is made by high heat-conducting copper material or light high heat conducting aluminium.Comprise general heat pipe, separate heat pipe, capillary pump loop heat pipe, micro heat pipe, flat-plate heat pipe, radial heat pipe, loop circuit heat pipe etc., heat pipe the arrangement mode of battery surface according to different batteries but thermal characteristics and arrange or arrange.

During battery charging and discharging, the evaporation ends of loop circuit heat pipe 34 absorbs the heat that batteries produce, and bycondensation end 5 heat is emitted, and is enhance heat, and thecondensation end 5 that is positioned atmodular tank 1 two ends can pass the outside of modular tank 1.When top cover of box andmodular tank 1 are porous flat plate and form, utilize that the air in advancing such as electric automobile is horizontalplunders condensation end 5 accelerated heat transmission.In hot environment, its heat can be used for the cogeneration midget plant; In low temperature environment, it is the carriage of electric automobile heating that its heat can be used as the auxiliary heating measure.

Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.

Claims (6)

1. power battery thermal management system based on loop circuit heat pipe, comprise modular tank and top cover of box, in modular tank, be placed with at least two batteries monomer housings, be placed with in each batteries monomer housing more than at least two by battery cell series winding or the group of battery modules that consists of in parallel, it is characterized in that: the surface distributed of described every battery cell has loop circuit heat pipe, described loop circuit heat pipe is divided into evaporation ends and condensation end, fit in described evaporation ends and battery cell surface, described condensation end stretches out outside the battery cell surface.

2. a kind of power battery thermal management system based on loop circuit heat pipe according to claim 1 is characterized in that: described evaporation ends and the applying of battery cell surface.

3. a kind of power battery thermal management system based on loop circuit heat pipe according to claim 1 and 2, it is characterized in that: described condensation end stretches out the modular tank outside.

4. a kind of power battery thermal management system based on loop circuit heat pipe according to claim 1 is characterized in that: be filled with the liquid or solid phase-change material in the described modular tank.

5. a kind of power battery thermal management system based on loop circuit heat pipe according to claim 4, it is characterized in that: when being filled with the liquid or solid phase-change material in the modular tank, modular tank is the solid flat board of sealing, and described modular tank offers fluid intake and fluid issuing.

6. a kind of power battery thermal management system based on loop circuit heat pipe according to claim 1, it is characterized in that: described loop circuit heat pipe is made by high heat-conducting copper material or light high heat conducting aluminium.

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