CN112290031A - Electrode plate and energy storage device - Google Patents

Electrode plate and energy storage device Download PDF

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Publication number
CN112290031A
CN112290031A CN202011240492.3A CN202011240492A CN112290031A CN 112290031 A CN112290031 A CN 112290031A CN 202011240492 A CN202011240492 A CN 202011240492A CN 112290031 A CN112290031 A CN 112290031A
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China
Prior art keywords
base layer
energy storage
storage device
length direction
battery cell
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Pending
Application number
CN202011240492.3A
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Chinese (zh)
Inventor
程从贵
王超
冉昌林
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Wuhan Yifi Laser Corp Ltd
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Wuhan Yifi Laser Corp Ltd
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Priority to CN202011240492.3A priority Critical patent/CN112290031A/en
Publication of CN112290031A publication Critical patent/CN112290031A/en
Pending legal-status Critical Current

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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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/68—Current collectors characterised by their material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/70—Current collectors characterised by their structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66—Current collectors
    • H01G11/72—Current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/045—Cells or batteries with folded plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

The embodiment of the invention provides an electrode plate and an energy storage device, wherein the electrode plate is applied to a positive plate and a negative plate of the energy storage device and comprises a base layer, wherein a conductive region is arranged on the base layer, the conductive region is formed at one side edge close to the length direction of the base layer and extends along the length direction of the base layer, and notches which are arranged along the edge of the length direction of the base layer are formed on the conductive region; according to the invention, based on the improvement of the existing electrode plate, the end face of the cylindrical battery cell naturally forms the sink groove, so that the liquid can be conveniently injected into the cylindrical battery cell through the sink groove, the liquid injection time can be greatly shortened, the liquid injection cost can be reduced, the difficulty of liquid injection operation can be reduced, meanwhile, the uniformity of the electrolyte permeation in each cylindrical battery cell can be ensured, and the quality of the energy storage device can be improved.

Description

Electrode plate and energy storage device
Technical Field
The invention relates to the field of energy storage equipment, in particular to an electrode plate and an energy storage device.
Background
The energy storage device comprises a lithium ion battery, a lead-acid battery, a cadmium-nickel battery, a nickel-hydrogen battery, a super capacitor and the like, so that the energy storage device is used as a movable or temporary energy storage device and is widely applied to the fields of electric driving tools, medical appliances, navigation, aerospace and the like.
In the existing energy storage device, a cylindrical energy storage device is widely used, and a cylindrical battery cell is usually processed by adopting a winding type manufacturing process. Specifically, energy memory's cylinder electricity core stacks positive plate, diaphragm and negative pole piece in proper order, and form according to same orientation successive layer coiling, wherein, positive plate and negative pole piece arrange in proper order in turn, and be the dislocation arrangement along the width direction of positive plate and negative pole piece, the diaphragm is located between positive plate and the negative pole piece, the one end in order to form the anodal mass flow body of cylinder electricity core is assembled to the conduction region on the positive plate, the other end in order to form the negative pole mass flow body of cylinder electricity core is assembled to the conduction region on the negative pole piece.
However, the shape of the conventional positive and negative electrode sheets (electrode sheets for short) is too regular, and when the cylindrical battery cell is wound, the electrode sheets are subjected to high compressive strength along the edges of the electrode sheets in the length direction, so that the electrode sheets are easy to break; and, because the edge of electrode slice is too regular, rub the level processing back at the tip to cylinder electricity core, the both ends of cylinder electricity core are comparatively inseparable usually, lack the clearance, are difficult to annotate liquid to cylinder electricity core, not only lead to annotating the liquid operation degree of difficulty big, annotate liquid time long, annotate liquid equipment many, the cost is increased, in addition electrolyte can not permeate to cylinder electricity core uniformly, the uniformity that the electrolyte permeates directly influences the uniformity of cylinder electricity core performance to bring great influence to energy memory's quality.
Disclosure of Invention
The embodiment of the invention provides an electrode plate and an energy storage device, which are used for solving the problem that a cylindrical battery cell formed by winding a positive electrode plate and a negative electrode plate in the conventional energy storage device is difficult to inject liquid.
The embodiment of the invention also provides an electrode plate which is applied to a positive plate and a negative plate of an energy storage device and comprises a base layer, wherein the base layer is provided with a conductive region, the conductive region is formed at one side edge close to the length direction of the base layer and extends along the length direction of the base layer, and the conductive region is provided with notches arranged along the edge of the length direction of the base layer.
