CN103165952A - Lithium battery core capable of radiating heat by directly conducting heat from internal to external - Google Patents

Lithium battery core capable of radiating heat by directly conducting heat from internal to external Download PDF

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Publication number
CN103165952A
CN103165952A CN2011104092367A CN201110409236A CN103165952A CN 103165952 A CN103165952 A CN 103165952A CN 2011104092367 A CN2011104092367 A CN 2011104092367A CN 201110409236 A CN201110409236 A CN 201110409236A CN 103165952 A CN103165952 A CN 103165952A
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China
Prior art keywords
heat
positive
fin
negative
packaging bag
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Pending
Application number
CN2011104092367A
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Chinese (zh)
Inventor
王清风
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LOROM INDUSTRIAL Co Ltd
Lorom Ind Co Ltd
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LOROM INDUSTRIAL Co Ltd
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Priority to CN2011104092367A priority Critical patent/CN103165952A/en
Publication of CN103165952A publication Critical patent/CN103165952A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to a lithium battery core capable of radiating heat by directly conducting heat from internal to external. The lithium battery core comprises a packaging bag for accommodating a positive electrode, a negative electrode, a separator membrane for separating the positive electrode and the negative electrode, and an electrolyte solution. The packaging bag is also provided with at least one heat radiation fin; and at least one side of the heat radiation fin protrudes out of one side of the packaging bag. Heat produced from the positive electrode and the negative electrode is transmitted to the heat radiation fin through the electrolyte solution, so that efficiency reduction or damage caused by overheating of the lithium battery core can be prevented. Besides, the lithium battery core can be operated in cooperation with a fan or a cooling system, so that heat can be continuously removed from the heat radiation fin, and heat radiation efficiency is increased.

