CN218648048U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: the battery comprises a battery shell, wherein a first pole through hole is formed in the battery shell; the pole column penetrates through the first pole column through hole; the sealing element is at least partially positioned in the first pole through hole so as to seal the pole and the battery shell; at least part of the first insulating part is positioned in the battery shell, a second pole column through hole is formed in the first insulating part, and the pole column penetrates through the second pole column through hole; wherein, be provided with first water conservancy diversion passageway on the first insulating part to when the sealing member became invalid, battery case's inside and outside are linked together through first water conservancy diversion passageway, and sealed between utmost point post and the battery case can not formed to first insulating part promptly, thereby when carrying out gas tightness detection, can accurately confirm whether the sealing member can realize reliably sealing between battery case and the utmost point post, guarantee the safety in service performance of follow-up battery with this.

Description

Battery with a battery cell

Technical Field

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

Background

In the related art, after the pole assembly and the battery shell are installed, the airtightness of the battery needs to be detected, the sealing performance of the battery needs to be guaranteed by a sealing element between the battery shell and the pole assembly, but the sealing performance of the battery is possibly mistakenly sealed between the battery shell and the pole assembly due to other structures, so that when the airtightness is detected, whether the sealing element can reliably seal between the battery shell and the pole assembly cannot be determined.

SUMMERY OF THE UTILITY MODEL

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

The utility model provides a battery, include:

the battery comprises a battery shell, wherein a first pole through hole is formed in the battery shell;

the pole column penetrates through the first pole column through hole;

the sealing element is at least partially positioned in the first pole through hole so as to seal the pole and the battery shell;

at least part of the first insulating part is positioned in the battery shell, a second pole through hole is formed in the first insulating part, and the pole penetrates through the second pole through hole;

wherein, be provided with first water conservancy diversion passageway on the first insulating part to when the sealing member became invalid, battery case's inside and outside are linked together through first water conservancy diversion passageway.

The utility model discloses a battery of embodiment includes battery housing, utmost point post, sealing member and first insulating member, utmost point post wears to locate battery housing's first utmost point post through-hole and first insulating member's second utmost point post through-hole, at least part of sealing member is located first utmost point post through-hole, with sealed utmost point post and battery housing, at least part of first insulating member is located battery housing, through be provided with first water conservancy diversion passageway on first insulating member, thereby can be when the sealing member became invalid, battery housing's inside and outside are linked together through first water conservancy diversion passageway, first insulating member can not form to seal between utmost point post and the battery housing promptly, thereby when carrying out the gas tightness and examining, can accurately confirm whether the sealing member can realize the reliable seal between battery housing and the utmost point post, guarantee the safety performance of follow-up battery with this.

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 a schematic diagram illustrating a partial cross-sectional configuration of a battery according to an exemplary embodiment;

fig. 3 is a schematic diagram illustrating a first insulator of a battery according to an exemplary embodiment.

The reference numerals are illustrated below:

10. a battery case; 11. a first pole through hole; 12. a first surface; 13. a second surface; 14. a groove; 20. a pole column; 30. a seal member; 40. a first insulating member; 41. a second pole via; 42. a first flow guide passage; 50. a second insulating member; 51. a third pole through hole.

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 encompass, for example, 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 should 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 or elements "on," "under," or "inner" or "outer," it can be connected not only directly to the other element or elements "on," "under," or "inner" or "outer," but also indirectly to the other element or elements "on," "under," or "inner" or "outer" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 3, the battery includes: the battery comprises a battery shell 10, wherein a first pole through hole 11 is formed in the battery shell 10; the pole 20 is arranged in the first pole through hole 11 in a penetrating manner; a sealing member 30, at least part of the sealing member 30 being located in the first pole through hole 11 to seal the pole 20 and the battery case 10; the first insulating part 40, at least part of the first insulating part 40 is located in the battery shell 10, the first insulating part 40 is provided with a second pole through hole 41, and the pole 20 is arranged in the second pole through hole 41 in a penetrating manner; wherein, the first insulating member 40 is provided with a first flow guide passage 42 so that the inside and the outside of the battery case 10 communicate with each other through the first flow guide passage 42 when the sealing member 30 fails.

