CN209709099U - Secondary cell - Google Patents

Secondary cell Download PDF

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Publication number
CN209709099U
CN209709099U CN201920716991.1U CN201920716991U CN209709099U CN 209709099 U CN209709099 U CN 209709099U CN 201920716991 U CN201920716991 U CN 201920716991U CN 209709099 U CN209709099 U CN 209709099U
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CN
China
Prior art keywords
area
contact conductor
step area
thickness
secondary cell
Prior art date
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Active
Application number
CN201920716991.1U
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Chinese (zh)
Inventor
谢绵钰
伍永彬
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Priority to CN201920716991.1U priority Critical patent/CN209709099U/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/12—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • 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)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The utility model provides a kind of secondary cell comprising electrode assembly, packaging bag, contact conductor and insulating part.Electrode assembly is contained in packaging bag, and the edge of packaging bag has sealing, and contact conductor is connected to electrode assembly and passes through sealing.Sealing includes body region, first step area and First Transition area, first step area is located at the two sides of contact conductor through-thickness, body region and First Transition area are located at the same side of first step area in the width direction, and First Transition area is connected between first step area and body region.Insulating part ring separates sealing and contact conductor；Insulating part includes first part, and first part is between contact conductor and first step area.The sum of the thickness in first step area, first part and contact conductor is H1, body region with a thickness of H2, H1>H2.The minimum range of the outer surface in contact conductor and First Transition area is D1, the minimum range of the outer surface in contact conductor and first step area is D2, D1≥D2。

Description

Secondary cell
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cells.
Background technique
With the fast development of portable electronic device, the requirement to battery energy density is also higher and higher.In secondary electricity Chi Zhong can be used the packaging bag made of aluminum plastic film or steel plastic film to replace metal shell, to reduce the weight of battery, improve energy Metric density.
The electrode assembly of secondary cell is housed in packaging bag, and the edge of packaging bag can be connected by hot sealing, and Form sealing.Certainly, in order to realize the charge and discharge of electrode assembly, secondary cell further includes contact conductor and insulating part, electrode Lead is connected to electrode assembly and extends to the outside of packaging bag, and insulating part is looped around the outside of contact conductor and by contact conductor It is separated with sealing.However, sealing there are difference in height and forms step close to the region at insulating part edge, it is close in hot pressing Envelope portion is easy to generate fold or breakage at step, influences the sealing performance of packaging bag.
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of secondary cells, can drop The risk that low packaging bag is punctured improves the sealing performance of packaging bag, improves security performance.
To achieve the goals above, the utility model provides a kind of secondary cell comprising electrode assembly, packaging bag, Contact conductor and insulating part.Electrode assembly is contained in packaging bag, and the edge of packaging bag has sealing, and contact conductor is connected to Electrode assembly simultaneously passes through sealing.Sealing includes body region, first step area and First Transition area, and first step area is located at electricity The two sides of pole lead through-thickness, body region and First Transition area are located at the same side of first step area in the width direction, and First Transition area is connected between first step area and body region.Insulating part is looped around the outside of contact conductor, and by sealing It is separated with contact conductor；Insulating part includes first part, and in a thickness direction, first part is located at contact conductor and first step Contact conductor is covered between area and from two sides.The sum of the thickness in first step area, first part and contact conductor is H1, main body Area with a thickness of H2, H1>H2.The minimum range of the outer surface in contact conductor and First Transition area is D1, contact conductor and First The minimum range of the outer surface in rank area is D2, D1≥D2。
First Transition area connects body region and first step area, and First Transition area has two that through-thickness is oppositely arranged A outer surface, and two outer surfaces are tilted relative to body region towards the direction close to first step area.
The angle of the outer surface of the outer surface and first step area in First Transition area is 100 °~170 °.
Contact conductor includes matrix part and edge part, and edge part is connected to matrix part and is located at matrix part and leans in the width direction The side in nearly First Transition area.Along the direction far from matrix part, the thickness of edge part is gradually reduced.
Edge part has the first surface towards first step area, and matrix part has the second table towards first step area Face.First surface is connected with second surface, and the angle of the two is more than or equal to 120 °.
The minimum thickness of edge part is greater than 100 μm.
In the width direction, the ratio between the size of edge part and the size of matrix part are 0.1-0.4.
