Battery cell packaging structure and cylindrical battery

Abstract

The utility model discloses a battery cell packaging structure which comprises a battery cell, a conductive shell, a conductive support and a sealing sleeve, a containing groove is formed in the conductive shell, and the battery cell is arranged in the containing groove; the conductive support and the sealing sleeve are arranged in the conductive shell and located above or below the containing groove. The positive electrode and the negative electrode of the battery cell are respectively connected with the conductive bracket and the conductive shell; the sealing sleeve is arranged between the conductive support and the conductive shell, and the conductive shell, the sealing sleeve and the conductive support are recessed inwards in horizontal corresponding positions to form limiting structures which are mutually limited. Compared with the prior art, the concave limiting structure is formed in the conductive shell, the sealing sleeve and the conductive bracket rolling groove to package the battery cell of the cylindrical battery, so that the sealing performance of the battery cell can be improved, and electrolyte leakage is prevented; besides, the conductive bracket, the sealing sleeve and the battery cell can be made into an integrated structure in advance, and pier sealing forming is performed after a slot rolling process, so that the assembly process of the battery can be simplified, and the assembly is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, and specifically relates to a cell packaging structure and a cylindrical battery. Background Technology

[0002] Currently, cylindrical batteries are typically encapsulated by rolling grooves in a metal casing and plastic sealant, and then pressed and sealed. This method is not convenient for battery assembly.

[0003] In addition, in this packaging method, the battery cell is sealed with a plastic sealant. The conductive electrode of the battery cell needs to pass through the plastic sealant to connect with the control circuit board above. This can cause the plastic sealant to not seal properly, posing a risk of electrolyte leakage. At the same time, the plastic sealant also has the problem of poor structural stability, resulting in poor stability of the battery cell packaging structure. Utility Model Content

[0004] To address the aforementioned problems, the primary objective of this invention is to provide a cylindrical battery that offers the advantage of easy assembly.

[0005] Another objective of this invention is to provide a cell packaging structure with good sealing performance, which can prevent electrolyte leakage and improve battery safety when applied to batteries.

[0006] Another objective of this invention is to provide a cell packaging structure with strong structural stability, which can improve the battery's lifespan when applied to batteries.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] This utility model provides a battery cell packaging structure, including:

[0009] Battery cell;

[0010] A conductive housing that can be electrically connected to the battery's control circuit board;

[0011] A conductive bracket capable of being electrically connected to the battery's control circuit board;

[0012] And the sealing sleeve;

[0013] The conductive housing has a receiving groove, and the battery cell is disposed in the receiving groove; the conductive support and the sealing sleeve are both disposed in the conductive housing and are located above or below the receiving groove; the positive and negative terminals of the battery cell are respectively connected to the conductive support and the conductive housing; the sealing sleeve is disposed between the conductive support and the conductive housing, and the conductive housing, the sealing sleeve, and the conductive support are all recessed inward at corresponding horizontal positions to form a mutually limiting structure.

[0014] Furthermore, the limiting structure includes a first limiting protrusion, a first limiting groove, a second limiting protrusion, and a second limiting groove corresponding to horizontal positions. The first limiting protrusion is disposed on the inner wall of the conductive shell, the first limiting groove is disposed on the outer wall of the sealing sleeve, the second limiting protrusion is disposed on the inner wall of the sealing sleeve, and the second limiting groove is disposed on the outer wall of the conductive bracket. The first limiting protrusion is engaged in the first limiting groove, and the second limiting protrusion is disposed in the second limiting groove.

[0015] Furthermore, the battery cell includes a battery cell body, on which a positive electrode plate and a negative electrode plate are disposed. The positive electrode plate is connected to a conductive support, and the negative electrode plate is connected to a conductive shell.

[0016] Furthermore, the sealing sleeve has a ring-shaped structure with an "L"-shaped support foot at its bottom, and the conductive bracket is supported on the support foot.

[0017] Furthermore, the conductive housing is made of a metal material with conductive properties.

[0018] Furthermore, the sealing sleeve is made of a flexible plastic material.

[0019] Furthermore, the conductive support is provided with a vertically penetrating vent hole, and a sealing filler is provided inside the vent hole.

[0020] Furthermore, the conductive support is provided with an exhaust hole that runs vertically through it, and a sealing baffle is provided at the bottom of the conductive support. The edge of the sealing baffle is pressed between the conductive support and the sealing sleeve, and the sealing baffle is electrically connected to the conductive support and the positive electrode of the battery cell.

