CN111769334A - Coiling electric core, battery and battery module structure - Google Patents
Coiling electric core, battery and battery module structure Download PDFInfo
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- CN111769334A CN111769334A CN202010522862.6A CN202010522862A CN111769334A CN 111769334 A CN111769334 A CN 111769334A CN 202010522862 A CN202010522862 A CN 202010522862A CN 111769334 A CN111769334 A CN 111769334A
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- 238000004804 winding Methods 0.000 claims abstract description 83
- 230000004888 barrier function Effects 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052744 lithium Inorganic materials 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 7
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 238000005261 decarburization Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- 238000005262 decarbonization Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the technical field of battery production and manufacture, and particularly relates to a winding battery core which comprises a positive plate (1), a negative plate (2) and an isolating film (3) arranged between the positive plate (1) and the negative plate (2), wherein the positive plate (1), the isolating film (3) and the negative plate (2) are wound to form a winding core (4) with a hollow structure, the radian of the corner of the winding core (4) is alpha, and alpha is more than 0 degree and less than 180 degrees. The invention can solve the problem that the corner of the pole piece in the battery cell is subjected to excessive stress to cause powder falling and even lithium precipitation, and prolong the service life of the battery. In addition, the invention also discloses a battery and a battery module structure.
Description
Technical Field
The invention belongs to the technical field of battery production and manufacturing, and particularly relates to a winding battery core, a battery and a battery module structure.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. The module that the electric core is constituteed is usually used for the chassis of traditional fuel vehicle, arranges in specific positions such as engine, oil tank of ordinary fuel vehicle, reforms transform the fuel vehicle into electric automobile.
However, the inventor finds that the existing scheme has at least the following defects: the electrode after coiling can be flattened to current electric core winding structure when assembling into the shell, and 180 pole piece turnings can appear in the turning position, and the too big, the interface interval difference of stress that this kind of corner caused leads to electric core performance to descend, if after the pole piece extrudes for a long time, appears the pole piece and receives the stress effect fracture, makes the position of turning seriously analyse lithium etc. for electric core performance and security performance descend.
Disclosure of Invention
One of the objects of the present invention is: to prior art's not enough, provide a coiling electricity core, can improve the too big problem that leads to the corner to fall whitewashed or even analyse lithium of the corner of the inside pole piece of electricity core stress, the life of extension battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a coiling electricity core, includes positive plate, negative pole piece and sets up positive plate with the barrier film between the negative pole piece, positive plate the barrier film with the negative pole piece is convoluteed and is formed hollow structure's book core, the radian of rolling up the corner of core is alpha, and 0 is < alpha < 180.
As an improvement of the winding battery cell, the radian alpha at the corner is more than or equal to 90 degrees and less than or equal to 120 degrees.
As an improvement of the winding battery cell, the number of corners of the winding core is 4-8.
As an improvement of the winding core of the present invention, the number of corners of the winding core is 4, and the radian α of each corner is 90 °.
As an improvement of the winding core of the present invention, the arc edge at the corner of the winding core is an arc or an elliptical arc.
As an improvement of the winding electric core, the cross-sectional shape of the hollow structure is a polygon or an ellipse.
As an improvement of the winding battery core, a smooth transition is formed between the pole piece in the transverse direction of the winding core and the pole piece in the longitudinal direction of the winding core.
The invention also provides a battery, which comprises the winding battery cell and a shell matched with the winding battery cell, wherein the winding battery cell is accommodated in the shell.
The invention also provides a battery module structure, which comprises the battery and an assembled battery matched with the battery, wherein the assembled battery is accommodated in the hollow structure, and the assembled battery is electrically connected with the battery.
As an improvement of the battery module structure of the present invention, the top of the battery is provided with contact terminals, the contact terminals are oppositely disposed on two sides of the battery, and the top of the assembled battery is provided with a pole connected with the contact terminals.
