CN219067126U - Battery cell - Google Patents

Abstract

The utility model discloses a battery cell, comprising: a casing, the casing is structured in a cuboid shape and has a pair of first walls, a pair of second walls and a pair of third walls, the first wall and the second wall The surface area of each of them is smaller than the surface area of the third wall; the explosion-proof valve, the explosion-proof valve is arranged on the first wall; the pole group, the pole group is arranged in the housing, the pole group includes the pole group body and the pole group protrusion, and the pole group protrusion is set On the side of the pole group body facing the first wall, the pole group protrusion separates the pole group body from the first wall to form a first channel, and a second channel is formed between the pole group body and the second wall, The second passage communicates with the first passage, and the first passage corresponds to the explosion-proof valve. In the utility model, the first channel is formed by the protrusion of the pole group, so that the gas generated when the battery cell is abnormal is discharged from the battery cell through the explosion-proof valve, and the safety is improved.

Description

battery cell

technical field

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

Background technique

With the continuous development of technology, users have higher and higher requirements for new energy batteries. In order to improve the safety performance of the battery cell, an explosion-proof valve is usually installed on the battery. When the battery is operating abnormally and gas is generated inside, the gas can be discharged through the explosion-proof valve to avoid major safety accidents.

However, the electrode group in the battery is attached to the shell, and the gas generated cannot reach the explosion-proof valve, causing the explosion-proof valve to fail to explode in time, posing a safety hazard.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model proposes a battery cell to improve safety.

The battery cell according to the embodiment of the present utility model includes: a casing, the casing is configured as a cuboid and has a pair of first walls, a pair of second walls and a pair of third walls, the first walls and the The surface area of each of the second walls is smaller than the surface area of the third wall; an explosion-proof valve, the explosion-proof valve is arranged on the first wall; a pole group, the pole group is arranged in the housing, the The pole group includes a pole group body and a pole group protrusion, the pole group protrusion is arranged on the side of the pole group body facing the first wall, and the pole group protrusion connects the pole group body and the pole group body The first wall is spaced apart to form a first channel, the pole group body and the second wall are formed with a second channel, the second channel communicates with the first channel, and the The first channel corresponds to the explosion-proof valve.

According to the battery cell of the embodiment of the utility model, the first channel is formed by setting the electrode group protrusions, so that the gas generated when the battery cell is abnormal can be discharged from the battery cell through the explosion-proof valve, and the safety is improved.

In some embodiments, there are multiple pole group protrusions arranged at intervals along the length direction of the first wall.

In some embodiments, the explosion-proof valve is located between two adjacent pole group protrusions.

In some embodiments, the width of the pole group protrusion is smaller than the width of the first wall; or a gas channel is opened on the pole group protrusion.

In some embodiments, the pole group protrusions are configured as a protrusion structure with a height in the middle and low ends at both ends, and the explosion-proof valves are respectively located on both sides of the highest point in the middle of the protrusion structure.

In some embodiments, the cross-sectional area of the first channel gradually changes, and one end of the first channel with a larger cross-sectional area communicates with the second channel.

In some embodiments, the height of the pole group is H1, the height of the protrusion of the pole group is h1, and h1 and H1 satisfy the relationship: 1%H1≤h1≤5%H1.

In some embodiments, the pole group further includes: an end plate, the end plate is arranged between the pole group body and the second wall, and the end plate and the second wall form the Describe the second channel.

In some embodiments, one end of the second channel extends to the first channel and communicates with the first channel, and the other end of the second channel extends to another channel opposite to the first channel. at the first wall.

In some embodiments, the end plate includes: an end plate body and a support plate disposed on the end plate body facing the second wall, the support plate has a support plate groove, and the second channel is The support plate is divided into multiple sections, but two adjacent sections are connected by the groove of the support plate, and a second air hole is provided on the end plate body.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a partial structural diagram of a battery cell in an embodiment of the utility model;

Fig. 2 is a structural schematic diagram of the protrusion of the pole group in the first embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the protrusion of the pole group in the second embodiment of the present invention;

Fig. 4 is a partial enlarged view of I in Fig. 1 .

Reference signs:

100. Battery cell;

10. Shell; 11. First wall; 111. First channel; 12. Second wall; 121. Second channel; 13. Third wall; 14. Main body; 15. Cover plate;

20. Explosion-proof valve; 30. Pole group; 31. Pole group body; 33. End plate; 331. End plate body; 3311. Second air hole; 332. Support plate; 3321. Support plate groove; 34. Pole group raised.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features, which are used to describe the features differently, without order or importance.

