Electrochemical equipment and electronic equipment
The electrochemical device addresses connection reliability and safety issues by using an insulating tape with optimized adhesive regions to reduce peeling forces and maintain energy density.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- NINGDE AMPEREX TECHNOLOGY LTD
- Filing Date
- 2024-04-03
- Publication Date
- 2026-05-15
AI Technical Summary
Existing electrochemical devices face issues with connection reliability between the electrode assembly and the case, leading to potential short circuits and reduced safety due to poor adhesion of insulating tape, which can tear during falls, and affect energy density.
The electrochemical device incorporates an insulating tape with specific area ratios and adhesive regions to enhance connection reliability, reducing the peeling force and minimizing the risk of tearing, while maintaining a compact design.
The solution improves connection reliability and safety by minimizing the risk of electrode assembly tearing, while reducing the volume and weight of the insulating tape, thus enhancing the energy density of the device.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of energy storage devices, and in particular to electrochemical devices and electronic devices and is related thereto.
Background Art
[0002] With the development of electronic devices, in order to meet the requirements for the available time of electronic devices, larger-capacity batteries for electronic devices are required. The battery of an electronic device usually includes a case and an electrode assembly located inside the case, and the case serves to protect the electrode assembly against it. Among them, between the case and the electrode assembly, they may be adhered with an insulating tape . When the electronic device falls, there is a possibility that the electrode assembly may be torn by the insulating tape , which may cause a risk of short circuit inside the electrode assembly. If the adhesion of the insulating tape is poor, there is a risk that the top seal may break, affecting the safety of the electronic device.
Summary of the Invention
[0003]
[0004] . A first aspect of the present invention is an electrochemical device including a case, an electrode assembly, and an insulating tape, where at least a part of the electrode assembly is located inside the case, the insulating tape is located between the case and the electrode assembly, and the insulating tape includes a first surface adhered to the electrode assembly and a second surface adhered to the case , and the first surface includes a first adhesion region, and the second surface includes a second adhesion region , and the first surface includes a first adhesion region, and the second surface includes a second adhesion region Here, the area A of the first adhesive region and the area B of the second adhesive region are 0.08 ≤ B / A ≤ 0 Provide an electrochemical apparatus that satisfies 0.965. In another possible design, 0.15 ≤ B / A ≤ It is 0.85.
[0005] In one possible design, the first bonding region has a first outer edge, and the second bonding region has a second outer edge It has a border, and the distance between the orthographic projection of the second outer edge on the first surface and the first outer edge is h, The width of surface 1 is W2, where 0.035 × W2 ≤ h ≤ 0.4 × W2. In a possible design, 0.05 × W² ≤ h ≤ 0.35 × W².
[0006] In one possible design, the electrode assembly has a third surface that adheres to the insulating tape, and the first contact The bonding region covers the orthographic projection of the second bonding region on the third surface.
[0007] In one possible design, the electrode assembly has a third surface to which it adheres to the insulating tape, and the third surface The length of the surface is L1, and along the width direction of the electrochemical apparatus, the first bonding region is aligned with the first axis The third surface has a second axis, and the orthographic projection of the first axis on the third surface and the second axis The distance between them is D, and D ≤ 0.1 × L1.
[0008] In one possible design, the width of the third surface is W1, and along the longitudinal direction of the electrochemical apparatus. The first bonding region has a third axis, the third surface has a fourth axis, and the third axis The distance between the orthographic projection on surface 3 and the fourth axis is E, and E ≤ 0.1 × W1.
[0009] In one possible design, the orthographic projection of the geometric center of the second bonding region on the first surface is the first bonding region It coincides with the geometric center of the bonding region. In one possible design, the geometric center of the first bonding region and The distance extending from the geometric center of the second bonding region to the first outer edge along the same direction, and The ratio to the distance extending to the second outer edge is the same.
[0010] In one possible design, the length of the first bonding area is L2 and the width of the first bonding area is W2 Therefore, 0.4 × L1 ≤ L2 ≤ 0.8 × L1, and 0.4 × W1 ≤ W2 ≤ 0. It is 8 × W1.
[0011] In one possible design, insulating tape is laid in layers between a first adhesive member and a base material and a second adhesive member. The adhesive member includes the first adhesive member which adheres to the electrode assembly and the second adhesive member which adheres to the case. To glue.
