CN218586145U

CN218586145U - Apron and electricity core

Info

Publication number: CN218586145U
Application number: CN202223135908.2U
Authority: CN
Inventors: 侯明震; 李明; 汪冬冬
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-07
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a battery technology field, concretely relates to apron and electric core. The cover plate includes: the upper end surface is provided with a first side edge and a second side edge which are oppositely arranged; the first side face is fixedly connected with the first side edge and is suitable for being connected with the first side wall of the shell, and a positive pole is arranged on the first side face and is suitable for being electrically connected with the positive pole lug; the second side face is fixedly connected with the second side edge, the second side face is opposite to the first side face and is suitable for being connected with the second side wall of the shell, a negative pole post is arranged on the second side face, and the negative pole post is suitable for being electrically connected with the negative pole lug. The positive pole and the negative pole are respectively arranged on the two sides of the upper end face in the width direction, the size of the positive pole and the size of the negative pole and the size of the cross section projected on the side face are not limited by the height size of the battery cell, the size of the positive pole and the size of the negative pole need to be increased, the overcurrent capacity of the pole can also be increased, and the electrical property of the battery cell is improved.

Description

Apron and electricity core

Technical Field

The utility model relates to a battery technology field, concretely relates to apron and electric core.

Background

In the battery field, the casing structural design of monomer electricity core has important influence to the electrical property and the security performance of electricity core, also decides the final mode of uniting at the module end of electricity core simultaneously, consequently, the casing structural design of monomer electricity core has important meaning. For the design, on one hand, the height of the battery cell designed in a module is equal to the height of the shell plus the height of an upper pole of the cover plate, so that the height of the upper pole of the general cover plate is designed to be lower than a lower limit value so as to ensure the capacity of the battery cell, the overcurrent capacity of the pole is weakened, and the electrical performance is influenced; on the other hand, the positive pole, the negative pole and the explosion-proof valve are simultaneously arranged on the cover plate, so that the area of the poles is limited, the overall overcurrent capacity of the battery cell is also reduced, and the electrical property of the battery cell is prevented from being fully exerted.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the relatively poor defect of the ability of overflowing of apron structure among the prior art messenger utmost point post to a apron and electric core that can promote the ability of overflowing of utmost point post are provided.

In order to solve the above problem, the utility model provides an apron, include: the upper end surface is provided with a first side edge and a second side edge which are oppositely arranged; the first side face is fixedly connected with the first side edge and is suitable for being connected with the first side wall of the shell, and a positive pole is arranged on the first side face and is suitable for being electrically connected with the positive pole lug; the second side, with second side fixed connection, the second side with first side set up relatively and be suitable for with the second side wall of casing is connected, be provided with the negative pole post on the second side, the negative pole post is suitable for and is connected with the negative pole ear electricity.

Optionally, the positive electrode post and the negative electrode post are symmetrically arranged.

Optionally, a concave portion is formed on one side of the positive post away from the first side surface, a convex portion is formed on one side of the negative post away from the second side surface, and the size of the concave portion is the same as that of the convex portion; or a concave part is formed on one side, far away from the second side face, of the negative pole column, a convex part is formed on one side, far away from the first side face, of the positive pole column, and the size of the concave part is the same as that of the convex part.

Optionally, a groove is formed in one side, far away from the first side face, of the positive pole, and the size of the groove is the same as that of the negative pole.

Optionally, the first side further includes: the first supporting part is arranged at an interval with the positive post, and the first supporting part and the positive post are suitable for supporting the first side face.

Optionally, the second side further includes: and the second supporting part and the negative pole are arranged at intervals, and the second supporting part and the negative pole are suitable for supporting the second side surface.

Optionally, the first supporting portion and the second supporting portion are symmetrically arranged.

Optionally, the cover plate further includes: the explosion-proof valve is arranged on the upper end face.

Optionally, the cover plate further includes: and the liquid injection hole is arranged on the upper end face and is arranged at an interval with the explosion-proof valve.

The utility model also provides an electricity core, it includes: a housing, one end of which is configured as an open end; a pole set disposed within the housing; the cover plate is buckled at the opening end of the shell.

