CN101459233B - Battery pack and manufacture method thereof - Google Patents

Battery pack and manufacture method thereof Download PDF

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Publication number
CN101459233B
CN101459233B CN200910001525.6A CN200910001525A CN101459233B CN 101459233 B CN101459233 B CN 101459233B CN 200910001525 A CN200910001525 A CN 200910001525A CN 101459233 B CN101459233 B CN 101459233B
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China
Prior art keywords
flat
corbel back
back slab
electrode corbel
type battery
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CN200910001525.6A
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CN101459233A (en
Inventor
渡边正司
丹上雄儿
太田正保
榎田刚
岸本洋明
雨谷龙一
濑川辉夫
早见宗人
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Vision Aesc Japan Co ltd
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Nissan Motor Co Ltd
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Priority claimed from JP2005068230A external-priority patent/JP2006196428A/en
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
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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

Abstract

A kind of battery pack (100), form with the stacked multiple Flat-type battery (10A ~ 10F) of the mode of the alternating polarity making electrode corbel back slab (11A ~ 11F, 12A ~ 12F), there is such structure: for the junction surface Flat-type battery in groups when stacked all Flat-type battery (10A ~ 10F) are got up mutually be connected in series, being in multiple positions of battery pack, being electrically connected in series all Flat-type battery by engaging respective junction surface.

Description

Battery pack and manufacture method thereof
The divisional application that the application is the applying date is on 05 30th, 2005, national applications number is 200580017728.4, denomination of invention is battery pack and manufacture method thereof.
Technical field
The present invention relates to a kind of can easily the electrode corbel back slab of Flat-type battery be bonded with each other with ultrasonic bonding battery pack and manufacture method.
Background technology
In recent years, corresponding to the raising of environmental consciousness, have the power source of automobile from using the engine of fossil fuel to the trend utilizing the motor of electric energy to shift.Therefore, the technology becoming the battery in motor power source is also developing rapidly.
Wish to carry on automobile small-size light-weight, can frequent charge discharge large electric power, the battery of vibration resistance, fine heat radiation property.Should these requirements, in recent years, developed as shown in Japanese Unexamined Patent Publication No 2004-31136 publication, be connected in series many Flat-type battery and the battery pack that forms.
Summary of the invention
In order to charge with high efficiency, discharge large electric power, requires battery pack Towards Higher Voltage.In order to make battery pack Towards Higher Voltage, need to be connected in series the multiple Flat-type battery forming battery pack.In order to be connected in series multiple Flat-type battery, make the electrode corbel back slab direction positive and negative electrode of Flat-type battery differently from each other stacked, the positive and negative electrode corbel back slab of the Flat-type battery after stacked in groups, use the mechanical mechanisms such as ultrasonic bonding machine or packing ring from the downside or upside of stacked direction, make positive and negative electrode corbel back slab in groups be bonded with each other in order.
But there are the following problems for these joint methods.
First, when using ultrasonic bonding machine to engage, the electrode corbel back slab (positive and negative electrode corbel back slab in groups) wanting to engage must be only clamped with the head of ultrasonic bonding machine, so can not carry out under the state of stacked good all Flat-type battery, in order to ensure the insertion space of head, need the Flat-type battery except coalesced object is temporarily removed (opening up and down to stacked direction), so exist, not only its operation is pretty troublesome, and the automation of its operation is also difficult, the electrode corbel back slab that joint is complete produces the problems such as unnecessary stress.
Secondly, when carrying out mechanical engagement, owing to employing the mechanical mechanism such as bolt and nut, packing ring, thus likely produce the uneven of contact resistance or produce because of vibration cause lax, have problems in durable reliability, maintainability.
The object of the present invention is to provide and a kind ofly easily can make that the electrode corbel back slab of Flat-type battery is bonded with each other, that durable reliability, maintainability are excellent battery pack and manufacture method thereof with ultrasonic bonding.
Other object, feature and speciality of the present invention, can be well understood to by referring to the preferred forms illustrated in later explanation and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the outside drawing of the execution mode 1 of battery pack of the present invention.
Fig. 2 is the figure of the situation carrying out the electrode corbel back slab of the Flat-type battery of knitting layer poststack with ultrasonic bonding machine.
Fig. 3 is the figure of the status of electrically connecting representing battery pack.
Fig. 4 is the figure of the necessary Flat-type battery of battery pack in order to form execution mode 1.
Fig. 5 is the figure of the necessary insulating trip of battery pack in order to form execution mode 1.
Fig. 6 is the figure of the manufacture process of battery pack for illustration of execution mode 1.
Fig. 7 is the figure of the manufacture process of battery pack for illustration of execution mode 1.
Fig. 8 is the outside drawing of the execution mode 2 of battery pack of the present invention.
Fig. 9 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 2.
Figure 10 is the figure of the manufacture process of battery pack for illustration of execution mode 2.
Figure 11 is the figure of the manufacture process of battery pack for illustration of execution mode 2.
Figure 12 is the figure of the manufacture process of battery pack for illustration of execution mode 2.
Figure 13 is the figure of another form representing the necessary Flat-type battery of battery pack forming execution mode 2.
Figure 14 is the figure of another form representing the necessary Flat-type battery of battery pack forming execution mode 2.
Figure 15 is the figure of another form representing the necessary Flat-type battery of battery pack forming execution mode 2.
Figure 16 is the figure of another form representing the necessary Flat-type battery of battery pack forming execution mode 2.
Figure 17 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 3.
Figure 18 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 3.
Figure 19 is the figure of the manufacture process of battery pack for illustration of execution mode 3.
Figure 20 is the figure of the manufacture process of battery pack for illustration of execution mode 3.
Figure 21 is the figure of other manufacture processes of battery pack for illustration of execution mode 3.
Figure 22 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 4.
Figure 23 is the figure of the manufacture process of battery pack for illustration of execution mode 4.
Figure 24 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 5.
Figure 25 is the figure of the manufacture process of battery pack for illustration of execution mode 5.
Figure 26 is the figure of the manufacture process of battery pack for illustration of execution mode 5.
Figure 27 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 6.
Figure 28 is the figure of the manufacture process of battery pack for illustration of execution mode 6.
Figure 29 is the figure representing the necessary Flat-type battery of battery pack forming execution mode 7.
Figure 30 is the figure of the manufacture process of battery pack for illustration of execution mode 7.
Figure 31 is the figure of the manufacture process of battery pack for illustration of execution mode 7.
Figure 32 is the figure of the manufacture process of battery pack for illustration of execution mode 8.
Figure 33 is the figure of the shape of the Flat-type battery of the battery pack representing execution mode 9.
Figure 34 is the figure of the manufacture process of battery pack for illustration of execution mode 9.
Figure 35 is the figure of the manufacture process of battery for illustration of execution mode 9.
Figure 36 is the figure of the manufacture process of battery for illustration of execution mode 9.
Figure 37 is the figure of the manufacture process of battery for illustration of execution mode 9.
Figure 38 is the figure of the manufacture process of battery for illustration of execution mode 9.
Figure 39 is the figure of the manufacture process of battery for illustration of execution mode 9.
Figure 40 is the figure of the manufacture process of battery for illustration of execution mode 9, and (A) is the A-A cutaway view of Figure 39, and (B) is the B-B cutaway view of Figure 39.
Figure 41 is the cutaway view of the battery of present embodiment.
Figure 42 is the outside drawing of the execution mode 10 of battery pack of the present invention.
Figure 43 is the figure of the manufacture process of battery for illustration of execution mode 10.
Figure 44 is the figure of the manufacture process of battery for illustration of execution mode 10, and (A) is the figure of the example representing folding mode, and (B) is the figure of another example representing folding mode.
Embodiment
Battery pack and the manufacture method thereof of present embodiment is described below in detail based on accompanying drawing.Present embodiment is divided into " execution mode 1 " that form battery pack by 6 kinds of variform 8 Flat-type battery of electrode corbel back slab, form by 4 kinds of variform 12 Flat-type battery of electrode corbel back slab " execution mode 2 " of battery pack, form by 3 kinds of variform 8 Flat-type battery of electrode corbel back slab " execution mode 3 " of battery pack, form by 4 kinds of variform 8 Flat-type battery of electrode corbel back slab " execution mode 4 " of battery pack, form by 8 Flat-type battery that 6 kinds of electrode corbel back slab length is different " execution mode 5 " of battery pack, form by 8 Flat-type battery that 3 kinds of electrode corbel back slab length is different " execution mode 6 " of battery pack, with the length of 7 kinds of electrode corbel back slabs and " execution mode 7 " of variform 8 Flat-type battery formation battery pack, form by 8 Flat-type battery that 6 kinds of electrode corbel back slab extraction locations are different " execution mode 8 " of battery pack, formed " execution mode 9 " of battery pack by the Flat-type battery of toroidal with the electrode corbel back slab configured with regulation central angle and be described by " execution mode 10 " that the small disc type batteries of the multiple Flat-type battery of folding connection is formed battery pack.
execution mode 1
Fig. 1 is the outside drawing of the execution mode 1 of battery pack of the present invention.The battery pack 100 of present embodiment is the battery pack that 8 Flat-type battery are laminated along cell thickness direction by the mode of the alternating polarity of electrode corbel back slab.The battery pack 100 of present embodiment has such structure: when stacked all Flat-type battery, junction surface for electrode corbel back slab Flat-type battery be in groups mutually connected in series is in multiple positions of battery pack, is electrically connected in series all Flat-type battery by being engaged at respective junction surface.Specifically, Flat-type battery is rectangular when face is seen from it, and the junction surface of electrode corbel back slab is configured in the length direction (transverse direction in figure) of Flat-type battery and Width (longitudinal direction in figure) dislocation at each stratification position.Therefore, the shape of the electrode corbel back slab of drawing from the both sides of Flat-type battery has intrinsic shape at each stratification position, with to make when stacked 8 Flat-type battery respectively electrode corbel back slab in groups by point to 4 directions.
Further, not shown insulating trip is inserted with each other in Flat-type battery, the function insulated between the electrode corbel back slab that the function and making that this insulating trip has the voltage that can detect each Flat-type battery should insulate.In order to realize above-mentioned two kinds of functions, shape and the electrode corbel back slab shape of insulating trip similarly have intrinsic shape at its each stratification position.
Battery pack 100 is the battery pack being electrically connected in series all Flat-type battery by the electrode corbel back slab of the Flat-type battery with the ultrasonic bonding machine 200 knitting layer poststack shown in Fig. 2.As shown in Figure 1, because the outstanding part of the electrode corbel back slab of battery pack is divided to 4 directions, so by the Flat-type battery be positioned at topmost and under it being connected in series mutually with ultrasonic bonding electrode corbel back slab group 110A, by being mutually connected in series being positioned at from upper several third and fourth Flat-type battery with ultrasonic bonding electrode corbel back slab group 110B, by being mutually connected in series being positioned at from lower several third and fourth Flat-type battery with ultrasonic bonding electrode corbel back slab group 110C, by being mutually connected in series being positioned at bottom and on it Flat-type battery with ultrasonic bonding electrode corbel back slab group 110D.Ultrasonic bonding above by point to the electrode corbel back slab at 4 places in 4 directions time, then all 8 Flat-type battery are connected in series.
