CN103855355A - Power battery pole ears and power battery - Google Patents

Power battery pole ears and power battery Download PDF

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Publication number
CN103855355A
CN103855355A CN201210504992.2A CN201210504992A CN103855355A CN 103855355 A CN103855355 A CN 103855355A CN 201210504992 A CN201210504992 A CN 201210504992A CN 103855355 A CN103855355 A CN 103855355A
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CN
China
Prior art keywords
electrolyte
electrokinetic cell
lug
negative electrode
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201210504992.2A
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Chinese (zh)
Inventor
周明杰
王要兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Original Assignee
Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oceans King Lighting Science and Technology Co Ltd, Shenzhen Oceans King Lighting Engineering Co Ltd filed Critical Oceans King Lighting Science and Technology Co Ltd
Priority to CN201210504992.2A priority Critical patent/CN103855355A/en
Publication of CN103855355A publication Critical patent/CN103855355A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/70—Arrangements for stirring or circulating the electrolyte
    • H01M50/77—Arrangements for stirring or circulating the electrolyte with external circulating path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides power battery pole ears and a power battery. The power battery pole ears are a hollow conductive cylinder. The power battery comprises a casing, an electric core and an electrolyte which are arranged in the casing, a positive pole ear and a negative pole ear which are electrically connected with the electric core, and an electrolyte circulating pump and an electrolyte constant temperature system which are externally arranged on the casing. The positive pole ear and the negative pole ear are the power battery pole ears, one end parts of the power battery pole ears both extends out of the casing, the end part of negative pole ear, which extends out of the casing, is successively connected via an electrolyte guide pipeline with the electrolyte circulating pump, the electrolyte constant temperature system and the end part of the positive pole ear, which extends out of the casing, and an electrolyte circulation channel is formed. The power battery pole ears enable the electrolyte to flow in and out through the hollow pipeline. The power battery is stable in working temperature and high in safety performance.

Description

A kind of electrokinetic cell lug and electrokinetic cell
Technical field
The invention belongs to power battery technology field, be specifically related to a kind of electrokinetic cell lug and electrokinetic cell.
Background technology
Along with lithium ion battery is in the extensive use aspect power vehicle, mobile phone, notebook computer and other digital product, the requirement of the performance of people to lithium ion battery is also more and more higher, not only wish that lithium ion battery has outstanding chemical property, cheap price, also requires lithium ion battery to possess reliable security performance simultaneously.
The shell of existing lithium ion battery is divided into metal shell and plastic casing, and metal shell has box hat and aluminum hull etc., and non-metal shell has plastic housing and aluminum plastic film packing etc.Comparatively speaking, lithium ion battery prepared by non-metal shell has security performance relatively reliably.But no matter which kind of battery, when battery is comparing under exacting terms, or be easy to cause that inner heat is excessive in the situation that of abuse, heat can not be derived in time, causes amount of localized heat too high, electrolyte decomposition, the problems such as electrode material generation chemical corrosion, cause both positive and negative polarity recurring structure to cave in etc., cause internal short-circuit of battery, bring potential safety hazard and serious adverse consequences.Especially for electrokinetic cell, its power output is large, and the heat producing in work is more, if there is no good heat-conducting system, its life-span and potential safety hazard will be had a strong impact on.
So security performance is very important measurement index for lithium ion battery.At present conventional radiating mode is mainly and between battery cell, arranges as the sheet metal of aluminium flake etc. carrys out auxiliary heat dissipation, or headspace between employing battery cell, utilizes the modes such as air circulation to dispel the heat.Reduce the effect of internal temperature of battery although different radiating modes can play to a certain extent, adopt the mode one side of aluminium radiator fin to increase the weight of power battery pack itself, also improved the cost of manufacture of battery pack.And headspace between employing battery cell, then the method for utilizing air circulation to take away heat adopts the method for air conducting heat well can not be led away on the one hand in the time that battery is worked under adverse circumstances, has also reduced on the other hand energy density per unit volume metric density and the power density of battery pack.Therefore, need to provide a kind of simple in structure, it is one of current problem anxious to be resolved of this field scientific research personnel that security performance is promoted to the significant radiating mode of effect.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art, a kind of simple in structure, the electrokinetic cell lug that can realize circulate electrolyte circulation is provided.
