CN201122626Y - Pole piece of stack type battery and pole core and battery including the same - Google Patents
Pole piece of stack type battery and pole core and battery including the same Download PDFInfo
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- CN201122626Y CN201122626Y CNU2007201944542U CN200720194454U CN201122626Y CN 201122626 Y CN201122626 Y CN 201122626Y CN U2007201944542 U CNU2007201944542 U CN U2007201944542U CN 200720194454 U CN200720194454 U CN 200720194454U CN 201122626 Y CN201122626 Y CN 201122626Y
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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 relates to a pole piece of a stacked type battery, and a pole core and a battery which comprise the pole piece. The pole piece of the battery comprises a square matrix with the surface coated with active material, and at least two tabs which extend out from the matrix and cannot be coated with active material, wherein at least two tabs are respectively arranged at two nonadjacent sides of the square matrix with the surface coated with active material and positioned at identical end or at different ends of two nonadjacent sides. The pole core of the battery comprises a plurality of positive plates, a diaphragm and a negative plate which are stacked and distributed in sequence in a flake-shaped way, and the positive plates and the negative plate adopt the structure of the pole piece provided by the utility model. The battery of the utility model comprises a pole core and electrolyte which are sealed in the battery casing body together, wherein the pole core adopts the pole core of the battery provided by the utility model. The stacked type battery of the utility model improves the large current discharge performance and the high rate circulation service life of the battery.
Description
Technical field
The utility model relates to field of batteries, relates in particular to a kind of pole piece of stacked battery and comprises the pole piece and the battery of this pole piece.
Background technology
The rate charge-discharge performance of stacked battery is not only relevant with the coated active material of the positive and negative plate of Battery Pole Core, but also it is relevant with the positive and negative plate design of Battery Pole Core, wherein for the design of the lug of positive and negative plate, also be directly influence battery the rate charge-discharge characteristic can key.
As depicted in figs. 1 and 2, at present, the Battery Pole Core 1 of the conventional stacked battery that uses is formed by stack gradually the positive plate 3, the negative plate 4 that are arranged in barrier film 2 two sides with sheet form, described positive plate 3, negative plate 4 comprise anodal matrix, negative pole matrix respectively and are coated in the active material of anodal matrix surface, negative pole matrix surface, and constitute the lug 5 of collector as projected current by the venturi portion that matrix extends out.Though adopt the stacked battery of this Battery Pole Core 1 structure can reach the effect of output current, but aspect further raising battery performance, especially heavy-current discharge aspect, also exist following defective: at first, when battery when high-multiplying power discharge (more than the 10C), electric current can not in time be transferred to the outside and have influence on the high-rate discharge ability of battery; Secondly, when battery in the large current density electric process or under the extreme service condition, the heat that produces on the pole piece can accumulate in the lug end rapidly, cause heat not spread timely and effectively, thereby have influence on the heavy-current discharge performance and the security performance of battery, the big multiplying power that has shortened battery recycles the life-span.
In order to address the above problem, the battery production producer that has adopted just/the pole piece version of a plurality of lugs is set on same one side of negative plate, though this pole piece version has enlarged the contact-making surface between lug and pole piece, and help the heat that diffusion aggregation produces at the pole piece of lug end, but this pole piece frame mode is to disperseing the flow direction of electric current in the pole piece dressing district, the big multiplying power that shortens the current lead-through path and improve battery high-multiplying power discharge efficient and improve battery recycles the life-span aspect and still has deficiency, and therefore improving the battery high-rate charge-discharge capability is the key issue that the research staff presses for solution.
The utility model content
The purpose of this utility model is to overcome the Battery Pole Core of existing stacked battery when high-multiplying power discharge (more than the 10C), electric current can not in time be transferred to the outside, and battery is in the large current density electric process or under the extreme service condition, the heat that produces on the pole piece can accumulate in the lug end rapidly, thereby cause heat can not spread the shortcoming of the high-rate discharge ability that has influence on battery timely and effectively, providing a kind of makes electric current can in time be transferred to the outside when high-multiplying power discharge (more than the 10C), and battery is in the large current density electric process or under the extreme service condition, can will accumulate in the heat of lug end spread timely and effectively, can not have influence on a kind of pole piece of stacked battery of the high-rate discharge ability of battery; Another purpose of the present utility model provides pole piece and the battery that comprises this pole piece.
