CN113054317A - Battery structure, electronic equipment and preparation method of battery structure - Google Patents

Abstract

The application discloses a battery structure and electronic equipment, and relates to the technical field of batteries; wherein this battery structure includes: a first cell and a second cell; a first side face of the first battery cell is provided with a first packaging folded edge, the first side of the first packaging folded edge is provided with at least one first protruding part, and a first gap is formed between the first packaging folded edge and the first side face; the first side is the side of the first packaging folded edge far away from the first side surface; the first packaging folded edge is arranged adjacent to the second side face of the second battery cell, and a second gap is formed between the first packaging folded edge and the second side face; the first gap and the second gap are filled with adhesive, and the adhesive covers the first packaging folded edge. The battery fixing device can solve the problems that the battery is poor in flatness due to the fact that the battery is not firm to fix and large in thickness of the fixed position, poor in insulation effect and even in electrocorrosion risk.

Description

Battery structure, electronic equipment and preparation method of battery structure

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery structure, an electronic device, and a method for manufacturing the battery structure.

Background

With the development of electronic devices, the fast charging requirement of batteries is higher and higher, and the conventional single-cell design cannot meet the fast charging requirement of the batteries, so that the number of multi-cell batteries is increased gradually. The multi-cell battery has the irreplaceable advantages of fast charging, low heating and the like, and meanwhile, the fixation problem among the multiple cells is also the key for influencing the strength and the flatness of the battery, indirectly influencing the reliability test of the battery and the like. The existing multi-cell battery has the problems of poor flatness of the battery due to infirm fixation and large thickness of the fixed position, poor insulation effect and even risk of electric corrosion.

Disclosure of Invention

The embodiment of the application provides a battery structure, electronic equipment and a preparation method of the battery structure, and aims to solve the problems that the flatness of a battery is poor due to the fact that the fixation of the conventional multi-core battery is not firm and the thickness of a fixed position is large, the insulation effect is poor and even the risk of electric corrosion exists.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a battery structure, including: a first cell and a second cell;

a first side face of the first battery cell is provided with a first packaging folded edge, a first side of the first packaging folded edge is provided with at least one first protruding part, and a first gap is formed between the first packaging folded edge and the first side face; the first side is the side of the first package folded edge away from the first side surface;

the first packaging folded edge is arranged adjacent to the second side face of the second battery cell, and a second gap is formed between the first packaging folded edge and the second side face; and adhesives are filled in the first gap and the second gap and wrap the first packaging folded edge.

In a second aspect, embodiments of the present application further provide an electronic device, including the battery structure described above.

In a third aspect, an embodiment of the present application further provides a method for manufacturing a battery structure, including:

oppositely fixing a first battery cell and a second battery cell to a position where a first protruding part on a first packaging folding edge of the first battery cell is in contact with the second battery cell and a second gap is formed between the first packaging folding edge and a second side face of the second battery cell; the first packaging folding edge is positioned on a first side face of the first battery cell, and a first gap is formed between the first packaging folding edge and the first side face;

and filling adhesive into the first gap and the second gap and curing.

In this way, in the above-mentioned scheme of the present application, the first protruding portion of the first package flange of the first battery cell may play a role in limiting, so that a second gap may be formed between the first package flange and the second side surface; the first battery cell and the second battery cell are connected and fixed through adhesives filled in the first gap and the second gap between the first battery cell and the second battery cell, so that the connection reliability between the battery cells is improved, and the overall thickness of a battery structure can be reduced and the flatness of the battery structure can be ensured in a fixing mode through single-sided adhesives adhered to the two opposite surfaces of the battery cells between the two battery cells; and the first packaging folded edge is also coated by the adhesive, so that the problem that the first packaging folded edge is directly contacted with air to cause electric corrosion is avoided.

