CN215989136U - Battery cell top cap, battery cell and vehicle - Google Patents

Abstract

The application relates to the technical field of batteries, in particular to a battery cell top cover, a battery cell and a vehicle, which comprise a cover plate, a connecting sheet, a first pole and a second pole; the first pole column and the second pole column are connected with the cover plate in an insulating mode, one end of the first pole column is electrically connected with one end of the second pole column through the connecting piece, and the other end of the first pole column is in contact with the electrolyte. The utility model provides an aim at's this application aim at to the utmost point post diameter that adopts when current blade electricity core thickness is less, has reduced the welding area between utmost point post and the connection piece, produces adverse effect's problem to the current capacity of electric core, provides an electric core top cap, electric core and vehicle.

Description

Battery cell top cap, battery cell and vehicle

Technical Field

The application relates to the technical field of batteries, in particular to an electric core top cover, an electric core and a vehicle.

Background

With the increasing maturity of lithium ion battery technology, lithium ion batteries are widely used in the fields of electric vehicles and energy storage as power batteries, and the requirements on the service performance and safety of the lithium ion batteries are increasing.

The lithium cell top cap is as an accessory in the lithium ion battery, and its effect makes interior external environment isolated play sealed effect at first through welding with the aluminum hull after, and secondly connects interior outer circuit, carries the outside through the top cap utmost point post to battery internal current, plays the water conservancy diversion effect.

Traditional blade electricity core top cap is generally just, the negative pole all only has a utmost point post, utmost point post and connection piece welding, and electric core passes through connection piece and external electrical contact, and when electric core thickness was less than certain numerical value, it was less to need corresponding utmost point post diameter, and this has reduced the welding area between utmost point post and the connection piece, produces adverse effect to the ability of overflowing of electric core.

SUMMERY OF THE UTILITY MODEL

The utility model provides an aim at is less to the utmost point post diameter that adopts when current blade electricity core thickness is less, has reduced the welding area between utmost point post and the connection piece, produces adverse effect's problem to the ability of overflowing of electric core, provides an electricity core top cap, electric core and vehicle.

In order to achieve the purpose, the following technical scheme is adopted in the application:

one aspect of the application provides a cell top cover, which comprises a cover plate, a connecting sheet, a first pole and a second pole; the first pole column and the second pole column are all in insulation connection with the cover plate, one end of the first pole column is electrically connected with one end of the second pole column through the connecting sheet, and the other end of the first pole column and the other end of the second pole column are all used for being connected with the pole group.

Optionally, the first pole and the second pole are arranged in a length direction of the connecting piece.

The technical scheme has the beneficial effects that: in order to adapt to the flat structure of blade, the connection piece also can design into rectangular form usually, make first utmost point post and second utmost point post arrange in the length direction of connection piece, the length space that the utilization connection piece that can be more reasonable occupied on the one hand, on the other hand can normally be connected in order to guarantee connection piece and utmost point post, the width of connection piece has actually formed the restriction to the maximum diameter of utmost point post, make first utmost point post and second utmost point post arrange in the length direction of connection piece, then can make the diameter of single utmost point post be as big as possible in the width scope of connection piece, and then through the area of contact of single utmost point post with the connection piece of increase, increase the area of contact of all utmost point posts and connection piece, further improve the ability of overflowing of electric core.

Optionally, one end of the first pole column, which is used for being in contact with the electrolyte, is a first end, one end of the second pole column, which is used for being connected with the pole group, is a second end, and the first end and the second end are separated from each other.

The technical scheme has the beneficial effects that: make first end and second end relative separation, then can increase the total area of first utmost point post, second utmost point post and electrolyte contact for making first end and second end link together, and then increase the power supply ability of electricity core.

Optionally, the first pole is mounted at one end of the connecting sheet in the length direction, and the second pole is mounted at the other end of the connecting sheet in the length direction.

The technical scheme has the beneficial effects that: therefore, the distance between the first end and the second end is as far as possible, namely the first end and the second end are independently applied to one area respectively in the electrolyte, the ion quantity provided in unit time is relatively sufficient, and the power supply capacity of the battery cell can be improved.

Optionally, the device further comprises a second insulating gasket, wherein the second insulating gasket covers the cover plate to separate the cover plate from the pole group; the first end and the second end are embedded in the second insulating gasket.

Optionally, the second insulating spacer includes an isolation protrusion for separating the first end and the second end in a length direction of the connecting tab.

Optionally, the connecting sheet further comprises a first insulating pad, the connecting sheet has a first surface for facing the cover plate, the first insulating pad covers the first surface, a first through hole matched with the first pole column is formed in the first insulating pad, and a second through hole matched with the second pole column is further formed in the first insulating pad.