According to the electrode sheet of one embodiment of the present invention, the notch is formed in a predetermined length section starting from a head end of the base layer.
According to the electrode plate provided by one embodiment of the invention, the notches comprise a plurality of notches which are sequentially arranged at intervals along the length direction of the base layer; the shape of the notch is any one of rectangle, triangle, trapezoid, fan-shaped and arc; the indentation formed by the conductive region comprises a combination of at least one of the rectangle, the triangle, the trapezoid, the sector, and the arc.
According to the electrode sheet of one embodiment of the present invention, the notch is formed in a continuous long shape along the length direction of the base layer.
According to the electrode sheet of one embodiment of the present invention, the base layer is further formed with a coating region extending along a length direction of the base layer, the coating region and the conductive region are arranged along a width direction of the base layer, an end surface of the base layer corresponding to the coating region is formed with a coating layer, and an end surface of the base layer corresponding to the conductive region is formed with a conductive layer.
The electrode sheet according to an embodiment of the present invention further includes: an insulating coating; the insulating coating is formed on the end face of the base layer along the length direction of the base layer and is distributed at the joint part of the conductive region and the coating region side by side, the insulating coating is connected with the coating layer along one side edge of the length direction of the base layer, and the insulating coating is connected with the conductive layer along the other side edge of the length direction of the base layer.
The embodiment of the invention also provides an energy storage device which comprises a cylindrical battery cell, wherein the cylindrical battery cell comprises a positive plate, a diaphragm and a negative plate which are sequentially arranged in a laminated manner and wound into a whole, and the positive plate and the negative plate adopt the electrode plates.
According to the energy storage device of one embodiment of the invention, a sunken groove or a plurality of sunken points in discrete arrangement is formed in a circle center area corresponding to the end part of the cylindrical battery cell.
The energy storage device according to one embodiment of the invention further comprises a current collecting disc and a cylindrical shell; one end of the cylindrical battery cell forms a positive current collector, and the other end forms a negative current collector; the cylindrical battery cell is inserted into the cylindrical shell, the end face of the positive current collector and/or the end face of the negative current collector are/is connected with one disk face of the current collecting disk, and the other disk face of the current collecting disk is connected with the end part of the cylindrical shell.
The energy storage device further comprises a shell cover, wherein the current collecting disc is connected with the shell cover, and the shell cover is connected with the end part of the cylindrical shell, wherein the current collecting disc is connected with the shell cover in a surface contact mode, or the current collecting disc is connected with the shell cover through a conductive flexible connection, or a nested structure for conducting electricity is formed between the current collecting disc and the shell cover.
According to the electrode plate and the energy storage device provided by the embodiment of the invention, the gaps which are arranged along the edge of the length direction of the base layer are designed in the conductive area of the base layer, so that when the positive plate and the negative plate adopting the structural form are wound around the battery cell, the end surface of the cylindrical battery cell can naturally form the sunken groove, so that electrolyte can be conveniently injected into the cylindrical battery cell through the sunken groove, the electrolyte can quickly permeate into the cylindrical battery cell through the sunken groove, the electrolyte injection time can be greatly shortened, the electrolyte injection cost is reduced, the difficulty in electrolyte injection operation is reduced, meanwhile, the electrolyte permeation consistency in each cylindrical battery cell can be ensured, and the quality of the energy storage device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a first cross-sectional structure of an electrode sheet according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a second electrode sheet according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a third electrode sheet according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a fourth cross-sectional structure of an electrode sheet according to an embodiment of the present invention;
FIG. 5 is a schematic plan view of a first form of electrode sheet according to an embodiment of the present invention;
FIG. 6 is a schematic plan view of a second form of electrode sheet according to an embodiment of the present invention;
fig. 7 is a schematic plan development of a third structural form of the electrode sheet according to the embodiment of the present invention;
fig. 8 is a schematic plan development structure of a fourth structural form of the electrode sheet shown in the embodiment of the invention;
fig. 9 is a first structural diagram of an end face of a cylindrical battery cell formed by winding an electrode sheet according to an embodiment of the present invention;
fig. 10 is a second structural diagram of an end face of a cylindrical battery cell formed by winding an electrode sheet according to an embodiment of the present invention;
FIG. 11 is a schematic view of a first embodiment of an energy storage device according to the present invention;
FIG. 12 is a schematic diagram of a second configuration of an energy storage device in accordance with an embodiment of the present invention;
FIG. 13 is a schematic diagram of a third configuration of an energy storage device in accordance with an embodiment of the present invention;
FIG. 14 is a schematic diagram of a fourth configuration of an energy storage device in accordance with an embodiment of the present invention;
fig. 15 is a schematic view of a fifth configuration of an energy storage device according to an embodiment of the invention;
fig. 16 is a schematic view of a sixth construction of an energy storage device according to an embodiment of the invention;
fig. 17 is a schematic diagram of a seventh structure of the energy storage device according to the embodiment of the invention.
