CN218731331U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery case; the pole component is arranged on the battery shell; wherein, set up the rib on the surface that battery case was provided with utmost point post subassembly, the length direction of rib is perpendicular to utmost point post subassembly's length direction basically. Through set up the rib on the surface that is provided with utmost point post subassembly at battery case, can be so that the rib realizes strengthening battery case's structure, with this deformation probability that reduces battery case and is provided with utmost point post subassembly surface, guarantee utmost point post subassembly's position relatively fixed, with this when avoiding follow-up battery in groups, because utmost point post subassembly position changes and influence its being connected with the busbar, thereby guarantee utmost point post subassembly and busbar's stability of being connected, and can improve the efficiency that the battery is in groups, with this performance that improves the battery.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

When the battery is in groups, the utmost point post and the busbar of battery are connected, however in carrying out the battery assembling process, because battery housing self structural constraint, battery housing appears the deformation easily to lead to utmost point post position to change, consequently appear easily when subsequently carrying out the connection of utmost point post and busbar and connect the relatively poor problem of stability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery case;

the pole component is arranged on the battery shell;

wherein, set up the rib on the surface that battery case was provided with utmost point post subassembly, the length direction of rib is perpendicular to utmost point post subassembly's length direction basically.

The utility model discloses battery includes battery housing and utmost point post subassembly, and utmost point post subassembly sets up on battery housing. Set up the rib through being provided with utmost point post subassembly at battery case on the surface, and the length direction of rib perpendicular to utmost point post subassembly basically, can be so that the rib realizes strengthening battery case's structure, with this reduce battery case and be provided with the deformation probability on utmost point post subassembly surface, guarantee utmost point post subassembly's position relatively fixed, with this when avoiding follow-up battery in groups, because utmost point post subassembly position changes and influence its being connected with the busbar, thereby guarantee utmost point post subassembly and busbar's stability of being connected, and can improve the battery efficiency in groups, with this performance that improves the battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the first and second substrates are, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural view showing a battery according to a first exemplary embodiment;

fig. 2 is a schematic view showing the structure of a battery according to a second exemplary embodiment.

The reference numerals are explained below:

10. battery with a battery cell a housing; 11. a first surface; 12. a second surface; 13. a reinforcing portion; 14. recessing; 20. a pole assembly; 21. a connecting surface.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 and fig. 2, the battery includes: a battery case 10; the pole assembly 20, the pole assembly 20 is arranged on the battery shell 10; wherein, the surface of the battery case 10 provided with the pole assembly 20 is provided with the reinforcement portion 13, and the length direction of the reinforcement portion 13 is substantially perpendicular to the length direction of the pole assembly 20, so as to avoid the surface deformation of the battery case 10 provided with the pole assembly 20.

The utility model discloses a battery of an embodiment includes battery housing 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up on battery housing 10. Through set up reinforcing part 13 on the surface that battery case 10 was provided with utmost point post subassembly 20, and the length direction of reinforcing part 13 is perpendicular to utmost point post subassembly 20's length direction basically, can make reinforcing part 13 realize the structure enhancement to battery case 10, with this deformation probability that battery case 10 was provided with utmost point post subassembly 20 surface is reduced, guarantee utmost point post subassembly 20's position relatively fixed, with this avoid when follow-up battery is in groups, because utmost point post subassembly 20 position changes and influence its being connected with the busbar, thereby guarantee utmost point post subassembly 20 and the stability of being connected of busbar, and can improve the efficiency that the battery is in groups, with this performance that improves the battery.

It should be noted that, the post assembly 20 is disposed on the battery housing 10, the battery housing 10 is easy to deform when the battery is assembled, for example, after the battery is filled with liquid, the battery housing 10 may bulge and deform, because the post assembly 20 is disposed on the battery housing 10, the post assembly 20 may be stressed to incline, that is, the position of the post assembly 20 may change, and then the subsequent connection with the bus bar is performed, because the position changes, the connection is not only inconvenient, and the false welding is easy to occur when the post assembly 20 is welded with the bus bar, which affects the assembly efficiency and yield of the battery pack. In the embodiment, the reinforcing portion 13 is disposed on the surface of the battery case 10 where the pole assembly 20 is disposed, so that the deformation probability of the battery case 10 can be reduced, thereby preventing the pole assembly 20 from changing in position, and ensuring the welding stability between the pole assembly 20 and the bus bar.

