Battery and power consuming device

Abstract

The application relates to the technical field of batteries, and particularly discloses a battery and a power consumption device, the battery comprising a shell, a battery cell and a buffer structure; the battery cell is arranged in the interior of the shell and has a gap between the battery cell and the inner wall of the shell; the buffer structure is arranged between the shell and the battery cell and fills at least part of the gap; in a first direction, the total thickness of the battery cell is d mm, the elastic modulus of the buffer structure is AMPa, and the following condition is met: 10<=d / A<=200, mm / MPa. In the above scheme, by limiting the ratio of the total thickness of the battery cell to the elastic modulus of the buffer structure, the buffer structure has appropriate deformation capacity and resilience when being impacted, can effectively absorb vibration energy, and will not excessively extrude the battery cell, so that the battery cell displacement or structural failure is avoided, the overall buffer performance and structural stability are optimized, and the battery cell is prevented from impacting the shell when the battery shakes, so that the battery cell or the shell is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and specifically proposes a battery and an electrical device. Background Technology

[0002] Currently, some energy storage batteries are prone to shaking and bumping during use. In this case, the battery cells inside the battery may collide with the casing, resulting in damage to the cells or the casing. Utility Model Content

[0003] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions: In a first aspect, this application proposes a battery comprising a casing, a battery cell, and a buffer structure; the battery cell is disposed inside the casing and has a gap between it and the inner wall of the casing; the buffer structure is disposed between the casing and the battery cell and fills at least part of the gap; along a first direction, the total thickness of the battery cell is d mm, and the elastic modulus of the buffer structure is AMPa, satisfying: 10 ≤ d / A ≤ 200, in mm / MPa.

[0004] Secondly, this application proposes an electrical device that includes the battery of the first aspect.

[0005] The technical solution proposed in this application has at least the following technical effects: In the above scheme, by limiting the ratio range of the total thickness of the battery cell to the elastic modulus of the buffer structure, the buffer structure has appropriate deformation capacity and resilience when subjected to impact. This can effectively absorb vibration energy without excessively squeezing the battery cell, which could lead to cell displacement or structural failure. This optimizes the overall buffer performance and structural stability, and prevents the battery cell from hitting the casing when the battery shakes, thus avoiding damage to the battery cell or casing. Attached Figure Description

[0006] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.

[0007] Specifically, the annotations for the accompanying drawings are as follows: Figure 1 This is a schematic diagram of the battery structure described in some embodiments of this application; Figure 2 This is a schematic diagram of the buffer structure described in some embodiments of this application; Figure 3This is a schematic diagram of the isometric structure of the battery cell described in some embodiments of this application; Figure 4 This is a top view schematic diagram of the battery cell described in some embodiments of this application.

[0008] Specifically, the annotations for the figure marks in the instruction manual are as follows: 10. Casing; 20. Battery cell; 201. Bending section; 202. Straight section; 203. Electrode; 30. Buffer structure; 301. Insulation layer; 302. Buffer airbag; 40. Cover plate. Detailed Implementation

[0009] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It should be understood that the content mentioned below represents only some embodiments of this application, and not all embodiments are listed exhaustively. Therefore, other embodiments that can be obtained based on the following embodiments without any inventive effort fall within the protection scope of this application.

[0010] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.

[0011] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.

[0012] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.

[0013] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0014] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0015] Firstly, referring to Figures 1 to 3 This application proposes a battery comprising a housing 10, a battery cell 20, and a buffer structure 30; the battery cell 20 is disposed inside the housing 10 and has a gap between it and the inner wall of the housing 10; the buffer structure 30 is disposed between the housing 10 and the battery cell 20 and fills at least part of the gap; along a first direction, the total thickness of the battery cell 20 is d mm, and the elastic modulus of the buffer structure 30 is AMPa, satisfying: 10 ≤ d / A ≤ 200, in mm / MPa.

