CN201994381U - Bipolar secondary battery - Google Patents
Bipolar secondary battery Download PDFInfo
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- CN201994381U CN201994381U CN2011200678628U CN201120067862U CN201994381U CN 201994381 U CN201994381 U CN 201994381U CN 2011200678628 U CN2011200678628 U CN 2011200678628U CN 201120067862 U CN201120067862 U CN 201120067862U CN 201994381 U CN201994381 U CN 201994381U
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- collector plate
- electrode active
- key element
- bipolar
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a bipolar secondary battery capable of preventing battery capacity deterioration when the bipolar secondary battery is deformed due to external force. The bipolar secondary battery is provided with an electricity generating element (7), two electricity collecting plates (9 and 10), and an insulating part (8), wherein the electricity generating element (7) is formed by serially-connecting and stacking a plurality of bipolar electrodes (5) across electrolyte layers (4); each bipolar electrode (5) is formed in a manner that a positive electrode active substance layer (2) is formed on one surface of an electricity collecting body (1) and a negative electrode active substance layer (3) is formed on the other surface of the electricity collecting body (1); the electricity collecting plates (9 and 10) are arranged at the two ends of the electricity generating element (7) in the stacking direction and isolated by the electricity generating element (7); and the insulating part (8) is formed by stacking insulating parts (8a to 8e) on the peripheral parts of the parts arranged on the electricity collecting bodies, where the positive electrode active substance layers (2) and the negative electrode active substance layers (3) are formed; and the insulating part is arranged on the outer sides of the peripheries of the electricity collecting plates and provided with a part larger than or equal to the thickness of the distance between the two electricity collecting plates.
Description
Technical field
The utility model relates to and a kind ofly disposes anodal and negative pole and the seal construction of the ambipolar secondary cell that forms in the mode from the sandwich collector body.
Background technology
As the secondary cell that in the motor driven of electric automobile or hybrid vehicle etc., uses, known ambipolar secondary cell, it is in series stacked and form the generating key element with the multi-disc bipolar electrode, wherein, this bipolar electrode forms anodal on a face of collector body, forms negative pole on another face.
For example, in patent documentation 1, the ambipolar secondary cell at the stacked direction two ends of generating key element configuration both positive and negative polarity collector plate is disclosed.
Patent documentation 1: TOHKEMY 2009-016235 communique
The utility model content
But, in the ambipolar secondary cell of patent documentation 1, apply from the outside under the situation of power, especially under the situation of the directive effect external force that intersects from stacked direction, may make the distortion of generating key element and collector plate contacts with each other with bipolar electrode.If collector plate contacts with each other, then flow through big electric current, generate heat together therewith, therefore cause battery capacity to worsen.
Therefore, the purpose of this utility model is, prevents to worsen to the battery capacity that ambipolar secondary cell applies under the situation of external force.
Ambipolar secondary cell of the present utility model has: the generating key element, and it is to form the bipolar electrode of positive electrode active material layer and negative electrode active material layer respectively on two faces of collector body, to form across the in series stacked multi-disc of dielectric substrate; And 2 collector plates, its stacked direction both ends in the generating key element dispose across the generating key element.And, having insulation division, its insulating element of peripheral part that will be configured in the part that is formed with positive pole or negative pole of collector body is laminated.In addition, insulation division is in the outside of the neighboring of collector plate, has the position that becomes more than or equal to the thickness at the interval of 2 collector plates.
The effect of utility model
According to the utility model, even ambipolar secondary cell is out of shape in the approximating mode of collector plate because of external force, also by the inside of insulation division to the battery key element is pressed into, and the interval between the collector plate is broadened, increase the contact resistance of generating key element and collector plate.Therefore,, also can suppress the electric current that flows through this moment, can prevent the deterioration of battery capacity thus even collector plate contacts with each other.
Description of drawings
Fig. 1 is the summary section of unitary construction of schematically representing the bipolar cell of the 1st execution mode.
Fig. 2 is a summary section of schematically representing the structure of bipolar electrode.
Fig. 3 is a summary section of schematically representing the structure of monocell layer.
Fig. 4 is the figure that observes bipolar cell from stacked direction.
Fig. 5 is the summary section of unitary construction of schematically representing the bipolar cell of the 2nd execution mode.
Fig. 6 is the summary section of unitary construction of schematically representing the bipolar cell of the 3rd execution mode.
Embodiment
Below, based on accompanying drawing, execution mode of the present utility model is described.