[0012] In one possible design, the shapes of the first and second bonding areas are square, rectangular, It is one of the shapes selected from the group consisting of trapezoids, octagons, circles, and ellipses.
[0013] A second aspect of the present invention provides electronic equipment including the electrochemical apparatus described above.
[0014] The case of the electrochemical apparatus is subjected to external forces (for example, in a drop test the case is subjected to external forces) When the external force is received, the external force is transmitted from the case to the second adhesive area of the insulating tape, and the second adhesive The signal is transmitted from the region to the first bonding region, and then from the first bonding region to the electrode assembly. This is possible. Because the area of the first bonding region is larger than the area of the second bonding region, the first bonding Reduces the peeling force per unit area between the region and the electrode assembly, and further reduces the pressure under the action of external forces. The edge tape can reduce the risk of tearing the electrode assembly, and the electrode assembly and insulating tape This improves connection reliability and further enhances the safety of the electrode assembly. At the same time, the area of the second adhesive region of the insulating tape that connects to the case is relatively small. If it is small, on the premise of ensuring the connection reliability between the insulating tape and the case, the volume and weight of the insulating tape can be reduced, contributing to an improvement in the energy density of the electrochemical device.
[0015] It should be understood that the above-sketched description and the detailed description to be described later are merely exemplary and not limited to the present invention.
Brief Description of the Drawings
[0016] [Figure 1] FIG. 1 is a schematic diagram of the connection structure of the case, the electrode assembly, and the insulating tape in the first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram of the connection structure of the case, the electrode assembly, and the insulating tape in the second embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram of the connection structure of the case, the electrode assembly, and the insulating tape in the third embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of the structure in which the insulating tape in the fourth embodiment of the present invention is projected onto the third surface of the electrode assembly. [Figure 5] FIG. 5 is a schematic diagram of the structure in which the insulating tape in the fifth embodiment of the present invention is projected onto the third surface of the electrode assembly. [Figure 6] FIG. 6 is a schematic diagram of the structure in which the insulating tape in the sixth embodiment of the present invention is projected onto the third surface of the electrode assembly. [Figure 7] FIG. 7 is a side view of the electrochemical device provided in one embodiment of the present invention. [Figure 8] FIG. 8 is a schematic diagram of the structure of the electrochemical device provided in one embodiment of the present invention.
Explanation of Reference Numerals
[0017] 1 - Case, 2 - Electrode assembly, 21-Third surface, 211 - Second axis, 212 - Fourth axis, 3. Insulating tape, 31-First bonding region, 311 - First outer edge, 312 - First axis, 313 - Third axis, 32-Second bonding area, 321 - Second outer edge, 33-First adhesive member, 34-Second adhesive member, 35-Base material.
[0018] The drawings herein are incorporated into the specification and become part of this specification, and are applicable to the implementation of the invention. Examples are provided and used in interpreting the principles of the present invention together with the specification. [Modes for carrying out the invention]
[0019] In the following sections, in order to better understand the technical concept of the present invention, embodiments of the present invention will be presented in accordance with the drawings. I will explain this in detail.
[0020] The embodiments described below are not all embodiments of the present invention, but only some embodiments. This is clear. All other embodiments obtained based on the embodiments of the present invention are the same as those of the present invention. It falls within the scope of the claim.
[0021] The terminology used in the embodiments of this invention is solely for the purpose of describing specific embodiments. This is not intended to limit the invention. The unit used in the embodiments and claims of the present invention The forms "one kind," "above," "above," and "the said" clearly indicate other meanings from the context. Unless otherwise specified, it is intended to include multiple forms.
[0022] The terms "and / or" as used herein simply describe the relationship between related objects. This indicates that three relationships can exist; for example, "A and / or B" means that A exists on its own. This describes three situations: the simultaneous existence of A and B, and the existence of B alone. It should be understood that this is possible. Note that the character " / " in this specification usually means preceding The related object that follows indicates an "or" relationship.
[0023] Note that the directional terms such as "up," "down," "left," and "right" described in the embodiments of the present invention are as follows: This is described by the angles shown on the surface and is interpreted as a limitation on the embodiments of the present invention. It should not be done. Also, from the context, if one element is connected to the "above" or "below" another element... When mentioned, it can be directly connected to the "above" or "below" of other elements, as well as It should be understood that elements can also be connected indirectly to other elements through intermediate elements.