The utility model has the advantages of it is following:

1. the utility model provides an apron includes through setting up the apron up end and relative setting are in the up end both sides first side with the second side, and set up on the first side anodal post, set up on the second side the negative pole post, the realization will anodal post with the negative pole post sets up respectively the both sides of width direction are followed to the up end to the size of anodal post and negative pole post can not receive the restriction of electric core height dimension, thereby can suitably increase anodal post and negative pole post along width direction's size, increases the ability of overflowing of utmost point post, and, position space on first side and the second side is great, can increase anodal post and negative pole post projection sectional area size on the side as required, also can increase the ability of overflowing of utmost point post equally, improves the electrical property of electric core, and the same reason, anodal post and negative pole post set up and have also increased the design allowance on the electric core height direction in the both sides of apron along width direction, can more be favorable to improving electric core capacity.

2. The utility model provides an apron, through setting up the size of depressed part with the size of bellying is the same, can realize first electric core bellying joint just on the negative pole post is in the second electric core in the depressed part on the positive post to directly realize connecting between two adjacent electric cores, compare with traditional connection mode that needs use connection piece welded, reduced the quantity of spare part, reduced the operation step, improved production efficiency.

3. The cover plate provided by the utility model supports the first electric core by setting the first supporting part of the first electric core and the positive pole to be abutted against the adjacent second electric core together, so as to prevent the easy shaking of the case that only one positive pole is connected with the adjacent electric core, thereby improving the stability; the second supporting portion and the negative pole column of the first battery cell are abutted against a third battery cell so as to support the first battery cell through the second side face, and stability is further improved.

4. The utility model provides an apron, through setting up the explosion-proof valve with the positive post the negative pole post is not on the coplanar, the area of explosion-proof valve does not receive the positive post reaches the area of increase explosion-proof valve in the allowed band, when electric core takes place the thermal runaway, in time discharges high temperature high pressure flue gas through the explosion-proof valve to reduce electric core safety risk.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a schematic front view of an improved front cover plate;

FIG. 2 shows a schematic top view of the improved front cover plate of FIG. 1;

figure 3 shows a schematic front view of a cell before modification;

figure 4 shows a side view schematic of a cell before modification;

fig. 5 shows a schematic top view of a cover plate according to an embodiment of the invention;

FIG. 6 shows a schematic front view of the cover plate of FIG. 5;

FIG. 7 shows a rear schematic view of the cover plate of FIG. 5;

FIG. 8 shows a schematic side view of the cover plate of FIG. 5;

fig. 9 shows a schematic front view of a battery cell according to an embodiment of the present invention;

fig. 10 shows a side view schematic of the cell of fig. 9.

Description of the reference numerals:

10. an upper end surface; 13. an explosion-proof valve; 14. a liquid injection hole; 20. a first side; 21. a positive post; 211. a groove; 22. a first support section; 30. a second side surface; 31. a negative pole post; 32. a second support portion; 40. a housing; 41. a first side wall; 42. a second side wall.

Detailed Description

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

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

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 2, which are cover plates before improvement, and fig. 3 to 4, which are battery cores assembled by using the cover plates before improvement, the positive pole post 21, the explosion-proof valve 13, the negative pole post 31 and the liquid injection hole 14 are simultaneously located on the upper end face 10 of the cover plate, on one hand, in order to ensure the capacity of the battery core, the height of the pole is designed to be lower than a lower limit value, so that the overcurrent capacity of the pole is weakened, and the electrical performance is affected; on the other hand, the positive pole, the negative pole and the explosion-proof valve are simultaneously arranged on the cover plate, so that the area of the poles is limited, the overall overcurrent capacity of the battery cell is also reduced, and the electrical property of the battery cell is prevented from being fully exerted.

As shown in fig. 5 to 10, the cover plate of the present embodiment includes: the upper end face 10 is provided with a first side edge and a second side edge which are oppositely arranged; the first side surface 20 is fixedly connected with the first side edge and is suitable for being connected with the first side wall 41 of the shell 40, a positive pole 21 is arranged on the first side surface 20, and the positive pole 21 is suitable for being electrically connected with a positive lug; the second side surface 30 is fixedly connected with the second side edge, the second side surface 30 is opposite to the first side surface 20 and is suitable for being connected with the second side wall 42 of the shell 40, the second side surface 30 is provided with a negative pole column 31, and the negative pole column 31 is suitable for being electrically connected with a negative pole ear.

