CN216450659U - Battery assembly and photovoltaic device - Google Patents

Abstract

The utility model discloses a battery pack and a photovoltaic device, wherein the battery pack comprises: cell piece, first glass layer and second glass layer, first glass layer includes: first main part and first encapsulation portion, first encapsulation portion set up in the edge of first main part and the protrusion sets up, and the second glass layer includes: the battery piece clamping device comprises a second main body and a second packaging part, wherein the second packaging part is arranged at the edge of the second main body and is arranged in a protruding mode, a battery piece is arranged between the first main body and the second main body in a clamping mode, and the first packaging part and the second packaging part are arranged between the first main body and the second main body around the battery piece to form a packaging structure around the battery piece. The side of battery piece encloses and is equipped with first encapsulation portion and second encapsulation portion to and the upper and lower surface of battery piece is provided with first main part and second main part, makes each face of battery piece all can be encapsulated like this, thereby can avoid steam to enter into battery pack's inside effectively, can be in order to avoid battery pack to take place the short circuit.

Description

Battery assembly and photovoltaic device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery assembly and photovoltaic equipment.

Background

Amorphous silicon/crystalline silicon Heterojunction solar cells (HJT) with Intrinsic thin solar cells. Compared with an IBC (indirect back contact) solar cell, the HJT cell has many advantages such as less energy consumption, simple process flow, and small temperature coefficient. At present, China is popularizing distributed solar photovoltaic power generation, and due to the fact that roof resources are limited, and the distributed photovoltaic power generation requires a solar cell module with high conversion efficiency, the HJT solar cell has the advantages of high efficiency and double-sided power generation, and the distributed solar cell module shows wide application prospects in distributed photovoltaic power stations. However, HJT cells are limited by their structure, materials, and fabrication processes, and are sensitive to water vapor.

In the related art, the HJT high-reliability module generally adopts a double-glass design, and generally, glass is considered to be a completely waterproof material, and theoretically, no water vapor enters in the use process, but the water-blocking material at the joint of the front plate glass and the rear half glass only comprises silica gel and a frame, but the water-blocking capacity of the silica gel is far different from that of the glass, so that the water vapor can slowly permeate into the battery piece from the edge position of the module in the long-term operation process of the module, and the short circuit and the power attenuation of the battery piece are caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a battery assembly which can effectively prevent water vapor from entering the interior of the battery assembly.

The utility model further provides photovoltaic equipment.

According to a battery pack of an embodiment of the first aspect of the utility model, comprising: cell piece, first glass layer and second glass layer, first glass layer includes: the first glass layer comprises a first glass layer and a second glass layer, wherein the first glass layer comprises a first main body and a first packaging part, the first packaging part is arranged at the edge of the first main body and is arranged in a protruding mode, and the second glass layer comprises: the battery piece packaging structure comprises a second main body and a second packaging part, wherein the second packaging part is arranged at the edge of the second main body and is arranged in a protruding mode, the battery piece is arranged between the first main body and the second main body in a clamping mode, and the first packaging part and the second packaging part are arranged between the first main body and the second main body in a surrounding mode to form a packaging structure surrounding the battery piece.

According to the battery pack provided by the embodiment of the utility model, the first packaging part and the second packaging part are arranged around the side edge of the battery piece, and the first main body and the second main body are arranged on the upper surface and the lower surface of the battery piece, so that each surface of the battery piece can be packaged, water vapor can be effectively prevented from entering the inside of the battery pack, and the short circuit of the battery pack can be avoided.

According to some embodiments of the utility model, the first encapsulation comprises: the first packaging section and the second packaging section are connected and respectively arranged at two adjacent edges of the first main body; the second package portion includes: the third packaging section and the fourth packaging section are connected and respectively arranged at two adjacent edges of the second main body, the third packaging section and the first packaging section are positioned at two opposite sides of the battery piece, and the fourth packaging section and the second packaging section are positioned at the other two opposite sides of the battery piece.