[0024] The embodiments of the present invention provide an electrochemical apparatus, and as shown in Figures 1-3, the electrochemical apparatus It includes a case 1 and an electrode assembly 2, the case 1 having a housing chamber and the electrode assembly 2 At least a portion of it is located within the housing chamber, and the case 1 protects the electrode assembly 2. It is used for the following purpose. Here, the electrode assembly 2 comprises a first electrode piece, a second electrode piece and a separator - may include. In the first pole piece and the second pole piece, one is the positive pole and the other is the negative pole. Yes. A separator is used to separate the first pole piece and the second pole piece, and the separator - is supported by a thermoplastic resin, for example, polyethylene or polypropylene. The separator is used to insulate the first pole piece from the second pole piece.
[0025] In the drop test, the electrochemical apparatus showed signs of the top seal breaking and electrode assembly 2 Due to the risk that the aluminum foil may tear, etc., electrode assembly Body 2 short-circuits, causing the electrochemical apparatus to break down. To solve this technical problem, see Figures 1-3. As shown, the electrochemical apparatus further includes insulating tape 3, and the insulating tape 3 is It is located between -1 and electrode assembly 2, and the insulating tape 3 adheres to electrode assembly 2. It includes a first surface and a second surface that adheres to case 1, wherein the first surface is part of the first bonding region 3 The electrode assembly 2 includes 1, and the second surface includes the second bonding region 32. That is, the electrode assembly 2 is an absolute By adhering the case 1 with edge tape 3, the electrode assembly 2 can be attached to the case 1 during the operation of the electrochemical apparatus. This prevents movement within the housing chamber of Case 1. Tape 3 also prevents short circuits between electrode assembly 2 and case 1, ensuring the electrochemical apparatus is properly functioning. It can be operated at all times. Here, the adhesive strength of the insulating tape 3 is the same as that of an electrochemical apparatus. It is related to factors such as mass and size. Generally, the adhesive strength range of insulating tape 3 is 2 The pressure is between MPa and 20 MPa. Furthermore, in the drop test, due to the action of external forces, There is a risk that the insulating tape 3 will break the aluminum foil of the electrode assembly 2.
[0026] In this embodiment, the area of the first adhesive region 31 is larger than the area of the second adhesive region 32. That is, the surface area of the insulating tape 3 that adheres to the case 1 is the same as the surface area that adheres to the electrode assembly 2. It is smaller than the surface area.
[0027] Case 1 of the electrochemical apparatus is subjected to an external force (for example, in a drop test, Case 1 is subjected to an external force). When a force is applied, the external force is transmitted from case 1 to the second adhesive area 32 of the insulating tape 3. , transmitted from the second bonding region 32 to the first bonding region 31, and from the first bonding region 31 It can be transmitted to the electrode assembly 2. The area of the first bonding region 31 is equal to the area of the second bonding region 3 Because it is larger than the area of 2, the area per unit area between the first bonding region 31 and the electrode assembly 2 This reduces peeling force and minimizes the risk of the insulating tape 3 tearing the aluminum foil of the electrode assembly 2. This improves the connection reliability between the electrode assembly 2 and the insulating tape 3, and further enhances the safety of the electrode assembly 2. The integrity can be improved. At the same time, the insulating tape 3 connects to the case 1. If the area of the second adhesive region 32 is relatively small, the connection between the insulating tape 3 and the case 1 will be With the premise of ensuring reliability, the volume and weight of the insulating tape 3 are reduced, and the electrochemical apparatus This can contribute to improving energy density.
[0028] Specifically, the area A of the first adhesive region 31 and the area B of the second adhesive region 32 are equal to 0.08 ≤ B. The condition / A ≤ 0.965 is satisfied. In a specific example, 0.1 ≤ B / A ≤ 0.6. For example, B / A is specifically 0.1, 0.3, 0.4, 0.6, 0.8, 0.9. Anything is fine.
[0029] In this embodiment, if B / A is too large (for example, greater than 0.965), the first contact This indicates that the area A of the bonding region 31 and the area B of the second bonding region 32 are close, therefore the first bonding The peeling force per unit area between the edge of region 31 and the electrode assembly 2 cannot be effectively reduced, and There is a relatively high risk that the edge tape 3 will break the aluminum foil of the electrode assembly 2, and the electrode assembly The safety of body 2 is reduced, and the weight and volume of insulating tape 3 become too large, causing electrochemical damage. The energy density of the device decreases. The B / A ratio is too small (e.g., less than 0.08). In other words, if the area B of the second adhesive region 32 is too small, the space between the insulating tape 3 and the case 1 will be affected. The peeling force per unit area increases, reducing connection reliability.