In the width direction, first step area exceeds contact conductor.Insulating part further includes second part, second part and first Part is connected, and part of the first step area beyond contact conductor covers second part from two sides.
Sealing includes second step area, and second step area connects body region and First Transition area.Insulating part further includes Three parts and Part IV, Part III extend from one end of the separate contact conductor of second part, and Part IV is from third portion One end of the separate second part divided extends.In a thickness direction, First Transition area covers Part III, second step from two sides Area covers Part IV from two sides.The sum of thickness of second step area and Part IV is H4, and H2<H4<H1。
The minimum thickness of edge part is H5, H5<H4。
The direction of Part IV is directed toward along second part, the thickness of Part III is gradually reduced.
D2Value be greater than 150um.
Packaging bag includes two layers of packaging film, and electrode assembly is located between two layers of packaging film, and two layers of packaging film connects at edge And form sealing.Each packaging film includes protective layer, metal layer and articulamentum, articulamentum be set to metal layer towards electrode group The surface of part, protective layer are set to the surface of the separate electrode assembly of metal layer.In body region, the articulamentum of two layers of packaging film is molten It is connected in one；Articulamentum in first step area, each packaging film is fused to first part.
The beneficial effects of the utility model are as follows: since there are differences in height between body region and first step area, so During hot pressing, First Transition area is stretched, its intensity is caused to become smaller.Therefore, the preferred D of the application1≥D2, to reduce by first The risk that transition region is punctured by the end of contact conductor improves the sealing performance of packaging bag, improves security performance.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the first embodiment of the secondary cell of the utility model.
Fig. 2 is the cross-sectional view according to the secondary cell of the utility model.
Fig. 3 is the enlarged drawing of the Blocked portion of Fig. 2.
Fig. 4 is another cross-sectional view of the secondary cell of Fig. 1.
Fig. 5 is the enlarged drawing of the Blocked portion of Fig. 4.
Fig. 6 is the schematic diagram according to the packaging film of the packaging bag of the secondary cell of the utility model.
Fig. 7 is the cross-section diagram of the packaging film of Fig. 6.
Fig. 8 is the schematic diagram according to the secondary cell of the utility model before the forming.
Fig. 9 is the enlarged drawing of the Blocked portion of Fig. 8.
Figure 10 is the schematic diagram according to the secondary cell of the utility model in forming process.
Figure 11 is another schematic diagram according to the secondary cell of the utility model in forming process.
Figure 12 is the schematic diagram according to the contact conductor of the secondary cell of the utility model.
Figure 13 is the schematic diagram according to the second embodiment of the secondary cell of the utility model.
Figure 14 is the schematic diagram according to the 3rd embodiment of the secondary cell of the utility model.
Wherein, the reference numerals are as follows:
1 electrode assembly
2 packaging bags
21 sealings
211 body regions
212 first step areas
213 second step areas
214 First Transition areas
215 second transition regions
22 packaging films
221 protective layers
222 metal layers
223 articulamentums
3 contact conductors
31 matrix parts
32 edge parts
4 insulating parts
41 first parts
42 second parts
43 Part III
44 Part IV
5 sealed in unit
51 first encapsulating faces
52 second encapsulating faces
53 third encapsulating faces
6 colloids
X length direction
Y width direction
Z thickness direction
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and It is not used in restriction the application.
In the description of the present application unless specifically defined or limited otherwise, term " first ", " second ", " third ", " the 4th " is only used for the purpose of description, is not understood to indicate or imply relative importance；Term " multiple " refer to two with Upper (including two)；Unless otherwise prescribed or illustrate, term " connection " shall be understood in a broad sense, for example, " connection " can be fixation Connection, may be a detachable connection, or be integrally connected, or electrical connection or signal connection；" connection " can be direct phase It even, can also be indirectly connected through an intermediary.For the ordinary skill in the art, it can manage as the case may be Solve the concrete meaning of above-mentioned term in this application.
In the description of this specification, it is to be understood that the nouns of locality such as "upper", "lower" described in the embodiment of the present application are With angle shown in the drawings come what is be described, the restriction to the embodiment of the present application should not be construed as.Below by specific reality It applies example and the application is described in further detail in conjunction with attached drawing.
