CN218975615U - Battery packaging structure, single battery and battery pack - Google Patents

Abstract

The utility model discloses a battery packaging structure, a single battery and a battery pack, wherein the battery packaging structure comprises: a housing, the housing comprising: the shell comprises a shell body and a first rolling part, wherein one end of the shell body is provided with an opening, and the first rolling part is arranged at one end of the shell body and is bent inwards; the apron, the apron includes: the cover plate main body is arranged at the opening, the second seaming part is arranged at the peripheral edge of the cover plate main body, and the second seaming part and the first seaming part are mutually wound and are in sealing fit to form a seaming part; and the sealing piece is arranged between the rolling sealing part and the cover plate main body so as to seal the rolling sealing part and the cover plate main body. Therefore, the sealing performance between the shell and the cover plate is better, the packaging process is simpler, the battery pack components can be connected to the same side of the single battery in the subsequent battery pack assembly process, and the battery pack components can be connected to the two ends of the single battery, so that the battery pack assembly device can adapt to more assembly modes.

Description

Battery packaging structure, single battery and battery pack

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a battery packaging structure, a single battery, and a battery pack.

Background

At present, the battery is widely applied to various occasions as a movable power supply and becomes an indispensable article for people's life.

In the related art, when the battery is packaged, the preparation process is complex, and the sealing performance of the battery is difficult to ensure in the preparation process, so that the packaging difficulty between the shell and the cover plate is increased, and the industrial production is not facilitated.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to provide a battery packaging structure that can package a unit battery.

The utility model further provides a single battery.

The utility model further provides a battery pack.

The battery package structure according to the present utility model includes: a housing, the housing comprising: the device comprises a shell body and a first rolling part, wherein an opening is formed in one end of the shell body, and the first rolling part is arranged at one end of the shell body and is bent into the opening; a cover plate, the cover plate comprising: the cover plate main body is arranged at the opening, the second seaming part is arranged at the peripheral edge of the cover plate main body, and the second seaming part and the first seaming part are mutually wound and are in sealing fit to form a seaming part; and a sealing member disposed between the sealing portion and the cover plate body to seal the sealing portion and the cover plate body.

According to the battery packaging structure, the sealing piece is arranged between the shell and the cover plate, so that the sealing performance between the shell and the cover plate is better, the packaging process is simpler, the battery packaging components can be connected to the same side of the single battery in the subsequent battery packaging process, the battery packaging components can be connected to the two ends of the single battery, and more packaging modes can be adapted.

In some examples of the utility model, the first seal is wrapped around the second seal, and the seal is disposed between the first seal and the cover body.

In some examples of the utility model, the first seaming portion includes: the first roll-up section and second roll-up section, first roll-up section connect in the one end of casing main part and orientation open-ended center is buckled and is set up, the second roll-up section connect in first roll-up section orientation one side of apron main part and deviate from open-ended center is buckled and is set up, the second roll-up portion set up in apron main part deviate from one side of casing main part and wind first roll-up section with between the second roll-up section, the sealing member set up in the second roll-up section with between the apron main part.

In some examples of the utility model, the thickness of both ends of the first seaming section is less than the thickness of the housing body; and/or the thickness of one end, connected with the cover plate main body, of the second rolling sealing part is smaller than the thickness of the cover plate main body.

In some examples of the utility model, the second seal is face-to-face bonded to the first seal to make an electrical connection.

In some examples of the present utility model, the one end of the case body is provided with a bending portion bending into the case body, the bending portion and the first seal are disposed at an interval in an axial direction of the case body, and the bending portion abuts on an outer peripheral edge of the cover body.

In some examples of the utility model, a side surface of the cover body facing away from the housing body is at least partially coplanar with a side surface of the first seal facing away from the housing body.

In some examples of the present utility model, a protrusion protruding toward the inside of the case body is provided at a middle portion of the cover body, and a first liquid injection hole is provided at the middle portion of the protrusion.

In some examples of the present utility model, one of a sealing cover, a sealing nail and a rivet is correspondingly disposed at the first liquid injection hole.

In some examples of the utility model, a transition step is provided at the edge of the boss, and a pressure relief groove is provided at the edge of the transition step.

