Battery cell side plate, single battery, battery pack and vehicle

Abstract

The utility model discloses a battery cell side plate, a single battery, a battery pack and a vehicle, the battery cell side plate is suitable for being arranged between a battery cell and a shell, a first explosion-proof hole is formed in the battery cell side plate, and the first explosion-proof hole is used for being arranged opposite to an explosion-proof valve of the shell; wherein the battery cell side plate is provided with an exhaust hole, the exhaust hole is adjacent to the first explosion-proof hole, and the exhaust hole is used for exhausting and draining in the direction close to the first explosion-proof hole. According to the battery cell side plate disclosed by the embodiment of the utility model, the pressure around the anti-explosion valve can be improved, and gas in the single battery can be quickly discharged during thermal runaway, so that the safety of the single battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a battery core side plate, a single battery, a battery pack and a vehicle. Background Art

[0002] The battery cell side plate in the related art is usually arranged between the battery cell and the shell to support the battery cell from the side of the battery cell to prevent the battery cell from being deformed and damaged. In addition, in order to allow the gas in the single battery cell to be discharged from the explosion-proof valve on the side of the shell when the single battery cell has thermal runaway, a first explosion-proof hole is usually provided on the battery cell side plate. The first explosion-proof hole is opposite to the explosion-proof valve on the side of the single battery cell. However, when the single battery cell has thermal runaway, the gas cannot be effectively discharged, and the safety of the single battery cell is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell side plate, which can increase the pressure around the explosion-proof valve, so that the gas in the single battery can be quickly discharged when thermal runaway occurs, which is conducive to improving the safety of the single battery.

[0004] The utility model also provides a single cell battery having the battery core side plate.

[0005] The utility model also provides a battery pack having the above-mentioned single battery.

[0006] The utility model also provides a vehicle with the battery pack.

[0007] In order to achieve the above-mentioned purpose, according to the first aspect embodiment of the utility model, a battery cell side plate is proposed, the battery cell side plate is suitable for being arranged between the battery cell and the shell, a first explosion-proof hole is formed on the battery cell side plate, and the first explosion-proof hole is used to be arranged opposite to the explosion-proof valve of the shell; wherein, the battery cell side plate is provided with an exhaust hole, and the exhaust hole is adjacent to the first explosion-proof hole, and the exhaust hole is used to exhaust and drain in the direction close to the first explosion-proof hole.

[0008] The battery cell side plate according to the embodiment of the utility model can increase the pressure around the explosion-proof valve, and quickly discharge the gas in the single battery during thermal runaway, which is beneficial to improving the safety of the single battery.

[0009] According to some embodiments of the present invention, there are a plurality of exhaust holes, and the plurality of exhaust holes are distributed in rows and / or columns to form an exhaust hole group around the first explosion-proof hole.

[0010] According to some embodiments of the present invention, there are at least two exhaust hole groups distributed on at least two sides of the first explosion-proof hole.

[0011] According to some embodiments of the present invention, the at least two exhaust hole groups are symmetrically arranged about the center of the first explosion-proof hole.

[0012] According to some embodiments of the present invention, there are multiple exhaust holes, and the multiple exhaust holes are arranged along the circumference of the first explosion-proof hole to form an exhaust hole group.

[0013] According to some embodiments of the present invention, the exhaust holes close to the center of the first explosion-proof hole and the exhaust holes far from the center of the first explosion-proof hole are staggered in the circumferential direction of the first explosion-proof hole.

[0014] According to some embodiments of the present utility model, the battery cell side plate is provided with heat dissipation holes, and the heat dissipation holes and the exhaust holes are spaced apart on the battery cell side plate.

[0015] According to some embodiments of the present invention, there are a plurality of heat dissipation holes, and the plurality of heat dissipation holes are spaced apart in the length direction and / or width direction of the battery cell side plate.

[0016] According to some embodiments of the utility model, in the exhaust hole group, there are multiple exhaust holes, and the minimum spacing between two adjacent exhaust holes on one side of the first explosion-proof hole is d1, and the minimum spacing between adjacent heat dissipation holes is d2, and d1 and d2 satisfy: d1<d2.

[0017] According to some embodiments of the present invention, the cross-sectional area of ​​the exhaust hole is S1, the cross-sectional area of ​​the heat dissipation hole is S2, and S1 and S2 satisfy: 0.3≤S1 / S2≤1.

[0018] According to some embodiments of the present invention, the cross-sectional area of ​​the exhaust hole is S1, the cross-sectional area of ​​the first explosion-proof hole is S3, and S1 and S3 satisfy: S1≤S3.

[0019] According to some embodiments of the present invention, the cross-sectional area of ​​the first explosion-proof hole is S3, the area of ​​one side of the battery cell side plate in the thickness direction is S4, and S3 and S4 satisfy: 0.02≤S3 / S4≤0.5.

[0020] According to some embodiments of the present invention, the exhaust hole has a shape of at least one of a circle, a line, and a polygon.

[0021] According to some embodiments of the utility model, the exhaust hole is constructed as an elongated hole extending along the width direction or the length direction of the battery cell side plate; or, the exhaust hole is constructed as an elongated hole having an angle α with the width direction or the length direction of the battery cell side plate, and the angle α satisfies: 0°<α<90°.

[0022] According to some embodiments of the utility model, the exhaust hole includes: a first sub-segment and a second sub-segment, which are close to the first explosion-proof hole along a direction perpendicular to the axial direction of the first explosion-proof hole, the first sub-segment gradually approaches the first explosion-proof hole, the second sub-segment gradually approaches the first explosion-proof hole, one end of the first sub-segment close to the first explosion-proof hole and one end of the second sub-segment close to the first explosion-proof hole are connected, and the first sub-segment and the second sub-segment are symmetrically arranged with respect to the direction perpendicular to the axial direction of the first explosion-proof hole.

[0023] According to some embodiments of the present invention, there are at least two first explosion-proof holes, which are spaced apart in the length direction and / or width direction of the battery cell side plate.