As shown in fig. 1, the longitudinal direction of the reinforcing part 13 may be a, the longitudinal direction of the pole assembly 20 may be B, and the longitudinal direction a of the reinforcing part 13 is perpendicular to the longitudinal direction B of the pole assembly 20 without considering machining errors and assembly errors.

The length direction of the reinforcing portion 13 is substantially perpendicular to the length direction of the pole assembly 20, and the length direction of the reinforcing portion 13 is the extending direction of the longer dimension of the reinforcing portion 13, for example, the reinforcing portion 13 has a substantially rectangular structure, and in this case, the extending direction of the longer dimension side of the rectangular structure is the length direction of the reinforcing portion 13. Accordingly, the length direction of the pole assembly 20 is the extending direction of the longer dimension of the pole assembly 20, and the general shape of the pole assembly 20 may not be limited, where the length direction of the pole assembly 20 is emphasized to illustrate the extending trend of the length dimension of the pole assembly 20, for example, the pole assembly 20 is approximately L-shaped, and the orthogonal projection of the L-shaped pole assembly 20 on the battery case 10 may be a rectangle, and at this time, the length direction of the pole assembly 20 is the extending direction of the long side of the rectangle.

In one embodiment, as shown in fig. 1 and 2, the pole assembly 20 includes a connecting surface 21, and the connecting surface 21 is substantially perpendicular to the surface of the battery housing 10 where the pole assembly 20 is disposed, so that the subsequent connecting surface 21 can be conveniently connected with a bus bar, thereby improving the battery grouping efficiency, and avoiding the bus bar from occupying too much battery grouping space, thereby ensuring the energy density of the battery pack.

The connecting surface 21 is substantially perpendicular to the surface of the battery case 10 where the post assembly 20 is disposed, so that when the surface of the battery case 10 where the post assembly 20 is disposed is deformed, the position of the connecting surface 21 changes, and therefore, the difficulty is high when the subsequent connecting surface 21 is connected to a bus bar, and the problem of poor connection stability is likely to occur.

It should be noted that the surface of the battery case 10 provided with the pole assembly 20 may be perpendicular to the stacking direction when a plurality of batteries are grouped. The connection surface 21 is substantially perpendicular to the surface of the battery case 10 on which the pole assembly 20 is disposed, and it is important here that the connection surface 21 is perpendicular to the surface of the battery case 10 on which the pole assembly 20 is disposed, regardless of manufacturing errors and mounting errors.

In one embodiment, the reinforcing portion 13 is linear, and an included angle between the extending direction of the reinforcing portion 13 and the length direction of the battery case 10 is 0 to 60 °, so that the reinforcing portion 13 can effectively reinforce the battery case 10, and the surface of the battery case 10 provided with the post assembly 20 is prevented from deforming, thereby ensuring the connection stability of the post assembly 20 and the busbar.

The size of the battery shell 10 in the length direction is larger, so that the battery shell 10 is easier to deform along the length direction, the surface of the battery shell 10 provided with the pole assembly 20 is deformed, the extending direction of the reinforcing part 13 and the length direction of the battery shell 10 form an included angle of 0-60 degrees, and therefore the battery shell 10 is reinforced, the structural strength of the battery shell 10 is guaranteed, and the pole assembly 20 is prevented from being deformed too much.

The angle between the extending direction of the reinforcing portion 13 and the longitudinal direction of the battery case 10 may be 0, 1 °,2 °,5 °,10 °, 15 °, 20 °, 21 °, 22 °, 25 °, 30 °, 35 °,40 °, 45 °,50 °, 55 °, 56 °, 58 °, 59 °, or 60 °, and so on.