Referring to Figures 1 and 2, in the first embodiment, the secondary cell of the application includes electrode assembly 1, packaging bag 2, electricity Pole lead 3 and insulating part 4.
Electrode assembly 1 is the core component that secondary cell realizes charging/discharging function.Electrode assembly 1 includes anode pole piece, bears Pole pole piece and diaphragm, diaphragm separate anode pole piece and cathode pole piece.Anode pole piece includes plus plate current-collecting body and is coated on positive The positive electrode active material layer of collection liquid surface, plus plate current-collecting body can be aluminium foil, and positive electrode active material layer includes ternary material, mangaic acid Lithium or LiFePO4.Cathode pole piece includes negative current collector and the negative electrode active material layer coated on negative current collector surface, is born Pole collector can be copper foil, and negative electrode active material layer includes graphite or silicon.
Electrode assembly 1 can be takeup type structure.Specifically, anode pole piece and cathode pole piece are one, and anode pole piece It is banded structure with cathode pole piece.Anode pole piece, diaphragm and cathode pole piece are stacked gradually and wind two circles or more to form electricity Pole component 1.When preparing electrode assembly 1, electrode assembly 1 can first be wound into hollow column construction, and it is flat for flattening again after winding It is flat-shaped.
Alternatively, electrode assembly 1 can also be laminated structure.Specifically, anode pole piece is set as multiple, cathode pole piece It is set as multiple, the multiple anode pole piece and cathode pole piece through-thickness Z are alternately laminated, and diaphragm is by anode pole piece and cathode Pole piece separates.
Packaging bag 2 includes two layers of packaging film 22, and two layers of packaging film, the 22 through-thickness Z is setting up and down.Reference Fig. 6, At least one layer of packaging film 22 is by being stamped and formed out cavity, and electrode assembly 1 is located between two layers of packaging film 22 and is contained in cavity It is interior.
Referring to Fig. 7, each packaging film 22 includes protective layer 221, metal layer 222 and articulamentum 223, protective layer 221 and connection Layer 223 is respectively arranged at the two sides of metal layer 222.Specifically, protective layer 221 can be fixed on metal layer 222 by bonding agent Surface far from electrode assembly 1, articulamentum 223 can be fixed on the table of the close electrode assembly 1 of metal layer 222 by bonding agent Face.The thickness of packaging film 22 can be 0.1mm-0.3mm.
The material of protective layer 221 can be nylon or polyethylene terephthalate, and the material of metal layer 222 can be aluminium foil Or steel foil, the material of articulamentum 223 can be polypropylene.
Two layers of packaging film 22 connects at edge and forms sealing 21.Specifically, pass through hot pressing, the company of two layers of packaging film 22 It connects layer 223 to be directly or indirectly connected together, to form the packaging bag 2 of sealing.
Contact conductor 3 is connected to electrode assembly 1, across sealing 21 and extends to outside packaging bag 2.Specifically, electrode Lead 3 can be two, and a contact conductor 3 is connected to the plus plate current-collecting body of anode pole piece, another contact conductor 3 is connected to negative The negative current collector of pole pole piece.Electrode assembly 1 is connect by two contact conductors 3 with other components outside packaging bag 2, Jin Ershi The charge and discharge of existing electrode assembly 1.The material of contact conductor 3 can be aluminium, nickel or copper nickel plating.
Two contact conductors 3 can be stretched out from the both ends of the X along its length of packaging bag 2 respectively, can also be from packaging bag 2 along length The same end of direction X is stretched out.
Insulating part 4 can be two.Two insulating parts 4 respectively separate two contact conductors 3 with sealing 21.Each insulating part 4 are looped around the outside of a corresponding contact conductor 3.A part of insulating part 4 is clamped between two layers of packaging film 22, thus by electric Pole lead 3 is separated with packaging film 22, reduces the risk that contact conductor 3 is contacted with metal layer 222.The material of insulating part 4 can be poly- Propylene.
Since a part of insulating part 4 is clamped between two layers of packaging film 22, when carrying out heat to two layers of packaging film 22 When pressure, the articulamentum 223 of two layers of packaging film 22 can be fused to insulating part 4.
Specifically, referring to Fig. 4 and Fig. 5, sealing 21 includes body region 211, first step area 212 and First Transition area 214.First step area 212 is located at the two sides of 3 through-thickness Z of contact conductor, and body region 211 and First Transition area 214 are located at The same side of the Y in the width direction of first step area 212, and First Transition area 214 is connected to first step area 212 and body region Between 211.
