CN210926032U - Battery piece and battery cluster, battery unit and photovoltaic module that have it - Google Patents
Battery piece and battery cluster, battery unit and photovoltaic module that have it Download PDFInfo
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- CN210926032U CN210926032U CN201922203101.XU CN201922203101U CN210926032U CN 210926032 U CN210926032 U CN 210926032U CN 201922203101 U CN201922203101 U CN 201922203101U CN 210926032 U CN210926032 U CN 210926032U
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- battery
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- 210000004027 cell Anatomy 0.000 claims description 53
- 210000002858 crystal cell Anatomy 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a battery piece and battery cluster, battery unit and photovoltaic module that have it, the battery piece includes: a plurality of sub-battery pieces, a plurality of the sub-battery pieces comprise a first battery piece and a plurality of second battery pieces, the first battery pieceBe equipped with a plurality of first grid lines that set up along the second direction interval on, every be equipped with a plurality of second grid lines that set up along the second direction interval on the second battery piece, the back of first battery piece is equipped with at least one auxiliary electrode, works as when the battery piece is single crystal battery piece, satisfies:
when the battery piece is a polycrystalline battery piece, the following conditions are satisfied:
according to the utility model discloses a battery piece makes every second battery piece be in the light total area equal with the total area that is in the light of first battery piece to when the area of second battery piece and first battery piece is equal, can guarantee that the electric current that flows through second battery piece and first battery piece equals, avoid appearing the mismatch.
Description
Technical Field
The utility model belongs to the technical field of the photovoltaic technology and specifically relates to a battery piece and have its battery cluster, battery cell and photovoltaic module is related to.
Background
In recent years, the technology of the laminated module is gradually raised in China, the solar cells can be tightly connected in a laminated mode by adopting the technology of the laminated module, and gaps among the solar cells are reduced to the minimum, so that more solar cells can be laminated in the same unit area, meanwhile, welding strips are not needed for connection, the series resistance among photovoltaic modules is reduced, and the cost of the welding strips is saved while the power of the photovoltaic modules is improved.
In the related technology, the back auxiliary electrode of the double-sided laminated tile battery is welded, so that the light leakage area of the small battery piece where the auxiliary electrode is located is different from the light leakage area of other small battery pieces, and the serious mismatch problem exists among the small battery pieces.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery plate, in which light blocking areas of a first battery plate and a second battery plate are equal, and mismatch can be avoided.
Another object of the present invention is to provide a battery string having the above battery plate.
It is another object of the present invention to provide a battery unit having the above battery string.
It is another object of the present invention to provide a photovoltaic module having the above battery unit.
According to the utility model discloses battery piece of first aspect embodiment includes: a plurality of subcells, it is a plurality of the subcell sets gradually along first direction, and is a plurality of the subcell includes first battery piece and a plurality of second battery piece, and is a plurality of the second battery piece is in keep away from along the orientation in the first direction the direction of first battery piece is arranged in proper order, be equipped with a plurality of first grid lines that set up along the second direction interval on the first battery piece, every be equipped with a plurality of second grid lines that set up along the second direction interval on the second battery piece, the second direction with the first direction is perpendicular, the back of first battery piece is equipped with at least one auxiliary electrode, works as when the battery piece is single crystal battery piece, first battery piece with the second battery piece satisfies:
when the battery piece is a polycrystalline battery piece, the second battery piece and the first battery piece meet the following conditions:
wherein, said s1For the length of the first cell piece in the second direction, v1Is the distance between two adjacent first grid lines, the1Is the maximum length of the first grid lineD is described1Is the width of the first gate line, s2For the length of the second cell piece in the second direction, v2Is the distance between two adjacent second grid lines, the2Is the length of the second gate line, d2Is the width of the second gate line,/3Is the minimum length of the first grid line, the4Is the width of the auxiliary electrode in the first direction.
According to the utility model discloses battery piece, satisfy when making battery piece be single crystal battery piece
And when the cell piece is a polycrystalline cell piece
The total light blocking area of each second battery piece is equal to the total light blocking area of the first battery piece, so that when the areas of the second battery pieces are equal to the areas of the first battery pieces, the current flowing through the second battery pieces can be equal to the current flowing through the first battery pieces, and mismatch is avoided.