[0024] According to some embodiments of the present invention, the thickness of the battery cell side plate is D, and D satisfies: 0.5mm<D<12mm.

[0025] According to some embodiments of the present invention, along a direction perpendicular to the axial direction of the first explosion-proof hole, the number of the exhaust holes gradually decreases in a direction away from the center of the first explosion-proof hole.

[0026] According to some embodiments of the utility model, the battery cell side plate has a plurality of exhaust areas, and the plurality of exhaust areas are arranged in a direction away from the first explosion-proof hole; wherein, along the direction away from the first explosion-proof hole, the number of the exhaust holes in the plurality of exhaust areas gradually decreases.

[0027] According to the second aspect of the utility model, a single cell battery is proposed, comprising: a shell, the shell is provided with a second explosion-proof hole; a battery cell, the battery cell is arranged in the shell; an explosion-proof valve, the explosion-proof valve is arranged in the second explosion-proof hole; according to the battery cell side plate of the first aspect of the utility model, the battery cell side plate is suitable for being arranged between the battery cell and the shell.

[0028] According to the single cell battery of the second aspect embodiment of the utility model, by utilizing the battery cell side plate of the first aspect embodiment of the utility model, the pressure around the explosion-proof valve on the side of the single cell battery can be increased, and the gas in the single cell battery can be quickly discharged in the event of thermal runaway, thereby improving the safety of the single cell battery.

[0029] According to some embodiments of the present invention, the surface area of ​​one side of the battery cell side plate in the thickness direction is S4, and the surface area of ​​one side of the battery cell in the width direction is S5; wherein S4 and S5 satisfy: 0.5≤S4 / S5≤1.

[0030] According to some embodiments of the present invention, the central axis of the first explosion-proof hole coincides with the central axis of the second explosion-proof hole, the cross-sectional area of ​​the first explosion-proof hole is S3, and the cross-sectional area of ​​the second explosion-proof hole is S6; wherein S3 and S6 satisfy: 0.2≤S3 / S6≤1.2.

[0031] According to a third aspect of the present invention, a battery pack is provided, comprising a single cell according to the second aspect of the present invention.

[0032] According to the battery pack of the third aspect embodiment of the utility model, by utilizing the single cell according to the second aspect embodiment of the utility model, the gas in the single cell can be quickly discharged in the event of thermal runaway, the safety of the single cell is higher, and the safety of the battery pack is higher.

[0033] According to a fourth aspect of the present utility model, a vehicle is provided, comprising the battery pack according to the third aspect of the present utility model.

[0034] The vehicle according to the fourth aspect of the present invention utilizes the battery pack according to the third aspect of the present invention, so that the gas in the single battery can be quickly discharged in the event of thermal runaway, thereby improving safety.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 is an exploded view of a single cell according to the first embodiment of the utility model;

[0038] Figure 2 It is a structural schematic diagram of a battery cell side plate according to the first embodiment of the utility model;

[0039] Figure 3 is an exploded view of a single cell according to a second embodiment of the utility model;

[0040] Figure 4 It is a structural schematic diagram of a battery cell side plate according to a second embodiment of the utility model;

[0041] Figure 5 is an exploded view of a single cell according to a third embodiment of the utility model;

[0042] Figure 6It is a structural schematic diagram of a battery cell side plate according to a third embodiment of the utility model;

[0043] Figure 7 is an exploded view of a single cell according to a fourth embodiment of the utility model;

[0044] Figure 8 is a schematic structural diagram of a battery cell side plate according to a fourth embodiment of the utility model;

[0045] Fig. 9 is an exploded view of a single cell according to a fifth embodiment of the utility model;

[0046] Fig.10 It is a structural schematic diagram of a battery cell side plate according to a sixth embodiment of the utility model.

[0047] Reference numerals:

[0048] 1. Battery cell side panel; 2. Single battery;

[0049] 100. The first explosion-proof hole;

[0050] 200, exhaust hole; 210, exhaust hole group; 211, first exhaust hole row; 212, second exhaust hole row; 220, first subsection; 230, second subsection;

[0051] 300, heat dissipation holes;

[0052] 400, housing; 410, second explosion-proof hole;

[0053] 500. Battery cells. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0057] In the description of the present invention, "multiple" means two or more, and "several" means one or more.

[0058] The following describes a cell side plate 1 according to an embodiment of the present utility model with reference to the accompanying drawings.

[0059] like Figure 1-Figure 10 As shown, according to an embodiment of the utility model, the battery cell side plate 1 is suitable for being arranged between the battery cell 500 and the shell 400, and a first explosion-proof hole 100 is formed on the battery cell side plate 1, and the first explosion-proof hole 100 is used to be arranged opposite to the explosion-proof valve of the shell 400; wherein, the battery cell side plate 1 is provided with an exhaust hole 200, and the exhaust hole 200 is adjacent to the first explosion-proof hole 100, and the exhaust hole 200 is used to exhaust and drain in the direction close to the first explosion-proof hole 100. wherein, the battery cell side plate 1 may include a support plate, an insulating plate and a heat dissipation plate.

[0060] According to the battery cell side plate 1 of the embodiment of the utility model, the battery cell side plate 1 is arranged between the battery cell 500 and the shell 400. Specifically, the battery cell side plate 1 can be supported on the opposite sides of the width direction of the battery cell 500 or the opposite sides of the thickness direction of the battery cell 500. In this way, the battery cell side plate 1 can be used to support the battery cell 500, thereby improving the structural strength of the battery cell 500 and making the battery cell 500 less likely to deform. For example, when the battery cell 500 is longer or the battery cell 500 is narrower, when the battery cell 500 is assembled into the shell 400, the battery cell side plate 1 can increase the supporting force of the battery cell 500, thereby preventing the battery cell 500 from bending and deformation.

