CN115810758A - Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device - Google Patents

Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device Download PDF

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Publication number
CN115810758A
CN115810758A CN202111074499.7A CN202111074499A CN115810758A CN 115810758 A CN115810758 A CN 115810758A CN 202111074499 A CN202111074499 A CN 202111074499A CN 115810758 A CN115810758 A CN 115810758A
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China
Prior art keywords
electrode
current collector
cell
lug
material layer
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CN202111074499.7A
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Chinese (zh)
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辛民昌
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Jiuhuan Energy Storage Technology Co ltd
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Jiuhuan Energy Storage Technology Co ltd
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Priority to CN202111074499.7A priority Critical patent/CN115810758A/en
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The invention discloses a current collector, an electric core, a laminated electric core, an electric core monomer and an energy storage device.A lug partition is arranged on the long edge of an electrode area, and the length of the long edge of the electrode area is greater than the length of the wide edge of the electrode area, so that electrons can be conducted towards the lug partition closest to the current collector in a current collector body, and the conducting distance of the electrons in the current collector body can be reduced; similarly, the length of the electrode area can be set according to different use scenes without limitation, and only the lug partitions are arranged on the long edge of the electrode area according to the set spacing distance; through reducing electron conduction distance, can reduce the resistance of electron conduction, reduce the inside heat that produces because of the resistance of electric core to can control electric core better and generate heat, improve electric core operational safety and stability.

Description

Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device
Technical Field
The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a current collector, an electric core, a laminated electric core, an electric core monomer and an energy storage device.
Background
The surface area of the existing battery cell is generally small, so that the lug of the battery cell can be arranged at any position, and the position where the lug is arranged cannot cause large influence on the resistance of electronic conduction in the battery cell. With the development of the technology, the surface area of the battery cell is larger and larger, and the capacity of a single battery cell is increased. However, in the conventional battery cell, tabs are still arranged at two end positions in the length direction of the battery cell, and when electrons are conducted from one end of the current collector to the other end of the current collector, the conduction path is long, and the resistance of conduction is increased. When the resistance is increased due to the increase of the electronic conduction path in the current collector, the heat productivity in the battery cell due to the increase of the resistance is correspondingly increased, which is not beneficial to the safety of the battery cell.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a current collector, a battery cell, a stacked battery cell, a battery cell monomer, and an energy storage device, which can effectively reduce the length of an electron conduction path, thereby reducing the resistance of the current collector.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention firstly provides a current collector, which comprises a current collector body, wherein an electrode area and a tab area are arranged on the current collector body, and the electrode area is square and has a length L 0 And width W 0 And L is 0 ＞W O ；
The tab area comprises one or at least two tab subareas arranged at intervals, and the side length of the tab subareas is L 0 On the edge of (a).
Furthermore, the lug partitions are arranged on one side of the electrode area, and the side length of one side of the lug partition is L 0 The edge of (a); or the lugs are respectively arranged on the two side lengths of the electrode area in a partitioning manner and have the length of L 0 On the edge of (a).
Furthermore, when the electrode lugs are respectively arranged on the two side lengths of the electrode area in a partitioning manner, the side lengths are L 0 When the side of the electrode is in a circle, the side length of all the electrode lug subareas parallel to the electrode area is L 0 Has a gap between the projections on the straight line of the sides.
Further, the side length of the electrode area is W 0 The edge of the battery is provided with at least one lug partition at intervals.
The invention also provides a battery cell, which comprises a first current collector and a second current collector, wherein a first electrode material layer is arranged on the first current collector, and a second electrode material layer is arranged on the second current collector; a solid electrolyte layer is arranged between the first electrode material layer and the second electrode material layer, or a diaphragm and electrolyte are arranged between the first electrode material layer and the second electrode material layer;
the first current collector and the second current collector are both the current collectors; enabling an electrode area and an electrode lug area arranged on the first current collector to be a first electrode area and a first electrode lug area respectively; the electrode area and the lug area which are arranged on the second current collector are respectively a second electrode area and a second lug area; the first electrode material layer is arranged on the first electrode area, and the second electrode material layer is arranged on the second electrode area; the first pole ear area is formed into a first pole ear in a pole ear partition mode, and the second pole ear area is formed into a second pole ear in a pole ear partition mode.
Further, in the view direction perpendicular to the first current collector, the electrode areas of the first current collector and the second current collector are overlapped, the first tab and the second tab are arranged on the same side of the electrode area, or the first tab and the second tab are respectively arranged on two sides of the electrode area.
The invention also provides a laminated battery cell, which comprises at least two battery cells, wherein the first current collector or the second current collector of two adjacent battery cells are laminated together; one or at least two first tabs are correspondingly arranged on all the first current collectors, and the correspondingly arranged first tabs are connected together; all the second current collectors are correspondingly provided with one or at least two second pole ears, and the correspondingly arranged second pole ears are connected together.
Further, in a direction perpendicular to a view of the first current collector, all of the first electrode regions and the second electrode regions coincide; the first pole lugs which are correspondingly arranged are partially or completely overlapped, and the second pole lugs which are correspondingly arranged are partially or completely overlapped.
Further, when the same side of the first electrode area and the second electrode area is simultaneously provided with the first pole lug and the second pole lug, a gap is formed between the first pole lug and the second pole lug which are arranged on the same side.
Further, the first electrode regions and the second electrode regions are arranged on the same side of the first electrode regions and the second electrode regions in a staggered mode.
Furthermore, the first electrode lugs which are correspondingly arranged are connected in a welding mode, and the second electrode lugs which are correspondingly arranged are connected in a welding mode.
The invention also provides a laminated battery cell which comprises at least three first laminated current collectors arranged at intervals, wherein the side surfaces of two sides of each first laminated current collector are provided with a third electrode material layer or a fourth electrode material layer; the third electrode material layer and the fourth electrode material layer are respectively arranged on the opposite side surfaces of the two adjacent first laminated current collectors; a solid electrolyte layer is arranged between the third electrode material layer and the fourth electrode material layer, or a diaphragm and electrolyte are arranged between the third electrode material layer and the fourth electrode material layer;
all the first laminated current collectors adopt the current collectors; the first laminated current collector provided with the third electrode material layer is a third current collector, and the first laminated current collector provided with the fourth electrode material layer is a fourth current collector;
the third electrode material layer is arranged on the electrode region of the third current collector, and the fourth electrode material layer is arranged on the electrode region of the fourth current collector; the lug partition of the third current collector forms a third lug, and the lug partition of the fourth current collector forms a fourth lug;
one or at least two third lugs are correspondingly arranged on all the third current collectors, and the correspondingly arranged third lugs are connected together; all the fourth current collectors are correspondingly provided with one or at least two fourth lugs, and the fourth lugs are correspondingly connected together.
Further, in a view direction perpendicular to the third current collector, the electrode regions of all the third current collector and the fourth current collector are overlapped; the third pole ears which are correspondingly arranged are partially or completely overlapped, and the fourth pole ears which are correspondingly arranged are partially or completely overlapped.
Further, when the same side of the third electrode region and the fourth electrode region is simultaneously provided with the third tab and the fourth tab, a gap is formed between the third tab and the fourth tab.
