CN218004966U - Composite solid electrolyte, battery cell and bipolar battery - Google Patents

Composite solid electrolyte, battery cell and bipolar battery Download PDF

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Publication number
CN218004966U
CN218004966U CN202221704420.4U CN202221704420U CN218004966U CN 218004966 U CN218004966 U CN 218004966U CN 202221704420 U CN202221704420 U CN 202221704420U CN 218004966 U CN218004966 U CN 218004966U
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solid electrolyte
insulating ring
electrolyte membrane
composite solid
membrane material
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袁涛
张如青
郭姿珠
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BYD Co Ltd
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BYD Co Ltd
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Abstract

The utility model provides a compound solid electrolyte and electric core, bipolar battery. The composite solid electrolyte comprises a solid electrolyte membrane material and an insulating ring, wherein the insulating ring is arranged around the periphery of the solid electrolyte membrane material; and/or the insulating ring is provided on an edge of at least one side surface of the solid electrolyte membrane material. The preset region of the composite solid electrolyte is provided with the insulating ring, and when the insulating ring is assembled in the bipolar battery, the existence of the insulating ring can effectively prevent different solid electrolyte membrane materials from being in direct contact, so that the bipolar battery with stable structure and performance can be provided.

Description

Composite solid electrolyte, battery cell and bipolar battery
Technical Field
The utility model relates to a battery technology field, concretely relates to compound solid state electrolyte and electric core, bipolar battery.
Background
The bipolar electrode pole pieces are formed by respectively coating active substances with different polarities on two opposite surfaces of a bipolar current collector and forming a battery in a mode of connecting a plurality of bipolar pole pieces and a plurality of solid electrolytes in series and overlapping. However, after different solid electrolytes in the bipolar battery are contacted with each other, ions can flow between different solid electrolytes, so that the ions are short-circuited, and the voltage of the battery is reduced. Therefore, it is necessary to have a structure in which the electrodes and the solid electrolyte are independent of each other.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a compound solid state electrolyte and electric core, bipolar battery. The insulating ring is arranged at the preset position of the composite solid electrolyte, and when the composite solid electrolyte is assembled in a bipolar battery with a plurality of bipolar pole pieces and the composite solid electrolyte, the insulating ring can effectively prevent different solid electrolyte membrane materials from being in direct contact, so that the composite solid electrolyte can be used for providing the bipolar battery with stable structure and performance.
The utility model provides a composite solid electrolyte, which comprises a solid electrolyte membrane material and an insulating ring, wherein the insulating ring is arranged around the periphery of the solid electrolyte membrane material; and/or the insulating ring is provided on an edge of at least one side surface of the solid electrolyte membrane material.
The insulating ring is arranged at the preset position of the composite solid electrolyte, when the composite solid electrolyte is assembled with a battery with a plurality of stacked bipolar pole pieces and solid electrolyte layers, the bipolar pole pieces can be effectively separated, the phenomenon of electronic short circuit of the battery is avoided, the insulating ring at the preset position can also fully isolate different solid electrolyte membrane materials from direct contact, so that the risk of ionic short circuit of the bipolar battery can be remarkably reduced, the stability of the bipolar battery is improved, and the full play of the performance of the battery is facilitated.
The utility model discloses the second aspect provides an electricity core, electricity core include a plurality of range upon range of and the bipolar electrode pole piece that sets up in turn and the utility model discloses the compound solid electrolyte that the first aspect provided.
The battery cell is provided with a plurality of series-connection superposed composite solid electrolytes and bipolar pole pieces, the composite solid electrolytes can separate different bipolar pole pieces, and the risk of ion short circuit caused by mutual contact of different solid electrolytes (namely, solid electrolyte membrane materials) can be remarkably reduced, so that the battery cell can be used for providing a bipolar battery with stable structure and performance.
The third aspect of the present invention provides a bipolar battery having the electric core provided by the second aspect of the present invention.
The bipolar battery has the advantages of higher voltage, higher energy density and higher overcurrent capacity, and the performance of the bipolar battery is stable.