[0061] In addition, a first explosion-proof hole 100 is formed on the battery cell side plate 1, and the first explosion-proof hole 100 is used to be arranged opposite to the explosion-proof valve of the shell 400. In this way, when the single battery 2 has thermal runaway, the gas generated by the battery cell 500 can flow to the explosion-proof valve on the shell 400 through the first explosion-proof hole 100. When the explosion-proof valve is opened, the gas in the single battery 2 can be discharged through the explosion-proof valve, thereby avoiding the explosion of the single battery 2, and having higher safety.

[0062] In addition, the cell side plate 1 is provided with an exhaust hole 200, and the exhaust hole 200 is adjacent to the first explosion-proof hole 100, and the exhaust hole 200 is used to exhaust and drain in the direction close to the first explosion-proof hole 100, wherein the exhaust hole 200 can penetrate the cell side plate 1 along the thickness direction of the cell side plate 1. The exhaust hole 200 and the first explosion-proof hole 100 can form an explosion-proof area on the cell side plate 1, and the explosion-proof area corresponds not only to the explosion-proof valve, but also to the surrounding area of ​​the explosion-proof valve.

[0063] As a result, the gas generated by the battery cell 500 can flow to the exhaust hole 200, and when the single battery 2 has thermal runaway, a large amount of gas generated by the battery cell 500 can flow to the shell 400 through the exhaust hole 200, thereby squeezing the shell 400. In addition, the amount of gas near the first explosion-proof hole 100 increases due to the provision of the exhaust hole 200, which causes the pressure on the part of the shell 400 near the explosion-proof valve to increase accordingly during thermal runaway. The part of the shell 400 near the explosion-proof valve will deform first due to the greater pressure, that is, the shell 400 will deform at the The portion close to the explosion-proof valve will swell first, and a gap will be generated between the shell 400 and the battery side plate 1, so that the exhaust hole 200 and the explosion-proof valve are connected. In other words, all holes in the explosion-proof area can be connected to the explosion-proof valve, and a large amount of gas can flow to the explosion-proof valve through the exhaust hole 200 and the first explosion-proof hole 100, so that the single battery 2 can open the explosion-proof valve to spray out the gas when thermal runaway occurs, which more effectively avoids the situation where the explosion-proof valve of the single battery 2 does not open when thermal runaway occurs, thereby avoiding the explosion of the single battery 2, and having higher safety.

[0064] In this way, the battery cell side plate 1 according to the embodiment of the utility model can increase the pressure around the explosion-proof valve, and quickly discharge the gas in the single battery 2 when thermal runaway occurs, which is beneficial to improving the safety of the single battery 2.

[0065] In some specific embodiments of the present invention, Figure 1-Figure 10 As shown, there are a plurality of exhaust holes 200 , and the plurality of exhaust holes 200 are distributed in rows and / or columns to form an exhaust hole group 210 around the first explosion-proof hole 100 .

[0066] That is, the plurality of exhaust holes 200 are arranged in at least one group in the explosion-proof area, and the exhaust holes 200 in each group are distributed in rows and / or columns. The number of exhaust holes 200 around the first explosion-proof hole 100 can be set to be relatively large, thereby increasing the maximum flow rate of the exhaust holes 200, so that when the single cell 2 has thermal runaway, the portion of the housing 400 around the explosion-proof valve is subjected to a greater air pressure, and the gas in the single cell 2 can flow to the explosion-proof valve through the plurality of exhaust holes 200, so that the gas in the single cell 2 is discharged faster, and the explosion of the single cell 2 is more effectively avoided.

[0067] Furthermore, by arranging the multiple exhaust holes 200 in rows or columns to form an exhaust hole group 210, the distribution of the multiple exhaust holes 200 can be more regular, which is beneficial to simplify the structure of the battery cell side plate 1 and facilitate processing. The flow of gas in the single battery 2 through the multiple exhaust holes 200 is more regular, further improving the exhaust efficiency through the exhaust holes 200.

[0068] In some specific embodiments of the present invention, Figure 1-Figure 10As shown, there are at least two exhaust hole groups 210 distributed on at least two sides of the first explosion-proof hole 100 .

[0069] For example, in the length direction of the battery cell side plate 1, at least two exhaust hole groups 210 may be distributed on both sides of the first explosion-proof hole 100; or, in the width direction of the battery cell side plate 1, at least two exhaust hole groups 210 may be distributed on both sides of the first explosion-proof hole 100. Of course, the at least two exhaust hole groups 210 may not be limited to being located on both sides of the first explosion-proof hole 100 in the length direction or the width direction of the battery cell side plate 1, that is, the at least two exhaust hole groups 210 may be located on both sides of the first explosion-proof hole 210 in any direction, for example, the at least two exhaust hole groups 210 may be located on opposite sides or adjacent sides of the first explosion-proof hole 210.

[0070] Such a configuration is conducive to increasing the pressure on both sides of the explosion-proof valve, so that the portion of the shell 400 near the explosion-proof valve is more likely to deform during thermal runaway, so that the exhaust hole 200 and the explosion-proof valve are connected, a large amount of gas can flow to the explosion-proof valve through the exhaust hole 200, and the exhaust speed of the single battery 2 is faster.

[0071] In some specific embodiments of the present invention, Figure 1-Figure 10 As shown, at least two exhaust hole groups 210 are symmetrically arranged about the center of the first explosion-proof hole 100, which not only simplifies the structure of the battery cell side plate 1 and facilitates processing and manufacturing, but also makes the gas flow on both sides of the first explosion-proof hole 100 more regular, the part of the shell 400 near the explosion-proof valve can expand regularly during thermal runaway, and the flow of gas in the single battery 2 through the exhaust hole 200 is more regular, the exhaust hole group 210 can play a role in draining the gas, and the exhaust efficiency is higher.

[0072] In some other specific embodiments of the present invention, there are multiple exhaust holes 200 , and the multiple exhaust holes 200 are arranged along the circumference of the first explosion-proof hole 100 to form an exhaust hole group 210 .