Drawings

FIG. 1 shows one of the schematic top views of the cell structure of the presently filed embodiment;

FIG. 2 is a schematic side view of a cell structure according to an embodiment of the present disclosure;

FIG. 3 shows an enlarged view of a first package flange of an embodiment of the present application;

FIG. 4A shows one of the schematic views of a first package flange of an embodiment of the present application;

FIG. 4B shows a second schematic view of the first package flange of the present application;

fig. 5 is a schematic perspective view showing the structure of a battery according to an embodiment of the present application;

fig. 6 is a second schematic top view of a battery structure according to an embodiment of the present invention;

FIG. 7 is a second schematic side view of a battery cell according to an embodiment of the present invention;

FIG. 8 shows an enlarged view of the first and second package flaps of an embodiment of the present application;

fig. 9 is a third schematic top view of a battery structure according to an embodiment of the present invention.

Description of reference numerals:

11. a first cell; 111. a first side surface; 112. a third side; 101. a first package flange; 102. a first protrusion; 103. a second protrusion; 107. a third packaging folded edge;

12. a second cell; 121. a second side surface; 122. a fourth side; 104. second packaging and folding edges; 105. a third protrusion; 106. a fourth protrusion; 108. a fourth packaging folded edge;

13. an adhesive;

A. a first gap;

B. a second gap.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1 to 3, an embodiment of the present application provides a battery structure, including: a first cell 11 and a second cell 12;

a first side surface 111 of the first battery cell 11 is provided with a first packaging flange 101, a first side of the first packaging flange 101 is provided with at least one first protruding part 102, and a first gap a is formed between the first packaging flange 101 and the first side surface 111; the first side is the side of the first package flange 101 that is distal from the first side 111.

The first package flange 101 is disposed adjacent to a second side surface of the second battery cell 12, and a second gap B is formed between the first package flange 101 and the second side surface 121; the first protruding portion 103 contacts the second battery cell 12, the first gap a and the second gap B are both filled with an adhesive 13, and the adhesive 13 covers the first package flange 101.

Wherein the adhesive 13 covering the first package flange 101 can be understood as: the first package flap 101 is wrapped inside the adhesive 13 to avoid direct contact of the first package flap 101 with air. The adhesive 13 may completely wrap the first package flange 101, or may wrap a portion of the first package flange 101, so as to protect the first package flange 101 and reduce the risk of electrical corrosion.

For example: the adhesive 13 may be injected into the first gap between the first cell 11 and the second cell 12 by using an external device with a certain pressure, the adhesive 13 may have a certain fluidity when being injected, and after the adhesive 13 is cured, a stable connection between the first cell 11 and the second cell is achieved.

Alternatively, the first package edge may be an edge formed by a package structure (e.g., an aluminum film, etc.) for packaging the first cell 11 on the first side 111 of the first cell 11, for example, the first package edge is connected to the first surface of the first cell 11, and the first package edge is bent from the first surface toward the third surface of the first cell 11; the first surface and the third surface are opposite to each other, and the first surface and the third surface are adjacent to the first side surface 111 respectively.

Alternatively, the first protrusion may be a protruding structure disposed on a surface of the first package flange 101 away from the first side surface, or the first protrusion may be a structure protruding on the first side and recessed on the second side (e.g., may be formed by a drawing process, a stamping process, a bending process, or other processes besides).

In this way, the first protrusion 102 of the first package flange 101 of the first battery cell 11 may play a role of limiting, so that a second gap B may be formed between the first package flange 101 and the second side surface 121; the first battery cell 11 and the second battery cell 12 are connected and fixed through adhesives filled in the first gap a and the second gap B between the first battery cell 11 and the second battery cell 12, so that the connection reliability between the battery cells is improved, and the overall thickness of the battery structure can be reduced and the flatness of the battery structure can be ensured in a fixing mode through single-sided adhesives adhered to the two opposite surfaces of the battery cells between the two battery cells; and the first packaging flange 101 is also covered by the adhesive 13, so that the problem that the first packaging flange 101 is in direct contact with air and can cause electric corrosion is avoided.

