Cells, batteries, electrical equipment, and methods for bonding insulators

Abstract

To provide a cell, a battery, electrical equipment, and an insulator adhesion method.SOLUTION: A cell contains: an electrode assembly; a pin; a first insulator; and a second insulator 15. The electrode assembly contains a tab. A connector contains: a post terminal connection part 131; and a tab connection part 132. The post terminal connection part is connected to a post terminal 122 of the cell, and the tab connection part is connected to the tab. The first insulator at least partially coats a front surface that is near the electrode assembly of the tab connection part. The second insulator at least partially coats the post terminal connection part. At least one of the first insulator and the second insulator contains an adhesion region 141 and a non-adhesion region 142. The non-adhesion region of one insulator of the first insulator and the second insulator at least partially overlaps with the other insulator of the first insulator and the second insulator so as to form an overlapping region.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to the field of batteries, and particularly to cells, batteries, electrical devices, and insulator bonding methods.

Background Art

[0002] In recent years, new energy vehicles have become a new trend in the automotive industry, and the number of consumers using them has been increasing. As a power source for new energy vehicles, a power battery pack is widely used in the field of new energy vehicles. In conventional batteries, the inside of the positive and negative pins of the cell contacts the electrode assembly of the battery, which is likely to cause a short circuit. Therefore, generally, an insulator is attached to the inside of the positive and negative pins of the cell for insulation protection. However, the conventional bonding of the insulator is not easy, the bonding effect is inferior, and there is a risk of short circuit.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above-mentioned drawbacks in the present technical field, the object of the present invention is to improve the problems of the conventional insulator, such as the difficulty in bonding the insulator, the inferior bonding effect between the insulator and the pin, as a result, there is a possibility of forming a large gap and a risk of short circuit, and the adhesive is exposed in a partial area of the insulator corresponding to the pin, and there is a risk of partial peeling due to the decrease in the adhesive force of the adhesive layer, and to provide a cell, a battery, an electrical device, and an insulator bonding method.

Means for Solving the Problems

[0004] To achieve the above object and other related objects, a first aspect of the present invention provides a cell, which includes an electrode assembly, a connector, a first insulator, and a second insulator. The electrode assembly includes tabs. connectorIt includes a post terminal connector and a tab connector. The post terminal connector and the tab connector are located in different horizontal planes, the post terminal connector is connected to the post terminal of the cell, and the tab connector is connected to the tab. The first insulator covers at least partially the surface of the tab connector that is close to the electrode assembly. The second insulator covers at least partially the post terminal connector. At least one of the first and second insulators includes an adhesive region and a non-adhesive region, and the non-adhesive region of one of the insulators, the first and second insulators... and, The first insulator and the other insulator of the second insulator but At least partially overlapping, Having an overlapping region .

[0005] In one embodiment of the present invention, the first insulator is The first bonding region Adhesive and non-adhesive areas The first non-adhesive region and First The non-adhesive area at least partially covers the post terminal connection, and the second insulator The second superimposed region has at least partially overlapping with the first non-adherent region. , or the second insulator is the adhesive area The second bonding region and non-adhesive area The second non-adhesive region and Second The non-adhesive area at least partially covers the tab connection portion, and the first insulator The first superimposed region has at least partially overlapping with the second non-adherent region. .

[0006] In one embodiment of the present invention, the first insulator First Adhesion area and First If it includes a non-adhesive region, the second insulator is First At least partially located on the surface far from the post terminal connection in the non-adhesive area. This forms a second superposition region. The second insulator Second Adhesion area and Second If it includes a non-adhesive region, the first insulator is Second At least partially placed on the surface far from the tab connection in the non-adhesive area. This forms the first superimposed region. ru.

[0007] In one embodiment of the present invention, The first insulator includes a first adhesive region and a first non-adhesive region, and the second insulator includes a second adhesive region and a second non-adhesive region. , the first insulator First Non-adhesive area is the 2 insulators Second Non-adhesive area and but At least partially overlap , having an overlapping region 。

[0008] In one embodiment of the present invention, the overlapping region is fixedly connected by a third insulator or an adhesive.

[0009] In one embodiment of the present invention, the length of the non-adhesive region is a, the length of the shorter one of the first insulator and the second insulator is b, the width of the overlapping region is W, and the formula a / 2 ≤ W ≤ b / 2 is satisfied.