(the 1st execution mode)
The structure of ambipolar secondary cell (being designated hereinafter simply as bipolar cell) at first, is described.
Fig. 1 is the summary section of unitary construction of schematically representing the bipolar cell of the 1st execution mode.Fig. 2 is the summary section of structure of schematically representing to constitute the bipolar electrode of bipolar cell.Fig. 3 is the summary section of structure of schematically representing to constitute the monocell layer of bipolar cell.Fig. 4 is the figure that observes bipolar cell from the stacked direction top.
As shown in Figure 1, bipolar cell is made of following part, that is: the key element (battery key element) 7 of generating electricity, and it is that multi-disc bipolar electrode 5 is formed across dielectric substrate 4 stacked in series; And sealing 8, the electrolytical leakage that it is used to prevent from dielectric substrate 4, be configured in battery key element 7 around.Sealing 8 is the parts that are made of a plurality of encapsulant 8a～8e shown in as described later.At the two ends of the stacked direction of battery key element 7, configuration is just reaching negative collector plate 9,10, and they are electrically connected respectively, draws the electric current that flows to the face direction.In addition, for the detailed content of bipolar electrode 5, dielectric substrate 4 and sealing 8, record and narrate in the back.
The area of collector plate 9,10 is littler than collector body 1 area, and as shown in Figure 4, under the situation of observing above stacked direction, the periphery that becomes collector plate 9,10 is used as the structure of sealing 8 encirclements of frame type film.
The structure of each structure member and the manufacture method of bipolar cell are described here.
[collector body]
The conductive polymer material that material with carbon element will be disperseed and obtain is shaped to thickness 100[μ m by extension] film like of degree.It is cut to suitable size (for example 140 * 90mm), and obtain collector body 1.
[positive pole]
Following material is mixed with requirement ratio, make anode sizing agent.
At first, will be by LiMn as positive active material
2O
4[85 quality %], as the acetylene black [5 quality %] of conductive adjuvant, adjust the material that the N-N-methyl-2-2-pyrrolidone N-(NMP) of solvent constitutes as the Kynoar (PVDF) [10 quality %] of adhesive and as slurry viscosity, mix with above-mentioned ratio, make anode sizing agent.
Above-mentioned anode sizing agent is coated on the single face of collector body 1, utilizes the vacuum baking oven to make its drying.Then, push so that thickness becomes 60[μ m], thus anode electrode formed.
In addition, in the prescribed limit (for example apart from periphery 10mm degree) of the outer circumferential side of collector body 1, do not apply anode sizing agent.Sealing 8 forms the frame type corresponding with the scope that does not apply this anode sizing agent.
[negative pole]
The ratio of following material with regulation mixed, make cathode size.
At first, will be by as the hard carbon [90 quality %] of negative electrode active material, as the PVDF[10 quality % of adhesive] and adjust the material that the NMP of solvent constitutes as slurry viscosity, mix with above-mentioned ratio, make cathode size.This cathode size is coated in and is coated with on the face of face opposition side of anode sizing agent of collector body 1, utilize the vacuum baking oven to carry out drying.Then, push so that thickness becomes 50[μ m], form negative electrode.For the coating scope of cathode size, identical with above-mentioned positive pole.
In addition, in the making of above-mentioned positive pole and negative pole, owing to NMP when the pole drying all volatilization remove, so be not the structural material of electrode, but in order to obtain suitable slurry viscosity an amount of add.In addition, above-mentioned ratio is represented the ratio after adjusting composition the solvent except slurry viscosity and converting.
By said method, finish bipolar electrode 5, this bipolar electrode 5 has positive pole on a face as the electroconductive polymer film of collector body 1, with the face of its opposition side on have negative pole.
[dielectric substrate]
By dipping electrolyte in the dividing plate (thickness 35 μ m) of PE system, thereby form dielectric substrate 4.Electrolyte is that the volume ratio at diethyl carbonate (DEC) and carbon ester ethene (EC) is that 1M is as electrolytical LiPF in dissolving in 1 to 1 the mixed solvent
6Obtain.
In addition, electrolyte injects in stacked operation described later.
[sealing]
Encapsulant 8a～8e is characterised in that rigidity is than battery key element 7 height.Specifically, forming Young's modulus is 0.1～120GPa.
In addition, the adhesive strength in the welding described later is stipulated by hot strength, for example is set at more than or equal to 0.2[N/mm].But, be not limited to this certainly.