The invention has the beneficial effects that the invention comprises a positive plate, a negative plate and an isolating film arranged between the positive plate and the negative plate, the positive plate, the isolating film and the negative plate are wound to form a winding core with a hollow structure, the radian at the corner of the winding core is alpha, and alpha is more than 0 degree and less than 180 degrees. Because the electrode after winding is flattened by the existing electric core winding structure when the electric core is assembled into a shell, a 180-degree pole piece corner can be formed at the corner position, the performance of the electric core is reduced due to overlarge stress and interface distance difference caused by the corner position, for example, after the pole piece is extruded for a long time, the pole piece is cracked under the stress action, the lithium is seriously separated at the corner position, and the service performance and the safety performance of the electric core are also reduced, therefore, the positive pole piece, the isolating membrane and the negative pole piece are wound to form a winding core with a hollow structure, the curvature radius of the positive pole piece, the isolating membrane and the negative pole piece during winding is increased, the condition that 180-degree can be formed at the corner position of the winding core is avoided, the 180-degree bending of the pole piece is avoided, the phenomena of decarburization powder falling or copper leakage caused by over-bending and extrusion at the corner of the pole piece are improved, the lithium separation at, the cycle life is prolonged, and the safety performance is also improved. The invention can solve the problem that the corner of the pole piece in the battery cell is subjected to excessive stress to cause powder falling and even lithium precipitation, and prolong the service life of the battery.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 4 is a schematic diagram of parallel connection according to a seventh embodiment of the present invention.
Fig. 5 is a schematic diagram of the connection in series according to the seventh embodiment of the present invention.
Fig. 6 is a schematic structural view of a battery according to an eighth embodiment of the present invention.
Fig. 7 is a schematic structural view of a battery module structure according to an eighth embodiment of the present invention.
Wherein: 1-positive plate; 2-negative pole piece; 3-an isolating membrane; 4-a winding core; 5-a shell; 6-a combined battery; 61-pole; 7-contact terminal.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to fig. 1 to 7, but the present invention is not limited thereto.
Implementation mode one
The utility model provides a coiling electricity core, including positive plate 1, negative pole piece 2 and the barrier film 3 of setting between positive plate 1 and negative pole piece 2, positive plate 1, barrier film 3 and the winding core 4 of negative pole piece 2 formation hollow structure of convoluteing, the radian of the corner of rolling up core 4 is alpha, 0 ^ 0 < 180, as shown in figure 1, the corner can understand, positive plate 1, barrier film 3 and negative pole piece 2 are around the in-process of rolling up the needle and coiling, roll up the angle that forms between the horizontal pole piece of core 4 and the longitudinal pole piece of core 4, roll up and be smooth transition between the horizontal pole piece of core 4 and the longitudinal pole piece of core 4. Because the electrode after winding can be flattened by the existing electric core winding structure when the electric core winding structure is assembled into a shell, 180-degree pole piece corners can be formed at the corner positions, the phenomenon of decarburization powder falling or copper leakage caused by excessive bending and extrusion at the corner positions can be caused by overlarge stress and interface space difference caused by the corner positions, even the performance of the electric core is reduced, if the pole piece is cracked under the stress action after being extruded for a long time, the lithium is seriously analyzed at the corner positions, and the electric core and the safety performance are also reduced, therefore, the positive pole piece 1, the isolation film 3 and the negative pole piece 2 are wound to form the winding core 4 with a hollow structure, the curvature radius of the positive pole piece 1, the isolation film 3 and the negative pole piece 2 during winding is increased, the condition of 180-degree at the corner positions of the winding core 4 can be avoided, the 180-degree bending of the pole piece can be avoided, the phenomenon of decarburization powder falling or copper leakage at the corner positions caused by, the lithium can be effectively prevented from being separated out from the corners in the circulating process, so that the circulating performance of the battery cell is improved, the circulating life of the battery cell is prolonged, and the safety performance of the battery cell is also improved; the radian range of the corner of the winding core 4 is limited, so that 180-degree corners of the pole piece are prevented, and the winding core 4 with a hollow structure can be formed by winding the positive pole piece 1, the isolation film 3 and the negative pole piece 2.