According to some embodiments of the utility model, the surfaces of the first and second bodies are rectangular, the first encapsulation section corresponds to a length edge of the first body and the second encapsulation section corresponds to a width edge of the first body, the third encapsulation section corresponds to a length edge of the second body and the fourth encapsulation section corresponds to a width edge of the second body.

According to some embodiments of the utility model, the first body has a length L1 and a width W1, and L1 and W1 satisfy the relationship: l1 is more than or equal to 0.2m and less than or equal to 3m, and W1 is more than or equal to 0.2m and less than or equal to 3 m; the second body has a length L2 and a width W2, and L2 and W2 satisfy the relationship: l2 is more than or equal to 0.2m and less than or equal to 3m, and W2 is more than or equal to 0.2m and less than or equal to 3 m.

According to some embodiments of the utility model, the first body has a thickness T1, the first encapsulation portion has a thickness T2, and T1 and T2 satisfy the relationship: t1 is more than or equal to 1mm and less than or equal to 4mm, and T2 is more than or equal to 0.5mm and less than or equal to 4 mm.

According to some embodiments of the utility model, the second body has a thickness T3, the second package portion has a thickness T4, and T3 and T4 satisfy the relationship: t3 is more than or equal to 1mm and less than or equal to 4mm, and T4 is more than or equal to 0.5mm and less than or equal to 4 mm.

According to some embodiments of the utility model, T1, T2, T3, and T4 satisfy the relationship: t1, T2, T3, T4.

According to some embodiments of the utility model, the first and second encapsulation portions have the same height and are h, h satisfying the relation: h is more than or equal to 0.5mm and less than or equal to 1.5 mm.

According to some embodiments of the utility model, the battery assembly further comprises: the first packaging layer and the second packaging layer are clamped on two sides of the battery piece, and the first packaging layer is in contact with the first main body and the second packaging layer is in contact with the second main body.

According to a second aspect embodiment of the utility model, a photovoltaic device comprises: the battery module of the above embodiment.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a sectional view of a battery pack according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a first glass layer or a second glass layer according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first glass layer in a length direction according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a first glass layer in a width direction according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a second glass layer in a length direction according to an embodiment of the utility model;

fig. 6 is a cross-sectional view of a second glass layer in a width direction according to an embodiment of the utility model.

Reference numerals:

100. a battery assembly;

10. a first glass layer; 11. a first body; 12. a first package portion; 121. a first encapsulation section; 122. a second package section;

20. a second glass layer; 21. a second body; 22. a second package portion; 221. a third encapsulation section; 222. a fourth package section;

31. a battery piece; 32. a first encapsulation layer; 33. and a second encapsulation layer.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A cell assembly 100 according to an embodiment of the present invention will be described below with reference to fig. 1 to 6, and the present invention also proposes a photovoltaic device having the cell assembly 100 described above. The battery assembly 100 may be a heterojunction solar cell.

As shown in fig. 1 to 6, a battery assembly 100 according to an embodiment of the present invention includes: battery piece 31, first glass layer 10 and second glass layer 20, first glass layer 10 includes: a first body 11 and a first encapsulation part 12, the first encapsulation part 12 being disposed at an edge of the first body 11, and the first encapsulation part 12 being disposed to protrude with respect to the edge of the first body 11, the second glass layer 20 including: the battery pack comprises a second main body 21 and a second packaging part 22, wherein the second packaging part 22 is arranged at the edge of the second main body 21, the second packaging part 22 is arranged in a protruding mode relative to the edge of the second main body 21, the battery piece 31 is clamped between the first main body 11 and the second main body 21, and the first packaging part 12 and the second packaging part 22 are arranged between the first main body 11 and the second main body 21 and around the battery piece 31 to form a packaging structure surrounding the battery piece 31. That is, the battery sheet 31 is interposed between the first body 11 and the second body 21, i.e., both upper and lower sides of the battery sheet 31 may be sealed.

