CN102208594A - Secondary battery - Google Patents
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- CN102208594A CN102208594A CN2011100837012A CN201110083701A CN102208594A CN 102208594 A CN102208594 A CN 102208594A CN 2011100837012 A CN2011100837012 A CN 2011100837012A CN 201110083701 A CN201110083701 A CN 201110083701A CN 102208594 A CN102208594 A CN 102208594A
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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
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Abstract
一种二次电池包括：电极组件，所述电极组件包括第一电极板、第二电极板以及在所述第一电极板和所述第二电极板之间的隔板；容纳所述电极组件的壳体；电连接到所述第一电极板的电极端子；联接在所述第一电极板和所述电极端子之间并电连接所述第一电极板和所述电极端子的集流体，所述集流体包括熔丝部分；以及在所述集流体的所述熔丝部分上的绝缘单元。
A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; housing the electrode assembly a housing; an electrode terminal electrically connected to the first electrode plate; a current collector coupled between the first electrode plate and the electrode terminal and electrically connecting the first electrode plate and the electrode terminal, The current collector includes a fuse part; and an insulating unit on the fuse part of the current collector.
Description
Technical field
The each side of various embodiments of the present invention relates to a kind of secondary cell, more specifically, relates to a kind of when because the secondary cell that overcharges or be protected by fuse is worked during overcurrent flows that anomaly causes.
Background technology
Different with the primary cell of rechargeable not, secondary cell is a rechargeable battery.Secondary cell extensively is used in the high-tech electronics equipment such as cell phone, notebook computer and camcorder, and is used in the vehicle.
Secondary cell comprises electrode assemblie and electrolyte.Electrode assemblie comprises positive electrode plate and negative electrode plate and dividing plate.Electrolyte comprises lithium (Li) ion under many circumstances.The positive electrode plate of electrode assemblie and negative electrode plate can comprise outwardly directed electrode tabs.
Electrode assemblie can be accommodated in the housing, and electrode terminal can be exposed to outside.Electrode tabs is extended to the electrode assemblie outside, to be electrically connected to electrode terminal.Housing can have cylinder form or rectangular shape.
Summary of the invention
According to the one side of various embodiments of the present invention, even a kind of secondary cell can be when owing to overcharge or also prevent or prevent substantially blast during overcurrent flows that anomaly causes.
According to one embodiment of the invention, a kind of secondary cell comprises: electrode assemblie, described electrode assemblie comprise first battery lead plate, second battery lead plate and the dividing plate between described first battery lead plate and described second battery lead plate; The housing that holds described electrode assemblie; Be electrically connected to the electrode terminal of described first battery lead plate; Be connected between described first battery lead plate and the described electrode terminal and be electrically connected the collector of described first battery lead plate and described electrode terminal, described collector comprises the fuse part; And the insulation unit on the described fuse part of described collector.
In one embodiment, described insulation unit has than the big surface of described fuse part.In one embodiment, described fuse partly has the cross-sectional area littler than other parts of described collector.Described fuse part can have the resistance higher than other parts of described collector.
In one embodiment, described electrode terminal reaches described outside.In one embodiment, described secondary cell further comprises the cover plate of the opening that seals described housing, and wherein said electrode terminal passes the terminal hole that is formed in the described cover plate and stretches out.
Described insulation unit can comprise at least one in insulating tape and the insulator die goods.Described collector can form single single piece.
In one embodiment, described collector comprises: the collector plate that is connected to described first battery lead plate; With the lead member that is connected to described electrode terminal and described collector plate.Described lead member can comprise: the terminal lead unit that is connected to described electrode terminal; With the afflux lead wire unit of extending and being connected to described collector plate from described terminal lead unit.In one embodiment, described afflux lead wire unit comprises described fuse part.In one embodiment, described terminal lead unit comprises described fuse part.Described fuse part can be integrally formed on the described lead member, and can have the cross-sectional area littler than other parts of described lead member.
In one embodiment, described electrode terminal is first electrode terminal, and described secondary cell further comprises second electrode terminal that is electrically connected to described second battery lead plate and reaches described outside; And described collector is first collector, and described secondary cell further comprises second collector that is connected between described second battery lead plate and described second electrode terminal and is electrically connected described second battery lead plate and described second electrode terminal.In one embodiment, described first battery lead plate is a positive electrode plate, and described first collector is a positive electrode current collector, and described second battery lead plate is negative electrode plate, and described second collector is the negative electrode collector.In one embodiment, described first collector comprises aluminium, and described second collector comprises copper.
