CN114388635A - A battery with reduced silver consumption - Google Patents

Abstract

The invention discloses a battery piece for reducing silver consumption. The auxiliary grid line is a plurality of, and a plurality of auxiliary grid line intervals set up, and auxiliary grid line and main grid line are the contained angle setting, and a plurality of pad point are listed as interval distribution, and every pad point is listed as including a plurality of pad points that set up along the length direction interval of main grid line, all is equipped with hollow out construction on every pad point. At least one pad dot row and the main grid line are arranged at intervals. The battery piece capable of reducing silver consumption can realize larger energy efficiency by adopting a small number of main grid lines, and reduces the silver consumption of the battery piece, thereby reducing the manufacturing cost of the battery piece.

Description

A battery with reduced silver consumption

technical field

The present invention relates to the technical field of battery equipment, in particular to a battery sheet with reduced silver consumption.

Background technique

At present, photovoltaic cells are basically designed with a multi-busbar structure to improve the power of cells and modules. The busbar structure of a multi-busbar battery is generally composed of pad points and busbar lines between pad points. The main function of the busbar line is to replace the solder ribbon during battery testing, and play the role of the fine grid converging to the probe row. The function of the pad point is mainly to fix the welding strip after welding, and to resist the thermal cycle test stress during the long-term aging process. However, with the increase of the number of busbar structures, the number of busbar lines and pad points also increases, so that the silver consumption of the busbar structure also increases, which limits the way to improve the efficiency of photovoltaic cells to a certain extent. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a battery with reduced silver consumption, which can achieve greater energy efficiency by using a smaller number of busbars, reduce the silver consumption of the battery, and thus reduce the manufacturing cost of the battery.

For realizing above-mentioned technical effect, technical scheme of the present invention is as follows:

The invention discloses a battery sheet for reducing silver consumption, comprising: at least one main grid line, at least one auxiliary grid line; multiple auxiliary grid lines, and the plurality of auxiliary grid lines are arranged at intervals , the auxiliary grid line and the main grid line are arranged at an included angle; the pad dot column, a plurality of the pad dot columns are distributed at intervals, each of the pad dot columns includes a plurality of pad dots arranged at intervals, and each pad dot column is arranged at an angle. The pad dots are all provided with hollow structures, wherein: at least one of the pad dot rows is spaced from the busbar.

In some embodiments, the pad point includes a plurality of strip-shaped structures arranged at intervals, and the spaced grooves between two adjacent strip-shaped structures constitute the hollow structure.

In some specific embodiments, the width of the spacing groove is D1, and D1 satisfies the relationship: 20um<D1<200um.

In some embodiments, the pad point includes a body, and the body is provided with a hollow slot.

In some specific embodiments, there are a plurality of the hollowed-out grooves, and the plurality of the hollowed-out grooves are arranged in multiple rows and multiple columns or in a circular array.

In some specific embodiments, the thickness of the body is H1, the depth of the hollow groove is H2, and H1 and H2 satisfy the relationship: H1=H2.

In some embodiments, the pad point includes a body, and the body is provided with a plurality of through holes, and the plurality of the through holes are arranged in multiple rows and columns or in a circular array.

In some embodiments, multiple pad points in the same pad point column have different size specifications.

In some specific embodiments, the size specifications of a plurality of the pad points in the same pad point column gradually decrease from the two ends to the middle.

In some embodiments, the busbar lines are discontinuous lines.

The beneficial effects of the battery sheet for reducing silver consumption of the present invention: because the pad point has a hollow structure, and the pad point can not only be arranged at the intersection of the main grid line and the auxiliary grid line, but also can be arranged on the auxiliary grid line and is connected with the main grid line. The grid lines are spaced apart, and on the premise of ensuring the string welding accuracy, string welding strength and cell energy efficiency, the number of busbar lines is reduced, the silver consumption of pad points is reduced, and the manufacturing cost of cells is reduced.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

1 is a schematic structural diagram of a battery sheet for reducing silver consumption according to an embodiment of the present invention;

2 is a schematic structural diagram of a first pad point of a battery sheet for reducing silver consumption according to an embodiment of the present invention;

3 is a schematic structural diagram of a second pad point of a battery sheet for reducing silver consumption according to an embodiment of the present invention;

4 is a schematic structural diagram of a third pad point of a battery sheet for reducing silver consumption according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of welding a pad point and a welding ribbon of a battery sheet for reducing silver consumption according to an embodiment of the present invention;

6 is a schematic structural diagram of another battery sheet for reducing silver consumption according to an embodiment of the present invention.

Reference number:

1. Main grid line; 2. Auxiliary grid line; 3. Pad point; 31. Strip structure; 311, spacing slot; 32, body; 321, hollow slot; 322, perforation;

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, regardless of order or importance. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The specific structure of the battery sheet for reducing silver consumption according to the embodiment of the present invention will be described below with reference to FIG. 1 to FIG. 6 .

