CN210780676U

CN210780676U - Modularization photovoltaic wiring subassembly, photovoltaic terminal box and photovoltaic module

Info

Publication number: CN210780676U
Application number: CN201922276391.0U
Authority: CN
Inventors: 张定忠; 许浩良; 涂阳; 郭浪
Original assignee: Changshu Telian Precision Devices Co ltd; CSI Solar Power Group Co Ltd
Current assignee: Changshu Telian Precision Devices Co ltd; Canadian Solar Inc
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-06-16
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a modularization photovoltaic wiring subassembly, photovoltaic terminal box and photovoltaic module, this modularization photovoltaic wiring subassembly include first frame, second frame and third frame, are equipped with first chip and first pad on the first frame, and first pad has first busbar hole, is equipped with second chip and second pad on the second frame, and the second pad has second busbar hole, is equipped with the third pad on the third frame, and the third pad has the third busbar hole. The first frame, the second frame and the third frame are arranged at intervals, and are separated from each other in a plastic package mode through the plastic package piece, the first chip is electrically connected with the third frame, and the second chip is electrically connected with the first frame. The modularized photovoltaic wiring component can reduce the probability of poor connection or other poor problems, and is simple in production process and relatively low in production cost.

Description

Modularization photovoltaic wiring subassembly, photovoltaic terminal box and photovoltaic module

Technical Field

The utility model relates to a photovoltaic cell technical field especially relates to a modularization photovoltaic wiring subassembly, photovoltaic terminal box and photovoltaic module.

Background

Conventional photovoltaic terminal box generally comprises three sub-terminal box, there are two diodes in every sub-terminal box, and every sub-terminal box connects photovoltaic module's battery cluster group that has two battery clusters, the spare part of sub-terminal box includes little buckle, the end is detained, the copper, the chip, the box body, lid and cable etc. are constituteed, copper and end are detained mutually independently, need adopt reflow soldering, technology such as cutting connects copper and end, reflow soldering technology probably causes the chip crooked, the skew, bad problem such as welding is not firm, cut the technology and can produce certain influence to the function of chip, probably lead to the chip to be shaken bad problem such as garrulous, thereby promote the risk that the product became invalid. In addition, the copper plates in all the areas are not physically cut off, so that the risk of short circuit in the bus bar welding process is increased.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a modularization photovoltaic wiring subassembly, this modularization photovoltaic wiring subassembly can reduce the probability of connecting harmfully or other bad problems to this modularization photovoltaic wiring subassembly's production technology is comparatively simple, and manufacturing cost is lower relatively.

A second object of the present invention is to provide a photovoltaic junction box, which has high reliability and long service life.

A third object of the present invention is to provide a photovoltaic module, which has high reliability and low failure rate.

For realizing the above technical effect, the technical scheme of the utility model as follows:

the utility model discloses a modularization photovoltaic wiring subassembly, include: the chip packaging structure comprises a first frame, a second frame and a third frame, wherein a first chip and a first bonding pad are arranged on the first frame, and the first bonding pad is provided with a first bus bar hole; the second frame is provided with a second chip and a second bonding pad, and the second bonding pad is provided with a second bus bar hole; a third frame, on which a third pad is provided, the third pad having a third bus bar hole: the first frame, the second frame and the third frame are arranged at intervals and are separated from each other by a plastic package piece in a plastic package mode, the first chip is electrically connected with the third frame, and the second chip is electrically connected with the first frame.

In some embodiments, the first bus bar hole, the second bus bar hole, and the third bus bar hole are bar-shaped holes, the first bus bar hole extends in a direction perpendicular to the second bus bar hole, and the second bus bar hole extends in a direction parallel to the third bus bar hole.

In some embodiments, the first frame comprises: the chip part is provided with the first chip, and the side edge of the chip part is arranged corresponding to the side edge of the third frame; the connecting part is connected to one side of the chip part, which is far away from the third frame, and the side edge of the connecting part reaches the side edge of the chip part, which is far away from the third frame, is respectively arranged corresponding to two adjacent side edges of the second frame.

In some specific embodiments, an end of the connecting portion away from the chip portion faces a connecting flange convexly provided on the second frame, and the connecting flange is electrically connected to the second chip.

In some embodiments, the first frame, the second frame, and the third frame are all copper frames.

In some embodiments, the first chip and the third frame and the second chip and the first frame are connected by jumpers.

In some embodiments, the molding member is an epoxy member or a silicone epoxy member.

The utility model also discloses a photovoltaic junction box, which comprises a plurality of the modularized photovoltaic wiring components, wherein one of the modularized photovoltaic wiring components is a positive plate, and the third frame of the positive plate is also connected with a positive wiring; the other modularization photovoltaic wiring subassembly is the negative plate, still be equipped with the negative pole wiring on the second frame of negative plate, all the other modularization photovoltaic wiring subassembly is the intermediate lamella.