It should be noted that, the cover plate is used to cover the open end of the casing of the battery cell to seal the casing 40 and enclose the pole group in the casing 40; the upper end surface 10 refers to a surface at one end in the direction of the arrow in fig. 8 and 10; the upper end face 10 is configured as a rectangle, and the first side edge and the second side edge are two opposite edges in the rectangle, preferably two relatively long edges in the rectangle; the first side surface 20 and the second side surface 30 are arranged on two sides of the upper end surface 10 along a width direction indicated by arrows in fig. 5, the first side surface 20, the upper end surface 10 and the second side surface 30 are sequentially connected to form a body of the cover plate, the first side surface 20 and the second side surface 30 are perpendicular to the upper end surface 10, and the cross section of the cover plate body is in a U shape; the first side wall 41 and the second side wall 42 are two side walls opposite to the housing 40, and preferably, the first side wall 41 and the second side wall 42 are two of four side walls of the housing 40 with a larger area; the positive tab is a positive connection end of the pole group in the housing 40, and the negative tab is a negative connection end of the pole group.

By applying the cover plate of this embodiment, the cover plate is arranged to include the upper end surface 10 and the first side surface 20 and the second side surface 30 which are oppositely arranged on the two sides of the upper end surface 10, and the positive pole column 21 is arranged on the first side surface 20, and the negative pole column 31 is arranged on the second side surface 30, so that the positive pole column 21 and the negative pole column 31 are respectively arranged on the two sides of the upper end surface 10 along the width direction, and thus the size of the positive pole column 21 and the size of the negative pole column 31 cannot be limited by the height size of the battery cell, the size of the positive pole column 21 and the size of the negative pole column 31 along the width direction can be properly increased, the overcurrent capacity of the battery cell can be increased, and similarly, the design margins of the positive pole column 21 and the negative pole column 31 arranged on the two sides of the cover plate along the width direction are also increased, and the battery cell capacity can be more favorably improved.

Preferably, the first side surface 20 and the second side surface 30 have the same size, and the specific size is determined according to the actual condition of the battery cell; the upper end of the first side surface 20 and the upper end of the second side surface 30 are both flush with the upper surface of the upper end surface 10, wherein the upper direction refers to the direction of the arrow "upper" in fig. 8.

Specifically, the thickness of the upper end face 10 includes, but is not limited to, 0.1-10mm, the length of the upper end face 10 includes, but is not limited to, 5-100 mm, and the width of the upper end face 10 includes, but is not limited to, 5-100 mm, wherein the thickness of the upper end face 10 refers to the dimension of the upper end face 10 along the "up-down" direction indicated by the arrow in fig. 8; the length of the upper end face 10 refers to a dimension in a "length direction" direction indicated by an arrow in fig. 5; the width of the upper end face 10 refers to a dimension in a "width direction" direction indicated by an arrow in fig. 5.

Specifically, the thickness of the positive post 21 includes, but is not limited to, 0.1-10mm, the length of the positive post 21 includes, but is not limited to, 5mm-100mm, and the width of the positive post 21 includes, but is not limited to, 5mm-100mm. Wherein, the thickness of the positive post 21 refers to the dimension of the positive post 21 in the "width direction" direction indicated by the arrow in fig. 5; the length of the positive post 21 refers to the dimension of the positive post 21 in the direction along the "length direction" indicated by the arrow in fig. 5; the width of the positive post 21 refers to the dimension of the positive post 21 in the "up and down" direction indicated by the arrow in fig. 8.

Specifically, the thickness of the negative electrode post 31 includes but is not limited to 0.1-10mm, the length of the post includes but is not limited to 5-100 mm, and the width of the post includes but is not limited to 5-100 mm. Wherein the thickness of the negative electrode tab 31 refers to the dimension of the negative electrode tab 31 in the "width direction" direction indicated by the arrow in fig. 5; the length of the negative electrode tab 31 refers to the dimension of the negative electrode tab 31 in the "length direction" direction indicated by the arrow in fig. 5; the width of the negative electrode tab 31 refers to the dimension of the negative electrode tab 31 in the "up and down" direction indicated by the arrow in fig. 8.

In this embodiment, the positive post 21 and the negative post 31 are symmetrically disposed, that is, the position of the positive post 21 on the first side surface 20 is symmetrical to the position of the negative post 31 on the second side surface 30, which facilitates processing and facilitates connection between the poles of two adjacent battery cells.