According to some embodiments of the invention, d1、d2Satisfies the following conditions: d1＜d2。
According to some embodiments of the invention, d1、d2Respectively satisfy: d is not less than 0.05mm1≤0.2mm，0.05mm≤d2≤0.2mm。
According to some embodiments of the invention, v1、v2Satisfies the following conditions: v. of1＞v2。
According to some embodiments of the invention, v1、v2Respectively satisfy: v is not less than 0.1mm1≤2mm，0.1mm≤v2≤2mm。
According to some embodiments of the invention, s1、s2Satisfies the following conditions: s1＝s2。
According to some embodiments of the utility model, it is a plurality of the sub battery piece is followed first direction overlap joint in proper order.
According to the utility model discloses battery cluster of second aspect embodiment, include: a plurality of battery pieces, it is a plurality of battery piece series connection, every the battery piece is according to the utility model discloses the battery piece of above-mentioned first aspect embodiment.
According to the utility model discloses battery unit of third aspect embodiment, include according to the utility model discloses the battery cluster of above-mentioned second aspect embodiment.
According to the utility model discloses photovoltaic module of fourth aspect embodiment, include according to the utility model discloses the battery unit of above-mentioned third aspect embodiment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of the battery cell shown in FIG. 1;
FIG. 3 is a schematic diagram of a second cell piece of the cell pieces shown in FIG. 1;
FIG. 4 is a schematic diagram of a first cell piece of the cell pieces shown in FIG. 1;
fig. 5 is an enlarged view of a portion a circled in fig. 4.
Reference numerals:
100: a battery piece;
1: a sub-cell sheet; 11: a first cell piece;
111: a first gate line; 112: an auxiliary electrode;
12: a second cell piece; 121: a second gate line.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
A battery sheet 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 5.
As shown in fig. 1 and fig. 2, a battery sheet 100 according to an embodiment of the first aspect of the present invention includes a plurality of sub-battery sheets 1. In the description of the present invention, "a plurality" means two or more.
Specifically, the plurality of sub-battery pieces 1 are sequentially arranged along a first direction, the plurality of sub-battery pieces 1 include a first battery piece 11 and a plurality of second battery pieces 12, the plurality of second battery pieces 12 are sequentially arranged along a direction away from the first battery piece 11 along a direction in the first direction, the first battery piece 11 is provided with a plurality of first grid lines 111 arranged at intervals along a second direction, each second battery piece 12 is provided with a plurality of second grid lines 121 arranged at intervals along the second direction, the second direction is perpendicular to the first direction, and the back of the first battery piece 11 is provided with at least one auxiliary electrode 112.
When the battery piece 100 is a single crystal battery piece, the first battery piece 11 and the second battery piece 12 satisfy:
when the battery piece 100 is a polycrystalline battery piece, the second battery piece 12 and the first battery piece 11 satisfy:
wherein s is1Is the length of the first cell piece 11 in the second direction, v1Is the distance between two adjacent first gate lines 111,/1Is the maximum length of the first gate line 111, d1Is the width of the first gate line 111, s2Is the length of the second cell piece 12 in the second direction, v2Is the distance between two adjacent second gate lines 121,/2Is the length of the second gate line 121, d2Is the width of the second gate line 121,/3Is the minimum length of the first gate line 111,l4is the width of the auxiliary electrode 112 in the first direction.
For example, in the example of fig. 1 and 2, the first direction is the up-down direction in fig. 1, and the second direction is the left-right direction in fig. 1. The cell sheet 100 includes six sub-cell sheets 1, and the six sub-cell sheets 1 are sequentially arranged in the first direction. The six sub-battery pieces 1 comprise first battery pieces 11 and five second battery pieces 12, the first battery pieces 11 are located at the lower ends of the second battery pieces 12, and the five second battery pieces 12 are sequentially arranged from bottom to top. A plurality of first grid lines 111 are arranged on the first battery piece 11, the plurality of first grid lines 111 are arranged at intervals along the second direction, the auxiliary electrode 112 is arranged on the back of the first battery piece 11, and the plurality of first grid lines 111 and the auxiliary electrode 112 can block light rays of the first battery piece 11. Each second cell 12 is provided with a plurality of second grid lines 121, the plurality of second grid lines 121 are arranged at intervals along the second direction, and the plurality of second grid lines 121 can block light rays of the second cell 12. Thus, when the cell sheet 100 is a single crystal cell sheet, the following conditions are satisfied
When the battery piece 100 is a polycrystalline battery piece
The total light blocking area of each first battery piece 11 is equal to the total light blocking area of the second battery piece 12, so that when the areas of the first battery piece 11 and the second battery piece 12 are equal, the currents flowing through the first battery piece 11 and the second battery piece 12 can be guaranteed to be equal, and mismatch is avoided.
