CN217881827U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: the battery shell is provided with a liquid injection hole and comprises two opposite first surfaces and four second surfaces arranged around the first surfaces, and the liquid injection hole is arranged on one first surface; and the pole component is arranged on the other first surface. In annotating the liquid in-process, even outside annotate liquid mechanism makes a first surface take place to warp, but another first surface that is provided with utmost point post subassembly can not take place to warp yet, consequently can guarantee utmost point post subassembly's position relatively fixed to this makes things convenient for being connected of follow-up utmost point post subassembly and busbar, thereby improves the performance of 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 assembled, the liquid needs to be injected into the battery through the liquid injection hole, when the liquid is injected, the external liquid injection mechanism needs to support and press the battery shell, and the battery shell deforms due to the fact that the structure of the battery shell is present, so that other structures of the battery are affected.

SUMMERY OF THE UTILITY MODEL

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

According to a first aspect of the present invention, there is provided a battery, comprising:

the battery shell is provided with a liquid injection hole and comprises two opposite first surfaces and four second surfaces arranged around the first surfaces, and the liquid injection hole is arranged on one first surface;

the pole component is arranged on the other first surface.

The utility model discloses battery includes battery housing and utmost point post subassembly, and utmost point post subassembly sets up in battery housing. Through will annotating liquid hole and utmost point post subassembly and set up on two relative first surfaces of battery case, annotate the liquid in-process, even outside notes liquid mechanism makes a first surface take place to warp, but another first surface that is provided with utmost point post subassembly also can not take place to warp, consequently can guarantee utmost point post subassembly's position relatively fixed to this makes things convenient for being connected of follow-up utmost point post subassembly and busbar, thereby improves the performance of 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 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 diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is an exploded schematic view of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;

FIG. 4 is a schematic illustration of a partial structure of a battery according to another exemplary embodiment;

fig. 5 is a schematic plan view of a battery according to an exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a first surface; 12. a second surface; 13. a liquid injection hole; 14. sinking; 15. a first housing member; 16. a second housing member; 20. a pole assembly; 30. a support; 31. a through hole; 32. a baffle; 40. an electric core; 41. a cell main body; 42. the pole ear part.

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 otherwise explicitly specified or limited, 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 the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 5, the battery includes: the battery case 10 is provided with a liquid injection hole 13, the battery case 10 comprises two opposite first surfaces 11 and four second surfaces 12 arranged around the first surfaces 11, and the liquid injection hole 13 is arranged on one first surface 11; the pole assembly 20, the pole assembly 20 is disposed on the other first surface 11.

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 in battery housing 10. Through annotating liquid hole 13 and utmost point post subassembly 20 and setting up on two relative first surfaces 11 of battery case 10, annotate the liquid in-process, even outside notes liquid mechanism makes a first surface 11 take place to warp, but another first surface 11 that is provided with utmost point post subassembly 20 can not take place to warp yet, consequently can guarantee utmost point post subassembly 20's position relatively fixed to this makes things convenient for being connected of follow-up utmost point post subassembly 20 and busbar, thereby improves the performance of battery.

It should be noted that, when the battery injects the electrolyte, the external liquid injection mechanism needs to be pressed against the battery case 10, for example, the external liquid injection mechanism is pressed on one first surface 11, so that the first surface 11 may deform during the liquid injection process, at this time, since the other first surface 11 does not contact with the external liquid injection mechanism, the other first surface 11 does not deform due to the external liquid injection mechanism, so that the position of the pole assembly 20 is relatively fixed, and the position deviation does not occur, and when the battery is subsequently connected with the bus bar, the connection stability between the pole assembly 20 and the bus bar can be ensured.

In one embodiment, the area of the first surface 11 is larger than that of the second surface 12, and the injection hole 13 is disposed on one first surface 11, and the post assembly 20 is disposed on the other first surface 11, so that the first surface 11 can provide a larger area for the injection hole 13, and can provide reliable support for the post assembly 20.