[0010] In one embodiment of the present invention, when the first insulator First includes an adhesive region and First a non-adhesive region, First the boundary line between the adhesive region and First the non-adhesive region is located in the region corresponding to the tab connection portion of the first insulator. When the second insulator [[ID=2二十二]] Second includes an adhesive region and Second a non-adhesive region, Second the boundary line between the adhesive region and [[ID=二十八]] Second the non-adhesive region is located in the region corresponding to the post terminal connection portion of the second insulator.

[0011] In one embodiment of the present invention, the connector Between the post terminal connection and the tab connection further has a bending portion ru.

[0012] In one embodiment of the present invention, the non-adhesive region at least part of further includes a thinning region, 1 and the thinning region is located in the portion corresponding to the bending portion of the non-adhesive region. 1 In one embodiment of the present invention, the thickness of the thinning region is c,

[0013] and assuming that the thickness of the region excluding the thinning region of the first insulator Having a first thinning region and the second insulator or at least one of the is d, the formula 0 < c ≤ d / 2 is satisfied. 1 In one embodiment of the present invention, the width of the thinning region is L, the radius of the bending portion is R, and the formula R < L < ۲R is satisfied.

[0014] In one embodiment of the present invention, the width of the thinning region is L, the radius of the bending portion is R, and the formula R < L < ۲R is satisfied.

[0015] In one embodiment of the present invention, The pre-bent portion is in the non-adhesive area corresponding to the bent portion. is provided.

[0016] In one embodiment of the present invention, At least one of the first insulator and the second insulator has other portions adjacent to the pre-bent portion, the other portion includes a second thinning region at the connection with the pre-bent portion, and the thickness of the second thinning region is is less than the thickness of the other portions excluding the pre-bending portion, or the thickness of the pre-bending portion is less than the thickness of the other portions excluding the pre-bending portion.

[0017] In one embodiment of the present invention, The connecting part Two ends of the pre-bending portion Department The distance is 0.7 times or more of the length of the bending portion.

[0018] In one embodiment of the present invention, connector Along the width direction of, the connecting portion 2nd A thinning region is multiple provided, 2nd The thickness of the thinning region is 2nd Less than the thickness of the other portions excluding the thinning region.

[0019] In one embodiment of the present invention, a first groove is provided in the tab connection portion, the first groove extends from one end far from the bending portion of the tab connection portion toward the other end close to the bending portion, and the length of the first groove is less than the length of the tab connection portion.

[0020] In one embodiment of the present invention, on one side far from the first insulator of the tab connection portion Pressing area is provided, Pressing area is provided along the circumferential direction of the first groove.

[0021] In one embodiment of the present invention, a second groove is provided in the first insulator, and when the first insulator covers the tab connection portion, the second groove corresponds to the first groove.

[0022] The present invention further provides a battery including the cell described in any of the above embodiments.

[0023] The present invention further provides an electrical device including the cell described in any of the above embodiments.

[0024] Another aspect of the present invention provides an insulating bonding method comprising a first step of bonding a first insulator having an adhesive region and a non-adhesive region to a cell connector, and a second step of bonding a second insulator to a cell connector, wherein at least a portion of the second insulator is bonded to the non-adhesive region of the first insulator.

[0025] The first step further includes a molding step, and the molding step is , the 1. The adhesive area of ​​the insulator The steps include: bonding the tab connection portion of a connector that has a bend between the tab connection portion and the post terminal connection portion; The non-adhesive region of the first insulator connector By spreading it along the curved part, First insulator Non-adhesive area Connector It is attached to the bent part, connector This includes being at least partially bonded to the post terminal connection portion.

[0026] Furthermore, the non-adhesive area is connector The external structure presses down to ensure that the material is spread evenly and bonded together. [Effects of the Invention]

[0027] The present invention provides a cell, a battery, and an electrical device, wherein the first insulator and / or the second insulator are provided with an adhesive region and a non-adhesive region. The adhesive region of the first insulator and / or the second insulator does not cover the bend, while the non-adhesive region of one of the insulators covers the bend and at least partially overlaps with the other insulator. Therefore, the insulator is not affected by adhesion at the bend, making bonding to the bend easier, reducing the difficulty of bonding the insulator to the connector, and improving the bonding effect.