Description

Direct heat conduction internally is to the outside lithium cell core that dispels the heat
Technical field
The present invention relates to a kind of lithium cell core, particularly a kind of direct heat conduction internally is to the outside lithium cell core that dispels the heat.
Background technology
The lithium rechargeable battery of broad sense (hereinafter to be referred as lithium battery) is made of positive pole, negative pole, barrier film and electrolyte between this both positive and negative polarity.Barrier film is separated from each other both positive and negative polarity, does not contact each other.Barrier film and both positive and negative polarity have extremely many micro-pores simultaneously, can allow electrolyte circulate between both positive and negative polarity.
Lithium battery has high-energy-density, high power density, capacitance and reaches greatly the advantages such as memory-less effect.Yet electrolyte wherein has combustibility, when temperature rises, can decompose and discharge amount of heat when the both positive and negative polarity active material, causes lithium battery under improper operating position, may produce danger, even sets off an explosion.
The heat that lithium battery produces because of improper use, mainly can be divided into two kinds of forms: a kind of when meeting improper load for positive and negative terminal, the reaction of caused inside battery, such as overcharge (charging voltage is too high), cross put, heat that external short circuit (instantaneous large-current) etc. produces can cause cell integrated temperature to rise; Another kind is that lithium battery suffers external force, as clashing into, when puncture, crushing, can making inside battery moment partial short-circuit and produce high temperature.
Except the heat that improper use produces, the normal chemical reaction of lithium battery is also main thermal source.When the lithium battery temperature arrives a certain degree, can cause lithium battery interior material production chemical reaction and emit heat, if accumulation of heat speed is greater than radiating rate, make temperature continue to raise, cause again other exothermic effect, will cause the lithium battery self-heating, the temperature fast rise.This is referred to as thermal runaway (Thermal Runaway), is that lithium battery produces dangerous main cause.Therefore, how removing the heat of lithium battery and avoid heat to accumulate is very important problem.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of lithium cell core that possesses the heat radiation function, the heat that inside produces can be conducted to the outside and dispel the heat, avoid heat to accumulate, make lithium cell core be remained in best working temperature.
For achieving the above object, the present invention takes following technical scheme:
Lithium cell core of the present invention, comprise a packaging bag, take in positive pole, negative pole in this packaging bag, separate barrier film and the electrolyte of this both positive and negative polarity, also be provided with at least one fin in this packaging bag, this fin has on one side side-prominent from this packaging bag at least, and the heat that this both positive and negative polarity produces is passed to this fin via this electrolyte and is dispersed into outside this packaging bag.
Described positive pole is comprised of some positive plates, and negative pole is comprised of some negative plates, and this fin can be in order to displacement wherein a positive plate or negative plate, on also can overlap therein a positive plate or negative plate.
The number of described negative plate can be than the number of positive plate many a slices.
In preferred embodiment, described lithium cell core also can coordinate the operation of fan or cooling system, to continue removing heat from this fin, improves radiating efficiency.
Described cooling system comprises a pipeline around this fin, a heat exchanger around this pipeline, circulates cooling fluid and the liquor pump that absorbs heat in this pipeline, and a heat that this cooling fluid is dispersed on this heat exchanger forces to disperse airborne fan.
The invention has the beneficial effects as follows: the present invention's effect against existing technologies is, the inner heat that produces of lithium cell core can be passed to the outside and dispel the heat, and avoids overheated and reduces its usefulness or damage.
Coordinate the graphic embodiment explanation can be fully clear as for technology contents of the present invention and other purpose and characteristics with reference to following.
Description of drawings
Fig. 1 is first embodiment of the present invention front view.
Fig. 2 is the amplification profile along 2-2 line in Fig. 1.
Fig. 3 is the subelement outside drawing of Fig. 1.
Fig. 4 is second embodiment of the present invention front view.
Fig. 5 is third embodiment of the present invention front view.
Fig. 6 is the plane graph that the present invention coordinates the cooling system operation.
Drawing reference numeral: 10, lithium cell core; 12, packaging bag; 12a, internal layer; 12b, middle level; 12c, skin; 14, core chamber; 16, positive pole; 16a, positive plate; 16b, positive pole ear; 18, negative pole; 18a, negative plate; 18b, negative lug; 20, barrier film; 22, fin; 30, cooling system; 32, pipeline; 34, cooling fluid; 36, heat exchanger; 38, liquor pump; 40, fan.
Embodiment
Fig. 1 is that the present invention's direct heat conduction internally is to the plane of the outside lithium cell core 10 that dispels the heat, Fig. 2 is its section, Fig. 3 is the outward appearance of its subelement, can be for explanation technology contents of the present invention, and wherein the direction of relevant upper and lower, left and right is take Fig. 1 as reference data.This lithium cell core 10 comprises a packaging bag 12, takes in anodal 16, negative pole 18, the barrier film 20 of separating this both positive and negative polarity and electrolyte (not shown) in the core chamber 14 of defining in this packaging bag 12 inside.Described sealing bag 12 is made bag-shaped through thermal welding by internal layer 12a, middle level 12b and outer 12c trilaminate material, this trilaminate material generally adopts polypropylene (PP), aluminium foil and nylon (Nylon), but also can be other suitable material, not limited by above-mentioned material.Anodal 16 are comprised of some positive plate 16a.Negative pole 18 is comprised of some negative plate 18a.In preferred embodiment, the quantity of negative plate 18a is than many a slices of quantity of positive plate 16a, and coming and going free lithium ion in electrolyte so that chemical reaction to be provided has the space that enough persists.When positive plate 16a is identical with negative plate 18a quantity, may causes lithium battery capacity to be difficult to reach the optimization coupling and reduce the part capacity.The positive pole ear 16b of positive plate 16a and the negative lug 18b of negative plate 18a stagger outside the upside of packaging bag 12 protrudes from, for electrical connection.All have extremely many micro-pores (not shown) on barrier film 20 and positive plate 16a and negative plate 18a, can allow electrolyte circulate between positive pole 16 and negative pole 18.
The above is the essential structure of lithium cell core, belongs to prior art.Characteristics of the present invention are, form in some positive plate 16a of positive pole 16, have at least a positive plate 16a to be replaced by fin 22, this fin 22 adopts the material of high-termal conductivity, make such as copper or aluminium etc., and its right is outstanding from the right side of packaging bag 12, the heat that positive pole 16 and negative pole 18 are produced can be passed to fin 22 via electrolyte, and be dispersed into the outside of packaging bag 12, avoid lithium cell core overheated and reduce its usefulness or damage.
According to same principle, described fin 22 also can be used to a wherein negative plate 16a of displacement, perhaps in the situation that do not reduce positive plate 16a and negative plate 18a quantity, fin 22 is overlapped on positive plate 16a or negative plate 18a, not limited by above-described embodiment, but in such event, lithium battery can be sacrificed the part capacity.
Several lithium cell cores 10 are contacted or are connected in parallel; make it reach desired voltage, capacity; and the circuit of balancing cell management system (BMS) and necessity etc.; after fixing with shell again and protecting; be and for the lithium battery of business, comprise as energy storage and the driving of the products such as electric automobile, oily electric hybrid vehicle, electric motor car, electric bicycle, boats and ships, aircraft, UPS (UPS), electric hand-held tool and using with power supply (the larger electric current of moment needs).The occasion of using in indoor security zone also can be adopted openly, does not namely use shell fix and protect, in order to heat radiation.
Need know, the present invention is limited to above-described embodiment, and it can be other different kenel.For example, lithium cell core 10 that can be as shown in Figure 4 makes the base of fin 22 outstanding from the bottom side of packaging bag 12, or lithium cell core as shown in Figure 5 10, and the right and left that makes fin 22 is left side and the right side of outstanding packaging bag 12 respectively.Briefly, except the upside of packaging bag 12, what fin 22 can be from packaging bag 12 is any one side-prominent, avoids being in upside together and causing the inconvenience of making or using with positive pole ear 16b and negative lug 18b.The Main Differences of the second and the 3rd embodiment and the first embodiment is the direction of fin 22 outstanding packaging bags 12, remainder is identical, therefore the part identical with the first embodiment is all with identical symbology, and before the explanation for the first embodiment also was applicable to the second and the 3rd embodiment, repeated no more.
Again, loose pad 22 also can coordinate the fan (not shown) to implement.The function of fan is to cause one strong wind by fin 22, and the heat that is dispersed into fin 22 is forced to disperse in air, improves by this radiating efficiency.
In addition, the present invention also can coordinate cooling system 30 operations.As shown in Figure 6, this cooling system 30 includes pipeline 32 around fin 22, and the cooling fluid 34(of circulation in pipeline 32 represents with arrow), with the heat absorption that fin 22 is distributed.The surrounding of pipeline 32 also is equipped with heat exchanger 36 to promote its heat to transmit; The cooling fluid 34 that this heat exchanger 36 can make volume contacts with each other across pipeline 32 and large quantity of air, makes dissipation of heat in cooling fluid 34 in air.Cooling system 30 also possesses the liquor pump 38 that cooling fluid of making 34 circulates in pipeline 32.So, cooling system 30 is sustainable when operation removes heat by fin 22, guarantees that lithium cell core 10 is unlikely overheated.40, the fan of cooling system 30 can cause one strong wind by heat exchanger 36, forces to disperse in air with the heat that cooling fluid 34 is dispersed on heat exchanger 36, improves radiating efficiency.
Certainly, above-described embodiment can some variations in addition under not departing from the scope of the present invention, thus above explanation comprises and accompanying drawing shown in whole items should be considered as exemplary, but not in order to limit claim of the present invention.