[laminating method]
Above-mentioned bipolar electrode 5 and dielectric substrate 4 is alternately stacked, apply heat and pressure from 3 limits of stacked direction two side direction encapsulant 8a～8e, make encapsulant 8a～8e and collector body 1 welding.The condition that is used for welding is to apply for 5 seconds under the pressure of 140 ℃ temperature and 0.2Mpa.Do not have 1 limit of welding, become the injection portion that is used to inject electrolyte.
After above-mentioned welding, inject electrolyte, utilize the collector plate 9,10 (130 * 80mm, thickness 100 μ m) that forms by aluminium sheet,, utilize the aluminium lamination compressing tablet to carry out vacuum seal in the mode that they are covered from stacked direction two ends clamping battery key element 7 from injection portion.Thus, finish the bipolar cell that contacts that utilizes atmospheric pressure to improve battery key element 7 and collector plate 9,10.
In addition, as the bonding agent that battery key element 7 and collector plate 9,10 is bonding, for example can enumerate rubber-like, silicon class, olefines, propylene class etc., but be not limited to these certainly.
In addition, the bonding force between battery key element 7 and the collector plate 9,10 is made as than a little less than the bonding force between the bonding force between the adjacent bipolar electrode 5 and the adjacent encapsulant 8a～8e.
Return the explanation of Fig. 1.
As noted above, the area of collector plate 9,10 is littler than sealing 8, in Fig. 1, becomes the state that sealing 8 stretches out to the left and right directions of collector plate 9,10.
If apply external force to bipolar cell from the direction that intersects with stacked direction (among Fig. 1 for laterally), the part (input part) that then is applied in external force is pressed into by the interior side direction to battery key element 7, the side of the input part side of bipolar cell, becoming with the input part is summit and the shape protruded to the center position of battery key element 7.That is, so that the approximating mode of part of the input part side of collector plate 9 and collector plate 10, make ambipolar bulk deformation.
Under the more situation of this distortion, if sealing 8 is the area equal with collector plate 9,10, perhaps the area of encapsulant 8a～8e then may make the end of the input part side of collector plate 9 and collector plate 10 contact with each other than collector plate 9,10 little (for example Fig. 3 of TOHKEMY 2009-16235 communique).If collector plate 9 contacts with collector plate 10, then can generate heat because of flowing through big electric current, promote the deterioration of battery capacity.
But according to the structure of Fig. 1, if be out of shape with collector plate 9 and collector plate 10 approximating modes, then the end of the input part side of collector plate 9 and collector plate 10 is absorbed in respectively among adjacent the encapsulant 8a and encapsulant 8e.Thus, the end of the input part side of collector plate 9 and collector plate 10 is difficult to contact.In addition,, also the interval of collector plate 9,10 is broadened, increase the contact resistance of battery key element 7 and collector plate 9,10 by encapsulant 8a～8e is pressed into to the inside of battery key element even come in contact, therefore, the electric current that flows through in the time of can suppressing to contact.
In addition, carry out chamfer machining, thereby further make collector plate 9,10 be difficult to run through sealing 8 by periphery each several part to collector plate 9,10.
In addition, as noted above, because the rigidity of encapsulant 8a～8e is than the rigidity height of battery key element 7, so the deflection of the bipolar cell integral body can inhibitory action external force the time.Its result can prevent contacting of collector plate 9 and collector plate 10.
In addition, because the bonding force between battery key element 7 and the collector plate 9,10, than between the stacked bipolar electrode 5 and a little less than the bonding force between encapsulant 8a～8e, so when deforming at external force action, at first collector plate 9,10 is peeled off from battery key element 7, can not flow through electric current.Thus, can prevent because the heating that the bonding situation about peeling off between the bipolar electrode 5 etc. cause.
Capacity sustainment rate and resistance change rate after above-mentioned effect also can be implemented by vibration test embody.Vibration test is to apply the input acceleration of regulation and the vibration of frequency all the time, make the test of bipolar cell vibration, capacity sustainment rate and resistance change rate after the vibration test as 100%, are represented with resistance change rate the capacity before the vibration as 1.
The result of test is, in the structure of present embodiment, the capacity sustainment rate after the vibration test is about 70%, and resistance change rate is about 0.9.
In addition, object at the mode that sealing 8 does not stretch out from the neighboring of collector plate 9,10, carries out identical test as a comparison, and the capacity sustainment rate is about 50%, and resistance change rate is about 0.7.
