TWM642841U - Cable assembly and photovoltaic power optimizer - Google Patents

Abstract

This creation discloses a cable assembly and a photovoltaic power optimizer. The cable assembly includes a wire, a connection terminal and a protective cover. The wire includes a main wire body and a connection end. The end parts are matched and fixed by riveting, and the protective cover includes a first cover part, a second cover part and a third cover part, which are respectively set on the base part, the riveted connection part and the periphery of the main line body, and the butt joint part is at least partially connected to the Printed Circuit Board Assembly (PCBA). The cable assembly extends along a first direction on the PCBA and is arranged along a second direction. The projections of the butt joints of adjacent terminals in the second direction do not overlap. By covering the connection terminals and the connection between the connection terminals and the wires with insulating protective sleeves, and dislocating the connection terminals on the PCB, the risk of arcing between adjacent connection terminals can be prevented.

Description

Cable Assemblies and Photovoltaic Power Optimizers

This creation relates to the field of photovoltaic technology, in particular to a cable assembly and a photovoltaic power optimizer.

This creation claims the priority of the Chinese patent application with the filing date on December 09, 2022 and the application number: 202223318716.5, the entire contents of which are incorporated in this creation by reference.

With the development of human beings, global environmental energy has become the primary issue of human beings. The continuous deterioration of the environment comes from the excessive exploitation and waste of energy and the unenvironmental composition of energy itself. Therefore, it is urgent to change the current energy composition, and the active development and use of green and renewable energy has become the focus of our current development.

As one of the renewable energies, solar energy is the best choice for human beings at present no matter from the perspective of environmental protection or sustainable utilization, and has huge room for development. The photovoltaic power optimizer is used to solve the influence of photovoltaic power plants on power generation due to shadow shading, inconsistent orientation or differences in electrical specifications of components, so as to achieve the maximum power output of components and increase system power generation. Photovoltaic power optimizer is one of the key components in photovoltaic system components.

The cable assembly of the conventional photovoltaic power optimizer is usually connected to the circuit board through terminals, and there is a risk of arcing due to the small distance between the terminals, and even fire damage due to the arcing.

Therefore, it is necessary to provide a new cable assembly and photovoltaic power optimizer to solve this problem.

The purpose of this creation is to provide a cable assembly and a photovoltaic power optimizer, optimizing Simplify the assembly of cable assemblies and reduce the risk of arcing.

To achieve this purpose, this creation adopts the following technical solution: a cable assembly, suitable for connecting to a printed circuit board assembly, the cable assembly includes a wire and a terminal, the wire includes a main wire body and a terminal fixed at one end of the main wire body end, the connection terminal includes a base, a butt joint disposed at one end of the base, and a connection portion disposed at the other end of the base, the connection portion fits with the connection end and is fixed by riveting; the cable assembly also includes a protective cover , the protective sleeve includes a first sleeve portion, a second sleeve portion and a third sleeve portion, the first sleeve portion is sleeved on the periphery of the base, the second sleeve portion is sleeved on the connecting end portion and riveted by the wiring portion The periphery after pressing, the third sleeve part is sleeved on the periphery of the main line body; the butt joint part is at least partly butt jointed with the printed circuit board assembly, and the lateral sides of the butt joint part are provided with limit protrusions, and the limit protrusions abut against the printed circuit board assembly.

As a further improved technical solution of the invention, the butt joint part is bent downwards from one end of the base part, and the connection part is bent upwards from the other end of the base part.

As a technical solution for further improvement of this creation, the protective cover is made of insulating material and can be shrunk by heat.

To achieve this goal, this creation also adopts the following technical solutions: a photovoltaic power optimizer, including a printed circuit board assembly, a housing, and a plurality of cable assemblies as described in any one of the above; the printed circuit board assembly is installed in the housing In the body, the printed circuit board assembly includes a printed circuit board, and the printed circuit board is provided with a docking slot; the cable assembly is installed on the printed circuit board assembly, and the docking portion of the terminal in the cable assembly is at least partially docked in the docking slot In the middle; the cable assembly extends along a first direction and is arranged along a second direction, the first direction is perpendicular to the second direction, and the projections of the butt joint portions of the adjacent terminals on the second direction do not overlap.

As a further improved technical solution of the present invention, the casing includes a pressing block installation part, and the pressing block installation part includes an upper arc part; the photovoltaic power optimizer also includes a pressing block installed on the pressing block installation part, and the pressing block Including a lower arc portion, the lower arc portion corresponds to the upper arc portion and jointly forms a through hole, the guide in the cable assembly The main body of the wire extends along the first direction and passes through the through hole.