The utility model also discloses a photovoltaic module, include: the battery string group is multiple and distributed at intervals, and each battery string group is provided with three outgoing lines; the photovoltaic junction box comprises a plurality of modularized photovoltaic wiring assemblies, and three outgoing lines of each battery string group are respectively matched with the first bus bar hole, the second bus bar hole and the third bus bar hole.

The utility model discloses modularization photovoltaic wiring subassembly owing to adopted first frame, second frame and third frame mutual independence and the three passes through the structure of plastic envelope spare isolation plastic envelope, has saved reflow soldering and the cutting process in the course of working, has reduced manufacturing cost, has promoted production efficiency, has stopped because the bad problem that reflow soldering and cutting process produced, has reduced modularization photovoltaic wiring subassembly's volume, is favorable to the miniaturized design of photovoltaic and terminal box.

The utility model discloses a photovoltaic terminal box owing to have at least three the foreland modularization photovoltaic wiring subassembly, has promoted photovoltaic terminal box reliability and life.

The utility model discloses a photovoltaic module owing to have the foretell photovoltaic terminal box, promoted photovoltaic module's reliability and life.

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

Fig. 1 is a schematic structural view of a modular photovoltaic wiring assembly according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a photovoltaic junction box according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a photovoltaic module according to an embodiment of the present invention.

Reference numerals:

1a, a first frame; 11a, a chip section; 12a, a connecting part; 121a, a connecting flange;

1b, a second frame;

1b, a third frame;

2a, a first chip; 2b, a second chip;

3a, a first pad; 31a, a first bus bar hole;

3b, a second bonding pad; 31b, a second bus bar hole;

3c, a third bonding pad; 31c, a third bus bar hole;

4. molding the part; 5. a jumper wire;

10. a positive plate; 101. a positive line; 20. a negative plate; 201. a negative electrode line; 30. a middle plate;

200. and (4) battery string groups.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

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", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of 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.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The specific structure of the modular photovoltaic wiring assembly of the embodiment of the present invention is described below with reference to fig. 1.

As shown in fig. 1, the modular photovoltaic wiring assembly of the present embodiment includes a first frame 1a, a second frame 1b, and a third frame 1c, a first chip 2a and a first pad 3a are provided on the first frame 1a, the first pad 3a has a first bus bar hole 31a, a second chip 2b and a second pad 3b are provided on the second frame 1b, the second pad 3b has a second bus bar hole 31b, a third pad is provided on the third frame 1c, and the third pad has a third bus bar hole 31 c. The first frame 1a, the second frame 1b and the third frame 1c are arranged at intervals, and are separated from each other in a plastic package mode through the plastic package piece 4, the first chip 2a is electrically connected with the third frame 1c, and the second chip 2b is electrically connected with the first frame 1 a.

It can be understood that, in this embodiment, the first frame 1a, the second frame 1b and the third frame 1c are independent of each other and are plastically packaged into a whole by the plastic package member 4, the first chip 2a on the first frame 1a is electrically connected with the third frame 1c, and the second chip 2b on the second frame 1b is electrically connected with the first frame 1a, so that the three frames are formed into three independent modules, a reflow soldering and cutting process is not needed in a production process, and a bad phenomenon caused by the reflow soldering and cutting process is avoided while the production cost is reduced. Meanwhile, the mutual independence of the three frames can also reduce the risk of short circuit caused by the inevitable processes such as overlong bus bars, welding deviation and multi-tin, so that the quality of the whole modularized photovoltaic wiring assembly is ensured. In addition, the plastic package structure of the three independent frames matched with the plastic package part 4 can reduce the volume of the whole modularized photovoltaic wiring assembly, so that the miniaturization design of the photovoltaic junction box is facilitated.

The utility model discloses modularization photovoltaic wiring subassembly, owing to adopted first frame 1a, second frame 1b and third frame 1c mutual independence and the three is through the structure of plastic envelope 4 isolation plastic envelope, save reflow soldering and the cutting process in the course of working, the manufacturing cost is reduced, the production efficiency is promoted, the bad problem because reflow soldering and cutting process produced has been stopped, the volume of modularization photovoltaic wiring subassembly has been reduced, be favorable to the miniaturized design of photovoltaic terminal box.