[0073] It can be understood that the thickness of some single batteries 2 is relatively thick, and the dimension of the battery cell 500 of the single battery 2 in the thickness direction is also relatively large. By arranging multiple exhaust holes 200 along the circumference of the first explosion-proof hole 100, a circular exhaust hole group 210 can be formed. In this way, when the single battery 2 has thermal runaway, the gas generated by the battery cell 500 can flow along the circular exhaust hole group 210 to the circumference of the first explosion-proof hole 100, so that the gas pressure borne by the part of the shell 400 around the explosion-proof valve is greater, and the position of the shell 400 close to the explosion-proof valve is easier to expand when the single battery 2 has thermal runaway, so that the exhaust hole 200 can be connected to the explosion-proof valve, and the gas in the single battery 2 can flow to the explosion-proof valve through the multiple exhaust holes 200. The gas in the single battery 2 is discharged faster, and the explosion of the single battery 2 is more effectively avoided.

[0074] In some specific embodiments of the present invention, Figure 4 and Figure 6 As shown, the exhaust holes 200 close to the center of the first explosion-proof hole 100 and the exhaust holes 200 far from the center of the first explosion-proof hole 100 are staggered in the circumferential direction of the first explosion-proof hole 100 .

[0075] For example, the exhaust holes 200 of the first exhaust hole row 211 and the exhaust holes 200 of the second exhaust hole row 212 may be staggered in the width direction of the cell side plate 1 .

[0076] In this way, the gas flowing through the exhaust holes 200 close to the first explosion-proof hole 100 and the gas flowing through the exhaust holes 200 away from the first explosion-proof hole 100 can be staggered in the circumferential direction of the first explosion-proof hole 100, thereby reducing the flow interference of the two parts of gas, so that the exhaust of multiple exhaust holes 200 can be smoother, and the exhaust efficiency of the single cell 2 is higher during thermal runaway, thereby more effectively avoiding the explosion of the single cell 2, which is beneficial to improving the safety of the single cell 2.

[0077] In some specific embodiments of the present invention, Figure 1-Figure 10 As shown, the battery cell side plate 1 is provided with a heat dissipation hole 300, and the heat dissipation hole 300 and the exhaust hole 200 are arranged at intervals on the battery cell side plate 1. For example, the heat dissipation hole 300 is located on the side of the exhaust hole 200 away from the first explosion-proof hole 100. By setting the heat dissipation hole 300, the adjacent single battery cells 2 can perform heat exchange during the use of the single battery cell 2, that is, the adjacent pole cores can improve the efficiency of heat dissipation and heat exchange through the heat dissipation hole 300, so that the temperature of multiple single battery cells 2 in the battery pack is more balanced.

[0078] In the normal working process of the single battery 2, not only the heat dissipation hole 300 can play a role in heat dissipation, but also the exhaust hole 200 can play a role in heat dissipation.

[0079] Furthermore, if Figure 1-Figure 10 As shown, there are a plurality of heat dissipation holes 300 , and the plurality of heat dissipation holes 300 are distributed at intervals in the length direction and / or width direction of the battery cell side plate 1 .

[0080] For example, multiple heat dissipation holes 300 can be spaced apart in the length direction of the battery cell side plate 1; or, multiple heat dissipation holes 300 can be spaced apart in the width direction of the battery cell side plate 1; or, multiple heat dissipation holes 300 can be spaced apart in the length direction of the battery cell side plate 1, and can also be spaced apart in the width direction of the battery cell side plate 1.

[0081] In this way, along the length direction or width direction of the battery cell side plate 1, that is, along the length direction or width direction of the single battery 2, different parts of the battery cell 500 can dissipate heat through different heat dissipation holes 300, further improving the heat dissipation efficiency of the single battery 2 and the heat exchange efficiency between two adjacent single batteries 2.

[0082] In some specific embodiments of the present invention, Figure 1-Figure 10 As shown, there are multiple exhaust holes 200, and the minimum distance between two adjacent exhaust holes 200 on one side of the first explosion-proof hole 100 is d1, and the minimum distance between adjacent heat dissipation holes 300 is d2, and d1 and d2 satisfy: d1<d2.

[0083] That is to say, the exhaust holes 200 are arranged more densely, while the heat dissipation holes 300 are arranged more sparsely, which can simplify the structure of the heat dissipation holes 300 and facilitate the processing of the heat dissipation holes 300. Moreover, a larger number of exhaust holes 200 can be arranged. When thermal runaway occurs in the single cell 2, multiple exhaust holes 200 can guide a large amount of gas to the explosion-proof valve, which is beneficial to improve the exhaust efficiency of the single cell 2 when thermal runaway occurs, and has better safety.

[0084] In some specific embodiments of the present invention, the cross-sectional area of ​​the exhaust hole 200 is S1, the cross-sectional area of ​​the heat dissipation hole 300 is S2, and S1 and S2 satisfy: 0.3≤S1 / S2≤1.

[0085] That is, the cross-sectional area of ​​the exhaust hole 200 is not larger than the cross-sectional area of ​​the heat dissipation hole 300, and preferably, the cross-sectional area of ​​the exhaust hole 200 is usually set smaller than the cross-sectional area of ​​the heat dissipation hole 300, so that the multiple exhaust holes 200 can be arranged more densely, and more exhaust holes 200 can be arranged in the length direction and width direction of the battery cell side plate 1, which can ensure that the structural strength of the battery cell side plate 1 at the position where the exhaust holes 200 are arranged can be higher and the battery cell side plate 1 is not easy to break, and can also ensure that the air flow rate of the multiple exhaust holes 200 can be larger and the exhaust rate is faster.

[0086] In some specific embodiments of the present invention, the cross-sectional area of ​​the exhaust hole 200 is S1, the cross-sectional area of ​​the first explosion-proof hole 100 is S3, and S1 and S3 satisfy: S1≤S3.

