CN215869468U - 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
CN215869468U
CN215869468U CN202122225867.5U CN202122225867U CN215869468U CN 215869468 U CN215869468 U CN 215869468U CN 202122225867 U CN202122225867 U CN 202122225867U CN 215869468 U CN215869468 U CN 215869468U
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current collector
cell
electrode
tab
material layer
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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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    • 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 utility model discloses a current collector, an electric core, a laminated electric core, an electric core monomer and an energy storage device.A pole ear area is arranged on a long edge of an electrode area, the length of the long edge of the electrode area is greater than the length of a wide edge of the electrode area, and the maximum distance of conduction of electrons in the current collector body is the width of the electrode area, so that the distance of conduction of the electrons in the current collector body is reduced, namely the distance of conduction of the electrons cannot be increased under the condition of prolonging the length of the electrode area, and the length of the electrode area can be set according to different use scenes without limitation; 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 utility model 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 disposed at two ends 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 electron conduction path in the current collector, the heat productivity inside the battery cell due to the increase of the resistance is also 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 utility model provides the following technical scheme:
the utility model 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 L0And width W0And L is0＞WO；
The electrode lug area comprises a first electrode lug area, and the length of one of the first electrode lug area and the electrode area is L0Is formed to extend outwardly.
Furthermore, the polar ear region also comprises a second polar ear region, and the length of one of the second polar ear region and the electrode region is W0Is formed by extending outwards, and the first polar ear area is connected with the second polar ear area.
Further, the first tab area is squared and has a length L1And width W1And L is1＝L0(ii) a The second polar ear region is square and has a length L2And width W2And L is2≤W0。
Furthermore, in the electrode region, an intersection point between the edge provided with the first polar ear region and the edge provided with the second polar ear region is a vertex, and an intersection point of the corresponding first polar ear region and the corresponding second polar ear region is the vertex.
Further, L1+nL2≤L0+W0Wherein n is the number of the second pole ear regions, and n is 1 or 2.
Further, utmost point ear district still includes third utmost point ear district, third utmost point ear district is located between first utmost point ear district and the second utmost point ear district, first utmost point ear district with pass through between the second utmost point ear district third utmost point ear district links to each other.
Furthermore, the third polar ear region is provided with two mutually perpendicular and crossed right-angle sides, wherein one right-angle side and the length of the first polar ear region is W1The other right-angle side and the second polar ear region have a length of W2Are coterminous.
Furthermore, the third tab region is square, or a smooth curve is arranged between two right-angle sides of the third tab region.
The utility model 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 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 forms a first pole ear, and the second pole ear area forms a second pole ear.
Furthermore, in the view direction perpendicular to the first current collector, the first tab and the second tab are oppositely arranged, and gaps are respectively arranged between two ends of the first tab and the second tab.
Further, in a view direction perpendicular to the first current collector, the first electrode region and the second electrode region are completely overlapped, a straight line passing through a geometric center of the first electrode region or the second electrode region and intersecting with an edge with a length of W0 is a boundary line, and the first tab and the second tab are respectively located on two sides of the boundary line.
Further, the first electrode lug and the second electrode lug are arranged in a centrosymmetric mode relative to the geometric center of the first electrode region or the second electrode region.
The utility model also provides a laminated battery cell, which comprises at least two battery cells as described above, wherein the first current collectors or the second current collectors of two adjacent battery cells are laminated together, all the first tabs are connected together, and all the second tabs are connected together.
Furthermore, all the first lugs are welded and connected, and all the second lugs are welded and connected; or the like, or, alternatively,
still include first female arranging and the female row of second, all first utmost point ear passes through first female row links together, all second utmost point ear passes through female the linking together that arranges of second.
The utility model 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 third mass flow body the utmost point ear district forms the third utmost point ear, the fourth mass flow body the utmost point ear district forms the fourth utmost point ear.
Furthermore, in the view direction perpendicular to the third current collector, the third tab and the fourth tab are oppositely arranged, and gaps are respectively arranged between two ends of the third tab and the fourth tab.
Further, in the view direction perpendicular to the third current collector, electrode regions of all the current collectors are completely overlapped, so that the electrode regions pass through the geometric center of the electrode regions and have a length of W0The third tab and the fourth tab are respectively positioned at two sides of the boundary.
Further, the third electrode lug and the fourth electrode lug are arranged in a centrosymmetric mode relative to the geometric center of the electrode area.
Further, all of the third poles are connected together and all of the fourth poles are connected together.
Further, all of the third tabs are welded together, and all of the third tabs are welded together; or the like, or, alternatively,
still include the third and arrange with the fourth mother, all the third tab passes through the third is arranged and is linked together, all the fourth tab passes through the fourth is arranged and is linked together.
