CN112290030A - Electrode plate and energy storage device - Google Patents
Electrode plate and energy storage device Download PDFInfo
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- CN112290030A CN112290030A CN202011239164.1A CN202011239164A CN112290030A CN 112290030 A CN112290030 A CN 112290030A CN 202011239164 A CN202011239164 A CN 202011239164A CN 112290030 A CN112290030 A CN 112290030A
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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
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- 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
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- 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
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- 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
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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
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/045—Cells or batteries with folded plate-like electrodes
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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
- 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
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
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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, a coating layer and a conducting layer, the base layer is provided with a conducting region and a coating region which extend along the length direction of the base layer, and the conducting region is distributed on one side edge of the coating region along the width direction of the base layer; the coating layer is formed on the end face of the base layer corresponding to the coating area; the conductive layer is formed on the end surface of the base layer corresponding to the conductive area; when the electrode plate disclosed by the invention is used for winding the cylindrical battery cell, the two ends of the cylindrical battery cell can directly reach the consistent compactness, so that the two ends of the cylindrical battery cell are conveniently and reliably connected with the current collecting disc, and the two ends of the cylindrical battery cell can be subjected to kneading treatment without kneading treatment, so that the processing technology of the energy storage device is greatly simplified.
Description
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 electrical equipment, electric driving tools, medical appliances, navigation, aerospace and the like.
In the existing energy storage device, the cylindrical structure is widely used, and the cylindrical battery core of the energy storage device 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 conventional positive plate and the conventional negative plate have simple structures and single functions, and both of the structures include a coating region provided with a coating layer and an exposed conductive region. At present, after coiling cylindrical electric core, the both ends of cylindrical electric core can be loose state usually, not only are difficult to reach better water conservancy diversion effect, also are inconvenient for be connected cylindrical electric core's tip directly and utmost point ear reliably moreover. Therefore, after the cylindrical battery cell of the energy storage device is wound and molded, the two ends of the cylindrical battery cell must be subjected to rubbing treatment, so that the two ends of the cylindrical battery cell reach a compact state, and the reliability of connection between the end part of the cylindrical battery cell and the electrode lug is ensured.
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 the two ends of a cylindrical battery cell which is formed by winding a positive electrode plate and a negative electrode plate in the conventional energy storage device are in a loose shape and the rubbing treatment is required.
The embodiment of the invention 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, a coating layer and a conductive layer, wherein the base layer is provided with a conductive region and a coating region which extend along the length direction of the base layer, and the conductive region is distributed on one side edge of the coating region along the width direction of the base layer; the coating layer is formed on the end face of the base layer corresponding to the coating area; the conductive layer is formed on the end surface of the base layer corresponding to the conductive region.
The electrode sheet according to one embodiment of the present invention further includes an insulating coating layer formed on an end surface of the base layer in a length direction of the base layer and disposed at a junction of the conductive region and the coating region.
According to the electrode plate provided by the embodiment of the invention, the insulating coating is connected with the conductive layer along one side edge of the base layer in the length direction, the coating layer is connected with the insulating coating along the other side edge of the base layer in the length direction, and the thickness of the insulating coating is greater than or equal to that of the coating layer.
According to the electrode sheet of one embodiment of the present invention, the thickness of the conductive layer is smaller than that of the coating layer; alternatively, the thickness of the conductive layer is equal to the thickness of the coating layer; alternatively, the thickness of the conductive layer is greater than the thickness of the coating 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 provided by the embodiment of the invention, the cylindrical battery cell further comprises the conductive strips, the conductive strips are embedded between the adjacent positive plates and/or the adjacent negative plates, the long edges of the conductive strips are arranged along the length direction of the positive plates or the negative plates, and the wide edges of the conductive strips correspond to the conductive regions on the positive plates or the negative plates.