Moreover, the first main body 11 is provided with a first packaging part 12 protruding towards the second main body 21, and the second main body 21 is provided with a second packaging part 22 protruding towards the first main body 11, so that the first packaging part 12 and the second packaging part 22 are arranged around the battery piece 31 between the first main body 11 and the second main body 21, that is, the side edge of the battery piece 31 can be sealed, and thus, moisture is not easy to enter the battery assembly 100 from the side edge of the battery assembly 100. The first glass layer 10 and the second glass layer 20 are both made of glass, and the glass is a waterproof material.

That is to say, each surface of the battery piece 31 can be encapsulated by the first main body 11, the second main body 21, the first encapsulating portion 12 and the second encapsulating portion 22, so that moisture can be effectively prevented from entering the inside of the battery assembly 100 from each position of the battery assembly 100 in the use process of the battery assembly 100, the insulating property of the battery assembly 100 can be improved, and the short circuit of the battery assembly 100 in use can be avoided.

Wherein, the first glass layer 10 and the second glass layer 20 can be one of a tempered glass layer, an embossed glass layer and a float glass layer. The toughened glass layer can improve the strength of the first glass layer 10 and the second glass layer 20, the toughened glass layer forms compressive stress on the surface of glass, and the toughened glass layer firstly offsets surface stress when bearing external force, so that the bearing capacity of the toughened glass layer is improved. The float glass layer has good thickness uniformity and strong transparency, and the surface of the float glass layer is smooth after tin surface treatment, so that the glass with neat surface, good flatness and strong optical performance is formed under the action of surface tension.

Therefore, the first packaging part 12 and the second packaging part 22 are arranged around the side edge of the battery piece 31, and the first main body 11 and the second main body 21 are arranged on the upper surface and the lower surface of the battery piece 31, so that each surface of the battery piece 31 can be packaged, water vapor can be effectively prevented from entering the battery assembly 100, and short circuit of the battery assembly 100 can be avoided.

Referring to fig. 2 to 6, the first package portion 12 includes: the first and second package segments 121 and 122, the first and second package segments 121 and 122 are connected, and the first and second package parts 12 and 22 are respectively disposed at two adjacent edges of the first body 11, and the second package part 22 includes: the third encapsulating section 221 and the fourth encapsulating section 222 are connected, the third encapsulating section 221 and the fourth encapsulating section 222 are respectively arranged at two adjacent edges of the second body 21, the third encapsulating section 221 and the first encapsulating section 121 are located at one opposite side of the battery piece 31, and the fourth encapsulating section 222 and the second encapsulating section 122 are located at the other opposite side of the battery piece 31. That is, the ends of the first encapsulation section 121 and the second encapsulation section 122 are connected, the ends of the third encapsulation section 221 and the fourth encapsulation section 222 are connected, the first encapsulation section 121 and the third encapsulation section 221 are disposed on two opposite sides of the battery piece 31, the second encapsulation section 122 and the fourth encapsulation section 222 are disposed on the other two opposite sides of the battery piece 31, and the arrangement is such that the side edge of the battery piece 31 is surrounded by the first encapsulation section 121, the second encapsulation section 122, the third encapsulation section 221 and the fourth encapsulation section 222, and the battery piece 31 is sandwiched between the first glass layer 10 and the second glass layer 20, so that the battery piece 31 can be completely wrapped, thereby well preventing moisture from entering the battery assembly 100 from the edge of the battery assembly 100, i.e., avoiding short circuit of the battery piece 31.

In addition, the ends of the first encapsulating section 121 and the second encapsulating section 122 are connected, and the ends of the third encapsulating section 221 and the fourth encapsulating section 222 are connected, so that only the ends of the first encapsulating section 121 and the fourth encapsulating section 222 need to be bonded, and the ends of the second encapsulating section 122 and the third encapsulating section 221 need to be bonded, and the side edge of the battery piece 31 can be sealed, that is, only two positions on the side edge of the battery piece 31 need to be bonded by glue, so that the sealing performance of the battery assembly 100 can be improved.