It should be noted that the battery is a prismatic battery, that is, the battery is a prismatic battery, the prismatic battery mainly refers to a prismatic shape, but does not strictly limit whether each side of the prism is necessarily a straight line in a strict sense, a corner between the sides is not necessarily a right angle, and may be a circular arc transition, two opposite first surfaces 11 are large surfaces of the battery case 10, and four second surfaces 12 are small surfaces of the battery case 10, the four second surfaces 12 include two pairs of small surfaces, that is, 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 is smaller than that of the large surfaces.

In one embodiment, the injection hole 13 does not coincide with the orthographic projection of the pole assembly 20 on the same first surface 11, i.e. the electrolyte entering from the injection hole 13 may not directly impact the pole assembly 20, thereby avoiding affecting the pole assembly 20.

The liquid injection hole 13 and the pole assembly 20 are arranged on the two opposite first surfaces 11, and the liquid injection hole 13 and the pole assembly 20 can be arranged in a staggered manner, that is, the orthographic projections of the liquid injection hole 13 and the pole assembly 20 on the same first surface 11 are not overlapped, so that the first surface 11 where the liquid injection hole 13 is located can be prevented from influencing the first surface 11 where the pole assembly 20 is located to the greatest extent, and the safety performance of the battery is ensured. After the liquid injection through the liquid injection hole 13 is completed, the liquid injection hole 13 can be sealed through a sealing structure.

In one embodiment, as shown in fig. 1 and 3, the first surface 11 is provided with a recess 14, and the liquid injection hole 13 is arranged in the recess 14; wherein, annotate liquid hole 13 and set up on sunken 14 diapire to can make things convenient for outside notes liquid mechanism to annotate liquid through annotating liquid hole 13 to battery inside, and can rationally arrange the position that sets up of annotating liquid hole 13, thereby guarantee the structural stability of battery.

The first surface 11 is provided with a recess 14, the recess 14 can be formed by punching, in this case, the wall surface forming the recess 14 has relatively good strength, the liquid injection hole 13 is arranged on the bottom wall of the recess 14, and when the liquid injection nozzle of the external liquid injection structure is in contact with the bottom wall of the recess 14, the liquid injection nozzle is not easily deformed due to the rigidity, so that the probability of deformation of the battery case 10 caused by the external liquid injection structure can be reduced. Be provided with sunken 14 on the first surface 11, sunken 14 can be used for holding the utmost point post subassembly of another battery, and when the battery carried out into groups promptly, the utmost point post subassembly of one battery in two adjacent batteries was accomodate in the sunken 14 of another battery to improve the space utilization of group battery, with this ability density that improves the group battery.

In one embodiment, as shown in FIG. 4, the first surface 11 is provided with a recess 14, and the liquid injection hole 13 is disposed outside the recess 14, in which case the recess 14 can be used to accommodate the pole assembly of another battery. The recess 14 and the pour hole 13 may be located on the same first surface 11.

In one embodiment, as shown in fig. 3, the bottom wall of the recess 14 intersects with the three second surfaces 12, i.e., the recess 14 may extend across the width of the battery case 10, thereby facilitating the formation of the recess 14.

In one embodiment, as shown in fig. 4, the bottom wall of the recess 14 intersects with two adjacent second surfaces 12, i.e., the recess 14 may be located at one corner position of the battery case 10, so that the inside of the battery case 10 may be relatively large, thereby facilitating the arrangement of other structures.

In one embodiment, the number of the recesses 14 may be two, and the two recesses 14 may be located at both ends of the battery case 10, in which case, the number of the liquid inlet holes 13 may be two, and one liquid inlet hole 13 may be located in each of the two recesses 14, and the two liquid inlet holes 13 may be symmetrical about the intersection of the first diagonal direction and the second diagonal direction of the first surface 11, that is, after one liquid inlet hole 13 is rotated 180 degrees about the intersection of the first diagonal direction and the second diagonal direction, the two liquid inlet holes 13 may coincide with each other.

In one embodiment, as shown in fig. 5, the battery further includes a bracket 30, the bracket 30 is disposed in the battery case 10, the bracket 30 is disposed opposite to the liquid injection hole 13, the bracket 30 can reinforce the inside of the battery case 10, and the bracket 30 can be located between the battery case 10 and the battery cell 40, so as to fix the battery cell 40, and the bracket 30 is disposed opposite to the liquid injection hole 13, so that the position of the liquid injection hole 13 can be properly arranged, so that the liquid injection hole 13 is located at the end of the battery case 10. The support 30 may be an insulating support, thereby ensuring reliable insulating performance.