[0028] The present invention provides a cell, a battery, and an electrical device, wherein the first insulator and / or the second insulator are provided with an adhesive region and a non-adhesive region, and the first and second insulators overlap each other at least partially to form an overlapping region. Thus, it is possible to further improve the bonding effect, prevent the formation of large gaps at the connector bending portion and the exposure of metal due to metal shavings and burrs at the exposed portion. The second insulator partially covers the first insulator to form an overlapping region, which prevents the risk of partial delamination of the insulator and thus prevents the risk of short-circuiting the cell.

[0029] The present invention provides cells, batteries, and electrical devices, wherein a thin-walled region or pre-bent region is provided in the portion corresponding to the bent portion of the non-adhesive area, thereby facilitating the bending of the insulator, reducing the difficulty of bonding, and improving the bonding effect.

[0030] The present invention provides an insulator bonding method, wherein a first insulator is provided with an adhesive region and a non-adhesive region, and at least a portion of the adhesive region of a second insulator is bonded to the non-adhesive region of the first insulator. A molding step is performed to improve the bonding of the insulator to the cell connector in order to reduce the risk of gap formation during bonding between the insulator and the cell connector, and thus prevent the risk of short-circuiting the cell. [Brief explanation of the drawing]

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings necessary for describing the embodiments are briefly described below. Naturally, the drawings described below are merely illustrative of some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these without any creative effort.

[0032] [Figure 1] This is a structural diagram of a cell according to several embodiments of the present invention. [Figure 2] This is a cross-sectional view of the cell structure according to several embodiments of the present invention. [Figure 3] This is a schematic diagram of a connector and cover plate assembly with an insulator bonded to it according to several embodiments of the present invention. [Figure 4] This is a partial schematic diagram of a connector and cover plate assembly with an insulator bonded to it according to some embodiments of the present invention. [Figure 5] This is a top view of a connector and cover plate assembly with an insulator bonded to it, according to some embodiments of the present invention. [Figure 6] This is a structural cross-sectional view along line AA in Figure 5. [Figure 7] This is an enlarged view of the structure at point B in Figure 6. [Figure 8] This is a schematic diagram of a first insulator according to several embodiments of the present invention. [Figure 9] This is a partial schematic diagram of a connector and cover plate assembly with an insulator bonded to it according to another embodiment of the present invention. [Figure 10] This is a partial schematic diagram of a connector and cover plate assembly with an insulator bonded to it, according to yet another embodiment of the present invention. [Figure 11] This is a schematic diagram showing the bonding of the first insulator according to several embodiments of the present invention. [Figure 12] This is a schematic diagram after the first insulator in Figure 11 has been bonded. [Figure 13] Figure 12 is a schematic diagram showing the process of bonding the second insulator. [Figure 14] This is a structural diagram of a connector according to another embodiment of the present invention. [Figure 15] This is a structural diagram of a first insulator according to another embodiment of the present invention. [Modes for carrying out the invention]

[0033] Embodiments of the present invention will be described based on specific examples, but those skilled in the art will readily understand other advantages and effects of the present invention based on the content disclosed herein. The present invention may be further carried out or applied based on other different specific embodiments, and various details herein may be modified or changed based on different viewpoints and applications without departing from the spirit of the invention.

[0034] The drawings accompanying the embodiments schematically illustrate the basic concepts of the present invention and show only the components related to the present invention, and do not depict the actual number, shape, dimensions, etc. of the components in actual implementation. The shape, number, and ratio of each component in actual implementation may be arbitrarily changed, and the arrangement of the components may be more complex.

