Cap, battery and battery pack

Abstract

The utility model discloses a cap which comprises a bearing piece, a control piece, a negative pole piece, a first protection piece and a second protection piece, the bearing piece is provided with a containing groove, the control piece, the negative pole piece, the first protection piece and the second protection piece are all arranged in the containing groove, and the negative pole piece and the first protection piece are arranged on the two sides of the control piece respectively. The second protection piece is connected to the side, away from the control piece, of the first protection piece. Wherein current conduction can be carried out between the control piece and the negative pole piece, and current conduction can be carried out among the control piece, the first protection piece and the second protection piece. The utility model also discloses a battery and a battery pack. The bearing piece, the control piece, the negative pole piece, the first protection piece and the second protection piece are arranged in a matched mode, so that the control piece is stored in the cap, the traditional mode that a circuit board needs to be externally connected is changed, the size of the battery is reduced, and production and assembly are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a cap, a battery, and a battery pack. Background Technology

[0002] The cap plays an important role in lithium batteries. One side of the cap is connected to the positive terminal of the cell, and the other side leads out the positive terminal. Currently, the existing caps also need to be connected to an external circuit board to realize the overcurrent and overvoltage protection functions of the entire battery. This will increase the size of the entire battery and make it inconvenient for production and assembly. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a cap, a battery, and a battery pack.

[0004] The present invention discloses a cap comprising: a carrier, a control component, a negative electrode component, a first protective component, and a second protective component. The carrier has a receiving groove, and the control component, the negative electrode component, the first protective component, and the second protective component are all disposed within the receiving groove. The negative electrode component and the first protective component are respectively disposed on both sides of the control component, and the second protective component is connected to the side of the first protective component away from the control component. Current can be conducted between the control component and the negative electrode component, and current can be conducted between the control component, the first protective component, and the second protective component.

[0005] According to one embodiment of the present invention, the second protective member includes a protective sheet and a connecting sheet. The protective sheet is connected to the side of the first protective member away from the control member. There is a deformation space between the protective sheet and the control member. The connecting sheet is connected to the protective sheet.

[0006] According to one embodiment of the present invention, the control component includes a control board and a positive electrode post. The control board is disposed in a receiving groove, the negative electrode post and the first protective member are respectively disposed on both sides of the control board, and the positive electrode post is disposed on the control board and extends outside the receiving groove.

[0007] According to one embodiment of the present invention, it further includes an insulating member disposed on the side of the control panel facing the second protective member.

[0008] According to one embodiment of the present invention, the first protective component is a PTC thermistor.

[0009] According to one embodiment of the present invention, the cross-section of the negative electrode is annular.

[0010] According to one embodiment of the present invention, the cross-section of the first protective member is annular.

[0011] According to one embodiment of the present invention, the carrier is made of insulating material.

[0012] The present invention discloses a battery including the aforementioned cap.

[0013] This utility model discloses a battery pack, the aforementioned battery.

[0014] The beneficial effect of this utility model is that the carrier, control component, negative electrode component, first protective component and second protective component are arranged in a coordinated manner, so that the control component is stored inside the cap, which changes the traditional method of requiring an external circuit board. This not only helps to reduce the size of the battery, but also facilitates production and assembly. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the cap;

[0017] Figure 2 This is a breakdown diagram of the blocked shot's state.

[0018] Figure 3 This is a cross-sectional view of the cap.

[0019] Explanation of reference numerals in the attached figures

[0020] 1. Supporting component; 11. Receiving groove;

[0021] 2. Control components; 21. Control board; 22. Positive terminal;

[0022] 3. Negative electrode component;

[0023] 4. First protective component;

[0024] 5. Second protective component; 51. Protective plate; 52. Connecting plate;

[0025] 6. Deformation space;

[0026] 7. Insulating components. Detailed Implementation

[0027] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0028] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Example 1

[0030] like Figures 1-3 As shown, Figure 1 A schematic diagram of the three-dimensional structure of the cap; Figure 2 This is a breakdown diagram of the blocked shot's state. Figure 3 This is a cross-sectional view of the cap. The cap includes a support component 1, a control component 2, a negative electrode component 3, a first protective component 4, and a second protective component 5. The control component 2, negative electrode component 3, first protective component 4, and second protective component 5 are all disposed on the support component 1. The negative electrode component 3 and the first protective component 4 are respectively disposed on both sides of the control component 2. The second protective component 5 is connected to the first protective component. Current can be conducted between the negative electrode component 3 and the control component 2, and current can also be conducted between the first protective component 4, the second protective component 5, and the control component 2. Specifically, the cap is placed at one end of the battery during use, and the positive electrode tab of the battery is connected to the second protective component 5.

[0031] In practical applications, the carrier 1 has a receiving groove 11, and the control component 2, negative electrode component 3, first protective component 4, and second protective component 5 are all located within the receiving groove 11. The negative electrode component 3 is located on the side of the control component 2 near the opening of the receiving groove 11. In this embodiment, the carrier 1 is made of an insulating material, such as plastic; thus, when the cap is applied to the battery, the carrier 1 forms an insulation with the battery's steel casing, preventing direct conduction between the positive and negative electrodes.