Further, the third electrode regions and the fourth electrode regions are arranged on the same side of the third electrode regions and the fourth electrode regions in a staggered mode.
Furthermore, the correspondingly arranged third lugs are connected by welding, and the correspondingly arranged fourth lugs are connected by welding.
The invention also provides a laminated battery cell which comprises at least two first battery cell units which are laminated together, wherein an insulating isolation layer is arranged between every two adjacent first battery cell units;
the first cell unit comprises at least one cell device, the cell device comprises a fifth current collector and a sixth current collector, a fifth electrode material layer is arranged on the fifth current collector, a sixth electrode material layer is arranged on the sixth current collector, a solid electrolyte layer is arranged between the fifth electrode material layer and the sixth electrode material layer, or a diaphragm and electrolyte are arranged between the fifth electrode material layer and the sixth electrode material layer;
the fifth current collector and the sixth current collector adopt the current collectors; the fifth electrode material layer is arranged on the electrode region of the fifth current collector, and the sixth electrode material layer is arranged on the electrode region of the sixth current collector; the lug partition of the fifth current collector forms a fifth lug, and the lug partition of the sixth current collector forms a sixth lug;
the first cell unit comprises one cell device or at least two cell devices, and when the first cell unit comprises at least two cell devices, fifth current collectors or sixth current collectors of two adjacent cell devices are overlapped together; one or at least two fifth tabs are correspondingly arranged on all the fifth current collectors in the first battery cell unit, and the correspondingly arranged fifth tabs are connected together; one or at least two sixth pole lugs are correspondingly arranged on all the sixth current collectors in the first battery cell unit, and the correspondingly arranged sixth pole lugs are connected together;
and in two adjacent first cell units, the fifth tab of one of the first cell units and the sixth tab of the other first cell unit are connected together.
Further, in a view direction perpendicular to the fifth current collector, the electrode regions of all the fifth current collector and the sixth current collector are overlapped; in the same first cell unit, the correspondingly arranged fifth tabs are partially or completely overlapped, and the correspondingly arranged sixth tabs are partially or completely overlapped.
Further, in the same first cell unit, when the fifth tab and the sixth tab are simultaneously disposed on the same side of the fifth electrode region and the sixth electrode region, a gap is formed between the fifth tab and the sixth tab.
Further, the fifth electrode lugs and the sixth electrode lugs arranged on the same side of the fifth electrode zone and the sixth electrode zone are arranged in a staggered mode.
Further, all the fifth tabs in the first cell unit are connected in a welding mode; all the sixth pole lugs in the first battery cell unit are connected in a welding mode; in two adjacent first cell units, the fifth tab of one of the first cell units is welded to the sixth tab of the other first cell unit.
Further, in two adjacent first battery cell units, a fifth tab of one of the first battery cell units is arranged corresponding to a sixth tab of the other second battery cell unit; in a view direction perpendicular to the fifth current collector, a fifth tab and a sixth tab, which are correspondingly disposed in two adjacent first cell units, are partially or completely overlapped.
The invention also provides a laminated battery cell which comprises at least two second battery cell units which are laminated together, wherein an insulating isolation layer is arranged between every two adjacent second battery cell units;
the second battery cell unit comprises at least three second laminated current collectors arranged at intervals, and a seventh electrode material layer or an eighth electrode material layer is arranged on the side surfaces of two sides of each second laminated current collector; the seventh electrode material layer and the eighth electrode material layer are respectively arranged on the opposite side surfaces of the two adjacent second laminated current collectors; a solid electrolyte layer is arranged between the seventh electrode material layer and the eighth electrode material layer, or a diaphragm and electrolyte are arranged between the seventh electrode material layer and the eighth electrode material layer;
all the second laminated current collectors adopt the current collectors; the second laminated current collector provided with the seventh electrode material layer is a seventh current collector, and the second laminated current collector provided with the eighth electrode material layer is an eighth current collector; the seventh electrode material layer is arranged on the electrode region of the seventh current collector, and the eighth electrode material layer is arranged on the electrode region of the eighth current collector; the lug partition of the seventh current collector forms a seventh lug, and the lug partition of the eighth current collector forms an eighth lug;
one or at least two seventh tabs are correspondingly arranged on all the seventh current collectors in the second battery cell unit, and the correspondingly arranged seventh tabs are connected together; one or at least two eighth pole lugs are correspondingly arranged on all the eighth current collectors in the second battery cell unit, and the correspondingly arranged eighth pole lugs are connected together;
and in two adjacent second cell units, the seventh tab of one of the second cell units and the eighth tab of the other second cell unit are connected together.
Further, in a direction perpendicular to a view of the seventh current collectors, the electrode regions of all of the seventh and eighth current collectors coincide; in the same second cell unit, the seventh tabs correspondingly arranged are partially or completely overlapped, and the eighth tabs correspondingly arranged are partially or completely overlapped.
Further, in the same second cell unit, when the seventh tab and the eighth tab are simultaneously disposed on the same side of the seventh electrode region and the eighth electrode region, a gap is formed between the seventh tab and the eighth tab.
Further, the seventh electrode lug and the eighth electrode lug which are arranged on the same side of the seventh electrode zone and the eighth electrode zone are arranged in a staggered mode.
Further, all the seventh tabs in the second cell unit are connected by welding; all the eighth pole lugs in the second battery cell unit are connected in a welding mode; in two adjacent second cell units, the seventh tab of one of the second cell units is welded to the eighth tab of the other second cell unit.
Further, in two adjacent second cell units, a seventh tab of one of the second cell units is arranged corresponding to an eighth tab of the other second cell unit; in a view direction perpendicular to the seventh current collector, a seventh tab and an eighth tab correspondingly arranged in two adjacent second cell units are partially or completely overlapped.
The invention also provides a battery cell monomer which comprises a monomer shell, wherein the laminated battery cell is arranged in the monomer shell.
Further, the single shell is rectangular and is provided with a long edge, a wide edge and a thick edge, the long edge of the single shell is parallel to the long edge of the electrode area, and the wide edge of the single shell is parallel to the wide edge of the electrode area; the side surfaces with the side length being the long side and the thick side of the monomer shell are monomer side surfaces, the monomer side surfaces are provided with liquid injection ports for injecting electrolyte, and the tab area is provided with through holes for circulating the electrolyte.
Further, the two monomer side surfaces of the monomer shell are respectively provided with the liquid injection port.
Furthermore, at least two liquid injection ports are respectively arranged on the side surfaces of the single bodies at intervals.
Furthermore, the side surfaces with the side length of the wide edge and the thick edge of the monomer shell are monomer end surfaces, monomer tabs are arranged on the monomer shell, and the monomer tabs are arranged on the monomer side surfaces and/or the monomer end surfaces.
Further, the monomer utmost point ear includes first monomer utmost point ear and second monomer utmost point ear, first monomer utmost point ear and second monomer utmost point ear set up respectively two on the monomer side, or first monomer utmost point ear and second monomer utmost point ear set up respectively two on the monomer terminal surface.
Furthermore, the monomer side is provided with at least one of the first monomer tab or the second monomer tab at intervals.