In some embodiments, the first bus bar hole 31a, the second bus bar hole 31b, and the third bus bar hole 31c are all bar-shaped holes, the extending direction of the first bus bar hole 31a is perpendicular to the extending direction of the second bus bar hole 31b, and the extending direction of the second bus bar hole 31b is parallel to the extending direction of the third bus bar hole 31 c. It can be understood that the first, second and third

bus bar holes

31a, 31b and 31c are formed in a delta arrangement, which facilitates to reduce the length dimension of the entire modular photovoltaic wiring assembly, thereby further reducing the volume of the entire photovoltaic junction box. Of course, it should be noted that, in other embodiments of the present invention, the first bus bar hole 31a, the second bus bar hole 31b, and the third bus bar hole 31c may be designed according to actual needs, and are not limited to the arrangement of the embodiment.

In some embodiments, the first frame 1a includes a chip portion 11a and a connecting portion 12a, the first chip 2a is disposed on the chip portion 11a, a side of the chip portion 11a is disposed corresponding to a side of the third frame 1c, the connecting portion 12a is connected to a side of the chip portion 11a away from the third frame 1c, and a side of the connecting portion 12a and a side of the chip portion 11a away from the third frame 1c are disposed corresponding to two adjacent sides of the second frame 1b, respectively. Therefore, the volume of the whole photovoltaic wiring assembly is reduced while the connection stability between the first chip 2a and the third frame 1c and the stability between the second chip 2b and the first frame 1a are better ensured.

In some specific embodiments, an end of the connecting portion 12a away from the chip portion 11a is protruded toward the connecting convex edge 121a of the second frame 1b, and the connecting convex edge 121a is electrically connected to the second chip 2 b. Therefore, the additional connecting flange 121a can ensure the stable connection between the second chip 2b and the connecting portion 12a, thereby ensuring the stable conduction between the first frame 1a and the second frame 1 b.

Here, it should be additionally noted that, when the first frame 1a, the second frame 1b, and the third frame 1c are actually designed, the shapes of the first frame 1a, the second frame 1b, and the third frame 1c may be selected according to actual needs, and are not limited to the above shapes.

In some embodiments, the first frame 1a, the second frame 1b, and the third frame 1c are all copper frames. Of course, in other embodiments of the present invention, the first frame 1a, the second frame 1b and the third frame 1c may also be made of other conductive materials

In some embodiments, the first chip 2a and the third frame 1c and the second chip 2b and the first frame 1a are connected by a jumper 5. Therefore, the connection between the first chip 2a and the third frame 1c and the connection between the second chip 2b and the first frame 1a are facilitated, the automatic production of the photovoltaic wiring assembly is facilitated, and the production efficiency is improved. Of course, in other embodiments of the present invention, other electrical connection methods may also be adopted between the first chip 2a and the third frame 1c and between the second chip 2b and the first frame 1a, and are not limited to the connection of the jumper 5 of this embodiment.

In some embodiments, the molding member 4 is an epoxy member or a silicone epoxy member. Of course, in other embodiments of the present invention, the plastic package member 4 can also be made of other plastic package materials.

Example (b):

a photovoltaic wiring assembly according to an embodiment of the present invention is described below with reference to fig. 1.

As shown in fig. 1, the modular photovoltaic wiring assembly of the present embodiment includes a first frame 1a, a second frame 1b, and a third frame 1 c. The first frame 1a includes a chip part 11a and a connection part 12a, the chip part 11a is provided with a first chip 2a and a first pad 3a, a side of the chip part 11a is disposed corresponding to a side of the third frame 1c, and the first pad 3a has a first bus bar hole 31 a. Connecting portion 12a is connected in the one side of keeping away from third frame 1c of chip portion 11a, the side of connecting portion 12a and the side of keeping away from third frame 1c of chip portion 11a correspond the setting with two adjacent sides of second frame 1b respectively, the one end of keeping away from chip portion 11a of connecting portion 12a is equipped with towards the protruding connection chimb 121a of establishing of second frame 1b, be equipped with second chip 2b and second pad 3b on the second frame 1b, second pad 3b has second busbar hole 31b, be equipped with the third pad on the third frame 1c, the third pad has third busbar hole 31 c: the first frame 1a, the second frame 1b and the third frame 1c are arranged at intervals and are plastically packaged by the plastic package part 4, the first chip 2a is electrically connected with the third frame 1c, and the second chip 2b is electrically connected with the first frame 1 a.

The photovoltaic wiring assembly of this embodiment has following advantage:

1. the plastic package part 4 is physically divided into the independent first frame 1a, the independent second frame 1b and the independent third frame 1c, so that the short circuit risk caused by the inevitable problems of welding offset, tin accumulation and the like is reduced;

2. in the production process, a reflow soldering process and a cutting process are omitted, the types of process procedures are reduced, the manufacturing cost is reduced, and the processing efficiency and the processing yield are improved;

3. the automatic production is facilitated, and the production efficiency is improved;

4. pockmark areas can be added on the first frame 1a, the second frame 1b and the third frame 1c, so that the solder paste can be conveniently loaded, and the processing efficiency is improved;

5. the process flow of cable resistance welding and tin paste application is facilitated.