[0032] The control component 2 includes a control board 21 and a positive terminal 22. The control board 21 is disposed within the receiving groove 11. The negative terminal 3 is disposed on the side of the control board 21 facing the groove opening. The first protective component 4 is disposed on the side of the control board 21 away from the negative terminal 3. The positive terminal 22 and the negative terminal 3 are disposed on the same side, and the positive terminal 22 protrudes beyond the groove opening of the receiving groove 11, that is, the positive terminal 22 extends outside the receiving groove 11. The positive terminal 22 and the control board 21 can conduct current. It should be noted that the control board 21 is an existing circuit board, which has corresponding electronic components and an overcurrent and overvoltage protection system. In this embodiment, the electronic components on the control board 21 are all located on the side facing the receiving groove 11.

[0033] In practical applications, the negative electrode 3 has a ring-shaped cross-section and is located at the edge of the support member 1, while the positive electrode post 22 is located inside the ring. The negative electrode 3 is made of conductive material to facilitate connection with the negative electrode of the control board 21 and subsequent current conduction.

[0034] The first protective element 4 is an existing PTC thermistor, which is connected to the positive terminal of the control board 21. Specifically, the cross-section of the first protective element 4 is also annular, and the electronic components on the control board 21 are located inside the annulus.

[0035] The second protective component 5 includes a protective sheet 51 and a connecting piece 52. The protective sheet 51 is located on the side of the first protective component 4 away from the control board 21, and the connecting piece 52 is connected to the side of the protective sheet 51 away from the first protective component 4. A deformation space 6 exists between the protective sheet 51 and the control board 21, within which the protective sheet 51 can deform in the F direction. Specifically, the side of the protective sheet 51 closest to the control board 21 is curved. Initially, the opening of the curved surface faces the control board 21. As the internal pressure of the battery increases during use, the curved surface moves in the F direction. During this movement, the protective sheet 51 gradually disconnects from the connecting piece 52. Eventually, the opening of the curved surface faces the connecting piece 52, and the protective sheet 51 and the connecting piece 52 are no longer connected. In practical applications, the connecting piece 52 is connected to the positive electrode tab of the battery cell. When the protective sheet 51 disconnects from the connecting piece 52, it means that the positive electrode tab of the battery cell cannot conduct properly, and the battery cannot discharge or charge normally, thus protecting the battery.

[0036] Furthermore, the cap also has an insulating element 7, which is located within the deformation space 6 and is connected to the control board 21. Specifically, the insulating element 7 covers the electronic components on the control board 21 to prevent the electronic components from contacting other parts, thereby improving safety performance.

[0037] In summary, the carrier 1, control 2, negative electrode 3, first protection 4, and second protection 5 are arranged in a coordinated manner so that the control 2 is located inside the cap, which changes the traditional method of requiring an external circuit board. This not only helps to reduce the size of the battery, but also facilitates production and assembly.

[0038] Example 2

[0039] A battery includes a cap, which is the same as that in Embodiment 1. For detailed structure, please refer to the description of Embodiment 1 above, which will not be repeated here.

[0040] Example 3

[0041] A battery pack comprising multiple batteries connected together. The battery in this embodiment adopts the structure of Embodiment 2. For details of the structure, please refer to the description of Embodiment 2 above, which will not be repeated here.

[0042] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A cap, characterized in that, include: The carrier (1), control (2), negative electrode (3), first protection (4) and second protection (5) are provided. The carrier (1) has a receiving groove (11). The control (2), negative electrode (3), first protection (4) and second protection (5) are all disposed in the receiving groove (11). The negative electrode (3) and the first protection (4) are respectively disposed on both sides of the control (2). The second protection (5) is connected to the side of the first protection (4) away from the control (2). The control (2) and the negative electrode (3) can be connected by current, and the control (2), the first protection (4) and the second protection (5) can be connected by current.

2. The cap according to claim 1, characterized in that, The second protective element (5) includes a protective plate (51) and a connecting plate (52). The protective plate (51) is connected to the side of the first protective element (4) away from the control element (2). There is a deformation space (6) between the protective plate (51) and the control element (2). The connecting plate (52) is connected to the protective plate (51).

3. The cap according to claim 1, characterized in that, The control component (2) includes a control board (21) and a positive terminal (22). The control board (21) is disposed in the receiving groove (11). The negative terminal (3) and the first protective component (4) are respectively disposed on both sides of the control board (21). The positive terminal (22) is disposed on the control board (21) and extends to the outside of the receiving groove (11).

4. The cap according to claim 3, characterized in that, It also includes an insulating element (7), which is disposed on the side of the control panel (21) facing the second protective element (5).

5. The cap according to claim 1, characterized in that, The first protective component (4) is a PTC thermistor.

6. The cap according to any one of claims 1-5, characterized in that, The cross-section of the negative electrode (3) is annular.

7. The cap according to any one of claims 1-5, characterized in that, The cross-section of the first protective component (4) is annular.

8. The cap according to any one of claims 1-5, characterized in that, The carrier (1) is made of insulating material.

9. A battery, characterized in that, Includes the cap as described in any one of claims 1-8.

10. A battery pack, characterized in that, Includes the battery as described in claim 9.

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