The utility model discloses a battery of an embodiment includes battery housing 10, utmost point post 20, sealing member 30 and first insulating member 40, utmost point post 20 wears to locate battery housing 10's first utmost point post through-hole 11 and first insulating member 40's second utmost point post through-hole 41, sealing member 30 at least part is located first utmost point post through-hole 11, with sealed utmost point post 20 and battery housing 10, at least part of first insulating member 40 is located battery housing 10, through be provided with first water conservancy diversion passageway 42 on first insulating member 40, thereby can be when sealing member 30 became invalid, battery housing 10's inside and outside are linked together through first water conservancy diversion passageway 42, first insulating member 40 can not form and seal between utmost point post 20 and battery housing 10 promptly, thereby when carrying out the gas tightness detection, can accurately confirm whether sealing member 30 can realize the reliable sealed between battery housing 10 and the utmost point post 20, guarantee the safety performance of follow-up battery with this.

It should be noted that, in the normal use state of the battery, the sealing member 30 is used to seal the pole post 20 and the battery case 10, if the sealing member 30 cannot seal, other structures temporarily seal the pole post 20 and the battery case 10, but after a long time of use, the sealing failure between the pole post 20 and the battery case 10 is likely to occur, thereby causing a battery safety problem. In this embodiment, by providing the first diversion channel 42 on the first insulating member 40, the gas inside the battery case 10 can flow to the position of the sealing member 30 through the first diversion channel 42, for example, when the sealing member 30 cannot seal the first post through hole 11, the gas will flow out of the outside of the battery case 10 through the first post through hole 11, therefore, when the air tightness of the battery is detected, whether the sealing member 30 can reliably seal between the battery case 10 and the post 20 can be accurately determined, so as to ensure the safety performance of the subsequent battery.

The failure of the sealing member 30 can be regarded as the structural damage of the sealing member 30, so that the effective sealing between the pole 20 and the battery shell 10 cannot be realized, or the failure of the sealing member 30 can be regarded as the structural damage of the sealing member 30, but due to the problems of installation and the like, the effective sealing between the pole 20 and the battery shell 10 cannot be realized, so that the sealing member failure in the embodiment refers to the failure of the sealing member 30, namely the failure of the sealing member 30 to form the effective sealing between the pole 20 and the battery shell 10, and other failures can be circulated in the first pole through hole 11, so that the outer side and the inner side of the battery shell 10 are communicated.

In one embodiment, the battery further includes a cell, and the first insulating member 40 is located between the battery case 10 and the cell, thereby achieving insulation between the cell and the battery case 10. The battery cell is disposed in the battery case 10, and the battery cell is electrically connected to the pole 20.

The battery includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The cell refers to a unit formed by winding or laminating a stacking part, wherein the stacking part 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.

The battery is the lamination formula battery, and it is convenient not only to make up a group, and can process and obtain the longer battery of length. 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 winding battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm piece disposed between the first pole piece and the second pole piece are wound to obtain a winding battery cell.

The battery can be a square battery, namely the battery can be a quadrangular battery, the quadrangular battery mainly refers to a prismatic battery, the shape of the quadrangular battery is in a prismatic shape, whether each edge of the prism is a straight line in a strict meaning or not is not strictly limited, and corners between the edges are not necessarily right angles and can be in arc transition. In certain embodiments, it is not excluded that the battery may be a cylindrical battery.

In one embodiment, the first flow guide channel 42 may be spaced apart from the second pole through hole 41, that is, the first flow guide channel 42 may not communicate with the second pole through hole 41, but the first flow guide channel 42 may penetrate the first insulating member 40, thereby allowing gas to flow from the first flow guide channel 42 to the sealing member 30, and thus, when the sealing member 30 fails, the inside and the outside of the battery case 10 communicate with each other through the first flow guide channel 42.

