Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a shell, a roll core and a connecting piece, a mounting cavity is formed in the shell, an inwards-shrinking part is formed in the shell, the inwards-shrinking part protrudes towards the interior of the mounting cavity, the roll core is arranged in the mounting cavity and located between the inwards-shrinking part and the inner bottom wall of the shell, and the connecting piece is partially arranged between the inwards-shrinking part and the roll core. The connecting piece abuts against the side, away from the inner bottom wall of the shell, of the roll core. And in the radial direction of the shell, at least part of the connecting surface of the connecting piece and the roll core protrudes out of the inner shrinkage part. According to the battery disclosed by the invention, the connecting piece can play an effective limiting role on the roll core, so that the inward shrinkage part does not directly play a limiting role on the roll core, further the depth of the inward shrinkage part protruding out of the mounting cavity can be shortened, the stretching degree of the shell is reduced, the thickness of a surface coating of the shell is ensured, and the performance of the battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery structure, in particular to a battery and an electric device. BACKGROUND

[0002] Batteries are widely used in energy storage systems, vehicles, consumer electronics and other fields. Batteries mainly include a shell, a cover plate and a winding core.

[0003] In the related art, the shell of the battery is mostly formed with a rolling groove protruding into the internal space of the shell through a rolling groove process. In order to ensure that the rolling groove can limit the winding core, the length of the rolling groove protruding into the internal space of the shell is relatively long, which causes the shell to be stretched to a large extent, so that the surface plating layer of the shell is relatively thin, thereby affecting the performance of the battery. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide a battery and an electric device, which can improve the technical problem that the shell is stretched to a large extent, so that the surface plating layer of the shell is relatively thin, thereby affecting the performance of the battery.

[0005] In a first aspect, embodiments of the present application provide a battery, comprising:

[0006] a shell formed with a mounting cavity, the shell being formed with a retracted portion protruding into the mounting cavity;

[0007] a winding core arranged in the mounting cavity, the winding core being located between the retracted portion and an inner bottom wall of the shell;

[0008] a connecting piece, part of the connecting piece being arranged between the retracted portion and the winding core, the connecting piece abutting against a side of the winding core away from the inner bottom wall of the shell;

[0009] In the radial direction of the shell, a connecting surface of the connecting piece and the winding core at least partially protrudes from the retracted portion.

[0010] In an embodiment, the connecting piece extends along a side of the winding core away from the inner bottom wall of the shell.

[0011] In an embodiment, a second clamping groove is formed on a side of the connecting piece facing the retracted portion, and the retracted portion is clamped in the second clamping groove.

[0012] In an embodiment, the retracted portion is in contact with the groove wall of the second clamping groove.

[0013] In an embodiment, in the radial direction of the shell, the ratio of the length of the retracted portion to the thickness of the shell is a, and 2≤a≤10.

[0014] In an embodiment, the battery further comprises a cover plate, the connecting member is connected to the cover plate, and the connecting member is used to support the cover plate.

[0015] The connecting member protrudes from the inner recess along a radial direction of the shell.

[0016] In an embodiment, the connecting member seals the cover plate and the shell.

[0017] In an embodiment, the connecting member has a supporting surface, and a side of the cover plate facing the winding core abuts against the supporting surface.

[0018] The supporting surface extends to a center of the cover plate along a side of the cover plate facing the winding core.

[0019] In an embodiment, the connecting member is formed with a first clamping groove, and the cover plate is clamped in the first clamping groove.

[0020] In an embodiment, the connecting member comprises a first connecting portion and a second connecting portion connected in sequence, the cover plate is clamped between the first connecting portion and the second connecting portion, and the second connecting portion is located between the cover plate and the winding core.

[0021] The length of the second connecting portion is greater than or equal to the length of the first connecting portion along a radial direction of the shell.

[0022] In an embodiment, the length of the first connecting portion is L1, the length of the second connecting portion is L2, and 1≤L2 / L1≤2 along a radial direction of the shell.

[0023] In an embodiment, the shell comprises a body portion and a pressing portion, the pressing portion is connected to an end of the body portion away from an inner bottom wall of the shell, the pressing portion extends to a center of the mounting cavity, wherein,

[0024] At least part of the connecting member abuts against a side of the pressing portion facing the winding core; and / or,

[0025] A protruding portion is formed on a side of the connecting member away from the cover plate, and the protruding portion is sealingly connected to the pressing portion.