In addition, be positioned at Flat-type battery each other, the one side side of the insulating trip with insulator function is provided with that realize detecting the function of the voltage of Flat-type battery, not shown voltage detection terminal.Owing to being provided with wire at voltage detection terminal, so draw the wire group 120A of 4 from battery pack 100 side, draw the wire group 120B of 3 from opposite side.Each wire is connected with not shown voltage detector, by monitoring that its voltage checks the operating state of each Flat-type battery.
In the battery pack of present embodiment, can be divided into and at unduplicated 4 places of stacked direction, all Flat-type battery electricity after stacked being engaged, so can in all Flat-type battery of stacked rear direct joint, thus not only workability be good, and also transfiguration is easy in the automation of joining process.Further, unnecessary stress can not be produced at the complete electrode corbel back slab of joint, there is no the mechanical engagement such as bolt and nut, packing ring part, so excellent in durable reliability, maintainability.
When the battery pack of present embodiment is equipped on vehicle, between battery pack and battery pack, insert heat abstractor and be laminated into 3 layers, by transversely arranged 4 row of battery pack being laminated into 3 layers, fix with the mode heat abstractor clamping all battery pack from the both sides of stacked direction.The heat abstractor being positioned at stacked direction both sides is fixed by the mode that the power of regulation is drawn mutually.Thus, all Flat-type battery are applied equably to the pushing force specified.
Like this, in the battery pack of 3 layers × 4 row=12, the battery pack being positioned at stacked direction is connected in series by being directly interconnected by electrode corbel back slab, and in the superiors' battery pack adjacent with orlop by being interconnected by electrode corbel back slab with busbar, thus all battery pack are connected in series.Illustrate this status of electrically connecting in figure 3.As shown in the figure, the battery pack 100A of the formation 3 layers of first row, 100B, 100C, be all connected in series at stacked direction as illustrated.In addition, as described above by ultrasonic bonding by forming each battery pack 100A, the electrode corbel back slab (graphical indicia × part) of Flat-type battery of 100B, 100C is bonded with each other, by welding, the electrode corbel back slab (part of graphical indicia zero) of battery pack is interconnected.The connection of also carrying out 2nd ~ 4 battery pack that arrange electrode corbel back slab each other same with first row.In addition, be positioned at undermost battery pack electrode corbel back slab each other upper and be connected by being welded on busbar 130A, 130B, the battery pack electrode corbel back slab being each other positioned at the superiors is connected by being welded on busbar 130C.
If all battery pack are connected in series, then 8 × 3 layers × 4 row=96 all Flat-type battery are connected in series, at the high voltage that can obtain 3.85V/ × 96=370V between electrode terminal 140A, 140B at the one-sided heat abstractor of stacked direction.
Below, the manufacture method of the battery pack of present embodiment is described.
In order to the bonding station of electrode corbel back slab is divided into 4 directions, the battery pack 100 of present embodiment is except the Flat-type battery 100A shown in Fig. 4, its+at least one electrode corbel back slab of side or-side is L-shaped, for being divided into multiple position when making the junction surface of electrode corbel back slab after stacked Flat-type battery, make the electrode corbel back slab shape of each Flat-type battery different corresponding to stratification position.Fig. 4 represents the kind (shape of electrode corbel back slab is different) forming the necessary Flat-type battery of present embodiment battery pack 100.Battery pack 100 is that stacked 8 Flat-type battery form, but in order to make the bonding station of electrode corbel back slab divide to 4 directions, needs the Flat-type battery of the 6 kinds of shape electrode corbel back slabs had as shown in the figure.
First, to be positioned at undermost Flat-type battery 10A be the electrode corbel back slab of both sides is the rectangular battery of same shape.The electrode corbel back slab 11B being positioned at the Flat-type battery 10B of lower several second layer is the rectangle identical with the electrode corbel back slab of Flat-type battery 10A, and another electrode corbel back slab 12B is inverted L-shaped.The electrode corbel back slab 11C being positioned at the Flat-type battery 10C of lower several third layer is inverted L-shaped, and another electrode corbel back slab 12C is rectangle.The electrode corbel back slab 11D being positioned at the Flat-type battery 10D of lower several 4th layer is rectangle, and another electrode corbel back slab 12D is L-shaped.The electrode corbel back slab 11E being positioned at the Flat-type battery 10E of lower several layer 5 is that upset is inverted L-shaped, and another electrode corbel back slab 12E is the L-shaped same with Flat-type battery 10D.Finally, the electrode corbel back slab 11F being positioned at the Flat-type battery 10F of lower several layer 6 is that the upset same with Flat-type battery 10E is inverted L-shaped, and another electrode corbel back slab 12F is rectangle.In addition, the Flat-type battery being positioned at the superiors is the stacked battery identical with Flat-type battery 10C, and the Flat-type battery being positioned at several second layer is the stacked battery identical with Flat-type battery 10B.
It is more than the kind of the Flat-type battery that should prepare described when the table turning in of Flat-type battery can not transfer stacked by supposition, if but it is stacked that table turning in can be made to transfer, then making Flat-type battery 10B turn over can be general with Flat-type battery 10D, Flat-type battery 10C is turned over can be general with Flat-type battery 10F, so in this case, as long as prepare 4 kinds of Flat-type battery.
In addition, in the battery pack 100 of present embodiment, in order to Flat-type battery insulation each other and the voltage in order to detect Flat-type battery, use 7 insulating trips.In order to seek the insulation between the electrode corbel back slab that insulate, insulating trip and Flat-type battery similarly make its shape different corresponding to stratification position.Fig. 5 is the kind representing the necessary insulating trip of battery pack 100 forming present embodiment.In order to seek the insulation between the electrode corbel back slab that insulate, need illustrated 5 kinds of insulating trips.
First, insulating trip 20A with electrode corbel back slab there is no protuberance, position that the electrode corbel back slab 12A of such as Flat-type battery 10A is corresponding is formed with electrode corbel back slab insulation division 22A, is provided with voltage detection terminal 24A at electrode corbel back slab insulation division 22A.Voltage detection terminal 24A is pasted on a surface of electrode corbel back slab insulation division 22A.Thus voltage detection terminal 24A provides the voltage of Flat-type battery by the electrode corbel back slab be in contact with it time stacked.Although not shown, be connected with wire at voltage detection terminal 24A, thus be connected with the voltage detector etc. being located at outside.
The position that insulating trip 20B arranges electrode corbel back slab insulation division 22B differs 180 degree with insulating trip 20A.Voltage detection terminal 24B is pasted with at electrode corbel back slab insulation division 22B.
Insulating trip 20C with electrode corbel back slab has protuberance, position that the electrode corbel back slab 12B of the inverted L-shaped shape of such as Flat-type battery 10B is corresponding is formed with electrode corbel back slab insulation division 22C, at electrode corbel back slab insulation division 22C is not that the position of protuberance is pasted with voltage detection terminal 24C.
The difference of insulating trip 20D and insulating trip 20C is the shape of electrode corbel back slab insulation division 22C is L-shaped.At electrode corbel back slab insulation division 22D is not that the position of protuberance is provided with voltage detection terminal 24D.
The position that insulating trip 20E arranges electrode corbel back slab insulation division 22E differs 180 degree with insulating trip 20C.Voltage detection terminal 24E is pasted with at electrode corbel back slab insulation division 22E.
When manufacturing the battery pack of present embodiment, arrangement Flat-type battery and insulating trip also carry out stacked as shown in Figure 7 as shown in Figure 6.Specifically, from orlop to the superiors, undertaken stacked by the order of insulating trip 20A, the Flat-type battery 10B shown in the Flat-type battery 10A shown in Fig. 4, Fig. 5, insulating trip 20B, Flat-type battery 10C, insulating trip 20C, Flat-type battery 10D, insulating trip 20B, Flat-type battery 10E, insulating trip 20D, Flat-type battery 10F, insulating trip 20E, Flat-type battery 10B, insulating trip 20A, Flat-type battery 10C.
Before stacked, be first bonded with each other in Fig. 6 and make unit with mark × illustrated electrode corbel back slab with ultrasonic bonding.As shown in Figure 6, the unit number in advance made is 3 unit.
First, in Flat-type battery in groups, insulator is set each other, and the electrode corbel back slab of Flat-type battery is bonded with each other and makes multiple unit.That is, on Flat-type battery 10A, place insulating trip 20A and place Flat-type battery 10B thereon.Insulating trip 20A with voltage detection terminal 24A and Flat-type battery 10B+mode that lateral electrode corbel back slab 12B contacts configures.To Flat-type battery 10A+lateral electrode corbel back slab 12A and Flat-type battery 10B-lateral electrode corbel back slab 11B carries out ultrasonic bonding.At the end of ultrasonic bonding, then form the unit be made up of the Flat-type battery 10A and 10B that clip insulating trip 20A state.Also be carry out such unit equally to be formed to the unit be made up of the Flat-type battery 10C of state and 10D that clip insulating trip 20C, the unit that is made up of the Flat-type battery 10B of state and 10F that clip insulating trip 20E.
Secondly, make Flat-type battery and insulator by mutually alternately stacked and to make to be divided at the junction surface being used for mutually being connected in series the electrode corbel back slab of Flat-type battery in groups when stacked all Flat-type battery to come stacked flat type battery and insulator in the mode of diverse location to mix said units, Flat-type battery monomer and insulator.That is, mix the unit formed as mentioned above, and stacked Flat-type battery and insulating trip as shown in Figure 7, just form battery pack 100 as shown in Figure 1 in appearance.Take the battery pack 100 of still not engaged for all electrode corbel back slabs state to ultrasonic bonding machine 200, as shown in Figure 2, first ultrasonic bonding electrode corbel back slab group 110A, be then positioned at the Flat-type battery 10C of the superiors-the lateral electrode corbel back slab 11C Flat-type battery 10B lower with being positioned at it+lateral electrode corbel back slab 12B is engaged.Carrying out ultrasonic bonding part is that using of electrode corbel back slab 11C and electrode corbel back slab 12B marks the illustrated ledge of △.Flat-type battery 10B and the Flat-type battery 10F under being positioned at it is a unit, so their electrode corbel back slab 11B, 12F are engaged, in addition, the electrode corbel back slab insulation division 22A of insulating trip 20A makes the electrode corbel back slab 11B of the electrode corbel back slab 12C of Flat-type battery 10C and Flat-type battery 10B insulate, the electrode corbel back slab insulation division 22E of insulating trip 20E makes the electrode corbel back slab 11F of the electrode corbel back slab 12B of Flat-type battery 10B and Flat-type battery 10F insulate, so, by bonding electrodes corbel back slab group 110A, 3 Flat-type battery 10C, 10B, 10F are electrically connected in series.In addition, the voltage detection terminal 24A of insulating trip 20A contacts with the electrode corbel back slab 12C of Flat-type battery 10C, the voltage detection terminal 24E of insulating trip 20E contacts with the electrode corbel back slab 12B of Flat-type battery 10B, so by measuring the voltage between voltage detection terminal 24A, 24E, just learn the voltage of Flat-type battery 10C.