In some examples of the utility model, the other end of the housing body is provided with an end cap provided with a through hole; the battery package structure further includes: terminal, first insulating part, second insulating part and metal pad, a part of first insulating part set up in the outside of end cover and another part wear to establish the through-hole, the second insulating part set up in the inboard of end cover, the metal pad set up in the second insulating part deviates from one side of end cover, the terminal wear to establish behind the first insulating part with the metal pad is connected.

In some examples of the utility model, a side of the first insulating member facing away from the housing body is provided with a first groove, and a portion of the terminal is located outside the housing body and is accommodated in the first groove; and/or a second groove is formed in one side, facing the inside of the shell main body, of the metal pad, and the other part of the terminal is positioned in the shell main body and is accommodated in the second groove; and/or a third groove is formed in the middle of the terminal, and one side, away from the shell body, of the third groove is opened.

In some examples of the present utility model, the battery package structure further includes: the third insulating piece is attached to the inner surface of the shell body, and a gap is reserved between the third insulating piece and the second insulating piece.

The unit cell according to the present utility model includes: the battery packaging structure is characterized in that an end cover is arranged at the other end of the shell body; the pole core is arranged in the shell body; the collector plate is arranged at one end of the pole core and one end of the cover plate main body; and the current collecting plate is arranged between the other end of the pole core and the end cover.

In some examples of the utility model, the collector plate includes: the novel solar cell comprises a first lug connecting portion, a cover plate connecting portion and a first connecting bridge, wherein the first connecting bridge is obliquely connected between the first lug connecting portion and the cover plate connecting portion, the first lug connecting portion is arranged at one end of a pole core and connected with a lug of the pole core, and the cover plate connecting portion is in butt joint with a cover plate main body and is electrically connected.

In some examples of the present utility model, a first liquid injection hole is provided on the cover main body, a second liquid injection hole is provided on the first tab connection portion, the second liquid injection hole and the first liquid injection hole are oppositely arranged in the axial direction of the housing main body, and the diameter of the second liquid injection hole is greater than or equal to the diameter of the first liquid injection hole.

In some examples of the utility model, the first connection bridge is provided with a first notch on at least one side.

In some examples of the utility model, the battery package structure includes: the terminal is arranged on the end cover; the current collecting plate includes: the second lug connecting portion, terminal connecting portion and second connecting bridge, the second connecting bridge connect in with the slope second lug connecting portion with between the terminal connecting portion, second lug connecting portion set up in the other end of utmost point core and with the utmost point ear of utmost point core is connected, terminal connecting portion with terminal butt and electricity are connected.

In some examples of the utility model, a second notch is provided on at least one side of the second connecting bridge.

The battery pack according to the present utility model includes: the single battery is described above.

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 foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a sectional view of a unit cell according to an embodiment of the present utility model;

fig. 2 is an enlarged view of region a in fig. 1;

FIG. 3 is an enlarged view of region B of FIG. 1;

fig. 4 is a top view of the collector plate;

fig. 5 is a top view of a current collector plate;

fig. 6 is a schematic diagram of welding of unit cells according to an embodiment of the present utility model.

Reference numerals:

100. a single battery; 110. a pole core; 120. a current collecting plate; 121. a first tab connection portion; 122. a cover plate connecting part; 123. a first connection bridge; 124. a second liquid injection hole; 125. a first notch; 130. a current collecting plate; 131. a second lug connection; 132. a terminal connection portion; 133. a second connecting bridge; 134. a second notch;

1. a battery packaging structure; 2. a housing; 21. a housing body; 22. a first seaming part; 221. a first seaming section; 222. a second seaming section; 23. a receiving groove; 24. a bending part; 25. an end cap; 26. a through hole; 3. a cover plate; 31. a cover plate main body; 311. a first liquid injection hole; 312. a pressure relief groove; 32. a second seaming part; 33. a protrusion; 34. a transition step; 4. a seal; 5. a terminal; 51. a third groove; 6. a first insulating member; 61. a first groove; 7. a second insulating member; 8. a metal pad; 81. a second groove; 9. a third insulating member;

10. a first welding region; 20. a second welding region; 30. a third welding region; 40. a fourth welding region; 50. and a fifth welding area.