In the present embodiment, a concave portion is formed on the side of the positive electrode tab 21 away from the first side surface 20, and a convex portion is formed on the side of the negative electrode tab 31 away from the second side surface 30, and the size of the concave portion is the same as that of the convex portion. Contain a plurality of electric cores, first electric core in battery module usually the negative pole post 31 with adjacent second electric core positive pole post 21 is connected, can realize the series connection of electric core, through setting up the size of depressed part with the size of bellying is the same, can realize first electric core the bellying joint just on the negative pole post 31 is in the second electric core in the depressed part on the positive pole post 21 to directly realize connecting between two adjacent electric cores, compare with traditional connection piece welded connected mode that needs use, reduced the quantity of spare part, reduced the operation step, improved production efficiency. As an alternative embodiment, a concave portion may be configured on a side of the negative electrode post 31 away from the second side surface 30, and a convex portion is configured on a side of the positive electrode post 21 away from the first side surface 20, where the size of the concave portion is the same as that of the convex portion, so that direct connection between two adjacent battery cells may also be achieved, and operation is convenient.

In this embodiment, a groove 211 is formed in one side of the positive post 21, which is far away from the first side surface 20, the size of the groove 211 is the same as that of the negative post 31, the internal volume of the groove 211 is the same as that of the negative post 31, the negative post 31 can be directly inserted into an adjacent battery cell in the groove 211 of the positive post 21, that is, the groove 211 is the concave portion, and the negative post 31 is the convex portion as a whole, so that series connection of two adjacent battery cells is realized, and the operation is simple and the processing is convenient. It is understood that, as an alternative embodiment, the groove 211 may be only configured such that the dimension of the groove 211 along the length and width directions of the positive post 21 is consistent with the length and width dimensions of the negative post 31, but the depth of the groove 211 is not limited, the negative post 31 does not need to be completely inserted into the groove, only a part of the negative post 31 is required to be inserted into the groove 211, and stable connection between the negative post 31 and the positive post of an adjacent cell can also be achieved.

Specifically, the size of the groove 211 is determined according to the actual condition of the battery cell, the thickness of the groove 211 includes, but is not limited to, 0.1-10mm, the length of the groove 211 includes, but is not limited to, 5mm-100mm, and the width of the groove 211 includes, but is not limited to, 5mm-100mm. Wherein, the thickness of the groove 211 refers to the size of the groove 211 along the width direction indicated by the arrow in fig. 5; the length of the groove 211 refers to the dimension of the groove 211 in the direction along the "length direction" indicated by the arrow in fig. 5; the width of the groove 211 refers to the dimension of the groove 211 in the "up and down" direction indicated by the arrow in fig. 8.

In this embodiment, the first side surface 20 further includes: first supporting part 22, first supporting part 22 with positive post 21 interval sets up, first supporting part 22 with positive post 21 is suitable for the support first side 20, first electric core first supporting part 22 with positive post 21 is common with adjacent second electric core butt to support first electric core, prevent that only one positive post 21 from taking place easily under the condition of being connected with adjacent electric core and rocking, improve stability. Preferably, the thickness of the first supporting part 22 is identical to the shape and size of the positive post 21, so as to facilitate processing, and the specific size is determined according to the actual condition of the battery cell. Wherein the thickness refers to the dimension in the "width direction" shown in fig. 5.

In this embodiment, the second side surface 30 further includes: the second support portion 32 is disposed at an interval from the negative pole 31, the second support portion 32 and the negative pole 31 are adapted to support the second side surface 30, and the second support portion 32 and the negative pole 31 of the first battery cell are abutted to a third battery cell so as to support the first battery cell through the second side surface, thereby further improving stability. Preferably, the second support part 32 and the negative electrode tab 31 have the same shape and size, which facilitates processing.

In this embodiment, the first supporting portion 22 and the second supporting portion 32 are symmetrically disposed, that is, the position of the first supporting portion 22 on the first side surface 20 is symmetrical to the position of the second supporting portion 32 on the second side surface 30, and the first supporting portion 22 and the positive post 21 of an adjacent electrical core are matched with each other. It should be noted that, a groove 211 is formed in the positive post 21, and a same groove is also formed in the first support portion 22 having a shape and a size identical to those of the positive post 21, so that when the negative post 31 of the first electrical core is inserted into the groove 211 of the positive post 21 of the third electrical core, the second support portion 32 is also inserted into the groove in the first support portion 22, so as to ensure that two adjacent electrical cores are parallel and stably connected. The first battery cell, the second battery cell and the third battery cell are different battery cells in a module, the second battery cell, the first battery cell and the third battery cell are sequentially arranged, and the structures of the battery cells are the same.