Then, electrode corbel back slab group 110B is carried out ultrasonic bonding (with reference to Fig. 2), then Flat-type battery 10F-the lateral electrode corbel back slab 11F Flat-type battery 10E lower with being positioned at it+lateral electrode corbel back slab 12E is engaged.Being carried out ultrasonic bonding part is that using of electrode corbel back slab 11F and electrode corbel back slab 12E marks the illustrated ledge of △.The electrode corbel back slab insulation division 22D of insulating trip 20D makes the electrode corbel back slab 11E of the electrode corbel back slab 12F of Flat-type battery 10F and Flat-type battery 10E insulate, so, by bonding electrodes corbel back slab group 110B, 4 Flat-type battery 10C, 10B, 10F, 10E are electrically connected in series.In addition, the voltage detection terminal 24E of insulating trip 20E contacts with the electrode corbel back slab 12B of Flat-type battery 10B, the voltage detection terminal 24D of insulating trip 20D contacts with the electrode corbel back slab 12F of Flat-type battery 10F, so by measuring the voltage between voltage detection terminal 24E, 24D, just learn the voltage of Flat-type battery 10B.
Then, electrode corbel back slab group 110C is carried out ultrasonic bonding (with reference to Fig. 2), then Flat-type battery 10E-the lateral electrode corbel back slab 11E Flat-type battery 10D lower with being positioned at it+lateral electrode corbel back slab 12D is engaged.Carrying out ultrasonic bonding part is that using of electrode corbel back slab 11E and electrode corbel back slab 12D marks the illustrated ledge of △.Because Flat-type battery 10D and the Flat-type battery 10C be positioned under it are a unit, so their electrode corbel back slab 11D, 12C is engaged, and, the electrode corbel back slab insulation division 22B of insulating trip 20B makes the electrode corbel back slab 11D of the electrode corbel back slab 12E of Flat-type battery 10E and Flat-type battery 10D insulate, the electrode corbel back slab insulation division 22C of insulating trip 20C makes the electrode corbel back slab 11C of the electrode corbel back slab 12D of Flat-type battery 10D and Flat-type battery 10C insulate, so, by bonding electrodes corbel back slab group 110C, 6 Flat-type battery 10C, 10B, 10F, 10E, 10D, 10C is electrically connected in series.In addition, the voltage detection terminal 24D of insulating trip 20D contacts with the electrode corbel back slab 12F of Flat-type battery 10F, the voltage detection terminal 24B of insulating trip 20B contacts with the electrode corbel back slab 12E of Flat-type battery 10E, and the voltage detection terminal 24C of insulating trip 20C contacts with the electrode corbel back slab 12D of Flat-type battery 10D, so by measuring the voltage between voltage detection terminal 24D, 24B, learn the voltage of Flat-type battery 10F, by measuring the voltage between voltage detection terminal 24B, 24C, learn the voltage of Flat-type battery 10E.
Finally, the junction surface being in diverse location is engaged in order.Electrode corbel back slab group 110D is carried out ultrasonic bonding (with reference to Fig. 2), then Flat-type battery 10C-the lateral electrode corbel back slab 11C Flat-type battery 10B lower with being positioned at it+lateral electrode corbel back slab 12B is engaged.Being carried out ultrasonic bonding part is that using of electrode corbel back slab 11C and electrode corbel back slab 12B marks the illustrated ledge of △.Flat-type battery 10B and the Flat-type battery 10A under being positioned at it is a unit, so their electrode corbel back slab 11B, 12A is engaged, and, the electrode corbel back slab insulation division 22B of insulating trip 20B makes the electrode corbel back slab 11B of the electrode corbel back slab 12C of Flat-type battery 10C and Flat-type battery 10B insulate, the electrode corbel back slab insulation division 22A of insulating trip 20A makes the electrode corbel back slab 11A of the electrode corbel back slab 12B of Flat-type battery 10B and Flat-type battery 10A insulate, so, by bonding electrodes corbel back slab group 110D, make all 8 Flat-type battery 10C of formation battery pack 100, 10B, 10F, 10E, 10D, 10C, 10B, 10A is electrically connected in series.In addition, the voltage detection terminal 24C of insulating trip 20C contacts with the electrode corbel back slab 12D of Flat-type battery 10D, the voltage detection terminal 24B of insulating trip 20B contacts with the electrode corbel back slab 12C of Flat-type battery 10C, and the voltage detection terminal 24A of insulating trip 20A contacts with the electrode corbel back slab 12B of Flat-type battery 10B, so, by measuring the voltage between voltage detection terminal 24C, 24B, learn the voltage of Flat-type battery 10D, by measuring the voltage between voltage detection terminal 24B, 24A, learn the voltage of Flat-type battery 10C.
In addition, in above formation, can not measure be positioned at orlop be located thereon Flat-type battery 10A, 10B voltage, but by under undermost Flat-type battery 10A stacking insulating sheets 20B, just can measure the voltage of Flat-type battery 10A, 10B.
As mentioned above, the manufacture method of battery pack according to the present embodiment, uses 8 Flat-type battery and 7 insulating trips, alternately laminated Flat-type battery and insulating trip, and carry out ultrasonic bonding to the electrode corbel back slab group 110A to 110D being in 4 places, thus battery pack 100 can be manufactured.Ultrasonic bonding part is dispersed in 4 directions, so directly can carry out joining process under the state of stacked good all Flat-type battery.Therefore, add the freedom shape of ultrasonic bonding chain-drive section, the automation transfiguration of joining process is easy.In addition, engage with ultrasonic wave, there is not mechanical engagement part, thus can not produce contact resistance uneven or produce because of vibration cause lax, sufficient reliability can be kept in durable reliability, maintenance.
In addition, although be necessary to arrange insulating trip between Flat-type battery, as long as stacking insulating sheets just can obtain the insulation between electrode corbel back slab, in addition owing to being pasted with voltage detection terminal, so do not need only to make voltage detection terminal be connected to the operation of electrode corbel back slab, thus improve workability.Further, if make insulating trip have the elastic force of appropriateness and the mantle friction of appropriateness, just can apply the plus-pressure of appropriateness, the dislocation of Flat-type battery can be prevented stacked good Flat-type battery.
execution mode 2
Fig. 8 is the outside drawing of the execution mode 2 of battery pack of the present invention.The battery pack 300 of present embodiment is the battery pack of stacked 12 Flat-type battery along cell thickness direction.The shape of the electrode corbel back slab of drawing from the both sides of Flat-type battery has fixing shape at each stratification position, to make when engaging 12 Flat-type battery in order bonding station for different positions.By engaging the electrode corbel back slab that incoming call connects Flat-type battery with the ultrasonic bonding machine 200 shown in Fig. 2.As shown in Figure 8, the electrode corbel back slab of battery pack 300 is in the completion status that is combined, and its outstanding part 310A, 310B, 310C, 310D are divided to 4 directions.Battery pack 300 is under the completion status that is combined, and 12 Flat-type battery are all connected in series.
When the battery pack of present embodiment is carried on vehicle, heat abstractor is inserted and stacked 2 layers between battery pack and battery pack, transversely arranged for the battery pack of stacked 2 layers 4 row, fix with the mode heat abstractor clamping all battery pack from stacked direction both sides.The heat abstractor of stacked direction both sides is fixed in the mode of mutually drawing by the power of regulation.Thus, all platypelloid type monocells are applied equably to the pushing force specified.
Like this, the battery pack of 2 layers × 4 row=8, in the same manner as execution mode 1, the battery pack being positioned at stacked direction is connected in series by being directly interconnected by electrode corbel back slab, the battery pack adjacent with orlop in the superiors is connected in series by being interconnected by electrode corbel back slab with busbar, thus all battery pack are connected in series.
If all battery pack are connected in series, then 12 × 2 layers × 4 row=96 Flat-type battery are all connected in series, and obtain the high voltage of 3.85V/ × 96=370V between electrode terminal 140A, 140B of heat abstractor (with reference to Fig. 3) one-sided at stacked direction.
The following describes the manufacture method of the battery pack of present embodiment.
In order to be divided by the bonding station of electrode corbel back slab to 4 directions, the battery pack 300 of present embodiment makes the electrode corbel back slab shape of each Flat-type battery different corresponding to stratification position.Fig. 9 represents the kind (shape of electrode corbel back slab is different) forming the necessary Flat-type battery of present embodiment battery pack 300.Battery pack 300 is that stacked 12 Flat-type battery form, but in order to make the bonding station of electrode corbel back slab divide to 4 directions, needs the Flat-type battery of the 4 kinds of shape electrode corbel back slabs had as shown in the figure.
A type Flat-type battery 30A by faced by-lateral electrode corbel back slab 31A-top of lateral electrode corbel back slab 31A see time left side cut away a part, by faced by+lateral electrode corbel back slab 32A+top of lateral electrode corbel back slab 32A see time right side cut away a part.The Flat-type battery 30B of Type B is that a part is cut away on the right side respectively when the top of electrode corbel back slab 31B, 32B is seen of electrode corbel back slab 31B, 32B respectively in both sides, and has protuberance 33B, 34B in the left side respectively when the top of electrode corbel back slab 31B, 32B is seen of electrode corbel back slab 31B, 32B respectively.C type Flat-type battery 30C faced by-lateral electrode corbel back slab 31C-right side when seeing, the top of lateral electrode corbel back slab 31C cuts away a part, faced by+lateral electrode corbel back slab 32C+part is cut away in left side when seeing, the top of lateral electrode corbel back slab 32C.The Flat-type battery 30D of D type is that a part is cut away in the left side respectively when the top of electrode corbel back slab 31D, 32D is seen of electrode corbel back slab 31D, 32D respectively in both sides, has protuberance 33D, 34D respectively on the right side respectively when the top of electrode corbel back slab 31D, 32D is seen of electrode corbel back slab 31D, 32D.
It is more than the kind of the Flat-type battery that should prepare described when the table turning in of Flat-type battery can not transfer stacked by supposition, but if Flat-type battery table turning in can be made to transfer stacked, then making Flat-type battery 30A turn over can be general with Flat-type battery 30C, Flat-type battery 30B is turned over can be general with Flat-type battery 30D, so in this case, as long as prepare 2 kinds of Flat-type battery.
When manufacturing the battery pack of present embodiment, arranging Flat-type battery as shown in figures 10 and 11 and carrying out stacked as shown in Figure 12.Specifically, from orlop to the superiors, stacked by the order of the Flat-type battery 30A shown in Fig. 8,30C, 30D, 30D, 30A, 30B, 30C, 30D, 30A, 30C, 30D, 30D.
Before stacked, the Flat-type battery of 33 ground combinations shown in Figure 10, Figure 11, ultrasonic bonding electrode corbel back slab is bonded with each other and make unit (Unit the 1st).That is, make in advance as shown in Figure 10, combination Flat-type battery 30D, 30D, 30C unit a, combination Flat-type battery 30A, 30D, 30C unit b, as shown in figure 11, combination Flat-type battery 30B, 30A, 30D unit c, combination Flat-type battery 30D, 30C, 30A unit d amount to Unit 4.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab be connected with the dotted line shown in Figure 10 with Figure 11 is bonded with each other.Such as in Fig. 10, make combination Flat-type battery 30D, 30D, 30C unit a time, first, engage be positioned at undermost Flat-type battery 30C+the protuberance 34C of lateral electrode corbel back slab 32C and the Flat-type battery 30D that is located thereon-the protuberance 33D of lateral electrode corbel back slab 31D; Then, engage be positioned at the Flat-type battery 30D of the superiors-the protuberance 33D of lateral electrode corbel back slab 31D and the Flat-type battery 30D under being positioned at it+the protuberance 34D of lateral electrode corbel back slab 32D.Engage by above order, then can engage in diverse position, so joining process is easy.