The pole piece of stacked battery of the present utility model comprises that surface applied has the square matrix of active material and at least two lugs of active material are arranged by the uncoated that matrix extends out, wherein, described at least two lugs are separately positioned on surface applied has on non-conterminous two limits of square matrix of active material and is positioned at the same end on non-conterminous two limits or the difference end on non-conterminous two limits.
The pole piece of stacked battery of the present utility model comprises with sheet form and stacks gradually a plurality of positive plates, barrier film and the negative plate of arranging, and each described positive plate comprises that surface applied has the anodal matrix of positive electrode active materials and the positive pole ear of positive electrode active materials is arranged by the uncoated that anodal matrix extends out; Each described negative plate comprises that surface applied has the negative pole matrix of negative active core-shell material and the negative lug of negative active core-shell material is arranged by the uncoated that the negative pole matrix extends out; Wherein, the version of the pole piece that the structure of the pole piece of each described positive plate and each described negative plate provides for the utility model, and overlap each other between the positive pole ear on equidirectional one side of positive plate, also overlap each other between the negative lug on equidirectional one side of negative plate.
Stacked battery of the present utility model comprises pole piece and the electrolyte that is sealed in jointly in the battery container, wherein, the pole piece of the stacked battery that described pole piece provides for the utility model, the positive pole ear that each group of this pole piece overlaps is connected with a corresponding positive electrical respectively, the negative lug that each group of pole piece overlaps is connected with a corresponding negative electricity respectively, each described positive pole and negative pole run through respectively battery container and and described battery container between be tightly connected.
Stacked battery of the present utility model has increased the output variable of electric current, has improved the big electric current of battery (more than the 10C) discharge performance, and the flow direction that simultaneously can also disperse electric current in the dressing district shortens the current lead-through path and improves battery high-multiplying power discharge efficient; When battery in the large current density electric process, the heat that produces on the pole piece can also be distributed in a plurality of lugs and effectively be spread, and the heavy-current discharge performance of battery and fail safe are increased, the big multiplying power of having improved battery recycles the life-span.
Description of drawings
Fig. 1 is the pole piece structural representation of stacked electrokinetic cell in the prior art;
Fig. 2 is the pole piece structural representation of stacked electrokinetic cell in the prior art;
Fig. 3 is a kind of version schematic diagram of the pole piece of stacked electrokinetic cell of the present utility model;
Fig. 4 is the another kind of version schematic diagram of the pole piece of stacked electrokinetic cell of the present utility model;
Fig. 5 is the pole piece structural representation that the another kind of version of the pole piece of stacked electrokinetic cell of the present utility model is made;
Fig. 6 is the of the present utility model stacked electrokinetic cell perspective view of being made by Fig. 5 pole piece;
Fig. 7 is the 10C discharge voltage profile figure of stacked electrokinetic cell in the prior art;
Fig. 8 is the 10C discharge voltage profile figure of the stacked electrokinetic cell of the present utility model of Fig. 6;
Fig. 9 is the charge and discharge cycles curve chart (1C charging/10C discharge) of stacked electrokinetic cell in the prior art;
Figure 10 is the charge and discharge cycles curve chart (1C charging/10C discharge) of the stacked electrokinetic cell of the present utility model of Fig. 6.
Embodiment
Below in conjunction with accompanying drawing execution mode of the present utility model is elaborated.
As shown in Figure 3 and Figure 4, the pole piece 6 of stacked battery of the present utility model comprises that surface applied has the square matrix 10 of active material and at least two lugs 5 of active material are arranged by the uncoated that matrix extends out, wherein, described at least two lugs 5 are separately positioned on surface applied has on non-conterminous two limits of square matrix 10 of active material and is positioned at the same end on non-conterminous two limits or the difference end on non-conterminous two limits.