The utility model 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; enabling an electrode area and a tab area arranged on the fifth current collector to be a fifth electrode area and a fifth tab area respectively; the electrode area and the electrode lug area which are arranged on the sixth current collector are respectively a sixth electrode area and a sixth electrode lug area; the fifth electrode material layer is arranged on the fifth electrode region, and the sixth electrode material layer is arranged on the sixth electrode region; the fifth pole lug area forms a fifth pole lug, and the sixth pole lug area forms a sixth pole 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; all the fifth tabs in the first cell unit are connected together, and all the sixth tabs in the first cell unit 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, all the fifth tabs in the first cell unit are welded and connected, and all the sixth tabs in the first cell unit are welded and connected; 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.
Furthermore, in the view direction perpendicular to the fifth current collector, the fifth tab and the sixth tab in the same first cell unit are oppositely disposed, and gaps are respectively formed between two ends of the fifth tab and the sixth tab.
Further, in the view direction perpendicular to the fifth current collector, electrode regions of all the current collectors are completely overlapped, so that the current collectors pass through the geometric center of the electrode regions and have a length of W0The straight line of the intersecting edges is a boundary line, and the straight line is located in the same first cell unitAnd the fifth lug and the sixth lug are respectively positioned at two sides of the boundary.
Furthermore, the fifth tab and the sixth tab in the same first cell unit are arranged in a centrosymmetric manner with respect to the geometric center of the electrode region.
Further, in two adjacent first cell units, the fifth tab of one of the first cell units is arranged opposite to the sixth tab of the other first cell unit; and in a view direction perpendicular to the fifth current collector, the fifth tab of one of the two adjacent first cell units coincides with or partially coincides with the sixth tab of the other first cell unit.
The utility model also provides a laminated battery cell, which is 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 seventh electrode material layers or eighth electrode material layers are 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 disposed on the electrode region of the seventh current collector, and the eighth electrode material layer is disposed on the electrode region of the eighth current collector; the lug area of the seventh current collector forms a seventh lug, and the lug area of the eighth current collector forms an eighth lug;
all the seventh tabs belonging to the same second cell unit are connected together, and all the eighth tabs belonging to the same second cell unit 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.
Furthermore, all the seventh tabs belonging to the same second cell unit are welded and connected, and all the seventh tabs belonging to the same second cell unit are welded and connected; 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.
Furthermore, in a view direction perpendicular to the seventh current collector, the seventh tab and the eighth tab in the same second cell unit are oppositely disposed, and gaps are respectively formed between two ends of the seventh tab and the eighth tab.
Further, in the view direction perpendicular to the seventh current collector, electrode regions of all the current collectors are completely overlapped, so that the electrode regions pass through the geometric center of the electrode regions and have a length of W0The straight line intersecting the edges of the first cell unit is a boundary line, and the seventh tab and the eighth tab in the same second cell unit are respectively located on two sides of the boundary line.
Further, in two adjacent second cell units, the seventh tab of one of the second cell units is disposed opposite to the eighth tab of the other second cell unit, and in a view direction perpendicular to a seventh current collector, the seventh tab of one of the second cell units coincides with or partially coincides with the eighth tab of the other second cell unit in the two adjacent second cell units.
The utility model 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 side, a wide side and a thick side, the long side of the single shell is parallel to the long side of the electrode area, and the wide side of the single shell is parallel to the wide side of the electrode area; and the side surfaces with the side length being the long side and the thick side of the monomer shell are monomer side surfaces, and the monomer side surfaces are provided with liquid injection ports for injecting 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, at least one first monomer lug or second monomer lug is arranged on the side face of each monomer at intervals.
The utility model also provides an energy storage device, which is characterized in that: the battery cell 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 battery cell monomer is cuboid and has a length L ', a width W ' and a thickness T '; two side surfaces with the length of side being the length L and the height H in the box body are made to be installation surfaces, and the width W of the box body and the length L' of the single battery cell meet the following requirements:
L＝L’+δ1or L ═ 2L' + δ2
Wherein, delta1And delta2Respectively, 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 single battery cell is arranged on the positioning surface, and the single battery cell is inserted in the single body inserting structure through the operation surface array; or the like, or, alternatively,
the battery cell box is characterized in that a middle positioning plate parallel to the installation surfaces is arranged in the box body, the side surfaces of two sides of the middle positioning plate are positioning surfaces, monomer inserting structures for inserting the battery cell monomers are arranged on the positioning surfaces, the installation surfaces of the box body are openable operation surfaces, and the battery cell monomers are inserted and installed on the monomer inserting structures through the operation surface arrays.
Furthermore, a stabilizing device used for enabling the battery cell monomer 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 utility model has the beneficial effects that:
according to the current collector, the electrode lug regions are arranged on the long edges of the electrode regions, the length of the long edges of the electrode regions is larger than the length of the wide edges of the electrode regions, and the maximum distance of the electrons conducted in the current collector body is the width of the electrode regions, so that the conducting distance of the electrons in the current collector body can be reduced, the conducting distance of the electrons cannot be increased under the condition that the length of the electrode regions is prolonged, and the length of the electrode regions can be set according to different use scenes without limitation; 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.