The technical scheme has the beneficial effects that: of course, an insulating pad isolation cover plate and a connecting sheet can be arranged at the position of each pole column independently, but the problem that the cover plate is electrically connected with the connecting sheet due to the fact that foreign matters enter the gap between two adjacent insulating pads is difficult to avoid. And make first insulating gasket cover first face as a whole, then isolated apron and connection piece on the whole, make between apron and the connection piece difficult even electricity, the first through-hole and the second through-hole that set up specially then can make first utmost point post and second utmost point post homoenergetic be connected with the apron electricity.

Optionally, the first pole comprises a first main body part and a third end which are coaxially arranged, the third end is connected to one side of the first main body part, which is far away from the cover plate, a first stepped hole is formed in the connecting piece, a part with a smaller diameter of the first stepped hole is arranged close to the cover plate, the third end is matched with a part with a larger diameter of the first stepped hole, and the first main body part is matched with the part with a smaller diameter of the first stepped hole;

and/or, the second pole is including coaxial second main part and the fourth end that sets up, the fourth end connect in deviating from of second main part one side of apron be formed with second step hole on the connecting piece, the less part of diameter in second step hole is close to the apron sets up, the fourth end with the major part cooperation of diameter in second step hole, the second main part with the less part cooperation of diameter in second step hole.

Another aspect of the present application provides a battery cell including a cell cap as provided by embodiments of the present application.

A third aspect of the present application provides a vehicle including the battery cell provided in the embodiment of the present application.

The technical scheme provided by the application can achieve the following beneficial effects:

compared with the existing battery core top cover, the battery core and the vehicle provided by the embodiment of the application, the battery core top cover comprises at least two polar columns at the positive pole, and the connecting sheets connect the polar columns together at the positive pole to form the positive pole, so that the contact area between the polar columns and the connecting sheets is increased, and the overcurrent capacity of the battery core is further improved; similarly, compared with the existing cell top cover, the battery cell top cover can also comprise at least two poles at the negative pole, and the connecting sheet at the negative pole connects the poles together to form the negative pole, so that the overcurrent capacity of the cell can be increased.

Additional features of the present application and advantages thereof will be set forth in the description which follows, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It should be apparent that the drawings in the following description are embodiments of the present application and that other drawings may be derived from those drawings by a person of ordinary skill in the art without inventive step.

Fig. 1 is a schematic front view cross-sectional structural diagram of an embodiment of a cell top cover provided in an embodiment of the present application;

fig. 2 is a schematic top view structure diagram of an embodiment of a cell top cover provided in an embodiment of the present application;

fig. 3 is a schematic bottom view of a cell top cover according to an embodiment of the present disclosure;

fig. 4 is a schematic perspective view of an angle of an embodiment of a cell top cover provided in an embodiment of the present application;

fig. 5 is a schematic perspective view of another angle of an implementation manner of a cell top cover according to an embodiment of the present application.

Reference numerals:

100-a first pole;

110-a third end;

120-a first body portion;

130-a first end;

200-a second pole;

210-a fourth end;

220-a second body portion;

230-a second end;

300-connecting pieces;

400-cover plate;

500-a first insulating pad;

510-an isolation bump;

600-an explosion-proof valve;

700-second insulating spacer.

Detailed Description

The technical solutions of the present application will be described 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 application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, 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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. 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 application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 to 5, one aspect of the present application provides a cell top cap, which includes a cover plate 400, a connecting sheet 300, a first pole post 100, and a second pole post 200; the first pole post 100 and the second pole post 200 are both in insulation connection with the cover plate 400, one end of the first pole post 100 is electrically connected with one end of the second pole post 200 through the connecting sheet 300, and the other end of the first pole post 100 is connected with the other end of the second pole post 200 through the pole group. In this embodiment, the other end of the first electrode post 100 and the other end of the second electrode post 200 are both used for contacting with the electrolyte.

It is understood that the connecting piece 300 is insulated from the cover plate 400; in the embodiment of the present application, the cover plate 400 is preferably a smooth aluminum sheet; an explosion-proof valve 600 is also preferably formed on the cover plate 400.

Compared with the existing battery cell top cover, the battery cell top cover provided by the embodiment of the application comprises at least two polar columns at the positive pole, and the connecting sheet 300 connects the polar columns together at the positive pole to form the positive pole, so that the contact area between the polar columns and the connecting sheet 300 is increased, and the overcurrent capacity of the battery cell is further improved; similarly, compared with the existing cell top cover, the battery can also comprise at least two poles at the negative pole, and the connecting sheet 300 at the negative pole connects the poles together to form the negative pole, which can also increase the overcurrent capacity of the cell.