Insulating part 4 includes first part 41, and on thickness direction Z, first part 41 is located at contact conductor 3 and first step Contact conductor 3 is covered between area 212 and from two sides.First step area 212 divides for upper layer and lower layer, and first part 41 is located at two Between floor first step area 212.
Articulamentum 223 in first step area 212, each packaging film 22 is fused to first part 41.Through-thickness Z, the The sum of thickness of one stepped region 212, first part 41 and contact conductor 3 is H1。H1Generally definite value, certainly, due to heat pressing process Reason, H1It may fluctuate in a certain range, such as positive and negative 0.01mm.
In body region 211, the articulamentum 223 of two layers of packaging film 22 is directly fused to be integrated.On thickness direction Z, main body Area 211 with a thickness of H2。H2Generally definite value, certainly, due to heat pressing process, the thickness H of body region 2112It may be one Determine fluctuation in range, such as positive and negative 0.01mm.H2Value can be 0.2mm-0.4mm.
In body region 211, two layers of packaging film 22 is directly fused together；And in first step area 212, two layers of packaging film 22 It is welded together with the first part 41 of insulating part 4.Therefore, H2Value can be less than H1Value, body region 211 and first step area There can be difference in height between 212.The First Transition area 214 being connected between body region 211 and first step area 212 can play The effect of transition.
For the welding in realization body area 211 and the welding in first step area 212, it will usually using with step encapsulation The sealed in unit 5 in face.Specifically, referring to Fig. 8 and Fig. 9, sealed in unit 5 includes the first encapsulating face 51 and the second encapsulating face 52, the Two encapsulating faces 52 are recessed relative to the first encapsulating face 51.When hot pressing, the first encapsulating face 51 acts on body region 211, and the second envelope Dress face 52 acts on first step area 212.
0 and Figure 11 referring to Fig.1, during hot pressing, first part 41 and the articulamentum positioned at first step area 212 223 melted by heat simultaneously generate the sticking colloid 6 of tool, and part colloid 6 flow to First Transition area 214 under the effect of the pressure Gap, colloid 6 fills the gap and the articulamentum 223 for being located at First Transition area 214 bonds together, and then realizes close Envelope.
However, the end of contact conductor 3 is easy to produce stress concentration during hot pressing, meanwhile, 41 quilt of first part It is ironed；If first part 41 is excessively thin, the stress in the end of contact conductor 3 is easy to puncture first part 41, even Sealing 21 leads to the metal layer 222 in electrolytic corrosion sealing 21, to reduce the sealing performance of packaging bag 2.In addition, When the metal layer 222 of contact conductor 3 and sealing 21 contacts, it is easy to cause short-circuit risks.
Referring to Fig. 5, the minimum range of the outer surface in contact conductor 3 and first step area 212 is D2.Contact conductor 3 is substantially For the thin slice for being parallel to length direction X, so in the plane perpendicular to length direction X, contact conductor 3 and first step area The distance of 212 outer surface is minimum.And the thin slice due to first step area 212 generally perpendicular to thickness direction Z, D2Generally Minimum range of the outer surface in contact conductor 3 and first step area 212 on thickness direction Z.D2Value it is smaller, first step area 212 easier are punctured by contact conductor 3；And D2Value can be changed by compression ratio of the control first part 41 in hot pressing Become.Therefore, the application can make D according to demand2Value meet certain range, 150um is greater than, to avoid electrode from drawing Line 3 punctures first step area 212.
The minimum range of the outer surface in contact conductor 3 and First Transition area 214 is D1.Similarly, contact conductor 3 is generally It is parallel to the thin slice of length direction X, so in the plane perpendicular to length direction X, contact conductor 3 and First Transition area 214 Outer surface distance it is minimum.And since First Transition area 214 is located at the side of the Y in the width direction of first step area 212, so Contact conductor 3 is minimum at a distance from the outer surface in First Transition area 214 in the end on width direction Y.Similarly, D1Value get over Small, First Transition area 214 is easier to be punctured by contact conductor 3.