In the figure, 1, electrode sheet; 101. a base layer; 102. a coating layer; 103. a conductive layer; 104. an insulating coating; 110. a conductive region; 111. a coating area; 2. a notch; 3. a cylindrical cell; 31. sinking points; 32. a circular sink; 4. a current collecting plate; 5. a cylindrical shell; 6. a shell cover; 61. an end cap; 62. a pole column; 63. an insulating pad.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 in specific cases to those skilled in the art.
As shown in fig. 1 to 8, the present embodiment provides an electrode tab, where the electrode tab 1 is applied to a positive electrode tab and a negative electrode tab of an energy storage device, and includes a base layer 101 and a coating layer 102, where the base layer 101 is provided with a conductive region 110 and a coating region 111 extending along a length direction thereof; the coating layer 102 is formed on the end surface of the base layer 101 corresponding to the coating region 111; the conductive area 110 is distributed on one side of the coating area 111 along the width direction of the base layer 101 and is formed on one side close to the length direction of the base layer 101, and the conductive area 110 is formed with notches 2 arranged along the edge along the length direction of the base layer 101.
Specifically, this embodiment is through the breach 2 of arranging along the border at the length direction of basic unit 101 of conduction region 110 design at basic unit 101, then when adopting the positive plate of this structural style and negative pole piece coiling cylinder electricity core, can form the sink groove naturally at the terminal surface of cylinder electricity core, be convenient for annotate the liquid to the tip of cylinder electricity core through the sink groove, the notes liquid time has been reduced by a wide margin, make electrolyte reach unanimous infiltration effect in each electricity core, thereby energy memory's quality has been ensured, wherein, the energy memory that this embodiment shows includes but not limited to lithium ion battery, lead-acid battery, cadmium-nickel battery, nickel-hydrogen battery, super capacitor etc..
The electrode sheet 1 shown in this embodiment includes a positive electrode sheet and a negative electrode sheet of a corresponding cylindrical battery cell of the energy storage device, wherein the material of the corresponding base layer 101 of the positive electrode sheet is a copper foil, and the material of the corresponding base layer 101 of the negative electrode sheet is an aluminum foil. Since the positive electrode sheet and the negative electrode sheet of the energy storage device have the same structure regardless of the specific material, the electrode sheet 1 shown in the above embodiment may be applied to the positive electrode sheet and the negative electrode sheet of the energy storage device.
Meanwhile, the base layer 101, the coating layer 102, and the insulating coating layer 104 shown in the following examples are formed on both upper and lower end surfaces of the base layer 101, and perpendicular projections on both upper and lower end surfaces of the base layer 101 coincide with each other.
As shown in fig. 1, the electrode sheet 1 of the present embodiment may further include an insulating coating 104, where the insulating coating 104 is formed on an end surface of the base layer 101 along the length direction of the base layer 101 and arranged at a joint portion between the conductive region 110 and the coating region 111, and one side of the insulating coating 104 along the length direction of the base layer 101 is connected to the coating layer 102.
Specifically, this embodiment provides that the thickness of the insulating coating 104 is equal to the thickness of the coating layer 102 in fig. 1, and provides that the thickness of the insulating coating 104 is greater than the thickness of the coating layer 102 in fig. 2. In the embodiment, the thickness of the insulating coating 104 is optimally set, so that when the electrode plate 1 adopting the structure is used for winding the cylindrical battery cell, the two ends of the cylindrical battery cell directly reach better compactness.
As shown in fig. 3 to 4, in order to further ensure that the two ends of the cylindrical battery cell directly achieve a better compactness after being wound and formed, and ensure that the two ends of the cylindrical battery cell achieve a better conductive effect, in this embodiment, a conductive layer 103 may be further disposed on the end surface of the base layer 101 corresponding to the conductive region 110, so that the insulating coating 104 shown in the above embodiment is connected to the conductive layer 103 along the other side of the base layer 101 in the length direction.