Optionally, the first pole post 100 and the second pole post 200 are arranged in a length direction of the connecting piece 300. In order to adapt to the flat structure of the blade, the connecting sheet 300 is usually designed into a long strip shape, so that the first pole column 100 and the second pole column 200 are arranged in the length direction of the connecting sheet 300, on one hand, the length space occupied by the connecting sheet 300 can be reasonably utilized, on the other hand, in order to ensure that the connecting sheet 300 can be normally connected with the pole columns, the width of the connecting sheet 300 actually limits the maximum diameter of the pole columns, so that the first pole column 100 and the second pole column 200 are arranged in the length direction of the connecting sheet 300, the diameter of a single pole column can be as large as possible in the width range of the connecting sheet 300, and further, by increasing the contact area of the single pole column and the connecting sheet 300, the contact area of all the pole columns and the connecting sheet 300 is increased, and the overcurrent capacity of the battery cell is further improved.

Optionally, one end of the first pole post 100, which is used for being connected with the pole set, is a first end 130, one end of the second pole post 200, which is used for being connected with the pole set, is a second end 230, and the first end 130 and the second end 230 are separated from each other. Compared with the method that the first end 130 and the second end 230 are connected together, and the first end 130 and the second end 230 are relatively separated, the total contact area of the first pole post 100, the second pole post 200 and the electrolyte can be increased, and the power supply capacity of the battery cell is further increased. Of course, the first end 130 and the second end 230 may be integrally connected together.

If the first end 130 and the second end 230 are arranged more intensively in the electrolyte, the total amount of ions that can be provided by the first end 130 and the second end 230 in the same area per unit time is limited, which may adversely affect the power supply capability, corresponding to the fact that the first end 130 and the second end 230 share the same area in the electrolyte. In the embodiment of the present application, optionally, the first terminal post 100 is installed at one end of the connecting piece 300 in the length direction, and the second terminal post 200 is installed at the other end of the connecting piece 300 in the length direction. Therefore, the distance between the first end 130 and the second end 230 is as far as possible, which is equivalent to that the first end 130 and the second end 230 are independently applied to one region in the electrolyte respectively, and the amount of ions provided in unit time is relatively sufficient, so that the power supply capacity of the cell can be improved. Of course, the first end 130 and the second end 230 may also be arranged in a relative concentration.

In order to enable the first end 130 and the second end 230 to be in a separated state more stably in the electrolyte, in the embodiment of the present application, optionally, the cell top cap provided in the embodiment of the present application further includes a first insulating gasket 500, and the first insulating gasket 500 covers the cover plate 400 to separate the cover plate 400 from the pole group; the first end 130 and the second end 230 are embedded in the first insulating pad 500.

As shown in fig. 3 and fig. 5, optionally, in the cell top cap provided in the embodiment of the present application, the first insulating gasket 500 includes an isolation protrusion 510, and the isolation protrusion 510 is used to separate the first end 130 and the second end 230 in a length direction of the connecting piece 300.

Optionally, the cell top cap provided by the embodiment of the present application further includes a second insulating spacer, the connecting sheet 300 has a first surface for facing the cover plate 400, the second insulating spacer 700 covers the first surface, a first through hole matched with the first terminal 100 is formed on the second insulating spacer 700, and a second through hole matched with the second terminal 200 is further formed on the second insulating spacer 700. Of course, an insulating pad isolation cover plate 400 and a connecting plate 300 can be separately arranged at the position of each pole, but it is difficult to avoid the problem that a large gap is formed between two adjacent insulating pads, and foreign matters enter the gap to electrically connect the cover plate 400 and the connecting plate 300. And make second insulating gasket 700 cover first face as a whole, then isolated apron 400 and connection piece 300 on the whole, make between apron 400 and the connection piece 300 difficult even electricity, the first through-hole and the second through-hole that set up specially then can make first utmost point post 100 and second utmost point post 200 homoenergetic be connected with apron 400 electricity.

Optionally, the first pole post 100 includes a first main body part 120 and a third end 110, which are coaxially disposed, the third end 110 is connected to a side of the first main body part 120 facing away from the cover plate 400, a first stepped hole is formed on the connecting plate 300, a smaller diameter portion of the first stepped hole is disposed close to the cover plate 400, the third end 110 is engaged with a larger diameter portion of the first stepped hole, and the first main body part 120 is engaged with the smaller diameter portion of the first stepped hole;

and/or, the second pole 200 includes the second main body portion 220 and the fourth end 210 that set up coaxially, the fourth end 210 connect in deviating from of second main body portion 220 one side of apron 400 be formed with the second step hole on the connection piece 300, the diameter minor part in second step hole is close to the apron 400 sets up, the fourth end 210 with the diameter major part cooperation in second step hole, the second main body portion 220 with the diameter minor part cooperation in second step hole.

