TCO assembly, battery module and lithium ion battery

Abstract

The utility model relates to the technical field of batteries, in particular to a TCO assembly, a battery module and a lithium ion battery. The TCO assembly comprises a temperature fuse, a first connecting piece and a second connecting piece, the temperature fuse comprises a body, a first mounting end and a second mounting end, the first mounting end and the second mounting end are arranged at two opposite ends of the body, and the body comprises a first mounting surface; the first connecting piece is connected with the first mounting end and extends outwards; the second connecting piece is connected with the first mounting surface and extends outwards; wherein a preset distance is kept between the first connecting piece and the second connecting piece, and the preset distance is smaller than the length of the body; and the extension directions of the first connecting piece and the second connecting piece are the same. The TCO assembly is small in width, and after the TCO assembly is connected with the second tab of the battery cell, a large installation size B can be reserved to meet the installation requirement of an external control circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a TCO component, a battery module and a lithium ion battery. Background Art

[0002] Nowadays, people's daily life, work, study and other activities are inseparable from the use of laptops. As the demand for laptops continues to increase, the demand for laptop batteries is also increasing. People are gradually increasing their requirements for the size, battery life, and safety performance of laptop batteries, especially in terms of safety performance.

[0003] Laptop batteries are mainly composed of three parts: battery cells, charge and discharge control circuit boards, and temperature feedback lines. The battery cells are responsible for countless charge and discharge operations. Due to their large capacity, they undergo violent chemical reactions and produce a lot of heat during use. For safety reasons, the battery cells need to be connected to TCO (temperature fuse) components for safety protection. However, referring to Figures 1 to 3 After the TCO component is assembled with the battery cell, the width of the TCO component is recorded as C, and the distance between a pole ear set on the battery cell and the edge of the battery cell is recorded as A. The design process of the battery cell cannot be adjusted, so the value of A is a constant. When the battery cell is welded to the external control circuit board, the installation dimension is recorded as B, B=AC. The current TCO component has a large width C value. After assembling it with the battery cell, the installation dimension B is small, which cannot meet the requirement of the external control circuit board for a larger installation dimension B, seriously affecting the processing of the external control circuit board. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a TCO component, a battery module and a lithium-ion battery to solve the problem that the width dimension C of the TCO component in the prior art is relatively large, and after assembling it with the battery cell, the installation dimension B is relatively small, which cannot meet the requirement of the external control circuit board for a larger installation dimension B, and seriously affects the processing of the external control circuit board.

[0005] The utility model discloses a TCO component, comprising: a temperature fuse, a first connecting piece and a second connecting piece, the temperature fuse comprising a body and a first mounting end and a second mounting end arranged at opposite ends of the body, the body comprising a first mounting surface; the first connecting piece is connected to the first mounting end and extends outward; the second connecting piece is connected to the first mounting surface and extends outward; wherein a preset distance is maintained between the first connecting piece and the second connecting piece, and the preset distance is less than the length of the body; the first connecting piece and the second connecting piece have the same extension direction.

[0006] Optionally, an edge of the second connecting member along the length direction of the second mounting end is located inside the second mounting end.

[0007] Optionally, the extension direction of the first connecting member and the second connecting member is perpendicular to the length direction of the body.

[0008] Optionally, a first notch is formed on the extension portion of the first connecting member, and the first notch is close to a connection between the second connecting member and the first connecting surface.

[0009] Optionally, along the width direction of the second connecting member, second notches are respectively formed on opposite sides of the extending portion of the second connecting member, so that the extending portion of the second connecting member can be bent along the second notches.

[0010] Optionally, the first connecting member and the second connecting member are respectively arranged on two opposite sides of the temperature fuse.

[0011] Optionally, a first insulating layer is provided on both sides of a connection between the first connecting member and the first mounting end, and a second insulating layer is provided on both sides of a connection between the second connecting member and the second mounting end.

[0012] Optionally, the first connecting member and the second connecting member are made of nickel sheets; and the first mounting end and the first mounting surface are made of metal material.

[0013] The utility model also discloses a battery module, including a battery cell, a first pole ear and a second pole ear arranged at one end of the battery cell, and the TCO component mentioned above, wherein the end of the first connecting member away from the first mounting end is connected to the second pole ear, the second connecting member is located on a side away from the first pole ear, and the body is located in the top sealing area of ​​the battery cell.

[0014] The utility model also discloses a lithium ion battery, comprising the battery module mentioned above.