[0087] It can be understood that the battery cell side plate 1 of the embodiment of the utility model not only serves to drain when the single cell 2 has thermal runaway, but also is used to support the battery cell 500. Such a configuration can avoid the cross-sectional area of ​​the exhaust hole 200 being too large, so that the structural strength of the battery cell side plate 1 near the exhaust hole 200 can still be maintained at a high level, the battery cell side plate 1 is not easy to be deformed and damaged, and the battery cell side plate 1 can provide sufficient supporting force, thereby more effectively supporting and protecting the battery cell 500, making the battery cell 500 not easy to be deformed and damaged.

[0088] In some specific embodiments of the present invention, the cross-sectional area of ​​the first explosion-proof hole 100 is S3, the area of ​​one side of the battery cell side plate 1 in the thickness direction is S4, and S3 and S4 satisfy: 0.02≤S3 / S4≤0.5.

[0089] Therefore, the cross-sectional area of ​​the first explosion-proof hole 100 will not be too small, so that when the single cell 2 has thermal runaway, the gas in the single cell 2 can flow to the explosion-proof valve through the first explosion-proof hole 100, the gas flow is smoother, and the single cell 2 can discharge the gas more quickly when thermal runaway occurs. Moreover, the cross-sectional area of ​​the first explosion-proof hole 100 will not be too large, which can avoid the cross-sectional area of ​​the first explosion-proof hole 100 being set too large and causing the structural strength of the battery cell side plate 1 to decrease, so that the structural strength of the battery cell side plate 1 can be higher, the battery cell side plate 1 is not easy to be deformed and damaged, and the battery cell side plate 1 can provide sufficient supporting force, so that the battery cell 500 can be more effectively supported and protected, so that the battery cell 500 is not easy to be deformed and damaged.

[0090] In some specific embodiments of the present invention, Figure 1-Figure 10 As shown, the shape of the exhaust hole 200 is at least one of a circle, a line and a polygon, so that the shape of the exhaust hole 200 can be set to be more regular and easy to process. Of course, the shape of the exhaust hole 200 can also be other shapes.

[0091] In some specific embodiments of the present invention, Fig. 9 As shown, the exhaust hole 200 is configured as an elongated hole extending along the width direction or the length direction of the battery cell side plate 1 , that is, the cross-sectional shape of the exhaust hole 200 is an elongated strip extending along the width direction or the length direction of the battery cell side plate 1 .

[0092] For example, a plurality of exhaust holes 200 may be arranged at intervals along the length direction of the battery cell side plate 1 and disposed on two opposite radial sides of the first explosion-proof hole 100, and each exhaust hole 200 extends into a long strip along the width direction of the battery cell side plate 1; or, a plurality of exhaust holes 200 may be arranged at intervals along the width direction of the battery cell side plate 1 and disposed on two opposite radial sides of the first explosion-proof hole 100, and each exhaust hole 200 extends into a long strip along the length direction of the battery cell side plate 1. In this way, the structure of the exhaust holes 200 can be simplified, the processing is more convenient, and the cross-sectional area of ​​a single exhaust hole 200 can be set larger, and the exhaust efficiency is higher, so that the exhaust of the single battery 2 is faster and safer when thermal runaway occurs.

[0093] In other specific embodiments of the present invention, Fig.10 As shown, the exhaust hole 200 is constructed as an elongated hole having an angle α with the width direction or the length direction of the battery cell side plate 1, that is, the cross-sectional shape of the exhaust hole 200 is a straight line having an angle α with the width direction or the length direction of the battery cell side plate 1, and the angle α satisfies: 0°<α<90°, that is, the exhaust hole 200 is arranged as an elongated hole inclined relative to the length direction or the width direction of the battery cell side plate 1. With this arrangement, the structure of the exhaust hole 200 is relatively simple and the processing is also relatively convenient. At the same time, the exhaust hole 200 can better drain the gas in the single cell 2, and the gas can flow in the direction close to the first explosion-proof hole 100, so that the gas in the single cell 2 can more easily flow to the explosion-proof valve when thermal runaway occurs, so as to quickly discharge the gas in the single cell 2, avoid the expansion and explosion of the single cell 2, and improve safety.

[0094] In other specific embodiments of the present invention, Figure 7 and Figure 8 As shown, the exhaust hole 200 includes a first subsection 220 and a second subsection 230 .

[0095] Along the direction perpendicular to the axial direction of the first explosion-proof hole 100 of the battery cell side plate 1, the first sub-segment 220 gradually approaches the first explosion-proof hole 100, and the second sub-segment 230 gradually approaches the first explosion-proof hole 100. One end of the first sub-segment 220 close to the first explosion-proof hole 100 is connected to one end of the second sub-segment 230 close to the first explosion-proof hole 100. The first sub-segment 220 and the second sub-segment 230 are symmetrically arranged about the direction perpendicular to the axial direction of the first explosion-proof hole 100. Among them, the exhaust hole 200 can be in a ">" shape or a "<" shape. That is, one end of the first sub-segment 220 is connected to one end of the second sub-segment 230, and the distance between the first sub-segment 220 and the second sub-segment 230 gradually increases in the direction away from the first explosion-proof hole 100. The first sub-segment 220 and the second sub-segment 230 are symmetrically arranged about the width bisector of the battery cell side plate 1.

[0096] For example, along the width direction of the battery cell side plate 1, close to the first explosion-proof hole 100, the first sub-segment 220 gradually approaches the first explosion-proof hole 100, and the second sub-segment 230 gradually approaches the first explosion-proof hole 100, then the first sub-segment 220 and the second sub-segment 230 can be symmetrically arranged about the center line of the length direction of the battery cell side plate 1; or, along the length direction of the battery cell side plate 1, close to the first explosion-proof hole 100, the first sub-segment 220 gradually approaches the first explosion-proof hole 100, and the second sub-segment 230 gradually approaches the first explosion-proof hole 100, then the first sub-segment 220 and the second sub-segment 230 can be symmetrically arranged about the center line of the width direction of the battery cell side plate 1.