Drawings
Fig. 1 is a top view of a composite solid electrolyte according to an embodiment of the present invention;
fig. 2 is a front view of a composite solid electrolyte according to an embodiment of the present invention;
fig. 3 is a front view of a composite solid electrolyte according to yet another embodiment of the present invention;
fig. 4 is a top view of a disassembled insulating ring of a composite solid electrolyte provided by another embodiment of the present invention;
fig. 5 is a top view of a composite solid electrolyte according to another embodiment of the present invention;
fig. 6 is a cross-sectional view of a battery cell according to an embodiment of the present invention;
fig. 7 is a cross-sectional view of a battery cell according to another embodiment of the present invention.
Description of the drawings: 11-a composite solid electrolyte; 111-solid electrolyte membrane material; 112-an insulating ring; 12-bipolar electrode pole pieces; 121-positive electrode active material layer; 122-positive current collector; 123-negative current collector; 124-negative active material layer.
Detailed Description
The following describes the technical solution of the present invention in detail with reference to the accompanying drawings.
Please refer to fig. 1-5 together. The embodiment of the present invention provides a composite solid electrolyte 11, which includes a solid electrolyte membrane 111 and an insulating ring 112, wherein the insulating ring 112 is disposed on an edge of at least one side surface of the solid electrolyte membrane 111 (as shown in fig. 1-2); and/or an insulating ring 112 is disposed around the periphery of the solid electrolyte membrane material 111 (see fig. 3-5).
In the present invention, "the insulating ring 112 is disposed on the edge of at least one side surface of the solid electrolyte membrane 111" means that the insulating ring 112 is disposed on at least one surface of two surfaces of the solid electrolyte membrane 111 perpendicular to the thickness direction thereof, and is disposed on the edge of the at least one surface; the phrase "the insulating ring 112 is provided around the periphery of the solid electrolyte membrane material 111" means that the insulating ring 112 is provided on the outer peripheral wall of the solid electrolyte membrane material 111 parallel to the thickness direction thereof.
In the present invention, the insulating ring 112 is an annular structure made of insulating material, and the inner and outer contours of the annular structure can be square, circular, or other curved or polygonal shapes. The inner or outer contour of the insulating ring 112 needs to match the solid electrolyte membrane 111.
In the present invention, the insulating ring 112 may be disposed on one side of the solid electrolyte membrane 111 or on the edge of the opposite surfaces. At this time, at least one surface of the solid electrolyte membrane material 111 includes a non-insulating region and an insulating region surrounding the non-insulating region, and the insulating region is provided with an insulating ring 112. In this case, the insulating ring 112 may be formed by directly applying an insulating material to a predetermined region of the solid electrolyte film to form a ring-shaped insulating film, or may be formed by attaching a ring-shaped insulating film to a predetermined position on the surface of the solid electrolyte film. When the composite solid electrolyte is assembled in a bipolar battery, the insulating ring mainly plays a role of isolating different solid electrolyte membrane materials 111 from contacting with each other, so that the phenomenon of ionic short circuit of the battery can be well prevented.
Particularly, when the composite solid electrolyte 11 is assembled in the battery cell, in order to ensure that the non-insulating region of the composite solid electrolyte can be sufficiently attached to the adjacent bipolar electrode plate, thereby ensuring the normal flow of ions and the normal operation of the battery, the solid electrolyte membrane material 111 or the corresponding region of the bipolar electrode plate 12 can be thinned. For example, the thickness of the insulating region of the solid electrolyte membrane material 111 may be thinned so that the composite solid electrolyte 11 has a flat surface, that is, so that the upper surface of the insulating ring 112 is flush with the upper surface of the non-insulating region of the solid electrolyte membrane material 111.