As shown in figure 12, between electrode corbel back slab 32D and electrode corbel back slab 31D, be provided as the insulant 40 of insulating element, with the Flat-type battery 30D making to be positioned at the superiors+lateral electrode corbel back slab 32D not with the Flat-type battery 30D be positioned on the downside of it-lateral electrode corbel back slab 31D is electrically connected.Insulant 40 can be the parts of sheet, also can be to paste insulating tape at the lower surface (direction as shown) of electrode corbel back slab 32D.Equally, insulant 40 is set between electrode corbel back slab 32D and electrode corbel back slab 31C, with make to be positioned at undermost Flat-type battery 30C-lateral electrode corbel back slab 31C not with the Flat-type battery 30D be located thereon+lateral electrode corbel back slab 32D is electrically connected.With above-mentioned 3 unit similarly making the remainder shown in Figure 10 and Figure 11.In addition, in fig. 12, and the figure of insulant 40 same shape be for making the insulant insulated between all electrode corbel back slabs.
Then, as shown in figure 12, joint unit a and unit b and production unit α (Unit the 2nd).As shown in Figure 10, the joint of unit a and unit b is undertaken by the protuberance 34A of the electrode corbel back slab 31A engaging the protuberance 33C being positioned at the electrode corbel back slab 31C of the undermost Flat-type battery 30C of unit a and the Flat-type battery 30A being positioned at the unit b the superiors.Further, joint unit c and unit d and production unit β.As shown in figure 11, the joint of unit c and unit d is undertaken by the protuberance 34D of the electrode corbel back slab 32D engaging the protuberance 33D being positioned at the electrode corbel back slab 31D of the undermost Flat-type battery 30D of unit c and the Flat-type battery 30D being positioned at the unit d the superiors.When being bonded with each other by unit as described above, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at not by the position that other parts hinder, so joining process is easy.
Finally, joint unit α and unit β and make the battery pack of present embodiment.As shown in figure 12, the joint of unit α and unit β is undertaken by the protuberance 34B of the electrode corbel back slab 32B engaging the protuberance 33C being positioned at the electrode corbel back slab 31C of the undermost Flat-type battery 30C of unit α and the Flat-type battery 30B being positioned at the unit β the superiors.As described above during joint unit α and unit β, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at completely not by the position that other parts hinder, so joining process is easy.
As mentioned above, the battery pack of present embodiment, production unit a, b, c, d, then joint unit a, b and production unit α, then joint unit c, d and production unit β, last joint unit α and unit β and form battery pack, can not undertaken, so joining process is easy by the position of other electrode corbel back slabs obstruction owing to engaging unit.Therefore, add the degree of freedom of the nose shape of ultrasonic bonding machine, the automation transfiguration of joining process is easy.In addition, use ultrasonic bonding, and there is not mechanical engagement part, thus can not produce contact resistance inequality maybe can not produce because of vibration cause lax, sufficient reliability can be kept in durable reliability, maintainability.
Figure 13 to Figure 16 represents other forms forming the necessary Flat-type battery of battery pack of the present invention.In execution mode 1, new Additional bumps on the electrode corbel back slab of common Flat-type battery and make the shape of electrode corbel back slab be L-shaped, and form the shape extended to both direction.In addition, in execution mode 2, be that a part for the electrode corbel back slab by cutting common Flat-type battery forms protuberance and makes the shape of electrode corbel back slab be L-shaped, and form the shape extended to both direction.Be by making the shape of electrode corbel back slab carry out various distortion to realize the shape extended to both direction from Figure 13 to Figure 15, in addition, Figure 16 is the shape realizing extending to 3 directions.By combining any one of these illustrated shapes, to the battery pack of having assembled, at different engagement position electrode corbel back slabs, maybe can be able to make in the process of composition battery pack at different engagement position electrode corbel back slabs.
execution mode 3
The battery pack of present embodiment be specify be combined in stacked 8 battery pack with the Flat-type battery of 3 kinds of electrode corbel back slab shapes as shown in figure 17 in cell thickness direction.The shape of the electrode corbel back slab of drawing from Flat-type battery both sides has intrinsic shape at each stratification position, and during to make to engage 8 Flat-type battery in order, its bonding station is positioned at different positions.It is made to be electrically connected by being engaged by the electrode corbel back slab of Flat-type battery with the ultrasonic bonding machine 200 shown in Fig. 2.The electrode corbel back slab of battery pack its assembled after state identical with the Fig. 8 shown in execution mode 2, its outstanding part is by point to 4 directions.Its 8 Flat-type battery of battery pack state after finishing assembly are all connected in series.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
Below, the manufacture method of the battery pack of present embodiment is described.
In order to be divided by the bonding station of electrode corbel back slab to 4 directions, the battery pack of present embodiment makes the shape of the electrode corbel back slab of each Flat-type battery different corresponding to stratification position.Figure 17 represents the kind (shape of electrode corbel back slab is different) of the necessary Flat-type battery of battery pack forming present embodiment.Battery pack is that stacked 8 Flat-type battery form, but in the present embodiment, in order to divide the bonding station of electrode corbel back slab to 4 directions, and uses the Flat-type battery of the 3 kinds of shape electrode corbel back slabs had as shown in the figure.
The Flat-type battery 50A of A type, by the electrode corbel back slab of-lateral electrode corbel back slab 51A and+lateral electrode corbel back slab 52A both sides respectively respectively in the face of should-top of lateral electrode corbel back slab 51A and+lateral electrode corbel back slab 52A see time left side cut away a part, respectively in the face of should-top of lateral electrode corbel back slab 51A and+lateral electrode corbel back slab 52A see time right side there is protuberance 53A, 54A.The Flat-type battery 50B of Type B, by during-lateral electrode corbel back slab 51B from viewed from this electrode corbel back slab top time right side cut away a part, a part is cut away in left side during the seeing in the face of this electrode corbel back slab top of+lateral electrode corbel back slab 52B, faced by-lateral electrode corbel back slab 51B top see time left side have protuberance 53B, faced by+lateral electrode corbel back slab 52B top see time right side there is protuberance 53D.The Flat-type battery 50C of C type, a part is cut away in left side during the seeing in the face of this electrode corbel back slab top of-lateral electrode corbel back slab 50C, a part is cut away on right side during the seeing in the face of this electrode corbel back slab top of+lateral electrode corbel back slab 52C, faced by-lateral electrode corbel back slab 50C top see time right side have protuberance 53C, faced by+lateral electrode corbel back slab 52C top see time left side there is protuberance 54C.
As shown in figure 18, Flat-type battery 50A ~ 50C has rectangular electrode corbel back slab (before cutting off corbel back slab).Cut off the part of this electrode corbel back slab and the 3 kinds of Flat-type battery 50A ~ 50C made as shown in figure 17.The method cutting off corbel back slab can consider there is various method, as shown in figure 18, it not the part (corbel back slab cuts off example 1) cutting electrode corbel back slab simply, but will integrally the prescinding of part (corbel back slab the cuts off example 2) method being helpless to engage be comprised, also can make the compact in size of the length direction of battery pack.
When manufacturing the battery pack of present embodiment, arrange Flat-type battery as shown in Figure 19 also as shown in Figure 20 that it is stacked.Specifically, as shown in figure 17, from the superiors to orlop, lamination is carried out by the order of Flat-type battery 50A, 50B, 50C, 50A, 50B, 50C, 50A, 50B.
Before stacked, the Flat-type battery shown in the dotted line with Figure 19 is combined mutually, between the electrode corbel back slab of ultrasonic bonding regulation, make unit (Unit the 1st).That is, make in advance as shown in figure 19, the unit a of combination Flat-type battery 50A and 50B, combine Flat-type battery 50C, the unit b of 50A and 50B, unit c respectively and amount to 3 unit.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab that the dotted line shown in Figure 19 with Figure 20 (left side) is connected is bonded with each other.Such as in Figure 19, make combination Flat-type battery 50A, 50B unit a time, first engage the Flat-type battery 50B being positioned at downside+the protuberance 54B of lateral electrode corbel back slab 52B and the Flat-type battery 50A that is located thereon-the protuberance 53A of lateral electrode corbel back slab 51A.In addition, make combination Flat-type battery 50C, 50A and 50B unit b, unit c time, first, engage be positioned at the Flat-type battery 50B of lower side+the protuberance 54B of lateral electrode corbel back slab 52B and the Flat-type battery 50A that is located thereon-the protuberance 53A of lateral electrode corbel back slab 51A, then, engage be positioned at Flat-type battery 50C on the upside of Flat-type battery 50A-the protuberance 53C of lateral electrode corbel back slab 51C and Flat-type battery 50A+the protuberance 54A of lateral electrode corbel back slab 52A.Just can engage in diverse position, so joining process is easy by as above sequentially carrying out joint.
When making these each unit, the insulant 40 as insulating element of regulation shape is set between electrode corbel back slab 52A and electrode corbel back slab 51B, with make to be positioned at the Flat-type battery 50A of upside+lateral electrode corbel back slab 52A not with the Flat-type battery 50B be positioned on the downside of it-lateral electrode corbel back slab 51B is electrically connected.Insulant 40 can be the parts of sheet, also can be to paste insulating tape at the lower surface (direction as shown) of electrode corbel back slab 52A.Between the electrode corbel back slab 51A of the Flat-type battery 50A of Component units b and unit c and the electrode corbel back slab 52C of Flat-type battery 50C, the insulant 40 of regulation shape is also set between the electrode corbel back slab 52A of Flat-type battery 50A and the electrode corbel back slab 51B of Flat-type battery 50B.
Then, as shown in figure 20, joint unit a and unit b and production unit α (Unit the 2nd).As shown in the figure, the joint of unit a and unit b is that the protuberance 54C of electrode corbel back slab 52C by engaging the protuberance 53B being positioned at the electrode corbel back slab 51B of the undermost Flat-type battery 50B of unit a and the Flat-type battery 50C being positioned at the unit b the superiors carries out.Certainly, when carrying out joint unit a and b, in order to avoid electrical connection between the electrode corbel back slab (52B, 51C) not carrying out the side engaged, and insulant 40 is set between electrode corbel back slab.As above when carrying out being bonded with each other of unit, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at completely by the position that other parts hinder, so joining process is easy.
Finally, joint unit α and unit c makes the battery pack of present embodiment.As shown in figure 20, the joint of unit α and unit c is engaged by the protuberance 53B of the electrode corbel back slab 51B by being positioned at the undermost Flat-type battery 50B of unit α and the protuberance 54C of electrode corbel back slab 52C of Flat-type battery 50C that is positioned at the unit c the superiors to carry out.When carrying out the joint of unit α and unit c as above, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at completely not by the position that other parts hinder, so joining process is easy.
