CN103165851B - Battery terminal, battery cover board assembly, cell and battery pack - Google Patents
Battery terminal, battery cover board assembly, cell and battery pack Download PDFInfo
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- CN103165851B CN103165851B CN201210300415.1A CN201210300415A CN103165851B CN 103165851 B CN103165851 B CN 103165851B CN 201210300415 A CN201210300415 A CN 201210300415A CN 103165851 B CN103165851 B CN 103165851B
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- battery
- subsegment
- cover board
- outer end
- battery terminal
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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
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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
- 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 discloses a kind of battery terminal, battery cover board assembly, cell and battery pack.Described battery terminal comprises: outer end subsegment, and described outer end subsegment is made up of the first electric conducting material; Inner subsegment, the upper end of described inner subsegment is connected from the lower end of described outer end subsegment and is made up of the second electric conducting material different with described first electric conducting material; And guard member, the connecting portion between the coated described inner subsegment of described guard member and described outer end subsegment.By utilizing the battery terminal according to the embodiment of the present invention, not only more adjacent cell can be linked together, and useful life and the performance of the battery pack be made up of multiple cell can be improved.
Description
Technical field
The invention belongs to field of batteries, particularly relate to a kind of battery terminal, battery cover board assembly, cell and battery pack.
Background technology
Power battery pack is the power source of electric automobile, because environment for use is severe, therefore higher to the requirement of the security performance of power battery pack.Power battery pack is formed by connecting by multiple cell.Traditionally, adopt the mode of brace to connect between multiple cell, there is impact for the reliability of power battery pack in the connection reliability between cell, being connected with therefore between cell is to be modified.
Summary of the invention
The application proposes following problem and true discovery and understanding based on inventor: traditional brace is made up of fine copper, the positive battery terminal of cell is made up of fine aluminium, negative battery terminal is made up of fine copper, therefore, just occur that in cell junction copper piece (cell connector) is directly connected with aluminum component (positive battery terminal), the aerial moisture of contact-making surface of copper piece and aluminum component, very easily electrolyte is formed under the effect of carbon dioxide and other impurity, thus to be formed in the junction of brace and battery terminal with aluminum component be negative pole, copper piece is the primary cell of positive pole, produce couple corrosion, the contact resistance of copper piece and aluminum component junction is caused to increase.In addition, because the modulus of elasticity of copper piece and aluminum component and thermal coefficient of expansion differ greatly, at cell after repeatedly energising with the cold cycling of power-off, the junction between copper piece with aluminum component produces larger gap and affects and contact, and further increases contact resistance.Contact resistance increases, and temperature can be caused to raise.Under high temperature, corrosion oxidation aggravation, produces vicious circle, connection reliability is reduced, and the too high meeting of temperature of connecting portion causes smoldering, brace ruptures, and affects life-span and the performance of battery pack.
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.
For this reason, one object of the present invention is to propose a kind of battery terminal, and this battery terminal can be avoided galvano-cautery occurs, and prevents contact resistance from increasing, and improves connection reliability.
Another object of the present invention is to propose a kind of battery cover board assembly with described battery terminal.
Another object of the present invention is to propose a kind of cell with described battery cover board assembly.
Another object of the present invention is to propose a kind of battery pack with described battery terminal.
To achieve these goals, embodiment according to a first aspect of the present invention proposes a kind of battery terminal, and described battery terminal comprises: outer end subsegment, and described outer end subsegment is made up of the first electric conducting material; Inner subsegment, the upper end of described inner subsegment is connected from the lower end of described outer end subsegment and is made up of the second electric conducting material different with described first electric conducting material; And guard member, the connecting portion between the coated described inner subsegment of described guard member and described outer end subsegment.
According to the battery terminal of the embodiment of the present invention, because the outer end subsegment of described battery terminal is made up of described first electric conducting material, when connecting cell, the outer end subsegment be made up of described first electric conducting material of the first battery terminal of one end of a battery connecting piece and a described cell and in the second battery terminal can be connected and first battery terminal be made up of described first electric conducting material of the other end of this battery connecting piece and cell described in another is connected with another in the second battery terminal, thus another contact-making surface (junction) in the contact-making surface (junction) of the outer end subsegment of in described battery connecting piece and described first battery terminal and described second battery terminal and described battery connecting piece and described first battery terminal and described second battery terminal can not aerial moisture, electrolyte is formed under the effect of carbon dioxide and other impurity, therefore, primary cell can not be formed in above-mentioned junction, avoid thus producing couple corrosion, and the contact resistance of above-mentioned junction can be avoided to increase.