Described fuse part can be constructed to, and when equivalent value flowed through described collector more than or equal to the electric current of the value of setting electric current, described fuse part fractional melting also will described first battery lead plate and the disconnection of described electrode terminal.
Even when owing to overcharge or during overcurrent flows that anomaly causes, also can prevent or prevent substantially blast according to the secondary cell of one or more embodiment of the present invention.
Description of drawings
Describe exemplary embodiments more of the present invention in detail by the reference accompanying drawing, above and other feature and advantage will become more obvious for those of ordinary skills.The accompanying drawing example illustrates exemplary embodiments more of the present invention, and together is used to explain principle and further understanding of the invention is provided with text description.
Fig. 1 is the perspective view of secondary cell according to an embodiment of the invention.
Fig. 2 is the cutaway view of secondary cell of Fig. 1 of II-II along the line intercepting.
Fig. 3 is the partial, exploded perspective view of the secondary cell of Fig. 1, and it illustrates and comprises afflux lead wire unit and the lead member of separating with electrode assemblie, and fuse is formed in the afflux lead wire unit.
Fig. 4 is the cutaway view of secondary cell according to another embodiment of the present invention.
Fig. 5 is the partial, exploded perspective view of the secondary cell of Fig. 4, and it illustrates and comprises terminal lead unit and the lead member of separating with electrode assemblie, and fuse is formed in the terminal lead unit.
Fig. 6 is the cutaway view according to the secondary cell of an embodiment, and wherein first lead member of Fig. 2 directly contacts cover plate.
Fig. 7 is the cutaway view according to the secondary cell of an embodiment, and wherein first lead member of Fig. 4 directly contacts cover plate.
Embodiment
Now will with reference to accompanying drawing some exemplary embodiments be described more fully hereinafter; Yet various embodiments of the present invention can be implemented with different form, and should not be construed as limited to each exemplary embodiment of illustration and proposition here.But these exemplary embodiments are provided in the mode of example understands the present invention, and passes on scope of the present invention to those skilled in the art.
Fig. 1 is the perspective view of secondary cell 100 according to an embodiment of the invention.Fig. 2 is the cutaway view along the line II-II intercepting of the illustrative secondary cell 100 of Fig. 1.
See figures.1.and.2, secondary cell 100 comprises: electrode assemblie 10; First electrode terminal 21 and second electrode terminal 22; Cover plate 30; Housing 40; First collector 50 and second collector 60; Fuse 70; With insulation unit 80.In one embodiment, secondary cell 100 is rectangle lithium (Li) ion secondary battery.
In one embodiment, when owing to overcharge or during overcurrent flows that anomaly causes, fuse 70 works, to cut off electric current.In one embodiment, insulation unit 80 usefulness insulating material twine fuse 70, cut off fuse 70 is contacted electricity with any outside.In one example, insulation unit 80 has the surface bigger than fuse 70.
In one embodiment, electrode assemblie 10 forms by the form that first battery lead plate 11, dividing plate 13 and second battery lead plate 12 is wound into film.Yet various embodiments of the present invention are not limited thereto, and electrode assemblie 10 can for example form by alternately piling up first battery lead plate 11, dividing plate 13 and second battery lead plate 12.
In one embodiment, second battery lead plate 12 that exposes at the other end of electrode assemblie 10 of first collector 50 contact, first battery lead plate, 11, the second collectors, 60 contacts of exposing at an end of electrode assemblie 10.
In secondary cell 100, first battery lead plate 11 can be positive electrode plate, and second battery lead plate 12 can be negative electrode plate.In addition, in one embodiment, first collector 50 is a positive electrode current collector, and second collector 60 is the negative electrode collector.In addition, first electrode terminal 21 can be positive electrode terminal, and second electrode terminal 22 can be negative electrode terminal.
In one embodiment, first battery lead plate 11, first collector 50, first electrode terminal 21, second electrode terminal 22, second collector 60 and second battery lead plate 12 are electrically connected to form circuit.Here, if electric power is imported from external equipment by first electrode terminal 21 and second electrode terminal 22, then between first battery lead plate 11 and second battery lead plate 12, can charge.