Another object of the present invention is to provide a kind of working temperature to stablize and the high electrokinetic cell of security performance.
In order to realize foregoing invention object, the technical scheme of the embodiment of the present invention is as follows:
A kind of electrokinetic cell lug, its conducting post that is hollow.
And, a kind of electrokinetic cell, the anode ear and the negative electrode lug that comprise housing, be arranged on battery core in housing and electrolyte and be electrically connected with battery core, also comprise the electrolyte circulating pump and the electrolyte constant temperature system that are arranged on outside described housing; Described anode ear and negative electrode lug are above-mentioned electrokinetic cell lug, all stretch out outside described housing its one end, and the end of stretching out outside housing of stretching out the equal electrolyte circulating pump in end, electrolyte constant temperature system and another lug outside housing of the arbitrary lug in described anode ear, negative electrode lug is connected by electrolyte conduit successively, form circulate electrolyte passage.
The cylinder that above-mentioned electrokinetic cell lug is hollow, can make electrolyte be flow to and be flowed out by the pipeline of this hollow, thereby the working temperature of assurance electrolyte is very fixed.
It is battery pole ear that above-mentioned electrokinetic cell adopts above-mentioned electrokinetic cell lug, makes this electrokinetic cell have following technique effect:
1. at electrokinetic cell, independent safe explosion-proof device need not be set, electrolyte circulates by the hollow pipeline of battery pole ear, can effectively lead walking power inside battery air pressure, has effectively adjusted the pressure stability of electrokinetic cell inside.
2., while work under large electric current, high load capacity or harsh conditions, the electrolyte circulating is taken away heat in time, has kept the constant of electrokinetic cell internal temperature, has effectively controlled cell integrated problem, has improved the usage safety performance of electrokinetic cell.
3. the heat by inside battery that electrokinetic cell not only can be good is derived, under the conditions such as severe cold weather, can also battery temperature be returned to by the circulation of electrolyte to the optimum working temperature scope of electrokinetic cell from lower temperature, widen the operating temperature range of electrokinetic cell, the capacity performance that has improved electrokinetic cell, has increased the security performance in wide temperature range.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention electrokinetic cell lug front view;
Fig. 2 is the another kind of structural representation of embodiment of the present invention electrokinetic cell lug;
Fig. 3 is the cross sectional representation of a kind of structure of embodiment of the present invention electrokinetic cell lug;
Fig. 4 is a kind of preferred structure schematic diagram of embodiment of the present invention electrokinetic cell;
Fig. 5 is the another kind of preferred structure schematic diagram of embodiment of the present invention lithium ion battery.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of simple in structure, the electrokinetic cell lug that can realize electrolyte circulation.Referring to Fig. 1 to Fig. 3, the conducting post that this electrokinetic cell lug 1 is hollow, comprises relative both ends 11,12 and hollow side wall 13 and hollow cavity 14.When for battery, the lug 1 of this hollow structure can make electrolyte flow to and flow out.
As another preferred embodiment of the present invention, above-mentioned electrokinetic cell lug 1 one end 11 endcappeds, are offering the hole 15 for electrolyte microtubular is set near in the hollow side wall 13 of closed end, as shown in Figure 2.The electrokinetic cell lug 1 of this structure can avoid electrolyte directly flow to or flow out from end 11 ends, and makes electrolyte flow to or flow out from the hole 15 of sidewall, thereby is convenient to being electrically connected of operational module and this electrokinetic cell lug 1.