[0026] In an embodiment, a groove is formed on a side of the connecting member away from the cover plate, and a reinforcing rib is arranged in the groove.

[0027] In a second aspect, an embodiment of the present application provides a power-using device comprising the battery described above.

[0028] The embodiment of the present application has the following beneficial effects:

[0029] In the embodiment of the present application, the partial connector is arranged between the inner recess and the winding core, which can limit the connector and improve the installation stability of the connector. The connector is in abutment with the winding core, so that the connector can limit the winding core. That is, the present application limits the connector between the inner recess and the winding core, and makes the connector in abutment with the winding core, so that the connector can limit the winding core, and the connecting surface of the connector can protrude from the inner recess, so that the connector can effectively limit the winding core. The inner recess does not directly limit the winding core, so that the depth of the inner recess protruding into the installation cavity can be shortened, the stretching degree of the shell is reduced, the thickness of the surface plating layer of the shell is ensured, and the performance of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a structural schematic diagram of a battery provided by an embodiment of the present application;

[0032] Figure 2 is a sectional view of the battery provided by an embodiment of the present application;

[0033] Figure 3 is a partial structure enlarged schematic diagram of Figure 2 provided by an embodiment of the present application;

[0034] Figure 4 is a structural schematic diagram of a connector provided by an embodiment of the present application;

[0035] Figure 5 is a partial structure schematic diagram of the connector provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] The following is combined Figures 1 to 5 This application describes the battery and electrical device.

[0038] According to the embodiments of the first aspect of this application, such as Figure 1 , Figure 2 and Figure 3 The battery includes a housing 1, a winding core 2, and a connector 3. The housing 1 has a mounting cavity 11 and an inner recess 12 that protrudes into the mounting cavity 11. The winding core 2 is disposed in the mounting cavity 11 and is located between the inner recess 12 and the inner bottom wall of the housing 1. The connector 3 is partially disposed between the inner recess 12 and the winding core 2 and abuts against the side of the winding core 2 away from the inner bottom wall of the housing. Along the radial direction of the housing 1, the connecting surface of the connector 3 and the winding core 2 protrudes at least partially from the inner recess 12.

[0039] According to the battery embodiment of this application, a portion of the connector 3 is disposed between the recessed portion 12 and the winding core 2, which can limit the position of the connector 3 and improve the installation stability of the connector 3. The connector 3 abuts against the winding core 2, allowing the connector 3 to limit the position of the winding core 2. In other words, by limiting the connector 3 between the recessed portion 12 and the winding core 2 and allowing the connector 3 to abut against the winding core 2, this application enables the connector 3 to limit the position of the winding core 2. Furthermore, the connecting surface between the connector 3 and the winding core 2 can protrude from the recessed portion 12, allowing the connector 3 to effectively limit the position of the winding core 2. This prevents the recessed portion 12 from directly limiting the position of the winding core 2, thereby shortening the depth of the recessed portion 12 protruding into the mounting cavity 11, reducing the stretching of the casing 1, ensuring the thickness of the surface coating of the casing 1, and improving the battery performance.

[0040] It is understandable that connector 3 can be a structural component with a sealing function, meaning that the battery can reuse connector 3 to seal the connection between housing 1 and battery cover 4. Alternatively, the battery can have a separate sealing component to seal the connection between housing 1 and battery cover 4.

[0041] Understandably, in related technologies, to avoid the problem of the shell 1 having too thin a coating due to the excessively deep inward protrusion of the inner recess 12, the depth of the inward protrusion of the inner recess 12 is generally simply shortened. However, shortening the depth of the inward protrusion of the inner recess 12 will result in insufficient limiting amount of the inner recess 12 on the core 2, which can easily lead to unstable installation of the core 2. This application shortens the radial depth of the inner recess 12 while using the connector 3 to limit the core 2. The connecting surface of the connector 3 and the core 2 can protrude from the inner recess 12, which can increase the amount of fiber of the core 2 by the connector 3 without causing excessive stretching of the shell 1. Furthermore, by placing part of the connector 3 between the inner recess 12 and the core 2, the connector 3 is limited, ensuring the stability of the connector 3 and enabling the connector 3 to stably limit the core 2.

[0042] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 The connector 3 extends along the side of the core 2 away from the bottom wall of the housing 1.