Optionally, the first protruding portion 102 is in contact with the second battery cell 12, so that the first protruding portion 102 can perform a limiting function, so as to quickly determine a distance of a gap between the first side surface of the first battery cell 11 and the second side surface of the second battery cell 12, thereby avoiding using an external positioning device to determine a distance of a gap between the first battery cell 11 and the second battery cell 12, and facilitating improvement of the preparation efficiency.

Alternatively, in the case where the first sealing flange 101 is provided with a plurality of first protrusions 102, the plurality of first protrusions 102 are arranged in sequence along the length direction of the first side surface.

In this way, by providing the plurality of first protruding portions 102, it can be ensured that the first protruding portions 102 have a limiting effect, so that the stability of the second gap formed between the first package flange 101 and the second side surface 121 can be ensured, the contact area between the adhesive and the first package flange can be increased, the connection stability between the first battery cell 11 and the second battery cell 12 can be further ensured, and the reliability of the battery structure can be improved.

Optionally, a second side of the first package flange 101 is provided with at least one second protrusion 103, and the second protrusion 103 is in contact with the first side 111; the second side is the side of the first package flange 101 facing the first side 111.

Alternatively, in the case that there are a plurality of first protrusions 102 and a plurality of second protrusions 103 on the first package flange 101, the first protrusions 102 and the second protrusions 103 may be spaced apart from each other; the second protrusions 103 may be located at opposite positions between two adjacent first protrusions 102, for example: the opposite positions of two adjacent first protrusions 102 may be provided with one second protrusion 103 or two second protrusions 103, and the like, which may be specifically set according to actual processing requirements, and this is not limited in this embodiment of the application.

Alternatively, the first protrusion 102 may be a structure protruding on a first side and recessed on a second side; the second protrusion 103 may be a protrusion on the second side and a recess on the first side.

In this way, when there are a plurality of first protrusions 102 and second protrusions 103, the "wave-shaped" first package flange 101 is formed. Alternatively, the wave shape size and number of the first protrusion 102 and the second protrusion 103 on the first encapsulation flange 101 can be adjusted according to the requirement, as shown in fig. 4A and 4B; of course, the shape of the first protrusion 102 and the second protrusion 103 may be one or a combination of an arc shape, a triangle shape, a square shape, a trapezoid shape, a diamond shape, or other shapes, and the embodiment of the present application is not limited thereto.

Optionally, a side of the first electrical core 11 opposite to the first side 111 may also be provided with an encapsulation flange, where the encapsulation flange may be a plane, or a curved surface similar to the first encapsulation flange 101, and this is not limited in this embodiment of the application.

In this implementation, the protruding portion is formed by protruding one side of the first package flange 101 to the other side, so that it is ensured that the adhesive 13 has a large contact area with the first package flange 101 on the basis of ensuring that the adhesive 13 has a sufficient filling space, and the connection stability between the first battery cell 11 and the second battery cell 12 is further ensured, thereby improving the reliability of the battery structure.

Optionally, a second side 121 of the second battery cell 12 is provided with a second package flange 104, and a first sub-gap is provided between the second package flange 104 and the second side 121.

Wherein the first package flap 101 is disposed adjacent to the second package flap 104, and a second sub-gap is formed between the first package flap 101 and the second package flap 104; the first protrusion 102 contacts the second package flap 104, and the first gap, the first sub-gap, and the second sub-gap are filled with an adhesive, and the adhesive covers the first package flap 101 and the second package flap 104.

Optionally, the first package flap 101 and the second package flap 104 may be completely wrapped inside the adhesive, or partially wrapped inside the adhesive, so as to protect the first package flap 101 and the second package flap 104 and reduce the risk of electrical corrosion.