In one embodiment, the extending direction of the reinforcing part 13 is substantially parallel to the length direction of the battery case 10; wherein, the length of rib 13 is not less than half of the length of battery case 10, and the length of rib 13 is great relatively promptly to this realizes effectively strengthening battery case 10, avoids battery case 10 to take place to warp, thereby effectively guarantees that utmost point post subassembly 20's position is comparatively fixed, makes things convenient for follow-up utmost point post subassembly 20 and busbar to form fixedly.

It should be noted that the extending direction of the reinforcing portion 13 is substantially parallel to the longitudinal direction of the battery case 10, that is, the angle between the extending direction of the reinforcing portion 13 and the longitudinal direction of the battery case 10 is substantially 0 degree, and here, it is important to emphasize that the manufacturing error is not considered, and the extending direction of the reinforcing portion 13 is parallel to the longitudinal direction of the battery case 10 in the case of mounting error.

In one embodiment, the reinforcing part 13 is provided in plurality, and the plurality of reinforcing parts 13 are disposed at intervals in the width direction of the battery case 10, and the plurality of reinforcing parts 13 may further improve the structural strength of the battery case 10.

As shown in fig. 1, the extending direction of the reinforcing part 13 is substantially parallel to the length direction of the battery case 10, and the number of the reinforcing parts 13 may be two, and the two reinforcing parts 13 are spaced apart in the width direction of the battery case 10, so as to achieve effective reinforcement of the battery case 10.

In one embodiment, as shown in fig. 2, the reinforcement 13 may be one, the extending direction of one reinforcing part 13 may form an angle greater than 0 with the length direction of the battery case 10, so that the deformation of the battery case 10 may also be effectively prevented.

The general shape of the reinforcing portion 13 may be rectangular, or the general shape of the reinforcing portion 13 may be trapezoidal, or the general shape of the reinforcing portion 13 may be triangular, or the general shape of the reinforcing portion 13 may be other forms, which is not limited herein.

In one embodiment, the reinforcing portion 13 is integrally formed with the battery case 10, which not only facilitates the forming process, but also improves the structural strength of the battery case 10. The reinforcing part 13 may be a structure that is press-molded on the battery case 10, in which case the reinforcing part 13 may be a groove located inside the battery case 10, or the reinforcing part 13 may be a groove located outside the battery case 10, or the reinforcing part 13 may be a protrusion located inside the battery case 10, or the reinforcing part 13 may be a protrusion located outside the battery case 10. Alternatively, the reinforcing portion 13 may be formed of a rib or the like molded in the battery case 10.

In some embodiments, it is not excluded that the reinforcement portion 13 is formed separately from the battery case 10, and for example, a structure such as a rib may be welded to the battery case 10.

In one embodiment, as shown in fig. 1 and 2, there are two pole assemblies 20, and the two pole assemblies 20 are disposed on the same surface of the battery case 10; wherein, two utmost point post subassemblies 20 set up in the relative both ends of battery case 10 same surface along battery case 10's length direction, and the at least part of reinforcing portion 13 is located between two utmost point post subassemblies 20, and reinforcing portion 13 can guarantee that the regional minimizing between the utmost point post subassembly 20 realizes warping promptly to just can not exert external force to utmost point post subassembly 20, thereby can guarantee utmost point post subassembly 20's position relatively fixed, with this make things convenient for follow-up and busbar to form reliable connection.

Two utmost point post subassemblies 20 set up respectively in the first end and the second end of battery case 10 coplanar, and the region between utmost point post subassembly 20 can be regarded as the region that the connecting wire of two utmost point post subassembly 20 outward flanges formed, and at this moment, the at least part of reinforcing portion 13 is located between two utmost point post subassemblies 20, can effectively guarantee that battery case 10 takes place to warp to guarantee battery case 10's structural stability.

In one embodiment, the length of the reinforcement 13 is no less than two-thirds of the distance between the two pole assemblies 20, so that the opposite ends of the reinforcement 13 are not too far from the pole assemblies 20, this ensures that the reinforcement 13 effectively reinforces the region between the two pole assemblies 20, so that a large deformation of the battery housing 10 is avoided.