When the cell piece 100 is a single crystal cell piece, the above formula means that the light-shielding area of the second cell piece 12 that is not chamfered is equal to the light-shielding area of the first cell piece 11. The influence of the chamfered portion on the light shielding area of the second cell 12 is small and negligible. That is, the light-shielding areas of the chamfered second cell 12 and the non-chamfered second cell 12 are substantially equal, and the chamfered second cell 12 may also be applied to the above formula.
Six sub-battery pieces 1 are shown in fig. 1 for illustrative purposes, but it is obvious to those skilled in the art after reading the technical solution of the present application that the solution can be applied to other numbers of sub-battery pieces 1, which also falls within the protection scope of the present invention.
According to the embodiment of the present invention, when the battery piece 100 is a single crystal battery piece, the battery piece 100 satisfies
And when the cell sheet 100 is a polycrystalline cell sheet
The total light blocking area of each second cell 12 is equal to the total light blocking area of the first cell 11, so that when the areas of the second cell 12 and the first cell 11 are equal, the currents flowing through the second cell 12 and the first cell 11 can be guaranteed to be equal, and mismatch is avoided.
In some embodiments of the present invention, combining fig. 1 and fig. 2, d1、d2Satisfies the following conditions: d1＜d2. Therefore, the width of the first grid line 111 is smaller than that of the second grid line 121, so that the shading areas of the first battery piece 11 and the second battery piece 12 are further ensured to be equal, and the mismatch problem is avoided.
Alternatively, referring to fig. 3-5, d1、d2Respectively satisfy: d is not less than 0.05mm1≤0.2mm，0.05mm≤d2Less than or equal to 0.2 mm. With the arrangement, when the shading areas of the first battery piece 11 and the second battery piece 12 are equal, the battery piece 100 can be ensured to have higher photoelectric conversion efficiency, and the electrical performance of the battery piece 100 can be improved.
Optionally, in conjunction with FIGS. 3-5, v1、v2Satisfies the following conditions: v. of1＞v2. Therefore, since at least one auxiliary electrode 112 is disposed on the back surface of the first cell 11, the auxiliary electrode 112 can block light by making the distance v between two adjacent first grid lines 1111Is greater than the distance v between two adjacent second gate lines 1212The first grid line 111 is arranged on the light blocking surface of the first cell 11The area of being less than the light blocking area of the second grid line 121 on the second cell piece 12, so that each of the first cell piece 11 and the second cell piece 12 can be uniformly shielded, and the mismatch problem can be prevented.
Alternatively, referring to fig. 3-5, v1、v2Respectively satisfy: v is not less than 0.1mm1≤2mm，0.1mm≤v2Less than or equal to 2 mm. With the arrangement, the photoelectric conversion efficiency of the cell 100 is further ensured, and the cell 100 has excellent electrical performance.
Further, as shown in FIGS. 1 and 2, s1、s2Satisfies the following conditions: s1＝s2. Therefore, the structure is simple, and the second battery piece 12 and the first battery piece 11 are convenient to process.
In some embodiments of the present invention, the plurality of sub-battery pieces 1 are sequentially connected in an overlapping manner along the first direction. For example, in the example of fig. 1, six sub-battery sheets 1 are shown, electrodes may be disposed at long edges of the six sub-battery sheets 1, and then the edges of two adjacent sub-battery sheets 1 are lap-jointed, so that the six sub-battery sheets 1 are arranged in a shingled manner. Wherein, the lap joint of two adjacent sub-battery pieces 1 can be coated with conductive adhesive for connection. With the arrangement, more sub-battery plates 1 can be stacked in unit area, and the power generation power and the stability of the battery plate 100 are improved.
According to the present invention, the battery string (not shown) includes a plurality of battery pieces 100, the plurality of battery pieces 100 are connected in series, and each battery piece 100 is the battery piece 100 according to the above-mentioned embodiment of the first aspect of the present invention. For example, the ends of two adjacent battery pieces 100 may be connected by conductive adhesive, and the plurality of battery pieces 100 are arranged in a shingled manner.