The present invention discloses a battery sheet for reducing silver consumption. As shown in Figures 1 and 6 , the battery sheet for reducing silver consumption includes a main grid line 1, an auxiliary grid line 2 and a pad dot column, and the main grid line 1 is at least One, there are multiple auxiliary grid lines 2, the plurality of auxiliary grid lines 2 are arranged at intervals, the auxiliary grid lines 2 are arranged at an angle with the main grid line 1, the plurality of pad dot columns are distributed at intervals, and each pad dot column includes a plurality of intervals For the set pad points 3 , each pad point 3 is provided with a hollow structure, and at least one pad point column is spaced from the busbar 1 .

It can be understood that, compared with the prior art, the pad point 3 can only be set at the intersection of the main grid line 1 and the auxiliary grid line 2, and at least one pad column of the pad point 3 of the battery sheet in this embodiment is the same as the The busbar lines 1 are arranged at intervals. Therefore, under the condition that the number of pad points 3 is the same, the battery sheet of this embodiment has fewer busbar lines 1 , and the number of busbar lines 1 of this embodiment can be half of the number in the prior art Even 1/n (n is the number of busbar lines 1 in the prior art). It should be noted that, since the pad point 3 can be directly set on the auxiliary grid line 2, after the battery is welded with the ribbon 100, the current can flow from the main grid 1 to the ribbon 100, or from the auxiliary grid 2 to the ribbon 100. The ribbon 100, although the number of busbars 1 is small, does not cause additional current consumption. At the same time, although there is a hollow structure on the pad point 3, the overall size has not changed, so the precision of the string welding will not be affected. In addition, due to the addition of a hollow structure, the solder is melted and filled in the hollow structure, which can also provide side welding force, which is helpful to the welding tension to a certain extent, thereby improving the connection stability between the welding ribbon 100 and the battery.

To sum up, in the battery sheet of this embodiment, since the pad point 3 has a hollow structure, and the pad point 3 can be arranged not only on the intersection of the main grid line 1 and the auxiliary grid line 2, but also on the auxiliary grid line 2 On the premise of ensuring the string welding accuracy, string welding strength and cell energy efficiency, the number of busbar lines 1 is reduced, the silver consumption of pad point 3 is reduced, and the battery manufacturing cost of the sheet.

What needs to be added is that with the reduction of the diameter of the ribbon 100, the modulus of the ribbon 100, and the further reduction of the soldering temperature, the hollowing ratio of the pad point 3 can be further increased, so as to gradually realize the design without busbar 1, and only keep two tests. The test grid line can be used, thereby greatly reducing the silver consumption of the battery.

In some embodiments, as shown in FIG. 2 , the pad point 3 includes a plurality of strip-shaped structures arranged at intervals, and the spacing grooves 311 between two adjacent strip-shaped structures constitute a hollow structure. It can be understood that the pad point 3 is formed into a plurality of strip-shaped structures arranged at intervals. On the one hand, the silver consumption of the pad point 3 is reduced, and on the other hand, it is beneficial to fill the solder in the hollow structure and improve the connection between the battery and the solder ribbon 100 . Welding stability.

In some specific embodiments, the width of the spacing groove 311 is D1, and D1 satisfies the relationship: 20um<D1<200um. It can be understood that if the width of the spacing groove 311 is too large or too small, normal welding will be affected. In this implementation In the example, the width of the interval groove 311 is controlled between 20um and 200um, which can not only control the silver consumption of the pad point 3 but also ensure the welding stability of the battery sheet and the welding strip 100 . Of course, in other embodiments of the present invention, the width D1 of the spacing groove 311 can also be selected from other ranges according to actual needs, and is not limited to the above range.

In some embodiments, as shown in FIG. 3 , the pad point 3 includes a body 32 , and the body 32 is provided with a hollow slot 321 . It can be understood that, compared with the fact that the pad point 3 includes a plurality of strip-shaped structures arranged at intervals, the hollow groove 321 is directly arranged on the body 32, which facilitates the pick and place of the pad point 3, and thus facilitates the pad point 3 and the welding tape 100. welding.

In some specific embodiments, as shown in FIG. 3 , there are a plurality of hollow grooves 321 , and the plurality of hollow grooves 321 are arranged in multiple rows and columns or in a circular array. In this way, the silver consumption of the pad point 3 can be controlled, and the welding stability of the battery sheet and the solder ribbon 100 can be ensured.

In some specific embodiments, the thickness of the body 32 is H1, the depth of the hollow groove 321 is H2, and H1 and H2 satisfy the relationship: H1=H2.

In some embodiments, as shown in FIG. 4 , the pad point 3 includes a body 32 . The body 32 is provided with a plurality of through holes 322 , and the plurality of through holes 322 are arranged in multiple rows and columns or in a circular array. In this way, the silver consumption of the pad point 3 can be controlled, and the welding stability of the battery sheet and the solder ribbon 100 can be ensured. Compared with the hollow slot 321 , the processing of the through hole 322 is simpler, which simplifies the processing of the pad point 3 .