[0097] In this way, the first sub-segment 220 and the second sub-segment 230 of the single exhaust hole 200 can be symmetrically arranged, that is, the structural arrangement of the single exhaust hole 200 can be more regular, and the gas flow is more regular. Moreover, the exhaust hole 200 can be arrow-shaped, and the gas in the first sub-segment 220 can flow toward the direction close to the first explosion-proof hole 100, and the gas in the second sub-segment 230 can also flow toward the direction close to the first explosion-proof hole 100, that is, the first sub-segment 220 and the second sub-segment 230 can respectively drain the gas so that the gas in the single cell 2 can flow to the explosion-proof valve, so that the gas can be quickly discharged when the single cell 2 has thermal runaway, the exhaust efficiency is higher, the safety is better, and the explosion caused by the expansion of the single cell 2 is more effectively avoided.

[0098] In some specific embodiments of the present invention, Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, there are at least two first explosion-proof holes 100 , which are spaced apart in the length direction and / or width direction of the battery cell side plate 1 .

[0099] For example, at least two first explosion-proof holes 100 may be spaced apart in the length direction of the battery cell side plate 1; or, at least two first explosion-proof holes 100 may be spaced apart in the width direction of the battery cell side plate 1; or, at least two first explosion-proof holes 100 may be spaced apart in the length direction of the battery cell side plate 1, and may also be spaced apart in the width direction of the battery cell side plate 1.

[0100] Among them, the first explosion-proof holes 100 correspond one-to-one to the explosion-proof valves on the sides of the single cells 2. When there are multiple explosion-proof valves on the sides of the single cells 2, there are also multiple first explosion-proof holes 100. In this way, when thermal runaway occurs in the single cells 2, exhaust can be carried out through multiple first explosion-proof holes 100 and multiple explosion-proof valves, which more effectively improves the exhaust efficiency of the single cells 2 and makes the explosion-proof safety of the single cells 2 higher.

[0101] In some specific embodiments of the present invention, the thickness of the battery cell side plate 1 is D, and D satisfies: 0.5 mm<D<12 mm.

[0102] For example, the thickness D of the battery cell side plate 1 can be 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm or 12 mm.

[0103] In this way, on the one hand, the thickness of the battery cell side plate 1 can be prevented from being too thin, so that the structural strength of the battery cell side plate 1 can be higher, so that the battery cell side plate 1 can provide sufficient supporting force for the battery cell 500 to prevent the battery cell 500 from being deformed. On the other hand, the thickness of the battery cell side plate 1 can be prevented from being too thick, and then the battery cell side plate 1 can be prevented from occupying too much space in the single battery cell 2, which is convenient for assembly and can ensure that the energy density of the single battery cell 2 is relatively high.

[0104] In some specific embodiments of the present invention, Figure 4 and Figure 6 As shown, along the axial direction perpendicular to the first explosion-proof hole 100, the number of the exhaust holes 200 gradually decreases in the direction away from the center of the first explosion-proof hole 100. In this way, along the direction close to the first explosion-proof hole 100, the amount of gas passing through the exhaust holes 200 can gradually increase, and the pressure on the shell 400 closer to the explosion-proof valve is greater, so that the shell 400 is more likely to be deformed by force at the part close to the explosion-proof valve, and the exhaust holes 200 close to the first explosion-proof hole 100 are more likely to be connected with the explosion-proof valve when the single cell 2 has thermal runaway, and a large amount of gas can flow to the explosion-proof valve through the exhaust holes 200, and multiple exhaust holes 200 can play a role in draining the gas, so the exhaust efficiency of the single cell 2 is higher, and the expansion of the single cell 2 is more effectively avoided.

[0105] For example, Figure 4 and Figure 6 As shown, the exhaust hole group 210 may include at least one first exhaust hole column 211 and at least one second exhaust hole column 212 .

[0106] The first exhaust hole column 211 is close to the first explosion-proof hole 100, and the exhaust holes 200 in the first exhaust hole column 211 are arranged in the width direction (or length direction) of the battery cell side plate 1, and the second exhaust hole column 212 is located on the side of the first exhaust hole column 211 away from the first explosion-proof hole 100, and the exhaust holes 200 in the second exhaust hole column 212 are arranged in the width direction (or length direction) of the battery cell side plate 1, and the number of exhaust holes 200 in the second exhaust hole column 212 is less than the number of exhaust holes 200 in the first exhaust hole column 211.

[0107] Furthermore, the number of the first exhaust hole arrays 211 is greater than the number of the second exhaust hole arrays 212 .

[0108] In this way, the amount of gas passing through the exhaust holes 200 can be gradually increased along the length direction (or width direction) of the battery cell side plate 1. Specifically, the number of exhaust holes 200 in the first exhaust hole column 211 is greater than the number of exhaust holes 200 in the second exhaust hole 200, and more gas can flow to the first exhaust hole column 211, so that the air flow rate of the exhaust hole group 210 close to the first explosion-proof hole 100 can be larger, and the shell 400 is subjected to greater pressure at a position closer to the explosion-proof valve, so that the shell 400 is more susceptible to force and deformation at a position close to the explosion-proof valve. The exhaust hole group 210 can be connected to the explosion-proof valve when the single cell 2 has thermal runaway, and a large amount of gas can flow to the explosion-proof valve through the exhaust hole group 210, and the exhaust hole group 210 can play a role in draining the gas, so the exhaust efficiency of the single cell 2 is higher, and the expansion of the single cell 2 is more effectively avoided.

[0109] In other specific embodiments of the present invention, Figure 4 and Figure 6 As shown, the battery cell side plate 1 has a plurality of exhaust areas, and the plurality of exhaust areas are arranged in a direction away from the first explosion-proof hole 100; wherein, along the direction away from the first explosion-proof hole 100, the number of exhaust holes 200 in the plurality of exhaust areas gradually decreases.