[0030] More specifically, as shown in Figures 1-6, the first adhesive region 31 has a first outer edge 311, The second adhesive region 32 has a second outer edge 321. More specifically, as shown in Figures 4-6. The distance between the orthographic projection of the second outer edge 321 on the first surface and the first outer edge 311 is h. The width of the first bonding region 31 is W2, where 0.035 × W2 ≤ h ≤ 0.4 × W2 In a specific example, 0.05 × W² ≤ h ≤ 0.35 × W². For example, h may be 0.2 × W², 0.3 × W², etc. That is, the second outer edge 321 There is a misalignment between the orthographic projection on the first surface and the first outer edge 311. Then, on one of the four sides of the insulating tape 3, the above-mentioned misalignment (as shown in Figure 4) occurs. ) may exist, and on the two opposing sides, the above positional misalignment (as shown in Figure 5) It may exist, and the above-mentioned misalignment (as shown in Figure 6) exists on all four sides. You may do so.
[0031] In this embodiment, if h is too large, the area of the second bonding region 32 and the first bonding region 31 The difference in area is too large, that is, the surface area of the adhesive surface between the insulating tape 3 and the case 1. This indicates that the product is too small, resulting in peeling per unit area between insulating tape 3 and case 1. The force is too great, resulting in poor connection reliability between insulating tape 3 and case 1. If it's too small, the difference between the area of the second bonding region 32 and the area of the first bonding region 31 will be too small. In other words, the area of the first adhesive region 31 that extends beyond the edge of the second adhesive region 32 is too small. This indicates that the stress transmitted from the edge of the second bonding region 32 to the edge of the first bonding region 31 is The area of contact is too small, that is, the edge of the first adhesive region 31 of the insulating tape 3 and the electrode assembly The peeling force per unit area between 2 and the electrode assembly is too large, causing the insulating tape 3 to... The aluminum foil of body 2 is easily torn, and the volume of insulating tape 3 is too large, causing electrification. The energy density of the scientific device is reduced. Therefore, 0.035 × W² ≤ h ≤ 0.4 × W² Therefore, the area of the first adhesive region 31 and the area of the second adhesive region 32 are appropriate, so insulation In both the space between tape 3 and case 1 and the space between insulating tape 3 and electrode assembly 2, It offers high connection reliability and can improve the energy density of electrochemical devices. .
[0032] A drop test was conducted using a lithium-ion battery, whose maximum projection surface is rectangular, as an example, and it passed the drop test. Compare the rates. Here, Group 1 has the structure shown in Figure 4, and the width direction of the insulating tape 3 The above positional misalignment exists on one side. Group 2 has the structure shown in Figure 5, and the width of the insulating tape 3 The above positional misalignment exists on both sides of the direction. Group 3 has the structure shown in Figure 6, and the insulating tape All positional misalignments exist around 3. In the base group, the first adhesive region 31 and The shape and size of the second bonding area 32 are the same. The experiment was repeated 20 times at each location, and the pass rate was 80% or higher (i.e., less The condition is that all 16 electrochemical devices will not malfunction in the event of a fall. Group 1 is a fall on one side, Group 2 is a fall on both opposing sides, and Group 3 This is a fall of six faces and four corners. Here, a selected rectangular lithium-ion battery The electrode assembly 2 has a length L1 of 87 mm and a width W1 of 64 mm, and the first bonding area 3 The length L2 of part 1 is 60 mm, and the width W2 is 42 mm. The test results are shown in the table below.
[0033] [Table 1]
[0034] As can be seen from the test results in the table above, the area A of the first bonding region and the surface of the second bonding region After installing insulating tape 3 such that product B satisfies 0.08 ≤ B / A ≤ 0.965, electrochemical device When the fall test was conducted, all of the results showed a relatively high pass rate, and 0.05 × W² ≤ h If the value is ≤0.35 × W2, the pass rate is higher (≥90%).