As a further improved technical solution of the invention, the printed circuit board has a first surface and a second surface, the limiting protrusion of the abutting portion has a first wall and a second wall, and the first wall abuts against the first surface.

As a further improved technical solution of the invention, the housing has an inner bottom wall, the inner bottom wall is provided with a positioning column, and the printed circuit board is correspondingly provided with a positioning hole, and the positioning column is adapted to the positioning hole.

As a technical solution for further improvement of the invention, the inner bottom wall is further provided with a buckle portion, and the corresponding position of the printed circuit board is provided with a recessed portion, and the buckle portion is fastened to the recessed portion.

As a further improved technical solution of the invention, it also includes an upper cover installed on the housing, the upper cover is provided with a first installation part, and the housing is correspondingly provided with a second installation part, and the first installation part and the second installation part adaptation.

As a further improved technical solution of the invention, the upper cover has an outer surface and an inner surface, the outer surface is provided with electrode marks, and the inner surface is provided with a pre-pressed boss.

Compared with the conventional technology, the beneficial effects of the cable assembly and the photovoltaic power optimizer of the present invention are: (1) by setting an insulating protective cover on the terminal and the connection between the terminal and the wire, and placing the terminal on the The misaligned arrangement on the printed circuit board can eliminate the risk of arcing due to the small distance between adjacent terminals, thereby avoiding the fire loss caused by the arc; (2) The terminal is soldered to the printed circuit board by plug-in welding , not only can be well connected with the printed circuit board assembly, but also reduce the cost; (3) the butt joint of the terminal is provided with a limit protrusion to ensure that the welding height of all the terminals is consistent; (4) the housing and the printed circuit board assembly The printed circuit board assembly is fixed in the housing through the cooperating installation of the positioning post and the positioning hole, the buckle part and the recessed part, which simplifies the conventional assembly method and reduces the cost; (5) the upper cover and the housing are installed by the first The first part is installed with the second installation part, and the upper cover is limited and fixed on the shell, which is beneficial to the overall sealing of the photovoltaic power optimizer; (6) The outer surface of the upper cover is equipped with electrode marks, which not only can identify the wiring electrodes more quickly and conveniently, but also facilitates production line production; (7) The inner surface of the upper cover is equipped with pre-pressed bosses. After the product is filled with glue, the shell can be The body is tightly pressed together with the glue-filled covering to avoid internal looseness and ensure airtightness.