The invention also provides an energy storage device which comprises a box body, wherein at least one battery cell monomer is arranged in the box body.
Further, the box body is cuboid, and the box body has a length L, a width W and a height H; the single body is cuboid and has a length L ', a width W ' and a thickness T '; two side surfaces with the length of length L and the height H in the box body are taken as installation surfaces, and the width W of the box body and the length L' of the single body meet the following requirements:
L＝L’+δ 1 or L =2L' + δ 2
Wherein, delta 1 And delta 2 Respectively, the thickness occupied by other accessory structures in the tank width direction.
Furthermore, one of the two installation surfaces of the box body is an openable operation surface, the other installation surface is a positioning surface, a single body inserting structure for inserting the energy storage single body is arranged on the positioning surface, and the energy storage single body is inserted in the single body inserting structure through the operation surface array; or the like, or, alternatively,
the energy storage device is characterized in that a middle positioning plate parallel to the mounting surface is arranged in the box body, the side surfaces of two sides of the middle positioning plate are positioning surfaces, the positioning surfaces are provided with single body inserting structures for inserting the energy storage monomers, the mounting surfaces of the box body are openable operation surfaces, and the energy storage monomers are inserted and mounted on the single body inserting structures through the operation surface arrays.
Furthermore, a stabilizing device used for enabling the energy storage single body to keep stable is arranged in the box body.
Furthermore, partition plates are arranged between the two installation surfaces of the box body at intervals, a plurality of installation grooves are formed in the box body, and a plurality of battery cell monomers form a monomer cluster and are installed in the installation grooves; a single lug is arranged on the single shell, and a first lug matching structure matched with the single lug is arranged on the side surface of the mounting groove in the length direction of the box body when the single lug is arranged on the side surface of the single shell; monomer utmost point ear sets up when on the monomer terminal surface, the mounting groove is located box width direction ascending both ends be equipped with monomer utmost point ear complex second utmost point ear cooperation structure.
The invention has the beneficial effects that:
according to the current collector, the electrode lug partitions are arranged on the long edges of the electrode areas, the length of the long edges of the electrode areas is larger than the length of the long edges of the electrode areas, electrons can be conducted towards the electrode lug partitions closest to the electrodes in the current collector body, and therefore the conducting distance of the electrons in the current collector body can be reduced; similarly, the length of the electrode area can be set according to different use scenes without limitation, and only the lug partitions are arranged on the long edges of the electrode area according to the set spacing distance; through reducing electron conduction distance, can reduce the resistance of electron conduction, reduce the inside heat that produces because of the resistance of electric core to can control electric core better and generate heat, improve electric core operation security and stability.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
fig. 1 is a schematic structural view of a current collector of example 1 of the present invention;
FIG. 2 is a schematic structural view of an electrode region having tab portions on two long sides thereof;
fig. 3 is a schematic structural diagram of a cell in embodiment 2 of the present invention;
FIG. 4 isbase:Sub>A sectional view A-A of FIG. 3;
fig. 5 is a schematic structural view when the first tab and the second tab are located on the same side;
fig. 6 is a schematic structural diagram of a laminated cell in embodiment 3 of the present invention;
FIG. 7 is a cross-sectional view B-B of FIG. 6;
fig. 8 is a schematic structural diagram of a laminated cell in accordance with embodiment 4 of the present invention;
FIG. 9 is a cross-sectional view C-C of FIG. 8;
fig. 10 is a schematic structural view of a laminated cell embodiment 5 of the present invention;
FIG. 11 is a left side view of FIG. 10;
FIG. 12 is a cross-sectional view D-D of FIG. 11;
fig. 13 is a schematic structural view when the first cell unit includes a plurality of cell devices;
fig. 14 is a schematic structural diagram of a laminated cell in accordance with embodiment 6 of the present invention;
FIG. 15 is a left side view of FIG. 14;
FIG. 16 is a cross-sectional view E-E of FIG. 15;
fig. 17 is a schematic structural diagram of a cell unit in embodiment 7 of the present invention;
fig. 18 is a schematic view of a cell tab when disposed on a side of a cell;
fig. 19 is a schematic structural view of an energy storage device in accordance with embodiment 8 of the present invention;
FIG. 20 is a schematic view of a structure of the case in which a middle positioning plate is provided;
FIG. 21 is a schematic view showing a structure in which a partition is provided in a case.
Detailed Description
The present invention is further described below in conjunction with the drawings and the embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1, it is a schematic structural view of a current collector embodiment 1 of the present invention. The current collector of this embodiment, including the current collector body, be equipped with electrode zone 11 and utmost point ear district 12 on the current collector body, electrode zone 11 is square and has long L 0 And width W 0 And L is 0 ＞W O . The tab area 12 of the present embodiment includes one or at least two tab partitions 13 arranged at intervals, and the tab partition 13 are arranged at an edge length L of the electrode area 11 0 On the edge of (a).
Further, the tab partitions 13 are all arranged on one of the electrode regions 11, and the side length of one of the electrode regions is L 0 As shown in fig. 1; or the lug sub-regions 13 are respectively arranged on two sides of the electrode region 11 with the length L 0 As shown in fig. 2. And when the electrode lugs are arranged on the electrode area in a partitioning manner, the two side lengths of the electrode lugs are L 0 On the side of (a), the length of all tab sections 13 on a side parallel to the electrode area is L 0 Has a gap between the projections on the straight line of the sides. Preferably, all tab portions 13 have a length L parallel to the electrode area 0 In the projection on the straight line of the side (b), the gaps between two adjacent projections are equal.
Further, in some embodiments, the length of the edge of the electrode region 11 may be W 0 At least one tab partition 13 is arranged on the edge of the battery at intervals, and the description is not repeated.
In the current collector of the embodiment, the tab partition is arranged on the long edge of the electrode area, and the length of the long edge of the electrode area is greater than the length of the wide edge of the electrode area, so that electrons can be conducted towards the tab partition closest to the current collector in the current collector body, and the conduction distance of the electrons in the current collector body can be reduced; similarly, the length of the electrode area can be set according to different use scenes without limitation, and only the lug partitions are arranged on the long edges of the electrode area according to the set spacing distance; through reducing electron conduction distance, can reduce the resistance of electron conduction, reduce the inside heat that produces because of the resistance of electric core to can control electric core better and generate heat, improve electric core operation security and stability.
Example 2
Fig. 3 is a schematic structural diagram of a cell in embodiment 2 of the present invention. The battery cell of this embodiment includes a first current collector 21 and a second current collector 22, where a first electrode material layer 23 is disposed on the first current collector 21, and a second electrode material layer 24 is disposed on the second current collector 22; a solid electrolyte layer (not shown in the figure) is disposed between the first electrode material layer 23 and the second electrode material layer 24, or a separator and an electrolyte (not shown in the figure) are disposed between the first electrode material layer 23 and the second electrode material layer 24, that is, the battery cell of the embodiment may be a solid battery cell or a liquid battery cell, which will not be described in detail.