Concrete, in the various embodiments described above, hollow cavity 14 diameters that above-mentioned electrokinetic cell lug 1 is conducting post are preferably 0.1～10mm.The diameter of this cavity 14 can make electrolyte keep best flow velocity, thereby makes the electrolyte in electrokinetic cell keep relatively stable temperature.
The cross section that above-mentioned electrokinetic cell lug 1 is conducting post be preferably hollow circle as shown in Figure 3, square or polygon.The material of this conducting post is copper, aluminium or alloy.
From the above mentioned, the cylinder that above-mentioned electrokinetic cell lug is hollow, can make electrolyte be flow to and be flowed out by the pipeline of this hollow, thereby the working temperature of assurance electrolyte is very fixed.
Correspondingly, the embodiment of the present invention also provides the electrokinetic cell that a kind of electrokinetic cell working temperature is stable, security performance is high.As shown in Figure 4,5, it comprises housing 2, is arranged on battery core and electrolyte (battery core and electrolyte figure all do not show), the anode ear 3 and the negative electrode lug 4 that are electrically connected with battery core in housing 2 and is arranged on electrolyte circulating pump 5 and the electrolyte constant temperature system 6 outside housing 2 this power battery structure.Wherein, anode ear 3 and negative electrode lug 4 are electrokinetic cell lug 1 as shown in Figure 1 mentioned above, all stretch out outside housing 2 one end 31 and 41, and end 41 ends that this of negative electrode lug 4 stretches out outside housing 2 are connected by electrolyte conduit 7 successively with end 31 ends that stretch out outside housing of electrolyte circulating pump 5, electrolyte constant temperature system 6 and anode ear 3, form circulate electrolyte passage, as shown in Figure 4.In this electrokinetic cell, provide circulate electrolyte power by electrolyte circulating pump 5, electrolyte is extracted out from end 41 ends of negative electrode lug 4, and send into and in electrolyte constant temperature system 6, carry out heat exchange, electrolyte temperature is down to after design temperature, is then back in housing 2 from end 31 ends of anode ear 3.
Certainly, also can improve the electrokinetic cell shown in Fig. 4, end 31 ends that stretch out outside housing of anode ear 3 are connected by electrolyte conduit 7 successively with end 41 ends that stretch out outside housing of electrolyte circulating pump 5, electrolyte constant temperature system 6 and negative electrode lug 4, form circulate electrolyte passage.The electrolyte of this improved electrokinetic cell is extracted out from end 31 ends of anode ear 3, and end 41 ends from negative electrode lug 4 after electrolyte circulating pump 5, electrolyte constant temperature system 6 are back in housing 2.
As the preferred embodiments of the present invention, the anode ear 3 in above-mentioned electrokinetic cell as shown in Figure 4 and negative electrode lug 4 are changed and be made as the electrokinetic cell lug 1 shown in Fig. 2 as described above.The end tip 31,41 that anode ear 3 and negative electrode lug 4 stretch out outside housing 2 is all sealed, all offering the hole 15 for electrolyte microtubular is set near in the hollow side wall of closed end, the end of anode ear 3 and negative electrode lug 4 another openings is all electrically connected with battery core, and this of negative electrode lug 4 stretches out the hole 15 of offering the end 41 outside housing 2 and is connected successively by electrolyte conduit 7 with the hole 15 of offering the end 31 outside housing of stretching out of electrolyte circulating pump 5, electrolyte constant temperature system 6 and anode ear 3, form circulate electrolyte passage, as shown in Figure 5.In this electrokinetic cell, provide circulate electrolyte power by electrolyte circulating pump 5, extract out in the hole 15 that electrolyte is offered from the end 41 of negative electrode lug 4, and send into and in electrolyte constant temperature system 6, carry out heat exchange, electrolyte temperature is down to after design temperature, and the hole 15 of then offering from the end 31 of anode ear 3 is back in housing 2.