Drawings
In order to make the object, technical scheme and beneficial effect of the utility model more clear, the utility model 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 a region provided with a second tab region;
fig. 3 is a schematic structural view of the region provided with two second tab regions;
FIG. 4 is a schematic view of the structure when the sum of the lengths of the first and second polar ear regions is equal to half the perimeter of the electrode region;
fig. 5 is a schematic structural diagram of a cell in embodiment 2 of the present invention;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
fig. 7 is a schematic view of the dividing line between the first tab and the second tab;
fig. 8 is a schematic structural diagram of a laminated cell in embodiment 3 of the present invention;
fig. 9 is a sectional view taken along line B-B of fig. 8, particularly illustrating the structure of all the first tabs welded together and all the second tabs welded together;
fig. 10 is a schematic structural diagram of all the first tabs connected by the first bus bar and all the second tabs connected by the second bus bar;
fig. 11 is a schematic structural diagram of a laminated cell embodiment 4 of the present invention;
FIG. 12 is a cross-sectional view taken along line C-C of FIG. 8, particularly illustrating the structure of all third tab weld connections and all fourth tab weld connections;
fig. 13 is a schematic structural diagram of all the third tabs connected by the third bus bar and all the fourth tabs connected by the fourth bus bar;
fig. 14 is a schematic structural diagram of a laminated cell in accordance with embodiment 5 of the present invention;
fig. 15 is a schematic structural view when the first cell unit includes one cell device;
fig. 16 is a schematic structural view when the first cell unit includes three cell devices;
fig. 17 is a schematic structural diagram of a laminated cell embodiment 6 of the present invention;
fig. 18 is a schematic structural view when the second cell unit includes 4 second laminated current collectors;
fig. 19 is a schematic structural diagram of a cell unit in example 7 of the present invention;
fig. 20 is a schematic view of a cell tab when disposed on a side of a cell;
fig. 21 is a schematic structural view of a laminated cell with through holes in tab areas;
fig. 22 is a schematic structural diagram of an energy storage device in accordance with embodiment 8 of the present invention;
FIG. 23 is a schematic structural view of the case with a middle positioning plate disposed inside the case;
FIG. 24 is a schematic view showing a structure in which a partition is provided in a case.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
Example 1
As shown in fig. 1, is a schematic structural diagram of a current collector embodiment 1 of the present invention. The mass flow body of this embodiment, including the mass flow body, be equipped with electrode zone 11 and utmost point ear district on the mass flow body, electrode zone 11 is square and has long L0And width W0And L is0＞WO(ii) a The tab region comprises a first tab region 12, and the length of the first tab region 12 from one of the electrode regions 11 is L0Is formed to extend outwardly.
Further, in some embodiments, the tab region further includes a second tab region 13, the second tab region 13 having a length W from one of the electrode regions 110Is formed to extend outwardly and the first pole ear region 12 is connected to the second pole ear region 13.
Specifically, the first extreme ear region 12 of the present embodiment is square and has a length L1And width W1And L is1＝L0That is, the length of the first electrode tab region 12 is equal to the length of the electrode region 11, and the length of one of the first electrode tab region 12 covering the electrode region 11 is L0The edge of (2). The second pole ear region 13 of the present embodiment is square and has a length L2And width W2And L is2≤W0. I.e. the length of the second pole ear region 13 is less than or equal to the width of the electrode region 11.
Furthermore, in the electrode region 11, let an intersection point between the side provided with the first polar ear region 12 and the side provided with the second polar ear region 13 be a vertex, and then the corresponding intersection point of the first polar ear region 12 and the second polar ear region 13 is the vertex, and satisfies:
L1+nL2≤L0+W0
wherein n is the number of the second pole ear regions, and n is 1 or 2. That is, in some embodiments, the second polar ear region 13 may be provided as only one, as shown in fig. 2; the number of the second tab regions 13 may be two as shown in fig. 3. The sum of the lengths of the first polar ear region 12 and all the second polar ear regions 13 is less than or equal to half of the perimeter of the electrode region 11, as shown in fig. 4, and is L1+L2＝L0+W0A current collector structure diagram.
Further, the tab area further includes a third tab area 14, the third tab area 14 is located between the first tab area 12 and the second tab area 13, and the first tab area 12 is connected to the second tab area 13 through the third tab area 14. Specifically, the third pole ear region 14 has two perpendicular and intersecting perpendicular edges, one of which has a length W with the first pole ear region 121The other right-angle side and the second polar ear region 13 have a length W2Are coterminous. Specifically, the third ear region 14 is square, or a smooth curve is arranged between two right-angle sides of the third ear region 14, the third ear region 14 of the present embodiment is square, and the third ear region 14 mainly serves the technical purpose of connecting the first ear region 12 and the second ear region 13 into a whole.
In the current collector of the embodiment, the electrode lug regions are arranged on the long edges of the electrode regions, the length of the long edges of the electrode regions is greater than the length of the wide edges of the electrode regions, and the maximum distance of conduction of electrons in the current collector body is the width of the electrode regions, so that the distance of conduction of the electrons in the current collector body can be reduced, that is, the distance of conduction of the electrons cannot be increased under the condition of prolonging the length of the electrode regions, and the length of the electrode regions can be set according to different use scenes without limitation; 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.