Optionally, the second package flange 104 may be a flange formed on the second side 121 of the second cell 12 by a package structure (e.g., an aluminum film, etc.) for packaging the second cell 12, for example, the second package flange 104 is connected to the second surface of the second cell 12, and the second package flange 104 is bent from the second surface toward the fourth surface of the second cell 12; the second surface and the fourth surface are opposite to each other, and the second surface and the fourth surface are respectively adjacent to the second side surface 121.

In this embodiment, for the second battery cell 12 having the second package flange 104, since the adhesive 13 can cover the first package flange 101 and the second package flange 102, the problem that the first package flange 101 and the second package flange 102 are directly contacted with air to easily cause electrical corrosion is also avoided, so that the risk of electrical corrosion is reduced.

Optionally, a side of the second encapsulation flap 104 away from the second side 121 is planar or curved. As shown in fig. 5 to 8, the third side of the second sealing flap 104 is provided with at least one third protrusion 105, and one third protrusion 105 is disposed opposite to one first protrusion 102; the third side is the side of the second package flap 104 remote from the second side 121.

In this embodiment, the first protrusion 102 of the first package flange 101 and the third protrusion 105 of the second package flange 104 are disposed opposite to each other, so as to limit the gap between the first package flange 101 and the second package flange 104. In this way, in the case where the same width gap is required, the size of the first protruding portion 102 can be reduced to facilitate the processing, compared to the case where only the first package flange 101 has the first protruding portion 102. And the first protruding part 102 on the first package flange 101 is arranged opposite to the third protruding part 105 on the second package flange 104, so that the filling space of the adhesive 13 between the first battery cell 11 and the second battery cell 12 can be increased, and the stability of the gap formed between the first battery cell 11 and the second battery cell 12 and filled with the adhesive can be ensured.

Optionally, a fourth side of the second package flap 104 is provided with at least one fourth protrusion 106, and the fourth protrusion 106 is in contact with the second side 121; the fourth side is the side of the second package flap 104 facing the second side 121.

Alternatively, in the case where there are a plurality of third protrusions 105 and a plurality of fourth protrusions 106 on the second package flap 104, the third protrusions 105 and the fourth protrusions 106 may be spaced apart from each other; the fourth protrusions 106 may be located at opposite positions between two adjacent third protrusions 105, for example: the opposite positions of two adjacent third protruding portions 105 may be provided with one fourth protruding portion 106 or two fourth protruding portions 106, and the like, which may be specifically set according to actual processing requirements, and this is not limited in this application embodiment.

Alternatively, the third protrusion 105 may be a structure protruding on a third side and recessed on a fourth side; the fourth protrusion 106 may be a protrusion on the fourth side and a recess on the third side.

In this way, when there are a plurality of third protrusions 105 and fourth protrusions 106, the "wavy" second package flange 104 is formed. Optionally, the wave shape size and number of the third protrusion 105 and the fourth protrusion 106 on the second encapsulation flap 104 can be adjusted according to requirements, as can be seen in the first encapsulation flap shown in fig. 4A and 4B; of course, the shape of the third protrusion 105 and the fourth protrusion 106 may be one or a combination of an arc shape, a triangle shape, a square shape, a trapezoid shape, a diamond shape, or other shapes, and the embodiment of the present application is not limited thereto.

Optionally, as shown in fig. 5, a side of the second battery cell 12 opposite to the second side 121 may also be provided with a package flange, where the package flange may be a flat surface, or a curved surface similar to the second package flange, and this is not limited in this embodiment of the application.

Optionally, the battery structure may further include a plurality of battery cells, a gap is formed between two adjacent battery cells in the plurality of battery cells, and the gap is filled with a binder. For example: the plurality of battery cells can be sequentially arranged transversely/longitudinally, and the adjacent battery cells are fixed by the adhesive filled in the gaps; or a plurality of electric cores are arranged in a staggered manner, if the first side surface of the first electric core is parallel and level with the second side surface of the second electric core, the third side surface of the third electric core is adjacent to the first side surface and the second side surface to form a gap, and the gap is filled with an adhesive to realize fixation among the first electric core, the second electric core and the third electric core, and the like.