[0035] In one specific embodiment, as shown in Figures 4 to 6, the electrode assembly 2 is connected to the insulating tape 3 It has a third surface 21 that adheres to the electrode assembly 2, that is, the third surface 21 of the electrode assembly 2 is an insulating tape It adheres to the first adhesive region 31 of part 3, where the first adhesive region 31 adheres to the second adhesive region 32 This covers the orthographic projection on the third surface 21.
[0036] In this embodiment, the first adhesive region 31 is directly attached to the third surface 21 of the second adhesive region 32. When the shadow is covered, the external force transmitted from the second adhesive area 32 is completely blocked by the insulating tape 3. The signal is transmitted to the first bonding region 31, thereby reaching the third surface 21 of the electrode assembly 2. This transmits and reduces the risk of the insulating tape 3 cracking under the action of external forces, and strengthens the structural strength of the insulating tape 3. Furthermore, it is possible to improve the service life and enhance the reliability of the connection between case 1 and electrode assembly 2. Cut.
[0037] Specifically, as shown in Figure 7, the length of the third surface 21 of the electrode assembly 2 is L1. Furthermore, along the width direction of the electrochemical apparatus, the first bonding region 31 has a first axis 312, The third surface 21 has a second axis 211, and the first axis 312 and the second axis 211 These are all axes along the width direction of the electrochemical apparatus, and in the embodiment shown in Figure 7, Along the longitudinal direction of the electrochemical apparatus, the first bonding region 31 is relative to the first axis 312. It is symmetric, and the third surface 21 is symmetric with respect to the second axis 211. The distance between the orthographic projection of axis 312 on the third surface 21 and the second axis 211 is D. Here, D may be 0, or, depending on the circumstances, there may be a difference between D and L1 such that D ≤ It may also satisfy 0.1 × L1. For example, D could be 0.05L1, 0.06L1, etc. This may also be done. Furthermore, as shown in Figure 7, the insulating tape may be placed along the length of the electrochemical apparatus. The first bonding region 31 of 3 has a third axis 313, and the third surface 21 has a fourth axis 212 The third axis 313 and the fourth axis 212 are both connected to the electrochemical apparatus. The axis is along the length direction, and in the embodiment shown in Figure 7, in the width direction of the electrochemical apparatus. Accordingly, the first bonding region 31 is symmetrical with respect to the third axis 313, and the third The surface 21 is symmetrical with respect to the fourth axis 212. In this embodiment, the third axis The distance between the orthographic projection of line 313 on the third surface 21 and the fourth axis 212 is E, and here Therefore, E may be 0, or, depending on the circumstances, there may be a relationship between E and W1 such that E ≤ 0 It may satisfy the condition 0.15 × W1.
[0038] Here, the connection reliability between the insulating tape 3 and the electrode assembly 2 is improved, and the insulating tape As long as the risk of breakage at the edge between part 3 and electrode assembly 2 can be reduced, between D and L1 The distances, including the distance between E and W1, may be set according to the actual circumstances.
[0039] In this embodiment, the weight at each part of the electrode assembly 2 is not uniform, and the insulating tape The connection reliability between the loop 3 and the electrode assembly 2 is affected by the gravity of the electrode assembly 2, therefore, If the weight of the pole assembly 2 is not uniform, the position of the insulating tape 3 on the third surface 21 will change. This reduces the connection reliability between the insulating tape 3 and the electrode assembly 2. The impact can be reduced.
[0040] In one possible design, as shown in Figures 4-7, the first geometric center of the second bonding region 32 The orthographic projection on the surface coincides with the geometric center of the first bonding region 31. In another possible design, From the geometric center of the first bonding region 31 and the geometric center of the second bonding region 32, along the same direction The ratio of the distance extending to the first outer edge 311 and the distance extending to the second outer edge 321 is The values are the same.
[0041] In this embodiment, the orthographic projection of the geometric center of the second bonding region 32 on the first surface is the first bonding region Because it coincides with the geometric center of the adhesion region 31, the geometric center of the second adhesion region 32 and the first adhesion region The geometric center of region 31 is located on the same straight line, and thereby the insulating tape 3 is positioned in case 1 And after being bonded to the electrode assembly 2, the first bonded region 31 and the second bonded region 32 are relatively This provides uniform force, improving the structural strength of the insulating tape 3. At the same time, the first adhesive area... From the geometric center of 31 and the geometric center of the second bonding region 32, along the same direction, the first outer region The ratio of the distance extending to edge 311 to the distance extending to the second outer edge 321 is the same. The orthographic projection of the second bonding region 32 on the first surface is located in the middle of the first bonding region 31, This ensures uniformity of the force transmitted from the second bonding region 32 to the first bonding region 31. This improves the structural strength of the insulating tape 3 and the adhesive strength between the insulating tape 3 and the electrode assembly 2. It can be improved.
