CN217426930U

CN217426930U - Battery core

Info

Publication number: CN217426930U
Application number: CN202220983802.9U
Authority: CN
Inventors: 曲凡多
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-09-13
Anticipated expiration: 2032-04-25

Abstract

The application relates to battery technology field, especially relates to a battery electric core, and the battery electric core includes: the inner part of the shell is hollow to form a coating space; the battery cell pole group is arranged in the cladding space; the output pole assembly is arranged in the middle of the battery core pole group and at least comprises an output anode and an output cathode which are arranged at intervals. The application provides a battery electric core, with the output utmost point subassembly setting of electric core in the middle position of electric core utmost point group, the positive output utmost point and the negative output level of output utmost point subassembly also set up the intermediate position at electric core utmost point group, both intervals set up and distance between the two is less, be convenient for busbar, sampling etc. connect and arrange trend etc. the signal acquisition of being convenient for.

Description

Battery core

Technical Field

The application relates to the technical field of batteries, in particular to a battery cell.

Background

At present, current electric core sets up the output utmost point (be divided into output positive pole and output negative pole) at electric core length direction's both ends usually, make the span of output utmost point great, and include a plurality of electric cores in the battery module usually, still need carry out the connection of converging through the cross-over busbar after connecting the positive output utmost point and the negative output level of each electric core through the busbar, in addition the output utmost point still need be connected with sampling etc. this just can not avoid needing the cross-over busbar to have longer length, the trend of sampling, arrange also comparatively complicacy, all have the influence of certain degree to signal acquisition etc. also influence follow-up to the busbar, the maintenance of electric core output utmost point etc. when electric core is the longer long electric core of length, these problems just seem extraordinarily outstanding.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a battery electricity core to it is big to solve the output pole span of current battery electricity core that exists among the prior art to a certain extent, influences signal acquisition, moreover the difficult technical problem of maintenance of output pole.

The application provides a battery electric core, include: the shell is hollow inside and forms a coating space;

a cell pole group disposed within the cladding space;

the output pole assembly is arranged in the middle of the battery core pole group and at least comprises an output positive pole and an output negative pole which are arranged at intervals.

In the foregoing technical solution, further, the cell pole group includes:

a first pole group including a first positive pole and a first negative pole;

a second pole group including a second positive pole and a second negative pole; the first pole group and the second pole group are arranged at intervals along a first direction;

the first anode and the first cathode are arranged at one end of the first pole group close to the second pole group; the second anode and the second cathode are arranged at one end of the second pole group close to the first pole group.

In any of the above technical solutions, further, the housing includes:

the first shell is provided with a first opening, and the first pole group is arranged in the first shell;

the second shell is provided with a second opening, and the second pole group is arranged in the second shell;

the first opening is arranged right opposite to the second opening.

In any of the above technical solutions, further, the output pole assembly includes:

the first positive electrode and the second positive electrode are connected through the positive electrode lug;

the first negative electrode is connected with the second negative electrode through the negative electrode tab;

the first current collector is connected with the positive electrode lug;

and the second current collector is connected with the negative pole lug.

In any one of the above technical solutions, further, the battery cell further includes a cover plate, and the cover plate is provided with a positive pole and a negative pole;

one end of the first current collector, which is far away from the positive electrode lug, is connected with the positive electrode post;

and one end of the second current collector, which is far away from the negative electrode lug, is connected with the negative electrode column.

In any one of the above technical solutions, further, the battery electric core further includes:

the first insulating piece is arranged between the second current collector and the positive electrode lug;

and the second insulating part comprises a first wall part and a second wall part, the first wall part covers the first current collector, and the second wall part covers the second current collector.

In any of the above technical solutions, further, the first current collector includes a first connection portion and a second connection portion that are arranged at an angle, the first connection portion extends along a second direction different from the first direction, the second connection portion is located between the cover plate and the mounting portion, and the second connection portion extends toward the positive post;

the second mass flow body is including the third connecting portion and the fourth connecting portion that the angle set up, the third connecting portion are followed the second direction extends, the fourth connecting portion are located the apron with between the installation department, the fourth connecting portion orientation the negative pole post extends.

In any one of the above technical solutions, further, the first pole group is formed with a first step portion, the second pole group is formed with a second step portion, the first step portion and the second step portion together form a mounting portion, and the cover plate is disposed on the mounting portion;

the shell is provided with an avoiding part, and the shape of the avoiding part is matched with that of the cover plate.

In any of the above technical solutions, further, the thickness of the cover plate is smaller than the depth of the mounting portion, so that the outer surface of the cover plate is recessed with respect to the surface of the housing.

In any of the above technical solutions, further, the housing is provided with an explosion-proof valve.