Example 2
Fig. 5 is a schematic structural diagram of a cell in embodiment 2 of the present invention. The battery cell of the embodiment includes a first current collector 21 and a second current collector 22, where the first current collector 21 is provided with a first electrode material layer 23, and the second current collector 22 is provided with a second electrode material layer 24; 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 first pole ear region forms a first pole ear 25 and the second pole ear region forms a second pole ear 26.
Preferably, the first tab 25 and the second tab 26 are oppositely disposed in a view direction perpendicular to the first current collector 21, and a gap is formed between both ends of the first tab 25 and the second tab 26. The first tab 25 and the second tab 26 are oppositely disposed, 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.
Further, in the direction perpendicular to the view of the first current collector 21, the first electrode region and the second electrode region completely coincide with each other, such that a straight line intersecting the geometric center of the first electrode region or the second electrode region and an edge having a length W0 is a boundary line 27, and the first tab 25 and the second tab 26 are respectively located on both sides of the boundary line, as shown in fig. 7. Preferably, the first tab 25 and the second tab 26 are arranged in a central symmetry with respect to a geometric center of the first electrode zone or the second electrode zone.
The electric core of this embodiment, through adopting the current collector described in embodiment 1, can reduce the resistance of electron conduction, and simultaneously through setting up first utmost point ear 25 and second utmost point ear 26 relatively, can improve the homogeneity of the electrochemical reaction between first electrode material layer 23 and the second electrode material layer 24 to can further avoid the too high problem of inside local temperature of electric core, improve the life and the operation security performance of electric core simultaneously.
Example 3
Fig. 8 is a schematic structural diagram of a laminated cell in embodiment 3 of the present invention. The laminated cell of the present embodiment includes at least two cells as in embodiment 2, the first current collectors 21 or the second current collectors 22 of two adjacent cells are stacked together, all the first tabs 25 are connected together, and all the second tabs 26 are connected together. That is, in the laminated battery cell of the present embodiment, all the battery cells are connected in parallel.
Specifically, the connection region between the first tabs 25 and the connection region between the second tabs 26 is the length L of the first tab region 12 facing away from the electrode region 110The entire edge of (a). Of course, when the second tab region 13 is provided, the connection region between the first tabs 25 and the connection region between the second tabs 26 also includes a length L of the second tab region 13 facing away from the electrode region 112The entire edge of (a). When the third tab region 14 is provided, the connection region between the first tabs 25 and the connection region between the second tabs 26 also includes all sides of the third tab region 14 between its two perpendicular sides.
All the first lugs are welded and connected, and all the second lugs are welded and connected, as shown in fig. 9; or, the laminated cell further includes a first bus bar 28 and a second bus bar 29, all the first tabs 25 are connected together by the first bus bar 28, and all the second tabs 26 are connected together by the second bus bar 29, as shown in fig. 10.
In the laminated cell of the embodiment, all the first tabs 25 and all the second tabs 26 are connected together in the cell structure, so that all the cells are connected in parallel in the internal structure; in addition, the internal resistance of the battery cell can be reduced, and the heat generated by the internal resistance can be reduced.
Example 4
Fig. 11 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 each first laminated current collector; 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 electrolyte (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 disposed on the electrode region of the third current collector 33, and the fourth electrode material layer 32 is disposed on the electrode region of the fourth current collector 34; the tab region of the third current collector 33 forms a third tab 35 and the tab region of the fourth current collector 34 forms a fourth tab 36.
Further, in a view direction perpendicular to the third current collector 33, the third tab 35 and the fourth tab 36 are disposed opposite to each other, and gaps are respectively formed between both ends of the third tab 35 and the fourth tab 36. The third electrode material layer 31 and the fourth electrode material layer 32 can be provided to be opposed to each other, and the uniformity of the electrochemical reaction between the third electrode material layer 35 and the fourth electrode material layer 36 can be improved.
Further, in the view direction perpendicular to the third current collector, the electrode regions of all the current collectors are completely overlapped, so that the geometric center of the electrode region is crossed and the length of the electrode region is W0The straight line intersected with the edge of the third tab is a boundary line, and the third tab and the fourth tab are respectively positioned at two sides of the boundary line. Preferably, the third and fourth electrode tabs 35 and 36 of the present embodiment are arranged in a central symmetry with respect to the geometric center of the electrode regions.
Further, all of the third lugs 35 are connected together and all of the fourth lugs 36 are connected together. Specifically, all the third tabs 35 are welded and connected, and all the third tabs 35 are welded and connected, as shown in fig. 12; or, the laminated cell further includes a third bus bar 37 and a fourth bus bar 38, all the third tabs 35 are connected together by the third bus bar 37, and all the fourth tabs 36 are connected together by the fourth bus bar 38, as shown in fig. 13. Specifically, the length of the connection region between the third electrode tabs 35 and the connection region between the fourth electrode tabs 36 is L, which is the length of the first electrode tab region 12 facing away from the electrode region 110The entire edge of (a). Of course, when the second pole ear region 13 is provided, the connection region between the third pole ears 35 and the connection region between the fourth pole ears 36 also includes a length L of the second pole ear region 13 facing away from the electrode region 112The entire edge of (a). When the third pole ear region 14 is provided, the connection region between the third pole ears 35 and the connection region between the fourth pole ears 36 also includes all sides of the third pole ear region 14 between its two perpendicular sides.