In other cases, the insulating ring 112 may also be disposed around the periphery of the solid electrolyte membrane material 111, the insulating ring 112 constituting an annular insulating film. In this case, the insulating ring 112 may be fixed on the periphery of the solid electrolyte membrane material by dispensing and bonding, and the thickness of the insulating ring 112 may be smaller than or equal to the thickness of the solid electrolyte membrane material 111, so as to avoid insufficient adhesion with the bipolar electrode tab 12 when the insulating ring 112 is assembled into the battery cell due to an excessively large thickness. At this time, the insulating ring 112 is used as an extension part of the solid electrolyte membrane material 111, when the composite solid electrolyte is assembled in the bipolar battery, the insulating ring 112 can isolate different bipolar pole pieces from contacting with each other, and meanwhile, the risk of direct contact of different solid electrolyte membrane materials 111 caused by process errors in the battery preparation process can be remarkably reduced, so that the battery can be well prevented from generating electronic and ionic short circuits.
In still other cases, the insulating ring 112 may be present on both the edge of one or both side surfaces of the solid electrolyte membrane material 111 and the periphery of the solid electrolyte membrane material 111 (a combination of the foregoing two cases). At this time, the insulating ring 112, which is formed to include the oppositely disposed two faces and the side face connecting the oppositely disposed two faces, may be fitted around the periphery of the solid electrolyte membrane material 111; wherein, two faces of the insulating ring 112 which are oppositely arranged are used for being arranged at the edges of two side surfaces of the solid electrolyte membrane material 111, and the side faces of the insulating ring 112 which are connected with the two faces which are oppositely arranged are used for being arranged at the periphery of the solid electrolyte membrane material 111.
In some embodiments of the present invention, the projected area of the insulating ring 112 on the composite solid electrolyte 11 accounts for 1% -30% of the area of the composite solid electrolyte 11. Preferably, in some embodiments, the orthographic area of the insulating ring 112 on the composite solid electrolyte 11 is 2% to 20% of the composite solid electrolyte area 11. Illustratively, the orthographic area of the insulating ring 112 on the composite solid electrolyte 11 accounts for 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, etc., of the composite solid electrolyte area. At this time, the area ratio of the non-insulating region in the composite solid electrolyte 11 is large, and the cost of the product is low.
In the present invention, the electronic conductivity and the ionic conductivity of the insulating ring 112 are both less than 10 -9 And (5) S/m. In some embodiments, the insulating ring is made of a material including, but not limited to, alumina, boehmite, silica, polyethylene, and polypropylene.
The embodiment of the utility model provides an electric core is still provided, contain above-mentioned compound solid electrolyte 11.
Specifically, referring to fig. 6 to 7, an electric core provided in an embodiment of the present invention includes a plurality of stacked and alternately arranged composite solid electrolytes 11 and bipolar electrode plates 12. Specifically, the battery cell simultaneously includes a plurality of composite solid electrolytes 11 and a plurality of bipolar electrode pole pieces 12, and the composite solid electrolytes 11 and the bipolar electrode pole pieces 12 are alternately and stacked.
It should be noted that, in the illustration provided in the present invention, the battery cell, the composite solid electrolyte 11 and the bipolar electrode plate 12 are all illustrated as rectangles. In fact, the shapes of the above components may be curved or other polygonal shapes, and the outer contours of the insulating ring 112, the bipolar electrode tab 12, the composite solid electrolyte 11 and/or the solid electrolyte membrane 111 need to match each other.
In some embodiments of the present invention, the surface of the solid electrolyte membrane 111 includes a first surface and a second surface that are oppositely disposed along the stacking direction, the insulating ring 112 is disposed on the first surface of the solid electrolyte membrane 111, and the first surface and the second surface of different solid electrolyte membrane 111 are alternately disposed in the plurality of solid electrolyte membrane 111 of the battery cell (please refer to fig. 1-2 and 6 together); the bipolar electrode pole piece 12 has a length L along the first direction 1 Along the first edgeWidth in two directions of L 2 The length of the region of the solid electrolyte film 111 not covered by the insulating ring 112 (corresponding to the non-insulating region of the solid electrolyte film 111) in the first direction is L 3 A width L along the second direction 4 The length of the composite solid electrolyte 11 in the first direction is L 3 ' and a width in the second direction is L 4 '; wherein the first direction is a length or width direction of the composite solid electrolyte 11, and the second direction is perpendicular to the first direction;
wherein L is 3 ≤L 1 ≤L 3 ’，L 4 ≤L 2 ≤L 4 ’。
L 3 ≤L 1 、L 4 ≤L 2 The non-insulation area of the solid electrolyte membrane material 111 is completely covered by the bipolar electrode pole piece 12, and the non-insulation area is prevented from being directly exposed, so that the situation that different (particularly adjacent) solid electrolyte membrane materials 111 are contacted with each other and ion short circuit is caused can be avoided; l is a radical of an alcohol 1 ≤L 3 ’、L 2 ≤L 4 ' the sizes of the composite solid electrolyte 11 are all larger than or equal to the sizes of the bipolar electrode pole pieces 12, so that different (especially adjacent) bipolar electrode pole pieces 12 can be ensured to be fully separated and not to be contacted with each other, the electronic short circuit is avoided, and the voltage stability of the bipolar battery can be ensured.