[0043] It is understandable that the connector 3 abuts against the core 2, and the connector 3 extends along the surface of the core 2, which can increase the contact area between the connector 3 and the core 2, that is, increase the limiting amount of the connector 3 on the core 2, and ensure the installation stability of the core 2.

[0044] In some examples, the connector 3 extends along the side of the core 2 away from the bottom wall of the housing 1 toward the center of the mounting cavity 11 to increase the limiting effect of the connector 3 on the core 2.

[0045] In some examples, the connector 3 extends along the side of the core 2 away from the inner bottom wall of the housing 1 toward the housing 1 to increase the limiting effect of the connector 3 on the core 2.

[0046] In some embodiments, such as Figure 3 and Figure 5 The connector 3 has a second snap-fit ​​groove 31 on the side facing the inward portion 12, and the inward portion 12 snaps into the second snap-fit ​​groove 31.

[0047] It is understandable that by forming a second snap-fit ​​groove 31 at the connector 3, the inner recess 12 and the connector 3 can be snap-fitted together, which improves the connection stability between the connector 3 and the inner recess 12, and allows the inner recess 12 to play a stable limiting role for the connector 3, thereby improving the installation stability of the connector 3.

[0048] In some embodiments, such as Figure 3 and Figure 5 The inner recess 12 fits against the groove wall of the second snap-fit ​​groove 31.

[0049] It is understandable that the inner recess 12 and the connector 3 fit together, which improves the tightness of the connection between the connector 3 and the inner recess 12, so that the inner recess 12 can effectively limit the connector 3, effectively reduce the waste of the inner protrusion depth of the inner recess 12, and help to shorten the inner protrusion depth of the inner recess 12.

[0050] It is understandable that if the recessed portion 12 does not fit against the groove wall of the second locking groove 31, and there is a gap between the recessed portion 12 and the connector 3, then at least part of the recessed portion 12 cannot function as a limiting connector 3. However, this application sets the recessed portion 12 and the connector 3 to fit together, which increases the effective working length of the recessed portion 12 and helps to shorten the radial length of the recessed portion 12.

[0051] In some embodiments, the ratio of the length of the recess 12 to the thickness of the housing 1 along the radial direction of the housing 1 is a, where 2≤a≤10.

[0052] Understandably, if the ratio of the length of the recessed portion 12 to the thickness of the shell 1 is less than 2, the radial length of the recessed portion 12 is too short, making it difficult for the recessed portion 12 to effectively limit the connection 3, and the installation stability of the connection 3 cannot be guaranteed. If the ratio of the length of the recessed portion 12 to the thickness of the shell 1 is greater than 10, the radial length of the recessed portion 12 is too long, which can easily lead to excessive stretching of the shell 1, resulting in an excessively thin surface coating of the shell 1 and affecting the performance of the battery. Therefore, this application sets the ratio of the length of the recessed portion 12 to the thickness of the shell 1 to be greater than or equal to 2 and less than or equal to 10, so that the recessed portion 12 can effectively limit the connection 3 without causing excessive stretching of the shell 1.

[0053] In some embodiments, such as Figure 2 and Figure 3 The battery also includes a cover plate 4, which is connected to a connector 3, and the connector 3 is used to support the cover plate 4.

[0054] Along the radial direction of the housing 1, the connecting surface of the connector 3 and the cover plate 4 protrudes from the recessed portion 12.

[0055] It is understandable that placing part of the connector 3 between the recessed portion 12 and the core 2 can limit the connector 3 and improve its installation stability. Connecting the connector 3 to the cover plate 4 allows the connector 3 to support the cover plate 4. In other words, by limiting the connector 3 between the recessed portion 12 and the core 2 and connecting it to the cover plate 4, the connector 3 can support the cover plate 4, and the connection surface between the connector 3 and the cover plate 4 can protrude from the recessed portion 12, thus providing effective support for the cover plate 4. This prevents the recessed portion 12 from directly supporting the cover plate 4, thereby shortening the depth of the recessed portion 12 protruding into the mounting cavity 11, reducing the tension on the housing 1, ensuring the thickness of the surface coating of the housing 1, and improving battery performance.

[0056] In some embodiments, the connector 3 seals the connection between the cover plate 4 and the housing 1.

[0057] Understandably, the use of connector 3 to seal the connection between cover plate 4 and housing 1 ensures the battery's airtightness.