The current collectors described in embodiment 1 are used for both the first current collector 21 and the second current collector 22 of this embodiment. The electrode area and the electrode lug area arranged on the first current collector 21 are respectively a first electrode area and a first electrode lug area; the electrode region and the polar ear region arranged on the second current collector 22 are a second electrode region and a second polar ear region respectively; a first electrode material layer 23 is disposed on the first electrode region, and a second electrode material layer 24 is disposed on the second electrode region; the tab section of the first tab region forms a first tab 25 and the tab section of the second tab region forms a second tab 26.
Further, in the direction perpendicular to the view direction of the first current collector 21, the electrode areas of the first current collector 21 and the second current collector 22 are overlapped, the first tab 25 and the second tab 26 are disposed on the same side of the electrode area, and at this time, the first tab 25 and the second tab 26 are disposed in a staggered manner, as shown in fig. 5; or the first tab 25 and the second tab 26 are respectively disposed at both sides of the electrode region, as shown in fig. 3. The first tab 25 and the second tab 26 of the present embodiment are respectively disposed at both sides of the electrode region, so that the uniformity of the electrochemical reaction between the first electrode material layer 23 and the second electrode material layer 24 can be improved.
Example 3
Fig. 6 is a schematic structural diagram of a laminated cell in embodiment 3 of the present invention. The laminated cell of the embodiment includes at least two cells as described in embodiment 3, and the first current collectors 21 or the second current collectors 22 of two adjacent cells are laminated together; all the first current collectors 21 are correspondingly provided with one or at least two first tabs 25, and the correspondingly provided first tabs 25 are connected together, and the first current collectors 21 of the embodiment are correspondingly provided with three first tabs 25. All the second current collectors 22 are correspondingly provided with one or at least two second tabs 26, and the correspondingly provided second tabs 26 are connected together, and the second current collectors 22 of the embodiment are correspondingly provided with three second tabs 26. That is, in the laminated battery cell of the present embodiment, all the battery cells are connected in parallel.
Further, in a direction perpendicular to the view of the first current collector 21, all the first electrode regions and the second electrode regions coincide; the first electrode lugs 25 correspondingly arranged are partially or completely overlapped, and the second electrode lugs 26 correspondingly arranged are partially or completely overlapped, so that the first electrode lugs 25 correspondingly arranged on the first current collectors 21 can be conveniently connected together, and the second electrode lugs 26 correspondingly arranged on the second current collectors 22 can be conveniently connected together. In this embodiment, the first tabs 25 correspondingly disposed are welded together, and the second tabs 26 correspondingly disposed are welded together.
Further, in some embodiments, when the first electrode region and the second electrode region are simultaneously provided with the first tab 25 and the second tab 26 at the same side, a gap is provided between the first tab 25 and the second tab 26 provided at the side to prevent a short circuit between the first tab 25 and the second tab 26. Specifically, the first tab 25 and the second tab 26 disposed on the same side of the first electrode region and the second electrode region are alternately disposed.
Example 4
Fig. 8 is a schematic structural diagram of a laminated cell in embodiment 4 of the present invention. The laminated battery cell of the embodiment includes at least three first laminated current collectors arranged at intervals, and third electrode material layers 31 or fourth electrode material layers 32 are arranged on two side surfaces of the first laminated current collectors; a third electrode material layer 31 and a fourth electrode material layer 32 are respectively arranged on the opposite side surfaces of two adjacent first laminated current collectors; a solid electrolyte layer (not shown) is provided between the third electrode material layer 31 and the fourth electrode material layer 32, or a separator and an electrolytic solution (not shown) are provided between the third electrode material layer 31 and the fourth electrode material layer 32. That is, the laminated cell in this embodiment may be a solid laminated cell, and may also be a liquid laminated cell.
All the first laminated current collectors used the current collector described in example 1. Let the first laminated current collector provided with the third electrode material layer 31 be the third current collector 33, and the first laminated current collector provided with the fourth electrode material layer 32 be the fourth current collector 34. The third electrode material layer 31 is arranged on an electrode region of the third current collector 33, and the fourth electrode material layer 32 is arranged on an electrode region of the fourth current collector 34; the tab partition of the third current collector 33 forms a third tab 35, and the tab partition of the fourth current collector 34 forms a fourth tab 36.
All third mass flow bodies 33 are correspondingly provided with one or at least two third tabs 35, and the correspondingly arranged third tabs 35 are connected together, and the third mass flow bodies 33 of the embodiment are correspondingly provided with two third tabs 35. All the fourth current collectors 34 are correspondingly provided with one or at least two fourth tabs 36, and the correspondingly provided fourth tabs 36 are connected together, and the fourth current collectors 34 of the present embodiment are correspondingly provided with two fourth tabs 36. Specifically, in the present embodiment, the third lugs 35 and the fourth lugs 36 are welded together.
Further, in the direction perpendicular to the view of the third current collector 33, the electrode regions of all the third current collectors 33 and the fourth current collectors 34 coincide; the third electrode 35 that corresponds the setting partially coincides or completely coincides between, and the fourth electrode 36 that corresponds the setting partially coincides or completely coincides between to can conveniently link together the first electrode 35 that corresponds the setting on each third mass collector 33, in the same way, can conveniently link together the fourth electrode 36 that corresponds the setting on each fourth mass collector 34. In this embodiment, the third lugs 35 and the fourth lugs 36 are welded together.
Further, in some embodiments, when the third electrode regions and the fourth electrode regions are provided with the third electrode tabs 35 and the fourth electrode tabs 36 on the same side, there is a gap between the third electrode tabs 35 and the fourth electrode tabs 36, and the third electrode tabs 35 and the fourth electrode tabs 36 arranged on the same side of the third electrode regions and the fourth electrode regions are alternately arranged.
Example 5
Fig. 10 is a schematic structural diagram of a laminated cell in embodiment 5 of the present invention. The laminated battery cell of the embodiment includes at least two first battery cell units 40 laminated together, and an insulating isolation layer 41 is disposed between two adjacent first battery cell units 40.
The first cell unit 40 includes at least one cell device, and the cell device includes a fifth current collector 42 and a sixth current collector 43, a fifth electrode material layer 44 is disposed on the fifth current collector 42, a sixth electrode material layer 45 is disposed on the sixth current collector 43, a solid electrolyte layer (not shown in the figure) is disposed between the fifth electrode material layer 44 and the sixth electrode material layer 45, or a separator and an electrolyte (not shown in the figure) are disposed between the fifth electrode material layer 44 and the sixth electrode material layer 45.
The current collectors described in example 1 were used for the fifth current collector and the sixth current collector. The fifth electrode material layer 44 is disposed on the electrode region of the fifth current collector 42, and the sixth electrode material layer 45 is disposed on the electrode region of the sixth current collector 43; the tab region of the fifth current collector 42 forms a fifth tab 46 and the tab region of the sixth current collector 43 forms a sixth tab 47.
The first cell unit 40 includes one cell device or at least two cell devices. When the first cell unit 40 includes at least two cell devices, the fifth current collectors 42 or the sixth current collectors 43 of two adjacent cell devices are stacked together. One or at least two fifth tabs 46 are correspondingly disposed on all the fifth current collectors 42 in the first cell unit 40, and the correspondingly disposed fifth tabs 46 are connected together, and three fifth tabs 46 are correspondingly disposed on the fifth current collectors 42 in this embodiment. One or at least two sixth tabs 47 are correspondingly disposed on all the sixth current collectors 43 in the first cell unit 40, and the correspondingly disposed sixth tabs 47 are connected together, and three sixth tabs 47 are correspondingly disposed on the sixth current collectors 43 in this embodiment. I.e., the cell devices belonging to the same first cell unit 40 are connected in parallel.