Preferably, the number of corners of the winding core 4 is 4, the radians α of the 4 corners are all 90 °, and the cross-sectional shape of the hollow structure is polygonal. In the embodiment, one end of the positive plate 1, the isolating film 3 and the negative plate 2 surrounds a preset center, and after four 90-degree corners, a polygonal hollow structure is formed at the center position, so that the curvature radius of the positive plate 1, the isolating film 3 and the negative plate 2 during winding is increased, and the condition that 180 degrees occurs at the corner position of the winding core 4 is avoided, but the invention is not limited thereto, and the angle and the number of the corners of the winding core 4 can be adjusted according to the surrounded hollow structure, so that the stress generated at the corners can be reduced; the quantity of injecing core 4 corner is the minimum, prevents the quantity undersize at corner for core 4 can't enclose into hollow structure.
Preferably, on the basis of individual layer positive plate 1, barrier film 3 and negative pole piece 2, still can superpose barrier film 3, positive plate 1, barrier film 3, negative pole piece 2 in proper order, so analogize, can superpose positive plate 1 or negative pole piece 2 in proper order, then convolute, form multilayer book core 4, in addition, the number of piles of positive plate 1, barrier film 3 and negative pole piece 2 can be adjusted according to the model and the size of actual battery, it can to satisfy to roll up the core 4 and normally buckle.
Preferably, the arc edge at the corner of the roll core 4 is an arc, and the corner of the roll core 4 is a circular edge. According to actual battery model and market demand, can be with the arc limit of the corner of rolling up core 4 for the circular arc, can also design into circular edges and corners with the corner of rolling up core 4 for corner smooth transition has improved the phenomenon that its corner falls whitewashed or leaks copper because of the decarbonization that excessively bending and extrusion lead to, can effectively prevent to circulate the corner of in-process and analyse lithium, consequently has not only improved the cyclicity ability of electric core.
The working principle of the invention is as follows:
because the electrode after winding is flattened by the existing electric core winding structure when the electric core winding structure is assembled into a shell, a 180-degree pole piece corner can be formed at the corner position, the performance of the electric core is reduced due to overlarge stress and interface distance difference caused by the corner position, if the pole piece cracks under the stress action after being extruded for a long time, the lithium is seriously separated at the corner position, and the service performance and the safety performance of the electric core are also reduced, therefore, the positive pole piece 1, the isolating membrane 3 and the negative pole piece 2 are wound to form the winding core 4 with a hollow structure, the curvature radius of the positive pole piece 1, the isolating membrane 3 and the negative pole piece 2 is increased when winding, the condition that the corner position of the winding core 4 can be 180 degrees is avoided, the 180-degree bending of the pole piece is avoided, the phenomena of decarburization powder falling or copper leakage caused by excessive bending and extrusion are improved, the lithium separation at the corner in the circulation process can, therefore, the cycle performance of the battery cell is improved, the cycle life of the battery cell is prolonged, and the safety performance of the battery cell is also improved.