Because another in the outer end subsegment of in described battery connecting piece, described first battery terminal and described second battery terminal and described first battery terminal and described second battery terminal is all made up of described first electric conducting material, therefore described battery connecting piece is equal with thermal coefficient of expansion with the modulus of elasticity of the outer end subsegment of in described first battery terminal and described second battery terminal and described battery connecting piece is equal with thermal coefficient of expansion with another the modulus of elasticity in described first battery terminal and described second battery terminal.Like this at described cell after repeatedly energising with the cold cycling of power-off, all can not produce gap between another between the outer end subsegment of in described battery connecting piece and described first battery terminal and described second battery terminal and in described battery connecting piece and described first battery terminal and described second battery terminal, thus avoid the contact resistance of another the junction in the contact resistance of the junction of the outer end subsegment of in described battery connecting piece and described first battery terminal and described second battery terminal and described battery connecting piece and described first battery terminal and described second battery terminal to increase.
Therefore, utilize the battery terminal according to the embodiment of the present invention, can avoid because contact resistance increases and cause the temperature of the junction of described battery connecting piece and described cell to raise, thus not only can be linked together by more adjacent described cell, and useful life and the performance of the battery pack be made up of multiple described cell can be improved.
Be understandable that, described inner subsegment and described outer end subsegment are made up of different electric conducting materials, easily form electrolyte under the effect of the aerial moisture of connecting portion, carbon dioxide and other impurity therefore between described inner subsegment and described outer end subsegment, thus cause the connecting portion between described inner subsegment and described outer end subsegment to produce couple corrosion.According to the battery terminal of the embodiment of the present invention; due to the connecting portion between the coated described inner subsegment of described guard member and described outer end subsegment; the connecting portion between described inner subsegment and described outer end subsegment can be made to avoid contacting with other impurity with the moisture in air, carbon dioxide; prevent the connecting portion between described inner subsegment and described outer end subsegment from producing couple corrosion; improve the life-span of described cell, improve the reliability connected between described cell.
In one embodiment of the invention, described guard member is the protective layer formed by injection moulding, spraying or plating.Described guard member has the advantages such as easily manufactured, low cost of manufacture thus.
In one embodiment of the invention, described guard member is made up of one or more in polytetrafluoroethylene alkoxy resin, polypropylene, polyphenylene sulfide, polytetrafluoroethylene, Kynoar and polyphenylene oxide.
Not only can reduce the manufacturing cost of described guard member thus further; and the protected effect of described guard member can be improved further, described guard member still can protect the connecting portion between described inner subsegment and described outer end subsegment effectively after long-term use.
In one embodiment of the invention, described guard member is made up of polypropylene, polyphenylene sulfide or polyphenylene oxide.Not only can reduce the manufacturing cost of described guard member thus further; and the protected effect of described guard member can be improved further, described guard member still can protect the connecting portion between described inner subsegment and described outer end subsegment effectively after long-term use.
In one embodiment of the invention, described inner subsegment and described outer end subsegment are by weld or tenon groove structure is connected.Described inner subsegment and described outer end subsegment not only can be made thus to link together more securely, and manufacture difficulty and the manufacturing cost of described battery terminal can be reduced.
In one embodiment of the invention, another in one in described inner subsegment and described outer end subsegment made of aluminum and described inner subsegment and described outer end subsegment is made of copper.
In one embodiment of the invention, the upper end of described outer end subsegment is provided with connection boss.By arranging described connection boss on the upper end of described outer end subsegment, described outer end subsegment can be made to be connected with described battery connecting piece more easily, firmly.
In one embodiment of the invention, described battery terminal has circular cross section.Thus, described battery terminal can coordinate with described cover plate more easily.
Embodiment according to a second aspect of the present invention proposes a kind of battery cover board assembly, and described battery cover board assembly comprises: battery terminal, and described battery terminal is battery terminal described according to a first aspect of the present invention; Cover plate, described cover plate is set in outside described battery terminal; And insulating part, described insulating part is located between described cover plate and described battery terminal.
According to the battery cover board assembly of the embodiment of the present invention, owing to being provided with battery terminal described according to a first aspect of the present invention, therefore the temperature of the junction of the cell causing battery connecting piece because contact resistance increases and have described battery cover board assembly can be avoided to raise, thus not only can be linked together by more adjacent described cell, and useful life and the performance of the battery pack be made up of multiple described cell can be improved.And, by utilizing the battery cover board assembly according to the embodiment of the present invention, the life-span of described cell can be improved, and improve the reliability connected between described cell.
In one embodiment of the invention, the connecting portion of described inner subsegment and described outer end subsegment is higher than the upper surface of described cover plate and described insulating part.
The connecting portion of described inner subsegment and described outer end subsegment can be made thus as far as possible away from the electrolyte in described cell, avoid described battery terminal and described battery core body to produce galvano-cautery.