In two adjacent first cell units 40, the fifth tab 46 of one of the first cell units 40 and the sixth tab 47 of the other first cell unit 40 are connected together. I.e., the first cell units 40.
Further, in the direction of the view perpendicular to the fifth current collectors 42, the electrode regions of all the fifth current collectors 42 and the sixth current collectors 43 coincide; in the same first cell unit 40, the correspondingly arranged fifth tabs 46 are partially or completely overlapped, and the correspondingly arranged sixth tabs 47 are partially or completely overlapped. Therefore, the fifth tabs 46 correspondingly disposed on the fifth current collectors 42 can be conveniently connected together, and similarly, the sixth tabs 47 correspondingly disposed on the sixth current collectors 43 can be conveniently connected together. In this embodiment, the correspondingly arranged fifth tabs 46 are welded, and the correspondingly arranged sixth tabs 47 are welded.
Further, in some embodiments, in the same first cell unit 40, when the fifth electrode region and the sixth electrode region are provided on the same side of the fifth electrode region and the sixth electrode region, a gap is formed between the fifth electrode tab 46 and the sixth electrode tab 47, so as to prevent a short circuit between the fifth electrode tab 46 and the sixth electrode tab 47. And the fifth electrode lugs and the sixth electrode lugs arranged on the same side of the fifth electrode zone and the sixth electrode zone are arranged in a staggered manner.
Further, in two adjacent first cell units 40, the fifth tab 46 of one of the first cell units 40 and the sixth tab 47 of the other first cell unit 40 are welded and connected. In two adjacent first cell units 40 of the present embodiment, the fifth tab 46 of one first cell unit 40 is arranged corresponding to the sixth tab 47 of the other second cell unit 40; in the view direction perpendicular to the fifth current collector 42, the fifth tabs 46 and the sixth tabs 47 correspondingly disposed in two adjacent first cell units 40 partially or completely overlap with each other, so that the welding connection is facilitated, and the series connection between the first cell units 40 is realized.
Example 6
Fig. 14 is a schematic structural diagram of a laminated cell in embodiment 6 of the present invention. The laminated battery cell of the embodiment includes at least two second battery cell units 50 laminated together, and an insulating isolation layer 51 is disposed between two adjacent second battery cell units 50.
The second battery cell unit 50 comprises at least three second laminated current collectors arranged at intervals, and seventh electrode material layers 52 or eighth electrode material layers 53 are arranged on two side surfaces of each second laminated current collector; a seventh electrode material layer 52 and an eighth electrode material layer 53 are respectively arranged on the opposite side surfaces of two adjacent second laminated current collectors; a solid electrolyte layer (not shown) is provided between the seventh electrode material layer 52 and the eighth electrode material layer 53, or a separator and an electrolyte (not shown) are provided between the seventh electrode material layer 52 and the eighth electrode material layer 53.
All of the second stacked current collectors used the current collector described in example 1. Let the second laminated current collector provided with the seventh electrode material layer 52 be a seventh current collector 54, and the second laminated current collector provided with the eighth electrode material layer 53 be an eighth current collector 55. The seventh electrode material layer 52 is disposed on an electrode region of the seventh current collector 54, and the eighth electrode material layer 53 is disposed on an electrode region of the eighth current collector 55; the tab partition of the seventh current collector 54 forms a seventh tab 56, and the tab partition of the eighth current collector 55 forms an eighth tab 57.
One or at least two seventh tabs 56 are correspondingly disposed on all the seventh current collectors 54 in the second battery cell unit 50, and the correspondingly disposed seventh tabs 56 are connected together, and two seventh tabs 56 are correspondingly disposed on the seventh current collectors 54 in this embodiment. One or at least two eighth tabs 57 are correspondingly arranged on all the eighth current collectors 55 in the second cell unit, the correspondingly arranged eighth tabs 57 are connected together, and two eighth tabs 57 are correspondingly arranged on the eighth current collectors 55 in this embodiment. In two adjacent second cell units 50, the seventh tab 56 of one of the second cell units 50 and the eighth tab 57 of the other second cell unit 50 are connected together.
Further, in the direction of the view perpendicular to the seventh current collectors 54, the electrode regions of all the seventh current collectors 54 and eighth current collectors 55 coincide; in the same second battery cell unit 50, the seventh tabs 56 that are correspondingly arranged partially overlap or completely overlap, and the eighth tabs 57 that are correspondingly arranged partially overlap or completely overlap. Therefore, the seventh tabs 56 correspondingly disposed on the seventh current collectors 54 can be conveniently connected together, and similarly, the eighth tabs 57 correspondingly disposed on the eighth current collectors 55 can be conveniently connected together. In this embodiment, the seventh tabs 56 are welded to each other, and the eighth tabs 57 are welded to each other. That is, the second cell unit 50 of the present embodiment is connected in parallel.
Further, in the same second cell unit 40, when the seventh tab 56 and the eighth tab 57 are simultaneously disposed on the same side of the seventh electrode region and the eighth electrode region, a gap is formed between the seventh tab 56 and the eighth tab 57, so as to prevent short circuit between the seventh tab 56 and the eighth tab 57, and at this time, the seventh tab and the eighth tab disposed on the same side of the seventh electrode region and the eighth electrode region may be disposed in a staggered manner.
Further, in two adjacent second cell units 50, the seventh tab 56 of one of the second cell units 50 and the eighth tab 57 of the other second cell unit 50 are welded and connected. In two adjacent second battery cell units 50, the seventh tab 56 of one second battery cell unit 50 is arranged corresponding to the eighth tab 57 of the other second battery cell unit 50; the parts of the seventh and eighth tabs 56 and 57 correspondingly disposed in two adjacent second cell units 50 are partially or completely overlapped in the view direction perpendicular to the seventh current collector, so as to facilitate the connection of the seventh and eighth tabs 56 and 57 of two adjacent second cell units 50 together, even if the two adjacent second cell units 50 are connected in series.
Example 7
Fig. 17 is a schematic structural diagram of a cell unit in example 7 of the present invention. The battery cell unit of the present embodiment includes a single casing 60, and a laminated battery cell 61 is disposed in the single casing 60, where the laminated battery cell 61 may be the laminated battery cell described in embodiment 3, embodiment 4, embodiment 5, or embodiment 6.
Further, the single body housing 60 is rectangular and has long sides, wide sides and thick sides, the long sides of the single body housing 60 are parallel to the long sides of the electrode regions, and the wide sides of the single body housing 60 are parallel to the wide sides of the electrode regions; the side surface having the long side and the thick side of the single body case 60 is the single body side surface 62. The laminated cell of the present embodiment is a liquid laminated cell, and a separator 69 and an electrolyte are provided between electrode materials. The side surface of the single body is provided with a liquid injection port 63 for injecting electrolyte. Specifically, the cell casing 60 has two cell side surfaces 62, and the two cell side surfaces of the cell casing of this embodiment are respectively provided with the liquid injection port 63, so that the width of the laminated battery cell 61 can be made wider and the requirement of liquid injection can be met. Specifically, when the length of the laminated battery core 61 is long, at least two liquid injection ports 63 may be respectively disposed on the cell side surfaces 62 at intervals, and the number of the liquid injection ports 63 disposed on each cell side surface 62 is set according to the actual liquid injection requirement, which is not described in detail. The single body housing 60 of this embodiment is also provided with an explosion-proof valve 68.