The specific structure of the photovoltaic junction box according to the embodiment of the present invention is described below with reference to fig. 2.

As shown in fig. 2, the utility model also discloses a photovoltaic junction box, which comprises a plurality of modularized photovoltaic wiring components, wherein one of the modularized photovoltaic wiring components is a positive plate 10, and a positive wiring 101 is further connected to the third frame 1c of the positive plate 10; the other modularized photovoltaic wiring component is a negative plate 20, a negative wiring 201 is further arranged on the second frame 1b of the negative plate 20, and the rest modularized photovoltaic wiring components are intermediate plates 30.

It should be added that, in the actual use process, the positive electrode plate 10, the negative electrode plate 20 and the middle frame may be made into different shapes, so that the installation of the photovoltaic junction box is convenient for an operator to save the installation time.

The specific structure of the photovoltaic module according to the embodiment of the present invention is described below with reference to fig. 3.

As shown in fig. 3, the utility model also discloses a photovoltaic module, this photovoltaic module includes battery cluster 200 and photovoltaic terminal box, and battery cluster 200 is a plurality of and a plurality of battery cluster 200 interval distribution, and every battery cluster 200 all has three lead-out wires, and three lead-out wires of every battery cluster 200 cooperate with first busbar hole 31a, second busbar hole 31b and third busbar hole 31c respectively.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., 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 invention. In this specification, the schematic representations of the terms used above 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 description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A modular photovoltaic wiring assembly, comprising:

a first frame (1a), on which a first chip (2a) and a first pad (3a) are provided, the first pad (3a) having a first bus bar hole (31 a);

a second frame (1b), wherein a second chip (2b) and a second bonding pad (3b) are arranged on the second frame (1b), and the second bonding pad (3b) is provided with a second bus bar hole (31 b);

a third frame (1c), a third land (3c) provided on the third frame (1c), the third land (3c) having a third bus bar hole (31 c):

the first frame (1a), the second frame (1b) and the third frame (1c) are arranged at intervals, and are separated from each other in a plastic package mode through a plastic package piece (4), the first chip (2a) is electrically connected with the third frame (1c), and the second chip (2b) is electrically connected with the first frame (1 a).

2. The modular photovoltaic junction assembly of claim 1, characterized in that the first (31a), second (31b) and third (31c) bus bar apertures are all bar apertures, the first bus bar aperture (31a) extending in a direction perpendicular to the second bus bar aperture (31b), the second bus bar aperture (31b) extending in a direction parallel to the third bus bar aperture (31 c).

3. The modular photovoltaic junction assembly according to claim 1, characterized in that said first frame (1a) comprises:

the chip part (11a) is provided with the first chip (2a), and the side edge of the chip part (11a) is arranged corresponding to the side edge of the third frame (1 c);

the connecting part (12a) is connected to one side, far away from the third frame (1c), of the chip part (11a), the side of the connecting part (12a) and the side, far away from the third frame (1c), of the chip part (11a) are respectively and correspondingly arranged with two adjacent sides of the second frame (1 b).

4. The modular photovoltaic junction assembly according to claim 3, characterized in that an end of the connecting portion (12a) remote from the chip portion (11a) is convexly provided with a connecting flange (121a) towards the second frame (1b), the connecting flange (121a) being electrically connected with the second chip (2 b).

5. The modular photovoltaic junction assembly according to claim 1, characterized in that said first frame (1a), said second frame (1b) and said third frame (1c) are all copper frames.

6. The modular photovoltaic junction assembly according to claim 1, characterized in that jumper wires (5) are used both between the first chip (2a) and the third frame (1c) and between the second chip (2b) and the first frame (1 a).

7. The modular photovoltaic junction assembly of claim 1, characterized in that the plastic encapsulation (4) is an epoxy or silicone epoxy.

8. A photovoltaic junction box comprising a plurality of modular photovoltaic junction assemblies according to any one of claims 1 to 7, one of said modular photovoltaic junction assemblies being a positive plate (10), said third frame (1c) of said positive plate (10) having a positive connection (101) connected thereto; the other modularized photovoltaic wiring assembly is a negative plate (20), a negative wiring (201) is further arranged on the second frame (1b) of the negative plate (20), and the rest modularized photovoltaic wiring assemblies are all intermediate plates (30).

9. A photovoltaic module, comprising:

the battery string group (200) is multiple, the battery string groups (200) are distributed at intervals, and each battery string group (200) is provided with three outgoing lines;

the photovoltaic junction box as set forth in claim 8, three of said outgoing lines of each of said cell strings (200) being fitted with said first bus bar hole (31a), said second bus bar hole (31b), and said third bus bar hole (31c), respectively.