In one embodiment, overcurrent may be owing to overcharge or another anomaly and flow to second battery lead plate 12 by circuit from first battery lead plate 11.When overcurrent flows through circuit, comprise that the load on the electrode assemblie 10 of first battery lead plate 11 and second battery lead plate 12 may be excessive, and therefore the anomaly such as blast may take place.
Yet, because cutting off overcurrent, fuse 70 passes through circuit to prevent overcurrent flows, therefore can prevent or prevent substantially because the anomaly that overcurrent causes such as secondary cell 100 blasts.Like this, can guarantee that secondary cell 100 opposings are because the stability and the reliability of the anomaly that overcurrent causes.
In one embodiment, first battery lead plate 11 and second battery lead plate 12 comprise separately first uncoated 11a and second uncoated 12a and the first painting part 11b and the second painting part 12b.First uncoated 11a and second uncoated 12a be not for applying the zone of active material on collector (for example collector that is formed by metal forming).The first painting part 11b and the second painting part 12b are for being coated with the zone of active material on collector (for example collector that is formed by metal forming).In one embodiment, first uncoated 11a and second uncoated 12a are respectively uncoated of positive electrode and the uncoated portion of negative electrode, and the first painting part 11b and the second painting part 12b are respectively positive electrode painting part and negative electrode painting part.
In one embodiment, first uncoated 11a is formed on a side place along the length direction of first battery lead plate 11 of first battery lead plate 11, and second uncoated 12a is formed on another side place along the length direction of second battery lead plate 12 of second battery lead plate 12.
In one embodiment, electrode assemblie 10 forms by reel and push first battery lead plate 11 and second battery lead plate 12 and dividing plate 13 circularly.In one embodiment, electrode assemblie 10 is squeezed into the form of plate, to form as illustrated par 18 and bend 19 among Fig. 3.
In one embodiment, cover plate 30 is a thin plate.In one embodiment, electrolyte entrance 38a is formed in the cover plate 30, and electrolyte can be injected into by electrolyte entrance 38a.After electrolyte was injected by electrolyte entrance 38a, sealing plug 38 can be engaged among the electrolyte entrance 38a.In addition, the exhaust component 39 that wherein is formed with groove can be formed in the cover plate 30, to break according to the internal pressure of setting.
In one embodiment, the first terminal hole 21a and the second terminal hole 22a are formed in the cover plate 30.In one embodiment, the first terminal hole 21a and the second terminal hole 22a are respectively positive electrode terminal hole and negative electrode terminal hole.In one embodiment, first electrode terminal 21 passes the first terminal hole 21a and exposes, and second electrode terminal 22 passes the second terminal hole 22a and exposes.
Yet various embodiments of the present invention are not limited thereto, and for example first electrode terminal 21 and second electrode terminal 22 can have the form of rivet.In one embodiment, reach outside the housing 40 by the part of first electrode terminal 21 and second electrode terminal 22 being passed the first terminal hole 21a and the second terminal hole 22a, will go up between the extension that liner 25 is engaged in the first terminal hole 21a and the second terminal hole 22a and first electrode terminal 21 and second electrode terminal 22 and push and the extension of extend first electrode terminal 21 and second electrode terminal 22, first electrode terminal 21 and second electrode terminal 22 can be fixed to cover plate 30.
In one embodiment, first collector 50 comprises first collector plate 51 and first lead member 52.Similarly, in one embodiment, second collector 60 comprises second collector plate 61 and second lead member 62.In one embodiment, first collector plate 51 and second collector plate 61 are respectively positive electrode collector plate and negative electrode collector plate, and first lead member 52 and second lead member 62 are respectively positive electrode lead member and negative electrode lead member.
In one embodiment, first collector plate 51 is for example by using welding method to be incorporated into first uncoated 11a of electrode assemblie 10.In one embodiment, first collector plate 51 is electrically connected to first electrode terminal 21 via first lead member 52.Like this, first electrode terminal 21 is connected to first battery lead plate 11 of electrode assemblie 10 via first lead member 52 and first collector plate 51.
In addition, in one embodiment, second collector plate 61 is for example by using welding method to be incorporated into second uncoated 12a of electrode assemblie 10.In one embodiment, second collector plate 61 is electrically connected to second electrode terminal 22 via second lead member 62.Like this, second electrode terminal 22 is connected to second battery lead plate 12 of electrode assemblie 10 via second lead member 62 and second collector plate 61.