Detailed Description

Embodiments of the present utility model will be described in detail below, with reference to the accompanying drawings, which are exemplary.

A battery package structure 1 according to an embodiment of the present utility model, which may package a unit battery 100, is described below with reference to fig. 1 to 6.

As shown in fig. 1 and 3, a battery package structure 1 according to an embodiment of the present utility model includes: casing 2, apron 3 and sealing member 4, casing 2 and apron 3 constitute the major structure of battery packaging structure 1, and sealing member 4 constitutes the sealing structure of battery packaging structure 1, and casing 2 includes: casing main part 21 and first package portion 22, the one end of casing main part 21 is provided with the opening, and first package portion 22 sets up in the one end of casing main part 21, and to the setting of buckling in the opening, apron 3 includes: the cover plate main body 31 and the second seal rolling part 32, the cover plate main body 31 is arranged at the opening, the second seal rolling part 32 is arranged at the peripheral edge of the cover plate main body 31, the second seal rolling part 32 and the first seal rolling part 22 are mutually coiled and are in sealing fit, so that the shell 2 and the cover plate 3 are mutually in sealing fit, the seal piece 4 is arranged between the seal rolling part and the cover plate main body 31, the gap between the seal rolling part and the cover plate main body 31 can be sealed, no gap exists between the shell 2 and the cover plate 3, and the tightness between the shell 2 and the cover plate 3 is improved.

It will be appreciated that the first seal 22 on the housing 2 and the second seal 32 on the cover 3 are in sealing engagement with each other, and that the seal 4 is located between the seal and the cover body 31 to fill the gap between the seal and the cover body 31, thereby providing a tighter sealing engagement between the housing 2 and the cover 3.

Therefore, by arranging the sealing piece 4 between the shell 2 and the cover plate 3, the sealing performance between the shell 2 and the cover plate 3 is better, the packaging process is simpler, and in the subsequent battery pack assembly process, the shell 2 and the cover plate 3 are electrically connected, so that battery pack components can be connected on the same side of the single battery 100, and the battery pack components can be connected at two ends of the single battery 100, so that the single battery 100 can adapt to more assembly modes.

Wherein, as shown in fig. 3, the first seal part 22 is wound around the second seal part 32, and the seal 4 is disposed between the first seal part 22 and the cover main body 31. The winding manner can improve the sealing reliability between the first rolling seal part 22 and the second rolling seal part 32 on one hand, and can enable the sealing element 4 to seal between the first rolling seal part 22 and the cover plate main body 31 on the other hand, so that at least two layers of sealing can be formed, and the sealing performance between the shell 2 and the cover plate 3 can be better improved.

As shown in fig. 3, the first seaming part 22 includes: the first package section 221 and the second package section 222, the first package section 221 is connected to one end of the housing main body 21 and is bent towards the center of the opening, the second package section 222 is connected to one side of the first package section 221 towards the cover plate main body 31 and is bent away from the center of the opening, the second package section 32 is arranged on one side of the cover plate main body 31 away from the housing main body 21 and is wound between the first package section 221 and the second package section 222, and the sealing element 4 is arranged between the second package section 222 and the cover plate main body 31. That is, the first seal segment 221 is connected to the housing main body 21, the first seal segment 221 is bent towards the center of the opening, so as to seal and protect the opening, the second seal segment 222 is connected to the other end of the first seal segment 221, and the accommodating groove 23 is formed between the first seal segment 221 and the second seal segment 222, so that the second seal portion 32 is sealed between the first seal segment 221 and the second seal segment 222, the cover main body 31 and the sealing member 4 are sealed and connected with each other, so that the sealing performance between the housing 2 and the cover 3 is better.

Specifically, as shown in fig. 3, the thickness of both ends of the first seaming section 221 is smaller than the thickness of the case body 21, and the thickness of one end of the second seaming section 32 connected to the cover body 31 is smaller than the thickness of the cover body 31. That is, the bending portion of the first seal segment 221 is smaller than the thickness of the housing body 21, so that the first seal segment 221 is convenient to bend, the second seal 32 is connected to one end of the cover body 31 and has a thickness smaller than the thickness of the cover body 31, so that the second seal 32 is convenient to bend.