[0110] For example, the battery cell side plate 1 has a first exhaust area and a second exhaust area, the first exhaust area is located between the first explosion-proof hole 100 and the second exhaust area, a plurality of first exhaust hole columns 211 are arranged in the first exhaust area, a plurality of second exhaust hole columns 212 are arranged in the second exhaust area, the number of first exhaust hole columns 211 is greater than the number of second exhaust hole columns 212, and the number of exhaust holes 200 in the first exhaust hole column 211 is greater than the number of exhaust holes 200 in the second exhaust hole column 212. In this way, more gas can flow to the first exhaust area, so that the gas flow in the first exhaust area close to the first explosion-proof hole 100 can be larger, and the shell 400 is subjected to greater pressure at a position closer to the explosion-proof valve, so that the shell 400 is more susceptible to force and deformation at a position close to the explosion-proof valve. The exhaust hole group 210 can be connected to the explosion-proof valve when thermal runaway occurs in the single cell 2, and a large amount of gas can flow to the explosion-proof valve through the exhaust hole group 210, and the exhaust hole group 210 can play a role in draining the gas, so the exhaust efficiency of the single cell 2 is higher, and the expansion of the single cell 2 is more effectively avoided.

[0111] It should be emphasized that the gradual reduction in the above two embodiments can be a linear reduction, that is, the number of exhaust holes 200 that decreases step by step is the same, or it can be a nonlinear reduction, that is, the number of exhaust holes 200 that decreases step by step is different.

[0112] The side surface of the cell side plate 1 facing the cell 500 is configured as a first assembly plane, and the side surface of the cell side plate 1 facing the housing 400 is configured as a second assembly plane. In other words, both side surfaces of the cell side plate 1 are assembly planes, which allow the cell side plate 1 to be assembled with the corresponding cell 500 and housing 400, respectively, so as to ensure the assembly stability of the cell 500 and facilitate exhaust at the explosion-proof area of ​​the cell side plate 1 when the cell 500 expands and catches fire.

[0113] A single cell 2 according to an embodiment of the present invention is described below with reference to the accompanying drawings. The single cell 2 includes a housing 400 , a battery cell 500 , an explosion-proof valve, and a battery cell side plate 1 according to the above embodiment of the present invention.

[0114] The housing 400 is provided with a second explosion-proof hole 410, the battery cell 500 is provided in the housing 400, the explosion-proof valve is provided in the second explosion-proof hole 410, and the battery cell side plate 1 is suitable for being provided between the battery cell 500 and the housing 400. For example, the battery cell side plate 1 can be provided between the side surface of the battery cell 500 in the thickness direction and the housing 400, or the battery cell side plate 1 can be provided between the side surface of the battery cell 500 in the width direction and the housing 400.

[0115] According to the single cell battery 2 of the embodiment of the utility model, by utilizing the battery cell side plate 1 according to the above-mentioned embodiment of the utility model, the pressure around the explosion-proof valve on the side of the single cell battery 2 can be increased, and the gas in the single cell battery 2 can be quickly discharged in the event of thermal runaway, thereby improving the safety of the single cell battery 2.

[0116] In some specific embodiments of the present invention, the surface area of ​​one side of the battery cell side plate 1 in the thickness direction is S4, and the surface area of ​​one side of the battery cell 500 in the width direction is S5; wherein S4 and S5 satisfy: 0.5≤S4 / S5≤1.

[0117] This can prevent the side area of ​​the battery cell side plate 1 in the thickness direction from being too small, so that the contact area between the battery cell side plate 1 and the battery cell 500 can be larger, the battery cell side plate 1 can better support the battery cell 500, and the battery cell 500 is less likely to deform. It can also prevent the side area of ​​the battery cell 500 in the thickness direction from being too large. The space occupied by the battery cell side plate 1 in the single battery cell 2 will not be too large, and it is easy to assemble the battery cell side plate 1 and the battery cell 500 into the shell 400, making the assembly more convenient.

[0118] In some specific embodiments of the present invention, the central axis of the first explosion-proof hole 100 coincides with the central axis of the second explosion-proof hole 410, the cross-sectional area of ​​the first explosion-proof hole 100 is S3, and the cross-sectional area of ​​the second explosion-proof hole 410 is S6; wherein S3 and S6 satisfy: 0.2≤S3 / S6≤1.2.

[0119] In this way, the difference between the cross-sectional area of ​​the first explosion-proof hole 100 and the cross-sectional area of ​​the second explosion-proof hole 410 will not be too large. On the one hand, it can prevent the cross-sectional area of ​​the first explosion-proof hole 100 from being too small, thereby ensuring that the gas flow through the first explosion-proof hole 100 can be large, so that the gas can flow from the first explosion-proof hole 100 to the second explosion-proof hole 410 through the first explosion-proof hole 100, so that when the single cell 2 has thermal runaway, the explosion-proof valve can be opened and the single cell 2 can be discharged through the second explosion-proof hole 410. On the other hand, it can prevent the cross-sectional area of ​​the first explosion-proof hole 100 from being too large, so that the structural strength of the battery cell side plate 1 can be prevented from being reduced due to the excessive cross-sectional area of ​​the first explosion-proof hole 100. The battery cell side plate 1 can more reliably support the battery cell 500, effectively preventing the battery cell 500 from being deformed and damaged.

[0120] A battery pack according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The battery pack includes a single battery 2 according to the above embodiment of the present invention.

[0121] According to the battery pack of the embodiment of the utility model, by utilizing the single cell 2 according to the above embodiment of the utility model, the gas in the single cell 2 can be quickly discharged in the event of thermal runaway, the safety of the single cell 2 is higher, and the safety of the battery pack is higher.

[0122] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes a battery pack according to the above embodiment of the present invention.

[0123] The vehicle according to the embodiment of the present invention utilizes the battery pack according to the above embodiment of the present invention, so that the gas in the single battery 2 can be quickly discharged in the event of thermal runaway, thereby improving safety.

[0124] The cell side plate 1, the single battery 2, the battery pack and other structures and operations of the vehicle according to the embodiment of the utility model are well known to ordinary technicians in this field and will not be described in detail here.