However, since there are differences in height between body region 211 and first step area 212, so during hot pressing, the One transition region 214 can be tilted towards the direction close to body region 211 and contact conductor 3；Meanwhile First Transition area 214 is stretched.The After one transition region 214 is stretched, thickness and intensity become smaller, if D1Value be less than D2Value, First Transition area 214 be easy It is punctured by the end of contact conductor 3, to reduce the sealing performance of packaging bag 2, causes short-circuit risks.Therefore, the application is preferred D1≥D2, to reduce the risk that packaging bag 2 is punctured, improve security performance.
First Transition area 214 connects body region 211 and first step area 212, and First Transition area 214 has through-thickness Two outer surfaces that Z is oppositely arranged, and two outer surfaces are inclined relative to body region 211 towards the direction close to first step area 212 Tiltedly.The outer surface of the outer surface connection body region 211 in First Transition area 214 and the outer surface in first step area 212.First Transition The outer surface in area 214 can extend from the end of the outer surface in first step area 212, and the appearance relative to first step area 212 Face the direction inclination close to the outer surface of body region 211.On thickness direction Z, two outer surfaces in First Transition area 214 Spacing is L.The direction of contact conductor 3 is directed toward along body region 211, the value of L is gradually increased.
Referring to Fig. 5, the angle α of the outer surface of the outer surface and first step area 212 in First Transition area 214 for 100 °~ 170°.The value of α is smaller, and First Transition area 214 is closer at a distance from the end of contact conductor 3, that is to say, that D1Value may Smaller, the risk that First Transition area 214 is punctured by contact conductor 3 is also higher.It is therefore preferred that the value of α is not less than 100 °. Work as H1And H2Value when determining, the value of α is bigger, and the outer surface in First Transition area 214 is gentler, accordingly, First Transition area 214 Size on width direction Y is also bigger.And since size of the secondary cell on width direction Y is limited, First Transition area 214 is bigger in width direction Y the space occupied, and the space that other components (such as contact conductor 3) can utilize is also just smaller.Cause This, in order to avoid First Transition area 214 occupies excessive space, the value of α is not more than 170 °.
Referring to Fig. 5 and Figure 12, contact conductor 3 includes matrix part 31 and edge part 32, and edge part 32 is connected to matrix part 31 And it is located at side of the Y close to First Transition area 214 in the width direction of matrix part 31.Compared with matrix part 31, edge part 32 is more leaned on Nearly First Transition area 214；Further, one end of the separate matrix part 31 of edge part 32 at a distance from First Transition area 214 most It is small.
D1Value by edge part 32 and spacing and edge part 32 and first mistake of the First Transition area 214 on width direction Y Spacing of the area 214 on thickness direction Z is crossed to determine.In order to increase D1Value, the application reduces the thickness of edge part 32.Separately Outside, in order to reduce edge part 32 and matrix part 31 junction stress, realize smooth transition, it is preferable that along far from matrix part The thickness in 31 direction, edge part 32 is gradually reduced.
Edge part 32 has the first surface towards first step area 212, and first surface is connected to first part 41.Due to The thickness of edge part 32 is gradually reduced, so first surface is relative to the datum level inclination perpendicular to thickness direction Z.First surface It is faced each other for two and through-thickness Z.
Matrix part 31 has the second surface towards first step area 212, and second surface is connected to first part 41.Second Surface is the plane generally perpendicular to thickness direction Z.Second surface is two and through-thickness Z and faces each other.
Preferably, referring to Fig.1 2, first surface is connected with second surface, and the angle β of the two is more than or equal to 120 °.First Surface and the junction of second surface will form seamed edge, and stress concentration is easy to produce at seamed edge.If the value of β is too small, at seamed edge Compare sharp, when hot pressing punctures first part 41 and the risk in first step area 212 is also higher.Therefore, in order to reduce by first The risk that part 41 and first step area 212 are punctured, β are preferably greater than 120 °.
Referring to Fig.1 2, the area in the section perpendicular to length direction X of contact conductor 3 determines the overcurrent of contact conductor 3 Ability.If 32 thickness of edge part is too small, the conveyance capacity that will lead to contact conductor 3 is insufficient；Meanwhile 32 thickness of edge part is too small When, the intensity of contact conductor 3 also can be less than normal, is easily deformed.Therefore, in order to guarantee the area of passage and intensity of contact conductor 3, side The minimum thickness H of edge 325Greater than 100 μm.