Of course, as shown in fig. 3, the second seal portion 32 is in surface-to-surface contact with the first seal portion 22, so that electrical connection can be achieved. Thus, the housing 2 and the cover plate 3 can be electrically connected, so that the electrode of the single battery 100 can be conveniently led out, and when the single battery 100 is assembled into a battery pack, the electrode of the single battery 100 can be led out from the same end of the housing 2 or respectively led out from one end of the housing 2 and the cover plate 3. In this way, the unit cells 100 can be assembled into a battery pack, thereby facilitating the production and manufacture of the unit cells 100.

Further, as shown in fig. 1 and 3, one end of the case main body 21 is provided with a bending portion 24 bending into the case main body 21, the bending portion 24 and the first seal portion 22 are provided at intervals in the axial direction of the case main body 21, and the bending portion 24 abuts on the outer peripheral edge of the cover main body 31. That is, the bending portion 24 is bent inwards on the housing main body 21, so that the cover plate 3 is conveniently covered on the housing 2, and the abutting plane is arranged on the bending portion 24, so that the bending portion 24 is conveniently matched with the housing main body 21 in an abutting manner, and the tightness of the housing 2 is ensured.

Wherein, as shown in fig. 1 and 3, a side surface of the cover main body 31 facing away from the housing main body 21 is at least partially coplanar with a side surface of the first seal roller 22 facing away from the housing main body 21. So configured, subsequent testing and assembly of the battery cell 100 may be facilitated.

In addition, as shown in fig. 3, the cover plate main body 31 is provided at the middle thereof with a protrusion 33 protruding toward the inside of the case main body 21, the protrusion 33 is provided at the middle thereof with a first liquid injection hole 311, the first liquid injection hole 311 may be used for injecting an electrolyte to the unit cell 100, the first liquid injection hole 311 is correspondingly provided with one of a sealing cap, a sealing nail and a rivet, and a portion of the sealing cap, the sealing nail and the rivet for sealing the first liquid injection hole 311 exposed to the outside of the unit cell 100 may be accommodated in a space left after the protrusion 33 protrudes toward the inside of the case 2, thereby reducing the overall height of the unit cell 100.

As shown in fig. 3, a transition step 34 is disposed at the edge of the protrusion 33, and the transition step 34 may make the protrusion 33 and other parts of the cover main body 31 transition naturally, which may be beneficial to improving the structural reliability of the cover main body 31. The edge of the transition step 34 is provided with a pressure relief groove 312, and when the pressure in the single battery 100 is too high, the pressure relief groove 312 can be broken, so that the gas in the single battery 100 is rapidly discharged, and the safety performance of the single battery 100 is improved.

Further, as shown in fig. 1 and 2, the other end of the case body 21 is provided with an end cap 25, and the end cap 25 is provided with a through hole 26 for mounting the terminal 5, and the battery package structure 1 further includes: terminal 5, first insulating part 6, second insulating part 7 and metal pad 8, first insulating part 6 sets up in the outside and the through-hole 26 of end cover 25, and second insulating part 7 sets up in the inboard of end cover 25, and metal pad 8 sets up in the one side that second insulating part 7 deviates from end cover 25, and terminal 5 wears to be connected with metal pad 8 after establishing first insulating part 6. That is, the terminal 5 is riveted at the through hole 26 and kept insulated from the end cap 25, and the first insulator 6 and the second insulator 7 are located between the terminal 5 and the housing main body 21, whereby the terminal 5, the first insulator 6, the end cap 25, the second insulator 7 and the metal pad 8 are sequentially arranged from outside to inside at the through hole 26, so that insulation between the terminal 5 and the housing main body 21 can be performed, and short circuit between the terminal 5 and the housing main body 21 after power is applied can be prevented. The caulking may be performed from the outside to the inside or from the inside to the outside. The utility model shows a structure riveted from outside to inside.