Further, the side surfaces with the side length being the wide side and the thick side of the single shell are made to be the single end surface 67, the single shell 60 is provided with single tabs, and the single tabs are arranged on the single side surface 62 and/or the single end surface 67. Specifically, the cell tabs include a first cell tab 65 and a second cell tab 66, and the first cell tab 65 and the second cell tab 66 may be disposed on the same cell side surface 62 or the cell end surface 67. As shown in fig. 18, a first cell tab 65 and a second cell tab 66 are respectively provided on both cell side faces 62; as shown in fig. 17, a first cell tab 65 and a second cell tab 66 are provided on both cell end faces 67, respectively. Specifically, when the first cell tab 65 and the second cell tab 66 are disposed on the cell side surface 62, at least one first cell tab 65 or one second cell tab 66 is disposed on the cell side surface 62 at intervals, and the number of the first cell tab 65 and the second cell tab 66 is set according to the length of the laminated battery cell 61, so as to reduce the resistance of the electron conduction to below a set threshold value.
When the laminated battery cell 61 in this embodiment is the laminated battery cell described in embodiment 3, the first cell tabs 65 and the first tabs 25 are arranged in a one-to-one correspondence, the second cell tabs 66 and the second tabs 26 are arranged in a one-to-one correspondence, and the first cell tabs 65 and the second cell tabs 66 are arranged on the side surfaces of the cells.
When the laminated battery cell 61 in this embodiment is the laminated battery cell described in embodiment 4, the first cell tabs 65 and the third cell tabs 35 may be arranged in a one-to-one correspondence manner, the second cell tabs 66 and the fourth cell tabs 36 may be arranged in a one-to-one correspondence manner, and the first cell tabs 65 and the second cell tabs 66 are arranged on the side surfaces of the cells.
When the laminated battery cell 61 of the present embodiment is the laminated battery cell described in embodiment 5, the first cell tab 65 and the fifth cell tab 46 may be disposed in a one-to-one correspondence manner, the second cell tab 66 and the sixth cell tab 47 may be disposed in a one-to-one correspondence manner, and the first cell tab 65 and the second cell tab 66 are disposed on the cell side surface.
When the laminated battery cell 61 of the present embodiment is the laminated battery cell as described in embodiment 6, the first cell tab 65 and the seventh cell tab 56 may be disposed in a one-to-one correspondence manner, the second cell tab 66 and the eighth cell tab 57 may be disposed in a one-to-one correspondence manner, and the first cell tab 65 and the second cell tab 66 are disposed on the cell side surface.
Example 8
Fig. 19 is a schematic structural diagram of an energy storage device in accordance with embodiment 8 of the present invention. The energy storage device of this embodiment includes a case 70, and at least one battery cell unit 71 as described in embodiment 7 is disposed in the case 70.
Further, the case 70 has a rectangular parallelepiped shape, and has a length L, a width W, and a height H; the cell unit 71 is rectangular, and has a length L ', a width W ', and a thickness T '; if two side surfaces of the box 70 with the length of the side being the length L and the height H are mounting surfaces, the width W of the box 70 and the length L' of the cell unit 71 satisfy:
L＝L’+δ 1 or L =2L' + δ 2
Wherein, delta 1 And delta 2 Respectively, the thickness occupied by other accessory structures in the tank width direction.
That is, the length of the cell unit 71 is about the width of the casing 70 or about half of the width of the casing 70. Specifically, as shown in fig. 19, when the length of the battery cell 71 is about the width of the box body 70, one of the two installation surfaces of the box body 70 is an openable operation surface, the other installation surface is a positioning surface, a single cell plugging structure for plugging the battery cell is arranged on the positioning surface, and the battery cell is plugged in the single cell plugging structure through the operation surface array. As shown in fig. 20, when the length of the battery cell unit 71 is approximately equal to half of the width of the box 70, a middle positioning plate 72 parallel to the mounting surface is arranged in the box 70, both side surfaces of the middle positioning plate 72 are positioning surfaces, a single unit plugging structure for plugging the battery cell unit is arranged on the positioning surfaces, both mounting surfaces of the box 70 are openable operation surfaces, and the battery cell unit is plugged and mounted on the single unit plugging structure through two operation surface arrays. In the energy storage device of this embodiment, the plugging installation of the cell units 71 can be realized through the operation surface and the positioning surface, so that not only is the installation more convenient, but also the maintenance of each cell unit 71 can be directly carried out outside the box body, and different from the additional facilities for setting the maintenance channel inside the box body 70, the space utilization rate inside the box body 70 can be effectively improved, and the energy storage capacity is improved. Preferably, a stabilizing device 73 for stabilizing the cell units is arranged in the box body 70.
As shown in fig. 21, the structure inside the case 70 may be: partition plates 75 are arranged between the two installation surfaces of the box body 70 at intervals, a plurality of installation grooves are formed in the box body 70, and a plurality of battery cell monomers 71 form a monomer cluster 74 and are installed in the installation grooves; the single body shell 60 is provided with a single body pole lug, and when the single body pole lug is arranged on the side surface 62 of the single body, the side surface of the mounting groove in the length direction of the box body is provided with a first pole lug matching structure matched with the single body pole lug; when the single tab is arranged on the single end face 67, the two ends of the mounting groove in the width direction of the box body 70 are provided with second tab matching structures matched with the single tabs.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change of the technical field of the invention is within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims (40)

1. A current collector, characterized by: the current collector comprises a current collector body, wherein an electrode area and a tab area are arranged on the current collector body, the electrode area is square and has a long L shape 0 And width W 0 And L is 0 ＞W O ；
The electrode lug area comprises one or at least two electrode lug subareas arranged at intervals, and the side length of the electrode lug subareas is L 0 On the edge of (a).
2. The current collector of claim 1, wherein: the electrode lugs are all arranged in the electrode area in a partition mode, wherein one side length of one electrode lug is L 0 The edge of (a); or the lug is respectively arranged on the two side lengths of the electrode area in a partitioning manner and is L 0 On the edge of (a).
3. The current collector of claim 2, wherein: when the lug is partitioned and arranged on two side lengths of the electrode area respectively, the two side lengths are L 0 When the side of the electrode is divided into two parts, the length of the side of all the lug subareas parallel to the electrode area is L 0 Has a gap between the projections on the straight line of the sides.
4. The current collector of claim 1, wherein: the side length of the electrode area is W 0 The edge of the battery is provided with at least one lug partition at intervals.