10: Cable assembly

11: wire

111: main body

112: connection end

12: terminal block

121: base

122: docking part

1221: limit protrusion

1221a: first wall

1221b: second wall

1221c: Third Wall

123: Wiring part

13: Protective sleeve

131: The first set of department

132: The second part

133: The third part

20: Printed Circuit Board Assembly

21: Printed circuit board

21a: First side

21b: Second side

211: Docking slot

212: positioning hole

213: Depressed part

22: Electronic components

30: shell

30a: inner bottom wall

30b: outer bottom wall

31:Block installation part

311: upper arc

312: limit groove

32: positioning column

33: buckle part

331: Extension

332: Convex buckle

332a: fourth wall

332b: fifth wall

332c: Sixth Wall

34: The second installation part

35: hollow groove

36: sealing ring groove

37: water stop

38: Cooling plate installation groove

381: The first mounting hole

40: top cover

40a: outer surface

40b: inner surface

41: The first installation department

42: Electrode identification

43: Pre-press boss

50: Briquetting

51: lower arc

52: Through hole

53: limit bump

531: Groove

54: Glue feed tank

55: Ultrasonic welding wire

56: Buffer

60: thermal adhesive

70: insulating paper

80: cooling plate

81: Substrate

811: Positioning Department

82: Main cooling part

83: Cooperate with the installation department

84: Second mounting hole

90: Fasteners

A: The circled part in Figure 8

A-A,B-B,C-C,D-D,E-E,F-F: line

B: The circled part in Figure 10

C: The circled part in Figure 12

D: The circled part in Figure 16

E: The circled part in Figure 20

F: The circled part in Figure 26

G, H: circled part in Figure 30

L: length direction

W: width direction

Fig. 1 is a schematic structural diagram of a photovoltaic power optimizer of a specific embodiment of the invention; Fig. 2 is a schematic diagram of the exploded structure of Fig. 1; Fig. 3 is a schematic structural view of the upper cover of a specific embodiment of the invention; Fig. 4 is another embodiment of Fig. 3 Schematic diagram of the structure of the angle; Fig. 5 is a schematic diagram of the explosion structure of the cable assembly of a specific embodiment of the invention; Fig. 6 is a schematic diagram of the structure of the welding of the cable assembly and PCBA of a specific embodiment of the invention; Fig. 7 is the main body of Fig. 6 Figure 8 is a schematic diagram of the cross-sectional structure of Figure 7 along the direction of A-A; Figure 9 is a schematic diagram of the enlarged structure of the A region in Figure 8; Figure 10 is a schematic diagram of the cross-sectional structure of Figure 7 along the direction of B-B; Figure 11 is a schematic diagram of the B region in Figure 10 Fig. 12 is a three-dimensional schematic diagram of the housing of a specific embodiment of the invention; Fig. 13 is a schematic diagram of the enlarged structure of the C area in Fig. 12; Fig. 14 is the installation of the PCBA and the housing of a specific embodiment of the invention Figure 15 is a schematic diagram of the front view of Figure 14; Figure 16 is a schematic diagram of the cross-sectional structure of Figure 15 along the C-C direction; Figure 17 is a schematic diagram of the enlarged structure of the D area in Figure 16; Figure 18 is a specific embodiment of the invention Figure 19 is a schematic front view of Figure 18; Figure 20 is a schematic cross-sectional structure diagram of Figure 19 along the D-D direction; Figure 21 is a schematic diagram of an enlarged structure of the E area in Figure 20; Fig. 22 is a schematic structural view of a briquetting block according to a specific embodiment of the invention; Fig. 23 is a schematic front view of Fig. 22; Fig. 24 is a schematic right view of Fig. 22; Fig. 25 is a schematic bottom view of Fig. 18; Fig. 26 is a schematic view of Fig. 25 Schematic cross-sectional structure along the E-E direction; Figure 27 is a schematic diagram of the enlarged structure of the F area in Figure 26; Figure 28 is a schematic structural diagram of another angle in Figure 1; Figure 29 is a schematic front view of Figure 28; Figure 30 is a schematic diagram of Figure 29 along F-F direction; FIG. 31 is a schematic diagram of the enlarged structure of the region G in FIG. 30; FIG. 32 is a schematic diagram of the enlarged structure of the region H in FIG. 30.

An exemplary specific implementation manner of the invention will be described in detail below in conjunction with the drawings. If there are multiple specific implementations, the features in these implementations can be combined with each other under the condition of no conflict. When the description refers to drawings, unless otherwise stated, the same numerals in different drawings indicate the same or similar elements. The content described in the following exemplary embodiments does not represent all implementations consistent with this creation; rather, they are only consistent with some aspects of this creation described in the patent claims of this creation Examples of devices, products and/or methods.

The terminology used in this creation is only for the purpose of describing specific implementations, and is not intended to limit the protection scope of this creation. As used in the specification and claims of this invention, the singular forms "a", "above" or "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

It should be understood that words such as "first", "second" and similar words used in the description of this creation and in the patent claims do not indicate any order, quantity or importance, but are only used to distinguish the nomenclature of features . Likewise, words like "a" or "one" do not denote a limitation in quantity, but indicate that there is at least one. Unless otherwise indicated, words such as "front", "rear", "upper" and "lower" appear in this work only for the purpose of It is for illustrative purposes and is not intended to be limited to a particular location or orientation in space. "Include" or "comprising" and other similar words are an open-ended expression, which means that the elements appearing before "comprising" or "comprising" cover the elements appearing after "comprising" or "comprising" and their equivalents, This does not exclude that elements appearing before "comprising" or "comprising" may also contain other elements. If "plural" appears in this creation, it means two or more than two.

Please refer to Figs. 1 to 32, the present invention discloses a photovoltaic power optimizer, including a cable assembly 10, a printed circuit board assembly 20, a housing 30, an upper cover 40, a pressing block 50, a thermally conductive adhesive 60, an insulating Paper 70 and heat sink 80 . The printed circuit board assembly 20 is installed in the housing 30, the cable assembly 10 is connected to the printed circuit board assembly 20, the upper cover 40 is installed on the housing 30, the pressure block 50 is installed on the side of the housing 30, and the thermal conductive adhesive 60 is arranged on the The printed circuit board assembly 20 is below and in contact with the printed circuit board assembly 20 , the insulating paper 70 is disposed below and in contact with the thermally conductive adhesive 60 , and the heat sink 80 is installed below the housing 30 and in contact with the insulating paper 70 .

The printed circuit board assembly is hereinafter referred to as PCBA (Printed Circuit Board Assembly), and the printed circuit board is hereinafter referred to as PCB (Printed Circuit Board).

Please refer to FIG. 1 and FIG. 2 , the photovoltaic power optimizer is roughly in the shape of a flat cuboid as a whole, and there is a storage space inside it for placing the PCBA20 and other necessary components of the power optimizer. The components of the photovoltaic power optimizer have a compact structure, which reduces the overall volume of the photovoltaic power optimizer and facilitates installation.