[0035] Referring to Figures 1 to 15, in conventional batteries, the insides of the positive and negative electrode pins of the cell are directly connected to the battery's electrode assembly, which is prone to short circuits. Due to the limitation that the insides of the positive and negative electrode pins are transition regions, conventional battery cells do not provide protection, and the metal inside the positive and negative electrode pins is exposed. The exposed metal can cause short circuits between the connector and the battery's electrode assembly. Existing solutions generally involve attaching insulators to the insides of the positive and negative electrode pins for insulating protection, but conventional insulator bonding is difficult, and the bonding effect between the insulator and the pins is poor. As a result, large gaps are formed, and there is a risk of short circuits. In addition, there is a risk that the adhesive will be exposed in the partial area of ​​the insulator corresponding to the pins, reducing the tackiness of the adhesive layer and causing partial delamination. Therefore, the present invention provides a cell, battery, electrical equipment, and an insulating bonding method that improve upon the problems of conventional insulatings, namely that bonding is difficult, the bonding effect is poor in the region corresponding to the connector bending portion of the insulating material, resulting in the possibility of large gaps being formed and the risk of short circuits occurring, and that there is a risk of partial peeling due to the adhesive being exposed in the region corresponding to the connector bending portion of the insulating material and a decrease in the adhesive strength of the adhesive layer. In particular, the cell 10 includes an electrode assembly 11, a cover plate assembly 12, a connector 13, a first insulating material 14, and a second insulating material 15. The electrode assembly 11 includes a main body 111 and tabs 112 extending from the main body 111. For example, the tabs 112 are located on two sides of the main body 111. The cover plate assembly 12 includes a cover plate body 121 and post terminals 122 provided on the cover plate body 121. The connector 13 is electrically connected to the post terminal 122 and the tab 112, respectively, and the first insulator 14 and the second insulator 15 cover the connector 13 for insulating protection. Naturally, in some other embodiments, the post terminal 122 may be located in other parts of the cell, such as the cell housing.

[0036] Referring to Figures 1 to 4, in this embodiment, the connector 13 includes a post terminal connection portion 131, a tab connection portion 132, and a bent portion 133. The post terminal connection portion 131 is connected to the tab connection portion 132 via the bent portion 133. That is, the post terminal connection portion 131 and the tab connection portion 132 are located in different horizontal planes. The post terminal connection portion 131 is electrically connected to the post terminal 122. For example, the post terminal connection portion 131 is welded to the post terminal 122. The tab connection portion 132 is electrically connected to the tab 112. Specifically, after the connector 13 is connected to the cover plate assembly 12, the connector 13 is bent to form the bent portion 133 and extends away from the cover plate body 121 of the cover plate assembly 12 to form the connection portion 132. In this embodiment, the bent portion 133 corresponds to the position of the edge of the electrode assembly 11. The edge refers to the intersection line between the upper surface and the left or right surface of the electrode assembly 11, with the upper surface being the side of the electrode assembly 11 closest to the lower surface of the cover plate assembly 12.

[0037] Referring to Figures 1 to 4 and Figure 8, in this embodiment, the first insulator 14 at least partially covers the surface of the tab connection portion 132 near the electrode assembly 11, and the second insulator 15 at least partially covers the post terminal connection portion 131. At least one of the first insulator 14 and the second insulator 15 includes an adhesive region and a non-adhesive region, and the non-adhesive region of at least one of the insulators of the first insulator 14 and the second insulator 15 at least partially overlaps with the other insulator to form an overlapping region. For example, if the first insulator 14 includes an adhesive region 141 and a non-adhesive region 142, the adhesive region 141 at least covers the surface of the tab connection portion 132 near the electrode assembly 11, for example, covering the surface of the tab connection portion 132 near the main body 111. The non-adhesive region 142 covers the bent portion 133, and the non-adhesive region 142 at least partially covers the surface of the post terminal connection portion 131 far from the post terminal 122. Therefore, the exposed metal portion of the connector 13 is prevented from short-circuiting with the electrode assembly 11, improving safety during the use of the cell 10. Furthermore, the portion of the metal of the connector 13 covered by the first insulator 14 is prevented from corroding by air, improving the service life of the connector 13 and thus improving the overall reliability during the use of the cell 10. The boundary line 1401 between the adhesive area 141 and the non-adhesive area 142 of the first insulator 14 is located in the area corresponding to the tab connection portion 132 of the first insulator 14. That is, when the first insulator 14 covers the connector 13, the adhesive area 141 avoids the bending area of ​​the connector 13 and is positioned on the surface of the tab connection portion 132 of the connector 13. Therefore, it is possible to avoid the adhesive being placed in the bending area and affecting the adhesion of the first insulator 14, thereby reducing the difficulty of bonding the first insulator 14 and improving the bonding effect.