Another aspect of the present application provides a battery cell including a cell cap as provided by embodiments of the present application.

The battery cell provided by the embodiment of the application adopts the battery cell top cover provided by the embodiment of the application, and compared with the existing battery cell top cover, the battery cell top cover enables the positive pole to comprise at least two poles, and the connecting sheet 300 connects the poles together at the positive pole to form the positive pole, so that the contact area between the poles and the connecting sheet 300 is increased, and the overcurrent capacity of the battery cell is further improved; similarly, compared with the existing cell top cover, the battery can also comprise at least two poles at the negative pole, and the connecting sheet 300 at the negative pole connects the poles together to form the negative pole, which can also increase the overcurrent capacity of the cell.

A third aspect of the present application provides a vehicle including the battery cell provided in the embodiment of the present application.

The vehicle provided by the embodiment of the application adopts the battery cell provided by the embodiment of the application, and compared with the existing battery cell top cover, the vehicle comprises at least two poles at the positive pole, and the connecting sheet 300 connects the poles together at the positive pole to form the positive pole, so that the contact area between the poles and the connecting sheet 300 is increased, and the overcurrent capacity of the battery cell is further improved; similarly, compared with the existing cell top cover, the battery can also comprise at least two poles at the negative pole, and the connecting sheet 300 at the negative pole connects the poles together to form the negative pole, which can also increase the overcurrent capacity of the cell.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The battery cell top cover is characterized by comprising a cover plate (400), a connecting sheet (300), a first pole column (100) and a second pole column (200); the first pole column (100) and the second pole column (200) are connected with the cover plate (400) in an insulating mode, one end of the first pole column (100) is electrically connected with one end of the second pole column (200) through the connecting piece (300), and the other end of the first pole column (100) is connected with the other end of the second pole column (200) in a pole group mode.

2. The cell cap according to claim 1, characterized in that the first pole (100) and the second pole (200) are arranged in the length direction of the connecting tab (300).

3. The cell header as recited in claim 1, characterized in that the end of the first terminal post (100) for connection to the pole group is a first end (130), the end of the second terminal post (200) for connection to the pole group is a second end (230), and the first end (130) and the second end (230) are separated from each other.

4. The cell cap according to claim 3, wherein the first terminal post (100) is mounted at one end of the connecting sheet (300) in the length direction, and the second terminal post (200) is mounted at the other end of the connecting sheet (300) in the length direction.

5. The cell header of claim 3, further comprising a first insulating gasket (500), the first insulating gasket (500) overlying the cover plate (400) to separate the cover plate (400) from the pole group; the first end (130) and the second end (230) are embedded in the first insulating pad (500).

6. The cell header as recited in claim 5, wherein the first insulating gasket (500) comprises an isolation bump (510), the isolation bump (510) being configured to separate the first end (130) and the second end (230) in a length direction of the connecting tab (300).

7. The cell cap according to any of claims 1 to 6, further comprising a second insulating spacer (700), wherein the connecting piece (300) has a first surface for facing the cover plate (400), the second insulating spacer (700) covers the first surface, a first through hole for fitting the first pole (100) is formed in the second insulating spacer (700), and a second through hole for fitting the second pole (200) is formed in the second insulating spacer (700).

8. The cell cover according to any one of claims 1 to 6, wherein the first terminal post (100) comprises a first main body part (120) and a third end (110) which are coaxially arranged, the third end (110) is connected to the side, facing away from the cover plate (400), of the first main body part (120), a first stepped hole is formed in the connecting plate (300), the smaller diameter part of the first stepped hole is arranged close to the cover plate (400), the third end (110) is matched with the larger diameter part of the first stepped hole, and the first main body part (120) is matched with the smaller diameter part of the first stepped hole;

and/or, second utmost point post (200) is including coaxial second main part and the fourth end (210) that sets up, fourth end (210) connect in deviating from of second main part one side of apron (400) be formed with the second step hole on connection piece (300), the less part in diameter in second step hole is close to apron (400) setting, fourth end (210) with the major part cooperation in diameter in second step hole, the second main part with the less part cooperation in diameter in second step hole.

9. A cell, characterized in that it comprises a cell cover according to any of claims 1 to 8.

10. Vehicle, characterized in that it comprises a cell as claimed in claim 9.

Images