Compared with the prior art, the beneficial effect of this application is:

the application provides a battery electric core includes: the inner part of the shell is hollow to form a coating space; the battery cell pole group is arranged in the cladding space; the output pole assembly is arranged in the middle of the battery core pole group and at least comprises an output anode and an output cathode which are arranged at intervals.

The application provides a battery electric core, with the output utmost point subassembly setting of electric core in the middle position of electric core utmost point group, the positive output utmost point and the negative output utmost point of output utmost point subassembly also set up the intermediate position at electric core utmost point group, both intervals set up and distance between the two is less, be convenient for busbar, sampling etc. connect and arrange trend etc. the signal acquisition of being convenient for.

Drawings

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

Fig. 1 is an exploded view of a battery cell provided in an embodiment of the present application;

fig. 2 is a schematic view of a battery cell provided in an embodiment of the present application;

fig. 3 is a schematic view of another view of a battery cell provided in an embodiment of the present application;

fig. 4 is a cross-sectional view of a battery cell provided in an embodiment of the present application from a viewing angle.

Reference numerals: 1-a first shell, 101-a first opening, 102-a first avoiding portion, 2-a second shell, 201-a second avoiding portion, 3-a first pole group, 301-a first step portion, 4-a second pole group, 401-a second step portion, 5-a mounting portion, 6-a positive pole tab, 7-a negative pole tab, 8-a first current collector, 801-a first connecting portion, 802-a second connecting portion, 9-a second current collector, 901-a third connecting portion, 902-a fourth connecting portion, 10-a first insulating member, 11-a second insulating member, 1101-a first wall portion, 1102-a second wall portion, 1103-a bottom wall portion, 12-a cover plate, 1201-a positive pole column, 1202-a negative pole column, 13-an explosion-proof valve, a-a first direction, b-a second direction.

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.

The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

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 this application will be understood to be a specific case for those of ordinary skill in the art.

A battery cell according to an embodiment of the present application is described below with reference to fig. 1 to 4.

Referring to fig. 1 to 4, an embodiment of the present application provides a battery cell, including a housing, a cell pole group and an output pole assembly, a cladding space is formed inside the housing, the cell pole group is disposed in the cladding space to form a main body of the battery cell, the cell pole group is provided with the output pole assembly, it should be noted that, the battery cell in the embodiment of the present application may specifically be a long battery cell with a large size, such as a length, and the battery cell has a rectangular parallelepiped structure, the output pole assembly is disposed at a central position of the cell pole group, the output pole assembly at least includes an output positive pole and an output negative pole which are close to each other, and thus, the output positive pole and the output negative pole are also disposed at an intermediate position of the cell pole group.

Specifically, the housing includes a first housing 1 and a second housing 2, the first housing 1 and the second housing 2 may each have a rectangular parallelepiped structure and be hollow inside, the first housing 1 and the second housing 2 each have a rectangular parallelepiped structure, the first housing 1 is formed with a first opening 101, the second housing 2 is formed with a second opening, the first housing 1 and the second housing 2 are distributed in a line shape along a first direction a, and the first opening 101 and the second opening are disposed opposite to each other.

As shown in fig. 1, the first direction a is the longitudinal direction of the first casing 1 and the second casing 2, the longitudinal direction of the two wall surfaces with the largest area of the first casing 1 extends along the first direction a, and the width direction is distributed along the vertical direction; the other two wall surfaces of the first casing 1 extending in the first direction a are respectively an upper wall surface and a lower wall surface, and the second casing 2 is the same.

Further, a portion of the upper wall surface of the first housing 1 close to the first opening 101 forms a first escape portion 102, a portion of the upper wall surface of the second housing 2 close to the second opening forms a second escape portion 201, and the first escape portion 102 and the second escape portion 201 are used for accommodating a cover plate 12 described below.

Further, the cell pole group includes a first pole group 3 and a second pole group 4, the first pole group 3 and the second pole group 4 both have a rectangular parallelepiped structure, and the shape of the first pole group 3 is adapted to the shape of the inner space of the first casing 1, and the shape of the second pole group 4 is adapted to the shape of the inner space of the second casing 2, so that the first pole group 3 can be disposed in the first casing 1 through the first opening 101 and protected by the first casing 1, and the second pole group 4 can be disposed in the second casing 2 through the second opening and protected by the second casing 2.

It should be noted that, the number of the first pole groups 3 and the number of the second pole groups 4 are the same and are at least one, and as fig. 1 shows an example that the number of the first pole groups 3 and the number of the second pole groups 4 are both one, when the number of the first pole groups 3 and the number of the second pole groups 4 are more than one, the position of the output pole assembly is taken as a central line, the plurality of first pole groups 3 are all arranged on one side of the output pole assembly, the plurality of second pole groups 4 are all arranged on the other side of the output pole assembly, and the plurality of first pole groups 3 may be directly connected together or may be integrated by welding. The same applies to the second pole groups 4, and will not be described again.