Referring to fig. 2 to 6, the surfaces of the first and second bodies 11 and 21 are rectangular, the first encapsulation section 121 corresponds to a length edge of the first body 11, and the second encapsulation section 122 corresponds to a width edge of the first body 11, the third encapsulation section 221 corresponds to a length edge of the second body 21, and the fourth encapsulation section 222 corresponds to a width edge of the second body 21. In this way, the first body 11 and the second body 21 are rectangular, the first package section 121, the second package section 122, the third package section 221 and the fourth package section 222 are disposed on four sides of the rectangle, the first package section 121 and the third package section 221 correspond to long sides of the rectangle, the second package section 122 and the fourth package section 222 correspond to short sides of the rectangle, that is, the first package section 121 and the second package section 122 are formed into an L shape, and the third package section 221 and the fourth package section 222 are also formed into an L shape, so that the production of the first glass layer 10 and the second glass layer 20 can be facilitated, and the bonding fit between the first glass layer 10 and the second glass layer 20 can be facilitated.

Referring to fig. 3 to 6, the first body 11 has a length L1 and a width W1, and L1 and W1 satisfy the relationship: 0.2m L1 m 3m, 0.2m W1 m 3m, and the length of the second body 21 is L2 and the width is W2, L2 and W2 satisfy the relation: l2 is more than or equal to 0.2m and less than or equal to 3m, and W2 is more than or equal to 0.2m and less than or equal to 3 m. Wherein, the length L1 of the first body 11 may be equal to the length L2 of the second body 21, and the width W1 of the first body 11 may be equal to the width W2 of the second body 21, so as to facilitate the butt joint of the first glass layer 10 and the second glass layer 20, and improve the sealing performance of the battery assembly 100. Further, the length L1 and the width W1 of the first body 11 may be equal, and the length L2 and the width W2 of the second body 21 may be equal, that is, the first body 11 and the second body 21 may be square.

Referring to fig. 3 to 4, the thickness of the first body 11 is T1, the thickness of the first package portion 12 is T2, and T1 and T2 satisfy the relationship: t1 is more than or equal to 1mm and less than or equal to 4mm, and T2 is more than or equal to 0.5mm and less than or equal to 4 mm. When the thickness T1 of the first body 11 is less than 1mm, the thickness of the first body 11 is too thin, so that the first body 11 has low structural strength and is easily broken when being stressed; when the thickness T1 of the first body 11 is > 4mm, the thickness of the first body 11 is excessively thick, so that the overall size of the battery assembly 100 is excessively large, and the mass of the battery assembly 100 is excessively large, i.e., the lightweight design of the battery assembly 100 cannot be achieved. Therefore, when the thickness T1 of the first body 11 is set to be between 1mm and 4mm, the structural strength of the battery assembly 100 can be improved well, and the lightweight design of the battery assembly 100 is not affected. Similarly, when the thickness T2 of the first packaging part 12 is less than 0.5mm, the distance between the side edge of the battery piece 31 and the outside is too small to achieve the sealing of the battery piece 31; when the thickness T2 of the first sealing portion 12 is greater than 4mm, the space between the side edge of the battery piece 31 and the outside is too large, which is likely to cause material waste. Therefore, the thickness T2 of the first packing portion 12 is set between 0.5 and 4mm, so that the first packing portion 12 has good sealability without causing waste of material.