In one embodiment of the invention, described cover plate, insulating part and described battery terminal are combined by Shooting Technique.Manufacture difficulty and the manufacturing cost of described battery cover board assembly can be reduced thus.
In one embodiment of the invention, the lower end of described inner subsegment is provided with the 3rd flange, and wherein said cover plate comprises: first portion; With the first flange part, described first flange part is formed in the lower end in described first portion, and wherein said insulating part comprises: second portion, and described second portion is set on described battery terminal and described first portion and is set in described second portion; With the second flange part, described first flange part is located between described 3rd flange and described first flange part.Described battery cover board assembly has the advantages such as structure is simple, Stability Analysis of Structures thus.
In one embodiment of the invention, described first flange part is greater than the radial dimension of described second flange part and described 3rd flange and the radial dimension of described second flange part is greater than the radial dimension of described 3rd flange.
Described insulating part can be made thus described battery terminal and described cover plate to be completely cut off better open, make the performance of described cell more stable.
In one embodiment of the invention, described second portion to be set in described inner subsegment and predetermined length is stretched out from the upper end in described second portion in the upper end of described inner subsegment.
Described inner subsegment not only can be made thus to be connected more easily with described outer end subsegment, and on the connecting portion that described guard member can be made to be coated on more easily between described inner subsegment and described outer end subsegment.
In one embodiment of the invention, the periphery wall of described inner subsegment is provided with circumferential recess, and described second portion is engaged in described circumferential recess.Described second portion can be made thus to be connected with described inner subsegment more easily, firmly.
In one embodiment of the invention, described insulating part also comprises the 3rd portion, described 3rd portion is set in described first portion, and the upper end in described 3rd portion is connected to close described first portion with the upper end in described second portion and between described second and the 3rd portion the upper end in gap.
Described insulating part can be made thus described battery terminal and described cover plate to be completely cut off better open, make the performance of described cell more stable.
Embodiment according to a third aspect of the present invention proposes a kind of cell, and described cell comprises: battery container; Battery core body, described battery core body is located in described battery container; Battery cover board assembly, described battery cover board assembly is arranged on to close described battery container on described battery container, and described battery cover board assembly is battery cover board assembly described according to a second aspect of the present invention.
According to the cell of the embodiment of the present invention, owing to being provided with battery cover board assembly described according to a second aspect of the present invention, therefore there is the advantage such as stable performance, long service life.And, can reliably connect between described cell.
Embodiment according to a fourth aspect of the present invention proposes a kind of battery pack, described battery pack comprises: multiple cell, described cell has reciprocal first and second battery terminals of polarity, one in described first and second battery terminals is battery terminal described according to a first aspect of the present invention, and another in described first and second battery terminals is made up of described first electric conducting material; And battery connecting piece, described battery connecting piece is made up of described first electric conducting material, one end of described battery connecting piece is connected with first battery terminal of in neighboring unit cell, and the other end of described battery connecting piece is connected with another the second battery terminal in neighboring unit cell.
There is according to the battery pack of the embodiment of the present invention advantages such as Stability Analysis of Structures, stable performance, long service life.
In one embodiment of the invention, described battery connecting piece and described first and second battery terminals are by riveting, being threaded or welding manner is connected.
Described battery connecting piece and described first battery terminal and described second battery terminal not only can be made thus to link together more securely, and manufacture difficulty and the manufacturing cost of described battery pack can be reduced.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of the battery cover board assembly according to the embodiment of the present invention; With
Fig. 2 is the schematic diagram of the battery pack according to the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
Present inventor finds and recognizes after in depth research: traditional brace is made up of fine copper, and the positive battery terminal of cell is made up of fine aluminium, and negative battery terminal is made up of fine copper.Because copper piece (cell connector) is directly connected with aluminum component (positive battery terminal), very easily electrolyte is formed under the effect of the therefore aerial moisture of the contact-making surface of copper piece and aluminum component, carbon dioxide and other impurity, and produce couple corrosion, cause the contact resistance of copper piece and aluminum component junction to increase.In addition, in use for some time, junction between copper piece with aluminum component produces larger gap and affects and contact, and further increases contact resistance.Contact resistance increases, and temperature can be caused to raise.Under high temperature, corrosion oxidation aggravation, produces vicious circle, connection reliability is reduced, and the too high meeting of temperature of connecting portion causes smoldering, brace ruptures, and affects life-span and the performance of battery pack.
Referring to Fig. 2, the battery pack 1 according to the embodiment of the present invention is described.As shown in Figure 2, battery connecting piece 20 and multiple cell 10 is comprised according to the battery pack 1 of the embodiment of the present invention.