According to the utility model discloses battery cluster, through making a plurality of above-mentioned battery pieces 100 series connection, a plurality of sub-battery pieces 1's in every battery piece 100 light leak area equals to make the total output power of battery cluster equal with the sum of every battery piece 100's output, avoid appearing the mismatch.
According to a third aspect of the present invention, a battery unit (not shown) includes a battery string according to the second aspect of the present invention.
According to the utility model discloses battery unit, through adopting foretell battery cluster, guaranteed battery unit's generated power, prevent to produce the mismatch.
According to a fourth aspect of the present invention, a photovoltaic module (not shown) comprises a battery unit according to the above third aspect of the present invention.
According to the utility model discloses photovoltaic module, through adopting foretell battery cell, can improve photovoltaic module's photoelectric conversion efficiency, make photovoltaic module have great output.
Other constructions and operations of photovoltaic modules according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the drawings, and are only for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery cell, comprising:
the plurality of sub-battery pieces are sequentially arranged along a first direction, the plurality of sub-battery pieces comprise a first battery piece and a plurality of second battery pieces, the plurality of second battery pieces are sequentially arranged along the direction far away from the first battery piece along the first direction, the first battery piece is provided with a plurality of first grid lines arranged at intervals along a second direction, each second battery piece is provided with a plurality of second grid lines arranged at intervals along the second direction, the second direction is vertical to the first direction, the back of the first battery piece is provided with at least one auxiliary electrode,
when the cell is a single crystal cell, the first cell and the second cell satisfy:
when the battery piece is a polycrystalline battery piece, the second battery piece and the first battery piece meet the following conditions:
wherein, said s1For the length of the first cell piece in the second direction, v1Is the distance between two adjacent first grid lines, the1Is the maximum length of the first grid line, d1Is the width of the first gate line, s2Is the second batteryThe length of the sheet in the second direction, said v2Is the distance between two adjacent second grid lines, the2Is the length of the second gate line, d2Is the width of the second gate line,/3Is the minimum length of the first grid line, the4Is the width of the auxiliary electrode in the first direction.
2. The battery piece as recited in claim 1, wherein d is1、d2Satisfies the following conditions: d1＜d2。
3. The battery piece as recited in claim 1, wherein d is1、d2Respectively satisfy: d is not less than 0.05mm1≤0.2mm，0.05mm≤d2≤0.2mm。
4. The battery piece of claim 1, wherein v is1、v2Satisfies the following conditions: v. of1＞v2。
5. The battery piece of claim 1, wherein v is1、v2Respectively satisfy: v is not less than 0.1mm1≤2mm，0.1mm≤v2≤2mm。
6. The battery cell as recited in claim 1 wherein s is1、s2Satisfies the following conditions: s1＝s2。
7. The battery piece according to any one of claims 1-6, wherein a plurality of the sub-battery pieces are sequentially connected in an overlapping manner along the first direction.
8. A battery string, comprising:
a plurality of battery pieces, a plurality of the battery pieces being connected in series, each of the battery pieces being a battery piece according to any one of claims 1 to 7.
9. A battery cell comprising the battery string according to claim 8.
10. A photovoltaic module comprising a battery cell according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922203101.XU CN210926032U (en) | 2019-12-10 | 2019-12-10 | Battery piece and battery cluster, battery unit and photovoltaic module that have it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922203101.XU CN210926032U (en) | 2019-12-10 | 2019-12-10 | Battery piece and battery cluster, battery unit and photovoltaic module that have it |
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| Publication Number | Publication Date |
|---|---|
| CN210926032U true CN210926032U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922203101.XU Active CN210926032U (en) | 2019-12-10 | 2019-12-10 | Battery piece and battery cluster, battery unit and photovoltaic module that have it |
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| CN (1) | CN210926032U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151632A (en) * | 2020-10-16 | 2020-12-29 | 晶澳（扬州）太阳能科技有限公司 | Photovoltaic module |
| CN113964227A (en) * | 2020-07-21 | 2022-01-21 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
-
2019
- 2019-12-10 CN CN201922203101.XU patent/CN210926032U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964227A (en) * | 2020-07-21 | 2022-01-21 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
| CN112151632A (en) * | 2020-10-16 | 2020-12-29 | 晶澳（扬州）太阳能科技有限公司 | Photovoltaic module |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. |