[0015] Compared with the prior art, the TCO component, battery module and lithium-ion battery provided by the embodiment of the utility model have the following beneficial effects:

[0016] The first connecting member is connected to the first mounting end of the temperature fuse and extends outward, the first connecting member is connected to the first mounting surface of the main body and extends outward, a preset spacing is maintained between the first connecting member and the second connecting member, and the preset spacing is smaller than the width of the main body, thereby achieving the purpose of reducing the width of the TCO component. After the TCO component of this embodiment is connected to the second pole ear of the battery cell, a larger installation dimension B can be reserved, thereby achieving the purpose of meeting the installation requirements of the external control circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 It is a schematic diagram of the structure of the existing TCO components;

[0019] Figure 2 It is a schematic diagram of the structure of the battery cell provided by the embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the installation structure of existing TCO components and battery cells;

[0021] Figure 4 This is one of the structural schematic diagrams of the TCO assembly provided by the embodiment of the utility model;

[0022] Figure 5 This is the second structural schematic diagram of the TCO component provided by the embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the main body provided by the embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the installation structure of the TCO component and the battery cell provided in an embodiment of the utility model.

[0025] The reference numerals in the figures are:

[0026] 10. Temperature fuse; 110. Main body; 111. First mounting surface; 120. First mounting end; 130. Second mounting end; 20. First connecting member; 201. First notch; 30. Second connecting member; 301. Second notch; 40. First insulating layer; 60. Battery cell; 610. First pole ear; 620. Second pole ear; 630. Top sealing area; 70. Welding point. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0028] The utility model embodiment provides a TCO component, such as Figures 4 to 6As shown, it includes a temperature fuse 10, a first connecting member 20 and a second connecting member 30. The temperature fuse 10 includes a body 110 and a first mounting end 120 and a second mounting end 130 arranged at opposite ends of the body 110. The body 110 includes a first mounting surface 111; the first connecting member 20 is connected to the first mounting end 120 and extends outward; the second connecting member 30 is connected to the first mounting surface 111 and extends outward; wherein a preset distance is maintained between the first connecting member 20 and the second connecting member 30, and the preset distance is smaller than the length of the body 110; the first connecting member 20 and the second connecting member 30 have the same extension direction.

[0029] The first connector 20 is connected to the first mounting end 120 of the temperature fuse 10 and extends outward, the first connector 20 is connected to the first mounting surface 111 of the body 110 and extends outward, a preset spacing is maintained between the first connector 20 and the second connector 30, and the preset spacing is smaller than the width of the body 110, thereby reducing the width of the TCO component. After the TCO component of this embodiment is connected to the second pole ear 620 of the battery cell 60, a larger installation dimension B can be reserved, thereby meeting the installation requirements of the external control circuit board.

[0030] Reference Figure 3 and Figure 7 The installation dimension B reserved after the TCO component of this embodiment is connected to the second electrode of the battery cell 60 is larger than the installation dimension B reserved after the existing TCO component is connected to the second electrode of the battery cell 60.

[0031] In this embodiment, the first connecting member 20 and the first mounting end 120 are welded, and the second connecting member 30 and the first mounting surface 111 are welded. The first mounting end 120 and the first mounting surface 111 are used to provide a stable connection environment to ensure the connection stability between the components of the TCO assembly.

[0032] In this embodiment, the first connecting member 20 and the second connecting member 30 are nickel sheets, and the first mounting surface 111 and the first mounting end 120 are made of metal materials. For example, the first mounting surface 111 and the first mounting end 120 are copper sheets.

[0033] The above preset spacing can be adjusted according to the requirements of the installation size during the actual installation process, and the preset spacing is not specifically limited here.

[0034] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 , an edge of the second connecting member 30 along the length direction of the second mounting end 130 is located inside the second mounting end 130 .

[0035] The setting position of the second connector 30 can minimize the width C of the TCO component, and maximize the corresponding installation dimension B after the TCO component is connected to the battery cell 60, thereby better meeting the installation requirements of the external control circuit board.

[0036] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 The extension direction of the first connecting member 20 and the second connecting member 30 is perpendicular to the length direction of the body 110 .

[0037] Among them, the extension direction of the first connector 20 and the second connector 30 is set to be perpendicular to the length direction of the main body 110 to facilitate the cooperation between the TCO component and the battery cell 60, increase the contact area between the first connector 20 and the second pole ear 620 of the battery cell 60 when welding, and improve the connection stability between the two. At the same time, it can also increase the contact area between the second connector 30 and the external control circuit board when welding, and improve the connection stability between the two.

[0038] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 A first notch 201 is formed on the extension portion of the first connecting member 20 , and the first notch 201 is close to the connection between the second connecting member 30 and the first connecting surface.

[0039] The first notch 201 can reduce the effect of the stress on the first connector 20 on the welding point between the first connector 20 and the first mounting surface 111, thereby improving the connection stability between the first connector 20 and the first mounting surface 111. The first notch 201 of the embodiment is in an arc shape.

[0040] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 Along the width direction of the second connecting member 30 , second notches 301 are respectively formed on opposite sides of the extending portion of the second connecting member 30 , so that the extending portion of the second connecting member 30 is bent along the second notches 301 .