[0021] Furthermore, the conductive support is provided with an exhaust hole that runs vertically through it, and a sealing seat is provided between the conductive support and the sealing sleeve. The sealing seat is a barrel-shaped structure with an open top. The conductive support is disposed inside the sealing seat, and the sealing baffle is electrically connected to the conductive support and the positive electrode of the battery cell.

[0022] Furthermore, the sealing baffle and sealing seat are both made of conductive metal materials. By setting relatively weak and easily broken parts, the easily broken parts will break under high pressure, thereby facilitating the vent hole to release pressure.

[0023] This utility model provides a cylindrical battery, comprising: a plastic body, a control circuit board, and a positive electrode post. The plastic body is mounted on a conductive shell. The control circuit board and the positive electrode post are both fixed on the plastic body. The upper end of the positive electrode post is exposed in the plastic body, and the lower end passes through the plastic body and is connected to the control circuit board. The control circuit board is electrically connected to the conductive shell and the conductive support. The lower end of the conductive shell is also provided with a negative electrode portion, and the negative electrode plate is electrically connected to the negative electrode portion.

[0024] Furthermore, the control circuit board is also connected to an electrical interface exposed in the conductive housing.

[0025] The advantages of this invention are as follows: Compared with the prior art, by forming a concave limiting structure in the conductive shell, sealing sleeve, and conductive support grooves to encapsulate the cylindrical battery cell, it can not only improve the sealing performance of the cell and prevent electrolyte leakage, but also improve the structural stability of the cell encapsulation structure. In addition, the conductive support and sealing sleeve can be pre-made into an integral structure with the cell, placed in the conductive shell, and then subjected to the grooving process. After the control circuit board and electrical interface are installed, the battery is then sealed, which simplifies the battery assembly process and makes assembly more convenient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a cylindrical battery.

[0027] Figure 2 This is a cross-sectional view of a cylindrical battery.

[0028] Figure 3 This is a cross-sectional view of the cell packaging structure according to Embodiment 1.

[0029] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0030] Figure 5 This is a cross-sectional view of the cell packaging structure in Embodiment 2.

[0031] Figure 6 This is a cross-sectional view of the cell packaging structure of Embodiment 3.

[0032] Figure 7 This is a cross-sectional view of the cell packaging structure of Embodiment 4.

[0033] Figure 8 This is a structural diagram of the conductive support, sealing sleeve, sealing filler, sealing baffle, and sealing seat.

[0034] In the diagram: 1. Plastic body; 2. Control circuit board; 3. Positive electrode post; 4. Cell packaging structure; 41. Cell; 411. Cell body; 412. Positive electrode plate; 413. Negative electrode plate; 42. Conductive shell; 421. Receiving groove; 43. Conductive support; 44. Sealing sleeve; 441. Support foot; 45. Limiting structure; 451. First limiting protrusion; 452. First limiting groove; 453. Second limiting protrusion; 454. Second limiting groove; 46. Vent hole; 47. Sealing filler; 48. Sealing baffle; 49. Sealing seat; 5. Negative electrode part; 6. Electrical interface. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] To achieve the above objectives, the technical solution of this utility model is as follows:

[0037] See Figure 1 As shown, this embodiment provides a cylindrical battery, including: a plastic body 1, a control circuit board 2, a positive electrode post 3, and a cell packaging structure 4. The cell packaging structure 4 includes a cell 41, a conductive shell 42, a conductive bracket 43, and a sealing sleeve 44. The plastic body 1 is mounted on the conductive shell 42. The control circuit board 2 and the positive electrode post 3 are both fixed on the plastic body 1. The upper end of the positive electrode post 3 is exposed in the plastic body 1, and the lower end passes through the plastic body 1 and is connected to the control circuit board 2. The control circuit board 2 is electrically connected to the conductive shell 42 and the conductive bracket 43. The lower end of the conductive shell 42 is also provided with a negative electrode part 5. The negative electrode of the cell 41 is electrically connected to the negative electrode part 5.

[0038] See Figure 2-7 The conductive housing 42 is provided with a receiving groove 421, and the battery cell 41 is disposed in the receiving groove 421. The conductive support 43 and the sealing sleeve 44 are both disposed in the conductive housing 42 and located above the receiving groove 421. The positive and negative poles of the battery cell 41 are respectively connected to the conductive support 43 and the conductive housing 42. The sealing sleeve 44 is disposed between the conductive support 43 and the conductive housing 42, and the conductive housing 42, the sealing sleeve 44 and the conductive support 43 are all recessed inward at corresponding horizontal positions to form a mutually limiting structure 45.