Cell 10 has reciprocal first battery terminal 11 and the second battery terminal 12 of polarity.In other words, the polarity of the first battery terminal 11 is contrary with the polarity of the second battery terminal 12.One in first battery terminal 11 and the second battery terminal 12 is that another in battery terminal 110, first battery terminal 11 and the second battery terminal 12 described with reference to the following examples is made up of the first electric conducting material.
First with reference to Fig. 1, the battery terminal 110 according to the embodiment of the present invention is described.As shown in Figure 1, outer end subsegment 111, inner subsegment 112 and guard member 113 is comprised according to the battery terminal 110 of the embodiment of the present invention.
Outer end subsegment 111 is made up of the first electric conducting material, as shown in Figure 1, outer end subsegment 111 refers to the part of battery terminal 110 away from battery core body (not shown), inner subsegment 112 is parts of adjacent cells core body, as for the concrete length of outer end subsegment 111 and inner subsegment 112, can set according to specific needs.The upper end of inner subsegment 112 is connected from the lower end of outer end subsegment 111 and inner subsegment 112 is made up of the second electric conducting material different with described first electric conducting material.Connecting portion between the coated inner subsegment 112 of guard member 113 and outer end subsegment 111, certainly, guard member 113 also can the part of the above-mentioned connecting portion of vicinity of coated outer end subsegment 111 and/or inner subsegment 112.In the description of the embodiment of the present invention, shown in above-below direction arrow A as in Figure 1 and Figure 2.
Battery connecting piece 20 is made up of described first electric conducting material, first battery terminal 11 of one end 21 of battery connecting piece 20 and in neighboring unit cell 10 is connected, and the other end 22 of battery connecting piece 20 is connected with another the second battery terminal 12 in neighboring unit cell 10.
Be described for above-mentioned battery terminal 110 for the first battery terminal 11 below.The outer end subsegment 111 of first battery terminal 11 of one end 21 of a battery connecting piece 20 and in neighboring unit cell 10 is connected and the other end 22 of this battery connecting piece 20 is connected with another the second battery terminal 12 in neighboring unit cell 10 to make these two adjacent cells 10 connect.But be understandable that, can also comprise the cell 10 be connected in parallel to each other according to the battery pack 1 of the embodiment of the present invention, in other words, the cell 10 in battery pack 10 can be one another in series, or a part is one another in series, another part is in parallel.
According to the battery terminal 110 of the embodiment of the present invention, because the outer end subsegment 111 of battery terminal 110 is made up of described first electric conducting material, when connecting cell 10, one end 21 of a battery connecting piece 20 and the first battery terminal 11 of a cell 10 can be connected with the outer end subsegment 111 be made up of described first electric conducting material of in the second battery terminal 12 and first battery terminal 11 be made up of described first electric conducting material of the other end 22 of this battery connecting piece 20 and another cell 10 is connected with another in the second battery terminal 12, thus another contact-making surface in the contact-making surface of the outer end subsegment 111 of in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 and battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 can not aerial moisture, electrolyte is formed under the effect of carbon dioxide and other impurity.Therefore, another junction in the junction of the outer end subsegment 111 of in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 and battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 can not form primary cell, avoid thus producing couple corrosion, and the contact resistance of another the junction in the contact resistance of the junction of the outer end subsegment 111 of in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 and battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 can be avoided to increase.
And, because another in the outer end subsegment 111 of in battery connecting piece 20, first battery terminal 11 and the second battery terminal 12 and the first battery terminal 11 and the second battery terminal 12 is all made up of described first electric conducting material, therefore battery connecting piece 20 is equal with thermal coefficient of expansion with the modulus of elasticity of the outer end subsegment 111 of in the first battery terminal 11 and the second battery terminal 12 and battery connecting piece 20 is equal with thermal coefficient of expansion with another the modulus of elasticity in the first battery terminal 11 and the second battery terminal 12.Like this at cell 10 after repeatedly energising with the cold cycling of power-off, all can not produce gap between another between the outer end subsegment 111 of in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 and in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12, thus avoid the contact resistance of another the junction in the contact resistance of the junction of the outer end subsegment 111 of in battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 and battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 to increase.
Therefore, utilize the battery terminal 110 according to the embodiment of the present invention, can avoid causing battery connecting piece 20 to raise with the temperature of the junction of cell 10 because contact resistance increases, thus not only can be linked together by more adjacent cell 10, and useful life and the performance of the battery pack 1 be made up of multiple cell 10 can be improved.
Be understandable that, because inner subsegment 112 and outer end subsegment 111 are made up of different electric conducting materials, easily form electrolyte under the effect of the aerial moisture of connecting portion, carbon dioxide and other impurity therefore between inner subsegment 112 and outer end subsegment 111, thus cause the connecting portion between inner subsegment 112 and outer end subsegment 111 to produce couple corrosion.According to the battery terminal 110 of the embodiment of the present invention; due to the connecting portion between the coated inner subsegment 112 of guard member 113 and outer end subsegment 111; the connecting portion between inner subsegment 112 and outer end subsegment 111 can be made to avoid contacting with other impurity with the moisture in air, carbon dioxide; prevent the connecting portion between inner subsegment 112 and outer end subsegment 111 from producing couple corrosion; improve the life-span of cell 10, improve the reliability connected between cell 10.