[0042] In each of the above embodiments, as shown in Figure 7, the electrode assembly 2 is bonded to the insulating tape 3. It has a third surface 21, the length of the third surface 21 is L1 and the width is W1, The length of the first adhesive region 31 used to bond the insulating tape 3 to the electrode assembly 2. The depth is L2 and the width is W2, where 0.4 × L1 ≤ L2 ≤ 0.8 × L1 and 0.4 × W 1 ≤ W2 ≤ 0.8 × W1. For example, L2 is specifically 0.4 × L1, 0.5 × L 1. It could be 0.7 × L1, 0.8 × L1, etc., and W2 could be specifically 0.4 × W1 0.6×W1, 0.7×W1, 0.8×W1, etc. are also acceptable.
[0043] Here, the relationship between L1 and L2, and W1 and W2 is not limited to the above, and the insulation... This improves the connection reliability between the link 3 and the electrode assembly 2, and also prevents the electrode assembly 2 from being torn. They may be installed as needed, depending on the circumstances, as long as it prevents them from being installed.
[0044] In a specific embodiment of the first type, as shown in Figure 1, the insulating tape 3 has an integrated structure Even if the insulating tape 3 has a first adhesive area that differs in area due to processing methods such as cutting, Region 31 and the second adhesive region 32 can be formed. In this embodiment, the integration The insulating tape 3 has the advantages of a simple structure and high strength.
[0045] In a specific embodiment of the second type, as shown in Figure 2, the insulating tape 3 has a segmented structure This may also be the case, that is, it may include two tape units, and both tape units may be double-sided tapes. This causes one surface of the two tape units to adhere to each other, and the other surface... Each surface is used to bond the case 1 and the electrode assembly 2, respectively. In this embodiment, The insulating tape 3, which has this segmented structure, has the advantages of being simple in structure and easy to process. Furthermore, the first adhesive region 31 and the second adhesive region 32 of the insulating tape 3 have different adhesive strengths. This makes it possible to conveniently achieve this.
[0046] In a specific embodiment of the third type, as shown in Figure 3, the insulating tape 3 is constructed by laminating It includes a first adhesive member 33, a base material 35, and a second adhesive member 34. Here, the base material 3 5 is located between the first adhesive member 33 and the second adhesive member 34 and connects to both of them. The first adhesive member 33 is used to bond to the electrode assembly 2. The adhesion area 31 is installed on the first adhesive member 33. The second adhesive member 34 is in case 1 It is used to bond to the second adhesive member 3. That is, the second adhesive region 32 is used to bond to the second adhesive member 3. It will be installed at location 4.
[0047] Here, as shown in Figure 3, the area of the first adhesive member 33 is the surface area of the second adhesive member 34. Larger than the area, the size of the base material 35 is the surface of the first adhesive member 33 which has a relatively large area. It is the same as the product. Between the first adhesive member 33 and the base material 35, the second may be bonded. Adhesion may also be applied between the adhesive member 34 and the base material 35.
[0048] In this embodiment, the base material 35 included in the insulating tape 3 is a first adhesive member 33 and a second Since it can play a supporting role to the adhesive member 34, the structural strength of the insulating tape 3 This improves the degree of resistance and further reduces the risk of the insulating tape 3 breaking under the action of external forces, and the case 1 and the electrical The adhesive reliability between the pole assembly 2 and the other part can be improved. The insulating tape 3 has the advantages of having a simple structure and being easy to process. Because part 3 has a segmented structure, the first adhesive area 31 and the second adhesive area of the insulating tape 3 It is possible to conveniently achieve different adhesive strengths for region 32.
[0049] In each of the above embodiments, as shown in Figure 8, the first adhesive area of the insulating tape 3 The shape of region 31 and the second bonding region 32 may be a square, rectangle, trapezoid, octagon, circle, or ellipse. It is one of the following groups, selected from among them.