5. An electric core, its characterized in that: the current collector comprises a first current collector and a second current collector, wherein a first electrode material layer is arranged on the first current collector, and a second electrode material layer is arranged on the second current collector; a solid electrolyte layer is arranged between the first electrode material layer and the second electrode material layer, or a diaphragm and electrolyte are arranged between the first electrode material layer and the second electrode material layer;
the current collectors as in any one of claims 1-4 are adopted for the first current collector and the second current collector; enabling an electrode area and an electrode lug area arranged on the first current collector to be a first electrode area and a first electrode lug area respectively; the electrode area and the polar ear area which are arranged on the second current collector are respectively a second electrode area and a second polar ear area; the first electrode material layer is arranged on the first electrode region, and the second electrode material layer is arranged on the second electrode region; the first pole ear area is formed into a first pole ear in a pole ear partition mode, and the second pole ear area is formed into a second pole ear in a pole ear partition mode.
6. The cell of claim 5, wherein: in a view direction perpendicular to the first current collector, electrode regions of the first current collector and the second current collector are overlapped, the first electrode lug and the second electrode lug are arranged on the same side of the electrode regions, or the first electrode lug and the second electrode lug are respectively arranged on two sides of the electrode regions.
7. A laminated cell, comprising: comprising at least two cells of claim 5 or 6, the first or second current collectors of adjacent two of the cells being stacked together; one or at least two first tabs are correspondingly arranged on all the first current collectors, and the correspondingly arranged first tabs are connected together; all the second current collectors are correspondingly provided with one or at least two second pole ears, and the correspondingly arranged second pole ears are connected together.
8. The laminated cell of claim 7, wherein: in a view direction perpendicular to the first current collector, all the first electrode regions and the second electrode regions coincide; the first pole lugs which are correspondingly arranged are partially or completely overlapped, and the second pole lugs which are correspondingly arranged are partially or completely overlapped.
9. The laminated cell of claim 8, wherein: when the same side of the first electrode region and the second electrode region is simultaneously provided with the first lug and the second lug, a gap is formed between the first lug and the second lug which are arranged on the same side.
10. The laminated cell of claim 9, wherein: the first electrode regions and the second electrode regions are arranged on the same side of the first electrode regions and the second electrode regions in a staggered mode.
11. The laminated cell of claim 7, wherein: the first pole lugs are correspondingly connected in a welding mode, and the second pole lugs are correspondingly connected in a welding mode.
12. A laminated cell, characterized in that: the current collector comprises at least three first laminated current collectors arranged at intervals, wherein third electrode material layers or fourth electrode material layers are arranged on the side surfaces of two sides of each first laminated current collector; the third electrode material layer and the fourth electrode material layer are respectively arranged on the opposite side surfaces of the two adjacent first laminated current collectors; a solid electrolyte layer is arranged between the third electrode material layer and the fourth electrode material layer, or a diaphragm and electrolyte are arranged between the third electrode material layer and the fourth electrode material layer;
all of said first laminated current collectors employ a current collector according to any one of claims 1 to 4; the first laminated current collector provided with the third electrode material layer is a third current collector, and the first laminated current collector provided with the fourth electrode material layer is a fourth current collector;
the third electrode material layer is arranged on the electrode area of the third current collector, and the fourth electrode material layer is arranged on the electrode area of the fourth current collector; the lug partition of the third current collector forms a third lug, and the lug partition of the fourth current collector forms a fourth lug;
one or at least two third lugs are correspondingly arranged on all the third current collectors, and the correspondingly arranged third lugs are connected together; all the fourth current collectors are correspondingly provided with one or at least two fourth lugs, and the fourth lugs are correspondingly connected together.
13. The laminated cell of claim 12, wherein: in a view direction perpendicular to the third current collector, the electrode regions of all the third current collector and the fourth current collector are overlapped; the third pole ears which are correspondingly arranged are partially or completely overlapped, and the fourth pole ears which are correspondingly arranged are partially or completely overlapped.
14. The laminated cell of claim 13, wherein: when the same side of the third electrode region and the fourth electrode region is simultaneously provided with the third lug and the fourth lug, a gap is formed between the third lug and the fourth lug.
15. The laminated cell of claim 14, wherein: the third electrode regions and the fourth electrode regions are arranged on the same side of the third electrode regions and the fourth electrode regions in a staggered mode.
16. The laminated cell of claim 7, wherein: the third lugs are correspondingly connected in a welding mode, and the fourth lugs are correspondingly connected in a welding mode.
17. A laminated cell, comprising: the battery comprises at least two first battery cell units which are laminated together, wherein an insulating isolation layer is arranged between every two adjacent first battery cell units;
the first cell unit comprises at least one cell device, the cell device comprises a fifth current collector and a sixth current collector, a fifth electrode material layer is arranged on the fifth current collector, a sixth electrode material layer is arranged on the sixth current collector, a solid electrolyte layer is arranged between the fifth electrode material layer and the sixth electrode material layer, or a diaphragm and electrolyte are arranged between the fifth electrode material layer and the sixth electrode material layer;
the current collectors as claimed in any one of claims 1 to 4 are adopted for the fifth current collector and the sixth current collector; the fifth electrode material layer is arranged on an electrode area of the fifth current collector, and the sixth electrode material layer is arranged on an electrode area of the sixth current collector; the lug partition of the fifth current collector forms a fifth lug, and the lug partition of the sixth current collector forms a sixth lug;
the first cell unit comprises one cell device or at least two cell devices, and when the first cell unit comprises at least two cell devices, fifth current collectors or sixth current collectors of two adjacent cell devices are stacked together; one or at least two fifth tabs are correspondingly arranged on all the fifth current collectors in the first battery cell unit, and the correspondingly arranged fifth tabs are connected together; one or at least two sixth pole lugs are correspondingly arranged on all the sixth current collectors in the first battery cell unit, and the correspondingly arranged sixth pole lugs are connected together;
and in two adjacent first cell units, the fifth tab of one of the first cell units and the sixth tab of the other first cell unit are connected together.
18. The laminated cell of claim 17, wherein: in a view direction perpendicular to the fifth current collector, the electrode regions of all the fifth and sixth current collectors coincide; in the same first cell unit, the correspondingly arranged fifth tabs are partially or completely overlapped, and the correspondingly arranged sixth tabs are partially or completely overlapped.
19. The laminated cell of claim 18, wherein: in the same first cell unit, when the fifth electrode region and the sixth electrode region are arranged on the same side of the fifth electrode region and the sixth electrode region, a gap is formed between the fifth electrode tab and the sixth electrode tab.
20. The laminated cell of claim 19, wherein: the fifth electrode lugs and the sixth electrode lugs are arranged on the same side of the fifth electrode zone and the sixth electrode zone in a staggered mode.
21. The laminated cell of claim 17, wherein: all the fifth tabs in the first battery cell unit are connected in a welding mode; all the sixth pole lugs in the first battery cell unit are connected in a welding mode; in two adjacent first cell units, the fifth tab of one of the first cell units is welded to the sixth tab of the other first cell unit.
22. The laminated cell of claim 17, wherein: in two adjacent first cell units, a fifth tab of one of the first cell units is arranged corresponding to a sixth tab of the other second cell unit; in a view direction perpendicular to the fifth current collector, a fifth tab and a sixth tab, which are correspondingly disposed in two adjacent first cell units, are partially or completely overlapped.