In one embodiment, the first flow guiding channel 42 is communicated with the second pole through hole 41, so that the gas inside the battery shell 10 can flow from the first flow guiding channel 42 to the second pole through hole 41 and flow to the sealing element 30, and whether the sealing element 30 realizes effective sealing on the first pole through hole 11 can be effectively determined through gas tightness detection, and the safety use performance of the battery can be further ensured.

The first diversion channel 42 is provided to avoid the mis-sealing of the first insulating member 40 between the battery case 10 and the pole 20, so that the sealing performance of the sealing member 30 cannot be known, and the mis-sealing of the first insulating member 40 between the battery case 10 and the pole 20 can be effectively avoided by communicating the first diversion channel 42 with the second pole through hole 41.

In one embodiment, as shown in fig. 3, the first flow guide channel 42 is formed on the wall of the second pole through hole 41, similarly to forming a recess on the wall of the second pole through hole 41, so that the recess serves as the first flow guide channel 42, thereby ensuring that gas can flow from the inside of the battery case 10 to the sealing member 30 through the first flow guide channel 42, whereby it can be accurately determined whether the sealing member 30 can achieve an effective seal between the pole 20 and the battery case 10.

In one embodiment, the bottom wall of the first flow guide channel 42 is at least partially inclined to the center line of the second pole through hole 41, which not only can avoid damaging the structure of the first insulating member 40 excessively, but also can ensure that the first flow guide channel 42 can realize the circulation of gas.

In one embodiment, an expansion gap is formed between the first flow guide channel 42 and the pole 20, and the expansion gap gradually expands from one end of the second pole through hole 41 close to the first pole through hole 11 to the direction away from the other end of the first pole through hole 11, so that the gas in the battery shell 10 can rapidly flow into the first flow guide channel 42, and the flow rate is gradually reduced, thereby also preventing a large amount of gas from gathering at the sealing member 30 to affect the structural performance of the sealing member 30.

The bottom wall of the first flow guide channel 42 is inclined to the center line of the second pole through hole 41, an expansion gap is formed between the first flow guide channel 42 and the pole 20, the expansion gap is gradually expanded from one end, close to the first pole through hole 11, of the second pole through hole 41 to the direction away from the other end of the first pole through hole 11, namely, a chute is cut on the hole wall of the second pole through hole 41 in a similar manner, the chute is gradually inclined from one side, close to the battery shell 10, of the first insulating member 40 to one side, close to the battery core, so that gas can flow into the first flow guide channel 42.

In one embodiment, the number of the first flow guide channels 42 is at least two, so that gas can flow to the sealing member 30 through at least two first flow guide channels 42, even if one of the first flow guide channels 42 is blocked by mistake, normal flow of the gas flow is not affected, and therefore whether the sealing member 30 forms reliable sealing with the battery shell 10 and the pole 20 can be accurately determined.

In one embodiment, the first flow guiding channels 42 are uniformly distributed on the hole wall of the second pole through hole 41, which not only has a simple distribution manner, but also enables the first insulating member 40 to have a relatively symmetrical structure, thereby avoiding the problem that the local structure of the first insulating member 40 is weakened.

It should be noted that, in some embodiments, it is not excluded that the first flow guiding passages 42 may be disposed non-uniformly on the hole walls of the second pole through holes 41.

In one embodiment, as shown in fig. 1 and 2, the battery further includes a second insulating member 50, at least a portion of the second insulating member 50 is located outside the battery case 10 and between the terminal post 20 and the battery case 10, so that the second insulating member 50 can further achieve an insulating arrangement between the terminal post 20 and the battery case 10.

The sealing member 30 not only can achieve effective sealing of the pole post 20 and the battery case 10, but also can achieve insulation between the pole post 20 and the battery case 10, and further, the second insulating member 50 can further achieve insulation arrangement of the pole post 20 and the battery case 10.