[0058] Understandably, by using the seal as the connector 3, the seal is reused, so that the connector 3 can not only support the cover plate 4, limit the winding core 2, but also ensure the sealing performance of the battery.

[0059] In some embodiments, such as Figure 2 and Figure 3 The connector 3 has a support surface 32, and the cover plate 4 abuts against the support surface 32 on the side facing the core 2;

[0060] Along the side of the cover plate 4 facing the core 2, the support surface 32 extends toward the center of the cover plate 4.

[0061] It is understandable that the supporting surface 32 of the connector 3 abuts against the cover plate 4, and the supporting surface 32 extends along the surface of the cover plate 4, which can increase the contact area between the connector 3 and the cover plate 4, that is, increase the supporting surface 32 area of ​​the connector 3 on the cover plate 4, thus ensuring the installation stability of the cover plate 4.

[0062] In some embodiments, such as Figure 3 and Figure 5 The connector 3 has a first snap-fit ​​groove 33, and the cover plate 4 snaps into the first snap-fit ​​groove 33.

[0063] Understandably, by snapping the cover plate 4 into the connector 3, the connection stability between the cover plate 4 and the connector 3 is improved, allowing the connector 3 to provide stable support for the cover plate 4.

[0064] In some embodiments, the connector 3 includes a first connecting portion 36 and a second connecting portion 37 connected in sequence, a cover plate 4 is sandwiched between the first connecting portion 36 and the second connecting portion 37, and the second connecting portion 37 is located between the cover plate 4 and the core 2;

[0065] Along the radial direction of the housing 1, the length of the second connecting part 37 is greater than or equal to the length of the first connecting part 36.

[0066] Understandably, the first connecting part 36 and the second connecting part 37 sandwich the cover plate 4 in the middle to achieve the limiting and fixing of the cover plate 4. At the same time, the length of the second connecting part 37 located between the cover plate 4 and the core 2 is designed to be no less than the length of the first connecting part 36, ensuring that the second connecting part 37 can effectively support the cover plate 4 and effectively prevent the cover plate 4 from collapsing.

[0067] Specifically, along the radial direction of the housing 1, the length of the first connecting part 36 is L1, the length of the second connecting part 37 is L2, and 1≤L2 / L1≤2.

[0068] Understandably, when the ratio of the radial length of the second connecting portion 37 to the radial length of the first connecting portion 36 is less than 1, the length of the second connecting portion 37 is insufficient, making it difficult to effectively support the cover plate 4. This can cause the cover plate 4 to sag during battery sealing. Conversely, when the ratio is greater than 2, the length of the second connecting portion 37 is excessive, potentially causing interference with other battery components and resulting in an oversized battery. Therefore, this application sets the ratio of the radial length of the second connecting portion 37 to the radial length of the first connecting portion 36 to be greater than or equal to 1 and less than or equal to 2. This ensures support for the cover plate 4 while preventing the second connecting portion 37 from becoming too long and interfering with other components, thus avoiding an oversized battery.

[0069] In some embodiments, the housing 1 includes a body portion 13 and a crimping portion 14, the crimping portion 14 being connected to the end of the body portion 13 facing away from the inner bottom wall of the housing 1, and the crimping portion 14 extending toward the center of the mounting cavity 11.

[0070] Specifically, at least part of the connector 3 abuts against the side of the crimping part 14 facing the core 2.

[0071] Understandably, the crimping part 14 can limit the connection part 3, improve the installation stability of the connection part 3, and enable the connection part 3 to stably limit the core 2 and stably support the cover plate 4.

[0072] Specifically, a protrusion 38 is formed on the side of the connector 3 away from the winding core. The protrusion 38 is sealed to the crimping part 14, ensuring the connection and sealing between the connector 3 and the housing 1, thereby ensuring the sealing of the battery.

[0073] For example, during battery sealing, the crimping portion 14 presses the connector 3 so that a protrusion 38 is formed on the side of the connector 3 away from the core, and the crimping portion 14 and the protrusion 38 are sealed together.

[0074] In some embodiments, such as Figure 3 and Figure 4 The connector 3 has a groove 34 on the side away from the cover plate 4, and a reinforcing rib 35 is provided at the groove 34.

[0075] It is understandable that forming a groove 34 at the connector 3 helps to reduce the weight of the connector 3. Meanwhile, providing a reinforcing rib 35 at the groove 34 ensures the structural strength of the connector 3.