The laminated battery cell of the embodiment can reduce the resistance of electron conduction by adopting the current collector of the embodiment 1, and meanwhile, the third electrode material layer 31 and the fourth electrode material layer 32 can be improved in the uniformity of electrochemical reaction by oppositely arranging the third electrode lug 35 and the fourth electrode lug 36, so that the problem of overhigh local temperature inside the battery cell can be further avoided, and the service life and the operation safety performance of the battery cell can be improved. The laminated cell of the present embodiment is connected in parallel in the internal structure by connecting all the third lugs 35 and all the fourth lugs 36 together in the cell structure.
Example 5
Fig. 14 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 electrode region and the electrode lug region arranged on the fifth current collector 42 are respectively a fifth electrode region and a fifth electrode lug region; the electrode region and the tab region arranged on the sixth current collector 43 are respectively a sixth electrode region and a sixth tab region; a fifth electrode material layer 44 is disposed on the fifth electrode region, and a sixth electrode material layer 45 is disposed on the sixth electrode region; the fifth pole ear region forms a fifth pole ear 46 and the sixth pole ear region forms a sixth pole ear 47.
The first cell unit 40 includes one cell device or at least two cell devices. As shown in fig. 16, 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; all the fifth tabs 46 in the first cell unit 40 are connected together, and all the sixth tabs 47 in the first cell unit 40 are connected together, that is, all the cell devices in the 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, that is, two adjacent first cell units 40 are connected in series.
Specifically, all the fifth tabs 46 in the first cell unit 40 are welded and connected, and all the sixth tabs 47 in the first cell unit 40 are welded and connected; in two adjacent first cell units 40, the fifth tab 46 of one of the first cell units 40 is welded to the sixth tab 47 of the other first cell unit 40.
Specifically, the connection region between the fifth tabs 46 and the connection region between the sixth tabs 47 is the length L of the first tab region 12 facing away from the electrode region 110The entire edge of (a). Of course, when the second pole lug region 13 is provided, the connection region between the fifth pole lugs 46 and the connection region between the sixth pole lugs 47 also includes a length L of the second pole lug region 13 facing away from the electrode region 112The entire edge of (a). When the third tab region 14 is provided, the connection region between the fifth tabs 46 and the connection region between the sixth tabs 47 also includes all sides of the third tab region 14 between its two perpendicular sides.
Further, in the view direction perpendicular to the fifth current collector, the fifth tab 46 and the sixth tab 47 in the same first cell unit are oppositely arranged, and a gap is respectively formed between two ends of the fifth tab 46 and the sixth tab 47. The fifth tab 46 and the sixth tab 47 are oppositely disposed, so that the uniformity of the electrochemical reaction between the fifth electrode material layer 44 and the sixth electrode material layer 45 can be improved.
Further, in the view direction perpendicular to the fifth current collector, the electrode regions of all the current collectors are completely overlapped, so that the geometric center of the electrode region is crossed and the length of the electrode region is W0The straight line intersecting the edges of the first cell unit is a boundary line, and the fifth tab and the sixth tab in the same first cell unit are respectively positioned on two sides of the boundary line. Namely, the fifth tab and the sixth tab in the same first cell unit are arranged in central symmetry with respect to the geometric center of the electrode region.
Further, in two adjacent first cell units, the fifth tab 46 of one of the first cell units 40 is disposed opposite to the sixth tab 47 of the other first cell unit 40, and in a view direction perpendicular to the fifth current collector, the fifth tab 46 of one of the first cell units 40 coincides with or partially coincides with the sixth tab 47 of the other first cell unit 40, so that the fifth tab 46 and the sixth tab 47 belonging to the two first cell units 40 can be conveniently connected together.
Example 6
Fig. 17 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 laminated 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 is arranged on the electrode area of the seventh current collector, and the eighth electrode material layer is arranged on the electrode area of the eighth current collector; the tab area of the seventh current collector forms a seventh tab 56 and the tab area of the eighth current collector forms an eighth tab 57.
All the seventh tabs 56 belonging to the same second cell unit 50 are connected together, and all the eighth tabs 57 belonging to the same second cell unit 50 are connected together; in two adjacent second cell units 50, the seventh tab 56 of one of the second cell units and the eighth tab 57 of the other second cell unit are connected together.
Further, in the present embodiment, all the seventh tabs 56 belonging to the same second battery cell unit 50 are welded and connected, and all the eighth tabs 57 belonging to the same second battery cell unit are welded and connected; and in two adjacent second cell units, the seventh tab 56 of one second cell unit is welded to the eighth tab 57 of the other second cell unit.