[0016] In this embodiment, by limiting the ratio range of the total thickness (dmm) of the battery cell 20 to the elastic modulus (AMPa) of the buffer structure 30, the buffer structure 30 has appropriate deformation capacity and resilience when subjected to impact. This effectively absorbs vibration energy without excessively compressing the battery cell 20, which could lead to displacement or structural failure. This optimizes the overall buffering performance and structural stability, preventing the battery cell 20 from impacting the casing 10 when the battery shakes, thus avoiding damage to the battery cell 20 or the casing 10.

[0017] Furthermore, d / A can take any one of the following values ​​or a range between any two of them: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, and 200, with the unit being mm / MPa.

[0018] It should be understood that the battery also includes other structures, such as a cover plate 40 that covers the opening of the housing 10, and other structures are not limited herein.

[0019] In some embodiments, the buffer structure 30 covers 10% to 50% of the surface of the cell 20.

[0020] In this embodiment, the buffer structure 30 is designed to provide adequate protection in critical areas (such as impact-prone surfaces) to prevent the battery cell 20 from directly impacting the housing 10 due to partial exposure; at the same time, it avoids excessive wrapping that could affect heat dissipation or increase unnecessary weight / cost, thus achieving a balance between protection and practicality.

[0021] Furthermore, the coverage ratio of the buffer structure 30 on the surface of the cell 20 can be any one of 10%, 20%, 30%, 40% and 50% or within any two of these values.

[0022] In some embodiments, the total thickness of the battery cell 20 ranges from 50mm ≤ dmm ≤ 100mm, and / or the elastic modulus of the buffer structure 30 ranges from 0.5MPa ≤ AMPa ≤ 5MPa.

[0023] Specifically, dmm can be any one of 50mm, 60mm, 70mm, 80mm, 90mm and 100mm or within any two of these values; AMPa can be any one of 0.5MPa, 1MPa, 2MPa, 3MPa, 4MPa and 5MPa or within any two of these values.

[0024] In some embodiments, refer to Figure 2 The buffer structure 30 includes an insulating layer 301, which is wrapped around the surface of the battery cell 20.

[0025] In this embodiment, the buffer structure 30 provides mechanical buffering while also serving an electrical insulation function, preventing short circuits between the battery cell 20 and the casing 10 or other components, thereby improving battery safety.

[0026] In some embodiments, refer to Figure 2 The buffer structure 30 also includes a plurality of buffer airbags 302 disposed on the insulating layer 301, and the interior of the buffer airbags 302 is a cavity structure.

[0027] In this embodiment, the buffer airbag 302 has excellent energy absorption capacity. The cavity can be compressed and deformed when under pressure, effectively attenuating the impact force. The distribution of multiple buffer airbags 302 can achieve local stress dispersion and avoid damage caused by concentrated force.

[0028] Specifically, the battery cell 20 has an adjacent first side and a second side, the area of ​​the first side being smaller than the area of ​​the second side; in some embodiments, the buffer structure 30 can wrap around the battery cell 20 and cover the first side and the second side; further, the buffer structure 30 can be provided with a buffer airbag 302 in the area corresponding to the first side and / or the second side.

[0029] In some embodiments, refer to Figure 2 The buffer airbag 302 is circular in shape and has a diameter of 2mm to 10mm.

[0030] In this embodiment, the buffering efficiency and space utilization of the buffer airbag 302 are optimized through geometric parameters. For example, it is set to be circular; specifically, the diameter of the buffer airbag 302 can be any one of 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm and 10mm or within any two of these values.

[0031] Of course, the airbag 302 can also be in other shapes, such as oval or strip, which are all acceptable implementations.

[0032] In some embodiments, the area of ​​the cushioning airbag 302 is 4750 mm². 2 Up to 350000mm 2 And / or, the area of ​​cell 20 is 47500 mm² 2 Up to 700,000 mm 2 .

[0033] In this embodiment, the area of ​​the buffer airbag 302 can be 4750 mm². 2 5000mm 2 10000mm 2 50000mm 2 100000mm 2 150000mm 2 200000mm 2 250000mm 2 300000mm 2 and 350000mm 2 Any one of these values ​​or a range between any two of these values; the area of ​​cell 20 can be 47500 mm². 2 50000mm 2 100000mm 2 200000mm 2 300000mm 2 400000mm 2 500000mm 2 600000mm 2 and 700000mm 2 Any one of these values ​​or a range between any two of these values.