[0039] In this embodiment, the control circuit board 2 is also connected to an electrical interface 6 exposed in the conductive housing 42. When the cylindrical battery is in use, the positive terminal 3 serves as the positive terminal of the battery, and the negative terminal 5 serves as the negative terminal of the battery to supply power to the external load. The electrical interface 6 can be a TYPE-C interface or a USB interface to charge the battery.

[0040] In this embodiment, the conductive support 43 is made of a conductive metal material, which enables electrical connection between the positive electrode of the battery cell 41 and the battery control circuit board 2, and also provides support for the encapsulation structure. The conductive shell 42 is made of metal and serves as the outer casing of the battery, enabling electrical connection between the negative electrode of the battery cell 41 and the battery control circuit board 2, thereby cooperating with the conductive support 43 to achieve circuit conduction of the battery cell 41. The sealing sleeve 44 is made of elastic plastic material and is tightly fitted with the conductive support 43 and the conductive shell 42, achieving a seal between the conductive support 43 and the conductive shell 42, thus sealing the battery cell 41 in the mounting groove. By forming an inwardly recessed limiting structure 45 by rolling grooves in the conductive shell 42, the sealing sleeve 44, and the conductive support 43, the structure of the sealing sleeve 44 and the conductive support 43 is limited, which not only improves the sealing performance of the battery cell 41 and prevents electrolyte leakage, but also improves the structural stability of the battery cell encapsulation structure 4. In addition, the conductive bracket 43 and the sealing sleeve 44 can be pre-made into an integrated structure with the battery cell 41, placed in the conductive housing 42 and then subjected to the rolling process, and then the control circuit board 2 and the electrical interface 6 are installed and then sealed. This simplifies the battery assembly process and makes assembly more convenient.

[0041] Further, see Figure 4 The limiting structure 45 includes a first limiting protrusion 451, a first limiting groove 452, a second limiting protrusion 453, and a second limiting groove 454, all corresponding to a horizontal position. The first limiting protrusion 451 is disposed on the inner wall of the conductive housing 42, the first limiting groove 452 is disposed on the outer wall of the sealing sleeve 44, the second limiting protrusion 453 is disposed on the inner wall of the sealing sleeve 44, and the second limiting groove 454 is disposed on the outer wall of the conductive support 43. The first limiting protrusion 451 is engaged within the first limiting groove 452, and the second limiting protrusion 453 is disposed within the second limiting groove 454. Limitation is achieved through the engagement between the first limiting protrusion 451, the first limiting groove 452, the second limiting protrusion 453, and the second limiting groove 454.

[0042] Furthermore, the battery cell 41 includes a battery cell body 411, on which a positive electrode plate 412 and a negative electrode plate 413 are disposed. The positive electrode plate 412 serves as the positive electrode of the battery cell and is connected to the conductive support 43; the negative electrode plate 413 serves as the negative electrode of the battery cell and is connected to the negative electrode portion 5 of the conductive housing 42, thereby realizing the circuit connection between the battery cell 41 and the battery control circuit board 2.

[0043] Furthermore, the sealing sleeve 44 has a ring-shaped structure, and its bottom is provided with an "L"-shaped support foot 441, on which the conductive bracket 43 is supported.

[0044] In this embodiment, the cell packaging structure 4 can be implemented in multiple ways:

[0045] See Figure 3 In embodiment 1, only a conductive housing 42, a conductive support 43, and a sealing sleeve 44 are provided, and the battery cell is sealed by making grooves on the three components.

[0046] See Figure 5 In implementation method 2, the conductive support 43 is provided with a vertically penetrating vent 46, and a sealing filler 47 is provided inside the vent 46. Under normal circumstances, the sealing filler 47 can seal the vent 46. When the pressure inside the cell 41 is high, the sealing filler 47 can be pushed out of the vent 46, thereby relieving pressure on the cell 41 through the vent 46 and preventing the battery from exploding.

[0047] See Figure 6 In implementation method 3, the conductive support 43 is provided with a vertically penetrating vent 46, and a sealing baffle 48 is provided at the bottom of the conductive support 43. The edge of the sealing baffle 48 is pressed between the conductive support 43 and the sealing sleeve 44, and the sealing baffle 48 is electrically connected to the conductive support 43 and the positive electrode of the battery cell 41. The positive electrode of the battery cell 41 is electrically connected to the conductive support 43 through the sealing baffle 48, realizing circuit conduction. Under normal circumstances, the sealing baffle 48 can seal the vent 46. When the pressure inside the battery cell 41 is high, it can break the sealing baffle 48, thereby allowing pressure to be released from the battery cell 41 through the vent 46, preventing the battery from exploding.