Second embodiment
The difference from the first embodiment is that: the radian alpha of the corner of the embodiment is equal to or less than 90 degrees and equal to or less than 120 degrees, the arc edge of the corner of the roll core 4 is an elliptical arc, and the corner of the roll core 4 is a square edge angle. The number of corners of the winding core 4 is limited to be the maximum value, so that the phenomenon that the number of corners of the winding core 4 is too large, the production cost is increased, meanwhile, the corresponding shell 5 is difficult to match, and the production difficulty is increased; the range of the radian alpha of the corner of the winding core 4 is further limited, the curvature radius of the positive plate 1, the isolation film 3 and the negative plate 2 during winding is increased, and the condition that the corner position of the winding core 4 is 180 degrees is avoided, so that the pole piece is prevented from being bent by 180 degrees, the phenomenon of decarburization powder falling or copper leakage caused by excessive bending and extrusion at the corner of the pole piece is improved, meanwhile, the winding core 4 is favorably surrounded into a regular shape, and the winding core 4 is conveniently matched with the corresponding shell 5; according to actual battery model and market demand, can be with the arc limit design of the corner of rolling up core 4 for elliptical arc for corner smooth transition has improved the phenomenon that its corner falls whitewashed or leaks copper because of the decarbonization that excessively crooked and extrusion lead to, can effectively prevent to circulate the corner of in-process and analyse lithium, consequently has not only improved the cyclicity ability of electric core.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the number of corners of the winding core 4 in the present embodiment is 6, and the cross-sectional shape of the hollow structure is an ellipse. As shown in fig. 3, the number of corners of the winding core 4 is limited to be a middle value, so that the condition that the corner position of the winding core 4 is 180 degrees is avoided, the pole piece is prevented from being bent by 180 degrees, the difficulty of the production process of the winding core 4 is reduced, and the production cost of the battery is reduced; according to the shape of the combined battery 6, the hollow structure can be designed to be oval, the oval combined battery 6 or the battery pack can be conveniently accommodated in the hollow structure, the capacity of the battery can be improved, in addition, the inner structure of the automobile can be matched, and the flexibility and the energy density of the battery in an assembly space can be improved.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A battery comprises a winding battery cell and a shell 5 matched with the winding battery cell as in the first embodiment, wherein the winding battery cell is accommodated in the shell 5.
It should be noted that: the winding battery cell can be formed by the aid of a square winding needle, the wound battery cell is not separated from the square winding needle, cold pressing or hot pressing shaping treatment is directly carried out on the winding battery cell, after shaping, the battery cell is separated from the square winding needle and is placed into a matched shell 5, the shape of the shell 5 is matched with that of the winding battery cell, for example, the winding battery cell in the first embodiment is in a shape like a Chinese character 'kou', the shape of the shell 5 is correspondingly designed into a shape like a Chinese character 'kou', and application scenes of the small-size battery cells can be widened; meanwhile, the square-shaped large battery cell can be combined with a motor, an electric control system or other support structures on a vehicle for use, and flexible and changeable configuration space is met on the premise of ensuring energy density.
Fifth embodiment
A battery comprises a winding battery cell and a shell 5 matched with the winding battery cell in the second embodiment, wherein the winding battery cell is accommodated in the shell 5.
Sixth embodiment
A battery comprises a winding battery cell and a shell 5 matched with the winding battery cell as in the third embodiment, wherein the winding battery cell is accommodated in the shell 5.
Seventh embodiment
A battery module structure comprises a battery of the fourth embodiment and an assembled battery 6 matched with the battery, wherein the assembled battery 6 is accommodated in a hollow structure, and the assembled battery 6 is electrically connected with the battery.
Preferably, the top of the battery is provided with a contact terminal 7, and the top of the assembled battery 6 is provided with a pole 61 connected with the contact terminal 7.
It should be noted that, as shown in fig. 4 and fig. 5, the combined battery 6 and the battery may be connected in parallel or in series, the positive electrode post 61 of the combined battery cell 6 is connected to the negative electrode contact terminal 7 of the square battery cell, the positive electrode post 61 of the square battery is connected to the negative electrode post 61 of the combined battery cell 6, and the electrical connection includes, but is not limited to, buss laser welding, resistance welding, riveting, or nut connection; case of parallel connection: the positive and negative electrode posts 61 of the combined battery cell 6 are respectively connected with the positive and negative contact terminals 7 of the square battery cell, and the electric connection forms include but are not limited to Busbar laser welding, resistance welding, riveting, nut connection and the like; in addition, in order to be used in combination with a motor, an electric control system, or other support structures on a vehicle, etc., on the premise of ensuring energy density, flexible and changeable configuration space is satisfied, and the position of the combined battery cell 6 can also be replaced by any other part with a proper size on the electric vehicle.