[0034] In some embodiments, the buffer structure 30 includes an elastic element connected to the inner wall of the housing 10.

[0035] In this embodiment, additional buffering is provided from the housing 10 side to form a "double-sided buffer", that is, the buffer structure 30 connected to one side of the battery cell 20, plus the buffer structure 30 connected to one side of the housing 10, thereby further restricting the displacement of the battery cell 20, especially enhancing the overall impact resistance during violent shaking.

[0036] Of course, either of the two-sided buffers mentioned above can be selected.

[0037] In some embodiments, the elastic element is a rubber layer attached to the inner wall of the housing 10.

[0038] Understandably, the elastic element can also be made of other materials, such as foam or other foamed materials, which are all desirable implementation methods.

[0039] In some embodiments, refer to Figure 3 and Figure 4 The battery cell 20 includes at least two cells, and the buffer structure 30 includes an adhesive layer that bonds two adjacent battery cells 20 together.

[0040] In this embodiment, multiple battery cells 20 are fixed into a single module to reduce the relative movement between the battery cells 20, avoid internal friction, collision or loose connection, and improve the overall structural rigidity and battery cycle life.

[0041] It should be noted that, referring to Figure 3 and Figure 4 The battery cell 20 has a tab 203 led out from one end in the height direction.

[0042] In some embodiments, refer to Figure 3 and Figure 4 The battery cell 20 includes a bending section 201, and a buffer structure 30 is disposed in the bending section 201.

[0043] In this embodiment, the bending section 201 is a structurally weak area, which is prone to stress concentration during vibration. The targeted arrangement of the buffer structure 30 can strengthen the support and protection of this area, preventing the bending section 201 from being damaged or internally short-circuited due to impact.

[0044] In some embodiments, refer to Figure 3 Along the height direction of the cell 20, a buffer structure 30 is provided at the middle position and / or at both ends of the bending section 201.

[0045] Specifically, along the height direction of the battery cell 20, the buffer structure 30 can be set at the middle position and both ends of the bending section 201 simultaneously, thereby providing comprehensive protection for the bending section 201.

[0046] In some embodiments, the minimum thickness of the buffer structure 30 is d1mm, the size of the gap is d2mm, and satisfies 0.04≤d1 / d2≤110, and / or 0.08mm≤d1mm≤11mm, and / or 0.1mm≤d2mm≤2mm.

[0047] In this embodiment, d1mm cannot be too small to ensure that the buffer structure 30 has sufficient thickness to play a buffering role. At the same time, d2mm cannot be too large to avoid excessive gaps that would cause excessive shaking of the battery cell 20. The ratio control of the two can ensure effective buffer filling and leave reasonable deformation space.

[0048] Furthermore, d1 / d2 can take any one of the values ​​of 0.04, 0.1, 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, and 110, or fall within the range of any two of these values; d1mm can take any one of the values ​​of 0.08mm, 0.1mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, and 11mm, or fall within the range of any two of these values; d2mm can take any one of the values ​​of 0.1mm, 0.2mm, 0.5mm, 1mm, 1.5mm, and 2mm, or fall within the range of any two of these values.

[0049] In some embodiments, refer to Figure 3 and Figure 4 The battery cell 20 also includes a straight section 202. The thickness of the buffer structure 30 in the bending section 201 of the battery cell 20 is d3mm, and the thickness of the buffer structure 30 in the straight section 202 is d4mm. The difference between (d3 and d4)mm is 0.42mm to 3mm, and / or 0.08mm≤d3mm≤8mm, and / or 0.5mm≤d4mm≤11mm.

