Battery and battery pack with same

Abstract

The utility model discloses a battery and a battery pack with the same. The battery comprises a shell, a pole group and a side plate, the pole group is arranged in the shell; the side plate is arranged in the shell and located between the pole group and a wall plate of the shell, first exhaust spaces are constructed between the side plate and the pole group, second exhaust spaces are constructed between the side plate and the wall plate, the number of the first exhaust spaces and the number of the second exhaust spaces are both multiple, and the first exhaust spaces and the second exhaust spaces are alternately arranged in the length direction of the side plate; a plurality of exhaust through holes are further formed in the side plate and used for communicating the adjacent first exhaust space and second exhaust space. The first exhaust space and the second exhaust space are formed between the side plate and the wall plate of the shell, and the exhaust through holes are formed in the side plate to communicate the first exhaust space with the second exhaust space, so that protection on the pole group is enhanced, high-pressure gas in the shell can flow in the shell more smoothly, and the service life of the pole group is prolonged. And therefore, the safety of the pole group is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and a battery pack having the same. Background Art

[0002] When the electrode group in the existing power battery vehicle is squeezed and invaded, the electrode group is easily deformed and damaged. In order to protect the safety of the electrode group, the existing electrode group will be provided with a side plate of a certain thickness between the electrode group and the wall of the electrode group shell to resist external squeezing and invasion.

[0003] However, the existing side panels do not have an ideal shock-absorbing and buffering effect when subjected to impact. At the same time, when the gas pressure inside the pole group shell is relatively high, the design of the side panels will also affect the discharge of high-pressure gas. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery with good shock absorption and buffering performance.

[0005] According to the battery of the embodiment of the utility model, it includes: a shell, a pole group and a side plate; the pole group is installed in the shell; the side plate is arranged in the shell and is located between the pole group and a wall plate of the shell, a first exhaust space is constructed between the side plate and the pole group, and a second exhaust space is constructed between the side plate and the wall plate, a plurality of first exhaust spaces and a plurality of second exhaust spaces are provided, and they are alternately arranged along the length direction of the side plate, wherein a plurality of exhaust through holes are also provided on the side plate, and the exhaust through holes are used to connect adjacent first exhaust spaces and second exhaust spaces.

[0006] According to the battery of the embodiment of the utility model, a first exhaust space and a second exhaust space are constructed between the side plate and the wall plate of the shell, and a plurality of exhaust through holes are provided on the side plate to connect the first exhaust space and the second exhaust space. In this way, not only the protection of the electrode group is strengthened, but also the high-pressure gas inside the shell can flow more smoothly inside the shell and be discharged from the shell more quickly, thereby realizing rapid pressure relief inside the shell to ensure the safety of the electrode group.

[0007] In addition, the battery according to the utility model may also have the following additional technical features:

[0008] In some embodiments, the side plate is bent in a direction away from the pole group to construct a first groove constituting the first exhaust space, and the side plate is bent in a direction away from the wall plate to construct a second groove constituting the second exhaust space.

[0009] In some embodiments, the exhaust through hole is disposed on the side plate between the first groove and the second groove.

[0010] In some embodiments, in the length direction of the side plate, the distance a between two adjacent exhaust holes satisfies: 10 mm ≤ a ≤ 50 mm.

[0011] In some embodiments, the side plate at the first groove and the side plate at the second groove are connected by an arc transition.

[0012] In some embodiments, the radius R of the arc satisfies: 1mm≤R≤5mm.

[0013] In some embodiments, the thickness H of the side panel satisfies: 0.5≤H≤1.5mm.

[0014] In some embodiments, the battery further includes an insulating film, the insulating film is coated on the outer surface of the electrode group, and the side plate is located between the insulating film and the electrode group.

[0015] In some embodiments, a plurality of matching holes are provided on the insulating film, the number of the matching holes is less than or equal to the number of the exhaust through holes, and each of the matching holes is respectively opposite to one of the plurality of exhaust through holes.

[0016] The utility model also provides a battery pack having the above embodiment.

[0017] The battery pack according to the embodiment of the utility model comprises: the battery of the above embodiment. By arranging the battery of the above embodiment, the overall safety performance of the battery pack can be effectively improved.

[0018] 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

[0019] Figure 1 is an exploded diagram of a battery according to an embodiment of the utility model;

[0020] Figure 2 is based on Figure 1 A magnified image of area A;

[0021] Figure 3 is a front view of a side plate of a battery according to an embodiment of the utility model;

[0022] Figure 4 is based on Figure 3 Enlarged view of area B;

[0023] Figure 5 is a side view of a side plate of a battery according to an embodiment of the utility model;

[0024] Figure 6 is based on Figure 5 Magnified view of area C.

[0025] Reference numerals:

[0026] 100. Battery;

[0027] 1. Shell;

[0028] 2. side plate; 21. exhaust hole; 22. first groove; 23. second groove;

[0029] 3. The first exhaust space; 4. The second exhaust space. DETAILED DESCRIPTION

[0030] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] 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", "clockwise", "counterclockwise", "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.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 6 A battery 100 according to an embodiment of the present invention is described.

