Battery and electric device

Abstract

The present application provides a battery and an electric device. The battery comprises a case (1), a jelly roll (2), and a connecting member (3), wherein a mounting cavity (11) is formed in the case (1); an inwardly recessed portion (12) is formed on the case (1); the inwardly recessed portion (12) protrudes into the mounting cavity (11); the jelly roll (2) is provided in the mounting cavity (11); the jelly roll (2) is located between the inwardly recessed portion (12) and the inner bottom wall of the case (1); part of the connecting member (3) is provided between the inwardly recessed portion (12) and the jelly roll (2); the connecting member (3) abuts against the side of the jelly roll (2) facing away from the inner bottom wall of the case (1); and in the radial direction of the case (1), at least part of the connection surface between the connecting member (3) and the jelly roll (2) protrudes from the inwardly recessed portion (12).

Description

Batteries and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202520282070.4, filed with the Chinese Patent Office on February 20, 2025; the entire contents of the above application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to batteries and electrical devices. Background Technology

[0003] Batteries are widely used in energy storage systems, transportation, and consumer electronics. A battery mainly consists of a casing, cover, and core. Invention Overview

[0004] In related technologies, most battery casings are formed by grooving, creating grooves that protrude into the internal space of the casing. In order to ensure that the grooves can effectively limit the winding core, the length of the grooves protruding into the internal space of the casing is relatively long, resulting in a large degree of stretching of the casing and a thinner coating on the casing surface, which affects the performance of the battery.

[0005] In a first aspect, this application provides a battery comprising:

[0006] A housing having a mounting cavity, the housing having a recessed portion that protrudes into the mounting cavity;

[0007] A core is disposed within the mounting cavity, and the core is located between the recessed portion and the inner bottom wall of the housing;

[0008] A connector, part of which is disposed between the recessed portion and the winding core, abuts against the side of the winding core opposite to the inner bottom wall of the housing;

[0009] Along the radial direction of the housing, the connection surface between the connector and the core protrudes at least partially from the recessed portion.

[0010] Secondly, this application provides an electrical device including the battery described above. Beneficial effects

[0011] The battery provided in this application has a portion of the connector positioned between the recessed portion and the core, which can limit the position of the connector and improve its installation stability. The connector abuts against the core, allowing it to effectively limit the position of the core. In other words, by limiting the connector between the recessed portion and the core and allowing them to abut against each other, the connector effectively limits the position of the core. Furthermore, the connection surface between the connector and the core can protrude from the recessed portion, enabling the connector to effectively limit the position of the core. This prevents the recessed portion from directly limiting the core, thereby shortening the depth of the recessed portion protruding into the mounting cavity, reducing the stretching of the casing, ensuring the thickness of the surface coating of the casing, and improving battery performance. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the battery structure provided in an embodiment of this application;

[0013] Figure 2 is a cross-sectional view of a battery provided in an embodiment of this application;

[0014] Figure 3 is an enlarged schematic diagram of a portion of the structure in Figure 2 provided in an embodiment of this application;

[0015] Figure 4 is a structural schematic diagram of the connector provided in an embodiment of this application;

[0016] Figure 5 is a partial structural schematic diagram of the connector provided in an embodiment of this application. Embodiments of the present invention

[0017] An embodiment of this application discloses a battery, as shown in Figures 1, 2, and 3. The battery includes a housing 1, a core 2, and a connector 3. The housing 1 has a mounting cavity 11 and an inwardly recessed portion 12 that protrudes into the mounting cavity 11. The core 2 is disposed within the mounting cavity 11 and is located between the inwardly recessed portion 12 and the inner bottom wall of the housing 1. The connector 3 is partially disposed between the inwardly recessed portion 12 and the core 2, and the connector 3 abuts against the side of the core 2 opposite to the inner bottom wall of the housing. Along the radial direction of the housing 1, the connecting surface between the connector 3 and the core 2 protrudes at least partially from the inwardly recessed portion 12.

[0018] 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.

[0019] It is understandable that the connector 3 can be a structural component with a sealing function, meaning that the battery can reuse the connector 3 to seal the connection between the housing 1 and the battery cover 4. Alternatively, the battery can have a separate sealing component to seal the connection between the housing 1 and the battery cover 4.

[0020] 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.

[0021] In some embodiments, as shown in Figures 1, 2 and 3, the connector 3 extends along the side of the core 2 away from the inner bottom wall of the housing 1.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] In some embodiments, as shown in Figures 3 and 5, a second snap-fit ​​groove 31 is formed on the side of the connector 3 facing the recessed portion 12, and the recessed portion 12 snaps into the second snap-fit ​​groove 31.

[0026] 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.