Also, referring to fig. 5 and 6, the thickness of the second body 21 is T3, the thickness of the second package portion 22 is T4, and T3 and T4 satisfy the relationship: t3 is more than or equal to 1mm and less than or equal to 4mm, and T4 is more than or equal to 0.5mm and less than or equal to 4 mm. When the thickness T3 of the second body 21 is less than 1mm, the thickness of the second body 21 is too thin, so that the second body 21 has low structural strength and is easily broken when being stressed; when the thickness T3 of the second body 21 is greater than 4mm, the thickness of the second body 21 is too thick, so that the overall size of the battery assembly 100 is too large, and the mass of the battery assembly 100 is too large, i.e., a lightweight design of the battery assembly 100 cannot be achieved. Therefore, when the thickness T3 of the second body 21 is set to be between 1mm and 4mm, the structural strength of the battery assembly 100 can be improved well, and the lightweight design of the battery assembly 100 is not affected. Similarly, when the thickness T4 of the second packaging part 22 is less than 0.5mm, the distance between the side edge of the battery piece 31 and the outside is too small to achieve good sealing of the battery piece 31; when the thickness T4 of the second packaging part 22 is greater than 4mm, the space between the side edge of the battery piece 31 and the outside is too large, which is likely to cause material waste. Therefore, the thickness T4 of the second sealing portion 22 is set to be between 0.5 and 4mm, so that the sealing performance of the second sealing portion 22 is good and no waste of material is caused.

Referring to fig. 3-6, T1, T2, T3, and T4 satisfy the relationship: t1, T2, T3, T4. That is, the thickness T1 of the first body 11, the thickness T2 of the first sealing part 12, the thickness T3 of the second body 21, and the thickness T4 of the second sealing part 22 are equal, and are arranged such that the structures of the first glass layer 10 and the second glass layer 20 are equal, facilitating the production of the first glass layer 10 and the second glass layer 20, and facilitating the assembly of the battery pack 100.

Referring to fig. 3-6, the first and second encapsulations 12, 22 are of the same height and both are h, which satisfies the relationship: h is more than or equal to 0.5mm and less than or equal to 1.5 mm. Wherein the height h of the first and second sealing parts 12 and 22 is affected by the weight of the first and second glass layers 10 and 20 and the thickness of the battery piece 31. When the height h of the first and second packing parts 12 and 22 is less than 0.5mm, the thickness of the battery piece 31 is limited by h, so that the thickness of the battery piece 31 is excessively thin, which is inconvenient for the practical installation and use of the battery piece 31. When the height h of the first and second packaging parts 12 and 22 is greater than 1.5mm, the height of the first and second packaging parts 12 and 22 is too large, and the battery assembly 100 is bulky, occupies a large space, and is inconvenient for subsequent use of the battery assembly 100. Therefore, when the height h of the first packaging part 12 and the second packaging part 22 is between 0.5 and 1.5, the space of the battery assembly 100 can be reasonably utilized, the battery assembly 100 is prevented from being too thick to influence the use, and the battery assembly 100 is prevented from being too thin to influence the arrangement of the battery piece 31.

As shown in fig. 1, the battery assembly 100 further includes: the first and second encapsulating layers 32 and 33, the first and second encapsulating layers 32 and 33 are sandwiched on both sides of the battery sheet 31, the first encapsulating layer 32 is in contact with the first body 11, and the second encapsulating layer 33 is in contact with the second body 21. Therefore, by providing the first sealing layer 32 between the first body 11 and the battery piece 31 and providing the second sealing layer 33 between the second body 21 and the battery piece 31, when the battery piece 31 is sandwiched between the first sealing layer 32 and the second sealing layer 33, even if moisture passes through the first sealing portion 12 and the second sealing portion 22, the moisture needs to be bent several times to contact the battery piece 31, that is, the sealing performance of the battery assembly 100 can be further improved, and the insulating performance of the battery assembly 100 can be improved.

Further, the sum of the thicknesses of the first encapsulating layer 32, the second encapsulating layer 33 and the battery piece 31 is less than or equal to the thickness h of the first encapsulating portion 12 or the second encapsulating portion 22, and is set such that the first encapsulating portion 12 can abut on the second body 21 and the second encapsulating portion 22 can abut on the first body 11, so that further sealing of the battery piece 31 can be achieved.