[0048] See Figure 7 In implementation method 4, the conductive support 43 is provided with a vertically penetrating vent 46. A sealing seat 49 is provided between the conductive support 43 and the sealing sleeve 44. The sealing seat 49 is a barrel-shaped structure with an open top. The conductive support 43 is disposed inside the sealing seat 49, and the sealing seat 49 is electrically connected to the conductive support 43 and the positive electrode of the battery cell 41. The positive electrode of the battery cell 41 is electrically connected to the conductive support 43 through the sealing seat 49, realizing circuit conduction. Under normal circumstances, the sealing seat 49 can seal the vent 46. When the pressure inside the battery cell 41 is high, it can rupture the sealing seat 49, thereby allowing pressure to be released from the battery cell 41 through the vent 46, preventing the battery from exploding.

[0049] In the above implementation methods 3-4, the sealing baffle 48 and the sealing seat 49 are both made of conductive metal materials, which can realize the current transmission between the positive electrode plate 412 of the battery cell 41 and the conductive support 43. By setting a relatively weak and easily broken position on it, the easily broken position will be damaged under high pressure, thereby facilitating the battery cell 41 to release pressure through the vent 46 under high pressure.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric cell packaging structure, characterized by comprising: include: Battery cell; A conductive housing that can be electrically connected to the battery's control circuit board; A conductive bracket capable of being electrically connected to the battery's control circuit board; And the sealing sleeve; The conductive housing has a receiving groove, and the battery cell is disposed in the receiving groove; the conductive support and the sealing sleeve are both disposed in the conductive housing and are located above or below the receiving groove; the positive and negative terminals of the battery cell are respectively connected to the conductive support and the conductive housing; the sealing sleeve is disposed between the conductive support and the conductive housing, and the conductive housing, the sealing sleeve, and the conductive support are all recessed inward at corresponding horizontal positions to form a mutually limiting structure.

2. The cell packaging structure of claim 1, wherein, The limiting structure includes a first limiting protrusion, a first limiting groove, a second limiting protrusion, and a second limiting groove, all positioned horizontally. The first limiting protrusion is disposed on the inner wall of the conductive shell, the first limiting groove is disposed on the outer wall of the sealing sleeve, the second limiting protrusion is disposed on the inner wall of the sealing sleeve, and the second limiting groove is disposed on the outer wall of the conductive bracket. The first limiting protrusion is engaged within the first limiting groove, and the second limiting protrusion is disposed within the second limiting groove.

3. The cell packaging structure of claim 1, wherein, The battery cell includes a battery cell body, on which a positive electrode plate and a negative electrode plate are disposed. The positive electrode plate is connected to a conductive support, and the negative electrode plate is connected to a conductive shell.

4. The cell packaging structure of claim 1, wherein, The sealing sleeve has a ring-shaped structure and an "L"-shaped support foot at its bottom. The conductive bracket is supported on the support foot.

5. The cell packaging structure of claim 1, wherein, The conductive support is provided with a vertically penetrating vent hole, and a sealing filler is provided inside the vent hole.

6. The cell packaging structure of claim 1, wherein, The conductive support is provided with an exhaust hole that runs vertically through it. A sealing baffle is provided at the bottom of the conductive support. The edge of the sealing baffle is pressed between the conductive support and the sealing sleeve, and the sealing baffle is electrically connected to the conductive support and the positive electrode of the battery cell.

7. The cell packaging structure of claim 1, wherein, The conductive support is provided with a vertically penetrating vent hole. A sealing seat is provided between the conductive support and the sealing sleeve. The sealing seat is a barrel-shaped structure with an open top. The conductive support is placed inside the sealing seat, and the sealing baffle is electrically connected to the conductive support and the positive electrode of the battery cell.

8. A cylindrical battery comprising: The device comprises a plastic body, a control circuit board, and a positive electrode post. The plastic body is mounted on a conductive housing. The control circuit board and the positive electrode post are both fixed to the plastic body. The upper end of the positive electrode post is exposed in the plastic body, and the lower end passes through the plastic body and connects to the control circuit board. The control circuit board is electrically connected to the conductive housing and the conductive support. The lower end of the conductive housing is also provided with a negative electrode portion, and the negative electrode plate is electrically connected to the negative electrode portion.

9. A cylindrical battery as claimed in claim 8, characterized in that The control circuit board is also connected to an electrical interface exposed in the conductive housing.

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