In addition, in the present embodiment, the encapsulant 8a～8e that is arranged on the collector body 1 plays the sealing function, also as preventing that the insulation division that contacts of collector plate 9 and collector plate 10 from working except constituting sealing 8 with stacked state.But encapsulant 8a～8e also can only play sealing function, and the insulation division of insulating effect has been set outside it in addition.
According to above content, in the present embodiment, can obtain following effect.
(1) because sealing 8 has the position more than or equal to the thickness at the interval of collector plate 9,10 in the outside of the neighboring of collector plate 9,10, even so at external force action so that under the situation that collector plate 9,10 approaching modes are out of shape, can prevent that also collector plate 9 from contacting with collector plate 10.In addition,, by encapsulant 8a～8e is pressed into to the inside of battery key element, thereby the interval of collector plate 9,10 is broadened, increase the contact resistance of battery key element 7 and collector plate 9,10, so can suppress the electric current that flows through this moment even owing to come in contact.Therefore, can prevent the deterioration of battery capacity.
(2) because the sealing 8 that encapsulant 8a～8e is laminated also works as the insulation division that prevents collector plate 9,10 contacts,, can reduce cost and make man-hour so except encapsulant 8a～8e, do not need to be provided with insulation division.
(the 2nd execution mode)
Fig. 5 is the summary section of unitary construction of schematically representing the bipolar cell of the 2nd execution mode.
Compare with the 1st execution mode, the structure of bipolar electrode 5, dielectric substrate 4, laminating method etc. are identical, but the structure difference of the area of collector plate 9,10 and sealing 8.
In the present embodiment, the area of collector plate 9,10 is identical with dielectric substrate 4, positive pole 2 and negative pole 3.For sealing 8, sealing 8a, the 8e at stacked direction both ends are thicker along the degree that stacked direction protrudes with the stacked direction end from collector plate 9,10.That is, sealing 8 is compared on stacked direction thicker with battery key element 7.
In structure shown in Figure 5, with the explanation of the 1st execution mode in the same manner, if by applying external force from the direction that intersects with stacked direction, bipolar cell integral body is out of shape with collector plate 9 and collector plate 10 approaching modes, then accompany therewith, sealing 8 also is that center curvature is out of shape with the input part.Therefore, between collector plate 9 and collector plate 10, there are encapsulant 8a, 8e reliably.That is, with the 1st execution mode in the same manner, can prevent that collector plate 9 from contacting with collector plate 10.
Battery capacity sustainment rate and resistance change rate after the vibration test are respectively about 80%, about 1.0.
According to above content, in the present embodiment, can obtain the effect identical with the 1st execution mode.
(the 3rd execution mode)
Fig. 6 is the summary section of unitary construction of schematically representing the bipolar cell of the 3rd execution mode.
Compare with the 1st execution mode, the structure of bipolar electrode 5, dielectric substrate 4, laminating method etc. are identical, but the structure difference of sealing 8.
In the present embodiment, encapsulant 8a, 8e become " wedge shape " along with the thickness of stacked direction increases gradually away from battery key element 7.Therefore, if the external force of the direction that effect is pressed into sealing 8 to the internal direction of battery key element 7, then sealing 8 is so that the mode that the interval of collector plate 9 and collector plate 10 broadens is pressed into, and collector plate 9 and collector plate 10 are peeled off from battery key element 7.
Its result not only can prevent because of collector plate 9 contacts the heating that causes with collector plate 10, and makes and collector plate 9,10 and battery key element 7 and sealing 8 electrical separation can prevent current concentration and heating.
Battery capacity sustainment rate and resistance change rate after the vibration test are respectively about 90%, are about 1.0.
According to above content, in the present embodiment, except the effect identical, can also obtain following effect with the 1st execution mode.
Because sealing 8 becomes so-called wedge shape, that is, get over neighboring away from collector plate 9,10, thickness increases more, if so external force action, then wedge-like portion enters between battery key element 7 and the collector plate 9,10 easily, be easy to collector plate 9,10 is peeled off from battery key element 7.Can prevent current concentration and heating thus.
In addition, the utility model is not limited to above-mentioned execution mode, certainly in the scope of the technological thought that claims are put down in writing, carries out various changes.