[0050] In this embodiment, the design is differentiated according to the difference in structural stress. That is, the bent section 201 is more easily damaged, so the thickness of the buffer structure 30 is increased; the straight section 202 is subjected to less stress, so it can be thinned to save space, thereby realizing "buffering on demand", optimizing material use and spatial layout. In addition, the gap between the bent section 201 and the shell 10 is large, so the thickness of the buffer structure 30 can be increased at this point.

[0051] Furthermore, (d3-d4)mm can take any one of 0.42mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm and 3mm or a range between any two of these values; d3mm can take any one of 0.08mm, 0.1mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm and 8mm or a range between any two of these values; d4 can take any one of 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm and 11mm or a range between any two of these values.

[0052] Secondly, this application proposes an electrical device that includes the battery of the first aspect.

[0053] In this embodiment, the electrical device of the second aspect includes the battery of the first aspect, and therefore the electrical device of the second aspect includes all the technical effects of the battery of the first aspect.

[0054] In particular, the term "and / or" in this application should be understood as follows: In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0055] In the second case, the term "and / or" between the last two of three or more subjects means including at least one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject; Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0056] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.

Claims

1. A battery, characterized in that, include: Shell (10); The battery cell (20) is disposed inside the housing (10) and has a gap between it and the inner wall of the housing (10); A buffer structure (30) is provided between the housing (10) and the battery cell (20) and fills at least part of the gap; Along the first direction, the total thickness of the battery cell (20) is d mm, and the elastic modulus of the buffer structure (30) is AMPa, satisfying: 10≤d / A≤200, with units of mm / MPa.

2. The battery according to claim 1, characterized in that, The buffer structure (30) covers 10% to 50% of the surface of the cell (20).

3. The battery according to claim 1, characterized in that, The total thickness of the battery cell (20) is in the range of 50mm≤dmm≤100mm, and / or the elastic modulus of the buffer structure (30) is in the range of 0.5MPa≤AMPa≤5MPa.

4. The battery according to claim 1, characterized in that, The buffer structure (30) includes an insulating layer (301) that wraps around the surface of the battery cell (20).

5. The battery according to claim 4, characterized in that, The buffer structure (30) also includes a plurality of buffer airbags (302) disposed on the insulating layer (301), and the buffer airbags (302) have a hollow structure inside.

6. The battery according to claim 5, characterized in that, The buffer airbag (302) is circular in shape, and the diameter of the buffer airbag (302) is 2mm to 10mm.

7. The battery according to claim 5, characterized in that, The area of ​​the cushioning airbag (302) is 4750 mm². 2 Up to 350000mm 2 And / or, the area of ​​the battery cell (20) is 47500 mm². 2 Up to 700,000 mm 2 .

8. The battery according to claim 1, characterized in that, The buffer structure (30) includes an elastic element connected to the inner wall of the housing (10).

9. The battery according to claim 8, characterized in that, The elastic element is a rubber layer attached to the inner wall of the housing (10).

10. The battery according to claim 1, characterized in that, The battery cell (20) includes at least two cells, and the buffer structure (30) includes an adhesive layer that bonds two adjacent battery cells (20).

11. The battery according to claim 10, characterized in that, The battery cell (20) includes a bent section (201), and the buffer structure (30) is disposed on the bent section (201).

12. The battery according to claim 11, characterized in that, Along the height direction of the battery cell (20), the buffer structure (30) is provided at the middle position and / or at both ends of the bent section (201).

13. The battery according to claim 1, characterized in that, The minimum thickness of the buffer structure (30) is d1mm, the size of the gap is d2mm, and satisfies 0.04≤d1 / d2≤110, and / or 0.08mm≤d1mm≤11mm, and / or 0.1mm≤d2mm≤2mm.

14. The battery according to claim 11, characterized in that, The battery cell (20) also includes a straight section (202), the thickness of the buffer structure (30) in the bent section (201) of the battery cell (20) is d3mm, the thickness of the buffer structure (30) in the straight section (202) is d4mm, the difference between (d3 and d4)mm is 0.42mm to 3mm, and / or 0.08mm≤d3mm≤8mm, and / or 0.5mm≤d4mm≤11mm.

15. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 14.

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