[0038] Referring to Figures 1 to 4 and Figure 8, in conventional bonding of an insulator to a pin, the bonding effect in the region of the first insulator corresponding to the connector bend is poor, resulting in a large gap. As a result, the adhesive is exposed in the region of the first insulator corresponding to the connector bend, and there is a high possibility that metal fragments and welding burrs generated by connector welding will adhere to it, creating a risk of metal fragments falling off. In addition, after immersion of the electrodes, there is a risk that the adhesive strength of the adhesive layer will decrease in the exposed adhesive region, creating a risk of partial delamination of the insulator. For this reason, in this embodiment, the second insulator 15 covers the post terminal connection portion 131 and at least partially overlaps with the non-adhesive region 142 of the first insulator 14 to form an overlapping region. Specifically, the second insulator 15 at least partially covers the surface of the non-adhesive region 142 that is far from the post terminal connection portion 131 so as to form an overlapping region in the non-adhesive region 142 of the second insulator 15. Therefore, the bonding effect is further improved, preventing metal exposure due to the formation of large gaps at the connector bending portion, preventing the risk of cutting by metal shavings and burrs at the exposed portion, preventing the risk of partial delamination of the insulator, and thus preventing the risk of short circuit of the cell. The first insulator 14 and the second insulator 15 are adhesive tapes, but are not limited to adhesive tapes. The electrode assembly 11 has a box structure and is connected to the positive electrode tab and negative electrode tab of the electrode assembly 11. connector Each of the elements 13 is provided with a first insulator 14 and a second insulator 15, and the electrode assembly 11 may specifically be a laminated and / or wound structure.

[0039] In some other embodiments, it is also possible to configure only the second insulator 15 to include an adhesive region and a non-adhesive region. The adhesive region covers the post terminal connection portion 131, the non-adhesive region partially covers the tab connection portion 132, and the first insulator 14 at least partially overlaps the non-adhesive region to form an overlapping region. For example, the first insulator 14 at least partially covers the surface of the non-adhesive region that is far from the tab connection portion 132 to form an overlapping region. In this case, the boundary line between the adhesive region and the non-adhesive region is located in the region of the second insulator 15 corresponding to the post terminal connection portion 131. That is, when the second insulator 15 covers the connector 13, the adhesive region avoids the bending region of the connector 13 and is located on the surface of the post terminal connection portion 131 of the connector 13. In other embodiments, the first insulator 14 and the second insulator 15 may both include an adhesive region and a non-adhesive region, the non-adhesive region of the first insulator 14 at least partially overlapping with the non-adhesive region of the second insulator 15 to form an overlapping region, the overlapping region being fixedly connected by a third insulator or adhesive.

[0040] Referring to Figures 4 to 7, in this embodiment, the length of the non-adhesive region 142 of the first insulator 14 and / or the second insulator 15 is a, the length of the shorter of the first insulator 14 and the second insulator 15 is b, and the width of the overlapping region of the first insulator 14 and the second insulator 15 is W, satisfying the formula a / 2 ≤ W ≤ b / 2. Therefore, the overlapping region is not too small, and no equipment improvements are required to improve the alignment accuracy of the adhesive fasteners, or the overlapping region is not too large, and does not result in an excessively large non-adhesive region that causes the insulator to detach due to its own weight and affects the insulation performance. Taking the first insulator 14 as an example, the non-adhesive region of the first insulator 14 partially covers the second insulator 15, the length of the non-adhesive region of the first insulator 14 is a, the length of the second insulator 15 is b, and the width W of the overlapping region satisfies the above formula.

[0041] Referring to FIGS. 8 and 9, since the first insulator 14 and / or the second insulator 15 have a specific hardness, it is difficult to maintain their bent state, and there is a certain degree of operational difficulty in the bonding process. Therefore, in the present embodiment, a first thinning region 143 is provided in the first insulator 14 and / or the second insulator 15. The first thinning region 143 is located at a portion corresponding to the bent portion 133 of the non-bonding region 142 of the first insulator 14 and / or the second insulator 15. That is, the first thinning region 143 is located within the non-bonding region and corresponds to the bent portion 133 of the connector 13. Therefore, the first insulator 14 or the second insulator 15 can be bent more easily, and the bent state of the first insulator 14 or the second insulator 15 can be maintained, thus reducing the bonding difficulty. In the present embodiment, the thickness of the first thinning region 143 is c, and the thickness of the region of the first insulator 14 and / or the second insulator 15 excluding the thinning region is d, satisfying the formula 0 < c ≤ d / 2. Further, the length of the first thinning region 143 is L, and the radius of the bent portion 133 is R, satisfying the formula R < L < 2R. Therefore, when the first insulator 14 or the second insulator 15 is bent, it is possible to prevent the surface far from the connector 13 in the bent region from becoming wrinkled. Further, in some other embodiments, in order to further facilitate the bending of the first insulator 14 or the second insulator 15 and the maintenance of the bent state of the first insulator 14 or the second insulator 15, bending marks may be provided in advance in the first thinning region 143, thus reducing the bonding difficulty.