Y in the width direction, the ratio between size and the size of matrix part 31 of edge part 32 are 0.1-0.4.The thickness of edge part 32 Degree is smaller, and conveyance capacity and intensity are respectively less than matrix part 31, if the ratio is greater than 0.4, edge part 32 has larger Size, this will lead to, and the whole area of passage of contact conductor 3 is insufficient, and intensity is on the weak side.Thickness and edge part when matrix part 31 32 minimum thickness H5When determining, the size of the Y in the width direction of edge part 32 is smaller, and the value of β is bigger.Therefore, if it is described Ratio is less than 0.1, it will causes the value of β excessive, the risk that first part 41 and first step area 212 are punctured is higher.Therefore, Preferably, Y in the width direction, the ratio between size and the size of matrix part 31 of edge part 32 are 0.1-0.4.
Y in the width direction, the size in first step area 212 are greater than the size of contact conductor 3.Preferably, first step area 212 in the width direction Y exceed contact conductor 3.In other words, first step area 212 in the width direction Y close to body region 211 One end exceeds contact conductor 3, and first step area 212 also exceeds contact conductor 3 in the one end of Y far from body region 211 in the width direction.
In this application, by increasing the size of the Y in the width direction of first step area 212, First Transition area can be increased 214 and edge part 32 width direction Y distance, to increase D1Value, reduce security risk.
Insulating part 4 further includes second part 42, and second part 42 is connected with first part 41, and first step area 212 exceeds The part of contact conductor 3 covers second part 42 from two sides.First part 41 is divided into upper layer and lower layer by contact conductor 3, and Two parts 42 link together two layers of first part 41.The sum of second part 42 and the thickness in first step area 212 are H3。 Before hot pressing, H3And H1Value be substantially the same, but contact conductor 3 be metal, it is not compressible, so H after hot pressing3Value may H can be slightly less than1Value.
Sealing 21 includes second step area 213, and second step area 213 connects body region 211 and First Transition area 214. On width direction Y, second step area 213 is between body region 211 and First Transition area 214.Insulating part 4 further includes third Part 43 and Part IV 44, Part III 43 extend from one end of the separate contact conductor 3 of second part 42, Part IV 44 Extend from one end of the separate second part 42 of Part III 43.On thickness direction Z, First Transition area 214 is covered from two sides Part III 43, second step area 213 cover Part IV 44 from two sides.
In First Transition area 214, the articulamentum 223 of two layers of packaging film 22 is fused to Part III 43；In second step area 213, the articulamentum 223 of two layers of packaging film 22 is fused to Part IV 44.
The sum of thickness of second step area 213 and Part IV 44 is H4, and H2<H4<H1。H4Generally definite value, certainly, by In heat pressing process reason, H4It may fluctuate in a certain range, such as positive and negative 0.01mm.H4Value can be 0.3mm-0.9mm.
First part 41 and contact conductor 3 are equipped between first step area 212, two sides packaging film 22, so H2And H1Tool There is biggish difference.When hot pressing, the degree that First Transition area 214 is stretched is larger, leads to the metal positioned at First Transition area 214 Layer 222 is damaged, influences sealing performance.In order to reduce the degree that First Transition area 214 is stretched, the application is preferably provided with second Rank area 213.Second step area 213 can play the role of transition, reduce the difference in height in second step area 213 and body region 211 It is reduced with the difference in height in second step area 213 and first step area 212 to reduce the degree that First Transition area 214 is stretched Stress is concentrated, and sealing performance is improved.
Work as H1Value when determining, can pass through and increase H4Value increase the value of α, and then increase D1Value；Similarly, It can be by reducing H5Value increase D1Value.That is, H4Value and H5Value to D1Value have direct influence.Shen It asks someone to comprehensively consider H4And H5, it is preferable that H5<H4.At this point it is possible to guarantee edge part 32 and First Transition area 214 in vertical direction It is spaced enough distances on Z, increases D1Value, to improve sealing performance.
Since First Transition area 214 is obliquely installed, so in order to guarantee that Part III 43 can be pasted with First Transition area 214 It closes, avoids Part III 43 from stopping deformation of the First Transition area 214 in hot pressing, Part III 43 needs to have inclined Surface.In other words, the direction of Part IV 44 is directed toward along second part 42, the thickness of Part III 43 is gradually reduced.Third The minimum thickness of part 43 is equal to the thickness of Part IV 44, and the maximum gauge of Part III 43 is equal to the thickness of second part 42 Degree.