In one embodiment, insulating component 26 is formed between cover plate 30 and first lead member 52 and second lead member 62.In one embodiment, first lead member 52 and second lead member 62 comprise the first terminal lead wire unit 52a and the second terminal lead unit 62a and the first afflux lead wire unit 52b and the second afflux lead wire unit 62b respectively.The first terminal lead wire unit 52a and the second terminal lead unit 62a are by combination respectively and be electrically connected to first electrode terminal 21 and second electrode terminal 22.In one embodiment, first collector plate 51 and first lead member 52 form single integral unit.Similarly, in one embodiment, second collector plate 61 and second lead member 62 form single integral unit, and just, collector 50 forms single single piece.In another embodiment, first collector plate 51 and second collector plate 61 are by combination respectively be electrically connected to the first afflux lead wire unit 52b and the second afflux lead wire unit 62b.In one embodiment, the first afflux lead wire unit 52b and the second afflux lead wire unit 62b are by respectively in conjunction with (or otherwise contacting) be electrically connected to first uncoated 11a and second uncoated 12a of electrode assemblie 10.
According to another embodiment of the present invention, for one in first electrode terminal 21 and second electrode terminal 22, can not be formed for first battery lead plate 11 or second battery lead plate 12 and cover plate 30 ' electric last liner 25, insulating component 26 and the lower liner 27 that separates.In the case, cover plate 30 ' and/or housing 40 can be first electrode terminal or second electrode terminal.
For example, in the secondary cell 100 ' according to an embodiment, last liner 25 and lower liner 27 can not be formed between the cover plate 30 ' and first lead member 52, as shown in Figure 6.In the case, first lead member 52 directly contacts cover plate 30 '.
In the case, first electrode terminal 21 can pass the first terminal hole 21a and directly contact cover plate 30, and does not go up liner 25 and lower liner 27.In addition, first lead member 52 can directly contact cover plate 30.In the case, cover plate 30 and housing 40 have the polarity identical with first electrode terminal 21.
In one embodiment, secondary cell 100 is a lithium rechargeable battery.Yet, various embodiments of the present invention are not limited thereto, and except lithium rechargeable battery, secondary cell 100 can be a kind of in the secondary cell of various other types, for example nickel (Ni)-cadmium (Cd) secondary cell, nickel-hydrogen (H) secondary cell or lithium (Li) secondary cell.
Further, in one embodiment, secondary cell 100 is as illustrated rectangular battery among Fig. 1 and Fig. 2.Yet various embodiments of the present invention are not limited thereto, and secondary cell 100 can be a kind of in the battery of various other types, for example cylindrical battery or bag shape battery.
For example, in one embodiment, first battery lead plate 11, first collector plate 51 and first lead member 52 that are electrically connected to each other can be formed by the same material such as aluminium (Al).In addition, for example, in one embodiment, second battery lead plate 12, second collector plate 61 and second lead member 62 that are electrically connected to each other can be formed by the same material such as copper (Cu).
In one embodiment, fuse 70 is formed in first collector 50 and second collector 60 one or two.In one embodiment, fuse 70 is by making at least one the part in first collector 50 and second collector 60 to such an extent that form than other parts are thin, just, fuse 70 has the little cross-sectional area of other parts than first collector 50 or second collector 60.In the case, the resistance of fuse 70 is compared and can be increased with other part, thereby increases Joule heat, and therefore, if overcurrent flows is passed through first collector 50 and second collector 60, then fuse 70 can be melted and cut off overcurrent owing to this heat.
In one embodiment, be not formed additional element, therefore comprise that the secondary cell 100 of fuse 70 can have simple structure because fuse 70 can be formed among in first collector 50 and second collector 60 one.Fuse 70 can be formed in first collector 50 and second collector 60 at least one.
In one embodiment, fuse 70 can be formed in second lead member 62 of first lead member 52 of first collector 50 or second collector 60.For example, fuse 70 can be formed in first collector 50.In one example, fuse 70 is integrally formed on first lead member 52 and has the little cross-sectional area of other parts than first lead member 52.In one embodiment, fuse 70 can be formed by the low-melting Al of fusing point than Cu, and therefore the performance of fuse 70 can be enhanced.