Specifically, this embodiment specifically illustrates in fig. 3 that the thickness of the conductive layer 103 is equal to the thickness of the coating layer 102, and specifically illustrates in fig. 4 that the thickness of the conductive layer 103 is greater than the thickness of the coating layer 102. Of course, in this embodiment, the thickness of the conductive layer 103 may also be smaller than the thickness of the coating layer 102, and only in the process of winding the cylindrical battery cell, conductive strips arranged along the length direction of the conductive layer 103 need to be embedded between two adjacent positive plates or negative plates.
As shown in fig. 5 to 8, the notch 2 shown in this embodiment is formed in a preset length segment with a head end of the base layer 101 as a starting point, where the head end of the base layer 101 refers to a starting end of the corresponding electrode sheet when the cylindrical battery cell is wound layer by layer. From this, through set up at conductive area 110 and distribute in the breach 2 that uses the head end of basic unit 101 as the length section of predetermineeing of starting point, can make the regional heavy groove that corresponds this breach 2 that forms in the centre of a circle of the tip of winding shaping cylinder electricity core, because the heavy groove has certain degree of depth, thereby carry out the kneading level processing through the tip to cylinder electricity core, when guaranteeing the degree of compactness of cylinder electricity core tip, can not produce great influence to the heavy groove, so be convenient for carry out liquid injection processing to cylinder electricity core.
In one specific embodiment, the plurality of notches 2 shown in this embodiment are sequentially arranged at intervals along the length direction of the base layer 101; the shape of the gap 2 is any one of rectangle, triangle, trapezoid, fan-shaped and arc; the gap 2 formed in the conductive region 110 includes a combination of at least one of a rectangle, a triangle, a trapezoid, a fan shape, and an arc shape.
As shown in fig. 5, the conductive region 110 of the present embodiment is provided with a plurality of notches 2 sequentially arranged at intervals along the length direction of the base layer 101, and each notch 2 is rectangular.
As shown in fig. 6, the conductive region 110 of the present embodiment is provided with a plurality of notches 2 sequentially arranged at intervals along the length direction of the base layer 101, and each notch 2 is an arc.
As shown in fig. 7, the conductive region 110 of the present embodiment is provided with a plurality of gaps 2 sequentially arranged at intervals along the length direction of the base layer 101, and each gap 2 is trapezoidal.
In another embodiment, the notch 2 shown in this embodiment is formed in a continuous strip shape along the length direction of the base layer 101. As shown in fig. 8, the notch 2 shown in this embodiment is specifically rectangular, and the long side of the rectangle is arranged along the length direction of the base layer 101.
As shown in fig. 9 to 10, the present embodiment further provides an energy storage device based on the electrode sheet as described above, and the energy storage device includes a cylindrical battery cell 3.
In the case that a plurality of notches 2 are provided and are sequentially arranged at intervals along the length direction of the base layer 101, the circle center region of the end portion of the cylindrical battery core 3 shown in the present embodiment may be formed as a plurality of sinking points 31 which are arranged discretely as shown in fig. 9. Through setting up 2 spaced distances of breach, can make a plurality of heavy points 31 arrange in the centre of a circle region of the tip of cylinder electricity core 3 and be different shapes, wherein, specifically illustrated in fig. 9 a plurality of heavy points 31 are arranged along the radial form of dispersing of cylinder electricity core 3.
In the case where the notch 2 is formed in a continuous long shape along the length direction of the base layer 101, the center region of the end of the cylindrical battery cell 3 shown in this embodiment may be formed as a sunken groove as shown in fig. 10, and the sunken groove may be specifically a circular sunken groove 32.
As shown in fig. 11, the present embodiment proposes an energy storage device of a first structural form, which further includes a current collecting plate 4 and a cylindrical shell 5; the conductive area on the positive plate is gathered at one end of the cylindrical battery core 3 to form a positive current collector, and the conductive area on the negative plate is gathered at the other end of the cylindrical battery core 3 to form a negative current collector; the cylindrical battery core 3 is inserted into the cylindrical shell 5, the end surfaces of the anode current collector and the cathode current collector are connected with one disc surface of the current collecting disc 4 in a one-to-one correspondence manner, and the other disc surface of the current collecting disc 4 is connected with the end part of the cylindrical shell 5.