As mentioned above, the battery pack of present embodiment, production unit a, b, c, then joint unit a, b and production unit α, then joint unit α and unit c and form battery pack, because the joint of respective unit can carry out, so joining process is easy in the position do not hindered by other electrode corbel back slabs.Therefore, add the degree of freedom of ultrasonic bonding chain-drive section shape, the automation transfiguration of joining process is easy.In addition, owing to using ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus sufficient reliability can be kept in durable reliability, maintenance.
In addition, in order to manufacture battery pack by as above order, can the Flat-type battery of stacked electrode corbel back slab shape as shown in figure 21.Flat-type battery shown in Figure 21 and Figure 20, the position of the protuberance of its respective electrode corbel back slab is contrary.That is, the position of the position of the protuberance of Flat-type battery 50a and the protuberance of the Flat-type battery 50A shown in Figure 17 is antithesis, equally, the position of the protuberance of Flat-type battery 50b, 50c also with the position of the protuberance of Flat-type battery 50B, 50C antithesis.Namely these Flat-type battery 50a ~ 50c is used, also can with the order same with the joint sequency shown in Figure 20, forming unit is while engage in order, thus easily can make battery pack.
execution mode 4
The battery pack of present embodiment be specify be combined in stacked 8 battery pack with the Flat-type battery of kind of the electrode corbel back slab shape of 4 shown in Figure 22 in cell thickness direction.The shape of the electrode corbel back slab of drawing from Flat-type battery both sides has fixing shape at its each stratification position, and during to make to engage 8 Flat-type battery in order, bonding station is positioned at different positions.Carry out engaging with the ultrasonic bonding machine 200 shown in Fig. 2 and the electrode corbel back slab of Flat-type battery is electrically connected.Under the electrode corbel back slab of battery pack state after finishing assembly, in the same manner as the Fig. 8 shown in execution mode 2, its ledge is by point to 4 directions.Battery pack 8 Flat-type battery is all connected in series under state after finishing assembly.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with the method for execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
Below, the manufacture method of the battery pack of present embodiment is described.
In order to make the bonding station of electrode corbel back slab divide to 4 directions, the battery pack of present embodiment makes the shape of the electrode corbel back slab of each Flat-type battery different corresponding to stratification position.Figure 22 represents the kind (shape of electrode corbel back slab is different) of the necessary Flat-type battery of battery pack forming present embodiment.Stacked 8 Flat-type battery form battery pack, but in the present embodiment, in order to make the bonding station of electrode corbel back slab divide to 4 directions, employ the Flat-type battery had as illustrated 4 kinds of shape electrode corbel back slabs.
The Flat-type battery 60A of A type, by-lateral electrode corbel back slab 61A and+lateral electrode corbel back slab 62A both sides respectively faced by-top of lateral electrode corbel back slab 61A and+lateral electrode corbel back slab 62A see time right side cut away a part, faced by respectively-there are protuberance 63A, 64A in left side when seeing, the top of lateral electrode corbel back slab 61A and+lateral electrode corbel back slab 62A.The Flat-type battery 60B of Type B, a part is cut away on right side when being seen on the top in the face of this electrode corbel back slab of-lateral electrode corbel back slab 61B, a part is cut away in left side when being seen on the top in the face of this electrode corbel back slab of+lateral electrode corbel back slab 62B, faced by+top of lateral electrode corbel back slab 62B see time right side there is protuberance 63B.The Flat-type battery 60C of C type, a part is cut away in left side when being seen on the top in the face of this electrode corbel back slab of-lateral electrode corbel back slab 61C, a part is cut away on right side when being seen on the top in the face of this electrode corbel back slab of+lateral electrode corbel back slab 62C, faced by-top of lateral electrode corbel back slab 61C see time right side have protuberance 63C, faced by+top of lateral electrode corbel back slab 62C see time left side have protuberance 64C.D type Flat-type battery 60D, a part is cut away in left side when being seen on the top in the face of this electrode corbel back slab of-lateral electrode corbel back slab 61D, a part is cut away in left side when being seen on the top in the face of this electrode corbel back slab of+lateral electrode corbel back slab 62D, in the face of should+top of lateral electrode corbel back slab 62D see time right side have protuberance 63D, 64D.
When manufacturing the battery pack of present embodiment, arrange Flat-type battery like that as shown in figure 23 and it is stacked.Specifically, from orlop to the superiors, come stacked by the order of the Flat-type battery 60A shown in Figure 22,60A, 60B, 60C, 60A, 60B, 60D, 60C.
Before stacked, the Flat-type battery shown in the V of Figure 23 point is combined mutually, be bonded with each other by the ultrasonic bonding electrode corbel back slab by regulation and produce unit (Unit the 1st).Namely, produce in advance as shown in figure 23, combination Flat-type battery 60A and 60B unit a, combination Flat-type battery 60C, 60A and 60B unit b, combination Flat-type battery 60D and 60C unit c amount to 3 unit.Certainly, when making these unit, between the electrode corbel back slab needing insulation, arrange insulant, this is identical with execution mode 1 ~ 3.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab that the V point shown in Figure 23 connects is bonded with each other.The concrete grammar of this joint is identical with above-mentioned execution mode 1 ~ 3, so omit its detailed description.When making each unit, can engage in diverse position, so joining process is easy.
Then, as shown in figure 23, by being bonded with each other with the electrode corbel back slab that solid line is connected of unit a and the Flat-type battery 60A be located thereon, then, the undermost Flat-type battery 60B of unit a and being bonded with each other with the electrode corbel back slab that solid line is connected of Flat-type battery 60C being positioned at the unit b the superiors will be positioned at, finally, the undermost Flat-type battery 60B of unit b and being bonded with each other with the electrode corbel back slab that solid line is connected of Flat-type battery 60D being positioned at the unit c the superiors will be positioned at.When carrying out these joints, between the electrode corbel back slab needing insulation, arrange insulant, this is identical with execution mode 1 ~ 3.Be bonded with each other by unit as above, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at completely not by the position that other parts hinder, so joining process is easy.
As mentioned above, the battery pack of present embodiment, production unit a, b, c, then Flat-type battery 60A and unit a is engaged, then unit a and unit b is engaged, further unit b and unit c engaged and form battery pack, because the joint of unit can carry out, so joining process is easy in the position do not hindered by other electrode corbel back slabs.Therefore, add the degree of freedom of the nose shape of ultrasonic bonding machine, the automation transfiguration of joining process is easy.In addition, use ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus sufficient reliability can be kept in durable reliability, maintenance.
execution mode 5
The battery pack of present embodiment be the combination that specifies along cell thickness direction stacked 8 there are 6 kinds of Flat-type battery of the different electrode corbel back slab combination of length as of fig. 24.The length of the electrode corbel back slab of drawing from the both sides of Flat-type battery has fixing length at each stratification position, is positioned at different positions to make its bonding station when 8 Flat-type battery being engaged in order.It is made to be electrically connected by being engaged by the electrode corbel back slab of Flat-type battery with ultrasonic bonding machine 200 as shown in Figure 2.The electrode corbel back slab of battery pack is divided into 3 kinds of length, to make in the process of composition battery pack, can engage in order from short electrode corbel back slab to long electrode corbel back slab.The state that battery pack is being assembled, 8 Flat-type battery are all connected in series.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
Below, the manufacture method of the battery pack of present embodiment is described.
The battery pack of present embodiment divides 3 positions at length direction to make the bonding station of electrode corbel back slab, makes the combination of the length of the electrode corbel back slab of each Flat-type battery different corresponding to stratification position.Figure 24 represents the kind (length of electrode corbel back slab is different) of the necessary Flat-type battery of battery pack forming present embodiment.Forming although battery pack is stacked 8 Flat-type battery, in the present embodiment, in order to make the bonding station of electrode corbel back slab divide 3 positions at length direction, employing 6 kinds of Flat-type battery that length combination is as shown in the figure different.
The Flat-type battery 70A of A type, make-lateral electrode corbel back slab 71A and+length of lateral electrode corbel back slab 72A and the Flat-type battery of its alloytype are in a ratio of the shortest.The Flat-type battery 70B of Type B have with A type-lateral electrode corbel back slab 71A equal length-lateral electrode corbel back slab 71B, and have than A type+length of lateral electrode corbel back slab 72A long+lateral electrode corbel back slab 72B.The Flat-type battery 70C of C type have with Type B+lateral electrode corbel back slab 72B equal length-lateral electrode corbel back slab 71C, and have with Type B-lateral electrode corbel back slab 71B equal length+lateral electrode corbel back slab 72C.D type-length of lateral electrode corbel back slab 71D and+lateral electrode corbel back slab 72D and Type B+72B is identical for lateral electrode corbel back slab.E type-lateral electrode corbel back slab 71E have with Type B+length that lateral electrode corbel back slab 72B is identical, the length of the electrode corbel back slab of the length of+lateral electrode corbel back slab 72E and the Flat-type battery of its alloytype is in a ratio of the longest.The Flat-type battery 70F of F type have with E type+lateral electrode corbel back slab 72E equal length-the electrode corbel back slab 71F of side, and have with Type B+lateral electrode corbel back slab 72B equal length+lateral electrode corbel back slab 72F.
When manufacturing the battery pack of present embodiment, arrange Flat-type battery as shown in fig. 25 also such that it is stacked as shown in figure 26.Specifically, from the superiors to orlop, undertaken stacked by the order of the Flat-type battery 70A shown in Figure 24,70C, 70D, 70F, 70E, 70C, 70B, 70A.
Before stacked, the Flat-type battery shown in the dotted line of Figure 25 is combined mutually, be bonded with each other by the ultrasonic bonding electrode corbel back slab by regulation and produce unit (Unit the 1st).That is, make in advance as shown in figure 25, combination have unit a, the combination Flat-type battery 70B of the Flat-type battery 70A of the shortest electrode corbel back slab and 70C, 70A unit b this amount to 2 unit.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab that the dotted line shown in Figure 25 with Figure 26 (left side) is connected is bonded with each other.Such as in fig. 25, make combination Flat-type battery 70A, 70C unit a time, by Flat-type battery 70A-lateral electrode corbel back slab 71A and Flat-type battery 70C+lateral electrode corbel back slab 72C engages.In addition, make combination Flat-type battery 70B, 70A unit b time, by Flat-type battery 70B-lateral electrode corbel back slab 71B and Flat-type battery 70A+lateral electrode corbel back slab 72A engages.Carry out joint by above order and just easily can carry out joining process.
When making these each unit, the insulant 40 as insulating element of regulation shape is set between electrode corbel back slab 72A and electrode corbel back slab 71C, with make to be positioned at the Flat-type battery 70A of upside+lateral electrode corbel back slab 72A not with the Flat-type battery 70C be positioned on the downside of it-lateral electrode corbel back slab 71C is electrically connected.Insulant 40 can be the parts of sheet, also can be to paste insulating tape at the lower surface (direction as shown) of electrode corbel back slab 72A.The insulant 40 of regulation shape is also set between the electrode corbel back slab 72B of the Flat-type battery 70B of Component units b and the electrode corbel back slab 71A of Flat-type battery 70A.