Alternatively, the cells in the battery structure may be special-shaped cells, as shown in fig. 9, the first cell 11 is in an "L" shape, and the second cell 12 is in a rectangular shape. When the first battery cell 11 and the second battery cell 12 are fixed, two side surfaces may be provided between the first battery cell 11 and the second battery cell 12 for fixing, so as to improve the connection stability between the first battery cell 11 and the second battery cell 12.

For example: the third side 112 of the first cell 11 is disposed adjacent to the fourth side of the second cell 12, and a third gap is formed between the third side 112 and the fourth side 122; the third gap is filled with an adhesive; wherein the third side 112 is adjacent to the first side 111; the fourth side 122 is adjacent to the second side 121.

Optionally, a third package flap 107 may be disposed on a third side 112 of the first cell 11, and a third sub-gap is provided between the third package flap and the third side; a fourth packaging flange 108 may be disposed on a fourth side 122 of the second cell 12, and a fourth sub-gap is formed between the fourth packaging flange 108 and the fourth side 122; wherein the third package flap 107 and the fourth package flap 108 are adjacently disposed, and a fifth sub-gap is provided between the third package flap 107 and the fourth package flap 108; the third sub-gap, the fourth sub-gap and the fifth sub-gap are filled with adhesive, and the third package flange 107 and the fourth package flange 108 are covered by the adhesive.

This embodiment can further guarantee the steadiness of connecting between first electric core and the second electricity core to improve battery structure's reliability, and for carrying out the fixed mode through pasting the single face that carries on the back mutually at electric core two surfaces between two electric cores, can also reduce battery structure's whole thickness, and guarantee battery structure's roughness, and avoid third encapsulation hem 107 and fourth encapsulation hem 108 direct and air contact probably to cause the problem of galvanic corrosion.

Optionally, a side of the third package flap 107 away from the third side 112 may be provided with at least one fifth protrusion (see the above-mentioned first package flap 101 in a similar manner, which is not described herein again); the side of the fourth package flap 108 away from the fourth side 122 may be provided with at least one sixth protrusion (see the second package flap 104 in a similar manner, which is not described herein); wherein one fifth protrusion is disposed opposite to one sixth protrusion.

In this way, in a manner that the protruding portions are arranged on the third and fourth package flanges 107 and 108, and the protruding portions on the third and fourth package flanges 107 and 108 are arranged in a one-to-one correspondence manner, the size of the protruding portion arranged when the protruding portion is arranged in the one-sided folding structure is reduced to facilitate processing when the same width gap is required. And the protruding parts on the third package folding edge 107 and the fourth package folding edge 108 are arranged in a one-to-one correspondence manner, so that the filling space of the adhesive 13 between the first battery cell 11 and the second battery cell 12 can be increased, and the stability of the gap formed between the first battery cell 11 and the second battery cell 12 and filled with the adhesive can be ensured.

Optionally, the surface of the adhesive 13 is flush with the first surface of the first cell 11 and the second surface of the second cell 12; alternatively, the surface of the adhesive 13 is lower than the first surface and the second surface; alternatively, the thickness of the first portion of the adhesive 13 is less than or equal to 5% of the thickness of the first cell; the first portion is a portion of the adhesive 13 higher than the first and second surfaces.

Wherein the surface of the adhesive 13, the first surface and the second surface are located on the same side, the first surface is adjacent to the first side, and the second surface is adjacent to the second side.

For example: the first surface may be an upper or lower surface adjacent to the first side 111 in fig. 1; the second surface may be an upper or lower surface adjacent to second side 121 in fig. 1; the thickness of the first battery cell 11 and the thickness of the second battery cell 12 may be the same, or the thickness difference between the two may be within a preset range, that is, the upper surface of the first battery cell 11 and the upper surface of the second battery cell 12 may be level or offset within a preset range (for example, the preset range may be an error range of process machining), or the lower surface of the first battery cell 11 and the lower surface of the second battery cell 12 may be level or offset within a preset range.