It should be noted here that the side wall of the cylindrical battery cell 3 shown in the present embodiment is formed with an insulating protective layer, and the wall surface of the insulating protective layer far from the cylindrical battery cell 3 is in contact with the inner side wall of the cylindrical shell 5; the current collecting disc 4 shown in this embodiment may be connected to the positive current collector and the negative current collector at two ends of the cylindrical electrical core 3 in a welding manner, wherein the current collecting disc 4 connected to the positive current collector may be connected to the cylindrical shell 5 through an insulating sleeve in an insulating manner, the current collecting disc 4 connected to the negative current collector may be connected to the cylindrical shell 5 in an insulating manner, or may be connected to the cylindrical shell 5 in a direct contact manner, and the edge of the cylindrical electrical core 3 may be pressed against another disc surface of the current collecting disc 4 by using a tool in a rolling and flanging manner, thereby fixing the current collecting disc 4.
As shown in fig. 12, based on the improvement of the energy storage device shown in fig. 11, the embodiment proposes an energy storage device with a second structural form, the energy storage device may be in a single-pole structural form, a positive terminal of the energy storage device is further provided with a case cover 6, the case cover 6 includes an end cover 61, a pole 62 and an insulating pad 63, the pole 62 is located in the middle of the end cover 61, and the pole 62 is connected with the end cover 61 through the insulating pad 63, wherein a limit groove adapted to an assembly hole in the middle of the end cover 61 is formed in a side surface of the pole 62, and the insulating pad 63 is embedded into the limit groove. After assembling cap 6 as an organic whole, the accessible frock centre gripping utmost point post 62 on the cap 6, with utmost point post 62 be close to cylindrical electric core 3 one end and conflict another quotation of current collector 4, treat that the quotation of current collector 4 contacts the back with cylindrical electric core 3's tip, only need seal can through the tip of the border of capper with end cover 61 and the corresponding end of cylindrical shell 5.
As shown in fig. 13, based on the improvement of the energy storage device shown in fig. 12, the present embodiment proposes an energy storage device of a third structural form, which may also be in the form of a bipolar column structure, and a cover 6 is correspondingly installed at both ends of the energy storage device.
As shown in fig. 14, based on the improvement of the energy storage device shown in fig. 11, the present embodiment proposes a fourth structural form of the energy storage device, where both ends of the cylindrical battery cell 3 of the energy storage device can be connected with the current collecting plate 4 by welding or pressing, the current collecting plate 4 is connected with one end of the conductive flexible connection, the other end of the conductive flexible connection is connected with the case cover 6, and the case cover 6 is connected with a port of the cylindrical case 5.
As shown in fig. 15, based on the improvement of the energy storage device shown in fig. 11, the embodiment proposes an energy storage device with a fifth structural form, in which a positive end of a cylindrical battery cell 3 of the energy storage device is connected to a current collecting plate 4 by welding or pressing, the current collecting plate 4 is connected to one end of a conductive flexible connection, the other end of the conductive flexible connection is connected to a case cover 6, the case cover 6 is connected to a port of the cylindrical case 5, and a negative end of the cylindrical battery cell 3 is directly connected to the cylindrical case 5, where the cylindrical case 5 has an open end, and the open end of the cylindrical case 5 faces the positive end of the cylindrical battery cell 3.
As shown in fig. 16, based on the improvement of the energy storage device shown in fig. 11, the embodiment proposes an energy storage device in a sixth structural form, where at a positive end of the energy storage device, the positive end of the cylindrical battery cell 3 may be connected to the current collecting plate 4 by welding or pressing, a first structure is formed in the middle of the current collecting plate 4, a second structure is arranged on the case cover 6 corresponding to the current collecting plate 4, and the first structure and the second structure form a nested structure for conducting electricity; at the negative end of the energy storage device, the negative end of the cylindrical battery cell 3 can be connected with the current collecting disc 4 in a welding or extruding mode, the end face of the current collecting disc 4 is directly and electrically connected with the shell cover 6, and the shell cover 6 is connected with the corresponding port of the cylindrical shell 5.