Battery pack 10 according to the embodiment of the present invention has the advantages such as Stability Analysis of Structures, stable performance, long service life.
Advantageously, guard member 113 can be the protective layer formed by injection moulding, spraying or plating.Guard member 113 has the advantages such as easily manufactured, low cost of manufacture thus.
Particularly, guard member 113 can be made up of one or more in polytetrafluoroethylene alkoxy resin (PFA), polypropylene (PP), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), Kynoar (PVDF) and polyphenylene oxide (PPO).Not only can reduce the manufacturing cost of guard member 113 thus further, and can improve the protected effect of guard member 113 further, guard member 113 still can protect the connecting portion between inner subsegment 112 and outer end subsegment 111 effectively after long-term use.
Alternatively, guard member 113 can be made up of polypropylene, polyphenylene sulfide or polyphenylene oxide.Not only can reduce the manufacturing cost of guard member 113 thus further, and can improve the protected effect of guard member 113 further, guard member 113 still can protect the connecting portion between inner subsegment 112 and outer end subsegment 111 effectively after long-term use.In addition, guard member 113 can also be electrodeposited coating.Described electrodeposited coating can be electroless nickel layer or plating silver layer.
In some embodiments of the invention, inner subsegment 112 and in outer end subsegment 111 can made of aluminum and inner subsegment 112 can be made of copper with another in outer end subsegment 111.Be understandable that, in the description of the embodiment of the present invention, term " aluminium " comprises pure aluminum and its alloy, and term " copper " comprises pure copper and copper alloy.
Particularly, such as, when battery terminal 110 is positive battery terminal, inner subsegment 112 can made of aluminum and outer end subsegment 111 can be made of copper, now battery connecting piece 20 can be made of copper, and another in the first battery terminal 11 and the second battery terminal 12 also can be made of copper.When battery terminal 110 is negative battery terminal, inner subsegment 112 can be made of copper and outer end subsegment 111 can be made of aluminum, now battery connecting piece 20 can be made of aluminum, and another in the first battery terminal 11 and the second battery terminal 12 also can be made of aluminum.
As shown in Figure 1, in an example of the present invention, battery terminal 110 can have circular cross section.In other words, inner subsegment 112 can have circular cross section and outer end subsegment 111 also can have circular cross section.That is, battery terminal 110 can be cylindric, and inner subsegment 112 can be cylindric and outer end subsegment 111 also can be cylindric.Thus, battery terminal 110 can coordinate with cover plate 120 more easily.
Alternatively, battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 can by riveting, screw, to be threaded or welding manner is connected.Battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 not only can be made thus to link together more securely, and manufacture difficulty and the manufacturing cost of battery pack 1 can be reduced.Advantageously, battery connecting piece 20 can be connected by welding manner with the second battery terminal 12 with the first battery terminal 11, effectively can reduce the contact internal resistance of battery connecting piece 20 and the first battery terminal 11 and the contact internal resistance of battery connecting piece 20 and the second battery terminal 12 thus.Such as, battery connecting piece 20 and the first battery terminal 11 and the second battery terminal 12 can be linked together by modes such as explosive welding (EW), friction welding (FW), solderings.
In one embodiment of the invention, inner subsegment 112 can weld together with outer end subsegment 111.Inner subsegment 112 and outer end subsegment 111 not only can be made thus to link together more securely, and manufacture difficulty and the manufacturing cost of battery terminal 110 can be reduced.Particularly, inner subsegment 112 can be linked together by modes such as explosive welding (EW), friction welding (FW), solderings with outer end subsegment 111.
In addition, inner subsegment 112 can also be connected by tenon groove structure with outer end subsegment 111.Inner subsegment 112 can be made thus to link together more easily with outer end subsegment 111.
The compositely proportional of inner subsegment 112 and outer end subsegment 111 can be selected according to the actual needs of battery terminal 110.Particularly, if when battery terminal 110 is positive battery terminal, the ratio of inner subsegment 112 will relatively increase and the ratio of outer end subsegment 111 will reduce relatively.If when battery terminal 110 is negative battery terminal, the ratio of inner subsegment 112 will relatively reduce and the ratio of outer end subsegment 111 will increase relatively.In addition, the compositely proportional of inner subsegment 112 and outer end subsegment 111 can also be adjusted according to the real needs of cell 10 pairs of battery terminals 110.Such as, when requiring relatively large to the conductance current of battery terminal 110, the ratio shared by outer end subsegment 111 can be increased and reduce the ratio shared by inner subsegment 112.
