Battery core module
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2024-06-26
- Publication Date
- 2026-06-30
Smart Images
Figure 2026521559000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a battery core module, and more particularly to a battery core module including a thermal cut-off element. This application claims priority based on Korean Patent Application No. 10-2023-0145119 filed on October 26, 2023, and all of the contents disclosed in the specification and drawings of the application are incorporated into this application.
Background Art
[0002] A battery assembly of an electronic product (e.g., a notebook computer, a tablet, etc.) usually incorporates a battery core module. In order to pass the impact / drop test of the electronic product, buffering and protection measures for the positive electrode, negative electrode, and thermal cut-off element on the end of the battery core module are required. Conventional electronic products used insulating paper to surround the positive and negative electrodes and used foam to protect the thermal cut-off element and the positive electrode adjacent to the thermal cut-off element. However, such a method has problems that it is difficult to protect the negative electrode using foam and the assembly is complicated and inconvenient.
Summary of the Invention
Problems to be Solved by the Invention
[0003] The problem to be solved by the present invention is to provide a battery core module that can effectively protect the electrode structure with a simple structure.
Means for Solving the Problems
[0004] The battery core module according to the present invention includes a battery unit and an electrical connection assembly. The battery unit includes a battery body, a first electrode and a second electrode, the battery body having an end, and the first electrode and the second electrode being located at the end. The electrical connection assembly is located at the end and includes a first conductive element, a second conductive element, a third conductive element, a thermal cutoff element, and an insulating adhesive. The insulating adhesive surrounds a portion of the first conductive element, a portion of the second conductive element, and a portion of the third conductive element, and the thermal cutoff element is connected between the second conductive element and the third conductive element. The first conductive element is connected to the first electrode, and the second conductive element is connected to the second electrode.
[0005] In one embodiment of the present invention, the insulating adhesive is bonded to the first conductive element, the second conductive element, and the third conductive element by insert injection molding.
[0006] In one embodiment of the present invention, the insulating adhesive has two openings, and a local portion of the first conductive element and a local portion of the second conductive element are exposed through the two openings and connected to the first electrode and the second electrode, respectively.
[0007] In one embodiment of the present invention, the insulating adhesive has two openings, and local portions of the second conductive element and the third conductive element are exposed through the two openings and connected to both ends of the thermal cutoff element, respectively.
[0008] In one embodiment of the present invention, the ends of the first conductive element and the ends of the third conductive element protrude from the insulating adhesive.
[0009] In one embodiment of the present invention, the first electrode extends onto the electrical connection assembly in a bent state and is connected to the first conductive element, and the second electrode extends onto the electrical connection assembly in a bent state and is connected to the second conductive element.
[0010] In the present invention, the battery core module is incorporated into an electronic product, the ends of the first conductive element and the ends of the third conductive element are connected to the circuit board of the electronic product, the first electrode is connected to the circuit board via the first conductive element, and the second electrode is connected to the circuit board via the second conductive element, a thermal cutoff element, and a third conductive element.
[0011] In the present invention, the insulating adhesive surrounds a portion of the first conductive element, a portion of the second conductive element, and a portion of the third conductive element, and the thermal cutoff element may be connected between the second conductive element and the third conductive element.
[0012] In the present invention, the insulating adhesive is bonded to the first conductive element, the second conductive element, and the third conductive element, and the thermal cutoff element can be connected to the second conductive element and the third conductive element by laser welding.