According to the energy storage device of one embodiment of the invention, in the case that the thickness of the conductive layer on the electrode sheet is greater than the thickness of the coating layer, the thickness of the conductive layer on the positive electrode sheet in the cylindrical battery cell is less than or equal to the distance between the base layers of two adjacent positive electrode sheets, and the thickness of the conductive layer on the negative electrode sheet in the cylindrical battery cell is less than or equal to the distance between the base layers of two adjacent negative electrode sheets.
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 conductive layer is arranged on the end surface corresponding to the conductive region of the base layer, and the conductive layer is distributed on one side of the coating layer on the corresponding end surface of the base layer, so that when the positive plate and the negative plate adopting the structural form are wound on the cylindrical battery cell, the positive current collector and the negative current collector at two ends of the cylindrical battery cell can directly reach the consistent compactness, the two ends of the cylindrical battery cell are conveniently and reliably connected with the current collecting discs, and therefore, the rubbing treatment can be carried out on the two ends of the cylindrical battery cell, the rubbing treatment can also be not required, and the processing technology of the energy storage device is greatly simplified.
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 cross-sectional view of a fifth electrode sheet according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a planar development structure of a stacked arrangement of a positive plate, a diaphragm and a negative plate of a cylindrical battery cell according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the stacked cross-sectional structures of the positive electrode sheet, the separator and the negative electrode sheet of the cylindrical battery cell according to the embodiment of the present invention, when the electrode sheet shown in fig. 3 is used as the positive electrode sheet and the negative electrode sheet;
fig. 8 is a schematic diagram of the stacked cross-sectional structures of the positive electrode sheet, the separator and the negative electrode sheet of the cylindrical battery cell according to the embodiment of the present invention, when the electrode sheet shown in fig. 4 is used as the positive electrode sheet and the negative electrode sheet;
fig. 9 is a schematic diagram of a stacked arrangement cross-sectional structure of a positive plate, a diaphragm and a negative plate of a cylindrical battery cell according to an embodiment of the present invention, when the electrode sheet shown in fig. 5 is used as the positive plate and the negative plate;
FIG. 10 is a schematic view of a first embodiment of an energy storage device according to the present invention;
FIG. 11 is a schematic diagram of a second configuration of an energy storage device in accordance with an embodiment of the present invention;
FIG. 12 is a schematic diagram of a third configuration of an energy storage device in accordance with an embodiment of the present invention;
FIG. 13 is a schematic diagram of a fourth configuration of an energy storage device in accordance with an embodiment of the present invention;
fig. 14 is a schematic view of a fifth construction of an energy storage device according to an embodiment of the invention;
fig. 15 is a schematic view of a sixth configuration of an energy storage device according to an embodiment of the invention;
fig. 16 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; 11. a positive plate; 12. a negative plate; 13. a diaphragm; 2. a conductive strip; 3. a cylindrical cell; 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 5, the present embodiment provides an electrode sheet, where the electrode sheet 1 includes a base layer 101, a coating layer 102 and a conductive layer 103, the base layer 101 is provided with a conductive region 110 and a coating region 111 extending along a length direction of the base layer 101, and the conductive region 110 is distributed on one side of the coating region 111 along a width direction of the base layer 101; the coating layer 102 is formed on the end surface of the base layer 101 corresponding to the coating region 111; the conductive layer 103 is formed on the end surface of the base layer 101 corresponding to the conductive region 110.
Specifically, in this embodiment, the conductive layer 103 is disposed on the end surface corresponding to the conductive region 110 of the base layer 101, and the conductive layer 103 is disposed on one side of the coating layer 102 on the corresponding end surface of the base layer 101, so that when the positive plate and the negative plate in the structural form are wound around the cylindrical electrical core, the positive current collector and the negative current collector at two ends of the cylindrical electrical core can directly reach a consistent tightness, so that two ends of the cylindrical electrical core are reliably connected to the current collecting disc, and here, the rubbing treatment can be performed on two ends of the cylindrical electrical core, and the rubbing treatment is also not required, so that the processing process of the energy storage device is greatly simplified. The squaring method for rubbing the two ends of the cylindrical battery cell shown in this embodiment includes ultrasonic flattening, mechanical flattening, and flattening by squeezing.