Claims (3)
1. ambipolar secondary cell is characterized in that having:
The generating key element, it is that bipolar electrode is formed across the in series stacked multi-disc of dielectric substrate, wherein, this bipolar electrode is to form positive electrode active material layer on a face of collector body, forms negative electrode active material layer and form on another face;
2 collector plates, its stacked direction both ends in described generating key element dispose across described generating key element; And
Insulation division, it is that insulating element is laminated, this insulating element is configured in the peripheral part of the part of described positive electrode active material layer of being formed with of described collector body or described negative electrode active material layer,
Described insulation division is in the outside of the neighboring of described collector plate, has the position that becomes more than or equal to the thickness at the interval of described 2 collector plates.
2. ambipolar secondary cell according to claim 1, wherein,
The thickness of described insulation division is to increase more away from the neighboring of described collector plate more.
3. ambipolar secondary cell according to claim 1 and 2, wherein,
Described insulating element be surround adjacent monocell layer around and be configured in seal member between the described collector body, wherein, this monocell layer comprises described positive active material, described dielectric substrate and described negative electrode active material and constitutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010057958A JP2011192540A (en) | 2010-03-15 | 2010-03-15 | Bipolar secondary battery |
| JP2010-057958 | 2010-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201994381U true CN201994381U (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200678628U Expired - Fee Related CN201994381U (en) | 2010-03-15 | 2011-03-15 | Bipolar secondary battery |
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| Country | Link |
|---|---|
| JP (1) | JP2011192540A (en) |
| CN (1) | CN201994381U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560241A (en) * | 2017-09-25 | 2019-04-02 | 松下知识产权经营株式会社 | Battery |
| CN110690368A (en) * | 2018-07-05 | 2020-01-14 | 株式会社日立制作所 | Battery cell, secondary battery, method for manufacturing battery cell, and method for manufacturing secondary battery |
| CN112670548A (en) * | 2020-06-12 | 2021-04-16 | 中国科学院物理研究所 | Bipolar battery, manufacturing method and application thereof |
| CN113228365A (en) * | 2018-12-25 | 2021-08-06 | 丰田自动车株式会社 | Bipolar battery and electricity storage device |
| CN113302767A (en) * | 2019-03-27 | 2021-08-24 | 松下知识产权经营株式会社 | Battery current collector, battery, method for producing battery current collector, and method for producing battery |
| CN113497274A (en) * | 2020-03-18 | 2021-10-12 | 本田技研工业株式会社 | Secondary battery using bipolar electrode |
| CN113497275A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Secondary battery using bipolar electrode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101381842B1 (en) * | 2012-11-09 | 2014-04-04 | 주식회사 비츠로셀 | Cell of reserve battery for enhancing insulation function |
| JP6715163B2 (en) * | 2016-10-27 | 2020-07-01 | 株式会社豊田自動織機 | Power storage device |
| JP7488984B2 (en) * | 2020-11-11 | 2024-05-23 | 株式会社豊田自動織機 | Energy Storage Module |
-
2010
- 2010-03-15 JP JP2010057958A patent/JP2011192540A/en active Pending
-
2011
- 2011-03-15 CN CN2011200678628U patent/CN201994381U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560241A (en) * | 2017-09-25 | 2019-04-02 | 松下知识产权经营株式会社 | Battery |
| CN110690368A (en) * | 2018-07-05 | 2020-01-14 | 株式会社日立制作所 | Battery cell, secondary battery, method for manufacturing battery cell, and method for manufacturing secondary battery |
| CN110690368B (en) * | 2018-07-05 | 2022-05-03 | 株式会社日立制作所 | Battery cell, secondary battery, method for manufacturing battery cell, and method for manufacturing secondary battery |
| CN113228365A (en) * | 2018-12-25 | 2021-08-06 | 丰田自动车株式会社 | Bipolar battery and electricity storage device |
| CN113228365B (en) * | 2018-12-25 | 2024-06-11 | 丰田自动车株式会社 | Bipolar battery and power storage device |
| CN113302767A (en) * | 2019-03-27 | 2021-08-24 | 松下知识产权经营株式会社 | Battery current collector, battery, method for producing battery current collector, and method for producing battery |
| CN113497274A (en) * | 2020-03-18 | 2021-10-12 | 本田技研工业株式会社 | Secondary battery using bipolar electrode |
| CN113497275A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Secondary battery using bipolar electrode |
| CN112670548A (en) * | 2020-06-12 | 2021-04-16 | 中国科学院物理研究所 | Bipolar battery, manufacturing method and application thereof |
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| Publication number | Publication date |
|---|---|
| JP2011192540A (en) | 2011-09-29 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20150315 |
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| EXPY | Termination of patent right or utility model |