In the case, fuse 70 can be formed in first lead member 52, is used to form the structure of fuse 70 with simplification.In addition, in one embodiment, fuse 70 is formed among among the first afflux lead wire unit 52b and the second afflux lead wire unit 62b one, to be convenient to guarantee to be used for the space of fuse 70 and insulation unit 80.Fig. 3 is a partial, exploded perspective view, and it is illustrated in and comprises the first afflux lead wire unit 52b and first lead member 52 of separating with electrode assemblie 10 in the secondary cell 100, and is formed on the fuse 70 among the first afflux lead wire unit 52b in one embodiment.
In one embodiment, as shown in Figure 3, fuse 70 is formed among the first afflux lead wire unit 52b.In the case, fuse 70 can be formed by the low-melting Al of fusing point than Cu, and therefore the performance of fuse 70 can be enhanced.Yet various embodiments of the present invention are not limited thereto, and in another embodiment, fuse 70 can be formed among the second afflux lead wire unit 62b.
Electrolyte with liquid or gel form can be filled in the housing 40 of hold electrodes assembly 10.In one embodiment, first collector 50 that wherein is formed with fuse 70 can contact electrolyte.In addition, when fuse 70 works owing to overcurrent, can produce spark.Like this, therefore this spark may and may blast with the electrolyte reaction.
Therefore, in one embodiment, secondary cell 100 comprises insulation unit 80.In one embodiment, insulation unit 80 is constructed to prevent or prevents substantially fuse 70 contact electrolyte.In one embodiment, insulation unit 80 usefulness insulating material twine fuse 70, so that fuse 70 and electrolyte are cut off.In one embodiment, insulation unit 80 comprises insulating tape or insulator die goods (insulation molding) (for example, resin formed article).
Owing to be wrapped in around the fuse 70 as the insulating tape of example of insulation unit 80, so fuse 70 can cut off by electricity with outside the contact, and the structure of secondary cell 100 can be simplified.
In addition, fuse 70 and insulation unit 80 can be formed simply, and fuse 70 can protect secondary cell 100 to avoid influence such as the anomaly of overcharging.In addition because insulation unit 80 cuts off fuse 70 and electrolyte, even and thereby when fuse 70 works, also prevent or prevent substantially secondary cell 100 blasts or catch fire, so can guarantee the stability and the reliability of secondary cell 100.
In one embodiment, electrode assemblie 10 also is driven plain the form into plate subsequently by reeling, and has the inner space in electrode assemblie 10.In one embodiment, first collector plate 51 and second collector plate 61 are soldered to the outer end of electrode assemblie 10, and push first uncoated 11a and second uncoated 12a respectively.
In one embodiment, first collector plate 51 contacts first uncoated 11a and second uncoated 12a respectively with second collector plate 61 on big zone.Further, in one embodiment, first collector plate 51 and second collector plate 61 are for example by using method for laser welding to be attached to the outer surface at the place, opposite end of electrode assemblie 10 respectively.As shown in Figure 3, in one embodiment, first collector plate 51 comprises two parts of extending from the first afflux lead wire unit 52b, is used to contact the opposing outer face of first uncoated 11a.Similarly, in one embodiment, second collector plate 61 comprises two parts of extending from the second afflux lead wire unit 62b, is used to contact the opposing outer face of second uncoated 12a.In one embodiment, first collector plate 51 and second collector plate 61 can be attached to the end at the place, opposite end of electrode assemblie 10 respectively.In one embodiment, first collector plate 51 and second collector plate 61 are by using method for laser welding combined, and compare first collector plate 51 with method for ultrasound welding thus and second collector plate 61 can have bigger thickness, therefore the resistance of first collector plate 51 and second collector plate 61 can be reduced.
As mentioned above, even when owing to overcharge or during overcurrent flows that anomaly causes, secondary cell 100 also can be prevented from or prevent substantially blast.
Fig. 4 is the cutaway view of secondary cell 200 according to another embodiment of the present invention.Fig. 5 is a partial, exploded perspective view, and it is illustrated among Fig. 4 and comprises the first terminal lead wire unit 252a and first lead member 252 of separating with electrode assemblie 210 in the illustrative secondary cell 200, and fuse 270 is formed among the first terminal lead wire unit 252a.
When comparing with illustrative secondary cell 100 among Fig. 2, in secondary cell 200, fuse 270 is formed among the first terminal lead wire unit 252a.To no longer repeat of secondary cell 200 with above parts and being described in here of structure about secondary cell 100 described parts and structural similarity.