Certainly, also can improve the electrokinetic cell shown in Fig. 5, the hole 15 that stretching out of anode ear 3 offered the end 31 outside housing is connected by electrolyte conduit 7 successively with the hole 15 of offering the end 41 outside housing of stretching out of electrolyte circulating pump 5, electrolyte constant temperature system 6 and negative electrode lug 4, forms circulate electrolyte passage.Extract out in the hole 15 that the electrolyte of this improved electrokinetic cell is offered from the end 31 of anode ear 3, and the hole 15 of offering from the end 41 of negative electrode lug 4 after electrolyte circulating pump 5, electrolyte constant temperature system 6 is back in housing 2.
As another preferred embodiment of the present invention, this embodiment improves the another kind of above-mentioned electrokinetic cell as shown in Figure 4, electrokinetic cell lug shown in negative electrode lug in electrokinetic cell shown in Fig. 44 use Fig. 21 is substituted, this negative electrode lug 4 stretch out end 41 endcappeds outside housing 2, offering the hole 15 for electrolyte microtubular is set near in the hollow side wall of closed end, the end of another opening of negative electrode lug 4 is electrically connected with battery core.Anode ear 3 is constant, i.e. both ends open as shown in Figure 1 and the conducting post of hollow, and its one end end 31 is communicated with electrolyte conduit 7, and the other end is electrically connected with battery core.And the hole 15 of the end tip 41 of negative electrode lug 4 is connected by electrolyte conduit 7 successively with end 31 ends that stretch out outside housing of electrolyte circulating pump 5, electrolyte constant temperature system 6 and anode ear 3, form circulate electrolyte passage.In this electrokinetic cell, provide circulate electrolyte power by electrolyte circulating pump 5, extract out in the hole 15 that electrolyte is offered from the end 41 of negative electrode lug 4, and send into and in electrolyte constant temperature system 6, carry out heat exchange, electrolyte temperature is down to after design temperature, is then back in housing 2 from end 31 ends of anode ear 3.Certainly, end 31 ends of this anode ear 3 also can be connected by electrolyte conduit 7 successively with the hole 15 of offering the end 41 outside housing of stretching out of electrolyte circulating pump 5, electrolyte constant temperature system 6 and negative electrode lug 4, form circulate electrolyte passage.
Electrolyte circulating pump 5 in the various embodiments described above can be selected the conventional circulating pump in this area, power is selected according to the model of electrokinetic cell, its effect is used to circulate electrolyte in electrokinetic cell that circulation power is provided, as by electrolyte from the interior extraction of housing 2, and send in electrolyte constant temperature system 6, be then back in housing 2.
Electrolyte constant temperature system 6 in the various embodiments described above can be heat-exchange system, and the electrolyte of being delivered to by electrolyte circulating pump 5 is carried out to heat exchange, makes electrolyte temperature be reduced to design temperature, then electrolyte is exported and is back in housing.
Electrolyte conduit 7 in the various embodiments described above can be selected the conventional electrolyte conduit in this area, as electrolyte microtubular.
From the above, above-mentioned electrokinetic cell adopts the electrokinetic cell lug of above-mentioned hollow cylinder, the electrolyte of this electrokinetic cell is circulated by the hollow pipeline of battery pole ear, can effectively lead walking power inside battery air pressure, effectively adjusted the pressure stability of electrokinetic cell inside.The electrolyte circulating is taken away heat in time, has kept the constant of electrokinetic cell internal temperature, has effectively controlled cell integrated problem, has improved the usage safety performance of electrokinetic cell.Make this electrokinetic cell under the conditions such as severe cold weather, can also battery temperature be returned to by the circulation of electrolyte to the optimum working temperature scope of electrokinetic cell from lower temperature, widen the operating temperature range of electrokinetic cell, the capacity performance that has improved electrokinetic cell, has increased the security performance in wide temperature range.In addition, the electrokinetic cell lug of this employing hollow cylinder, has avoided independent safe explosion-proof device is set, and has reduced the production cost of this electrokinetic cell.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (9)

1. an electrokinetic cell lug, is characterized in that: the conducting post that described electrokinetic cell lug is hollow.