[0076] In some examples, the recessed portion 12 is connected to the body portion 13, and the connection between the recessed portion 12 and the body portion 13 is rounded.

[0077] In some examples, the recessed portion 12 is a groove structure, with both the groove opening and the groove bottom having rounded corners.

[0078] According to an embodiment of the second aspect of this application, the electrical device includes the battery described above.

[0079] According to the embodiments of this application, in the electrical equipment, a portion of the connector 3 is disposed between the recessed portion 12 and the core 2, which can limit the position of the connector 3 and improve the installation stability of the connector 3. The connector 3 abuts against the core 2, allowing the connector 3 to limit the position of the core 2. In other words, by limiting the connector 3 between the recessed portion 12 and the core 2 and allowing the connector 3 to abut against the core 2, the connector 3 can limit the position of the core 2, and the connecting surface of the connector 3 and the core 2 can protrude from the recessed portion 12, allowing the connector 3 to effectively limit the position of the core 2. This prevents the recessed portion 12 from directly limiting the position of the core 2, thereby shortening the depth of the recessed portion 12 protruding into the mounting cavity 11, reducing the stretching of the housing 1, ensuring the thickness of the surface coating of the housing 1, improving battery performance, and thus contributing to improved performance of the electrical equipment.

[0080] It should be noted that electrical equipment can be vehicles, aircraft, or household appliances. It is important to note that the above examples are merely illustrative and do not impose any specific limitations on the types of electrical equipment used.

[0081] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery, characterized by, The battery comprises: a shell formed with a mounting cavity, the shell being formed with a retracted portion protruding into the mounting cavity; a winding core arranged in the mounting cavity, the winding core being located between the retracted portion and an inner bottom wall of the shell; a connecting piece, at least part of the connecting piece being arranged between the retracted portion and the winding core, the connecting piece abutting against a side of the winding core away from the inner bottom wall of the shell; along a radial direction of the shell, a connecting surface of the connecting piece and the winding core at least partially protrudes from the retracted portion.

2. The battery of claim 1, wherein, The connecting piece extends along a side of the winding core away from the inner bottom wall of the shell.

3. The battery of claim 1, wherein, A second clamping groove is formed on a side of the connecting piece facing the retracted portion, and the retracted portion is clamped in the second clamping groove.

4. The battery of claim 3, wherein, The retracted portion is in contact with a groove wall of the second clamping groove.

5. The battery according to any one of claims 1 to 4, characterized in that, Along the radial direction of the shell, a ratio of a length of the retracted portion to a thickness of the shell is a, where 2≤a≤10.

6. The battery according to any one of claims 1 to 4, characterized in that, The battery further comprises a cover plate connected to the connecting piece, and the connecting piece is used to support the cover plate. Along the radial direction of the shell, a connecting surface of the connecting piece and the cover plate protrudes from the retracted portion.

7. The battery of claim 6, wherein, The connecting piece is sealingly connected to the cover plate and the shell.

8. The battery of claim 6, wherein, The connecting piece has a supporting surface, and a side of the cover plate facing the winding core abuts against the supporting surface. Along a side of the cover plate facing the winding core, the supporting surface extends towards a center of the cover plate.

9. The battery of claim 6, wherein, The connecting piece is formed with a first clamping groove, and the cover plate is clamped in the first clamping groove.

10. The battery of claim 6, wherein, The connecting piece comprises a first connecting portion and a second connecting portion connected in sequence, the cover plate is clamped between the first connecting portion and the second connecting portion, and the second connecting portion is located between the cover plate and the winding core. Along the radial direction of the shell, a length of the second connecting portion is greater than or equal to a length of the first connecting portion.

11. The battery of claim 10, wherein, Along the radial direction of the shell, a length of the first connecting portion is L1, a length of the second connecting portion is L2, and 1≤L2 / L1≤2.

12. The battery of any one of claims 1 to 4, wherein, The shell comprises a body portion and a pressing portion connected to an end of the body portion away from the inner bottom wall of the shell, the pressing portion extending towards a center of the mounting cavity, wherein at least part of the connecting piece abuts against a side of the pressing portion facing the winding core; and / or a protruding portion is formed on a side of the connecting piece away from the winding core, and the protruding portion is sealingly connected to the pressing portion.

13. The battery of claim 6, wherein, A groove is formed on a side of the connecting piece away from the cover plate, and a reinforcing rib is arranged in the groove.

14. An electrical device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 13.

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