Then, as illustrated in figs. 25 and 26, engage Flat-type battery 70D at unit a, engage Flat-type battery 70C and production unit α and unit β (Unit the 2nd) at unit b.As shown in the figure, be undertaken by the electrode corbel back slab 72D of the electrode corbel back slab 71C with Flat-type battery 70D that are positioned at the undermost Flat-type battery 70C of unit a is engaged for the unit a of production unit α with the joint between Flat-type battery 70D.Certainly, when carrying out the joint between unit a and Flat-type battery 70D, in order to avoid electrical connection between the electrode corbel back slab (72C, 71D) not carrying out the side engaged, insulant 40 is set between electrode corbel back slab.When carrying out the joint between unit a and Flat-type battery 70D as above, then due to Flat-type battery 70A+length of lateral electrode corbel back slab 72A than Flat-type battery 70C-length of lateral electrode corbel back slab 71C is short, so electrode corbel back slab 72A can not be touched, the joint between electrode corbel back slab 71C and electrode corbel back slab 72D can be carried out.In addition, based on same reason, also the joint between the electrode corbel back slab 72B of the Flat-type battery 70B of Component units b and the electrode corbel back slab 71C of Flat-type battery 70C can not carried out with hindering by other electrode corbel back slabs (71A) completely.
Then, engage Flat-type battery 70F at unit α, engage Flat-type battery 70E and production unit X and unit Y (Unit the 3rd) at unit β.As shown in the figure, for production unit X, unit α and the joint between Flat-type battery 70F to engage with the electrode corbel back slab 71F of Flat-type battery 70F by the electrode corbel back slab 71D of the undermost Flat-type battery 70D by being positioned at unit α to carry out.Certainly, when carrying out the joint of unit α and Flat-type battery 70F, in order to prevent from not carrying out the side engaged electrode corbel back slab (72D, 71F) between electrical connection, insulant 40 is set between electrode corbel back slab.When carrying out the joint of unit α and Flat-type battery 70F as described above, then because the length of electrode corbel back slab 71D and electrode corbel back slab 72F is greater than the length of electrode corbel back slab 71A, 72C, so can not contact with the electrode corbel back slab 72C of the electrode corbel back slab 71A of the Flat-type battery 70A of Component units α, Flat-type battery 70C, the joint between electrode corbel back slab 71D and electrode corbel back slab 72F just can be carried out.In addition, based on same reason, also can ground do not hindered to carry out the joint of the electrode corbel back slab 72C of the Flat-type battery 70C of Component units β and the electrode corbel back slab 71E of Flat-type battery 70E by other electrode corbel back slabs (71B, 72A) completely.
Finally, joint unit X and unit Y and make the battery pack of present embodiment.As shown in figure 26, unit X and the joint of unit Y are undertaken by being engaged with the electrode corbel back slab 72E of the Flat-type battery 70E being positioned at the unit Y the superiors by the electrode corbel back slab 71F being positioned at the undermost Flat-type battery 70F of unit X.The length of electrode corbel back slab 70F and electrode corbel back slab 70E is greater than the length of other any electrode corbel back slabs, so its joint can not hinder ground to carry out by other electrode corbel back slabs, its joining process is easy.
As mentioned above, the battery pack of present embodiment, production unit a, b, then production unit α, β, then production unit X, Y, battery pack is formed, because the joint of each unit can carry out, so joining process is easy in the position do not hindered by other electrode corbel back slabs finally by joint unit X and Y.Therefore, the degree of freedom adding the nose shape of ultrasonic bonding machine increases, and the automation transfiguration of joining process is easy.In addition, use ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus sufficient reliability can be had in durable reliability, maintenance.
execution mode 6
The battery pack of present embodiment be the combination that specifies along cell thickness direction stacked 8 there are 3 kinds of Flat-type battery of the different electrode corbel back slab combination of length as shown in figure 27.The shape of the electrode corbel back slab of drawing from the both sides of Flat-type battery has fixing shape at each stratification position, is positioned at different positions to make its bonding station when 8 Flat-type battery being engaged in order.It is made to be electrically connected by engaging the electrode corbel back slab of Flat-type battery with ultrasonic bonding machine 200 as shown in Figure 2.The electrode corbel back slab of battery pack is divided into 2 kinds of length, to make to engage in order from short electrode corbel back slab to long electrode corbel back slab in the process of composition battery pack.The state that battery pack is being assembled, 8 Flat-type battery are all connected in series.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
The following describes the manufacture method of the battery pack of present embodiment.
In order to the bonding station of electrode corbel back slab being divided into 2 positions of length direction, the battery pack of present embodiment makes the combination of the electrode corbel back slab length of each Flat-type battery different corresponding to stratification position.Figure 27 represents the kind (length of electrode corbel back slab is different) forming the necessary Flat-type battery of present embodiment battery pack.Although stacked 8 Flat-type battery of battery pack form, in the present embodiment, in order to the bonding station of electrode corbel back slab being divided into 2 positions of length direction, employ 3 kinds of Flat-type battery that length combination is as shown in the figure different.
The Flat-type battery 80A of A type, its-lateral electrode corbel back slab 81A and+length of lateral electrode corbel back slab 82A and the Flat-type battery of its alloytype are in a ratio of the shortest.The Flat-type battery 80B of Type B have with A type+lateral electrode corbel back slab 82A equal length-lateral electrode corbel back slab 81B, and have than A type+length of lateral electrode corbel back slab 81A and-lateral electrode corbel back slab 82A long+lateral electrode corbel back slab 82B.The Flat-type battery 80C of C type have with Type B+lateral electrode corbel back slab 82B equal length-lateral electrode corbel back slab 81C, and have with Type B-lateral electrode corbel back slab 81B equal length+lateral electrode corbel back slab 82C.
When manufacturing the battery pack of present embodiment, arrange as shown in figure 28 and stacked flat type battery like that.Specifically, press from the superiors to orlop the Flat-type battery 80A shown in Figure 27,80B, 80C, 80A, 80A, 80B, 80C, 80A order come stacked.
Before stacked, mutually combining Figure 28 by the Flat-type battery shown in solid line, is bonded with each other with the ultrasonic bonding electrode corbel back slab by regulation and produces unit (Unit the 1st).Namely, as shown in the step 1 of Figure 28, make in advance combination Flat-type battery 80A and 80B unit a, combination Flat-type battery 80C, 80A unit b, combination Flat-type battery 80A and 80B unit c, combination Flat-type battery 80C and 80A unit d this amount to 4 unit.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab that the solid line shown in Figure 28 (left side) connects is bonded with each other.Such as in Figure 28, when making unit a and the unit c of combination Flat-type battery 80A and 80C, joint Flat-type battery 80A+lateral electrode corbel back slab 82A and Flat-type battery 80B-lateral electrode corbel back slab 81B.In addition, when making unit b and the d of combination Flat-type battery 80C and 80A, joint Flat-type battery 80C+lateral electrode corbel back slab 82C and Flat-type battery 80A-lateral electrode corbel back slab 81A.Although not diagram, when making each unit, arranges insulant at the electrode corbel back slab not carrying out the side engaged.
Then, as shown in the step 2 of Figure 28, respectively linkage unit a and unit b, unit c and unit d and production unit e, unit f.As shown in the figure, the joint of unit a and unit b and unit c and the joint of unit d to be engaged with the electrode corbel back slab 81C of the Flat-type battery 80C being positioned at unit b, d upper strata by the electrode corbel back slab 82B of the Flat-type battery 80B by being positioned at unit a, c lower floor to carry out.In being bonded with each other of these unit, in order to avoid electrical connection between the electrode corbel back slab not carrying out the side engaged, not shown insulant is set between electrode corbel back slab.As mentioned above, when carrying out the joint of unit a and b or unit c and d, then due to Flat-type battery 80B+lateral electrode corbel back slab 82B and Flat-type battery 80C-length of lateral electrode corbel back slab 81C be greater than Flat-type battery 80A-length of lateral electrode corbel back slab 81A, so can not contact with electrode corbel back slab 81A and the joint between electrode corbel back slab 82B and electrode corbel back slab 81C can be carried out.
Finally, joint unit e and unit f and make the battery pack of present embodiment.
As shown in figure 28, the joint of unit e and unit f is by being carried out with the electrode corbel back slab 81A joint of the Flat-type battery 80A being positioned at the unit f the superiors by the electrode corbel back slab 82A being positioned at the undermost Flat-type battery 80A of unit e.
As mentioned above, the battery pack of present embodiment, production unit a, b, c, d, then production unit e, f, last joint unit e and f, thus formation battery pack, until joint unit e and f joint can not by other electrode corbel back slabs hinder position on carry out, so joining process is easy.
execution mode 7
The battery pack of present embodiment be the combination that specifies along cell thickness direction stacked 8 there is the Flat-type battery of kind of the electrode corbel back slab shape of 7 shown in Figure 29.The shape of the electrode corbel back slab of drawing from Flat-type battery both sides has the solid shape changing its length and shape at each stratification position, to make when engaging 8 Flat-type battery in order, its bonding station is positioned at different positions.It is made to be electrically connected by engaging the electrode corbel back slab of Flat-type battery with the ultrasonic bonding machine 200 shown in Fig. 2.The state that the electrode corbel back slab of battery pack is being assembled, its ledge is divided into 2 directions.The state that battery pack is being assembled, 8 Flat-type battery are all connected in series.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
The following describes the manufacture method of the battery pack of present embodiment.
The battery pack of present embodiment, for making the bonding station of electrode corbel back slab not overlapping, is divided into 2 directions by the bonding station of electrode corbel back slab, and makes the bonding station of electrode corbel back slab different at the length direction of battery.For this reason, the shape of the electrode corbel back slab of each Flat-type battery is different corresponding to stratification position with length.Figure 29 represents the kind (shape of electrode corbel back slab is different) forming the necessary Flat-type battery of present embodiment battery pack.Forming although battery pack is stacked 8 Flat-type battery, in the present embodiment, in order to make the bonding station of electrode corbel back slab be dispersed in 4 places, using the Flat-type battery of the electrode corbel back slab of the 7 kinds of shapes had as shown in the figure.
The Flat-type battery 90A of A type ,-lateral electrode corbel back slab 91A and+length of lateral electrode corbel back slab 92A and the Flat-type battery of its alloytype are in a ratio of the shortest.The Flat-type battery 90B of Type B, have with A type-lateral electrode corbel back slab 91A equal length-lateral electrode corbel back slab 91B, and have than A type+length of lateral electrode corbel back slab 92A long+lateral electrode corbel back slab 92B.The Flat-type battery 90C of C type, have with Type B+lateral electrode corbel back slab 92B equal length-lateral electrode corbel back slab 91C and+lateral electrode corbel back slab 92C, but a part of+lateral electrode corbel back slab 92C is cut and form protuberance 94C.D type Flat-type battery 90D, have with Type B+lateral electrode corbel back slab 92B equal length-lateral electrode corbel back slab 91D and with Type B-lateral electrode corbel back slab 91B equal length+lateral electrode corbel back slab 92D, but a part of-lateral electrode corbel back slab 91D is cut and form protuberance 93D.The Flat-type battery 90E of E type, have with Type B+lateral electrode corbel back slab 92B equal length+lateral electrode corbel back slab 92E and with Type B-lateral electrode corbel back slab 91B equal length-the electrode corbel back slab 91E of side, but a part of+lateral electrode corbel back slab 92E is cut and form protuberance 94E.F type Flat-type battery 90F, have with Type B+lateral electrode corbel back slab 92B equal length-lateral electrode corbel back slab 91F and+lateral electrode corbel back slab 92F, but a part of-lateral electrode corbel back slab 91F is cut and form protuberance 93F.The Flat-type battery 90G of G type have with A type-lateral electrode corbel back slab 91A equal length+lateral electrode corbel back slab 91G, also have with Type B+lateral electrode corbel back slab 92B equal length-lateral electrode corbel back slab 91G.