Further, in the view direction perpendicular to the seventh current collector, the seventh tab 56 and the eighth tab 57 in the same second cell unit are oppositely arranged, and a gap is respectively formed between two ends of the seventh tab and the eighth tab. The seventh tab 56 and the eighth tab 57 are oppositely disposed, so that the uniformity of the electrochemical reaction between the seventh electrode material layer 52 and the eighth electrode material layer 53 can be improved.
Further, in the view direction perpendicular to the seventh current collector, the electrode regions of all the current collectors are completely overlapped, so that the geometric center of the electrode region is crossed with the electrode region with the length of W0The straight line intersecting the edges of the first cell unit is a boundary line, and a seventh tab and an eighth tab in the same second cell unit are respectively positioned on two sides of the boundary line. In this embodiment, the seventh tab and the eighth tab in the same second cell unit are arranged in a central symmetry manner with respect to the geometric center of the electrode region.
Further, in two adjacent second cell units, the seventh tab 56 of one of the second cell units 50 is disposed opposite to the eighth tab 57 of the other second cell unit 50, and in a view direction perpendicular to the seventh current collector, the seventh tab 56 of one of the second cell units 50 coincides with or partially coincides with the eighth tab 57 of the other second cell unit 50 in the two adjacent second cell units 50, so that the seventh tab 56 and the eighth tab 57 belonging to the two second cell units 50 can be conveniently connected together.
Example 7
Fig. 19 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 cell casing 60, and a laminated battery cell 61 is disposed in the cell 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 case 60 is rectangular and has long sides, wide sides and thick sides, the long sides of the single body case 60 are parallel to the long sides of the electrode regions, and the wide sides of the single body case 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 this embodiment is a liquid laminated cell with a separator 69 and electrolyte between the electrode materials. The side face of the single body is provided with an electrolyte injection port 63 for injecting electrolyte, and the tab area is provided with a through hole 64 for circulating the 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 edge and the thick edge of the monomer shell are monomer end surfaces 67, monomer tabs are arranged on the monomer shell 60, and the monomer tabs are arranged on the monomer side surfaces 62 and/or the monomer end surfaces 67. Specifically, the single tab includes a first single tab 65 and a second single tab 66, the first single tab 65 and the second single tab 66 may be disposed on the same single side surface 62 or the single end surface 67, the first single tab 65 and the second single tab 66 of this embodiment are respectively disposed on the two single side surfaces 62, as shown in fig. 19, or the first single tab 65 and the second single tab 66 of this embodiment are respectively disposed on the two single end surfaces 67, as shown in fig. 20. 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 tabs 65 and the number of the second cell tabs 66 are set according to the length of the laminated battery cell 61, so as to reduce the resistance of the electronic conduction to below a set threshold value.
When the laminated battery cell 61 of the present embodiment is the laminated battery cell described in embodiment 3, the first individual tabs 65 are disposed in one-to-one correspondence with the first tabs 25, and the second individual tabs 66 are disposed in one-to-one correspondence with the second tabs 26;
when the laminated battery cell 61 of the present embodiment is the laminated battery cell described in embodiment 4, the first individual tabs 65 and the third individual tabs 35 may be disposed in a one-to-one correspondence, and the second individual tabs 66 and the fourth individual tabs 36 may be disposed in a one-to-one correspondence;
when the laminated battery cell 61 of the present embodiment is the laminated battery cell described in embodiment 5, the first individual tabs 65 and the fifth individual tabs 46 may be arranged in a one-to-one correspondence manner, and the second individual tabs 66 and the sixth individual tabs 47 may be arranged in a one-to-one correspondence manner;
when the laminated battery cell 61 of the present embodiment is the laminated battery cell described in embodiment 6, the first cell tabs 65 and the seventh cell tabs 56 may be arranged in a one-to-one correspondence, and the second cell tabs 66 and the eighth cell tabs 57 may be arranged in a one-to-one correspondence.
Example 8
Fig. 22 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 a length of L and a height of H are mounting surfaces, the width W of the box 70 and the length L' of the cell unit 71 satisfy:
L＝L’+δ1or L ═ 2L' + δ2
Wherein, delta1And delta2Respectively, 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. 22, when the length of the battery cell 71 is about the width of the box 70, one of the two installation surfaces of the box 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. 23, 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 installation 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 installation surfaces of the box 70 are openable operation surfaces, and the battery cell unit is plugged and installed on the single plugging structure through two operation surface arrays. In the energy storage device of this embodiment, can realize the grafting installation of electric core monomer 71 through operation face and locating surface, it is more convenient not only to install, can directly overhaul each electric core monomer 71 outside the box moreover and maintain, different in the inside affiliated facilities who sets up the access way of box 70 again, can effectively improve the space utilization in the box 70, improve energy storage capacity. Preferably, a stabilizing device 73 for stabilizing the cell units is arranged in the box body 70.