In one embodiment, as shown in fig. 5, the through hole 31 is formed in the bracket 30, and at least a portion of the through hole 31 is disposed opposite to the electrolyte injection hole 13, so that after the electrolyte is injected into the battery case 10 from the electrolyte injection hole 13, the electrolyte can enter the battery cell 40 through the through hole 31, and reliable infiltration of the battery cell 40 is achieved.

In one embodiment, as shown in fig. 5, a diversion plate 32 is disposed on the bracket 30, the diversion plate 32 is located below the liquid injection hole 13, and the diversion plate 32 is inclined downwards towards the side far away from the liquid injection hole 13, so that the electrolyte flowing into the diversion plate 32 from the liquid injection hole 13 can quickly slide down from the diversion plate 32, thereby improving the liquid injection flow efficiency of the electrolyte and avoiding the problem of electrolyte aggregation.

The baffle 32 may be provided so as to be inclined downward toward the side away from the pouring hole 13, and in this case, the baffle 32 may be provided so as to be entirely inclined downward, for example, by being provided so as to be inclined downward as a flat plate, or the baffle 32 may be provided so as to be inclined downward toward the pouring hole 13 as shown in FIG. 5.

In one embodiment, the pour spout 13 may be disposed within the recess 14, and the recess 14 may be disposed opposite the shelf 30.

In one embodiment, the pour hole 13 may be provided outside the depression 14, and the depression 14 may be provided opposite the holder 30.

In one embodiment, as shown in fig. 2, the battery further includes a battery core 40, the battery core 40 is disposed in the battery casing 10, and the pole assembly 20 is connected to the battery core 40. The battery cell 40 includes a battery cell main body 41 and a tab portion 42, the tab portion 42 extends from one side of the battery cell main body 41, and the pole assembly 20 is connected to the tab portion 42.

The battery cell 40 includes a battery cell main body 41 and a tab portion 42, and the tab portion 42 extends from the length direction of the battery cell main body 41; the tab 42 is connected to the terminal assembly 20, and the terminal assembly 20 can be disposed at the end of the battery case 10, so as to facilitate connection and fully utilize the length and space of the battery. Wherein, utmost point ear 42 and utmost point post subassembly 20 can the lug direct connection, and utmost point ear 42 and utmost point post subassembly 20 can the direct weld promptly, or utmost point ear 42 and utmost point post subassembly 20 can be connected through the metal switching piece, and specific connected mode can be the welding, also does not exclude to use modes such as riveting, and this place is not restricted.

It should be noted that the battery cell main body 41 includes more than two pole pieces, the tab portion 42 includes more than two single-piece tabs, the single-piece tabs respectively extend from the corresponding pole pieces, the width of the single-piece tabs is smaller than the width of the pole pieces, a plurality of single-piece tabs are stacked to form the tab portion 42, and are connected to the pole assembly 20, wherein the tab portion 42 can be welded to the pole assembly 20. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, nickel, or the like.

The pole assemblies 20 are two, the two pole assemblies 20 are respectively a positive pole assembly and a negative pole assembly, each pole assembly 20 can comprise two poles and is used for increasing the overcurrent capacity of the battery, the pole lug parts 42 are also two, the two pole lug parts 42 are respectively a positive pole lug and a negative pole lug, the positive pole assembly is connected with the positive pole lug, and the negative pole assembly is connected with the negative pole lug.

It should be noted that the pole assembly 20 and the battery housing 10 may be insulated from each other, for example, the pole assembly and the battery housing may be insulated from each other by an insulating member, or may be insulated by an insulating coating, which is not limited herein and may be selected according to actual requirements. In certain embodiments, it is not excluded that one of the pole assemblies 20 may be electrically connected to the battery housing 10.

In one embodiment, the electrolyte injection hole 13 is disposed on the side of the battery case 10 facing the tab portion 42, so that the electrolyte injection hole 13 can be disposed facing the space where the tab portion 42 is located, thereby facilitating the entry of the electrolyte, and after all, the free space where the tab portion 42 is located can be relatively large.