The width of described lug 5 is the 15%-40% of the width of the described matrix 10 that is coated with active material, and the height of described lug 5 is the 10%-40% of the height of the described matrix (10) that is coated with active material.
As shown in Figure 5, the pole piece 1 of stacked battery of the present utility model comprises with sheet form and stacks gradually a plurality of positive plates 3 of arranging, barrier film 2 and negative plate 4, each described positive plate 3 comprises that surface applied has the anodal matrix 10z of positive electrode active materials and the positive pole ear 5z of positive electrode active materials is arranged by the uncoated that anodal matrix extends out, each described negative plate 4 comprises that surface applied has the negative pole matrix 10f of negative active core-shell material and the negative lug 5f of negative active core-shell material is arranged by the uncoated that the negative pole matrix extends out, wherein, the version of the pole piece that the structure of the pole piece of each described positive plate 3 and each described negative plate 4 provides for the utility model, and overlap each other between the positive pole ear 5z on equidirectional one side of positive plate 3, also overlap each other between the negative lug 5f on equidirectional one side of negative plate 4.
As shown in Figure 6, stacked battery of the present utility model comprises pole piece 1 and the electrolyte that is sealed in jointly in the battery container 7, wherein, the pole piece of the battery that described pole piece 1 provides for the utility model, the positive pole ear 5z that each group of this pole piece 1 overlaps is electrically connected with a corresponding positive pole 8 respectively, the negative lug 5f that each group of pole piece 1 overlaps is electrically connected with a corresponding negative pole 9 respectively, each described anodal 8 and negative pole 9 run through respectively battery container 7 and and described battery container 7 between be tightly connected.
The structure of the positive plate 3 described in the utility model, barrier film 2, negative plate 4 and electrolyte or composition and preparation method thereof etc. are conventionally known to one of skill in the art, and there is no particular limitation to it for the utility model, do not repeat them here.
The stacked battery of the utility model is owing to adopt multipole ear structure, and will be just/negative electrode lug just is being separately positioned on/and the surface applied of negative plate has non-conterminous two limits of the square matrix of active material, and be positioned at the version (as shown in Figure 4) of the difference end on the same end (as shown in Figure 3) on non-conterminous two limits or non-conterminous two limits, can increase current output like this, improve the high-rate battery discharge performance, and the current direction in dispersion coating active material district, shorten the current lead-through path, thereby further improve battery high-multiplying power discharge efficient, the heat that produces in heavy-current discharge simultaneously also can be distributed in a plurality of lugs, improves battery safety and cycle life.
To be described further the utility model below in conjunction with embodiment.
[embodiment]
(1) preparation of positive plate
Positive active material LiCoO with 100 parts of weight
2The conductive agent acetylene black of 5 parts of weight, the binding agent PVDF of 3 parts of weight joins among the NMP of 60 parts of weight and is uniformly mixed into paste, then it is coated in equably thickness and is on 0.02 millimeter the aluminium foil, again the anode sizing agent on two positive pole ear surfaces of aluminium foil extension is scraped off after applying evenly, drying, compressing tablet, cut, obtaining length is 114 millimeters, width is 94 millimeters, thick is 0.125 millimeter positive plate, positive plate after cutting is wrapped in doubling along its length and the barrier film of periphery with the welding of high frequency bonding machine, two anode ears expose outside barrier film, make anodal assembly, as shown in Figure 5.What barrier film adopted is polypropylene screen.
(2) preparation of negative plate
Negative electrode active material Delanium with 95 parts of weight, the binding agent PVDF of 5 parts of weight joins among the NMP of 60 parts of weight and is uniformly mixed into paste, then it is coated in equably thickness and is on 0.012 millimeter the Copper Foil, again the cathode size on two negative lug surfaces of Copper Foil extension is scraped off after applying evenly, drying, compressing tablet, cut, obtaining length is 120 millimeters, width is 100 millimeters, thick is 0.120 millimeter negative plate, negative plate after cutting is wrapped in doubling along its length and the barrier film of periphery with the welding of high frequency bonding machine, two negative electrode lugs expose outside barrier film, make the negative pole assembly, as shown in Figure 5.What barrier film adopted is polypropylene screen.