In other words, when the dimensions of the bipolar electrode pad 12 and the composite solid electrolyte 11 satisfy the above requirements, the composite solid electrolyte 11 may not only separate different bipolar electrode pads 12, but also the portion that may itself be in contact with other composite solid electrolytes 11 is entirely covered with an insulating ring.
In the present invention, when only one side surface edge of the solid electrolyte membrane 111 is provided with the insulating ring 112, in each of the composite solid electrolytes 11, each insulating ring 112 should be disposed on the same side surface, for example, the first side, of the solid electrolyte membrane 111. At this time, the surface of the solid electrolyte membrane material with the insulating ring 112 is a first surface, and the surface without the insulating ring 112 is a second surface. Illustratively, a cell includes 3 composite solid electrolytes 11 stacked and alternately arranged, where the first surface (the surface with the insulating ring 112) of the 3 solid electrolyte membrane materials 111 is denoted as a, and the second surface (the surface without the insulating ring 112) is denoted as b, and then the surfaces of the composite solid electrolytes 11 are arranged in the thickness direction of the cell as ab, and ab in sequence.
The utility model discloses in, also can be that the relative both sides of each solid electrolyte membrane material 111 all are equipped with insulating ring 112 on the surface, no longer do the actual differentiation to the first face and the second face of solid electrolyte membrane material 111 this moment, each size all satisfy aforementioned relation can.
In some embodiments, the width of the insulating ring 112 is greater than 0cm and less than or equal to 2 cm. In some embodiments, the width of the insulating ring 112 is in a range greater than 0cm and less than or equal to 1 cm. Illustratively, the width of the insulating ring 112 may be 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm, 1.2cm, 1.5cm, 2.0cm, and the like. The width of the insulating ring 112 specifically refers to the distance from the outer contour of the non-insulating region of the solid electrolyte membrane material 111 to the outer contour of the insulating ring 112. The width of the insulating ring can be equal or unequal. Controlling the width of the insulating ring 112 within the above range not only reserves space for possible process errors in the battery preparation process, but also improves the area ratio of the non-insulating region of the solid electrolyte membrane material 111 as much as possible while being beneficial to ensuring that the insulating ring 112 can play its fundamental role, and reduces the production cost.
In some embodiments, the insulating ring 112 is disposed around the periphery of the solid electrolyte membrane 111 (see fig. 3-5 and 7). The bipolar electrode tab 12 has a length L along the first direction 1 A width L along the second direction 2 The length of the solid electrolyte membrane material 111 along the first direction is L 3 ", the width along the second direction is L 4 ", the two widths of the insulating ring 112 along the first direction are L respectively 5 And L 5 ', two widths of the insulating ring 112 along the second direction are L respectively 7 And L 7 '; wherein the first direction is a length or width direction of the solid electrolyte membrane material 111, and the second direction is perpendicular to the upper directionThe first direction;
wherein L is 3 ”≤L 1 ≤L 3 ”+L 5 +L 5 ’，L 4 ”≤L 2 ≤L 4 ”+L 7 +L 7 ’。
Similarly, L 3 ”≤L 1 ≤L 3 ”+L 5 +L 5 ’，L 4 ”≤L 2 ≤L 4 ”+L 7 +L 7 ' different composite solid electrolytes 11 and different bipolar electrode pole pieces 12 can be separated, and the details are not repeated here.