With reference to Fig. 4 and Fig. 5, in one embodiment, secondary cell 200 comprises: electrode assemblie 210; First electrode terminal 221 and second electrode terminal 222; Cover plate 230; Housing 240; First collector 250 and second collector 260; Fuse 270 and insulation unit 280.
In one embodiment, electrode assemblie 210 can form as first battery lead plate 211 of positive electrode plate and negative electrode plate and the dividing plate 213 of second battery lead plate 212 and the insulator of conduct between first battery lead plate 211 and second battery lead plate 212 respectively by reeling.Housing 240 hold electrodes assemblies 210.In one embodiment, first electrode terminal 221 and second electrode terminal 222 are respectively positive electrode terminal and negative electrode terminal.
In one embodiment, first electrode terminal 221 and second electrode terminal 222 are electrically connected to first battery lead plate 211 and second battery lead plate 212 of electrode assemblie 210 respectively, thereby are revealed housing 240 outsides.Cover plate 230 combines with the opening of housing 240 or the opening of covering shell 240.In one embodiment, first collector 250 and second collector 260 are respectively positive electrode current collector and the negative electrode collector that is electrically connected to first battery lead plate 211 and second battery lead plate 212.
In one embodiment, when owing to overcharge or during overcurrent flows that anomaly causes, fuse 270 works, to cut off electric current.In one embodiment, insulation unit 280 usefulness insulating material twine fuse 270 fuse 270 is contacted the electricity partition with any outside.
In one embodiment, first battery lead plate 211 comprises first uncoated the 211a and the first painting part 211b, and second battery lead plate 212 comprises second uncoated the 212a and the second painting part 212b.In one embodiment, first uncoated 211a and second uncoated 212a are respectively uncoated of positive electrode and the uncoated portion of negative electrode, and the first painting part 211b and the second painting part 212b are respectively positive electrode painting part and negative electrode painting part.In one embodiment, the first terminal hole 221a that first electrode terminal 221 passes as the positive electrode terminal hole exposes, and the second terminal hole 222a that second electrode terminal 222 passes as the negative electrode terminal hole exposes.
In one embodiment, electrolyte entrance 238a is formed in the cover plate 230, and sealing plug 238 can be engaged among the electrolyte entrance 238a.Exhaust component 239 also can be formed in the cover plate 230.Last liner 225 and lower liner 227 can be respectively between cover plate 230 and first electrode terminal 221 and second electrode terminals 222, with cover plate 230 and first electrode terminal 221 and 222 insulation of second electrode terminal.The packing ring 224 that is used to cushion connection power can be arranged in liner 225.First electrode terminal 221 and second electrode terminal 222 can connect with nut 229.Alternately, first electrode terminal 221 and second electrode terminal 222 can be formed and have any other suitable structure, for example form of rivet.
In one embodiment, first collector plate 251 of corresponding first collector 250 and second collector 260 and second collector plate 261 are for example by using welding method to be attached to first uncoated 211a and second uncoated 212a of electrode assemblie 210 respectively.In one embodiment, first collector plate 251 and second collector plate 261 are electrically connected to first electrode terminal 221 and second electrode terminal 222 respectively via first lead member 252 and second lead member 262 of corresponding first collector 250 and second collector 260.
In one embodiment, insulating component 226 is formed between cover plate 230 and first lead member 252 and second lead member 262.In one embodiment, first lead member 252 and second lead member 262 comprise the first terminal lead wire unit 252a and the second terminal lead unit 262a and the first afflux lead wire unit 252b and the second afflux lead wire unit 262b respectively.In one embodiment, the first terminal lead wire unit 252a and the second terminal lead unit 262a are by combination respectively be electrically connected to first electrode terminal 221 and second electrode terminal 222.In one embodiment, first collector plate 251 and first lead member 252 are formed single integral unit.Similarly, in one embodiment, second collector plate 261 and second lead member 262 are formed single integral unit.In another embodiment, first collector plate 251 and second collector plate 261 are by combination respectively be electrically connected to the first afflux lead wire unit 252b and the second afflux lead wire unit 262b.In one embodiment, the first afflux lead wire unit 252b and the second afflux lead wire unit 262b are by respectively in conjunction with (or otherwise contacting) be electrically connected to first uncoated 211a and second uncoated 212a of electrode assemblie 210.