Please refer to FIG. 5 , the cable assembly 10 includes a wire 11 , a connection terminal 12 and a protective cover 13 . The wire 11 includes a main wire body 111 and an end portion 112 located at one end of the main wire body 111; generally speaking, the end portion 112 is integrated with the main wire body 111 and the diameter of the end portion 112 is smaller than the diameter of the main wire body 111, but it is not excluded There are other situations. The connecting terminal 12 includes a base 121, a docking part 122 arranged at one end of the base 121, and a connecting part 123 arranged at the other end of the base 121. Bending upwards; the connection part 123 is matched with the connection end part 112 and fixed by riveting. Specifically, the connection part 112 is placed in the connection part 123, and then the connection part 123 is crimped, and the connection part 123 is extended against the connection end part 112. The protruding part is pressed on the connecting end part 112, so that the two are relatively fixed; the lateral sides of the butt part 122 Symmetrically provided with limiting projections 1221 . The protective sleeve 13 includes a first sleeve portion 131, a second sleeve portion 132 and a third sleeve portion 133, wherein the first sleeve portion 131 is sleeved on the periphery of the base 121, and the second sleeve portion 132 is sleeved on the terminal portion 112 for wiring part 123 after riveting, the third cover part 133 is sleeved on the periphery of the main line body 111; furthermore, the protective cover 13 is relatively fixed with the wire 11 and the terminal 12, the first cover part 131 is attached to the base part 121, and the second cover part 131 is attached to the base part 121. The second sleeve portion 132 is attached to the crimped connection portion 123 , and the third sleeve portion 133 is attached to the main wire body 111 .

Specifically, the protective sheath 13 is made of insulating material, and the protective sheath 13 can be heat-shrinkable, and an insulating sheath or a sheet with a larger inner diameter than the base 121, the riveted end 112 and the main wire body 111 after being riveted by the wiring part 123 is used. Shaped insulating material is placed on the outer periphery of the connection between the wire 11 and the terminal 12, heated to shrink it, and then attached to the base 121, the crimped terminal 123 and the main wire body 111. By covering the connection terminals 12 and the connection between the connection terminals 12 and the wires 11 with the insulating protective sheath 13 , the risk of arcing due to the small distance between adjacent connection terminals 12 can be reduced.

6 to 11, the cable assembly 10 is installed on the PCBA20, the PCBA20 includes a PCB21 and an electronic component 22 installed on the PCB21, the PCB21 has a first surface 21a and a second surface 21b, and the PCB21 is provided with a through docking groove 211 , the connecting terminal 12 is docked in the docking groove 211 ; the connecting terminal is soldered to the PCB 21 by plug-in type, which not only can be well connected with the PCBA 20 , but also reduces the cost. The docking portion 122 is at least partially docked in the docking groove 211, the limiting protrusion 1221 has a first wall 1221a and a second wall 1221b, and the first wall 1221a abuts against the first surface 21a; further, the limiting protrusion 1221 has a first Wall 1221a, second wall 1221b and the third wall 1221c connecting the first wall 1221a and the second wall 1221b, as such, relative to only the first wall 1221a and the second wall 1221b, the former third wall 1221c and the first wall The included angle of 1221a is larger than the included angle between the second wall 1221b and the first wall 1221a, and the limiting protrusion 1221 is softer overall, which is not easy to damage the PCB 21 when the first wall 1221a abuts against the first surface 21a. The setting of the limiting protrusion 1221 can ensure that the welding heights of all the connecting terminals 12 are consistent.

In other embodiments, the docking portion 122 is not provided with a limiting protrusion 1221, and the docking groove 211 is recessed from the first surface 21a toward the second surface 21b and does not penetrate through it. In this way, the bottom end of the docking portion 122 abuts against the groove of the docking groove 211 The bottom surface can also ensure that the welding height of the connecting terminal 12 is consistent.

Please refer to FIG. 6 and FIG. 7, the cable assembly 10 extends along the first direction as a whole, and the plurality of cable assemblies 10 are arranged on the PCBA20 along the second direction as a whole, and the first direction and the second direction are perpendicular to each other, wherein, The first direction is the width direction (W) of the PCBA20, the second direction is the length direction (L) of the PCBA20, and the projections of the butt joints 122 of the adjacent terminals 12 on the second direction do not overlap, that is to say, the plurality of cables The components 10 are arranged in parallel, but not completely arranged side by side. In this way, the connection terminals 12, especially the butt joints 122 are arranged in a misplaced position on the PCB 21, and the distance between the butt joints 122 of adjacent connection terminals 12 is increased. It can be used in conjunction with the protective cover 13. The risk of arcing due to the small distance between adjacent terminals 12 is eliminated.