[0013] In the present invention, the first conductive element, the second conductive element, the third conductive element, the thermal cutoff element, and the insulating adhesive may be provided together at the end of the battery body after first forming the electrical connection assembly. [Effects of the Invention]
[0014] As described above, the battery core module according to the present invention surrounds the first conductive element, the second conductive element, and the third conductive element with an insulating adhesive. This provides good protection for the first conductive element, the second conductive element, and the third conductive element, the thermal cutoff element, and the insulating adhesive are first assembled and then attached together to the end of the battery body, making assembly very simple. [Brief explanation of the drawing]
[0015] [Figure 1] This is a perspective view of a local portion of a battery core module according to one embodiment of the present invention. [Figure 2] Figure 1 is an exploded view of the battery core module. [Figure 3] This is a plan view of the electrical connection assembly shown in Figure 1. [Figure 4] Figure 1 shows the first and second electrodes in their non-bent state. [Figure 5] Figure 2 is a perspective view of a partial structure of the electrical connection assembly. [Figure 6] Figure 5 is an exploded view of the electrical connection assembly. [Modes for carrying out the invention]
[0016] Figure 1 is a perspective view of a local portion of a battery core module according to one embodiment of the present invention. Figure 2 is an exploded view of the battery core module in Figure 1. Figure 3 is a plan view of the electrical connection assembly in Figure 1. Referring to Figures 1 to 3, the battery core module 100 according to this embodiment includes a battery unit 110 and an electrical connection assembly 120. The battery unit 110 includes a battery body 112, a first electrode 114, and a second electrode 116, the battery body 112 having an end 112a, and the first electrode 114 and the second electrode 116 being arranged at the end 112a. The electrical connection assembly 120 is arranged at the end 112a of the battery body 112 and is common with the first electrode 114 and the second electrode 116 to constitute an electrode structure.
[0017] The electrical connection assembly 120 includes a first conductive element 122, a second conductive element 124, a third conductive element 126, a thermal cutoff element 128, and an insulating adhesive 129. The insulating adhesive 129 wraps around portions of the first conductive element 122, the second conductive element 124, and the third conductive element 126, and the thermal cutoff element 128 is connected between the second conductive element 124 and the third conductive element 126. The first conductive element 122 is connected to the first electrode 114, and the second conductive element 124 is connected to the second electrode 116.
[0018] As described above, in this embodiment, the battery core module 100 surrounds the first conductive element 122, the second conductive element 124, and the third conductive element 126 using insulating adhesive 129. This provides good protection for the first conductive element 122, the second conductive element 124, and the third conductive element 126. Assembly is very simple because the first conductive element 122, the second conductive element 124, the third conductive element 126, the thermal cutoff element 128, and the insulating adhesive 129 are first assembled in the electrical connection assembly 120 and then placed together on the end 112a of the battery body 112. Furthermore, since the insulating adhesive 129 surrounds only the first conductive element 122, the second conductive element 124, and the third conductive element 126, and not the thermal cutoff element 128, the thermal cutoff element 128 is easily disassembled and reworked.
[0019] In this embodiment, the insulating adhesive 129 is bonded to the first conductive element 122, the second conductive element 124, and the third conductive element 126 by insert injection molding, and the material of the insulating adhesive 129 is a plastic applicable to injection molding, but the present invention is not limited thereto. After bonding the insulating adhesive 129 to the first conductive element 122, the second conductive element 124, and the third conductive element 126 by insert injection molding or other methods, the thermal cutoff element 128 is bonded to the second conductive element 124 and the third conductive element 126.
[0020] FIG. 4 shows the non-folded states of the first electrode and the second electrode in FIG. 1. After the electrical connection assembly 120 is disposed at the end 112a of the battery body 112, the first electrode 114 is bent from the non-folded state shown in FIG. 4 to the folded state shown in FIG. 1, extends onto the electrical connection assembly 120, and is connected to the first conductive element 122. The second electrode 116 is bent from the non-folded state shown in FIG. 4 to the folded state shown in FIG. 1, extends onto the electrical connection assembly 120, and is connected to the second conductive element 124.
[0021] FIG. 5 is a perspective view of a partial structure of the electrical connection assembly in FIG. 2. FIG. 6 is an exploded view of the electrical connection assembly in FIG. 5. Referring to FIGS. 5 and 6, specifically, the insulating adhesive 129 according to this embodiment includes two openings 129a and 129b. The local portions of the first conductive element 122 and the second conductive element 124 are respectively exposed through the two openings 129a and 129b, and are connected to the first electrode 114 and the second electrode 116 shown in FIGS. 1 and 2 respectively.
[0022] In addition, the insulating adhesive 129 according to this embodiment includes two openings 129c and 129d. The local portions of the second conductive element 124 and the third conductive element 126 are respectively exposed through the two openings 129c and 129d, and are connected to both ends of the thermal cut-off element 128 respectively. The thermal cut-off element 128 is connected to the second conductive element 124 and the third conductive element 126 by, for example, laser welding or other appropriate methods, but the present invention is not limited thereto.