When manufacturing the battery pack of present embodiment, arrange Flat-type battery as shown in figure 30 like that also such that it is stacked as shown in figure 31.Specifically, press from the superiors to orlop the Flat-type battery 90A shown in Figure 17,90G, 90F, 90E, 90D, 90C, 90B, 90A order come stacked.
Before stacked, the Flat-type battery shown in the dotted line of Figure 30 is combined mutually, be bonded with each other with the ultrasonic bonding electrode corbel back slab by regulation and produce unit.That is, produce in advance as shown in figure 30, combination Flat-type battery 90A, 90G and 90F unit a, combination Flat-type battery 90E and 90D unit b, combination Flat-type battery 90C, 90B and 90A unit c this amount to 3 unit.
When making each unit, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab be connected with the dotted line shown in Figure 30 with Figure 31 (left side) is bonded with each other.Such as in fig. 30, make combination Flat-type battery 90A, 90G and 90F unit a time, first engage be positioned at the Flat-type battery 90F of lower side+lateral electrode corbel back slab 92F and the Flat-type battery 90G that is located thereon-lateral electrode corbel back slab 91G.Then, engage be positioned at Flat-type battery 90G+lateral electrode corbel back slab 92G and the Flat-type battery 90A that is located thereon-lateral electrode corbel back slab 91A.In addition, during production unit B, engage Flat-type battery 90D+lateral electrode corbel back slab 92D and the Flat-type battery 90E that is located thereon-lateral electrode corbel back slab 91E.And during production unit C, engage be positioned at the Flat-type battery 90A of lower side+lateral electrode corbel back slab 92A and the Flat-type battery 90B that is located thereon-lateral electrode corbel back slab 91B.Then, engage Flat-type battery 90B+lateral electrode corbel back slab 92B and the Flat-type battery 90C that is located thereon-lateral electrode corbel back slab 91C.Engage by above order, then can ground do not hindered to engage, the electrode corbel back slab be bonded with each other so joining process is easy by other electrode corbel back slabs completely.When making each unit, as shown in the figure, insulant 40 is set between the electrode corbel back slab not carrying out the side engaged.Insulant 40 can be the parts of sheet, also can be to paste insulating tape at the lower surface (direction as shown) of electrode corbel back slab.
Then, as shown in figure 31, joint unit a, b, c make the battery pack of present embodiment.The joint of unit a and unit b by by be positioned at the undermost Flat-type battery 90F of unit a-lateral electrode corbel back slab 91F protuberance 93F and be positioned at Flat-type battery 90E on the upside of unit b+the protuberance 94E of lateral electrode corbel back slab 92E engages and carries out, in addition, the joint of unit b and unit c be by by the Flat-type battery 90D be positioned on the downside of unit b-the protuberance 93D of lateral electrode corbel back slab 91D and be positioned at the unit c the superiors Flat-type battery 90C+the protuberance 94C of lateral electrode corbel back slab 92C engages and carries out.Certainly, when carrying out the joint of these unit, as shown in the figure, do not carried out arranging insulant 40 between the electrode corbel back slab of the side engaged.Carry out the joint of unit a, b, c as above, then given prominence to than electrode corbel back slab 91A, 92G by the protuberance 93F of electrode corbel back slab 91F that is bonded with each other and the protuberance 94E of electrode corbel back slab 92E, and given prominence to than electrode corbel back slab 91B, 92A by the protuberance 93D of electrode corbel back slab 91D that is bonded with each other and the protuberance 94C of electrode corbel back slab 92C, and protuberance 93F is different from the bonding station of protuberance 93D and protuberance 94D with the bonding station of protuberance 94E, so the electrode corbel back slab that can ground do not hindered will to carry out engaging by other electrode corbel back slabs completely engages.
As mentioned above, the battery pack of present embodiment, production unit a, b, c, then engage these unit and form battery pack, and the joint of unit can carry out, so joining process is easy on the position do not hindered by other electrode corbel back slabs.Therefore, add the degree of freedom of the nose shape of ultrasonic bonding machine, the automation transfiguration of joining process is easy.In addition, use ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus sufficient reliability can be kept in durable reliability, maintenance.
execution mode 8
The battery pack of present embodiment be specify be combined in cell thickness direction stacked 8 as shown in figure 32,6 kinds of Flat-type battery that the extraction location of electrode corbel back slab is different.From the extraction location difference of the electrode corbel back slab that Flat-type battery is drawn, during to make to engage 8 Flat-type battery in order, its bonding station is positioned at different positions.It is made to be electrically connected by being engaged by the electrode corbel back slab of Flat-type battery with ultrasonic bonding machine 200 as shown in Figure 2.The state that the electrode corbel back slab of battery pack is being assembled, its ledge is by point to 4 directions.The state that battery pack is being assembled, 8 Flat-type battery are all connected in series.
In addition, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
Below, the manufacture method of the battery pack of present embodiment is described.
In order to be divided by the bonding station of electrode corbel back slab to 4 directions, the battery pack of present embodiment makes the extraction location of the electrode corbel back slab of each Flat-type battery different corresponding to stratification position.Figure 32 represents the kind (extraction location of electrode corbel back slab is different) of the necessary Flat-type battery of battery pack forming present embodiment.Although stacked 8 Flat-type battery and form battery pack, in the present embodiment, in order to be divided by the bonding station of electrode corbel back slab to 4 directions, use the Flat-type battery of the electrode corbel back slab with 6 kinds of such extraction locations of diagram.
Flat-type battery 95A and 95H, its-lateral electrode corbel back slab 97A, 97H and+lateral electrode corbel back slab 96A, 96H draw from the both sides of Flat-type battery 95A and 95H.Flat-type battery 95B, 95C, 95F and 95G, its-lateral electrode corbel back slab 97B, 97C, 97F, 97G and+lateral electrode corbel back slab 96B, 96C, 96F, 96G be adjacent to derivative.Flat-type battery 95D and 95E, its-electrode corbel back slab 97D, 97E and+side 96D, 96E are that to separate certain intervals ground derivative.
When manufacturing the battery pack of present embodiment, first, engage Flat-type battery 95A+lateral electrode corbel back slab 96A and Flat-type battery 95B-lateral electrode corbel back slab 97B and production unit a, engage its Flat-type battery 95C+lateral electrode corbel back slab 96C and Flat-type battery 95D-lateral electrode corbel back slab 97D and production unit b, engage Flat-type battery 95E+lateral electrode corbel back slab 96E and Flat-type battery 95F-lateral electrode draws 97F and production unit c, engage Flat-type battery 95G+lateral electrode corbel back slab 96G and Flat-type battery 95H-lateral electrode corbel back slab 97H and production unit d.When making each unit, can engage in diverse position, so joining process is easy.
Then, lamination unit a, b, joint Flat-type battery 95B+lateral electrode corbel back slab 96B and Flat-type battery 95C-lateral electrode corbel back slab 97C.Now, Flat-type battery 95B-lateral electrode corbel back slab 97B and Flat-type battery 95C+lateral electrode corbel back slab 96C between insulant is set.Equally, lamination unit c, d, joint Flat-type battery 95F+lateral electrode corbel back slab 96F and Flat-type battery 95G-lateral electrode corbel back slab 97G.Now, Flat-type battery 95F-lateral electrode corbel back slab 97F and Flat-type battery 95G+lateral electrode corbel back slab 96G between insulant is set.
Finally, engage Flat-type battery 95D+lateral electrode corbel back slab 96D and Flat-type battery 95E-lateral electrode corbel back slab 97E, lamination unit a ~ d.Now, Flat-type battery 95C-lateral electrode corbel back slab 97C and Flat-type battery 95F+lateral electrode corbel back slab 96F between insulant is set.In addition, when carrying out these joint, the situation arranging insulant between the electrode corbel back slab needing insulation is identical with execution mode 1 ~ 3.Carry out being bonded with each other of unit as above, then the protuberance becoming the electrode corbel back slab of coalesced object is positioned at completely not by the position that other parts hinder, so joining process is easy.
As above, the battery pack of present embodiment, production unit a, b, c, d, then joint unit a and unit b, rejoin unit c and unit d, finally engage all unit and form battery pack, the joint due to unit can carry out, so joining process is easy on the position do not hindered by other electrode corbel back slabs.Therefore, add the degree of freedom of the nose shape of ultrasonic bonding machine, the automation transfiguration of joining process is easy.In addition, use ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus, sufficient reliability can be kept in durable reliability, maintenance.
execution mode 9
The battery pack of present embodiment be the mode that is connected with+lateral electrode corbel back slab and-lateral electrode corbel back slab along cell thickness direction stacked 16 as shown in figure 33, have with the round-shaped Flat-type battery of the electrode corbel back slab of regulation central angle configuration.
As shown in the figure, the Flat-type battery 400 of present embodiment, the shape seen from stacked direction is round-shaped, + lateral electrode corbel back slab 410A is configured relative to-lateral electrode corbel back slab 410B with having the central angle of 157.5 °, make this+and lateral electrode corbel back slab 410A is from the diameter offset being basic point with electrode corbel back slab 410B.There is the Flat-type battery 400 of the electrode corbel back slab of so mutual offset position relation, in the stacking direction overlapping stacked its+lateral electrode corbel back slab and-lateral electrode corbel back slab.The configuration status of electrode corbel back slab during 3 Flat-type battery 400 that Figure 34 has represented stacked.Be positioned at the Flat-type battery 400 +lateral electrode corbel back slab 410A, the overlapping Flat-type battery 400 be laminated thereon-lateral electrode corbel back slab 410D; Flat-type battery 400 after stacked+lateral electrode corbel back slab 410C on the overlapping Flat-type battery 400 be laminated thereon-lateral electrode corbel back slab 410F.When so stacked 16 Flat-type battery 400, electrode corbel back slab is given prominence to from 16 equational splits of Flat-type battery 400 peripheral part.In this state, with the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab at 14 places except the electrode corbel back slab at 2 places except being used for extraction voltage is engaged.When engaging, battery being rotated, carrying out the location of the electrode corbel back slab of joining tool and battery peripheral direction, while carry out the location of the above-below direction of joining tool, carry out electrode corbel back slab to be in groups bonded with each other.Thus, all Flat-type battery 400 are connected in series.