As shown in Figure 1, in a concrete example of the present invention, the upper end of outer end subsegment 111 can be provided with and connect boss 1111.Connecting boss 1111 by arranging on the upper end of external terminal section 111, outer end subsegment 111 can be made to be connected with battery connecting piece 20 more easily, firmly.Advantageously, connecting boss 1111 can have circular cross section, and it can be cylindric for namely connecting boss 1111.Connecting boss 1111 can be welded on the upper end of outer end subsegment 111, and connecting boss 1111 can also be integrally formed with outer end subsegment 111.
Referring to Fig. 2, the cell 10 according to the embodiment of the present invention is described.As shown in Figure 2, battery container 200, battery core body (not shown) and battery cover board assembly 100 is comprised according to the cell 10 of the embodiment of the present invention.Described battery core body is located in battery container 200.
With reference to Fig. 1, the battery cover board assembly 100 according to the embodiment of the present invention is described.As shown in Figure 1, battery terminal, cover plate 120 and insulating part 130 is comprised according to the battery cover board assembly 100 of the embodiment of the present invention.Described battery terminal is the battery terminal 110 according to above-described embodiment, and cover plate 120 is set in outside battery terminal 110.Insulating part 130 is located between cover plate 120 and battery terminal 110.
Wherein, battery cover board assembly 100 is arranged on battery container 200 with closing battery housing 200.In the battery cover board assembly 100 shown in Fig. 1, show a battery terminal 110, on understandable, battery cover board assembly 100 can have two battery terminals 110, in other words, two battery terminals of the cell of battery cover board assembly 100 are used to be positioned at the same side, alternatively, cell can use two battery cover board assemblies 100, each battery cover board assembly 100 has a battery terminal 110, the battery terminal 110 of a battery cover board assembly 100 can be used as positive terminal, and another is used as negative terminal.
According to the battery cover board assembly 100 of the embodiment of the present invention, owing to having the battery terminal 110 according to above-described embodiment, therefore the temperature of the junction of the cell 10 causing battery connecting piece 20 because contact resistance increases and have battery cover board assembly 100 can be avoided to raise, thus not only can be linked together by more adjacent cell 10, and useful life and the performance of the battery pack 1 be made up of multiple cell 10 can be improved.And, by utilizing the battery cover board assembly 100 according to the embodiment of the present invention, the life-span of cell 10 can be improved, and improve the reliability connected between cell 10.
According to the cell 10 of the embodiment of the present invention, owing to having the battery cover board assembly 100 of the battery terminal 110 comprised according to above-described embodiment, therefore there is the advantage such as stable performance, long service life.And, can reliably connect between cell 10.
As shown in Figure 1, in some embodiments of the invention, the connecting portion of inner subsegment 112 and outer end subsegment 111 can higher than the upper surface of cover plate 120 and insulating part 130.Inner subsegment 112 can be made thus to try one's best away from the electrolyte in cell 10 with the connecting portion of outer end subsegment 111, avoid battery terminal 110 and described battery core body to produce galvano-cautery.
Advantageously, cover plate 120, insulating part 130 and battery terminal 110 can be combined by Shooting Technique.Manufacture difficulty and the manufacturing cost of battery cover board assembly 100 can be reduced thus.In addition, cover plate 120, insulating part 130 and battery terminal 110 can also be combined by screw thread, rivet, the mode such as bonding combines.
As shown in Figure 1, in examples more of the present invention, the lower end of inner subsegment 112 can be provided with the 3rd flange 1121, and its cover plate 120 can comprise the lower end that first portion 121 and the first flange part 122, first flange part 122 can be formed in first portion 121.Insulating part 130 can comprise second portion 131 and the second flange part 132, second portion 131 can be set on battery terminal 110 and first portion 121 can be set in second portion 131, and the second flange part 132 can be located between the 3rd flange 1121 and the first flange part 122.In other words, inner subsegment 112 can be located in second portion 131 and second portion 131 and can be located in first portion 121.Battery cover board assembly 100 has the advantages such as structure is simple, Stability Analysis of Structures thus.
Advantageously, each in first portion 121 and second portion 131 can have circular cross section, and each in the first flange part 122 and the second flange part 132 can have circular cylindrical cross-section.
As shown in Figure 1, in an example of the present invention, the first flange part 122 can be greater than the radial dimension of the second flange part 132 and the 3rd flange 1121 and the radial dimension of the second flange part 132 can be greater than the radial dimension of the 3rd flange 1121.In other words, the second flange part 132 outer can the outer of inner subsegment 112, three flange 1121 more more contiguous than the outer of the first flange part 122 can inner subsegment 112 more more contiguous than the outer of the second flange part 132.Insulating part 130 can be made thus battery terminal 110 and cover plate 120 to be completely cut off better open, make the performance of cell 10 more stable.