The upper surface of the adhesive 13 filled between the first battery cell 11 and the second battery cell 12 may be lower than the upper surface of the first battery cell 11 and the upper surface of the second battery cell 12, or flush with the upper surfaces of the first battery cell 11 and the second battery cell 12, or higher than the upper surfaces of the first battery cell 11 and the second battery cell 12 by less than or equal to 5% of the thickness of the battery cells.

The lower surface of the adhesive 13 filled between the first battery cell 11 and the second battery cell 12 may be lower than the lower surface of the first battery cell 11 and the lower surface of the second battery cell 12, or flush with the lower surfaces of the first battery cell 11 and the second battery cell 12, or higher than the lower surfaces of the first battery cell 11 and the second battery cell 12 by less than or equal to 5% of the thickness of the battery cells.

The relationship between the upper surface of the adhesive 13 and the upper surface of the battery cell, and the relationship between the lower surface of the adhesive 13 and the lower surface of the battery cell may be the same or different; for example, the upper surface of the adhesive 13 filled between the first cell 11 and the second cell 12 may be lower than the upper surfaces of the first cell 11 and the second cell 12, and the lower surface of the adhesive 13 filled between the first cell 11 and the second cell 12 may also be lower than the lower surface of the first cell 11 and the lower surface of the second cell 12; alternatively, the upper surface of the adhesive 13 filled between the first battery cell 11 and the second battery cell 12 may be lower than the upper surfaces of the first battery cell 11 and the second battery cell 12, and the lower surface of the adhesive 13 filled between the first battery cell 11 and the second battery cell 12 may be flush with the lower surface of the first battery cell 11 and the lower surface of the second battery cell 12, which is not limited in this embodiment of the application.

For example: taking a cell with a thickness of 5.0mm as an example, when the surface of the adhesive 13 is lower than or higher than the surface of the cell, the size of the part of the surface of the adhesive 13 lower than the surface of the cell is within 0.25mm, and the thickness of the part of the surface of the adhesive 13 higher than the surface of the cell is within 0.25 mm.

Optionally, the adhesive comprises an Ultraviolet (UV) glue. Such as: the curing connection between the first battery cell 11 and the second battery cell 12 can be realized by filling UV glue in the gap between the first battery cell 11 and the second battery cell 12 and naturally curing the UV glue, so as to ensure that the battery cell is damaged due to ultraviolet irradiation when the gap between the first battery cell 11 and the second battery cell 12 is small; or when the gap between the first battery cell 11 and the second battery cell 12 is large, the UV glue curing may be accelerated by ultraviolet irradiation to shorten the preparation time, thereby improving the preparation efficiency.

Optionally, the adhesive further comprises a moisture curable glue on the UV glue. Such as: the gap between the first cell 11 and the second cell 12 may be filled with the UV glue first, and then the UV glue is filled with the moisture curing glue, so as to improve the curing speed of the UV glue, avoid the cell damage possibly caused by the UV glue curing mode through ultraviolet irradiation, and shorten the preparation time, thereby improving the preparation efficiency.

The embodiment of the present application further provides an electronic device, which includes the battery structure as described above, and can achieve the technical effect that can be achieved by the battery structure, and for avoiding repetition, details are not repeated here.

The embodiment of the application also provides a preparation method of the battery structure, which comprises the following steps:

oppositely fixing a first battery cell and a second battery cell to a position where a first protruding part on a first packaging folding edge of the first battery cell is in contact with the second battery cell and a second gap is formed between the first packaging folding edge and a second side face of the second battery cell; the first packaging folding edge is positioned on a first side face of the first battery cell, and a first gap is formed between the first packaging folding edge and the first side face; and filling adhesive into the first gap and the second gap and curing.