Referring to FIGS. 3 and 4 , the upper cover 40 has an outer surface 40 a and an inner surface 40 b. The outer surface 40a is provided with "-OUT+" and "+IN-" electrode marks 42, which not only can identify the wiring electrodes more quickly and conveniently, but also facilitate production line production. The inner surface 40b is provided with a pre-pressing boss 43, which can tightly press the inside of the casing 30 together with the glue-filled covering, avoiding internal looseness and ensuring airtightness. The edge of the outer surface 40a is chamfered, which not only reduces the sharpness of the outer surface, but also makes the whole more beautiful.

Furthermore, the edge of the upper cover 40 is provided with an outward convex structure, which facilitates the installation and removal of the upper cover 40 .

Please refer to Fig. 30 and Fig. 32, the upper cover 40 is fixedly mounted on the top of the housing 30, the connection between the inner surface 40b and the housing 30 is provided with a first mounting part 41, and the housing 30 is correspondingly provided with a second mounting part 34, The first installation part 41 is adapted to the second installation part 34 to limit and fix the upper cover 40 on the housing 30 , which is beneficial to the overall sealing. Specifically, the first mounting portion 41 protrudes relative to the inner surface 40b, and the second mounting portion 34 is correspondingly recessed, or the first mounting portion 41 is recessed relative to the inner surface 40b, and the second mounting portion 34 is correspondingly convex, or adopts other matching structures, Both can be installed together.

Please refer to Fig. 6, Fig. 12 to Fig. 15, the housing 30 has an inner bottom wall 30a and an outer bottom wall 30b, the inner bottom wall 30a is provided with at least one positioning column 32, and the PCB 21 is correspondingly provided with at least one positioning hole 212 for positioning The post 32 fits one-to-one with the positioning hole 212 , and when the PCBA 20 is installed in the housing 30 , the positioning post 32 passes through the positioning hole 212 .

Please refer to FIG. 14 to FIG. 17, the inner bottom wall 30a of the housing 30 is also provided with at least one buckle portion 33, and the PCB 21 is correspondingly provided with at least one concave portion 213, and the buckle portion 33 and the concave portion 213 One-to-one matching, a buckle part 33 is buckled in a recessed part 213 . Specifically, the buckle part 33 includes an extension part 331 and a convex buckle part 332, the extension part 331 protrudes upward from the inner bottom wall 30a, and the convex buckle part 332 protrudes from the side of the extension part 331 toward the recessed part 213; The portion 332 has a fourth wall 332a and a fifth wall 332b, and the fourth wall 332a abuts against the first surface 21a of the PCB 21; further, the protruding button portion 332 has a fourth wall 332a, a fifth wall 332b and a connection between the fourth wall 332a and the fifth wall 332b. The sixth wall 332c of the fifth wall 332b, as such, relative to only the fourth wall 332a and the fifth wall 332b, the angle between the former sixth wall 332c and the fourth wall 332a is larger than that of the latter fifth wall 332b and the fourth wall 332a The angle between the protrusions 332 is relatively soft as a whole, and the PCB 21 is not easily damaged when the fourth wall 332a abuts against the first surface 21a. Furthermore, the buckle part 33 has a certain degree of elasticity, when the PCBA20 is installed in the housing 30, the recessed part 213 slides down along the fifth wall 332b and causes a certain amount of extrusion to the buckle part 33, and slides down on the PCBA20 to When located under the buckle portion 332 , springback occurs, so that the buckle portion 332 is buckled on the first surface 21a. If so, the housing 30 and the PCBA 20 are mounted together by the buckle part 33 and the recessed part 213, as well as the positioning column 32 and the positioning hole 212. The screw fixing method is cancelled, and the PCBA 20 is fixed in the housing 30, which simplifies the conventional assembly method and cut costs.

Please refer to Fig. 12, Fig. 13, Fig. 18, Fig. 22 to Fig. 27, the housing 30 includes a pressing block installation part 31, the pressing block installation part 31 is adapted to the pressing block 50, and the pressing block 50 is installed in the pressing block installation part 31. Specifically, the pressing block mounting portion 31 penetrates the housing 30 to form a channel communicating with the inside and outside, the pressing block mounting portion 31 is provided with an upper arc portion 311, and the pressing block 50 is correspondingly provided with a lower arc portion 51, and the upper arc portion 311 and The lower arc portion 51 fits and together forms a through hole 52 for the wire 11 to pass through. Further, the pressure block 50 also includes a limit protrusion 53, the pressure block mounting part 31 is correspondingly provided with a limit groove 312, the limit protrusion 53 is adapted to the limit groove 312, so that the pressure block 50 can be The position limiting and assembly guiding functions also facilitate the alignment of the upper arc portion 311 and the lower arc portion 51 . Furthermore, a groove 531 is provided in the middle of the limiting protrusion 53, and the groove 531 further functions as a waterproof seal. An ultrasonic welding line 55 is also provided at the joint between the upper part of the pressing block 50 and the housing 30 to strengthen the connection between the two, and to further seal the welding of the pressing block 50 and the housing 30 .