[0035] like Figures 1 to 6 As shown, the battery 100 according to the embodiment of the utility model comprises: a shell 1, a pole group and a side plate 2; the pole group is installed in the shell 1; the side plate 2 is arranged in the shell 1 and is located between the pole group and a wall plate of the shell 1, a first exhaust space 3 is constructed between the side plate 2 and the pole group, and a second exhaust space 4 is constructed between the side plate 2 and the wall plate, and a plurality of first exhaust spaces 3 and second exhaust spaces 4 are provided, and are alternately arranged along the length direction of the side plate 2, wherein a plurality of exhaust through holes 21 are also provided on the side plate 2, and the exhaust through holes 21 are used to connect the adjacent first exhaust spaces 3 and second exhaust spaces 4.

[0036] In this embodiment, the side plate 2 can enhance the protection of the pole group; when the wall surface of the shell 1 on the side where the side plate 2 is provided is impacted, the side plate 2 can better absorb the impact and reduce the impact of vibration on the pole group; when a sharp object pierces the wall surface of the shell 1 on the side where the side plate 2 is provided, the side plate 2 can resist the sharp object to protect the safety of the pole group.

[0037] Furthermore, the exhaust through hole 21 is arranged to connect the adjacent first exhaust space 3 and second exhaust space 4, so that the connectivity of the space inside the shell 1 on the side where the side plate 2 is arranged is stronger. In this way, when the electrode group is damaged to discharge the high-pressure gas, or the air pressure inside the shell 1 increases, the high-pressure gas can pass through the space inside the shell 1 on the side where the side plate 2 is arranged more smoothly, so that the high-pressure gas can reach the explosion-proof valve on the shell 1 more quickly and be discharged from the shell 1 from the explosion-proof valve, thereby realizing rapid pressure relief inside the shell 1 to ensure the safety of the battery 100.

[0038] According to the battery 100 of the embodiment of the utility model, a first exhaust space 3 and a second exhaust space 4 are constructed between the side plate 2 and the wall plate of the shell 1, and a plurality of exhaust through holes 21 are provided on the side plate 2 to connect the first exhaust space 3 and the second exhaust space 4. In this way, not only the protection of the electrode group is strengthened, but also the high-pressure gas inside the shell 1 can flow more smoothly inside the shell 1 and be discharged from the shell 1 more quickly, thereby realizing rapid pressure relief inside the shell 1 to ensure the safety of the electrode group.

[0039] In one embodiment of the present invention, Figures 1 to 6 As shown, the side plate 2 is bent in a direction away from the pole group to form a first groove 22 constituting the first exhaust space 3 , and the side plate 2 is bent in a direction away from the wall plate to form a second groove 23 constituting the second exhaust space 4 .

[0040] In this embodiment, the bending design of the side panel 2 significantly improves the overall deformation energy absorption capacity of the side panel 2; when the wall surface of the shell 1 on the side where the side panel 2 is provided is squeezed or impacted, the side panel 2 can absorb the pressure or impact force by changing its own shape to reduce the impact of the pressure or impact force on the battery 100. At the same time, the bending design of the side panel 2 can also better absorb vibration to reduce the impact of vibration on the battery 100.

[0041] In a specific embodiment of the present invention, Figures 1 to 6 As shown, the exhaust hole 21 is arranged on the side plate 2 between the first groove 22 and the second groove 23, so that the exhaust hole 21 can effectively connect the first exhaust space 3 in the first groove 22 and the second exhaust space 4 in the second groove 23 to make the gas flow smoother.

[0042] In one embodiment of the present invention, in the length direction of the side plate 2, the distance a between two adjacent exhaust holes 21 satisfies: 10 mm ≤ a ≤ 50 mm.

[0043] In the present embodiment, when the spacing a between two adjacent exhaust through holes 21 is less than 10 mm, the spacing between adjacent exhaust through holes 21 is too small, which may easily cause the local structural strength of the side plate 2 to be insufficient, thereby failing to effectively protect the electrode group; when the spacing a between two adjacent exhaust through holes 21 is greater than 50 mm, the spacing between adjacent exhaust through holes 21 is too large, thus resulting in an unsatisfactory ventilation effect of the exhaust through holes 21, failing to effectively conduct the high-pressure gas; when the spacing a between two adjacent exhaust through holes 21 satisfies: 10 mm ≤ a ≤ 50 mm, the side plate 2 can not only effectively protect the safety of the electrode group, but also the exhaust through holes 21 on the side plate 2 can effectively conduct the high-pressure gas.

[0044] In one embodiment of the present invention, Figures 1 to 6 As shown, the side plate 2 at the first groove 22 and the side plate 2 at the second groove 23 are connected by an arc transition. In this way, when the side plate 2 is squeezed or impacted, the stress concentration at various parts of the side plate 2 can be effectively prevented, so that the service life of the side plate 2 can be effectively extended. At the same time, the side plate 2 with an arc transition design can also avoid scratching or puncturing the pole group.