Further, the vertex angle of the upper end of the first pole group 3 on the side close to the second pole group 4 is notched, so that the first pole group 3 forms a first step portion 301 at the position corresponding to the first escape portion 102, similarly, the vertex angle of the upper end of the second pole group 4 on the side close to the first pole group 3 is notched, so that the second pole group 4 forms a second step portion 401 at the position corresponding to the second escape portion 201, the first step portion 301 and the second step portion 401 together form an installation portion 5 having a rectangular parallelepiped notched structure, and the installation portion 5 is used for installing a cover plate 12 described below.

Further, a side wall face that first utmost point group 3 is close to second utmost point group 4 is provided with first positive pole and first negative pole from top to bottom interval, a side wall face that second utmost point group 4 is close to first utmost point group 3 is provided with the second positive pole and second negative pole from top to bottom interval, interval between first utmost point group 3 and the second utmost point group 4 is used for holding, installation output pole subassembly, it is visible, the battery electric core that this application provided, first utmost point group 3 is mirror symmetry setting with second utmost point group 4, and output pole subassembly is located the holistic intermediate position of battery electric core.

Further, the output pole assembly comprises an anode tab 6, a cathode tab 7, a first current collector 8 and a second current collector 9, wherein the anode tab 6 and the cathode tab 7 are arranged between the first pole group 3 and the second pole group 4 at intervals from top to bottom, the left side edge of the anode tab 6 is connected with the first anode, the right side edge of the anode tab 6 is connected with the second anode, the left side edge of the cathode tab 7 is connected with the first cathode, and the right side edge of the cathode tab 7 is connected with the second cathode.

The first current collector 8 and the second current collector 9 are respectively disposed on both sides of the positive electrode tab 6 (and the negative electrode tab 7), the first current collector 8 has an L-shaped structure, and includes a first connection portion 801 and a second connection portion 802 that are disposed perpendicular to each other, the first connection portion 801 extends in the second direction b, that is, the vertical direction in the state shown in fig. 1, and is connected to the positive electrode tab 6, and the second connection portion 802 is disposed at the second step portion 401 and extends in the first direction a.

The second current collector 9 also has an L-shaped structure, and includes a third connection portion 901 and a fourth connection portion 902 that are disposed perpendicular to each other, the third connection portion 901 extending in the vertical direction and being connected to the negative electrode tab 7, and the fourth connection portion 902 being disposed on the first step portion 301 and extending in the direction opposite to the first direction a.

Preferably, the length of the first connection portion 801 is shorter than that of the third connection portion 901, so as to ensure that the first connection portion 801 is connected with the positive electrode tab 6 positioned above and does not contact with the negative electrode tab 7 on one side of the positive electrode tab 6, the length of the third connection portion 901 is shorter, the third connection portion 901 is connected with the negative electrode tab 7 positioned below on the other side of the positive electrode tab 6, namely, on one side away from the first connection portion 801, and a first insulating member 10 is arranged between the third connection portion 901 and the positive electrode tab 6, the first insulating member 10 has a sheet structure, so that the third connection portion 901 is connected with the negative electrode tab 7 while ensuring insulation between the third connection portion 901 and the positive electrode tab 6, and short circuit is avoided.

Further, the battery cell provided by the embodiment of the present application further includes a second insulating member 11, preferably, the second insulating member 11 has a U-shaped structure, and includes a first wall 1101 and a second wall 1102 facing each other, and a bottom wall 1103 disposed on the first wall 1101 and the second wall 1102 and connecting the first wall 1101 and the second wall 1102, where the first wall 1101 covers the first connecting portion 801, the positive electrode tab 6, and the negative electrode tab 7 on one side, the bottom wall 1103 covers the negative electrode tab below the negative electrode post, and the second wall 1102 covers the third connecting portion 901, the positive electrode tab 6, and the negative electrode tab 7 on the other side, so as to ensure that the output electrode assembly is insulated from the first casing 1, the second casing 2, and the external space.

Further, the battery electric core provided by the embodiment of the application further includes a cover plate 12, the shape of the cover plate 12 is adapted to the shape of the mounting portion 5, a negative pole 1202 and a positive pole 1201 are arranged on the cover plate 12 at intervals along the length direction (in the same direction as the first direction a) of the cover plate 12, the negative pole 1202 is in contact with and conducted with the fourth connecting portion 902, and the positive pole 1201 is in contact with and conducted with the second connecting portion 802, so that the positive pole 1201 and the negative pole 1202 can be respectively used as an external output positive pole and an external output negative pole for connecting a busbar and the like.