The electrode sheet 1 shown in this embodiment includes a positive electrode sheet 11 and a negative electrode sheet 12 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 11 is a copper foil, and the material of the corresponding base layer 101 of the negative electrode sheet 12 is an aluminum foil. Since the positive electrode tab 11 and the negative electrode tab 12 of the energy storage device have the same structure regardless of the specific material, the electrode tab 1 shown in the above embodiment may be applied to the positive electrode tab 11 and the negative electrode tab 12 of the energy storage device.
Meanwhile, the base layer 101, the coating layer 102, the conductive layer 103, 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 are overlapped.
The cylindrical battery cell of the energy storage device is formed by sequentially stacking the positive plate 11, the diaphragm 13 and the negative plate 12 and winding the positive plate, the diaphragm 13 and the negative plate layer by layer in the same direction. As shown in fig. 4, the positive plates 11 and the negative plates 12 of the cylindrical cell are sequentially and alternately arranged, and are arranged in a staggered manner along the width direction of the positive plates 11 and the negative plates 12, the diaphragm 13 is located between the positive plates 11 and the negative plates 12, and correspondingly covers the coating area on the positive plates 11 and the coating area on the negative plates 12, wherein the conductive area on the positive plates 11 is collected at one end of the cylindrical cell to form a positive current collector, and the conductive area on the negative plates 12 is collected at the other end of the cylindrical cell to form a negative current collector.
As shown in fig. 1 to 5, the electrode sheet 1 of the present embodiment further includes an insulating coating 104, and the insulating coating 104 is formed on an end surface of the base layer 101 along a length direction of the base layer 101 and is disposed at a joint portion of the conductive region 110 and the coating region 111.
Specifically, in this embodiment, the conductive layer 103 is not provided on the conductive region 110 on the electrode pad 1 shown in fig. 1 and 2, but the thickness of the insulating coating 104 on the electrode pad 1 shown in fig. 1 and 2 is equal to or greater than the thickness of the corresponding coating layer 102, and the thickness of the insulating coating 104 on the electrode pad 1 shown in fig. 2 is greater than the thickness of the insulating coating 104 on the electrode pad 1 shown in fig. 1.
In fig. 3 to 5, the insulating coating 104 shown in this embodiment is connected to the conductive layer 103 along one side of the base layer 101 in the length direction, and the insulating coating 104 is connected to the coating layer 102 along the other side of the base layer 101 in the length direction. The present embodiment may provide the insulating coating 104 with a thickness equal to or greater than the thickness of the coating layer 102. In fig. 4, it is specifically illustrated that the thickness of the insulating coating 104 is equal to the thickness of the coating layer 102, and in fig. 5, it is specifically illustrated that the thickness of the insulating coating 104 is greater than the thickness of the coating layer 102.
Since the thickness of the coating region 111 corresponding to the electrode sheet 1 is much greater than that of the corresponding region of the conductive region 110 in the case that the coating layer 102 is disposed on the coating region 111, the present embodiment can effectively protect the joint portion of the conductive region 110 and the coating region 111 by disposing the insulating coating 104.
As shown in fig. 1 to fig. 5, in order to ensure that the positive electrode current collector and the negative electrode current collector at both ends of the cylindrical battery cell achieve a better compactness after the cylindrical battery cell is wound, the thickness of the conductive layer 103 shown in this embodiment is greater than or equal to the thickness of the coating layer 102, and of course, the thickness of the conductive layer 103 may be smaller than the thickness of the coating layer 102.