[0045] In a specific embodiment, for example Figure 5 and Figure 6 As shown, the side plate 2 is wavy in shape as a whole.

[0046] In a specific embodiment of the present invention, the radius R of the arc satisfies: 1mm≤R≤5mm.

[0047] In this specific embodiment, when the radius R of the arc is less than 1mm, the curvature of the arc is too small to effectively prevent stress concentration on the side panel 2; when the radius R of the arc is greater than 5mm, the curvature of the arc is too large, which will reduce the overall structural strength and support of the side panel 2, thereby failing to effectively protect the pole group; when the radius R of the arc satisfies: 1mm<R<5mm, it can not only effectively prevent stress concentration on the side panel 2, but also ensure that the side panel 2 has sufficient structural strength and support.

[0048] In one embodiment of the present invention, the thickness H of the side plate 2 satisfies: 0.5≤H≤1.5 mm.

[0049] In the present embodiment, when the thickness H of the side panel 2 is less than 0.5 mm, the thickness of the side panel 2 is too thin, and the overall structural strength and support are insufficient to effectively protect the electrode group. At the same time, the thickness of the side panel 2 is too thin, and it is easy to collapse or deform and be damaged when squeezed or impacted, so that the exhaust through hole 21 on the side panel 2 cannot effectively conduct the high-pressure gas; when the thickness H of the side panel 2 is less than 1.5 mm, the thickness of the side panel 2 is too thick, which not only increases the manufacturing cost of the side panel 2, but also increases the overall volume of the side panel 2, so that the side panel 2 occupies more internal space of the shell 1, squeezing the installation space of the electrode group; when the thickness H of the side panel 2 satisfies: 0.5≤H≤1.5 mm, it can not only ensure that the side panel 2 has sufficient structural strength and support, but also ensure that the side panel 2 does not occupy too much internal space of the shell 1, so as to ensure that the electrode group has sufficient installation space.

[0050] In one embodiment of the present invention, the battery 100 further includes an insulating film, which is coated on the outer surface of the electrode group, and the side plate 2 is located between the insulating film and the electrode group. In this embodiment, the insulating film can play the role of electrical insulation, dust and moisture resistance.

[0051] In a specific embodiment of the utility model, a plurality of matching holes are provided on the insulating film, the number of the matching holes is less than or equal to the number of the exhaust holes 21, and each matching hole is respectively opposite to one of the plurality of exhaust holes 21. In this way, it can ensure that the insulating film can play the role of electrical insulation, dustproof and moisture-proof, and can also ensure the normal conduction of the exhaust holes 21.

[0052] In a specific embodiment, the shell 1 of the battery 100 is made by a welding process, and has a weld on the shell 1. The side plate 2 is placed on the wall of the shell 1 on the side having the weld and covers the weld. In this way, the side plate 2 can prevent the burrs on the weld from piercing the electrode group.

[0053] The utility model also provides a battery pack having the above embodiment.

[0054] The battery pack according to the embodiment of the present invention includes: the battery 100 of the above embodiment. By providing the battery 100 of the above embodiment, the overall safety performance of the battery pack can be effectively improved.

[0055] Other structures and operations of the battery 100 and the battery pack according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] 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, characterized in that: include: case; A pole group, the pole group is installed in the shell; A side plate, wherein the side plate is arranged in the shell and is located between the pole group and a wall plate of the shell, a first exhaust space is constructed between the side plate and the pole group, and a second exhaust space is constructed between the side plate and the wall plate. A plurality of the first exhaust spaces and a plurality of the second exhaust spaces are provided, and are alternately arranged along the length direction of the side plate, wherein a plurality of exhaust through holes are also provided on the side plate, and the exhaust through holes are used to connect the adjacent first exhaust space and second exhaust space.

2. The battery according to claim 1, characterized in that The side plate is bent in a direction away from the pole group to construct a first groove constituting the first exhaust space, and the side plate is bent in a direction away from the wall plate to construct a second groove constituting the second exhaust space.

3. The battery according to claim 2, characterized in that The exhaust through hole is disposed on the side plate between the first groove and the second groove.

4. The battery according to claim 1, characterized in that In the length direction of the side plate, the distance a between two adjacent exhaust holes satisfies: 10mm≤a≤50mm.

5. The battery according to claim 2, characterized in that The side plate at the first groove and the side plate at the second groove are connected by an arc transition.

6. The battery according to claim 5, characterized in that The radius R of the arc satisfies: 1mm≤R≤5mm.

7. The battery according to claim 1, characterized in that The thickness H of the side plate satisfies: 0.5≤H≤1.5mm.

8. The battery according to claim 1, characterized in that It also includes an insulating film, which is coated on the outer surface of the pole group, and the side plate is located between the insulating film and the pole group.

9. The battery according to claim 8, characterized in that The insulating film is provided with a plurality of matching holes, the number of the matching holes is less than or equal to the number of the exhaust through holes, and each of the matching holes is respectively opposite to one of the plurality of exhaust through holes.

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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