Please refer to Fig. 22 to Fig. 27, the side of the pressing block 50 facing the inside of the housing 30 is provided with a glue feeding groove 54, and the glue feeding groove 54 is recessed from the pressing block 50 inwardly, when filling the inside of the housing 30 with glue, The colloid can better flow into the gap where the pressing block 50 and the casing 30 are combined, which is beneficial for waterproof sealing. The glue feeding groove 54 is further provided with a further recessed buffer portion 56, which forms a certain buffer during glue filling, which is beneficial to the glue filling.

Please refer to FIG. 12 and FIG. 18 , the casing 30 further includes a hollow groove 35 penetrating through the inner bottom wall 30 a and the outer bottom wall 30 b. The outer periphery of the hollow groove 35 is provided with a sealing ring groove 36 that is recessed from the outer bottom wall 30b to the inner bottom wall 30a and does not penetrate through it. The sealing ring groove 36 is used for installing a sealing ring and plays a role of waterproof sealing for the product. The outer periphery of the seal ring groove 36 is provided with a water stop groove 37 that is recessed from the outer bottom wall 30b to the inner bottom wall 30a and does not penetrate through it. There is a certain distance between the water stop groove 37 and the seal ring groove 36, and the two are not connected. The arrangement of the water tank 37 can prevent water droplets from flowing into the casing 30 .

Please refer to Fig. 18, Fig. 28 and Fig. 29, the housing 30 is also provided with a cooling plate installation groove 38 which is recessed from the outer bottom wall 30b to the inner bottom wall 30a and does not penetrate through it, a hollow groove 35, a sealing ring groove 36 and a stopper. The projections of the water tank 37 on the radiator plate installation groove 38 are located within the outer contour of the radiator plate installation groove 38 . Further, the cooling plate installation groove 38 forms a right angle from the extension of the outer bottom wall 30 b to the side wall of the housing 30 , so that the installation of the cooling plate 80 is more stable. The cooling plate 80 is adapted to the mounting groove 38 of the cooling plate. The cooling plate 80 includes a base plate 81, a main cooling portion 82 and a matching mounting portion 83; 38 fit, wherein the substrate 81 is attached to the part of the cooling plate installation groove 38 on the outer bottom wall 30b, and the matching installation part 83 is attached to the part of the cooling plate installation groove 38 on the side wall of the housing 30; further, the cooling plate installation groove 38 is provided with a first installation hole 381 , and the cooling plate 80 is correspondingly provided with a second installation hole 84 , and the fastener 90 is used to pass through the second installation hole 84 and the first installation hole 381 to fix the cooling plate 80 on the housing 30 . The cooling plate mounting groove 38 defines a first mounting hole 381 .

Further, the sealing ring groove 36 and the water stop groove 37 are recessed from the cooling plate installation groove 38 toward the inner bottom wall 30 a of the housing 30 .

Please refer to FIG. 28 to FIG. 31 , at least part of the electronic components 22 on the PCBA 20 are mounted on the second surface 21b, or at least part of the electronic components 22 penetrate from the first surface 21a to the second surface 21b. The thermally conductive adhesive 60 is located below the PCBA 20 , and the upper surface of the thermally conductive adhesive 60 is at least partially bonded to the electronic component 22 , the insulating paper 70 is located below the thermally conductive adhesive 60 , and the upper surface of the insulating paper 70 is at least partially attached to the lower surface of the thermally conductive adhesive 60 Bonding, that is, the thermal conductive adhesive 60 connects the electronic component 22 and the insulating paper 70 , the main heat dissipation part 82 is located under the insulating paper 70 , and the main heat dissipation part 82 faces into the housing 30 One of the sides is at least partially bonded to the lower surface of the insulating paper 70 . Part of the electronic components 22 in the PCBA 20 conduct heat to the heat dissipation plate 80 through the thermal conductive glue 60 and the insulating paper 70 in turn, and then dissipate the heat into the atmosphere through the outer surface of the heat dissipation plate 80 .