[0027] In some embodiments, as shown in Figures 3 and 5, the recessed portion 12 fits against the groove wall of the second snap-fit ​​groove 31.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In some embodiments, as shown in Figures 2 and 3, the battery further includes a cover plate 4, which is connected to a connector 3, and the connector 3 is configured to support the cover plate 4.

[0033] 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.

[0034] 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.

[0035] In some embodiments, the connector 3 seals the connection between the cover plate 4 and the housing 1.

[0036] Understandably, the use of connector 3 to seal the connection between cover plate 4 and housing 1 ensures the battery's airtightness.

[0037] 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.

[0038] In some embodiments, as shown in Figures 2 and 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;

[0039] 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.

[0040] 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.

[0041] In some embodiments, as shown in Figures 3 and 5, the connector 3 has a first snap-fit ​​groove 33, and the cover plate 4 snaps into the first snap-fit ​​groove 33.

[0042] 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.

[0043] 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;

[0044] 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.

[0045] 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.

[0046] In some embodiments, along the radial direction of the housing 1, the length of the first connecting portion 36 is L1, the length of the second connecting portion 37 is L2, and 1≤L2 / L1≤2.

[0047] 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.

[0048] 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.

[0049] In some embodiments, at least a portion of the connector 3 abuts against the side of the crimping portion 14 facing the core 2.

[0050] 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.

[0051] In some embodiments, 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.

[0052] 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.

[0053] In some embodiments, as shown in Figures 3 and 4, a groove 34 is formed on the side of the connector 3 away from the cover plate 4, and a reinforcing rib 35 is provided at the groove 34.

[0054] 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.

[0055] In some embodiments, 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.

[0056] In some embodiments, the recessed portion 12 is a grooving structure, with both the opening and bottom of the grooving having rounded corners.

[0057] Embodiments of this application also disclose an electrical device, including the battery described above.

[0058] 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.

[0059] 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.

Claims

1. A battery, comprising: A housing having a mounting cavity, the housing having a recessed portion that protrudes into the mounting cavity; A core is disposed within the mounting cavity, and the core is located between the recessed portion and the inner bottom wall of the housing; A connector, part of which is disposed between the recessed portion and the winding core, abuts against the side of the winding core opposite to the inner bottom wall of the housing; Along the radial direction of the housing, the connection surface between the connector and the core protrudes at least partially from the recessed portion.

2. The battery according to claim 1, wherein, The connector extends along the side of the core away from the bottom wall of the housing.

3. The battery according to claim 1, wherein, The connector has a second snap-fit ​​groove on the side facing the inward portion, and the inward portion snaps into the second snap-fit ​​groove.

4. The battery according to claim 3, wherein, The recessed portion fits into the groove wall of the second snap-fit ​​groove.

5. The battery according to any one of claims 1 to 4, wherein, Along the radial direction of the housing, the ratio of the length of the recess to the thickness of the housing is a, where 2≤a≤10.

6. The battery according to any one of claims 1 to 4, wherein, The battery also includes a cover plate, which is connected to the connector and the connector is configured to support the cover plate; Along the radial direction of the housing, the connection surface between the connector and the cover plate protrudes from the recessed portion.

7. The battery according to claim 6, wherein, The connector provides a sealed connection between the cover plate and the housing.

8. The battery according to claim 6, wherein, The connector has a support surface, and the cover plate abuts against the support surface on the side facing the core; Along the side of the cover plate toward the core, the support extends toward the center of the cover plate.

9. The battery according to claim 6, wherein, The connector has a first snap-fit ​​groove, and the cover plate snaps into the first snap-fit ​​groove.

10. The battery according to claim 6, wherein, The connector includes a first connecting part and a second connecting part connected in sequence, the cover plate is sandwiched between the first connecting part and the second connecting part, and the second connecting part is located between the cover plate and the core; Wherein, along the radial direction of the housing, the length of the second connecting portion is greater than or equal to the length of the first connecting portion.

11. The battery according to claim 10, wherein, Along the radial direction of the housing, the length of the first connecting part is L1, the length of the second connecting part is L2, and 1≤L2 / L1≤2.

12. The battery according to any one of claims 1 to 4, wherein, The housing includes a body portion and a crimping portion, the crimping portion being connected to the end of the body portion opposite to the inner bottom wall of the housing, and the crimping portion extending towards the center of the mounting cavity, wherein... At least a portion of the connector abuts against the crimped portion on the side facing the winding core; and / or, The connector has a protrusion on the side opposite to the winding core, and the protrusion is sealed to the crimping part.

13. The battery according to claim 6, wherein, The connector has a groove on the side opposite to the cover plate, and a reinforcing rib is provided in the groove.

14. An electrical appliance comprising a battery as described in any one of claims 1 to 13.

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