[0041] Among them, after the TCO component of this embodiment is connected to the battery cell 60, the end of the first connector 20 away from the first mounting end 120 is connected to the second pole ear 620 of the battery cell 60. After the connection is completed, in order to reduce the size of the battery cell 60 module, the overlapping part of the first connector 20 and the second pole ear 620 is bent into the top sealing area 630 of the battery cell 60. The setting of the second notch 301 can prevent the first connector 20 from tearing due to excessive stress when bending, thereby protecting the first connector 20; at the same time, the setting of the second notch 301 can also improve the convenience of bending the overlapping part of the first connector 20 and the second pole ear 620. The shape of the second notch 301 of this embodiment is an arc. The bent part (not shown in the figure) is located in the top sealing area 630 of the battery cell 60.

[0042] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 The first connecting member 20 and the second connecting member 30 are respectively arranged on two opposite sides of the temperature fuse 10 .

[0043] In order to prevent the first connecting member 20 and the second connecting member 30 from interfering with each other during the welding process with the temperature fuse 10, the first connecting member 20 and the second connecting member 30 are respectively arranged on the opposite side surfaces of the temperature fuse 10 to improve the connection stability of the first connecting member 20 and the second connecting member 30 on the temperature fuse 10.

[0044] Figure 4 , Figure 5 and Figure 7 The dot structures arranged in an array are welding points 70 .

[0045] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 A first insulating layer 40 is provided at the connection between the first connecting member 20 and the first mounting end 120 , and a second insulating layer (not shown in the figure) is provided at the connection between the second connecting member 30 and the second mounting end 130 .

[0046] Among them, after the TCO component of this embodiment is connected to the battery cell 60, in order to avoid the connection between the first connector 20 and the first mounting end 120 and the connection between the second connector 30 and the first mounting surface 111 directly contacting the battery cell 60, thereby preventing the battery cell 60 from short-circuiting, the purpose of protecting electricity is achieved. The first insulating layer 40 and the second insulating layer can be made of insulating tape, insulating coating or thermoplastic sleeve, etc., which are not specifically limited here. In this embodiment, the first insulating layer 40 and the second insulating layer are both made of insulating tape, and the operator only needs to stick the insulating tape to the target position. The operation is simple and convenient, and the insulating tape is easy to remove.

[0047] The present application also discloses a battery module, referring to Figure 7 , including a battery cell 60, a first pole tab 610 and a second pole tab 620 provided at one end of the battery cell 60, and the TCO assembly in the aforementioned embodiment. The end of the first connector 20 away from the first mounting end 120 is welded to the second pole tab 620, the second connector 30 is located on the side away from the first pole tab 610, and the body 110 is located in the top sealing area 630 of the battery cell 60. The battery module includes the same structure and beneficial effects as the TCO assembly in the aforementioned embodiment. The structure and beneficial effects of the TCO assembly have been described in detail in the aforementioned embodiment and will not be repeated here.

[0048] The present application also discloses a lithium-ion battery, including the battery module in the above embodiment. The battery module includes the same structure and beneficial effects as the TCO component in the above embodiment. The structure and beneficial effects of the TCO component have been described in detail in the above embodiment and will not be repeated here.

[0049] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A TCO component, characterized in that: include: A temperature fuse comprises a body and a first mounting end and a second mounting end arranged at opposite ends of the body, wherein the body comprises a first mounting surface; A first connecting member, connected to the first mounting end and extending outwardly; a second connecting member, connected to the first mounting surface and extending outward; Wherein, a preset distance is maintained between the first connecting member and the second connecting member, and the preset distance is smaller than the length of the main body; and the first connecting member and the second connecting member extend in the same direction.

2. The TCO component according to claim 1, characterized in that An edge of the second connecting member along the length direction of the second mounting end is located inside the second mounting end.

3. The TCO component according to claim 1, characterized in that The extension direction of the first connecting member and the second connecting member is perpendicular to the length direction of the body.

4. The TCO component according to claim 1, characterized in that A first notch is formed on the extension portion of the first connecting member, and the first notch is close to the connection between the second connecting member and the first connecting surface.

5. The TCO component according to claim 1, characterized in that Second notches are respectively formed on opposite sides of the extending portion of the second connecting member along the width direction of the second connecting member, so that the extending portion of the second connecting member can be bent along the second notches.

6. The TCO component according to claim 1, characterized in that The first connecting member and the second connecting member are respectively arranged on two opposite sides of the temperature fuse.

7. The TCO component according to any one of claims 1 to 6, characterized in that: A first insulating layer is disposed on both sides of a connection between the first connecting member and the first mounting end, and a second insulating layer is disposed on both sides of a connection between the second connecting member and the second mounting end.

8. The TCO component according to any one of claims 1 to 6, characterized in that: The first connecting member and the second connecting member are made of nickel sheets; the first mounting end and the first mounting surface are made of metal materials.

9. A battery module, characterized in that: It includes a battery cell, a first pole ear and a second pole ear arranged at one end of the battery cell, and the TCO component according to any one of claims 1 to 8, wherein the end of the first connector away from the first mounting end is connected to the second pole ear, the second connector is located on a side away from the first pole ear, and the body is located in the top sealing area of ​​the battery cell.

10. A lithium ion battery characterized by: Comprising the battery module as claimed in claim 9.

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