For hot pressing second step area 213, sealed in unit 5 further includes third encapsulating face 53.Third encapsulating face 53 is located at the Between one encapsulating face 51 and the second encapsulating face 52；Relative to the first encapsulating face 51, degree that third encapsulating face 53 is recessed is less than the The degree of two encapsulating faces 52 recess.
Preferably, sealing 21 further includes the second transition region 215, and the second transition region 215 is connected to body region 211 and second Between stepped region 213.Referring to Fig.1 0, due to fabrication error, when hot pressing, may be deposited between body region 211 and Part IV 44 In a certain distance, cause the second transition region 215 that can not be bonded with Part IV 44.At this point, in the second transition region 215, two layers There are gaps between packaging film 22.Outside, in hot pressing, the second transition region 215 is heeling condition, not will receive third encapsulating face 53 Pressure.Therefore, in the second transition region 215, the articulamentum 223 of two layers of packaging film 22 can not it is directly fused together.
Referring to Fig.1 1, during hot pressing, Part IV 44 and articulamentum 223 positioned at second step area 213 are heated It melts and generates the sticking colloid 6 of tool, part colloid 6 flow to the gap of the second transition region 215, glue under the effect of the pressure Body 6 fills the gap and the articulamentum 223 for being located at the second transition region 215 bonds together, and then realizes sealing.
The other embodiments of the secondary cell of the application are illustrated below.To simplify the description, only main below to be situated between The difference of the other embodiments that continue and first embodiment, the part not described are referred to first embodiment and are understood.
Referring to Fig.1 3, in a second embodiment, second step area 213 can be omitted.The application can be by increasing First In the width direction the size of Y and second part 42 is arranged in rank area 212, Lai Zeng great D1Value.Increase D1Value, packaging can be reduced The risk that bag 2 is punctured improves security performance.
Referring to Fig.1 4, in the third embodiment, the size of the Y in the width direction of contact conductor 3 can be equal to or more than first The size of stepped region 212.At this point, second part 42 omits.The application increases D by reducing the thickness of edge part 321Value, To reduce the risk that packaging bag 2 is punctured, security performance is improved.Certainly, compared with embodiment one, in order to make D1Value meet It is required that the edge part 32 of 3rd embodiment needs to have smaller thickness.

Claims (13)

1. a kind of secondary cell, which is characterized in that including electrode assembly (1), packaging bag (2), contact conductor (3) and insulating part (4)；
Electrode assembly (1) is contained in packaging bag (2), and the edge of packaging bag (2) has sealing (21), and contact conductor (3) is even It is connected to electrode assembly (1) and passes through sealing (21)；
Sealing (21) includes body region (211), first step area (212) and First Transition area (214), first step area (212) it is located at the two sides of contact conductor (3) through-thickness (Z), body region (211) and First Transition area (214) are located at first The same side of stepped region (212) (Y) in the width direction, and First Transition area (214) are connected to first step area (212) and main body Between area (211)；
Insulating part (4) is looped around the outside of contact conductor (3), and sealing (21) and contact conductor (3) are separated；Insulating part It (4) include first part (41), on thickness direction (Z), first part (41) is located at contact conductor (3) and first step area (212) contact conductor (3) are covered between and from two sides；
The sum of the thickness in first step area (212), first part (41) and contact conductor (3) is H1, the thickness of body region (211) For H2, H1>H2；
The minimum range of the outer surface of contact conductor (3) and First Transition area (214) is D1, contact conductor (3) and first step area (212) minimum range of outer surface is D2, D1≥D2。
2. secondary cell according to claim 1, which is characterized in that
First Transition area (214) connects body region (211) and first step area (212), and First Transition area (214) have along thickness Two outer surfaces that direction (Z) is oppositely arranged, and two outer surfaces relative to body region (211) towards close to first step area (212) direction inclination.
3. secondary cell according to claim 2, which is characterized in that the outer surface of First Transition area (214) and First The angle of the outer surface in rank area (212) is 100 °~170 °.