2. electrokinetic cell lug according to claim 1, is characterized in that: the hollow cavity diameter of described conducting post is 0.1～10mm.
3. electrokinetic cell lug according to claim 1 and 2, is characterized in that: the cross section of described conducting post is hollow circle, square or polygon.
4. electrokinetic cell lug according to claim 1 and 2, is characterized in that: the material of described conducting post is copper, aluminium or alloy.
5. electrokinetic cell lug according to claim 1 and 2, is characterized in that: an end endcapped of described cylinder, is offering the hole for electrolyte microtubular is set near in the hollow side wall of described closed end.
6. an electrokinetic cell, the anode ear and the negative electrode lug that comprise housing, be arranged on battery core in housing and electrolyte and be electrically connected with battery core, is characterized in that: also comprise the electrolyte circulating pump and the electrolyte constant temperature system that are arranged on outside described housing; Described anode ear and negative electrode lug are the electrokinetic cell lug described in claim 1～4 any one, all stretch out outside described housing its one end, and the end of stretching out outside housing of the arbitrary lug in described anode ear, negative electrode lug is connected by electrolyte conduit successively with the end of stretching out outside housing of electrolyte circulating pump, electrolyte constant temperature system and another lug, form circulate electrolyte passage.
7. electrokinetic cell according to claim 6, it is characterized in that: the end tip that described anode ear and negative electrode lug stretch out outside described housing is all sealed, all offering the hole for electrolyte microtubular is set near in the hollow side wall of described closed end, the openend of described anode ear and negative electrode lug cylinder is all electrically connected with battery core, and the hole of described anode ear or negative electrode lug is connected with the inlet opening of described electrolyte circulating pump by electrolyte conduit or the liquid outlet of electrolyte constant temperature system connects.
8. electrokinetic cell according to claim 6, it is characterized in that: described anode ear stretches out the end tip sealing outside described housing, offering for electrolyte microtubular hole is set near in the hollow side wall of described closed end, the openend of described anode ear is electrically connected with battery core, and the electrolyte microtubular hole of described anode ear is connected with the inlet opening of described electrolyte circulating pump by electrolyte conduit or the liquid outlet of electrolyte constant temperature system connects.
9. electrokinetic cell according to claim 6, it is characterized in that: described negative electrode lug stretches out the end tip sealing outside described housing, offering for electrolyte microtubular hole is set near in the hollow side wall of described closed end, the openend of described negative electrode lug is electrically connected with battery core, and the electrolyte microtubular hole of described negative electrode lug is connected with the inlet opening of described electrolyte circulating pump by electrolyte conduit or the liquid outlet of electrolyte constant temperature system connects.
CN201210504992.2A 2012-11-30 2012-11-30 Power battery pole ears and power battery Pending CN103855355A (en)

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CN110571435A (en) * 2017-06-28 2019-12-13 湖南妙盛汽车电源有限公司 Lithium ion power battery
CN109301376A (en) * 2017-07-25 2019-02-01 比亚迪股份有限公司 Cell apparatus
CN109301377A (en) * 2017-07-25 2019-02-01 比亚迪股份有限公司 Cell apparatus and base station with it
CN109103502A (en) * 2018-07-03 2018-12-28 东莞塔菲尔新能源科技有限公司 A method of correcting the dislocation of power battery electrode ear winding
CN109585958A (en) * 2018-11-30 2019-04-05 清华大学 Li-ion batteries piles thermal runaway processing system and method
CN112599941A (en) * 2020-12-21 2021-04-02 常德中科多源电力融合技术研究院 Electrolyte flowing type lithium ion battery system
CN112599941B (en) * 2020-12-21 2023-06-02 常德中科多源电力融合技术研究院 Electrolyte flow type lithium ion battery system

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Application publication date: 20140611