Optionally, the second gap may be a gap between the first package flange and the second side surface of the second battery cell, and the second gap may also include the first sub-gap and the second sub-gap in the above embodiments.

For example: the first cell and the second cell may be adjusted to: the first packaging folding edge of the first battery cell is adjacent to the second side face of the second battery cell, and the first protruding portion on the first packaging folding edge is in contact with the second battery cell or has a certain gap (such as a gap within a processing error range), so that the first battery cell and the second battery cell are respectively compressed through external equipment after a position with a second gap is formed between the first packaging folding edge and the second side face, and the filling failure caused by looseness of the first battery cell and the second battery cell when the adhesive is filled is prevented.

Optionally, taking an example that the first battery cell and the second battery cell both have package hems, and each package hem has a protrusion: in the preparation process of the battery structure, the protruding parts of the package hems on one side of the battery core, which is used for being connected with another battery core, can be processed and manufactured (for example, the hems are manufactured into a wave shape), then the package hems which are in the wave shape on the two battery cores are butted (for example, the protruding parts on the two battery cores are arranged oppositely, and a gap which is communicated up and down is formed between the two battery cores so as to ensure that an adhesive can flow through the gap channel), and the battery structure is pre-fixed through a jig, as shown in fig. 6.

And filling adhesive in a gap between the two pre-fixed battery cells, wherein the adhesive can be filled in the gap from the upper surface of the battery cell to one side of the lower surface. Thus, the adhesive can flow downwards through a gap channel generated by the wavy packaging folded edges in the two battery cells, so that the side edges of the two battery cells can be fully connected through the adhesive, and the two battery cells form a whole after the adhesive is solidified, thereby enhancing the structural strength of the battery; and the wavy packaging edgefold can increase the contact area of the adhesive and the packaging edgefold, so that the connection strength is further improved, and the gap width can be increased under the condition that the protruding parts on the two battery cells are oppositely arranged, so that the adhesive can be better filled from one side of the battery cell to the other side, and the operation of filling the adhesive is facilitated.

Optionally, to the clearance part in the middle of the encapsulation hem of two electric cores, can use the relatively better UV of mobility earlier to glue, follow the upper surface of electric core and fill to the lower surface under certain atmospheric pressure, can guarantee to have better filling effect under the less prerequisite in two electric core clearances, be full of glue to the clearance intussuseption, guarantee that two electric core bodies are connected with glue. When adopting UV glue alone, because can adopt the UV lamp to shine and make its fast curing usually, for avoiding the UV lamp to shine the temperature too high, cause the influence to electric core performance to and under the condition that the gap between the electric core is little, advance the light few, shine the unsatisfactory scheduling problem of postcure effect, can select the UV to glue the natural curing, as long as reach the maximum strength when terminal equipment packs into can (if place 48H and above), thereby can improve preparation efficiency.

Or, the gap between two electric cores is big enough, and can shine for a long time with the UV lamp and do not influence under the circumstances of electric core characteristic, can adopt the mode that the UV lamp shines to solidify UV glue, can solidify to guarantee that the intensity that the UV glued satisfies the production needs can to improve preparation efficiency.

Optionally, after filling the UV glue, a moisture-curable glue (i.e. a chemical reaction occurs after contacting with water vapor in the air, the glue hardens rapidly without additional humidification), so as to promote rapid curing of the glue, shorten the curing time, and improve the connection strength. In order to shorten the curing waiting time, the strength of the battery can meet the production requirement in a short time (the maximum strength is not required), and the production efficiency can be greatly improved.

Like this, treat moisture cured glue and the solidification back of UV glue, the hardness and the intensity of glue can guarantee the joint strength between the electric core, compare in the mode that bonds at the upper and lower surface of electric core through single face glue at present, both improved joint strength, improved the surface smoothness of battery structure again.

In addition, glue can be all filled the blank between two electric core bodies, and electric core body snap-on is in the same place, can also be in the same place with electric core body fixed the encapsulation hem for electric core body activity, and the atress position of two batteries expands bigger, more even to the intensity of battery structure has been strengthened.