Claims (7)

1. a direct heat conduction internally is to the outside lithium cell core that dispels the heat, comprise a packaging bag, take in positive pole, negative pole in this packaging bag, separate barrier film and the electrolyte of this both positive and negative polarity, it is characterized in that, also be provided with at least one fin in this packaging bag, this fin has on one side side-prominent from this packaging bag at least, and the heat that this both positive and negative polarity produces is passed to this fin via this electrolyte and is dispersed into outside this packaging bag.
2. lithium cell core according to claim 1, is characterized in that, described positive pole is comprised of some positive plates, and described negative pole is comprised of some negative plates, and described fin is in order to replace wherein a positive plate or negative plate.
3. lithium cell core according to claim 1, is characterized in that, described positive pole is comprised of some positive plates, and described negative pole is comprised of some negative plates, and described fin overlaps therein on a positive plate or negative plate.
4. according to claim 2 or 3 described lithium cell cores, is characterized in that, many a slices of number of the more described positive plate of number of described negative plate.
5. according to claim 1,2 or 3 described lithium cell cores, is characterized in that, the heat that wherein is dispersed into described fin is forced to disperse in air by a fan.
6. according to claim 1,2 or 3 described lithium cell cores, it is characterized in that, described fin coordinates again a cooling system operation, this cooling system comprises a pipeline around described fin, a heat exchanger around this pipeline, and one circulates cooling fluid and the liquor pump that absorbs heat in this pipeline.
7. lithium cell core according to claim 6, is characterized in that, described cooling system comprises again a heat that described cooling fluid is dispersed on described heat exchanger forces to disperse airborne fan.
CN2011104092367A 2011-12-09 2011-12-09 Lithium battery core capable of radiating heat by directly conducting heat from internal to external Pending CN103165952A (en)

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Application publication date: 20130619