In the utility model, the L 5 And L 5 ' respectively represents the width of the insulating ring 112 (specifically, the distance from the inner contour of the insulating ring 112 to the outer contour of the insulating ring 112, see fig. 4), L, which are located on opposite sides of the solid electrolyte membrane material 111 along the first direction 7 And L 7 ' respectively represent the widths of the insulating rings 112 located on opposite sides of the solid electrolyte membrane material 111 in the second direction. L above 5 、L 5 ’、L 7 、L 7 The values of' may or may not be equal. In some embodiments, the above L 5 、L 5 ’、L 7 、L 7 ' are each in the range of greater than 0cm and less than or equal to 2 cm. In some embodiments, L is 5 、L 5 ’、L 7 、L 7 ' are each in the range of greater than 0cm and less than or equal to 1 cm. Illustratively, L is as defined above 5 、L 5 ’、L 7 、L 7 The value of' may be independently 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.0cm, 1.2cm, 1.5cm, 2.0cm, etc. Controlling the above values within a certain range is beneficial to reducing unnecessary waste caused by the oversize of the composite solid electrolyte 11, and can avoid the problem that the assembly of the battery cell is not facilitated due to the oversize area of the insulation ring 112 extending outwards.
In some embodiments, the insulating ring 112 has an inner diameter L along the first direction 6 The inner diameter of the insulating ring 112 along the second direction is L 8 (see FIG. 4), L 3 ”≤L 6 ≤1.1L 3 ”，L 4 ”≤L 8 ≤1.1L 4 ". Preferably, in some embodiments, L 3 ”≤L 6 ≤1.05L 3 ”，L 4 ”≤L 8 ≤1.05L 4 ". At this time, a clearance fit can be formed between the insulating ring 112 and the solid electrolyte membrane 111, which can provide a certain adjustment space for process error and can control the size of the composite solid electrolyte 11 within a proper range.
In some embodiments of the present invention, the bipolar electrode plate 12 comprises a bipolar current collector and positive and negative active material layers respectively disposed on two side surfaces of the bipolar current collector. In some cases, the bipolar current collector is a single sheet of aluminum foil, and both side surfaces of the aluminum foil are provided with positive and negative active material layers, respectively.
In other cases, the bipolar current collector may be a composite current collector, and may be assembled by positive and negative current collectors commonly used in the art, that is, the bipolar electrode tab 12 includes a positive active material layer 121, a positive current collector 122, an adhesive layer, a negative current collector 123, and a negative active material layer 124, which are sequentially stacked; wherein the adhesive layer comprises a porous polymer film filled with a conductive adhesive.
At this time, the positive electrode part (including the positive active material layer 121 and the positive current collector 122, for convenience of description, the positive part is denoted as a) and the negative electrode part (including the negative current collector 123 and the negative active material layer 124, for convenience of description, the negative part is denoted as B) of the bipolar electrode tab 12 can be processed separately, so as to avoid mutual influence of different solvents used by the positive and negative active material layers in the drying process, and more importantly, the rolling process parameters can be determined according to respective materials of the positive and negative active material layers, so that the problem that when a single current collector is used, the rolling parameters are not in accordance with the characteristics of the active material on a certain side, and the active material particles are cracked due to excessive pressure, or the volume energy density is lost due to small compaction density of the active material layer on a certain side due to too small pressure is avoided. In addition, the polymer film is small in mass and has certain structural strength, and the thickness of the positive current collector and the negative current collector can be reduced due to the polymer film, so that the total mass of the current collectors can be reduced, and the energy density of the battery can be improved.
In the utility model, the porosity of the porous polymer film is in the range of 40-70%, and the aperture is in the range of 0.1-20 mm. The thickness of the above porous polymer film is in the range of 1 μm to 10 μm. The porous polymer film may be an insulating polymer film, or may be a common polymer film, and is preferably an insulating polymer film. The utility model discloses in, above-mentioned insulating porous polymer membrane's electronic conductivity and ionic conductivity all are less than 10 -9 And (5) S/m. The material of the insulating porous polymer film includes, but is not limited to, polyetheretherketone, polyethylene terephthalate, polyimide, polyphenylene oxide.