In one embodiment, first collector 250 comprises first collector plate 251 and first lead member 252, and second collector 260 comprises second collector plate 261 and second lead member 262.In one embodiment, first collector plate 251 and second collector plate 261 are respectively positive electrode collector plate and negative electrode collector plate, and first lead member 252 and second lead member 262 are respectively positive electrode lead member and negative electrode lead member.
In one embodiment, first collector plate 251 is for example by using welding method to be incorporated into first uncoated 211a of electrode assemblie 210.In one embodiment, first collector plate 251 is electrically connected to first electrode terminal 221 via first lead member 252.Like this, in one embodiment, first electrode terminal 221 is connected to first battery lead plate 211 of electrode assemblie 210 via first lead member 252 and first collector plate 251.
In addition, in one embodiment, second collector plate 261 is for example by using welding method to be incorporated into second uncoated 212a of electrode assemblie 210.In one embodiment, second collector plate 261 is electrically connected to second electrode terminal 222 via second lead member 262.Like this, in one embodiment, second electrode terminal 222 is connected to second battery lead plate 212 of electrode assemblie 210 via second lead member 262 and second collector plate 261.
Simultaneously, according to another embodiment of the present invention, for one in first electrode terminal 221 and second electrode terminal 222, can not be formed for first battery lead plate 211 or second battery lead plate 212 and cover plate 230 ' electric last liner 225, insulating component 226 and the lower liner 227 that separates.In the case, cover plate 230 ' and/or housing 240 can be first electrode terminal or second electrode terminal.
For example, in the secondary cell 200 ' according to an embodiment, last liner 225 and lower liner 227 can not be formed between the cover plate 230 ' and first lead member 252, as shown in Figure 7.In the case, first lead member 252 directly contacts cover plate 230 '.
In one embodiment, because fuse 270 is formed among in first collector 250 and second collector 260 one rather than forms additional element, therefore comprise that the secondary cell 200 of fuse 270 has simple structure.Fuse 270 can be formed in first collector 250 and second collector 260 at least one.
In one embodiment, fuse 270 is formed in second lead member 262 of first lead member 252 of first collector 250 or second collector 260.For example, in one embodiment, fuse 270 is formed in first collector 250.In the case, fuse 270 can be formed by the low-melting Al of fusing point than Cu, and therefore the performance of fuse 270 can be enhanced or improve.
In one embodiment, fuse 270 can be formed in first lead member 252, is used to form the structure of fuse 270 with further simplification.In addition, in one embodiment, fuse 270 can be formed among among the first terminal lead wire unit 252a and the second terminal lead unit 262a one, to be convenient to guarantee to be used for the space of fuse 270 and insulation unit 280.
In one embodiment, as shown in Figure 5, fuse 270 is formed among the first terminal lead wire unit 252a.In the case, fuse 270 can be formed by the low-melting Al of fusing point than Cu, and therefore the performance of fuse 270 can be enhanced.
In one embodiment, the electrolyte with liquid or gel form can be filled in the housing 240 of hold electrodes assembly 210.In one embodiment, first collector 250 that wherein is formed with fuse 270 can contact electrolyte.In addition, when fuse 270 works owing to overcurrent, can produce spark.Like this, therefore this spark may and may blast with the electrolyte reaction.
Therefore, in one embodiment, secondary cell 200 comprises insulation unit 280.Insulation unit 280 is constructed to prevent or prevents substantially fuse 270 contact electrolyte.In one embodiment, insulation unit 280 usefulness insulating material twine fuse 270, so that fuse 270 and electrolyte are cut off.In one embodiment, insulation unit 280 comprises insulating tape or insulator die goods (for example, resin formed article).
In one embodiment, owing to be wrapped in around the fuse 270 as the insulating tape of example of insulation unit 280, so fuse 270 can cut off by electricity with any outside contact, and the structure of secondary cell 200 can be simplified.
In addition, fuse 270 and insulation unit 280 can be formed simply, and fuse 270 can protect secondary cell 200 to avoid influence such as the anomaly of overcharging.In addition because insulation unit 280 cuts off fuse 270 and electrolyte, even and thereby when fuse 270 works, also prevent or prevent substantially secondary cell 200 blasts or catch fire, so can guarantee the stability and the reliability of secondary cell 200.
