CN217904352U

CN217904352U - Junction box, shunt connector and photovoltaic module

Info

Publication number: CN217904352U
Application number: CN202123397714.5U
Authority: CN
Inventors: 许建明
Original assignee: Changshu Friends Connector Technology Co ltd
Current assignee: Changshu Friends Connector Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-11-25
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a junction box, including a junction box casing, be provided with left side binding post, middle binding post and right side binding post in the junction box casing, left side binding post with be connected with first diode between the middle binding post, middle binding post with be connected with the second diode between the binding post of right side. Three middle junction box convergence belts are led out from the junction box shell, and the inside of each of the three middle junction box convergence belts is connected with the left-side wiring terminal, the middle wiring terminal and the right-side wiring terminal respectively. The utility model discloses divide into two strands with the rated current in the terminal box, each return circuit only need bear the 1/2 of primary current, and the diode performance requirement directly reduces a lot like this, can utilize original diode, need not select higher-end diode, and the cost can reduce a lot, because conventional diode has used many years in addition, the reliability can be guaranteed, has avoided some potential risks.

Description

Junction box, shunt connector and photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic module, particularly, relate to a terminal box and relevant reposition of redundant personnel connector thereof.

Background

The power of the existing photovoltaic module is larger and larger, the rated current of the corresponding junction box is also larger and larger, the requirement of rated current lifting is hardly met by the conventional junction box, the potential safety hazard caused by large current is larger, particularly, the middle box body of the three-way lifting junction box is provided with wires at two ends, heat can be assisted to be radiated, only the conductor is used for radiating, the heat radiating capacity is poorer, the mode of directly lifting the rated current of the junction box in the traditional mode is mainly realized by a diode with higher service performance, but the cost increase of the high-end diode is huge, the capacity is limited, the production requirement of the whole industry cannot be met, and the reliability needs to be further verified because the application time is short.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a junction box, two loops are formed in the junction box, the current generated during the operation of the junction box is divided into two parts, and each diode only needs to bear 1/2 of the current.

In order to realize the purpose, the utility model adopts the following technical scheme:

a junction box comprises a junction box shell, wherein a left side wiring terminal, a middle wiring terminal and a right side wiring terminal are arranged in the junction box shell, a first diode is connected between the left side wiring terminal and the middle wiring terminal, and a second diode is connected between the middle wiring terminal and the right side wiring terminal. Three middle junction box bus bars are led out from the junction box shell, and the three middle junction box bus bars are internally connected with the left side wiring terminal, the middle wiring terminal and the right side wiring terminal respectively.

A shunt power connector comprising the junction box.

A photovoltaic module comprising the shunt power connector.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses divide into two strands with the rated current in the terminal box, each return circuit only need bear the 1/2 of primary current, and the diode performance requirement directly reduces a lot like this, can utilize original diode, need not select higher-end diode, and the cost can reduce a lot, because conventional diode has used many years in addition, the reliability can be guaranteed, has avoided some potential risks.

Drawings

Fig. 1 is a schematic view (front view) of the junction box structure of the present invention.

Fig. 2 is a schematic view (rear view) of the junction box structure of the present invention.

Fig. 3 is a schematic structural diagram of the shunt connector of the present invention.

Fig. 4 is a schematic circuit diagram of the photovoltaic module of the present invention.

Fig. 5 is a comparison chart of the test data of the conventional junction box and the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated 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.

Example 1:

referring to fig. 1 and 2, a junction box includes a junction box housing 3, and is characterized in that: the junction box is characterized in that a left wiring terminal 301, a middle wiring terminal 302 and a right wiring terminal 303 are arranged in the junction box shell 3, a first diode 4 is connected between the left wiring terminal 301 and the middle wiring terminal 302, and a second diode 5 is connected between the middle wiring terminal 302 and the right wiring terminal 303.