In some embodiments, the photovoltaic power optimizer does not include the insulating paper 70 , and the main heat dissipation part 82 is directly bonded to the electronic component 22 through the thermally conductive adhesive 60 , which can also realize heat conduction. In this embodiment, insulating paper 70 is added between the main heat dissipation part 82 and the electronic component 22, and the thermally conductive glue 60 is applied on the insulating paper 70; and the size of the insulating paper 70 is larger than the size of the hollow groove 35, that is, the insulating paper 70 is placed on The inner bottom wall 30a of the housing 30 will not fall from the hollow groove 35, and the insulating paper 70 is at least partially attached to the inner bottom wall 30a, so that the heat conducted by the electronic component 22 to the insulating paper 70 is partially transferred to the heat dissipation plate 80, Part of the heat is transferred to the casing 30 , and part of the heat transferred to the casing 30 is dissipated into the atmosphere through the outer surface of the casing 30 , further enhancing the overall heat dissipation effect of the photovoltaic power optimizer.

Further, the main heat dissipation part 82 protrudes from the base plate 81 toward the inside of the housing 30, forms a protrusion on the side of the heat dissipation plate 80 that is attached to the housing 30, and forms a depression on the outer side of the heat dissipation plate 80, from the overall appearance of the photovoltaic power optimizer Seen from above, the main heat dissipation part 82 is sunken inward; the main heat dissipation part 82 is set in the hollow groove 35 of the housing 30 corresponding to the heat dissipation plate 80, that is to say, the heat dissipation plate 80 is actively sunken inward by the insulating paper 70 and the thermally conductive adhesive 60 Conduct heat conduction with the electronic component 22 instead of providing more or thicker heat conduction components, so that not only the heat dissipation efficiency is higher, but also the waterproof sealing performance is better.

Please refer to Fig. 28 and Fig. 29, after the cooling plate 80 is installed in the housing 30, the base plate 81 also extends a part relative to the housing 30, and the extended part of the base plate 81 is provided with a positioning part 811, the photovoltaic power optimizer The positioning part 811 is hooked and fixed in the photovoltaic system.

During the assembly process of the photovoltaic power optimizer, the insulating paper 70 is first placed on the inner bottom wall 30a of the housing 30 and covers the hollow groove 35, and the thermal conductive adhesive 60 is applied on the insulating paper 70; then the PCBA20 is installed on the housing 30 Inside, at least part of the electronic components 22 are bonded with the thermally conductive adhesive 60, the cable assembly 10 is butted on the PCBA20 and welded; the pressing block 50 is installed on the housing 30 to fix the cable assembly 10 so that the wire 11 passes through the through hole 52, and the heat dissipation plate is installed 80 is fixed at the bottom of the housing 30 by fasteners 90; then, glue is poured into the housing 30 from the top of the housing 30 so that the parts in the housing 30 form a whole, and the glue-filling covering covers the entire housing 30 The remaining space of is filled completely; finally Installing the upper cover 40 can visually observe the glue filling process to achieve a better glue filling effect, and the pre-pressed boss 43 on the inner surface 40b of the upper cover 40 can tightly press the components in the housing 30 together with the glue filling coating, Further guarantee the tightness.

To sum up, compared with the conventional technology, the cable assembly and the photovoltaic power optimizer of the present invention have the following advantages: (1) By setting the insulating protective sheath on the terminal 12 and the connection between the terminal 12 and the wire 11 13, and dislocation arrangement of connecting terminals 12 on PCB21 can eliminate the risk of arcing due to the small distance between adjacent connecting terminals 12, thereby avoiding fire damage caused by electric arcs; (2) connecting terminals 12 by Plug-in welding to the PCB21 not only can be well connected with the PCBA20, but also reduces costs; (3) the butt joint 122 of the terminal 12 is provided with a limit protrusion 1221 to ensure that the welding heights of all the terminals 12 are consistent; (4) The heat dissipation plate 80 is provided with a concave main heat dissipation part 82, and the heating element is bonded to the main heat dissipation part 82 by the thermal conductive glue 60 and the insulating paper 70, and conducts the heat to the heat dissipation plate 80, and the heat dissipation plate 80 then dissipates the heat into the atmosphere. Not only the heat dissipation efficiency is higher, but also the waterproof sealing is better; (5) The pressing block 50 installed on the housing 30 is arranged to form a through hole 52 for the wire 11 to pass through, so that the cable assembly 10 can be better installed, and the It will cause frictional damage to the cable assembly 10; (6) The pressure block mounting part 31 of the housing 30 is provided with a limit groove 312, and the pressure block 50 is correspondingly provided with a limit protrusion 53, and the limit protrusion 53 is also provided with a concave Groove 531 not only plays the role of limiting and assembling guide, but also plays the role of waterproof sealing; (7) There is a glue feeding groove between the pressing block and the shell, and the glue can flow into the pressing block and the shell better when pouring glue (8) The housing 30 and PCBA20 are installed in cooperation with the positioning column 32 and the positioning hole 212, the buckle part 33 and the recessed part 213, and the PCBA20 is fixed in the housing 30, simplifying Conventional assembly method and cost reduction; (9) The upper cover 40 and the housing 30 are installed through the cooperation of the first installation part 41 and the second installation part 34, and the upper cover 40 is limited and fixed on the housing 30, which is beneficial to photovoltaic power The overall tightness of the optimizer; (10) The outer surface 40a of the upper cover 40 is provided with an electrode mark 42, which not only can identify the wiring electrodes more quickly and conveniently, but also facilitates the production line; After gluing, the inside of the casing 30 can be tightly pressed together with the glue-filling coating to avoid internal looseness and ensure airtightness.