In this embodiment, the cover plate further includes: explosion-proof valve 13, explosion-proof valve 13 sets up on the up end 10, promptly explosion-proof valve 13 with positive post 21 negative pole post 31 is not on the coplanar, explosion-proof valve 13's area does not receive positive post 21 reaches negative pole post 31's restriction can increase explosion-proof valve 13's area in the allowed band, when electric core takes place thermal runaway, in time discharges high temperature high pressure flue gas through explosion-proof valve 13 to reduce electric core safety risk.

In this embodiment, the cover plate further includes: the electrolyte injection hole 14 is arranged on the upper end face 10 and is arranged at an interval with the anti-explosion valve 13, the electrolyte injection hole 14 is used for injecting electrolyte into the battery cell, and the electrolyte can be prevented from splashing on the pole when injecting the electrolyte by arranging the electrolyte injection hole 14 and the positive/negative pole on different surfaces, so that the pole is prevented from being corroded by the electrolyte, and the safety of the battery cell is improved.

The utility model also provides an electricity core, it includes: the shell 40, the pole group and the cover plate, wherein one end of the shell 40 is an opening end; the pole group is arranged in the shell; the cover snaps over the open end of the housing to close the housing 40 and enclose the pole set within the housing.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

include up end 10 and be located through setting up the apron first side 20 and the second side 30 of up end 10 both sides, and set up positive post 21 on the first side 20 set up negative pole post 31 on the second side 30, can increase utmost point post height, promote utmost point post overcurrent capacity, can increase explosion-proof valve 13's open area simultaneously, can also reduce module assembly step, both promoted the security performance and the electrical property of electric core, promoted work efficiency simultaneously, reduce the time cost.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A cover plate, comprising:

the upper end face (10) is provided with a first side edge and a second side edge which are oppositely arranged;

the first side face (20) is fixedly connected with the first side edge and is suitable for being connected with a first side wall (41) of the shell (40), a positive pole column (21) is arranged on the first side face (20), and the positive pole column (21) is suitable for being electrically connected with a positive pole lug;

the second side face (30) is fixedly connected with the second side edge, the second side face (30) is opposite to the first side face (20) and is suitable for being connected with a second side wall (42) of the shell (40), a negative pole column (31) is arranged on the second side face (30), and the negative pole column (31) is suitable for being electrically connected with a negative pole lug.

2. The cover sheet according to claim 1, wherein the positive post (21) is arranged symmetrically to the negative post (31).

3. The cover sheet according to claim 1, wherein the positive post (21) is configured with a recess on the side away from the first side surface (20), and the negative post (31) is configured with a protrusion on the side away from the second side surface (30), the recess having the same size as the protrusion;

or a concave part is formed on one side, far away from the second side face (30), of the negative pole column (31), a convex part is formed on one side, far away from the first side face (20), of the positive pole column (21), and the size of the concave part is the same as that of the convex part.

4. The cover plate according to claim 3, characterized in that the side of the positive post (21) remote from the first side face (20) is configured with a groove (211), the size of the groove (211) being the same as the size of the negative post (31).

5. The cover sheet according to claim 1, further comprising on the first side (20): the first supporting part (22), first supporting part (22) with positive post (21) interval sets up, first supporting part (22) with positive post (21) are suitable for supporting first side (20).

6. The cover sheet according to claim 5, characterized in that it further comprises on said second side (30): a second support (32), the second support (32) being spaced from the negative post (31), the second support (32) and the negative post (31) being adapted to support the second side surface (30).

7. The decking of claim 6, wherein the first support (22) is arranged symmetrically with respect to the second support (32).

8. The cover sheet according to any one of claims 1 to 7, further comprising: the explosion-proof valve (13), explosion-proof valve (13) set up on up end (10).

9. The cover sheet of claim 8, further comprising: and the liquid injection hole (14) is formed in the upper end face (10) and is arranged at an interval with the explosion-proof valve (13).

10. A battery cell, comprising:

a housing (40) having one end configured as an open end;

a pole set disposed within the housing;

the cover of any one of claims 1-9, which is snap-fitted to the open end of the housing.