In a concrete example of the present invention, as shown in Figure 1, second portion 131 can be set in inner subsegment 112 and predetermined length can be stretched out from the upper end in second portion 131 in the upper end of inner subsegment 112.Inner subsegment 112 not only can be made thus to be connected more easily with outer end subsegment 111, and on the connecting portion that guard member 113 can be made to be coated on more easily between inner subsegment 112 and outer end subsegment 111.
As shown in Figure 1, advantageously, the periphery wall of inner subsegment 112 can be provided with circumferential recess, second portion 131 can be engaged in described circumferential recess.Second portion 131 can be made thus to be connected with inner subsegment 112 more easily, firmly.
In some embodiments of the invention, insulating part 130 can also comprise the 3rd portion 133,3rd portion 133 can be set in first portion 121, and the upper end in the 3rd portion 133 can be connected to close first portion 121 with the upper end in second portion 131 and between second portion 131 and the 3rd portion 133 upper end in gap.Insulating part 130 can be made thus battery terminal 110 and cover plate 120 to be completely cut off better open, make the performance of cell 10 more stable.
Alternatively, cover plate 120 can be made up of plastics, aluminium alloy or stainless steel etc., can reduce the manufacturing cost of cover plate 120 thus further.Insulating part 130 can be made up of one or more in polytetrafluoroethylene alkoxy resin (PFA), polypropylene (PP), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), Kynoar (PVDF) and polyphenylene oxide (PPO).Not only can reduce the manufacturing cost of insulating part 130 thus further, and the insulation effect of insulating part 130 can be improved further, insulating part 130 still can, effectively by battery terminal 110 with cover plate 120 is isolated opens, make the performance of cell 10 more stable after long-term use.
Advantageously, insulating part 130 can be made up of polytetrafluoroethylene alkoxy resin (PFA), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE) or polyphenylene oxide (PPO).Not only can reduce the manufacturing cost of insulating part 130 thus further, and the insulation effect of insulating part 130 can be improved further, insulating part 130 still can, effectively by battery terminal 110 with cover plate 120 is isolated opens, make the performance of cell 10 more stable after long-term use.
By utilizing the battery terminal 110 according to the embodiment of the present invention, not only more adjacent cell 10 can be linked together, and useful life and the performance of the battery pack 1 be made up of multiple cell 10 can be improved.
In the description of this specification, specific features, structure, electric conducting material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, electric conducting material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (18)
1. a battery cover board assembly, is characterized in that, comprising:
Battery terminal, described battery terminal comprises:
Outer end subsegment, described outer end subsegment is made up of the first electric conducting material;
Inner subsegment, the upper end of described inner subsegment is connected from the lower end of described outer end subsegment and is made up of the second electric conducting material different with described first electric conducting material; With
Guard member, the connecting portion between the coated described inner subsegment of described guard member and described outer end subsegment;
Cover plate, described cover plate is set in outside described battery terminal, and described cover plate comprises:
First portion; With
First flange part, described first flange part is formed in the lower end in described first portion; And
Insulating part, described insulating part is located between described cover plate and described battery terminal, and described insulating part comprises:
Second portion, described second portion is set on described battery terminal and described first portion and is set in described second portion; With
Second flange part, described second flange part is located at the below of described first flange part.
2. battery cover board assembly according to claim 1, is characterized in that, described guard member is the protective layer formed by injection moulding, spraying or plating.
3. battery cover board assembly according to claim 1, is characterized in that, described guard member is made up of one or more in polytetrafluoroethylene alkoxy resin, polypropylene, polyphenylene sulfide, polytetrafluoroethylene, Kynoar and polyphenylene oxide.
4. battery cover board assembly according to claim 3, is characterized in that, described guard member is made up of polypropylene, polyphenylene sulfide or polyphenylene oxide.
5. battery cover board assembly according to claim 1, is characterized in that, described inner subsegment and described outer end subsegment are by weld or tenon groove structure is connected.
6. battery cover board assembly according to claim 1, is characterized in that, another in one in described inner subsegment and described outer end subsegment made of aluminum and described inner subsegment and described outer end subsegment is made of copper.
7. battery cover board assembly according to claim 1, is characterized in that, the upper end of described outer end subsegment is provided with connection boss.
8. battery cover board assembly according to claim 1, is characterized in that, described battery terminal has circular cross section.
9. battery cover board assembly according to claim 1, is characterized in that, the connecting portion of described inner subsegment and described outer end subsegment is higher than the upper surface of described cover plate and described insulating part.