[0042] Referring to Figure 10, in some other embodiments, when the first insulator 14 and / or the second insulator 15 include an adhesive region and a non-adhesive region, a pre-bent portion 144 is provided in the insulator including the non-adhesive region of the first insulator 14 and / or the second insulator 15, and the pre-bent portion 144 corresponds to the bent portion 133. The following embodiments take as an example that the first insulator 14 includes an adhesive region 141 and a non-adhesive region 142. The pre-bent portion 144 is located in the portion of the non-adhesive region 142 that corresponds to the bent portion 133. That is, the pre-bent portion 144 is located within the non-adhesive region 142 and corresponds to the bent portion 133 of the connector 13. Therefore, it becomes easier to bend the first insulator 14 and maintain the bent state of the first insulator 14, thus reducing the difficulty of bonding. In this embodiment, the thickness of the connection portion between the pre-bent portion 144 and the other portion of the first insulator 14 excluding the pre-bent portion 144 is less than the thickness of the other portion of the first insulator 14 excluding the pre-bent portion 144. For example, the first insulator 14 is provided with a second thinning region 145, which is located at the joint between the post terminal connection portion 131 and the bent portion 133, and / or at the joint between the bent portion 133 and the tab connection portion 132, and extends along the width direction of the first insulator 14. This makes it possible to bend and install the first insulator 14. In some other embodiments, more thinning regions may be provided in the pre-bent portion 144, located between the second thinning region 145 at the joint between the post terminal connection portion 131 and the bent portion 133 and the second thinning region 145 at the joint between the bent portion 133 and the tab connection portion 132. Furthermore, in some other embodiments, the thickness of the pre-bent portion 144 may be configured to be less than the thickness of the other parts of the first insulator 14 excluding the pre-bent portion 144, in order to facilitate bending and bonding of the first insulator 14 while avoiding wrinkles on the surface of the pre-bent portion 144 away from the connector 13.

[0043] Referring to Figure 10, in some other embodiments, the distance between the two connections where the two ends of the pre-bent portion 144 connect to the other portion of the first insulator 14 excluding the pre-bent portion 144 is 0.7 times or more the length of the bent portion 133 in the connector 13, so that the pre-bent portion 144 can cover the main area of ​​the bent portion 133 and prevent wrinkles in the first insulator 14 when bonded to the bent portion 133. Furthermore, the distance between the two connections where the two ends of the pre-bent portion 144 connect to the other portion of the first insulator 14 excluding the pre-bent portion 144 is 1.3 times or less the length of the bent portion 133 in the connector 13.

[0044] Referring to Figure 10, in some other embodiments, a plurality of second thinning regions 145 are provided along the width direction of the connector 13 at the connection between the pre-bent portion 144 and the rest of the first insulator 14, and the thickness of the second thinning regions 145 is less than the thickness of the rest of the first insulator 14 excluding the second thinning regions 145. That is, the plurality of second thinning regions 145 are provided at intervals at the connection between the pre-bent portion 144 and the rest of the first insulator 14. Thus, the first insulator 14 is thinned to facilitate bending and bonding, and the overall structural strength can be improved to prevent the thinning regions from breaking due to tension on the first insulator 14 during the bonding process, thereby affecting the insulation performance. The first thinning regions 143 and the second thinning regions 145 are formed by locally pressing the non-bonded region 142 of the first insulator 14. The thickness of the first insulator 14 is locally reduced without degrading its insulating performance, in order to facilitate bending of the first insulator 14 and maintaining the bent state of the first insulator 14, thereby reducing the difficulty of bonding. Furthermore, if the second insulator 15 includes both a bonded region and a non-bonded region, it is also possible to provide a pre-bent portion and a second thinning region. The relationship and characteristics between the second insulator 15, the pre-bent portion, and the second thinning region are the same as or similar to the relationship and characteristics between the first insulator 14, the pre-bent portion 144, and the second thinning region 145 in the first insulator 14.