[0050] The electrochemical apparatus in the embodiment of the present invention can be used in multiple fields. Any device that can supply electricity can employ the electrochemical apparatus in the embodiment of the present invention. This can be done. For example, the electrochemical device is an electrochemical device kit and electronic device for electric vehicles. Used in components such as those found in electronic devices. Examples include mobile phones and tablet computers. Computers, desktop computers, laptop computers, handheld computers Computers, notebook computers, and ultra-mobile personal computers Wireless computers (UMPCs), netbooks, and cellular mobile wireless phones (cellular ph one), personal digital assistant (PDA), expansion Augmented reality (AR) devices, virtual reality (VR) devices, artificial intelligence Artificial intelligence (AI) devices, wearable devices, in-car devices, smartphones Home equipment and / or smart city equipment, power tools, energy storage devices, electric tricycles, It may also be an electric vehicle. In the embodiments of the present invention, the specific type of the electronic device is There are no special restrictions.
[0051] Specifically, the electronic equipment in question includes cases, screens, circuit boards, and electrochemical devices, etc. Components may be included. Here, the screen, circuit board, and electrochemical apparatus are all cases. The electrochemical apparatus is installed in the location described in any of the above embodiments.
[0052] The above descriptions are merely preferred embodiments of the present invention and do not limit the present invention. There is no such thing. For those skilled in the art, the present invention can be modified and altered in various ways. Any modifications, equivalent substitutions, or improvements made within the scope of the purpose and principles are not included within the scope of protection of this application. It should be born.
Claims
1. The case and An electrode assembly in which at least a portion is located inside the case, An insulating tape having a first surface that adheres to the electrode assembly and a second surface that adheres to the case, and positioned between the case and the electrode assembly, Includes, The first surface includes a first bonding region, and the second surface includes a second bonding region. The first adhesive region has a first outer edge, the second adhesive region has a second outer edge, and the first outer edge is further from the center of the insulating tape than the second outer edge. On the same side in the first direction which is the width direction with respect to the center of the insulating tape, the distance between the orthographic projection of the second outer edge on the first surface and the first outer edge is h, the width of the first surface in the first direction is W2, and 0.035 × W2 ≤ h ≤ 0.4 × W2, The electrode assembly has a third surface that adheres to the first surface of the insulating tape, and the first adhesive region completely covers the orthographic projection of the second adhesive region on the third surface. The length of the third surface is L1, the length of the first adhesive region is L2, and 0.4 × L1 ≤ L2 ≤ 0.8 × L1, An electrochemical apparatus characterized in that the width of the third surface is W1 and 0.4 × W1 ≤ W2 ≤ 0.8 × W1.
2. The electrochemical apparatus according to claim 1, characterized in that the area A of the first adhesive region and the area B of the second adhesive region satisfy 0.08 ≤ B / A ≤ 0.
965.
3. a) 0.15≦B / A≦0.85; b) The electrochemical apparatus according to claim 2, characterized in that at least one of the following conditions is met: 0.05 × W² ≤ h ≤ 0.35 × W².
4. The electrochemical apparatus according to claim 1, characterized in that, along the width direction of the electrochemical apparatus, the first bonding region has a first axis, the third surface has a second axis, and the distance between the orthographic projection of the first axis on the third surface and the second axis is D, and D ≤ 0.1 × L1.
5. The electrochemical apparatus according to claim 1, characterized in that, along the longitudinal direction of the electrochemical apparatus, the first bonding region has a third axis, the third surface has a fourth axis, and the distance between the orthographic projection of the third axis on the third surface and the fourth axis is E, and E ≤ 0.1 × W1.
6. The electrochemical apparatus according to claim 1, characterized in that the orthographic projection of the geometric center of the second bonding region on the first surface coincides with the geometric center of the first bonding region.
7. The electrochemical apparatus according to claim 1, characterized in that the insulating tape includes a first adhesive member, a base material, and a second adhesive member, which are installed in a laminated manner, the first adhesive member adheres to the electrode assembly, and the second adhesive member adheres to the case.
8. The electrochemical apparatus according to claim 1, characterized in that the shapes of the first adhesive region and the second adhesive region are selected from the group consisting of square, rectangle, trapezoid, octagon, circle, and ellipse.
9. An electronic device characterized by including an electrochemical apparatus as described in any one of claims 1 to 8.