As shown in fig. 2, the first insulating member 6 is provided with a first groove 61, a part of the terminal 5 is located outside the housing body 21 and is accommodated in the first groove 61, the metal pad 8 is provided with a second groove 81, another part of the terminal 5 is located inside the housing body 21 and is accommodated in the second groove 81, a third groove 51 is provided in the middle of the terminal 5, and one side of the third groove 51 facing away from the housing body 21 is opened. The first recess 61 is the step form, set up like this and be convenient for fix a position terminal 5, the partly holding of terminal 5 is in first recess 61, can reduce the monomer battery 100 that terminal 5 occupy like this highly, another part holding of terminal 5 is in second recess 81, can hold in second recess 81 when terminal 5 receives the extrusion, make the lower extreme of terminal 5 not surpass the lower terminal surface of metal pad 8, thereby can reduce the battery height that terminal 5 part occupy, the third recess 51 is located the middle part of terminal 5, can attenuate the thickness of terminal 5 central part, be convenient for follow-up follow outside directly with terminal 5 and current collecting plate 130 welding together.

In addition, as shown in fig. 2, the battery package structure 1 further includes: the third insulating member 9, the third insulating member 9 is disposed in the housing body 21, and a gap is left between the third insulating member 9 and the second insulating member 7, and the third insulating member 9 can avoid contact between the current collecting plate 130 and the housing 2. Specifically, the third insulating member 9 and the inner wall of the casing main body 21 can be fixedly connected together through an injection molding mode, a gap is formed between the third insulating member 9 and the second insulating member 7, interference between the third insulating member 9 and the second insulating member 7 during installation can be avoided, the size of the gap needs to meet the tolerance of equipment installation, and the size of the gap is not too large, so that short circuit of a battery is prevented.

As shown in fig. 1, a unit cell 100 according to another embodiment of the present utility model includes: in the battery packaging structure 1, the pole core 110, the current collecting plate 120 and the current collecting plate 130 of the foregoing embodiment, the end cover 25 is disposed at the other end of the housing main body 21, the pole core 110 is disposed in the housing main body 21, so that the housing main body 21 protects the pole core 110, the service life of the pole core 110 is prolonged, the current collecting plate 120 is disposed between the pole core 110 and the cover main body 31, that is, the current collecting plate 120 is disposed at the lower end of the unit battery 100, and the current collecting plate 130 is disposed between the pole core 110 and the end cover 25, that is, the current collecting plate 130 is disposed at the upper end of the unit battery 100.

As shown in fig. 3 and 4, the collector plate 120 includes: the first tab connection part 121, the cover plate connection part 122 and the first connection bridge 123, the first connection bridge 123 is connected between the first tab connection part 121 and the cover plate connection part 122 in an inclined manner, the first tab connection part 121 is arranged at one end of the pole core 110, the first tab connection part 121 is connected with the tab of the pole core 110, and the cover plate connection part 122 is connected with the cover plate main body 31. That is, the first tab connection part 121, the cap plate connection part 122, and the first connection bridge 123 are connected as one body to constitute the collector plate 120. The number of the first connection bridges 123 may be designed according to actual needs, and specifically may be 3, 4, 5, 6, etc. For example, the number of first connection bridges 123 shown in fig. 4 is 3.

The first connecting bridge 123 may be provided with a region having a smaller width or a thinner thickness, and when the current in the battery cell 100 increases, the overcurrent capacity of the region is smaller than that of other portions of the first connecting bridge 123, so that the first connecting bridge may break, thereby blocking the current from passing through the first connecting bridge, and protecting the battery cell 100.

Specifically, as shown in fig. 4, a first notch 125 is provided on at least one side of the first connection bridge 123. Alternatively, the first notch 125 may be disposed in the width direction of the first connection bridge 123 or may be disposed in the length direction of the first connection bridge 123. For example, the first notch 123 is disposed in the width direction of the first connection bridge, and the width of the first notch 125 is smaller than the width of the other portion of the first connection bridge 123. When the current flowing through the first notch 125 increases, the overcurrent capacity at the first notch 125 is smaller than that at other positions on the first connecting bridge 123, so that the first notch 125 may break, thereby blocking the current, and protecting the single battery 100.