[0045] Referring to Figures 11 to 13 and Figure 3, in this embodiment, the first insulator 14 includes an adhesive region 141 and a non-adhesive region 142 as an example, and the process for bonding the insulator to the connector 13 is as follows.

[0046] In the first step, the first insulator 14 is bonded to the connector 13. Specifically, the bonding area 141 of the first insulator 14 is first bonded to the tab connection portion 132 of the connector 13.

[0047] In the second step, the non-adhesive area 142 of the first insulator 14 is spread uniformly along the bend 133 of the connector 13, the non-adhesive area 142 is bonded to the bend 133, and at least partially bonded to the post terminal connection portion 131 of the connector 13. The non-adhesive area 142 may be pressed by an external structure in order to spread uniformly and bond to the connector 13.

[0048] In the third step, the second insulator 15 is bonded to the post terminal connection portion 131 of the connector 13, at least partially covering the surface of the non-bonded region 142 of the first insulator 14 that is located on the post terminal connection portion 131, forming an overlapping region.

[0049] According to the above insulator bonding method, the second insulator 15 covers the post terminal connection portion 131 and at least partially covers the non-adhesive region 142 of the first insulator 14 to form an overlapping region. Specifically, the second insulator 15 at least partially covers the surface of the non-adhesive region 142 that is far from the post terminal connection portion 131 to form an overlapping region with the non-adhesive region 142 of the first insulator 14. Therefore, the bonding effect is further improved, preventing metal exposure due to the formation of large gaps at the connector bending portion, preventing the risk of cutting by metal shavings burrs at the exposed portion, preventing partial peeling of the insulator, and thus preventing the risk of short-circuiting of the cell.

[0050] Referring to Figures 14 and 15, in some other embodiments, a first groove 1321 is provided in the tab connector 132. The first groove 1321 extends from one end of the tab connector 132 far from the bend 133 to the other end near the bend 133, and the length of the first groove 1321 is less than the length of the tab connector 132 to facilitate connection with the tab 112. Furthermore, a thin-walled region 1322 is provided on one side of the tab connector 132 far from the first insulator 14. The thin-walled region 1322 is provided along the circumferential direction of the first groove 1321 and is formed by pressing a local region along the circumferential direction of the first groove 1321 in the tab connector 132 to improve the structural strength of the tab connector 132. Correspondingly, a second groove 146 is provided in the first insulator 14. When the first insulator 14 covers the tab connection portion 132, the second groove 146 corresponds to the first groove 1321 in order to improve adhesion of the tab connection portion 132.

[0051] Referring to Figures 1 to 5, this embodiment further provides a battery. The battery includes at least one cell 10 as described in the above embodiment. For example, an electrode assembly 11 within the cell 10 is connected to a connector 13. The first insulator 14 and the second insulator 15 cover the connector 13, preventing the exposed metal portion of the connector 13 from short-circuiting with the electrode assembly 11, thereby improving safety during the use of the cell 10 and reducing the risk of battery leakage. It also prevents the portion of the metal of the connector 13 covered by the first insulator 14 from corroding by air, improving the service life of the connector 13, improving the overall service life of the battery, and thus improving the overall reliability during the use of the ionization module. The battery module may be a battery module formed by a series or parallel connection of a plurality of cells, or a combination of a series and parallel connection of a plurality of cells. Alternatively, a plurality of such battery modules may be assembled to form a single battery pack, or the battery pack and battery module may be directly formed by assembling cells.

[0052] Referring to Figures 1 to 15, this embodiment further provides electrical equipment. The electrical equipment includes the cells described in the above embodiment. The electrical equipment may be, for example, equipment such as a vehicle or an energy storage cabinet.

[0053] The present invention provides a cell, a battery, and an electrical device, wherein the first insulator and / or the second insulator are provided with an adhesive region and a non-adhesive region. The adhesive region of the first insulator and / or the second insulator does not cover the bend, while the non-adhesive region of one of the insulators covers the bend and at least partially overlaps with the other insulator. Therefore, the insulator is not affected by adhesion at the bend, making bonding easier, reducing the difficulty of bonding the insulator to the connector, and improving the bonding effect.