23. A laminated cell, characterized in that: the battery comprises at least two second battery cell units which are laminated together, wherein an insulating isolation layer is arranged between every two adjacent second battery cell units;
the second battery cell unit comprises at least three second laminated current collectors arranged at intervals, and a seventh electrode material layer or an eighth electrode material layer is arranged on the side surfaces of two sides of each second laminated current collector; the seventh electrode material layer and the eighth electrode material layer are respectively arranged on the opposite side surfaces of the two adjacent second laminated current collectors; a solid electrolyte layer is arranged between the seventh electrode material layer and the eighth electrode material layer, or a diaphragm and electrolyte are arranged between the seventh electrode material layer and the eighth electrode material layer;
all of said second laminated current collectors employ a current collector according to any one of claims 1 to 4; the second laminated current collector provided with the seventh electrode material layer is a seventh current collector, and the second laminated current collector provided with the eighth electrode material layer is an eighth current collector; the seventh electrode material layer is arranged on an electrode region of the seventh current collector, and the eighth electrode material layer is arranged on an electrode region of the eighth current collector; a seventh tab is formed in the tab partition of the seventh current collector, and an eighth tab is formed in the tab partition of the eighth current collector;
one or at least two seventh tabs are correspondingly arranged on all the seventh current collectors in the second battery cell unit, and the correspondingly arranged seventh tabs are connected together; one or at least two eighth pole lugs are correspondingly arranged on all the eighth current collectors in the second battery cell unit, and the correspondingly arranged eighth pole lugs are connected together;
and in two adjacent second cell units, the seventh tab of one of the second cell units and the eighth tab of the other second cell unit are connected together.
24. The laminated cell of claim 23, wherein: in a view direction perpendicular to the seventh current collector, the electrode regions of all the seventh and eighth current collectors are overlapped; in the same second cell unit, the seventh tabs correspondingly arranged are partially or completely overlapped, and the eighth tabs correspondingly arranged are partially or completely overlapped.
25. The laminated cell of claim 24, wherein: in the same second cell unit, when the seventh tab and the eighth tab are simultaneously arranged on the same side of the seventh electrode region and the eighth electrode region, a gap is formed between the seventh tab and the eighth tab.
26. The laminated cell of claim 26, wherein: the seventh electrode lug and the eighth electrode lug which are arranged on the same side of the seventh electrode zone and the eighth electrode zone are arranged in a staggered mode.
27. The laminated cell of claim 23, wherein: all the seventh tabs in the second battery cell unit are connected in a welding mode; all the eighth pole lugs in the second battery cell unit are connected in a welding mode; and in two adjacent second cell units, the seventh tab of one of the second cell units is welded and connected with the eighth tab of the other second cell unit.
28. The laminated cell of claim 23, wherein: in two adjacent second cell units, a seventh tab of one of the second cell units is arranged corresponding to an eighth tab of the other second cell unit; in a view direction perpendicular to the seventh current collector, the seventh tab and the eighth tab correspondingly disposed in two adjacent second cell units partially or completely overlap.
29. A battery cell monomer is characterized in that: comprising a cell casing having a laminated cell according to any of claims 7-28 disposed therein.
30. The cell monomer of claim 29, wherein: the single body shell is rectangular and is provided with a long edge, a wide edge and a thick edge, the long edge of the single body shell is parallel to the long edge of the electrode area, and the wide edge of the single body shell is parallel to the wide edge of the electrode area; the side surfaces with the side length being the long side and the thick side of the monomer shell are monomer side surfaces, the monomer side surfaces are provided with liquid injection ports for injecting electrolyte, and the pole ear regions are provided with through holes for circulating the electrolyte.
31. The cell monomer of claim 30, wherein: and the two monomer side surfaces of the monomer shell are respectively provided with the liquid injection port.
32. The cell monomer of claim 31, wherein: at least two liquid injection ports are respectively arranged on the side surfaces of the single bodies at intervals.
33. The cell monomer of claim 29, wherein: the side surfaces with the side length of the wide edge and the thick edge of the monomer shell are monomer end surfaces, monomer lugs are arranged on the monomer shell, and the monomer lugs are arranged on the monomer side surfaces and/or the monomer end surfaces.
34. The cell monomer of claim 33, wherein: the single pole lug comprises a first single pole lug and a second single pole lug, wherein the first single pole lug and the second single pole lug are respectively arranged on the side surface of the single pole, or the first single pole lug and the second single pole lug are respectively arranged on the end surface of the single pole.
35. The cell body of claim 34, wherein: and at least one first monomer lug or second monomer lug is arranged on the side surface of each monomer at intervals.
36. An energy storage device, characterized by: comprising a case in which at least one cell unit according to any one of claims 29 to 35 is disposed.
37. The energy storage device of claim 36, wherein: the box body is cuboid and has a length L, a width W and a height H; the single body is cuboid and has a length L ', a width W ' and a thickness T '; two side surfaces with the side length of L and the height of H in the box body are taken as mounting surfaces, so that the width W of the box body and the length L' of the single body meet the following requirements:
L＝L’+δ 1 or L =2L' + δ 2
Wherein, delta 1 And delta 2 Respectively, the thickness of other ancillary structures in the case taken up in the case width direction.
38. The energy storage device of claim 37, wherein: one of the two installation surfaces of the box body is an openable operation surface, the other installation surface is a positioning surface, a single body inserting structure for inserting the energy storage single body is arranged on the positioning surface, and the energy storage single body is inserted in the single body inserting structure through the operation surface array; or the like, or, alternatively,
the energy storage device is characterized in that a middle positioning plate parallel to the mounting surface is arranged in the box body, the side surfaces of two sides of the middle positioning plate are positioning surfaces, the positioning surfaces are provided with single body inserting structures for inserting the energy storage monomers, the mounting surfaces of the box body are openable operation surfaces, and the energy storage monomers are inserted and mounted on the single body inserting structures through the operation surface arrays.
39. The energy storage device of claim 38, wherein: and a stabilizing device for stabilizing the energy storage monomer is arranged in the box body.
40. The energy storage device of claim 37, wherein: partition plates are arranged between the two installation surfaces of the box body at intervals, a plurality of installation grooves are formed in the box body, and a plurality of battery cell monomers form a monomer cluster and are installed in the installation grooves; a single lug is arranged on the single shell, and a first lug matching structure matched with the single lug is arranged on the side surface of the mounting groove in the length direction of the box body when the single lug is arranged on the side surface of the single shell; monomer utmost point ear sets up when on the monomer terminal surface, the mounting groove is located box width direction ascending both ends be equipped with monomer utmost point ear complex second utmost point ear cooperation structure.
CN202111074499.7A 2021-09-14 2021-09-14 Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device Pending CN115810758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111074499.7A CN115810758A (en) 2021-09-14 2021-09-14 Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111074499.7A CN115810758A (en) 2021-09-14 2021-09-14 Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device

Publications (1)

Publication Number Publication Date
CN115810758A true CN115810758A (en) 2023-03-17

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CN202111074499.7A Pending CN115810758A (en) 2021-09-14 2021-09-14 Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device

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Country Link
CN (1) CN115810758A (en)

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