In one embodiment, as shown in fig. 1 and 2, the battery housing 10 includes two opposite first surfaces 11 and four second surfaces 12 disposed around the first surfaces 11, the area of the first surfaces 11 is larger than that of the second surfaces 12, and the pole assembly 20 is disposed on the first surfaces 11, so as to ensure that the pole assembly 20 has a reliable supporting surface, thereby ensuring the stability of the pole assembly. And the large surface of the battery is more likely to be expanded and deformed, therefore, the pole assembly 20 is disposed on the first surface 11, and the reinforcing part 13 is correspondingly disposed on the first surface 11, so as to improve the strength of the first surface 11 and avoid the deformation of the first surface 11.

It should be noted that the battery is a prismatic battery, the two opposite first surfaces 11 are large surfaces of the battery case 10, the four second surfaces 12 are small surfaces of the battery case 10, the four second surfaces 12 include two pairs of small surfaces, namely a first pair of small surfaces extending along the length direction of the battery case 10, and a second pair of small surfaces extending along the width direction of the battery case 10, and the area of the first pair of small surfaces is larger than that of the second pair of small surfaces, but smaller than that of the large surfaces. The connection surface 21 of the pole assembly 20 is substantially perpendicular to the first surface 11.

In one embodiment, the pole assembly 20 and the reinforcement part 13 are overlapped in the orthographic projection of the surface of the battery case 10 where the pole assembly 20 is disposed, that is, the reinforcement part 13 can further enhance the structural strength of the battery case 10 and avoid the pole assembly 20 from being deformed greatly due to stress.

The pole assembly 20 and the reinforcing portion 13 may be disposed on the first surface 11, and the reinforcing portion 13 may be an additional structure formed on the first surface 11, for example, a rib is disposed on the first surface 11, or a stamping structure is formed on the first surface 11 as the reinforcing portion 13, and the stamping on the first surface 11 may be inward stamping or outward stamping, which is not limited herein. For example, a projection is formed toward the inside of the battery case 10 and a groove is formed at the outside of the battery case 10, or a groove is formed toward the inside of the battery case 10 and a projection is formed at the outside of the battery case 10.

In one embodiment, the thickness of the battery case 10 is 0.1mm to 0.5mm, so that the weight of the battery case 10 can be reduced, thereby increasing the energy density of the battery. The thickness of the battery case 10 may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, or the like.

The thickness of the battery shell 10 is 0.1mm-0.5mm, and the battery shell 10 is easier to deform, so that the effect of the reinforcing part 13 arranged on the battery shell 10 is more obvious, and the battery shell 10 can be effectively protected.

In one embodiment, the battery further includes a battery cell, and the two pole assemblies 20 may be respectively connected to two pole tabs of the battery cell.

In one embodiment, the length of the cell is a,400mm a 2500mm, the width of the cell is b, the height of the cell is c,2b a 50b, and/or 0.5c b 20c.

Further, b is more than or equal to 50mm and less than or equal to 200mm, and c is more than or equal to 10mm and less than or equal to 100mm.

Preferably, 4 b.ltoreq.a.ltoreq.25 b, and/or 2 c.ltoreq.b.ltoreq.10 c.

In the battery in the above embodiment, the ratio of the length to the width of the battery is large, and further, the ratio of the width to the height of the battery is large, while sufficient energy density is ensured.

In one embodiment, the length of the battery is a, the width of the battery is b, and a is more than or equal to 4b and less than or equal to 7b, i.e. the ratio of the length to the width of the battery in the embodiment is larger, so that the energy density of the battery is increased, and the subsequent formation of the battery pack is facilitated.

In one embodiment, the height of the battery is c, b is more than or equal to 3c and less than or equal to 7c, and the ratio of the width to the height of the battery is larger, so that the battery is convenient to form under the condition of ensuring enough energy density.

Alternatively, the length of the cell may be 500mm to 1500mm, the width of the cell may be 80mm to 150mm, and the height of the cell may be 15mm to 35mm.