As mentioned above, even when owing to overcharge or during overcurrent flows that anomaly causes, secondary cell 200 also can be prevented from or prevent substantially blast.
Exemplary embodiments more of the present invention are here disclosed, although and adopted particular term, they only are used and will be explained on general and describing significance but not for limiting purpose.The feature among each embodiment or the description of aspect should typically be considered to can be used for other similar feature or the aspects among other embodiment.Therefore, it will be appreciated by the skilled addressee that under the situation that does not break away from the spirit and scope of the present invention that propose in the claims and can make various changes in form and details.
Claims (17)
1. secondary cell comprises:
Electrode assemblie, described electrode assemblie comprise first battery lead plate, second battery lead plate and the dividing plate between described first battery lead plate and described second battery lead plate;
The housing that holds described electrode assemblie;
Be electrically connected to the electrode terminal of described first battery lead plate;
Be connected between described first battery lead plate and the described electrode terminal and be electrically connected the collector of described first battery lead plate and described electrode terminal, described collector comprises the fuse part; And
Insulation unit on the described fuse part of described collector.
2. secondary cell as claimed in claim 1, wherein said insulation unit have than the big surface of described fuse part.
3. secondary cell as claimed in claim 1, wherein said fuse partly have the cross-sectional area littler than other parts of described collector.
4. secondary cell as claimed in claim 1, wherein said fuse partly have the resistance higher than other parts of described collector.
5. secondary cell as claimed in claim 1, wherein said electrode terminal reaches described outside.
6. secondary cell as claimed in claim 5 further comprises the cover plate of the opening that seals described housing, and wherein said electrode terminal passes the terminal hole that is formed in the described cover plate and stretches out.
7. secondary cell as claimed in claim 1, wherein said insulation unit comprises at least one in insulating tape and the insulator die goods.
8. secondary cell as claimed in claim 1, wherein said collector forms single single piece.
9. secondary cell as claimed in claim 1, wherein said collector comprises:
Be connected to the collector plate of described first battery lead plate; With
Be connected to the lead member of described electrode terminal and described collector plate.
10. secondary cell as claimed in claim 9, wherein said lead member comprises:
Be connected to the terminal lead unit of described electrode terminal; With
Extend and be connected to the afflux lead wire unit of described collector plate from described terminal lead unit.
11. secondary cell as claimed in claim 10, wherein said afflux lead wire unit comprises described fuse part.
12. secondary cell as claimed in claim 10, wherein said terminal lead unit comprises described fuse part.
13. secondary cell as claimed in claim 9, wherein said fuse partly is integrally formed on the described lead member, and has the cross-sectional area littler than other parts of described lead member.
14. secondary cell as claimed in claim 1,
Wherein said electrode terminal is first electrode terminal, and described secondary cell further comprises second electrode terminal that is electrically connected to described second battery lead plate and reaches described outside; And
Wherein said collector is first collector, and described secondary cell further comprises second collector that is connected between described second battery lead plate and described second electrode terminal and is electrically connected described second battery lead plate and described second electrode terminal.
15. secondary cell as claimed in claim 14,
Wherein said first battery lead plate is a positive electrode plate, and described first collector is a positive electrode current collector, and
Wherein said second battery lead plate is a negative electrode plate, and described second collector is the negative electrode collector.
16. secondary cell as claimed in claim 15, wherein said first collector comprises aluminium, and described second collector comprises copper.
17. secondary cell as claimed in claim 1, wherein said fuse partly is constructed to, when equivalent value flowed through described collector more than or equal to the electric current of the value of setting electric current, described fuse part fractional melting also will described first battery lead plate and the disconnection of described electrode terminal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31911010P | 2010-03-30 | 2010-03-30 | |
| US61/319,110 | 2010-03-30 | ||
| US12/868,646 | 2010-08-25 | ||
| US12/868,646 US9059459B2 (en) | 2010-03-30 | 2010-08-25 | Secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102208594A true CN102208594A (en) | 2011-10-05 |
| CN102208594B CN102208594B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110083701.2A Active CN102208594B (en) | 2010-03-30 | 2011-03-30 | Secondary battery |
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Owner name: SAMSUNG SDI CO., LTD. Free format text: FORMER OWNER: SB LIMOTIVE CO., LTD. Effective date: 20130307 Owner name: BOSCH GMBH ROBERT Effective date: 20130307 |
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