Furthermore, three middle junction box bus bars 304 are led out from the junction box housing 3, and the three middle junction box bus bars 304 are connected with the left connection terminal 301, the middle connection terminal 302 and the right connection terminal 303 respectively.

Example 2:

referring to fig. 3, a shunt connector includes the junction box of embodiment 1, and further includes a first junction box 1 and a second junction box 2.

Further, a negative terminal box first terminal 101 and a negative terminal box second terminal 102 are arranged in the first terminal box 1, and a negative terminal box diode 103 is connected between the negative terminal box first terminal 101 and the negative terminal box second terminal 102; two negative terminal box converging belts are led out of the first terminal box 1, and the two negative terminal box converging belts are internally connected with the negative terminal box first wiring terminal 101 and the negative terminal box second wiring terminal 102 respectively.

Further, a first positive terminal box connecting terminal 201 and a second positive terminal box connecting terminal 202 are arranged in the second terminal box 2, and a positive terminal box diode 203 is connected between the first positive terminal box connecting terminal 201 and the second positive terminal box connecting terminal 202; two positive terminal box converging belts are led out of the second terminal box 2, and the two positive terminal box converging belts are internally connected with the positive terminal box first connecting terminal 201 and the positive terminal box second connecting terminal 202 respectively.

Example 3:

referring to fig. 4, a photovoltaic module comprising the shunt connector of embodiment 2; also includes a first battery string 6, a second battery string 7, and a third battery string 8; the first battery string 6 is connected to the first junction box 1, the second battery string 7 is connected to the junction box, and the third battery string 8 is connected to the second junction box 2.

Referring to fig. 5, from the test data, the use of 30SQ045 diodes has been shown to be superior in testing to the use of 40SQ045 diodes in conventional terminal blocks.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions on some technical features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A terminal block comprising a terminal block housing (3), characterized in that: be provided with left side binding post (301), middle binding post (302) and right side binding post (303) in terminal box casing (3), left side binding post (301) with be connected with first diode (4) between middle binding post (302), middle binding post (302) with be connected with second diode (5) between right side binding post (303).

2. The junction box of claim 1, wherein: three middle junction box bus bars (304) are led out of the junction box shell (3), and the three middle junction box bus bars (304) are internally connected with the left connecting terminal (301), the middle connecting terminal (302) and the right connecting terminal (303) respectively.

3. A shunt connector, comprising: comprising the terminal block of claim 2.

4. The shunt power connector of claim 3 wherein: the connector also comprises a first junction box (1) and a second junction box (2).

5. The shunt power connector of claim 4 wherein: a negative terminal box first wiring terminal (101) and a negative terminal box second wiring terminal (102) are arranged in the first terminal box (1), and a negative terminal box diode (103) is connected between the negative terminal box first wiring terminal (101) and the negative terminal box second wiring terminal (102); two negative terminal box converging belts are led out of the first terminal box (1), and the insides of the two negative terminal box converging belts are respectively connected with the negative terminal box first wiring terminal (101) and the negative terminal box second wiring terminal (102).

6. The shunt power connector of claim 5 wherein: a first positive terminal box connecting terminal (201) and a second positive terminal box connecting terminal (202) are arranged in the second terminal box (2), and a positive terminal box diode (203) is connected between the first positive terminal box connecting terminal (201) and the second positive terminal box connecting terminal (202); two positive terminal box converging belts are led out of the second terminal box (2), and the two positive terminal box converging belts are internally connected with the positive terminal box first connecting terminal (201) and the positive terminal box second connecting terminal (202) respectively.

7. A photovoltaic module, characterized by: comprising a shunt power connector according to claim 6.

8. The photovoltaic module of claim 7, wherein: the battery pack further comprises a first battery pack string (6), a second battery pack string (7) and a third battery pack string (8); the first battery pack string (6) is connected into the first junction box (1), the second battery pack string (7) is connected into the junction box, and the third battery pack string (8) is connected into the second junction box (2).