A photovoltaic device according to an embodiment of the second aspect of the utility model, comprises: the battery assembly 100 of the above embodiment. The photovoltaic device comprises the battery assembly 100 of the embodiment, so that the conversion efficiency of the photovoltaic device can be improved, and the power generation performance of the photovoltaic device can be improved. The photovoltaic device provided with the battery assembly 100 has almost no light attenuation phenomenon when in use, and even has a certain degree of increase in efficiency under illumination, namely the conversion efficiency of the battery assembly 100 of the photovoltaic device is increased after illumination, and the attenuation phenomenon does not occur after continuous illumination. Moreover, the symmetrical structure of the battery assembly 100 makes the battery assembly 100 suitable for being laminated, which can save production cost.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery assembly, comprising:

a battery piece;

a first glass layer comprising: the packaging structure comprises a first main body and a first packaging part, wherein the first packaging part is arranged at the edge of the first main body and is arranged in a protruding manner;

a second glass layer comprising: the battery piece packaging structure comprises a second main body and a second packaging part, wherein the second packaging part is arranged at the edge of the second main body and is arranged in a protruding mode, the battery piece is arranged between the first main body and the second main body in a clamping mode, and the first packaging part and the second packaging part are arranged between the first main body and the second main body in a surrounding mode to form a packaging structure surrounding the battery piece.

2. The battery assembly of claim 1, wherein the first encapsulant comprises: the first packaging section and the second packaging section are connected and respectively arranged at two adjacent edges of the first main body;

the second package portion includes: the third packaging section and the fourth packaging section are connected and respectively arranged at two adjacent edges of the second main body, the third packaging section and the first packaging section are positioned at two opposite sides of the battery piece, and the fourth packaging section and the second packaging section are positioned at the other two opposite sides of the battery piece.

3. The battery assembly of claim 2, wherein the surfaces of the first and second bodies are rectangular, the first encapsulation section corresponding to a length edge of the first body and the second encapsulation section corresponding to a width edge of the first body, the third encapsulation section corresponding to a length edge of the second body and the fourth encapsulation section corresponding to a width edge of the second body.

4. The battery assembly of claim 3, wherein the first body has a length L1 and a width W1, and wherein L1 and W1 satisfy the relationship: l1 is more than or equal to 0.2m and less than or equal to 3m, and W1 is more than or equal to 0.2m and less than or equal to 3 m;

the second body has a length of L2 and a width of W2, and L2 and W2 satisfy the relationship: l2 is more than or equal to 0.2m and less than or equal to 3m, and W2 is more than or equal to 0.2m and less than or equal to 3 m.

5. The battery pack of claim 1, wherein the first body has a thickness T1, the first encapsulant has a thickness T2, and T1 and T2 satisfy the relationship: t1 is more than or equal to 1mm and less than or equal to 4mm, and T2 is more than or equal to 0.5mm and less than or equal to 4 mm.

6. The battery pack of claim 5, wherein the second body has a thickness T3, the second encapsulant has a thickness T4, and T3 and T4 satisfy the relationship: t3 is more than or equal to 1mm and less than or equal to 4mm, and T4 is more than or equal to 0.5mm and less than or equal to 4 mm.

7. The battery pack of claim 6, wherein T1, T2, T3, and T4 satisfy the relationship: t1, T2, T3, T4.

8. The battery assembly of claim 1, wherein the first and second encapsulants are the same height and h, h satisfying the relationship: h is more than or equal to 0.5mm and less than or equal to 1.5 mm.

9. The battery assembly of claim 1, further comprising: the first packaging layer and the second packaging layer are clamped on two sides of the battery piece, and the first packaging layer is in contact with the first main body and the second packaging layer is in contact with the second main body.

10. A photovoltaic device, comprising: the battery module of any one of claims 1-9.

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