The length of the battery is a dimension in the battery length direction, the width of the battery is a dimension in the battery width direction, and the height of the battery is a dimension in the battery height direction, that is, the thickness of the battery.

In one embodiment, the batteries are laminated batteries, which are convenient to pack and can be processed to obtain batteries with longer length.

The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged.

Specifically, the electric core is the lamination formula electric core, and the electric core has first pole piece that range upon range of each other, with first pole piece opposite second pole piece of electric property and the diaphragm piece of setting between first pole piece and second pole piece to make and pile up formation lamination formula electric core to many pairs of first pole piece and second pole piece.

Optionally, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

In one embodiment, as shown in fig. 1 and 2, the battery housing 10 is provided with a recess 14, and the recess 14 can be used for accommodating the pole assembly of another battery, so as to avoid the pole assembly 20 occupying a large installation space.

An embodiment of the utility model also provides a group battery, and the group battery includes above-mentioned battery.

The utility model discloses the battery of group battery of an embodiment includes battery housing 10 and utmost point post subassembly 20, and utmost point post subassembly 20 sets up on battery housing 10. Through set up reinforcing part 13 on the surface that battery case 10 was provided with utmost point post subassembly 20, and the length direction of reinforcing part 13 is perpendicular to utmost point post subassembly 20's length direction basically, can make reinforcing part 13 realize the structure enhancement to battery case 10, with this reduce battery case 10 and be provided with the deformation probability on utmost point post subassembly 20 surface, guarantee utmost point post subassembly 20's position relatively fixed, with this when avoiding follow-up battery to be in groups, because utmost point post subassembly 20 position changes and influence its being connected with the busbar, thereby guarantee utmost point post subassembly 20 and busbar's stability of being connected, and can improve battery unitized efficiency, with this performance that improves the group battery.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A battery, comprising:

a battery case (10);

a pole assembly (20), the pole assembly (20) being disposed on the battery case (10);

the battery shell (10) is provided with a reinforcing part (13) on the surface of the pole assembly (20), and the length direction of the reinforcing part (13) is perpendicular to the length direction of the pole assembly (20).

2. The battery according to claim 1, characterized in that the pole assembly (20) comprises a connection surface (21), the connection surface (21) being perpendicular to the surface of the battery housing (10) on which the pole assembly (20) is provided.

3. The battery according to claim 1, wherein the reinforcing part (13) is linear, and the extending direction of the reinforcing part (13) forms an angle of 0 to 60 ° with the longitudinal direction of the battery case (10).

4. The battery according to claim 3, wherein the direction of extension of the reinforcement (13) is parallel to the length direction of the battery case (10);

wherein the length of the reinforcement portion (13) is not less than half of the length of the battery case (10).

5. The battery according to claim 4, wherein the reinforcing portion (13) is plural, and the plural reinforcing portions (13) are provided at intervals in a width direction of the battery case (10).

6. The battery according to any one of claims 1 to 5, characterized in that the reinforcement (13) is provided integrally with the battery case (10).

7. The battery according to any one of claims 1 to 5, characterized in that the pole assemblies (20) are two, the two pole assemblies (20) being disposed on the same surface of the battery case (10);

the two pole assemblies (20) are arranged at two opposite ends of the same surface of the battery shell (10) along the length direction of the battery shell (10), and at least part of the reinforcing part (13) is positioned between the two pole assemblies (20).

8. The battery according to claim 7, the length of the reinforcement (13) is not less than two thirds of the distance between the two pole assemblies (20).

9. The battery according to any one of claims 1 to 5, characterized in that the battery housing (10) comprises two opposing first surfaces (11) and four second surfaces (12) arranged around the first surfaces (11), the first surfaces (11) having an area larger than the area of the second surfaces (12), the pole assembly (20) being arranged at the first surfaces (11).

10. A battery according to any of claims 1-5, characterized in that the orthographic projection of the pole assembly (20) and the reinforcement (13) on the surface of the battery housing (10) on which the pole assembly (20) is provided coincide.

11. The battery according to any one of claims 1 to 5, the thickness of the battery shell (10) is 0.1mm-0.5mm.

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