(3) preparation of Battery Pole Core
The anodal assembly that (1) and (2) is prepared, negative pole assembly stack gradually according to the order of negative pole assembly/anodal assembly/negative pole assembly and obtain stacked battery pole piece, as shown in Figure 5.
(4) assembling of battery
With LiPF
6Be configured to LiPF with EC and DMC
6Concentration is the solution (volume ratio of EC/DMC is 1: 1) of 1 mol, obtains electrolyte, and the consumption of electrolyte is 220 grams/only.The Battery Pole Core that (3) are obtained is inserted in the battery container of 50X110X140 millimeter, and positive and negative lug is welded on respectively on the positive pole and negative pole of cover plate inside, injects above-mentioned electrolyte, seal by battery cover board, make Laminated Type Lithium Ion Secondary Battery, i.e. present embodiment battery, as shown in Figure 6.
[Comparative Examples]
What this Comparative Examples illustrated is the pole piece and the lithium ion battery of prior art.
Method according to embodiment prepares pole piece and lithium ion battery, and different just has only a positive and negative lug on the positive and negative plate, the same embodiment of all the other manufacture methods, as depicted in figs. 1 and 2.
Below [embodiment] discharged and recharged mensuration with the battery that [Comparative Examples] prepares, method for measuring is as follows:
At ambient temperature, with [embodiment] and [Comparative Examples] battery respectively with the 1C current charges to 4.2V, after voltage rises to 4.2V with constant-potential charge, cut-off current is 0.05C, after shelving 5 minutes, battery is with the 10C current discharge, and its 10C discharge performance is shown in Fig. 7 [Comparative Examples] and Fig. 8 [embodiment].Repeat above-mentioned steps then, battery is charged with 1C, the pattern of 10C discharge is carried out 250 circulations, and its cycle performance is shown in Fig. 9 [Comparative Examples] and Figure 10 [embodiment].
The voltage curve of comparison diagram 7 and Fig. 8 as can be seen, the voltage curve among Fig. 8 is more smooth and more stable than the voltage curve among Fig. 7, this just explanation adopt heavy-current discharge performance of the utility model battery obviously to be better than the prior art battery; The discharge cycles curve chart of comparison diagram 9 and Figure 10 as can be seen, the capability retention of prior art battery after 250 circulations is 80%, and the capability retention of the utility model battery after 250 circulations can reach more than 92%, and its has illustrated that originally the cycle performance of the utility model battery obviously is better than the cycle performance of prior art battery.
Stacked battery of the present utility model has increased current output, has improved the high-rate battery discharge performance, has shortened the current lead-through path, thereby has further improved battery high-multiplying power discharge efficient, and has improved battery safety and cycle life.The number of laminations of this battery can require to increase and decrease according to difference, so that the lithium ion battery of different capabilities to be provided, is electric tool, and the equipment of the high-power outputs of needs such as electric automobile provides power.
Claims (4)
1, a kind of pole piece of stacked battery (6), this pole piece (6) comprises that surface applied has the square matrix (10) of active material and at least two lugs (5) of active material are arranged by the uncoated that matrix extends out, it is characterized in that described at least two lugs (5) are separately positioned on surface applied to be had on non-conterminous two limits of square matrix (10) of active material and be positioned at the same end on non-conterminous two limits or the difference end on non-conterminous two limits.
2, pole piece according to claim 1, it is characterized in that, the width of described lug (5) is the 15%-40% of the width of the described matrix (10) that is coated with active material, and the height of described lug (5) is the 10%-40% of the height of the described matrix (10) that is coated with active material.