Further, as shown in fig. 2 and 3, the cover main body 31 is provided with a first liquid injection hole 311, the first tab connection portion 121 is provided with a second liquid injection hole 124, the second liquid injection hole 124 and the first liquid injection hole 311 are disposed opposite to each other in the axial direction of the housing main body 21, and the diameter of the second liquid injection hole 124 is equal to or larger than the diameter of the first liquid injection hole 311. In this way, the first liquid injection hole 311 and the second liquid injection hole 124 are communicated, so that the electrolyte is injected into the single battery 100 from the first liquid injection hole 311 and the second liquid injection hole 124, and the diameter of the second liquid injection hole 124 is larger than or equal to the diameter of the first liquid injection hole 311, so that the electrolyte is conveniently injected into the single battery 100. For example, the shape of the second pour spout 124 may be circular, fan-shaped, oval, polygonal, or other shapes.

Further, as shown in fig. 3 and 5, the battery package structure 1 includes: terminal 5, terminal 5 sets up on end cover 25, and current collector 130 includes: the second tab connection part 131, the terminal connection part 132 and the second connection bridge 133, the second connection bridge 133 is connected between the second tab connection part 131 and the terminal connection part 132 in an inclined manner, the second tab connection part 131 is disposed at the other end of the pole core 110 and is connected with the tab of the pole core 110, and the terminal connection part 132 is electrically connected with the terminal 5. That is, the second tab connection part 131 and the terminal connection part 132 are connected by the second connection bridge 133, a region having a smaller width or a thinner thickness may be provided on the second connection bridge 133, the second tab connection part 131 is located at the upper end of the pole core 110, the second tab connection part 131 is connected with the tab of the pole core 110, and the terminal connection part 132 is located on the terminal 5. For example, the number of the second connection bridges 133 may be designed according to actual needs, and specifically may be 3, 4, 5, 6, or the like. For example, the number of the second connection bridges 133 shown in fig. 5 is 3.

The second connection bridge 133 may be provided with a region having a smaller width or a smaller thickness, and when the current in the battery cell 100 increases, the overcurrent capacity of the region is smaller than that of other portions of the second connection bridge 133, so that the second connection bridge may break, thereby blocking the current from passing through and protecting the battery cell 100.

Specifically, as shown in fig. 5, a second notch 134 is provided on at least one side of the second connection bridge 133. Alternatively, the second notch 134 may be disposed in the width direction of the first connection bridge 123 or may be disposed in the length direction of the first connection bridge 123. For example, the second notch 134 is disposed in the width direction of the first connection bridge, and the width of the second notch 134 is smaller than the width of the other portion of the second connection bridge 133. When the current flowing through the second notch 134 increases, the overcurrent capacity of the second notch 134 is smaller than that of other positions on the second connecting bridge 133, so that the second notch 134 may break, thereby blocking the current from flowing through the battery cell 100 and protecting the battery cell 100.

The assembly process of the unit cell 100 is described in detail below.

The sealing element 4 is arranged on the cover plate 3 in advance, the place needing bending on the cover plate 3 is subjected to thinning treatment in advance, subsequent bending is facilitated, the cover plate 3 is fixedly connected with the current collecting plate 120, then the shell 2 is bent inwards by bending equipment, so that a bending part 24 is formed, the bending part 24 can be fixedly abutted with the current collecting plate 120, a gap can be reserved, subsequent assembly is facilitated, the shell 2 can be bent firstly, the bending part 24 is formed, and then the cover plate 3 is fixedly connected with the current collecting plate 120.

The first rolling and sealing part 22 of the shell 2 is bent to wrap the second rolling and sealing part 32 of the cover plate 3, and the sealing piece 4 is arranged on the cover plate 3, so that sealing is formed between the first rolling and sealing part 22, the second rolling and sealing part 32 and the cover plate main body 31, the sealing performance of the sealing mode is better, the process preparation mode is more mature, and the industrial production is facilitated.

The terminal 5 and the current collecting plate 130 can be electrically connected by welding, abutting and bonding, the current collecting plate 130 and the tab can be electrically connected by welding, abutting and bonding, the current collecting plate 120 and the tab can be electrically connected by welding, abutting and bonding, and the current collecting plate 120 and the cover plate 3 can be electrically connected by welding, abutting and bonding. For example, the connection modes are all welding.

As shown in fig. 6, the first welding region 10 is formed by welding between the terminal 5 and the current collecting plate 130, the second welding region 20 is formed by welding between the current collecting plate 130 and the tab, the third welding region 30 is formed by welding between the current collecting plate 120 and the tab, the fourth welding region 40 is formed by welding between the current collecting plate 120 and the cap plate 3, and the fifth welding region 50 is formed by sealing the sealing cover with the cap plate 3.