4. secondary cell according to claim 1, which is characterized in that
Contact conductor (3) includes matrix part (31) and edge part (32), and edge part (32) are connected to matrix part (31) and are located at base Body portion (31) in the width direction (Y) close to First Transition area (214) side；
Along the direction far from matrix part (31), the thickness of edge part (32) is gradually reduced.
5. secondary cell according to claim 4, which is characterized in that
Edge part (32) has the first surface towards first step area (212), and matrix part (31) has towards first step area (212) second surface, first surface are connected with second surface, and the angle of the two is more than or equal to 120 °.
6. secondary cell according to claim 4, which is characterized in that the minimum thickness of edge part (32) is greater than 100 μm.
7. secondary cell according to claim 4, which is characterized in that (Y) in the width direction, the size of edge part (32) with The ratio between size of matrix part (31) is 0.1-0.4.
8. secondary cell according to claim 4, which is characterized in that
(Y) in the width direction, first step area (212) exceed contact conductor (3)；
Insulating part (4) further includes second part (42), and second part (42) is connected with first part (41), first step area (212) part beyond contact conductor (3) covers second part (42) from two sides.
9. secondary cell according to claim 8, which is characterized in that
Sealing (21) includes second step area (213), and second step area (213) connect body region (211) and First Transition area (214)；
Insulating part (4) further includes Part III (43) and Part IV (44), and Part III (43) is remote from second part (42) One end from contact conductor (3) extends, and Part IV (44) prolongs from one end of the separate second part (42) of Part III (43) It stretches；
In a thickness direction, First Transition area (214) cover Part III (43) from two sides, and second step area (213) are from two sides It covers Part IV (44)；
The sum of thickness of second step area (213) and Part IV (44) is H4, and H2<H4<H1。
10. secondary cell according to claim 9, which is characterized in that the minimum thickness of edge part (32) is H5, H5<H4。
11. secondary cell according to claim 9, which is characterized in that be directed toward Part IV (44) along second part (42) Direction, the thickness of Part III (43) is gradually reduced.
12. secondary cell according to claim 1, which is characterized in that D2Value be greater than 150um.
13. secondary cell according to claim 1, which is characterized in that
Packaging bag (2) includes two layers of packaging film (22), and electrode assembly (1) is located between two layers of packaging film (22), two layers of packaging film (22) it is connected at edge and forms sealing (21)；
Each packaging film (22) includes protective layer (221), metal layer (222) and articulamentum (223), and articulamentum (223) is set to gold Belong to the surface towards electrode assembly (1) of layer (222), protective layer (221) is set to the separate electrode assembly of metal layer (222) (1) surface；
Articulamentum (223) welding in body region (211), two layers of packaging film (22) is integrated；In first step area (212), respectively The articulamentum (223) of packaging film (22) is fused to first part (41).
CN201920716991.1U 2019-05-17 2019-05-17 Secondary cell Active CN209709099U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110190316A (en) * 2019-05-17 2019-08-30 宁德时代新能源科技股份有限公司 Secondary battery
CN113871808A (en) * 2021-10-25 2021-12-31 珠海冠宇电池股份有限公司 Soft package lithium ion battery and electronic device
CN114361737A (en) * 2020-09-29 2022-04-15 宁德新能源科技有限公司 Battery and electronic device using same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110190316A (en) * 2019-05-17 2019-08-30 宁德时代新能源科技股份有限公司 Secondary battery
CN111952655A (en) * 2019-05-17 2020-11-17 宁德时代新能源科技股份有限公司 Secondary battery
WO2020233276A1 (en) * 2019-05-17 2020-11-26 宁德时代新能源科技股份有限公司 Secondary battery
CN111952655B (en) * 2019-05-17 2024-01-26 宁德时代新能源科技股份有限公司 Secondary battery
CN110190316B (en) * 2019-05-17 2024-05-10 宁德时代新能源科技股份有限公司 Secondary battery
CN114361737A (en) * 2020-09-29 2022-04-15 宁德新能源科技有限公司 Battery and electronic device using same
CN113871808A (en) * 2021-10-25 2021-12-31 珠海冠宇电池股份有限公司 Soft package lithium ion battery and electronic device
CN113871808B (en) * 2021-10-25 2024-03-26 珠海冠宇电池股份有限公司 Soft package lithium ion battery and electronic device

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