It should be supplemented here that, in this embodiment, the cross section of the through hole 322 is any one of a rectangle, a circle, a triangle, an ellipse, an oval, and other irregular shapes, and the shape of the cross section of the through hole 322 It can be selected according to actual needs, and the shape of the through hole 322 is not specifically limited here.

In some embodiments, multiple pad points 3 in the same pad point column have different size specifications. In this way, the size of the pad point 3 can be modified according to actual welding needs, so as to ensure that the pad point 3 can have a relatively suitable size for welding.

In some specific embodiments, the size specifications of the plurality of pad points 3 in the same pad point column gradually decrease from the two ends to the middle. It can be understood that, compared with the middle, the two ends of the welding strip 100 are more prone to the phenomenon of reliability de-soldering. The larger size of the pad points 3 at both ends can ensure the welding firmness with the two ends of the welding strip 100, thereby improving the welding performance. The connection stability between the ribbon 100 and the battery sheet.

In some embodiments, as shown in FIG. 6 , the busbar line 1 is a discontinuous line. In this way, the silver consumption of the busbar 1 can be further reduced, thereby reducing the manufacturing cost of the cell.

Example:

The following describes a battery sheet according to a specific embodiment of the present invention with reference to FIG. 1 .

As shown in FIG. 1 , the battery sheet of this embodiment has three main grid lines 1 arranged at intervals, a plurality of auxiliary grid lines 2 arranged at intervals, and five pad dot columns, each pad dot column includes a plurality of along the main grid Pad point 3 set at intervals in the length direction of line 1. As shown in FIG. 2 , each pad point 3 includes a plurality of strip-shaped structures arranged at intervals.

It should be added that, as shown in FIGS. 3 to 4 , the pad point 3 of this embodiment may further include a body 32 , and the body 32 is provided with a plurality of hollow slots 321 or a plurality of through holes 322 are provided on the body 32 . As shown in FIG. 6 , the busbar line 1 in this embodiment may not be a continuous line, but a discontinuous line as shown in FIG. 6 .

In the description of this specification, description with reference to the terms "some embodiments", "other embodiments", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one implementation of the invention example or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above contents are only preferred embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. limits.

Claims (10)

1. a battery sheet that reduces silver consumption, is characterized in that, comprises: a busbar (1), the number of the busbar (1) is at least one; Auxiliary grid lines (2), there are a plurality of the auxiliary grid lines (2), the plurality of auxiliary grid lines (2) are arranged at intervals, and the auxiliary grid lines (2) and the main grid lines (1) are formed Angle setting; Pad point columns, a plurality of the pad point columns are distributed at intervals, each of the pad point columns includes a plurality of pad points (3) arranged at intervals, and each of the pad points (3) is provided with a hollow structure, wherein : at least one of the pad dot columns is spaced apart from the busbar line (1). 2. The battery sheet for reducing silver consumption according to claim 1, wherein the pad point (3) comprises a plurality of strip-shaped structures arranged at intervals, and the interval between two adjacent strip-shaped structures is The slot (311) constitutes the hollow structure. 3 . The battery sheet for reducing silver consumption according to claim 2 , wherein the width of the interval groove ( 311 ) is D1 , and D1 satisfies the relation: 20um<D1<200um. 4 . 4 . The battery sheet for reducing silver consumption according to claim 1 , wherein the pad point ( 3 ) comprises a main body ( 32 ), and the main body ( 32 ) is provided with a hollow slot ( 321 ). 5 . 5 . The battery sheet with reduced silver consumption according to claim 4 , wherein there are a plurality of hollow slots ( 321 ), and the plurality of hollow slots ( 321 ) are arranged in multiple rows and columns or a circular array. 6 . Arrange. 6. The battery sheet for reducing silver consumption according to claim 4, characterized in that, the thickness of the body (32) is H1, the depth of the hollow groove (321) is H2, and H1 and H2 satisfy the relationship: H1=H2. 7. The battery sheet for reducing silver consumption according to claim 1, wherein the pad point (3) comprises a main body (32), and the main body (32) is provided with a plurality of perforations (322), a plurality of The perforations (322) are arranged in multiple rows and columns or in a circular array. 8. The battery sheet for reducing silver consumption according to any one of claims 1 to 7, wherein a plurality of the pad points (3) in the same pad point row have different size specifications. 9 . The battery sheet for reducing silver consumption according to claim 8 , wherein the dimensions of the plurality of pad points ( 3 ) in the same pad point row gradually decrease from the two ends to the middle. 10 . 10. The battery sheet for reducing silver consumption according to any one of claims 1-7, characterized in that, the busbar (1) is a discontinuous line.

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