According to an embodiment of the present utility model, a battery pack includes: the unit cell 100 described in the above embodiment.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. In the description of the present utility model, "plurality" means two or more. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

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

Claims (12)

1. A battery package structure, characterized by comprising:

a housing, the housing comprising: the device comprises a shell body and a first rolling part, wherein an opening is formed in one end of the shell body, and the first rolling part is arranged at one end of the shell body and is bent into the opening;

a cover plate, the cover plate comprising: the cover plate main body is arranged at the opening, the second seaming part is arranged at the peripheral edge of the cover plate main body, and the second seaming part and the first seaming part are mutually wound and are in sealing fit to form a seaming part; and

the sealing piece is arranged between the rolling sealing part and the cover plate main body to seal the rolling sealing part and the cover plate main body.

2. The battery package structure of claim 1, wherein the first seal is wrapped around the second seal, the seal being disposed between the first seal and the cover body.

3. The battery package structure according to claim 2, wherein the first seal includes: the first roll-up section and second roll-up section, first roll-up section connect in the one end of casing main part and orientation open-ended center is buckled and is set up, the second roll-up section connect in first roll-up section orientation one side of apron main part and deviate from open-ended center is buckled and is set up, the second roll-up portion set up in apron main part deviate from one side of casing main part and wind first roll-up section with between the second roll-up section, the sealing member set up in the second roll-up section with between the apron main part.

4. The battery package structure according to claim 3, wherein the thickness of both ends of the first seal-rolling section is smaller than the thickness of the case body; and/or

The thickness of one end of the second rolling sealing part connected with the cover plate main body is smaller than that of the cover plate main body.

5. The battery package structure of claim 2, wherein the second seal is face-to-face bonded to the first seal to make electrical connection.

6. The battery package structure according to claim 1, wherein the other end of the case body is provided with an end cap provided with a through hole;

the battery package structure further includes: terminal, first insulating part, second insulating part and metal pad, a part of first insulating part set up in the outside of end cover and another part wear to establish the through-hole, the second insulating part set up in the inboard of end cover, the metal pad set up in the second insulating part deviates from one side of end cover, the terminal wear to establish behind the first insulating part with the metal pad is connected.

7. The battery package structure according to claim 6, wherein a side of the first insulating member facing away from the case body is provided with a first groove, and a portion of the terminal is located outside the case body and accommodated in the first groove; and/or

A second groove is formed in one side, facing the inside of the shell body, of the metal pad, and the other part of the terminal is positioned in the shell body and is accommodated in the second groove; and/or

The middle part of terminal is provided with the third recess, the third recess deviates from the open setting of one side of casing main part.

8. A single cell, characterized by comprising:

the battery packaging structure of any one of claims 1 to 7, the other end of the case body being provided with an end cap;

the pole core is arranged in the shell body;

the collector plate is arranged at one end of the pole core and one end of the cover plate main body; and

the current collecting plate is arranged between the other end of the pole core and the end cover.

9. The unit cell according to claim 8, wherein the current collecting plate comprises: the novel solar cell comprises a first lug connecting portion, a cover plate connecting portion and a first connecting bridge, wherein the first connecting bridge is obliquely connected between the first lug connecting portion and the cover plate connecting portion, the first lug connecting portion is arranged at one end of a pole core and connected with a lug of the pole core, and the cover plate connecting portion is in butt joint with a cover plate main body and is electrically connected.

10. The cell of claim 9, wherein the first connecting bridge has a first notch disposed on at least one side.

11. The cell as defined in claim 8, wherein the battery packaging structure comprises: the terminal is arranged on the end cover;

the current collecting plate includes: the second connecting bridge is obliquely connected between the second lug connecting part and the terminal connecting part, the second lug connecting part is arranged at the other end of the pole core and is connected with the lug of the pole core, and the terminal connecting part is abutted with the terminal and is electrically connected with the terminal; at least one side of the second connecting bridge is provided with a second notch.

12. A battery pack, comprising: the unit cell of any one of claims 8 to 11.

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