The sealing member 30 may be a sealing ring, and the first insulating member 40 may be a plastic member, or the first insulating member 40 may be a rubber member, and the second insulating member 50 may be a plastic member, or the second insulating member 50 may be a rubber member.

In one embodiment, as shown in fig. 2, the second insulating member 50 is provided with a third pole through hole 51, and the pole 20 passes through the third pole through hole 51; the second insulating member 50 is provided with a second flow guiding channel, so that when the sealing member 30 fails, the inside and the outside of the battery case 10 are communicated through the first flow guiding channel 42 and the second flow guiding channel, thereby preventing the second insulating member 50 from forming a false seal for the pole 20 and the battery case 10, and therefore, when the battery hermetic seal is detected, whether the sealing member 30 realizes an effective seal between the pole 20 and the battery case 10 can be accurately determined.

Through being provided with first water conservancy diversion passageway 42 on first insulating part 40, the inside gas of battery casing 10 can flow to the position department of sealing member 30 through first water conservancy diversion passageway 42, be provided with the second water conservancy diversion passageway on the second insulating part 50, for example, when sealing member 30 can't realize forming sealed to first utmost point post through-hole 11, gas will flow to first utmost point post through-hole 11 by first water conservancy diversion passageway 42, and flow to the second water conservancy diversion passageway by first utmost point post through-hole 11, gaseous outside that can flow battery casing 10, consequently, when carrying out the gas tightness to the battery and examining, can accurately confirm whether sealing member 30 can realize the reliable sealed between battery casing 10 and utmost point post 20 to guarantee the safe handling performance of follow-up battery with this.

In one embodiment, as shown in fig. 2, a groove 14 is formed on the battery case 10, the groove 14 is communicated with the first pole through hole 11, and a part of the second insulating member 50 is located in the groove 14, so that the second insulating member 50 can be stably arranged on the battery case 10, thereby ensuring the installation stability of the second insulating member 50.

It should be noted that the sealing member 30 can be abutted against the second insulating member 50, and the sealing member 30 can be abutted against the first insulating member 40, but neither the first insulating member 40 nor the second insulating member 50 can form a false seal against the battery case 10 and the pole post 20.

In one embodiment, as shown in fig. 1, the battery housing 10 includes two opposite first surfaces 12 and four second surfaces 13 disposed around the first surfaces 12, an area of the first surface 12 is larger than an area of the second surfaces 13, the first pole through hole 11 is disposed on the first surface 12, and the pole 20 is disposed on the first surface 12, so that the first surface 12 can effectively support the pole 20, thereby ensuring the mounting stability of the pole 20.

It should be noted that the two opposite first surfaces 12 are large surfaces of the battery case 10, the four second surfaces 13 are small surfaces of the battery case 10, the four second surfaces 13 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 areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas of the large surfaces.

In some embodiments, there are two terminals 20, the two terminals 20 are a positive terminal structure and a negative terminal structure, respectively, each terminal 20 may include two terminals for increasing the overcurrent capacity of the battery, there are two terminals of the battery core, the two terminals are a positive terminal and a negative terminal, respectively, the positive terminal structure is connected to the positive terminal, and the negative terminal structure is connected to the negative terminal.

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, or 0.5mm, etc.

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

In one embodiment, the length of the battery is e,400mm < e < 2800mm, the width of the battery is f, the height of the battery is g,2f < e < 80f, and/or 0.5g < f < 20g.

Further, f is more than or equal to 80mm and less than or equal to 200mm, and g is more than or equal to 10mm and less than or equal to 100mm.

Preferably, 4f is less than or equal to e is less than or equal to 25f, and/or 2g is less than or equal to f is less than or equal to 10g.

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 e, the width of the battery is f, e is more than or equal to 4f and less than or equal to 7f, namely, the ratio of the length to the width of the battery is larger in the embodiment, so that the energy density of the battery is increased, and the battery pack is convenient to form subsequently.

In one embodiment, the height of the battery is g, f is more than or equal to 3g and less than or equal to 7g, 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 800mm to 1800mm, the width of the cell may be 80mm to 180mm, 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.