Optionally, if the reserved gap between two electric cores is bigger, also can beat modes such as glue from the upper and lower surface of electric core respectively, guarantee to fill the effect, improve production efficiency, this application embodiment does not use this as the limit.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

While the foregoing is directed to the preferred embodiment of the present application, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the disclosure and, therefore, the scope of the disclosure is to be defined by the appended claims.

Claims (13)

1. A battery structure, comprising: a first cell and a second cell;

a first side face of the first battery cell is provided with a first packaging folded edge, a first side of the first packaging folded edge is provided with at least one first protruding part, and a first gap is formed between the first packaging folded edge and the first side face; the first side is the side of the first package folded edge away from the first side surface;

the first packaging folded edge is arranged adjacent to the second side face of the second battery cell, and a second gap is formed between the first packaging folded edge and the second side face; and adhesives are filled in the first gap and the second gap and wrap the first packaging folded edge.

2. The battery structure of claim 1, wherein the first protrusion is in contact with the second cell.

3. The cell structure of claim 2, wherein, in the case where the first package flange is provided with a plurality of first protrusions, the plurality of first protrusions are arranged in sequence along a length direction of the first side surface.

4. The battery structure of claim 2, wherein the second side of the first enclosure flap is provided with at least one second protrusion, the second protrusion being in contact with the first side; the second side is a side of the first package flap that faces the first side.

5. The battery structure of claim 2, wherein the second side of the second cell is provided with a second package flange, and a first sub-gap is formed between the second package flange and the second side;

the first packaging folding edge and the second packaging folding edge are arranged adjacently, and a second sub-gap is formed between the first packaging folding edge and the second packaging folding edge; the first protruding part is in contact with the second packaging folded edge, the first gap, the first sub-gap and the second sub-gap are filled with the adhesive, and the adhesive covers the first packaging folded edge and the second packaging folded edge.

6. The battery structure of claim 5, wherein a third side of the second enclosure flap is provided with at least one third protrusion, and one third protrusion is disposed opposite one first protrusion; the third side is the side of the second package folded edge away from the second side.

7. The battery structure of claim 6, wherein a fourth side of the second enclosure flap is provided with at least one fourth protrusion, the fourth protrusion contacting the second side; the fourth side is a side of the second package flap that faces the second side.

8. The battery structure of claim 2, wherein a surface of the adhesive is flush with the first surface of the first cell and the second surface of the second cell;

or,

the surface of the adhesive is lower than the first surface and the second surface;

or,

the thickness of the first portion of the adhesive is less than or equal to 5% of the thickness of the first cell; the first part is a part of the adhesive which is higher than the first surface and the second surface;

wherein the surface of the adhesive, the first surface and the second surface are located on the same side, the first surface is adjacent to the first side, and the second surface is adjacent to the second side.

9. The battery structure according to any one of claims 1 to 8, wherein the adhesive comprises: and (4) ultraviolet UV glue.

10. The battery structure of claim 9, wherein the adhesive further comprises: and the moisture curing glue is positioned on the UV glue.

11. The battery structure of any of claims 1-8, wherein a third side of the first cell is disposed adjacent to a fourth side of the second cell with a third gap therebetween; the third gap is filled with an adhesive;

wherein the third side is adjacent to the first side; the fourth side is adjacent to the second side.

12. An electronic device characterized by comprising the battery structure according to any one of claims 1 to 11.

13. A method of making a battery structure, comprising:

oppositely fixing a first battery cell and a second battery cell to a position where a first protruding part on a first packaging folding edge of the first battery cell is in contact with the second battery cell and a second gap is formed between the first packaging folding edge and a second side face of the second battery cell; the first packaging folding edge is positioned on a first side face of the first battery cell, and a first gap is formed between the first packaging folding edge and the first side face;

and filling adhesive into the first gap and the second gap and curing.

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