10. battery cover board assembly according to claim 1, is characterized in that, described cover plate, insulating part and described battery terminal are combined by Shooting Technique.
11. battery cover board assemblies according to claim 1, is characterized in that, the lower end of described inner subsegment is provided with the 3rd flange, and described second flange part is located between described 3rd flange and described first flange part.
12. battery cover board assemblies according to claim 11, is characterized in that, described first flange part is greater than the radial dimension of described second flange part and described 3rd flange and the radial dimension of described second flange part is greater than the radial dimension of described 3rd flange.
13. battery cover board assemblies according to claim 1, is characterized in that, described second portion is set in described inner subsegment and predetermined length is stretched out from the upper end in described second portion in the upper end of described inner subsegment.
14. battery cover board assemblies according to claim 13, is characterized in that, the periphery wall of described inner subsegment is provided with circumferential recess, and described second portion is engaged in described circumferential recess.
15. battery cover board assemblies according to any one of claim 1-14, it is characterized in that, described insulating part also comprises the 3rd portion, described 3rd portion is set in described first portion, and the upper end in described 3rd portion is connected to close described first portion with the upper end in described second portion and between described second and the 3rd portion the upper end in gap.
16. 1 kinds of cells, is characterized in that, comprising:
Battery container;
Battery core body, described battery core body is located in described battery container;
Battery cover board assembly, described battery cover board assembly is arranged on described battery container to close described battery container, the battery cover board assembly of described battery cover board assembly according to any one of claim 1-15.
17. 1 kinds of battery pack, is characterized in that, comprising:
Multiple cell, described cell is cell according to claim 16, described cell has reciprocal first and second battery terminals of polarity, one in described first and second battery terminals comprises outer end subsegment, inner subsegment and guard member, described outer end subsegment is made up of the first electric conducting material, the upper end of described inner subsegment is connected from the lower end of described outer end subsegment and is made up of the second electric conducting material different with described first electric conducting material, connecting portion between the coated described inner subsegment of described guard member and described outer end subsegment, another in described first and second battery terminals is made up of described first electric conducting material, with
Battery connecting piece, described battery connecting piece is made up of described first electric conducting material, one end of described battery connecting piece is connected with first battery terminal of in neighboring unit cell, and the other end of described battery connecting piece is connected with another the second battery terminal in neighboring unit cell.
18. battery pack according to claim 17, is characterized in that, described battery connecting piece and described first and second battery terminals are by riveting, being threaded or welding manner is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300415.1A CN103165851B (en) | 2011-12-14 | 2012-08-22 | Battery terminal, battery cover board assembly, cell and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110416275 | 2011-12-14 | ||
| CN201110416275X | 2011-12-14 | ||
| CN201110416275.X | 2011-12-14 | ||
| CN201210300415.1A CN103165851B (en) | 2011-12-14 | 2012-08-22 | Battery terminal, battery cover board assembly, cell and battery pack |
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| CN103165851A CN103165851A (en) | 2013-06-19 |
| CN103165851B true CN103165851B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210299849.4A Active CN103165844B (en) | 2011-12-14 | 2012-08-22 | Battery connecting piece and the series of cells with this battery connecting piece |
| CN201210300415.1A Active CN103165851B (en) | 2011-12-14 | 2012-08-22 | Battery terminal, battery cover board assembly, cell and battery pack |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210299849.4A Active CN103165844B (en) | 2011-12-14 | 2012-08-22 | Battery connecting piece and the series of cells with this battery connecting piece |
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| CN103456914B (en) * | 2013-09-02 | 2016-05-18 | 徐敖奎 | The battery of safe breaking device is welded and had to a kind of convenience |
| DE102014210327A1 (en) * | 2014-06-02 | 2015-12-03 | Robert Bosch Gmbh | Electric cell connector for a battery module |
| CN105428583B (en) * | 2014-09-12 | 2019-08-02 | 北京普莱德新能源电池科技有限公司 | A kind of power battery welding structure and welding method in groups |
| CN109273660B (en) * | 2017-07-17 | 2021-06-25 | 宁德时代新能源科技股份有限公司 | Power battery top cover assembly, power battery and battery module |
| JP7041487B2 (en) * | 2017-10-17 | 2022-03-24 | 株式会社Ｇｓユアサ | Power storage element |
| CN108258179A (en) * | 2018-03-22 | 2018-07-06 | 华霆（合肥）动力技术有限公司 | battery pack and electric vehicle |
| CN114211683B (en) * | 2021-10-28 | 2022-10-14 | 荣耀终端有限公司 | Display device, mold, injection molding system and method for manufacturing battery cover of injection molding system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103165844A (en) | 2013-06-19 |
| CN103165851A (en) | 2013-06-19 |
| CN103165844B (en) | 2016-06-01 |
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