In the present embodiment, then the battery pack that formed like this of laminated multi-layer (such as 6 layers) and as battery assembly module 450, clamp this unit with the shell 420A, the 420B that split such as shown in Figure 35 and Figure 36 from both sides and be fixed.Engaged electrode corbel back slab 410 is given prominence to from the peripheral part of battery assembly module 450, but at 420A, 420B, the connector 430 with quantity corresponding to the position corresponding with this electrode corbel back slab is installed, when shell 420A, 420B being installed on battery assembly module 450, all electrode corbel back slabs 410 embed this connector.In addition, connector is arranged in order to the voltage detecting of each Flat-type battery 400, and all connectors are connected with holding wire 435, can go out the voltage of each Flat-type battery from external detection.So, when being provided with connector 430 on shell 420A, 420B, then not needing the wiring operation of the holding wire carried out for carrying out voltage detecting, assembling operation efficiency can be improved significantly.
Further, as shown in Figure 37, Figure 38, cut on the top of shell 420A, 420B and have for installing the screw thread 465 adding gland 460, this adds gland 460 for applying the surface pressing of stacked direction to all Flat-type battery 400.As shown in figure 36, battery assembly module 450 is housed in shell 420A, 420B, as shown in figure 38, makes the screw thread the adding gland 460 incompatible installation that connects with screw thread 465 add gland 460.Rotation adds gland 460 makes it tighten, then Flat-type battery 400 is applied in the surface pressing of stacked direction as shown in Figure.Such applying surface pressing, can extend the life-span of battery assembly module 450.This is because: when using Flat-type battery 400, along with the change in elapsed time produces gas therein, if but apply surface pressing, just the gas of this generation can be arrived in the peripheral part of Flat-type battery 400.As surface pressing preferably 0.15Kgf/cm 2the pressure of left and right.Thus, in the present embodiment, be about 120Kgf by adding the surface pressing that gland 460 applies.
Then, in order to make cooling air circulate in battery assembly module 450, the cooling shell 480 as shown in Figure 39 and Figure 40 is installed.Although do not illustrate, when forming battery assembly module 450, when layer-built battery group and battery pack, cooling dividing plate 470 is set in-between above.Formed at dividing plate 470 and manyly make air therein to the through hole of direction circulation.In addition, as shown in the figure, air introducing port 485 and air outlet 490 is formed with at cooling shell 480.Figure 40 (A) is the A-A cutaway view of the Figure 39 of the position relationship represented between cooling shell 480 and Flat-type battery 400, and Figure 40 (B) is the B-B cutaway view of the Figure 39 of the position relationship represented between cooling shell 480 and dividing plate 470.Air introducing port 485 and air outlet 490 are respectively formed at the position shown in Figure 40 (B).Thus as shown in figure 39, battery assembly module 450 is inserted in cooling shell 480, and carries air to air introducing port 485, then the air be transferred reaches air outlet 490 by the through hole of each dividing plate 470.Because two surfaces of dividing plate 470 are directly closely attached to Flat-type battery 400, so carry out cooling flat type battery by the air being supplied to cooling shell 480.
Figure 41 is the cutaway view of the battery of present embodiment.
As shown in the figure, contain in cooling shell 480 inside the battery assembly module 450 be contained in shell 420.Battery assembly module 450 arranges 5 dividing plates and stacked formation between 6 battery pack.Be arranged on the connector on shell 420 and the electrode corbel back slab auto-alignment when mounted given prominence to from battery pack peripheral part.Be provided with at shell 420 and add gland 460, the Flat-type battery forming battery pack at stacked direction by with suitable exert pressure.Be formed with air introducing port 485 and air outlet 490 at cooling shell 480, as shown in the figure, the air supplied from air introducing port 485 is discharged from air outlet 490 by all dividing plates 470.
The battery of this spline structure is such as equipped on vehicle, carries the method for this battery, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted on vehicle
In addition, in the present embodiment, be circular expression for the shape of Flat-type battery, but certainly can apply the polygonal Flat-type battery such as pentagon or hexagon.Self-evident, in polygonal situation, do not establish electrode corbel back slab on relative limit, and make one-sided electrode corbel back slab be biased as in the present embodiment.
execution mode 10
Figure 42 is the outside drawing of the execution mode 10 of battery pack of the present invention.
The battery pack 500 of present embodiment makes the mode of the alternating polarity of electrode corbel back slab stacked 8 Flat-type battery along cell thickness direction, formed by the folding a series of battery multiple Flat-type battery being connected into sheet.The battery pack 500 of present embodiment has such structure: when stacked all Flat-type battery, electrode corbel back slab for Flat-type battery being mutually connected in series is in multiple positions of battery pack, by engaging respective electrode corbel back slab, all Flat-type battery is electrically connected in series.Specifically, as shown in figure 43, it is rectangle that Flat-type battery is overlooked when seeing, the junction surface of electrode corbel back slab is configured to: after string of cells (8 Flat-type battery be connected by not having the limit of electrode corbel back slab to be connected with the battery be adjacent are formed) the folded end of sheet, the junction surface of electrode corbel back slab is in the mutual staggered positions of the Width of Flat-type battery.Therefore, the extraction location of the electrode corbel back slab of drawing from the both sides of each Flat-type battery forming small disc type batteries is different at its each stratification position, and during to have made 8 Flat-type battery stacked, each electrode corbel back slab is in groups divided to 4 directions.In present embodiment, in order to make the bonding station of electrode corbel back slab be divided into 4 directions, use 8 kinds of Flat-type battery from diverse location extraction electrode corbel back slab.
With the ultrasonic bonding machine 200 shown in Fig. 2, the electrode corbel back slab of Flat-type battery engaged and make it be electrically connected.In the state of stacked end, as shown in figure 42, its outstanding part of electrode corbel back slab of battery pack is divided to 4 directions.The state that battery pack is being assembled, 8 Flat-type battery are all connected in series.
In the battery pack of present embodiment, can separate unduplicated 4 positions in the stacking direction carry out stacked after all Flat-type battery electricity engage, so directly can engage all Flat-type battery under stacked state, not only workability is good, and the automation of joining process is easy.Further, also can not apply unnecessary stress to the electrode corbel back slab engaged, and not use the mechanical engagement part of bolt and nut, packing ring etc., so excellent in durable reliability, maintainability.
In addition, in the present embodiment, on vehicle, the method for completed battery pack is carried, by identical with execution mode 2 for interconnective for battery pack method, so the description thereof will be omitted.
Below, the manufacture method of the battery pack of present embodiment is described.
As outlined above, as shown in figure 42, its battery not having the limit of electrode corbel back slab to be adjacent together of the Flat-type battery of the sheet of present embodiment is connected successively and is connected, and each battery is from different position extraction electrode corbel back slabs.As shown in the figure, on accompanying drawing, draw+electrode corbel back slab 512A from the left upper end of Flat-type battery 510A, from its bottom righthand side extraction-electrode corbel back slab 514A.From the lower-left end extraction+electrode corbel back slab 521B of Flat-type battery 510B, in its upper left side from the position extraction-electrode corbel back slab 514B that offset electrodes corbel back slab width+α to the inside measures.Draw respectively from the upper side and lower side of Flat-type battery 510C and 510G from only offset by the position that electrode corbel back slab width+α measures to the inside+electrode corbel back slab 512C, 512G and-electrode corbel back slab 514C, 514G.In the upside of Flat-type battery 510D from its center extraction-electrode corbel back slab 514D, in downside from the position extraction+electrode corbel back slab 512D that only offset by electrode corbel back slab width+α amount to the inside.From center extraction+electrode corbel back slab 512E and the-electrode corbel back slab 514E of the upper side and lower side of Flat-type battery 510E.In the downside of Flat-type battery 510F, from its center extraction+electrode corbel back slab 512F, in upside, from the position extraction-electrode corbel back slab 514F that offset electrodes corbel back slab width+α to the inside measures.-electrode corbel back slab 514H is drawn, in its lower right side, from the position extraction+electrode corbel back slab 514H that only offset by electrode corbel back slab width+α amount to the inside from the left upper end of Flat-type battery 510H.
As shown in Figure 44 (a), the battery of having drawn electrode corbel back slab from above position is folded into zigzag, then as shown in figure 42, each Flat-type battery+electrode corbel back slab and-electrode corbel back slab is at different location overlaps.Specifically, electrode corbel back slab 514A and 512B is overlapping in groups, electrode corbel back slab 514C and 512D is overlapping in groups, electrode corbel back slab 514E and 512F is overlapping in groups, electrode corbel back slab 512G and 512H is overlapping in groups, electrode corbel back slab 514B and 512C is overlapping in groups, and electrode corbel back slab 514D and 512E is overlapping in groups, and electrode corbel back slab 514F and 512G is overlapping in groups.
In this state, in groups+and-electrode corbel back slab be not also engaged, so by as shown in figure 42 like that the battery of overlap condition take ultrasonic bonding machine 200 to, engage electrode corbel back slab in groups in order.
When forming battery pack as above, then the joint of each electrode corbel back slab can be carry out, so joining process is easy on the position do not hindered by other electrode corbel back slabs.Therefore, add the nose shape degree of freedom of ultrasonic bonding machine, the automation transfiguration of joining process is easy.In addition, owing to using ultrasonic wave to engage, there is not mechanical engagement part, thus can not produce contact resistance uneven or because of vibration cause lax, thus, sufficient reliability can be kept in durable reliability, maintenance.
In addition, as shown in Figure 44 (a), although be folded into zigzag and the situation forming battery pack being explained above, also can be wound in web-like stacked as Suo Shi Figure 44 (b), the formation of battery pack can be carried out equally.
In addition, the invention is not restricted to above-mentioned execution mode, certainly can carry out various change within the scope of the claims.
And, the application is No. 2004-161299, the Japanese Patent application number according to application on May 31st, 2004, No. 2004-363123, the Japanese Patent application number of application on December 15th, 2004 and No. 2005-068230, the Japanese patent application No. of application on March 10th, 2005, with reference to its disclosure, and its entirety is enrolled.

Claims (1)

1. a battery pack, it is that stacked multiple Flat-type battery stacked Flat-type battery being one another in series with the different electrode corbel back slab of polarity is formed by connecting, and it is characterized in that,
Comprise stacked multiple above-mentioned Flat-type battery and the unit above-mentioned Flat-type battery be connected in series,
In each said units, from above-mentioned stacked direction, the electrode corbel back slab of junction surface outside two the electrode corbel back slabs be connected in series connected that above-mentioned Flat-type battery be one another in series staggers,
Said units is one another in series connect junction surface be in joining process completely by other electrode corbel back slabs hinder position.
CN200910001525.6A 2004-05-31 2005-05-30 Battery pack and manufacture method thereof Active CN101459233B (en)

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JP2004161299 2004-05-31
JP2004-161299 2004-05-31
JP2004161299 2004-05-31
JP2004-363123 2004-12-15
JP2004363123 2004-12-15
JP2004363123 2004-12-15
JP2005-068230 2005-03-10
JP2005068230A JP2006196428A (en) 2004-05-31 2005-03-10 Battery pack and its manufacturing method
JP2005068230 2005-03-10
CNB2005800177284A CN100477336C (en) 2004-05-31 2005-05-30 Battery pack and manufacturing method thereof

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CN105655532A (en) * 2014-11-10 2016-06-08 宁德时代新能源科技股份有限公司 Battery pack and stacking method thereof
CN105977546A (en) * 2015-10-26 2016-09-28 乐视移动智能信息技术（北京）有限公司 Battery core
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