The width of the conductive area of the traditional electrode plate is usually 8-12mm, and the conductive area of the electrode plate is an exposed base material, so that the end part of the cylindrical battery cell is fluffy after the cylindrical battery cell is wound, and the two ends of the cylindrical battery cell must be kneaded in order to ensure the flow guide effect of the two ends of the cylindrical battery cell. However, in this embodiment, the conductive layer 103 is disposed on the conductive region 110 of the electrode sheet 1, and the thickness of the conductive layer 103 is designed, so that the two ends of the cylindrical battery cell formed by winding directly achieve a better compactness, and thus the width of the conductive region 110 distributed along the width direction of the base layer 101 may be set to be 3-5 mm.
Preferably, the present embodiment proposes an energy storage device based on the electrode sheets as shown above, and the arrangement of the positive electrode sheet 11, the separator 13 and the negative electrode sheet 12 in the cylindrical cell of the energy storage device is as shown in fig. 6.
As shown in fig. 7, in order to ensure that the two ends of the cylindrical battery cell formed by winding directly achieve a better compactness when the thickness of the conductive layer 103 is less than or equal to the thickness of the coating layer 102, the cylindrical battery cell shown in this embodiment is further provided with conductive strips 2, the conductive strips 2 are embedded between adjacent positive plates 11 and/or adjacent negative plates 12, the long sides of the conductive strips 2 are arranged along the length direction of the positive plates 11 or the negative plates 12, and the wide sides of the conductive strips 2 correspond to the conductive regions 110 on the positive plates 11 or the negative plates 12.
As shown in fig. 8, in the case where the conductive strip 2 is not provided at the end of the cylindrical cell, it is at least ensured that the thickness of the conductive layer 103 is equal to or greater than the thickness of the coating layer 102. Considering that a certain gap exists between the positive electrode plate 11 and the separator 13 and between the separator 13 and the negative electrode plate 12, it is also ensured that the thickness of the conductive layer 103 on the positive electrode plate 11 is less than or equal to half of the distance D1 between the base layers 101 of two adjacent positive electrode plates 11 in the cylindrical cell, and the thickness of the conductive layer 103 on the negative electrode plate 12 is less than or equal to half of the distance D2 between the base layers 101 of two adjacent negative electrode plates 12 in the cylindrical cell. By setting the thickness of the conductive layer 103, the two ends of the cylindrical battery core formed by winding can directly reach better compactness,
as shown in fig. 9, under the condition that the conductive strip 2 is not disposed at the end of the cylindrical battery cell, the cylindrical battery cell shown in this embodiment may also use the electrode sheet shown in fig. 5, and by setting the thickness of the insulating coating 104 to be greater than the thickness of the coating layer 102, in the winding process of the cylindrical battery cell, the end surface of the insulating coating 104 abuts against the diaphragm 13, and the side surface of the insulating coating 104 abuts against the side edge of the corresponding conductive layer, so that the two ends of the cylindrical battery cell reach the consistent compactness after winding.
As shown in fig. 10, 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. 11, based on the improvement of the energy storage device shown in fig. 10, 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. 12, based on the improvement of the energy storage device shown in fig. 11, 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. 13, based on the improvement of the energy storage device shown in fig. 10, 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. 14, based on the improvement of the energy storage device shown in fig. 10, 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 with a current collecting plate 4 by welding or pressing, the current collecting plate 4 is connected with one end of a conductive flexible connection, the other end of the conductive flexible connection is connected with a case cover 6, the case cover 6 is connected with a port of the cylindrical case 5, and a negative end of the cylindrical battery cell 3 is directly connected with 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. 15, based on the improvement of the energy storage device shown in fig. 10, 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 extrusion connection mode, the end face of the current collecting disc 4 is directly 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. 16, based on the improvement of the energy storage device shown in fig. 10, 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 face 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 face 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 (9)
Priority Applications (1)
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| CN202011239164.1A CN112290030A (en) | 2020-11-09 | 2020-11-09 | Electrode plate and energy storage device |
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| CN202011239164.1A CN112290030A (en) | 2020-11-09 | 2020-11-09 | Electrode plate and energy storage device |
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| CN112290030A true CN112290030A (en) | 2021-01-29 |
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| CN (1) | CN112290030A (en) |
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