3, a kind of pole piece of stacked battery (1), this pole piece (1) comprises with sheet form and stacks gradually a plurality of positive plates (3), barrier film (2) and the negative plate (4) of arranging, and each described positive plate (3) comprises that surface applied has the anodal matrix (10z) of positive electrode active materials and the positive pole ear (5z) of positive electrode active materials is arranged by the uncoated that anodal matrix extends out; Each described negative plate (4) comprises that surface applied has the negative pole matrix (10f) of negative active core-shell material and the negative lug (5f) of negative active core-shell material is arranged by the uncoated that the negative pole matrix extends out; It is characterized in that, the structure of the pole piece of each described positive plate (3) and each described negative plate (4) is the structure of any described pole piece in the claim 1 to 2, and overlap each other between the positive pole ear (5z) on equidirectional one side of positive plate (3), also overlap each other between the negative lug (5f) on equidirectional one side of negative plate (4).
4, a kind of stacked battery, this battery comprises pole piece (1) and the electrolyte that is sealed in jointly in the battery container (7), it is characterized in that, described pole piece (1) is the pole piece of claim 3 described batteries, the positive pole ear (5z) that each group of this pole piece (1) overlaps is electrically connected with a corresponding positive pole (8) respectively, the negative lug (5f) that each group of pole piece (1) overlaps is electrically connected with a corresponding negative pole (9) respectively, each described positive pole (8) and negative pole (9) run through respectively battery container (7) and and described battery container (7) between be tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201944542U CN201122626Y (en) | 2007-12-07 | 2007-12-07 | Pole piece of stack type battery and pole core and battery including the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201944542U CN201122626Y (en) | 2007-12-07 | 2007-12-07 | Pole piece of stack type battery and pole core and battery including the same |
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| Publication Number | Publication Date |
|---|---|
| CN201122626Y true CN201122626Y (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201944542U Expired - Lifetime CN201122626Y (en) | 2007-12-07 | 2007-12-07 | Pole piece of stack type battery and pole core and battery including the same |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157751A (en) * | 2011-03-15 | 2011-08-17 | 余建岳 | Bidirectional current-collecting lithium ion battery |
| CN102163743A (en) * | 2011-03-15 | 2011-08-24 | 余建岳 | Vacuum explosion-proof lithium-ion battery |
| CN102231433A (en) * | 2011-05-25 | 2011-11-02 | 万向电动汽车有限公司 | Lithium ion battery |
| CN102263304A (en) * | 2011-07-01 | 2011-11-30 | 山东上存能源股份有限公司 | Lithium-ion power battery and battery management system |
| CN102332553A (en) * | 2011-10-14 | 2012-01-25 | 深圳市格瑞普电池有限公司 | Pole piece for laminated lithium ion battery and laminated lithium ion battery |
| CN102420309A (en) * | 2011-11-14 | 2012-04-18 | 奇瑞汽车股份有限公司 | Laminated power battery |
| CN102730441A (en) * | 2011-04-01 | 2012-10-17 | Ckd株式会社 | Electrode foil conveyer and laminated cell manufacturing device |
| CN102779968A (en) * | 2012-04-01 | 2012-11-14 | 深圳市民众能源科技有限公司 | Modular battery |
| CN105576299A (en) * | 2014-10-14 | 2016-05-11 | 神华集团有限责任公司 | Lead acid battery |
| US10135097B2 (en) | 2010-07-16 | 2018-11-20 | Apple Inc. | Construction of non-rectangular batteries |
| CN109638212A (en) * | 2018-11-20 | 2019-04-16 | 东莞锂威能源科技有限公司 | A kind of high magnification fast charge lithium ion battery |