As shown in fig. 24, 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; a single lug is arranged on the single shell 60, and when the single lug is arranged on the side surface 62 of the single shell, 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 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 made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

Claims (42)

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, and the electrode area is square and has a long L shape0And width W0And L is0＞WO；
The electrode lug area comprises a first electrode lug area, and the length of one of the first electrode lug area and the electrode area is L0Is formed to extend outwardly.
2. The current collector of claim 1, wherein: the polar ear region also comprises a second polar ear region, and the length of one of the second polar ear region and the electrode region is W0Is formed by extending outwards, and the first polar ear area is connected with the second polar ear area.
3. The current collector of claim 2, wherein: the first tab area is square and has a length L1And width W1And L is1＝L0(ii) a The second polar ear region is square and has a length L2And width W2And L is2≤W0。
4. The current collector of claim 3, wherein: in the electrode area, the intersection point between the edge provided with the first polar ear area and the edge provided with the second polar ear area is a vertex, and the corresponding intersection point of the first polar ear area and the second polar ear area is the vertex.
5. The current collector of claim 4, wherein: l is1+nL2≤L0+W0Wherein n is the number of the second pole ear regions, and n is 1 or 2.
6. The current collector of claim 3, wherein: the pole ear district still includes third pole ear district, third pole ear district is located between first pole ear district and the second pole ear district, first pole ear district with pass through between the second pole ear district the third pole ear district links to each other.
7. The current collector of claim 6, wherein: the third polar ear region is provided with two mutually perpendicular and crossed right-angle sides, wherein one right-angle side and the length of the first polar ear region is W1The other right-angle side and the second polar ear areaLength W2Are coterminous.
8. The current collector of claim 7, wherein: the third electrode ear area is square, or a smooth curve is arranged between two right-angle edges of the third electrode ear area.
9. 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 1-8 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 forms a first pole ear, and the second pole ear area forms a second pole ear.
10. The cell of claim 9, wherein: in the view direction perpendicular to the first current collector, the first lug and the second lug are oppositely arranged, and gaps are respectively reserved between two ends of the first lug and the second lug.
11. The cell of claim 10, wherein: in a view direction perpendicular to the first current collector, the first electrode region and the second electrode region are completely overlapped, a straight line passing through a geometric center of the first electrode region or the second electrode region and intersecting with an edge with a length of W0 is a boundary line, and the first tab and the second tab are respectively located on two sides of the boundary line.
12. The cell of claim 11, wherein: the first electrode lug and the second electrode lug are arranged in a centrosymmetric mode relative to the geometric center of the first electrode area or the second electrode area.
13. A laminated cell, comprising: comprising at least two cells according to any of claims 10 to 12, the first current collectors or the second current collectors of two adjacent cells being stacked together, all of the first tabs being connected together and all of the second tabs being connected together.
14. The laminated cell of claim 13, wherein: all the first lugs are connected in a welding mode, and all the second lugs are connected in a welding mode; or the like, or, alternatively,
still include first female arranging and the female row of second, all first utmost point ear passes through first female row links together, all second utmost point ear passes through female the linking together that arranges of second.
15. A laminated cell, comprising: 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 8; 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 third mass flow body the utmost point ear district forms the third utmost point ear, the fourth mass flow body the utmost point ear district forms the fourth utmost point ear.
16. The laminated cell of claim 15, wherein: in the view direction perpendicular to the third current collector, the third lug and the fourth lug are oppositely arranged, and gaps are respectively reserved between the two ends of the third lug and the fourth lug.
17. The laminated cell of claim 16, wherein: in the view direction perpendicular to the third current collector, the electrode regions of all the current collectors are completely overlapped, so that the electrode regions pass through the geometric center of the electrode regions and have the length W0The third tab and the fourth tab are respectively positioned at two sides of the boundary.
18. The laminated cell of claim 17, wherein: the third lug and the fourth lug are arranged in a centrosymmetric mode relative to the geometric center of the electrode area.
19. The laminated cell of any of claims 16-18, wherein: all of the third ears are connected together and all of the fourth ears are connected together.
20. The laminated cell of claim 19, wherein: all of the third tab weld connections, all of the third tab weld connections; or the like, or, alternatively,
still include the third and arrange with the fourth mother, all the third tab passes through the third is arranged and is linked together, all the fourth tab passes through the fourth is arranged and is linked together.
21. 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 8 are adopted for the fifth current collector and the sixth current collector; enabling an electrode area and a tab area arranged on the fifth current collector to be a fifth electrode area and a fifth tab area respectively; the electrode area and the electrode lug area which are arranged on the sixth current collector are respectively a sixth electrode area and a sixth electrode lug area; the fifth electrode material layer is arranged on the fifth electrode region, and the sixth electrode material layer is arranged on the sixth electrode region; the fifth pole lug area forms a fifth pole lug, and the sixth pole lug area forms a sixth pole 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; all the fifth tabs in the first cell unit are connected together, and all the sixth tabs in the first cell unit 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.
22. The laminated cell of claim 21, wherein: all the fifth lugs in the first cell unit are welded and connected, and all the sixth lugs in the first cell unit are welded and connected; 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.