In one embodiment, as shown in fig. 2, the battery case 10 includes: a first housing piece 15; a second housing part 16, the second housing part 16 being connected to the first housing part 15; the first casing piece 15 is a flat plate, the pole assembly 20 is disposed on the first casing piece 15, and the liquid injection hole 13 is disposed on the second casing piece 16, so that the pole assembly 20 and the liquid injection hole 13 can be located on the two opposite first surfaces 11.

In one embodiment, the battery case 10 may be made of stainless steel or aluminum, and has good corrosion resistance and sufficient strength.

It should be noted that the first housing member 15 and the second housing member 16 may be provided independently, as shown in fig. 2. In some embodiments, it is not excluded that the first housing piece 15 and the second housing piece 16 may be a unitary structure, with the space for accommodating the cell 40 being formed by stamping and subsequently being closed by welding.

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 first and second housing pieces 15, 16 have a thickness of 0.1mm to 0.5mm.

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, or 0.5mm, etc.

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 conveniently formed 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 is 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, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to 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.

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 in battery housing 10. Through will annotating liquid hole 13 and utmost point post subassembly 20 and set up on two relative first surfaces 11 of battery case 10, annotate the liquid in-process, even outside notes liquid mechanism makes a first surface 11 take place to warp, but another first surface 11 that is provided with utmost point post subassembly 20 also can not take place to warp, consequently can guarantee utmost point post subassembly 20's position relatively fixed to this makes things convenient for being connected of follow-up utmost point post subassembly 20 and busbar, thereby improves the performance of 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 (10)

1. A battery, comprising:

the battery case (10), a liquid injection hole (13) is formed in the battery case (10), the battery case (10) comprises two opposite first surfaces (11) and four second surfaces (12) arranged around the first surfaces (11), and the liquid injection hole (13) is formed in one first surface (11);

a pole assembly (20), said pole assembly (20) being arranged on the other of said first surfaces (11).

2. The battery according to claim 1, characterized in that the area of the first surface (11) is larger than the area of the second surface (12).

3. The battery according to claim 1, characterized in that the pour hole (13) does not coincide with the orthographic projection of the pole assembly (20) on the same first surface (11).

4. The battery according to claim 1, wherein the first surface (11) is provided with a recess (14), and the liquid injection hole (13) is provided in the recess (14);

wherein, the liquid injection hole (13) is arranged on the bottom wall of the recess (14).

5. The battery according to claim 4, characterized in that the bottom wall of the recess (14) intersects three of the second surfaces (12).

6. The battery according to claim 4, characterized in that the battery further comprises a bracket (30), the bracket (30) is arranged in the battery shell (10), and the bracket (30) is arranged opposite to the liquid injection hole (13);

wherein, a through hole (31) is arranged on the bracket (30), and at least part of the through hole (31) is arranged opposite to the liquid injection hole (13).

7. The battery according to claim 6, characterized in that a deflector (32) is arranged on the bracket (30), the deflector (32) is positioned below the liquid injection hole (13), and the deflector (32) is arranged to be inclined downwards towards the side far away from the liquid injection hole (13).

8. The battery according to any one of claims 1 to 7, wherein the battery case (10) comprises:

a first housing part (15);

a second housing part (16), the second housing part (16) being connected to the first housing part (15);

the first casing piece (15) is a flat plate, the pole assembly (20) is arranged on the first casing piece (15), and the liquid injection hole (13) is arranged on the second casing piece (16).

9. The battery according to any one of claims 1 to 7, further comprising a cell (40), wherein the cell (40) is disposed in the battery casing (10), wherein the cell (40) comprises a cell main body (41) and a tab portion (42), wherein the tab portion (42) extends from one side of the cell main body (41), and wherein the pole assembly (20) is connected to the tab portion (42);

the liquid injection hole (13) is provided on the side of the battery case (10) facing the tab portion (42).

10. The battery according to any one of claims 1 to 7, wherein the thickness of the battery case (10) is 0.1mm-0.5mm.

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