When the porous polymer film is made of an insulating material, the transverse dimension of the porous insulating polymer film can be controlled to be larger than the transverse dimensions of the positive and negative electrode active material layers and the composite solid electrolyte 11, so that the positive and negative electrode active material layers and the composite solid electrolyte 11 can be effectively prevented from being in contact with each other, and the risk of short circuit in the bipolar battery is further reduced. It should be noted that the portions of the porous insulating polymer films extending outside the positive and negative current collectors may not be filled with conductive paste.
The utility model discloses in, do not restrict bipolar electrode pole piece's the orientation of putting. For convenience, the composite solid electrolyte is referred to as C, and when the stacked composite solid electrolyte and bipolar electrode plate are placed, the placing order of each part may be ABC or BAC, but it is required to ensure that the positive and negative current collectors are always connected back to back.
In the present invention, the edges of the positive electrode part a and the negative electrode part B are flush, and the size of the positive electrode part a is smaller than that of the negative electrode part B, and at this time, the sizes (L) of the bipolar electrode plate 12 are different from each other 1 、L 2 ) The larger size of the negative electrode portion is taken as the standard.
The utility model discloses in, still include two unipolar pole pieces (positive pole piece, negative pole piece) in the electric core, and above-mentioned a plurality of range upon range of and set up in turn a plurality of compound solid-state electrolytes 11 and a plurality of bipolar electrode pole pieces 12 place between above-mentioned two unipolar pole pieces.
The utility model also provides a bipolar battery contains above-mentioned electric core. The bipolar battery has the advantages of higher voltage, higher energy density and higher overcurrent capacity, and has stable performance.
The following describes the present technology in detail with reference to specific embodiments.
Example 1
An electric core comprises a positive pole piece, 5 composite solid electrolytes which are stacked and alternately arranged, 4 bipolar pole pieces and a negative pole piece. The composite solid electrolyte comprises a solid electrolyte membrane material and an insulating ring arranged on the edge of the first surface of the solid electrolyte membrane material. Dimension L of bipolar electrode pole piece along first direction 1 A dimension L of 8cm in the second direction 2 Is 7cm; dimension L of the area of the solid electrolyte membrane material not covered by the insulating ring along the first direction 3 A dimension L of 7cm in the second direction 4 6.5cm, the dimension L of the composite solid electrolyte along the first direction 3 ' 10cm, dimension L in second direction 4 ' is 8cm; the width of the insulating ring is 0.5cm everywhere. The first direction is the length direction of the solid electrolyte membrane material, and the second direction is perpendicular to the first direction.
Example 2
The differences from example 1 are: the insulating ring is disposed around the periphery of the solid electrolyte membrane material. Length L of bipolar electrode pole piece along first direction 1 A width L of 10cm along the second direction 2 8cm, length L of the solid electrolyte membrane material along the first direction 3 "8 cm, length L in second direction 4 "7 cm, two widths L of the insulating ring along the first direction 5 And L 5 Both are 2cm, inner diameter L 6 8.8cm, two widths L of the insulating ring along the second direction 7 And L 7 Both are 1cm, inner diameter L 8 It was 7.5cm. Wherein, the clearance between the insulating ring and the solid electrolyte membrane material is filled with insulating glue.
The foregoing is an exemplary embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (14)

1. A composite solid electrolyte, characterized in that the composite solid electrolyte (11) comprises a solid electrolyte membrane material (111) and an insulating ring (112), the insulating ring (112) being disposed around the periphery of the solid electrolyte membrane material (111); and/or the insulating ring (112) is provided on an edge of at least one side surface of the solid electrolyte membrane material (111).
2. The composite solid electrolyte (11) according to claim 1, characterized in that the orthographic area of the insulating ring (112) on the composite solid electrolyte (11) in the thickness direction of the composite solid electrolyte (11) is 1-30% of the area of the composite solid electrolyte (11).