As shown in fig. 17, based on the improvement of the energy storage device shown in fig. 11, the embodiment proposes an energy storage device with a seventh structural form, where two ends of a cylindrical battery cell 3 of the energy storage device are both connected with one end of a current collecting plate 4 along a rim of the cylindrical battery cell 3, an end face of one side of the current collecting plate 4 is folded and pressed on an end portion of the cylindrical battery cell 3, a capping table-board is arranged on a case cover 6, and when the case cover 6 is mounted on a corresponding port of the cylindrical case 5, the capping table-board on the case cover 6 is directly pressed on an end face of the other side of the current collecting plate 4, so as to implement conductive connection between the current collecting plate 4 and the case cover 6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides an electrode slice, is applied to energy memory's positive plate and negative pole piece, its characterized in that includes: the basic unit, be equipped with the conducting region on the basic unit, the conducting region is formed at being close to the length direction's of basic unit a side, and follow the length direction of basic unit extends, the conducting region is formed with the edge the breach of arranging along the edge of the length direction of basic unit.
2. The electrode sheet as defined in claim 1, wherein the notch is formed in a predetermined length section starting from a head end of the base layer.
3. The electrode sheet according to claim 1, wherein the notch comprises a plurality of notches, and the notches are sequentially arranged at intervals along the length direction of the base layer; the shape of the notch is any one of rectangle, triangle, trapezoid, fan-shaped and arc; the indentation formed by the conductive region comprises a combination of at least one of the rectangle, the triangle, the trapezoid, the sector, and the arc.
4. The electrode sheet according to claim 1, wherein the notch is formed in a continuous elongated shape along a length direction of the base layer.
5. The electrode sheet according to any one of claims 1 to 4, wherein the base layer is further formed with a coating region extending in a length direction of the base layer, the coating region and the conductive region are arranged in a width direction of the base layer, an end surface of the base layer corresponding to the coating region is formed with a coating layer, and an end surface of the base layer corresponding to the conductive region is formed with a conductive layer.
6. The electrode sheet of claim 5, further comprising: an insulating coating; the insulating coating is formed on the end face of the base layer along the length direction of the base layer and is distributed at the joint part of the conductive region and the coating region side by side, the insulating coating is connected with the coating layer along one side edge of the length direction of the base layer, and the insulating coating is connected with the conductive layer along the other side edge of the length direction of the base layer.
7. An energy storage device comprises a cylindrical battery cell, wherein the cylindrical battery cell comprises a positive plate, a diaphragm and a negative plate which are sequentially arranged in a laminated manner and wound into a whole, and the energy storage device is characterized in that the positive plate and the negative plate adopt the electrode plates according to any one of claims 1 to 6.
8. The energy storage device as claimed in claim 7, wherein a sunken groove or a plurality of discretely arranged sunken points are formed in a corresponding circle center region of the end of the cylindrical cell.
9. An energy storage device as claimed in claim 7 or 8, further comprising a collector disc and a cylindrical shell; one end of the cylindrical battery cell forms a positive current collector, and the other end forms a negative current collector; the cylindrical battery cell is inserted into the cylindrical shell, the end face of the positive current collector and/or the end face of the negative current collector are/is connected with one disk face of the current collecting disk, and the other disk face of the current collecting disk is connected with the end part of the cylindrical shell.
10. The energy storage device of claim 9, further comprising a housing cover, wherein the current collecting plate is connected with the housing cover, and the housing cover is connected with an end of the cylindrical housing, wherein the current collecting plate is connected with the housing cover in a surface contact manner, or the current collecting plate is connected with the housing cover through a conductive flexible connection, or a nested structure for conducting electricity is formed between the current collecting plate and the housing cover.
CN202011240492.3A 2020-11-09 2020-11-09 Electrode plate and energy storage device Pending CN112290031A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2151007A1 (en) * 2021-08-19 2023-02-20 Northvolt Ab A cylindrical secondary cell with a conductive sheet comprising flaps
SE2151006A1 (en) * 2021-08-19 2023-02-20 Northvolt Ab Cylindrical battery cell with notches
WO2023097627A1 (en) * 2021-12-02 2023-06-08 Techtronic Cordless Gp Enhanced electrolyte infiltration in a battery cell

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2151007A1 (en) * 2021-08-19 2023-02-20 Northvolt Ab A cylindrical secondary cell with a conductive sheet comprising flaps
SE2151006A1 (en) * 2021-08-19 2023-02-20 Northvolt Ab Cylindrical battery cell with notches
SE545608C2 (en) * 2021-08-19 2023-11-07 Northvolt Ab A cylindrical secondary cell with a conductive sheet comprising flaps
SE545601C2 (en) * 2021-08-19 2023-11-07 Northvolt Ab Cylindrical battery cell with notches
WO2023097627A1 (en) * 2021-12-02 2023-06-08 Techtronic Cordless Gp Enhanced electrolyte infiltration in a battery cell

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