[0125] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0126] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell side plate, characterized in that: The battery cell side plate is suitable for being arranged between the battery cell and the shell, and a first explosion-proof hole is formed on the battery cell side plate, and the first explosion-proof hole is used to be arranged opposite to the explosion-proof valve of the shell; Wherein, the battery core side plate is provided with an exhaust hole, and the exhaust hole is adjacent to the first explosion-proof hole, and the exhaust hole is used to exhaust and drain air in a direction close to the first explosion-proof hole.

2. The battery cell side plate according to claim 1, characterized in that: There are a plurality of exhaust holes, and the plurality of exhaust holes are distributed in rows and / or columns to form an exhaust hole group around the first explosion-proof hole.

3. The battery cell side plate according to claim 2, characterized in that: There are at least two exhaust hole groups distributed on at least two sides of the first explosion-proof hole.

4. The battery cell side plate according to claim 3, characterized in that: The at least two exhaust hole groups are symmetrically arranged about the center of the first explosion-proof hole.

5. The battery cell side plate according to claim 1, characterized in that: There are a plurality of exhaust holes, and the plurality of exhaust holes are arranged along the circumference of the first explosion-proof hole to form an exhaust hole group.

6. The battery cell side plate according to claim 5, characterized in that: The exhaust hole close to the center of the first explosion-proof hole and the exhaust hole far from the center of the first explosion-proof hole are staggered in the circumferential direction of the first explosion-proof hole.

7. The battery cell side plate according to claim 1, characterized in that: The battery cell side plate is provided with heat dissipation holes, and the heat dissipation holes and the exhaust holes are arranged at intervals on the battery cell side plate.

8. The battery cell side plate according to claim 7, characterized in that: There are a plurality of heat dissipation holes, and the plurality of heat dissipation holes are distributed at intervals in the length direction and / or the width direction of the battery core side plate.

9. The battery cell side plate according to claim 8, characterized in that: There are multiple exhaust holes, and the minimum distance between two adjacent exhaust holes on one side of the first explosion-proof hole is d1, and the minimum distance between adjacent heat dissipation holes is d2, and d1 and d2 satisfy: d1<d2.

10. The battery cell side plate according to claim 7, characterized in that: The cross-sectional area of ​​the exhaust hole is S1, the cross-sectional area of ​​the heat dissipation hole is S2, and S1 and S2 satisfy: 0.3≤S1 / S2≤1.

11. The battery cell side plate according to claim 1, characterized in that: The cross-sectional area of ​​the exhaust hole is S1, the cross-sectional area of ​​the first explosion-proof hole is S3, and S1 and S3 satisfy: S1≤S3.

12. The battery cell side plate according to claim 1, characterized in that: The cross-sectional area of ​​the first explosion-proof hole is S3, the area of ​​one side of the battery cell side plate in the thickness direction is S4, and S3 and S4 satisfy: 0.02≤S3 / S4≤0.

5.

13. The battery cell side plate according to claim 1, characterized in that: The exhaust hole has a shape of at least one of a circle, a line and a polygon.

14. The battery cell side plate according to claim 13, characterized in that: The exhaust hole is configured as an elongated hole extending along the width direction or the length direction of the battery cell side plate; or The exhaust hole is configured as an elongated hole having an angle α with the width direction or the length direction of the battery cell side plate, and the angle α satisfies: 0°<α<90°.

15. The battery cell side plate according to claim 13, characterized in that: The exhaust hole includes: a first sub-segment and a second sub-segment, which are close to the first explosion-proof hole along a direction perpendicular to the axial direction of the first explosion-proof hole, the first sub-segment gradually approaches the first explosion-proof hole, the second sub-segment gradually approaches the first explosion-proof hole, one end of the first sub-segment close to the first explosion-proof hole is connected to one end of the second sub-segment close to the first explosion-proof hole, and the first sub-segment and the second sub-segment are symmetrically arranged with respect to the direction perpendicular to the axial direction of the first explosion-proof hole.

16. The battery cell side plate according to claim 1, characterized in that: There are at least two first explosion-proof holes, which are spaced apart in the length direction and / or width direction of the battery core side plate.

17. The battery cell side plate according to claim 1, characterized in that: The thickness of the battery cell side plate is D, and D satisfies: 0.5mm<D<12mm.

18. The battery cell side plate according to any one of claims 1 to 17, characterized in that: Along a direction perpendicular to the axial direction of the first explosion-proof hole, the number of the exhaust holes gradually decreases in a direction away from the center of the first explosion-proof hole.

19. The battery cell side plate according to any one of claims 1 to 17, characterized in that: The battery cell side plate has a plurality of exhaust areas, and the plurality of exhaust areas are arranged in a direction away from the first explosion-proof hole; Wherein, along the direction away from the first explosion-proof hole, the number of the exhaust holes in the plurality of exhaust areas gradually decreases.

20. A single cell battery, characterized in that: include: A shell, wherein the shell is provided with a second explosion-proof hole; A battery cell, wherein the battery cell is disposed in the housing; An explosion-proof valve, the explosion-proof valve being arranged at the second explosion-proof hole; According to any one of claims 1 to 19, the battery cell side plate is suitable for being arranged between the battery cell and the shell.

21. The single cell according to claim 20, characterized in that: The surface area of ​​one side of the battery cell side plate in the thickness direction is S4, and the surface area of ​​one side of the battery cell in the width direction is S5; Among them, S4 and S5 satisfy: 0.5≤S4 / S5≤1.

22. The single cell according to claim 20, characterized in that: The central axis of the first explosion-proof hole coincides with the central axis of the second explosion-proof hole, the cross-sectional area of ​​the first explosion-proof hole is S3, and the cross-sectional area of ​​the second explosion-proof hole is S6; Among them, S3 and S6 satisfy: 0.2≤S3 / S6≤1.

2.

23. A battery pack, characterized in that: A single cell comprising any one of claims 20-22.

24. A vehicle, characterized in that: Comprising a battery pack according to claim 23.

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