An embodiment of the utility model also provides a group battery, and the group battery includes foretell battery.

The utility model discloses a group battery of embodiment includes the battery, the battery includes battery housing 10, utmost point post 20, sealing member 30 and first insulating member 40, utmost point post 20 wears to locate battery housing 10's first utmost point post through-hole 11 and first insulating member 40's second utmost point post through-hole 41, sealing member 30 at least part is located first utmost point post through-hole 11, with sealed utmost point post 20 and battery housing 10, at least part of first insulating member 40 is located battery housing 10, through be provided with first water conservancy diversion passageway 42 on first insulating member 40, thereby can be when sealing member 30 became invalid, battery housing 10's inside and outside are linked together through first water conservancy diversion passageway 42, promptly first insulating member 40 can not form and seal between utmost point post 20 and battery housing 10, thereby when carrying out the gas tightness detection, can accurately confirm whether sealing member 30 can realize the reliable sealed between battery housing 10 and the utmost point post 20, guarantee the safety performance of follow-up group battery with this.

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.

In one embodiment, the battery pack comprises at least two batteries, and the battery pack further comprises a bus bar which connects the at least two batteries, so that the batteries are connected in series or in parallel.

The pole 20 is disposed at an end of the battery housing 10, and a bus bar may connect two adjacent batteries, and the bus bar is located at an end side of the battery housing 10, so as to electrically connect the bus bar and the pole 20.

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 disclosure is limited only by the appended claims.

Claims (10)

1. A battery, comprising:

the battery comprises a battery shell (10), wherein a first pole through hole (11) is formed in the battery shell (10);

the pole (20) penetrates through the first pole through hole (11);

a seal (30), at least part of said seal (30) being located within said first pole through hole (11) to seal said pole (20) and said battery housing (10);

the battery comprises a battery shell (10), a first insulating piece (40), a second pole through hole (41) is formed in the first insulating piece (40), and the pole (20) penetrates through the second pole through hole (41);

wherein the first insulating member (40) is provided with a first flow guide passage (42) so that the inside and the outside of the battery case (10) communicate through the first flow guide passage (42) when the sealing member (30) fails.

2. The battery according to claim 1, wherein the first flow guide channel (42) communicates with the second pole through hole (41).

3. The battery according to claim 2, wherein the first flow guide channel (42) is formed on a hole wall of the second pole through hole (41).

4. The battery according to claim 3, characterized in that the bottom wall of the first flow-guiding channel (42) is arranged at least partially inclined to the centre line of the second pole through hole (41).

5. The battery according to claim 4, characterized in that an expansion gap is formed between the first flow guide channel (42) and the pole (20), and the expansion gap gradually expands from one end of the second pole through hole (41) close to the first pole through hole (11) to the direction away from the other end of the first pole through hole (11).

6. The battery according to any one of claims 3 to 5, wherein the first flow guide channels (42) are at least two;

the first flow guide channels (42) are uniformly distributed on the hole wall of the second pole through hole (41).

7. The battery according to claim 1, further comprising a second insulator (50), at least part of the second insulator (50) being located outside the battery housing (10) and between the pole (20) and the battery housing (10).

8. The battery according to claim 7, characterized in that the second insulating member (50) is provided with a third pole through hole (51), and the pole (20) passes through the third pole through hole (51);

wherein a second flow guide passage is provided on the second insulating member (50) so that the inside and the outside of the battery case (10) communicate with each other through the first flow guide passage (42) and the second flow guide passage when the sealing member (30) fails.

9. The battery according to claim 7, wherein a groove (14) is formed on the battery case (10), the groove (14) communicates with the first pole through hole (11), and a part of the second insulating member (50) is located in the groove (14).

10. The battery according to claim 1, wherein the battery case (10) includes two opposing first surfaces (12) and four second surfaces (13) disposed around the first surfaces (12), the first surfaces (12) having an area larger than an area of the second surfaces (13), the first pole through-hole (11) being disposed on the first surfaces (12).

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