In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The battery cells of the embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , according to the battery cell 100 of the embodiment of the present invention, the battery cell 100 includes: a casing 10 , an explosion-proof valve 20 and an electrode group 30 .

The housing 10 is configured in a cuboid shape and has a pair of first walls 11, a pair of second walls 12 and a pair of third walls 13, each of which has a smaller surface area than the third wall 13. surface area. The explosion-proof valve 20 is provided on the first wall 11 .

The pole group 30 is arranged in the housing 10, the pole group 30 includes a pole group body 31 and a pole group protrusion 34, the pole group protrusion 34 is arranged on the side of the pole group body 31 facing the first wall 11, the pole group protrusion 34 A first channel 111 is formed by separating the pole group body 31 from the first wall 11, a second channel 121 is formed between the pole group body 31 and the second wall 12, and the second channel 121 communicates with the first channel 111 , and the first channel 111 corresponds to the explosion-proof valve 20 .

Wherein, the pole group protrusion 34 separates the pole group body 31 from the first wall 11, the space between the pole group body 31 and the first wall 11 is the first channel 111, and the first channel 111 corresponds to the explosion-proof valve 20. When the battery cell 100 is abnormal, the gas generated inside the battery cell 100 can easily flow through the first channel 111 and be discharged from the battery cell 100 through the explosion-proof valve 20 to prevent the battery cell 100 from exploding and improve safety.

It should be noted that the pole group body 31 faces the first wall 11 , and the surface area of the first wall 11 is smaller than that of the third wall 13 , which improves the overall strength.

According to the battery cell 100 of the embodiment of the present utility model, the first channel 111 is formed by setting the electrode group protrusion 34, so that the gas generated when the battery cell 100 is abnormal can be discharged from the battery cell 100 through the explosion-proof valve 20, and the safety is improved.

As shown in FIG. 2 , in some embodiments, there are multiple pole group protrusions 34 arranged at intervals along the length direction of the first wall 11 . By arranging a plurality of pole group protrusions 34 to support the casing 10, the overall strength of the battery cell 100 is improved and deformation is avoided.

In some embodiments, the explosion-proof valve 20 is located between two adjacent pole group protrusions 34 . It should be noted that the explosion-proof valve 20 is located between two adjacent pole group protrusions 34 , thereby preventing the pole group protrusions 34 from blocking the explosion-proof valve 20 and improving stability.

In some embodiments, the width of the pole group protrusion 34 is smaller than the width of the first wall 11 . By setting the width of the pole group protrusion 34 to be smaller than the width of the first wall 11 , the gas can flow through both sides of the pole group protrusion 34 and keep the patency of the first channel 111 .

In some embodiments, a gas channel is opened on the pole group protrusion 34 . The first channel 111 is made unobstructed by setting the gas channel.

As shown in FIG. 3 , in some embodiments, the pole group protrusion 34 is configured as a raised structure with a high center and low ends, and the explosion-proof valve 20 is respectively located on both sides of the highest middle part of the raised structure. It can be understood that the raised structure with a high middle and low ends supports the shell 10, and the higher middle part resists the first wall 11 to form the first channel 111, and the two ends are low so that the pole group protrusions 34 will not block the explosion-proof Valve 20 for improved stability.

In some embodiments, the cross-sectional area of the first channel 111 is gradually changed, and one end of the first channel 111 with a larger cross-sectional area communicates with the second channel 121 . It can be understood that one end of the first channel 111 having an enlarged cross-sectional area communicates with the second channel, so that the gas in the second channel 121 can enter the first channel 111 more easily.

As shown in FIG. 2 and FIG. 3 , in some embodiments, the height of the pole group 30 is H1, the height of the pole group protrusion 34 is h1, and h1 and H1 satisfy the relational formula: 1%H1≤h1≤5%H1. It should be noted that if h1<1%H1, the height of the pole group protrusion 34 is small, and the space of the first channel 111 is not enough to discharge gas smoothly; if h1>5%H1, the height of the pole group protrusion 34 is relatively small. Large, the pole group protrusions 34 occupy a larger space, resulting in a smaller volume of the pole group body 31 , which reduces the energy that the battery cell 100 can accommodate. In the present application, by setting h1 within the range of 1% H1 to 5% H1, the energy that can be accommodated by the battery cell 100 is increased on the basis of ensuring smooth gas circulation.

For example, h1 is 1% H1; alternatively, h1 is 2% H1; alternatively, h1 is 3% H1; alternatively, h1 is 4% H1; alternatively, h1 is 5% H1.