23. The laminated cell of claim 21, wherein: in a view direction perpendicular to the fifth current collector, the fifth tab and the sixth tab in the same first cell unit are oppositely arranged, and gaps are respectively formed between two ends of the fifth tab and the sixth tab.
24. The laminated cell of claim 23, wherein: in the view direction perpendicular to the fifth current collector, the electrode regions of all the current collectors are completely overlapped, so that the electrode regions pass through the geometric center of the electrode regions and have the length W0The straight line intersecting the edges of the first cell unit is a boundary line, and the fifth tab and the sixth tab in the same first cell unit are respectively positioned on two sides of the boundary line.
25. The laminated cell of claim 24, wherein: the fifth tab of one of the two adjacent first cell units is arranged opposite to the sixth tab of the other first cell unit; and in a view direction perpendicular to the fifth current collector, the fifth tab of one of the two adjacent first cell units coincides with or partially coincides with the sixth tab of the other first cell unit.
26. A laminated cell, comprising: 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 seventh electrode material layers or eighth electrode material layers are 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 using a current collector according to any one of claims 1 to 8; 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 disposed on the electrode region of the seventh current collector, and the eighth electrode material layer is disposed on the electrode region of the eighth current collector; the lug area of the seventh current collector forms a seventh lug, and the lug area of the eighth current collector forms an eighth lug;
all the seventh tabs belonging to the same second cell unit are connected together, and all the eighth tabs belonging to the same second cell unit 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.
27. The laminated cell of claim 26, wherein: all the seventh lugs belonging to the same second cell unit are connected in a welded mode, and all the eighth lugs belonging to the same second cell unit are connected in a welded 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.
28. The laminated cell of claim 26, wherein: in a view direction perpendicular to the seventh current collector, the seventh tab and the eighth tab in the same second cell unit are oppositely arranged, and gaps are respectively formed between two ends of the seventh tab and the eighth tab.
29. The laminated cell of claim 28, wherein: in the view direction perpendicular to the seventh current collector, the electrode regions of all the current collectors are completely overlapped, so that the electrode regions pass through the geometric center of the electrode regions and have the length W0The straight line intersecting the edges of the first cell unit is a boundary line, and the seventh tab and the eighth tab in the same second cell unit are respectively positioned on two sides of the boundary line.
30. The laminated cell of claim 29, wherein: in two adjacent second cell units, the seventh tab of one of the second cell units is opposite to the eighth tab of the other second cell unit, and in a view direction perpendicular to a seventh current collector, the seventh tab of one of the second cell units coincides with or partially coincides with the eighth tab of the other second cell unit in the two adjacent second cell units.
31. A battery cell monomer is characterized in that: comprising a cell casing having a laminated cell according to any of claims 13 to 30 disposed therein.
32. The cell monomer of claim 31, 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; and the side surfaces with the side length being the long side and the thick side of the monomer shell are monomer side surfaces, and the monomer side surfaces are provided with liquid injection ports for injecting electrolyte.
33. The cell monomer of claim 32, wherein: and the two monomer side surfaces of the monomer shell are respectively provided with the liquid injection port.
34. The cell monomer of claim 33, wherein: at least two liquid injection ports are respectively arranged on the side surfaces of the single bodies at intervals.
35. The cell monomer of claim 31, 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.
36. The cell monomer of claim 35, 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.
37. The cell monomer of claim 36, wherein: and at least one first monomer lug or second monomer lug is arranged on the side surface of each monomer at intervals.
38. An energy storage device, characterized by: comprises a box body, wherein at least one battery cell monomer of any one of claims 31-37 is arranged in the box body.
39. The energy storage device of claim 38, wherein: the box body is cuboid and has a length L, a width W and a height H; the battery cell monomer is cuboid and has a length L ', a width W ' and a thickness T '; two side surfaces with the length of side being the length L and the height H in the box body are made to be installation surfaces, and the width W of the box body and the length L' of the single battery cell meet the following requirements:
L＝L’+δ1or L ═ 2L' + δ2
Wherein, delta1And delta2Respectively, the thickness occupied by other accessory structures in the tank width direction.
40. The energy storage device of claim 39, 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 battery cell single body is arranged on the positioning surface, and the battery cell single body is inserted in the single body inserting structure through the operation surface array; or the like, or, alternatively,
the battery cell box is characterized in that a middle positioning plate parallel to the installation surfaces is arranged in the box body, the side surfaces of two sides of the middle positioning plate are positioning surfaces, monomer inserting structures for inserting the battery cell monomers are arranged on the positioning surfaces, the installation surfaces of the box body are openable operation surfaces, and the battery cell monomers are inserted and installed on the monomer inserting structures through the operation surface arrays.
41. The energy storage device of claim 40, wherein: and a stabilizing device used for keeping the electric core monomer stable is arranged in the box body.
42. The energy storage device of claim 39, 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.
CN202122225867.5U 2021-09-14 2021-09-14 Current collector, battery cell, laminated battery cell, battery cell monomer and energy storage device Active CN215869468U (en)

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