The above embodiments are only used to illustrate the creation and not limit the technical solutions described in the creation. The understanding of this specification should be based on those skilled in the art, although this specification has described the creation in detail with reference to the embodiment. Note, however, those of ordinary skill in the art should understand that those skilled in the art can still modify or equivalently replace this creation, and all technical solutions and improvements that do not depart from the spirit and scope of this creation should be covered by This creation is within the scope of the patent application.

111: main body

122: docking part

13: Protective sleeve

20: Printed Circuit Board Assembly

21: Printed circuit board

21a: First side

212: positioning hole

213: Depressed part

22: Electronic components

L: length direction

W: width direction

Claims (10)

A cable assembly is suitable for being connected to a printed circuit board assembly. The cable assembly includes a wire and a terminal. The wire includes a main wire body and a connecting end fixed to one end of the main wire body. The wire terminal includes a The base, a pair of butt joints provided at one end of the base, and a connection part provided at the other end of the base, the connection part cooperates with the connection end and is fixed by riveting, and is characterized in that: The cable assembly also includes a protective cover, the protective cover includes a first cover part, a second cover part and a third cover part, the first cover part is sleeved on the periphery of the base part, the second cover part Sleeved on the periphery of the connecting end after being riveted by the wiring part, the third sleeve is sheathed on the periphery of the main wire body; The docking portion is at least partly docked with the printed circuit board assembly, and two lateral sides of the docking portion are respectively provided with a limiting protrusion, and the limiting protrusion abuts against the printed circuit board assembly. The cable assembly as claimed in claim 1, wherein: the docking portion is bent downwards from one end of the base, and the connecting portion is bent upwards from the other end of the base. The cable assembly as claimed in item 1, wherein: the protective sheath is made of insulating material and can be shrunk by heat. A photovoltaic power optimizer, characterized in that it includes a printed circuit board assembly, a housing, and a plurality of cable assemblies as described in any one of claims 1 to 3; The printed circuit board assembly is installed in the housing, the printed circuit board assembly includes a printed circuit board, and the printed circuit board is provided with a pair of mating slots; The cable assembly is installed on the printed circuit board assembly, and the docking portion of the connection terminal in the cable assembly is at least partially docked in the docking groove; The cable assembly extends along a first direction and is arranged along a second direction, the first direction is perpendicular to the second direction, and the projections of the abutting portions of the adjacent connecting terminals on the second direction do not overlap. The photovoltaic power optimizer as claimed in item 4, wherein: the casing includes a pressing block installation part, and the pressing block installation part includes an upper arc part; The photovoltaic power optimizer also includes a pressing block installed on the pressing block installation part, the pressing block includes a lower arc part, the lower arc part corresponds to the upper arc part and forms a through hole together, the cable assembly The main body of the neutral wire extends along the first direction and passes through the through hole. The photovoltaic power optimizer as described in claim 4, wherein: the printed circuit board has a first surface and a second surface, the stop protrusion of the docking part has a first wall and a second wall, the The first wall abuts against the first surface. The photovoltaic power optimizer as described in claim 4, wherein: the housing has an inner bottom wall, the inner bottom wall is provided with at least one positioning column, and the printed circuit board is correspondingly provided with at least one positioning hole, and the positioning column and The pilot hole fits. The photovoltaic power optimizer as described in claim 7, wherein: the inner bottom wall is further provided with at least one buckle part, and the corresponding position of the printed circuit board is provided with at least one concave part, and the buckle part is buckled in the depression department. The photovoltaic power optimizer as described in claim 4, wherein: it also includes an upper cover installed on the housing, the upper cover is provided with a first installation part, and the housing is correspondingly provided with a second installation part, the first installation part Compatible with the second mounting part. The photovoltaic power optimizer as claimed in item 9, wherein: the upper cover has an outer surface and an inner surface, the outer surface is provided with electrode marks, and the inner surface is provided with pre-pressed bosses.

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