3. The composite solid electrolyte (11) according to claim 2, characterized in that the orthographic area of the insulating ring (112) on the composite solid electrolyte (11) in the thickness direction of the composite solid electrolyte (11) is 2-20% of the area of the composite solid electrolyte (11).
4. The composite solid electrolyte (11) according to claim 1, wherein the surface of the solid electrolyte membrane material (111) comprises a non-insulating region and an insulating region surrounding the non-insulating region, and the insulating region is provided with the insulating ring (112).
5. A battery cell, characterized in that it comprises a plurality of stacked and alternating bipolar electrode pole pieces (12) and a composite solid-state electrolyte (11) according to any of claims 1 to 4.
6. According to the rightThe cell of claim 5, wherein the surface of the solid electrolyte membrane material (111) comprises a first face and a second face oppositely arranged along the stacking direction, the insulating ring (112) is arranged on the first face of the solid electrolyte membrane material (111), and the first face and the second face of different solid electrolyte membrane materials (111) are alternately arranged in the cell; wherein the bipolar electrode pole piece (12) has a length L along a first direction 1 A width in the second direction of L 2 The length of the area, which is not covered by the insulating ring (112), of the solid electrolyte membrane material (111) along the first direction is L 3 A width L along the second direction 4 The length of the composite solid electrolyte (11) along the first direction is L 3 ' and a width in the second direction is L 4 '; wherein the first direction is a length or width direction of the composite solid electrolyte (11), and the second direction is perpendicular to the first direction;
wherein L is 3 ≤L 1 ≤L 3 ’，L 4 ≤L 2 ≤L 4 ’。
7. The cell of claim 6, wherein the insulating rings (112) each have a width in a range greater than 0cm and less than or equal to 2 cm.
8. The cell of claim 7, wherein the insulating rings (112) each have a width in a range greater than 0cm and less than or equal to 1 cm.
9. The electrical core of claim 5, wherein the insulating ring (112) is disposed around the periphery of the solid electrolyte membrane material (111), and wherein the bipolar electrode pole piece (12) has a length L in the first direction 1 A width L along the second direction 2 The length of the solid electrolyte membrane material (111) along the first direction is L 3 ", the width along the second direction is L 4 ", two widths of the insulation ring (112) along the first direction are respectively L 5 And L 5 ', said insulating ring (112) alongTwo widths in the second direction are respectively L 7 And L 7 '; wherein the first direction is a length or width direction of the solid electrolyte membrane material (111), and the second direction is perpendicular to the first direction;
wherein L is 3 ”≤L 1 ≤L 3 ”+L 5 +L 5 ’，L 4 ”≤L 2 ≤L 4 ”+L 7 +L 7 ’。
10. The cell of claim 9, wherein the insulating ring (112) has an inner diameter L in the first direction 6 The inner diameter of the insulating ring (112) along the second direction is L 8 ，L 3 ”≤L 6 ≤1.1L 3 ”，L 4 ”≤L 8 ≤1.1L 4 "; said L 5 、L 5 ’、L 7 、L 7 ' are each in the range of greater than 0cm and less than or equal to 2 cm.
11. The cell of claim 10, wherein L is L 3 ”≤L 6 ≤1.05L 3 ”，L 4 ”≤L 8 ≤1.05L 4 ”。
12. The cell of claim 10, wherein L is L 5 、L 5 ’、L 7 、L 7 ' are each in the range of greater than 0cm and less than or equal to 1 cm.
13. The electric core according to any one of claims 5 to 12, wherein the bipolar electrode sheet (12) comprises a positive active material layer (121), a positive current collector (122), an adhesive layer, a negative current collector (123) and a negative active material layer (124) which are sequentially stacked; wherein the adhesive layer comprises a porous polymer film filled with a conductive adhesive.
14. A bipolar battery comprising the cell of any of claims 5-13.
CN202221704420.4U 2022-06-30 2022-06-30 Composite solid electrolyte, battery cell and bipolar battery Active CN218004966U (en)

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CN202221704420.4U CN218004966U (en) 2022-06-30 2022-06-30 Composite solid electrolyte, battery cell and bipolar battery

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CN218004966U true CN218004966U (en) 2022-12-09

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