[0023] When the battery core module 100 is incorporated into a corresponding electronic product, the first electrode 114 is connected to a corresponding circuit board in the electronic product through the first conductive element 122, and the second electrode 116 is connected to a corresponding circuit board in the electronic product through the second conductive element 124, the thermal cut-off element 128, and the third conductive element 126\. In this embodiment, the ends 1221 of the first conductive element 122 and the ends 1261 of the third conductive element 126 protrude and extend from the insulating adhesive 129, so they are suitable for connection to the circuit board.
[0024] As described above, the battery core module according to the present invention surrounds the first conductive element, the second conductive element, and the third conductive element with an insulating adhesive. This provides good protection for the first conductive element, the second conductive element, and the third conductive element, the thermal cutoff element, and the insulating adhesive are placed together at the end of the battery body after the electrical connection assembly is formed, making assembly very easy. In addition, since the insulating adhesive surrounds only the first conductive element, the second conductive element, and the third conductive element, and not the thermal cutoff element, the thermal cutoff element can be easily disassembled and reworked. [Explanation of symbols]
[0025] 100: Battery core module 110: Battery Unit 112: Battery Unit 112a: End 114: 1st electrode 116:Second electrode 120: Electrical connection assembly 122: First conductive element 1221, 1261: Terminal 124: Second conductive element 126: Third conductive element 128: Thermal cutoff element 129: Insulating adhesive 129a, 129b, 129c, 129d: opening
Claims
1. A battery unit comprising a battery body, a first electrode and a second electrode, wherein the battery body has an end, and the first electrode and the second electrode are positioned at the end, A battery core module comprising an electrical connection assembly disposed at the end, comprising a first conductive element, a second conductive element, a third conductive element, a thermal cutoff element, and an insulating adhesive, wherein the insulating adhesive surrounds a portion of the first conductive element, a portion of the second conductive element, and a portion of the third conductive element, the thermal cutoff element is connected between the second conductive element and the third conductive element, the first conductive element is connected to the first electrode, and the second conductive element is connected to the second electrode.
2. The battery core module according to claim 1, wherein the insulating adhesive is bonded to the first conductive element, the second conductive element, and the third conductive element by insert injection molding.
3. The battery core module according to claim 1, wherein the insulating adhesive has two openings, and a local portion of the first conductive element and a local portion of the second conductive element are exposed through the two openings and connected to the first electrode and the second electrode, respectively.
4. The battery core module according to claim 1, wherein the insulating adhesive has two openings, and local portions of the second conductive element and the third conductive element are each exposed through the two openings and connected to both ends of the thermal cutoff element, respectively.
5. The battery core module according to claim 1, wherein the ends of the first conductive element and the third conductive element protrude from the insulating adhesive.
6. The battery core module according to claim 5, wherein the first electrode extends on the electrical connection assembly in a bent state and is connected to the first conductive element, and the second electrode extends on the electrical connection assembly in a bent state and is connected to the second conductive element.
7. The aforementioned battery core module is incorporated into an electronic product. The ends of the first conductive element and the ends of the third conductive element are connected to the circuit board of the electronic product. The battery core module according to claim 1, wherein the first electrode is connected to the circuit board via the first conductive element, and the second electrode is connected to the circuit board via the second conductive element, the thermal cutoff element, and the third conductive element.
8. The battery core module according to claim 1, wherein the insulating adhesive surrounds a portion of the first conductive element, a portion of the second conductive element, and a portion of the third conductive element, and the thermal cutoff element is connected between the second conductive element and the third conductive element.
9. The battery core module according to claim 1, wherein the insulating adhesive is bonded to the first conductive element, the second conductive element, and the third conductive element, and the thermal cutoff element is connected to the second conductive element and the third conductive element by laser welding.
10. The battery core module according to claim 1, wherein the first conductive element, the second conductive element, the third conductive element, the thermal cutoff element, and the insulating adhesive are first provided together at the end of the battery body after the electrical connection assembly has been formed.