| CN109841788A (en) * | 2017-11-27 | 2019-06-04 | 中国电子科技集团公司第十八研究所 | Laminated lithium primary battery cathode structure |
| CN111463367A (en) * | 2019-01-22 | 2020-07-28 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN112002868A (en) * | 2020-09-08 | 2020-11-27 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| US10868290B2 (en) | 2016-02-26 | 2020-12-15 | Apple Inc. | Lithium-metal batteries having improved dimensional stability and methods of manufacture |
| CN112117424A (en) * | 2019-06-21 | 2020-12-22 | 比亚迪股份有限公司 | Single battery, power battery pack and vehicle |
| WO2020252803A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Single cell battery, power battery pack and vehicle |
-
2007
- 2007-12-07 CN CNU2007201944542U patent/CN201122626Y/en not_active Expired - Lifetime
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10135097B2 (en) | 2010-07-16 | 2018-11-20 | Apple Inc. | Construction of non-rectangular batteries |
| US11024887B2 (en) | 2010-07-16 | 2021-06-01 | Apple Inc. | Construction of non-rectangular batteries |
| CN102163743A (en) * | 2011-03-15 | 2011-08-24 | 余建岳 | Vacuum explosion-proof lithium-ion battery |
| CN102157751A (en) * | 2011-03-15 | 2011-08-17 | 余建岳 | Bidirectional current-collecting lithium ion battery |
| CN102730441A (en) * | 2011-04-01 | 2012-10-17 | Ckd株式会社 | Electrode foil conveyer and laminated cell manufacturing device |
| CN102231433A (en) * | 2011-05-25 | 2011-11-02 | 万向电动汽车有限公司 | Lithium ion battery |
| CN102263304A (en) * | 2011-07-01 | 2011-11-30 | 山东上存能源股份有限公司 | Lithium-ion power battery and battery management system |
| CN102332553A (en) * | 2011-10-14 | 2012-01-25 | 深圳市格瑞普电池有限公司 | Pole piece for laminated lithium ion battery and laminated lithium ion battery |
| CN102420309A (en) * | 2011-11-14 | 2012-04-18 | 奇瑞汽车股份有限公司 | Laminated power battery |
| CN102779968B (en) * | 2012-04-01 | 2015-05-20 | 深圳市民众能源科技有限公司 | Modular battery |
| CN102779968A (en) * | 2012-04-01 | 2012-11-14 | 深圳市民众能源科技有限公司 | Modular battery |
| CN105576299A (en) * | 2014-10-14 | 2016-05-11 | 神华集团有限责任公司 | Lead acid battery |
| CN105576299B (en) * | 2014-10-14 | 2019-05-14 | 神华集团有限责任公司 | Lead-acid battery |
| US11784302B2 (en) | 2016-02-26 | 2023-10-10 | Apple Inc. | Lithium-metal batteries having improved dimensional stability and methods of manufacture |
| US10868290B2 (en) | 2016-02-26 | 2020-12-15 | Apple Inc. | Lithium-metal batteries having improved dimensional stability and methods of manufacture |
| CN109841788A (en) * | 2017-11-27 | 2019-06-04 | 中国电子科技集团公司第十八研究所 | Laminated lithium primary battery cathode structure |
| CN109638212A (en) * | 2018-11-20 | 2019-04-16 | 东莞锂威能源科技有限公司 | A kind of high magnification fast charge lithium ion battery |
| CN111463367A (en) * | 2019-01-22 | 2020-07-28 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| WO2020252803A1 (en) * | 2019-06-21 | 2020-12-24 | 比亚迪股份有限公司 | Single cell battery, power battery pack and vehicle |
| CN112117424A (en) * | 2019-06-21 | 2020-12-22 | 比亚迪股份有限公司 | Single battery, power battery pack and vehicle |
| CN112117424B (en) * | 2019-06-21 | 2022-02-08 | 比亚迪股份有限公司 | Single battery, power battery pack and vehicle |
| CN112002868A (en) * | 2020-09-08 | 2020-11-27 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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| C14 | Grant of patent or utility model | ||
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Assignee: Huizhou Biyadi Industry Co., Ltd Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.11.1 to 2016.3.31 Contract record no.: 2009440000400 Denomination of utility model: Pole piece of stack type battery and pole core and battery including the same Granted publication date: 20080924 License type: Exclusive license Record date: 20090525 |
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