As shown in FIG. 1 , in some embodiments, the pole group 30 further includes: an end plate 33 , the end plate 33 is arranged between the pole group body 31 and the second wall 12 , and an end plate 33 is formed between the second wall 12 Second channel 121 . By setting the end plate 33, the modification of the scheme is facilitated.

As shown in Figure 1, in some embodiments, one end of the second channel 121 extends to the first channel 111 and communicates with the first channel 111, and the other end of the second channel 121 extends to the other end opposite to the first channel 111. 11 places on the first wall. By setting one end of the second channel 121 to communicate with the first channel 111 and the other end extending to the other first wall 11 , the effect coverage of the second channel 121 can be increased as much as possible.

As shown in Figures 1 and 4, in some embodiments, the end plate 33 includes: an end plate body 331 and a support plate 332 disposed on the end plate body 331 facing the second wall 12, the support plate 332 has a support plate groove 3321 , the second channel 121 is separated by the support plate 332 to form multiple sections, but two adjacent sections are communicated by the support plate groove 3321 , and the end plate body 331 is provided with a second air hole 3311 . The support plate 332 is located between the second plate body and the second wall 12, so that the second channel 121 is defined by the inner wall surface of the second plate body and the second wall 12. The scheme is simple, wherein the support plate 332 is provided with a support plate groove 3321 increases the fluency of the second channel 121.

Wherein, the second plate body is provided with a second vent hole 3311 , and the second vent hole 3311 facilitates the gas abnormally generated by the battery cell 100 to enter the second channel 121 .

In some embodiments, the surface area of the second wall 12 is less than the surface area of the first wall 11 .

As shown in FIG. 1 , in some embodiments, the housing 10 includes: a main body 14 and a cover plate 15 , the cover plate 15 is disposed on the second wall 12 , and the cover plate 15 is welded on the main body 14 .

Other configurations and operations of the battery cell 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, descriptions with reference to the terms "embodiment", "example" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A battery cell (100), characterized by comprising:

a housing (10), the housing (10) being configured as a rectangular parallelepiped and having a pair of first walls (11), a pair of second walls (12) and a pair of third walls (13), a surface area of each of the first walls (11) and the second walls (12) being smaller than a surface area of the third walls (13);

-an explosion protection valve (20), said explosion protection valve (20) being arranged at said first wall (11);

the pole group (30), pole group (30) set up in casing (10), pole group (30) include pole group body (31) and pole group arch (34), pole group arch (34) set up pole group body (31) orientation first wall (11) side, pole group arch (34) will pole group body (31) with first wall (11) between spaced apart in order to be formed with first passageway (111), pole group body (31) with be formed with second passageway (121) between second wall (12), second passageway (121) with first passageway (111) intercommunication, and first passageway (111) with explosion-proof valve (20) correspond.

2. The battery cell (100) of claim 1, wherein the pole set protrusions (34) are plural and spaced apart along the length of the first wall (11).

3. The battery cell (100) of claim 2, wherein the explosion-proof valve (20) is located between two adjacent pole group projections (34).

4. The battery cell (100) of claim 2, wherein the width of the pole group protrusion (34) is smaller than the width of the first wall (11); or the electrode group protrusion (34) is provided with a gas channel.

5. The battery cell (100) according to claim 1, wherein the pole group protrusion (34) is constructed in a protrusion structure having a high middle and low ends, and the explosion-proof valve (20) is respectively located at both sides of the highest middle of the protrusion structure.

6. The battery cell (100) of claim 1, wherein the cross-sectional area of the first channel (111) is graded and an end of the first channel (111) having a larger cross-sectional area communicates with the second channel (121).

7. The battery cell (100) of claim 1, wherein the height of the pole group (30) is H1, the height of the pole group protrusion (34) is H1, and H1 satisfy the relationship: h1 is more than or equal to 1 percent and h1 is more than or equal to 5 percent H1.

8. The battery cell (100) of claim 1, wherein the pole group (30) further comprises: -an end plate (33), said end plate (33) being arranged between said pole group body (31) and said second wall (12), said end plate (33) and said second wall (12) forming said second channel (121) therebetween.

9. The battery cell (100) of claim 8, wherein one end of the second channel (121) extends to the first channel (111) and communicates with the first channel (111), and the other end of the second channel (121) extends to another first wall (11) opposite to the first channel (111).

10. The battery cell (100) of claim 9, wherein the end plate (33) comprises: the end plate body (331) and set up end plate body (331) orientation second wall (12) backup pad (332), backup pad (332) have backup pad recess (3321), second passageway (121) by backup pad (332) separate form multistage but two adjacent sections by backup pad recess (3321) intercommunication, be provided with second ventilation hole (3311) on end plate body (331).

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