Preferably, the thickness of the cover plate 12 is smaller than the depth of the mounting portion 5, so that after the cover plate 12 is fixed into the mounting portion 5, the outer surface of the cover plate 12 is recessed relative to the upper surfaces of the first and second casings 1 and 2, so that the present battery cell is similarly shaped like a "concave" overall, thereby avoiding the protrusion of the height of the positive and

negative posts

1201 and 1202 connected thereto relative to the surface of the casing at the PaCK level.

It should be noted that, the first shell 1 and the second shell 2 both include five wall surfaces, and may be obtained by pushing out a direct deep drawing manner, or may be obtained by performing back cover welding after extrusion. After the assembly of the first pole group 3, the first shell 1, the second pole group 4, the second shell 2 and the output pole assembly is completed, the butt joint between the first shell 1 and the second shell 2 and the cover plate 12 and the installation part 5 are welded, and the integral sealing of the battery cell can be realized.

Further, in the state shown in fig. 3, the housing is provided with the explosion-proof valve 13, preferably, the explosion-proof valve 13 is arranged at the bottom of the housing, more preferably, the explosion-proof valve 13 is arranged at the middle position of the bottom wall surface of the housing, that is, the position where the bottom wall surfaces of the first housing 1 and the second housing 2 are butted against each other, which is closer to the output pole assembly, and when one or more of the output pole assemblies generates heat so that the pressure inside the housing is increased, the pressure and the heat can be discharged through the explosion-proof valve 13 in time.

To sum up, the battery electricity core that this application provided sets up the output utmost point subassembly of electric core at the position placed in the middle of electric core utmost point group, and the positive output utmost point and the negative output level of output utmost point subassembly also set up the intermediate position at electric core utmost point group, and both intervals set up and distance between the two is less, and the busbar of being convenient for, sampling etc. are connected and are arranged trend etc. the signal acquisition of being convenient for.

In addition, the positive output electrode and the negative output electrode use the same cover plate, and compared with the situation that two ends of the existing electric core are respectively provided with the positive electrode and the negative electrode, the using amount of the cover plate is greatly reduced, and the light weight design of the power battery is facilitated. Compared with the design of a centralized output electrode, the design of the centered output electrode can effectively reduce the condition of uneven current density distribution.

The embodiment of this application still provides a power battery, including above-mentioned any embodiment battery electricity core to the quantity of the battery electricity core that contains among the power battery is a plurality of, and the output pole (positive post, negative pole post) of each electricity core all sets up the position placed in the middle at electric core, can optimize the inside configuration optimization of power battery through the position that changes positive post and negative pole post, thereby can improve the utilization ratio of the whole package volume of power battery.

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 these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell, comprising:

the shell is hollow inside and forms a coating space;

a cell pole group disposed within the cladding space;

2. The battery cell of claim 1, wherein the cell pole group comprises:

a first pole group including a first positive pole and a first negative pole;

the first positive electrode and the first negative electrode are arranged at one end of the first pole group close to the second pole group; the second anode and the second cathode are arranged at one end of the second pole group close to the first pole group.

3. The battery cell of claim 2, wherein the casing comprises:

the first opening is arranged right opposite to the second opening.

4. The battery cell of claim 2, wherein the output pole assembly comprises:

the first negative electrode and the second negative electrode are connected through the negative electrode tab;

the first current collector is connected with the positive electrode lug;

and the second current collector is connected with the negative pole lug.

5. The battery cell of claim 4, further comprising a cover plate provided with a positive post and a negative post;

6. The battery cell of claim 4, further comprising:

and the second insulating piece comprises a first wall part and a second wall part, the first wall part covers the first current collector, and the second wall part covers the second current collector.

7. The battery cell of claim 5, wherein the first pole group is formed with a first step portion, the second pole group is formed with a second step portion, the first step portion and the second step portion collectively form a mounting portion, and the cover plate is disposed on the mounting portion;

the shell is formed with an avoiding portion, and the shape of the avoiding portion is matched with that of the cover plate.

8. The battery cell of claim 7, wherein the first current collector comprises first and second angled connection portions, the first connection portion extending in a second direction different from the first direction, the second connection portion being located between the cover plate and the mounting portion, the second connection portion extending toward the positive post;

9. The battery cell of claim 7, wherein the cover plate has a thickness that is less than a depth of the mounting portion such that an outer surface of the cover plate is recessed relative to a surface of the casing.

10. The battery cell of any of claims 1 to 9, wherein the housing is provided with an explosion-proof valve.