Embodiment eight
A battery module structure comprises a battery of the fifth embodiment and an assembled battery 6 matched with the battery, wherein the assembled battery 6 is accommodated in a hollow structure, and the assembled battery 6 is electrically connected with the battery.
It should be noted that: as shown in fig. 6 and 7, the contact terminals 7 are oppositely arranged on two sides of the battery, so that the interference of tabs can be avoided, the flow area is increased, and the manufacturing yield is improved; the contact terminal 7 is designed into a long strip shape, the overcurrent capacity is improved, an exposed metal surface is arranged on the inner side of the top cover, a flexible connection structure is welded on the inner side of the top cover by laser, the flexible connection structure is connected with a lug of a winding battery cell by ultrasonic welding, the contact terminal 7 is electrically connected with the lug of the winding battery cell, and the length of the contact terminal 7 is 20-200 mm; the width is 15-30 mm; the thickness is 1.5-3 mm.
Ninth embodiment
A battery module structure comprises a battery of the sixth embodiment and an assembled battery 6 matched with the battery, wherein the assembled battery 6 is accommodated in a hollow structure, and the assembled battery 6 is electrically connected with the battery.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A winding electric core is characterized in that: including positive plate (1), negative pole piece (2) and setting up positive plate (1) with barrier film (3) between negative pole piece (2), positive plate (1) barrier film (3) with negative pole piece (2) are convoluteed and are formed hollow structure's book core (4), the radian of the corner of rolling core (4) is alpha, and 0 is < alpha < 180.
2. The wound cell of claim 1, wherein: the radian alpha of the corner is more than or equal to 90 degrees and less than or equal to 120 degrees.
3. The wound cell of claim 1, wherein: the number of corners of the roll core (4) is 4-8.
4. The wound cell of claim 1, wherein: the number of the corners of the winding core (4) is 4, and the radian alpha of the 4 corners is 90 degrees.
5. The wound cell of claim 1, wherein: the arc edge at the corner of the winding core (4) is an arc or an elliptic arc.
6. The wound cell of claim 1, wherein: the pole piece of the transverse direction of the winding core (4) and the pole piece of the longitudinal direction of the winding core (4) are in smooth transition.
7. The wound cell of claim 1, wherein: the cross section of the hollow structure is polygonal or elliptical.
8. A battery, characterized by: comprising a winding cell according to any of claims 1 to 7 and a housing (5) adapted thereto, the winding cell being accommodated in the housing (5).
9. The utility model provides a battery module structure which characterized in that: comprising the battery of claim 8 and an assembled battery (6) matched with the battery, wherein the assembled battery (6) is accommodated in the hollow structure, and the assembled battery (6) is electrically connected with the battery.
10. The battery module structure according to claim 9, wherein: the top of battery is provided with contact terminal (7), contact terminal (7) set up relatively the both sides of battery, the top of assembled battery (6) be provided with utmost point post (61) that contact terminal (7) are connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010522862.6A CN111769334A (en) | 2020-06-10 | 2020-06-10 | Coiling electric core, battery and battery module structure |
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| CN202010522862.6A CN111769334A (en) | 2020-06-10 | 2020-06-10 | Coiling electric core, battery and battery module structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563560A (en) * | 2021-02-23 | 2021-03-26 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN115036587A (en) * | 2022-08-15 | 2022-09-09 | 中创新航科技股份有限公司 | Single battery, battery pack and electric equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112563560A (en) * | 2021-02-23 | 2021-03-26 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN112563560B (en) * | 2021-02-23 | 2021-05-18 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method for manufacturing battery cell |
| CN115036587A (en) * | 2022-08-15 | 2022-09-09 | 中创新航科技股份有限公司 | Single battery, battery pack and electric equipment |
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