[0054] The present invention provides a cell, a battery, and an electrical device, wherein the first insulator and / or the second insulator are provided with an adhesive region and a non-adhesive region, and the first and second insulators overlap each other at least partially to form an overlapping region. Thus, it is possible to further improve the bonding effect, prevent the formation of large gaps at the connector bending portion and the exposure of metal due to metal shavings and burrs at the exposed portion. The second insulator partially covers the first insulator to form an overlapping region, which prevents the risk of partial delamination of the insulator and thus prevents the risk of short-circuiting the cell.

[0055] The present invention provides cells, batteries, and electrical devices, wherein a thinned area or pre-bent area is provided in the portion corresponding to the bent portion of the non-adhesive area, thereby facilitating the bending of the insulator, reducing the difficulty of bonding, and improving the bonding effect.

[0056] The above description is merely illustrative of preferred embodiments and technical principles used in the present invention. Those skilled in the art will understand that the scope of the present invention is not limited to technical solutions formed by specific combinations of the above technical features, but also includes other technical solutions formed by any combination of the above technical features or equivalent features without departing from the concept of the present invention, such as technical solutions formed by replacing the above features with technical features having similar functions to those disclosed in the present invention (but not limited to those), etc.

[0057] Except for the technical features described herein, other technical features are known to those skilled in the art. To emphasize the innovative features of the present invention, other technical features are not described further here. [Industrial applicability]

[0058] The present invention provides a cell, battery, electrical equipment, and an insulator bonding method, which reduces the risk of gap formation when bonding an insulator to a cell connector, and thus prevents the risk of short circuits. [Explanation of symbols]

[0059] 10: Cell 11: Electrode assembly 12: Cover plate assembly 13: Connector 14: First insulator 15: Second insulator 111: Main body 112: Tab 121: Cover plate body 122: Post terminal 131: Post terminal connection section 132: Tab connection section 133: Bending section 141: Adhesive area 142: Non-adhesive area 1401: Boundary Line 143: 1st thinning area 144: Pre-bending section 145:Second thinning area 1321: First Ditch 1322: Thin Flesh Realm 146: Second Ditch

Claims

1. It is a cell, Electrode assembly including tabs, A connector including a post terminal connection portion, a tab connection portion, and a bent portion located between the post terminal connection portion and the tab connection portion, A first insulator is bonded to at least the surface of the tab connection portion near the electrode assembly, A second insulator that is attached to at least the post terminal connection portion and Includes, The post terminal connection portion and the tab connection portion are located on different horizontal planes, the post terminal connection portion is connected to the post terminal of the cell, and the tab connection portion is connected to the tab. At least one of the first insulator and the second insulator includes an adhesive region and a non-adhesive region, the adhesive region being bonded and laminated to the connector, the non-adhesive region being bonded to the connector but not to the connector, and having an overlapping region in which the non-adhesive region of one of the insulators of the first and second insulators and the other insulator of the first and second insulators overlap and are bonded, The first insulator is bonded to the tab connection portion and at least a portion of the post terminal connection portion, and the first insulator includes a first adhesive region which is the adhesive region and a first non-adhesive region which is the non-adhesive region, the first non-adhesive region is bonded to the bent portion and the post terminal connection portion but is not bonded to the bent portion and the post terminal connection portion, and the second insulator includes a second adhesive region which is the adhesive region, the second adhesive region is bonded and bonded to the post terminal connection portion and has a second superimposed region which is the superimposed region, which overlaps and is bonded to the first non-adhesive region of the first insulator, Or, The second insulator is bonded to the post terminal connection portion and at least a portion of the tab connection portion, and the second insulator includes a second adhesive region which is the adhesive region and a second non-adhesive region which is the non-adhesive region, and the second non-adhesive region is bonded to the bent portion and the tab connection portion but is not bonded to the bent portion and the tab connection portion, and the first insulator includes a first adhesive region which is the adhesive region, and the first adhesive region is bonded and bonded to the tab connection portion and has a first superimposed region which is the superimposed region, which overlaps and is bonded to the second non-adhesive region of the second insulator, Furthermore, the first superimposed region and the second superimposed region are not located in the bent portion. cell.

2. If the first insulator includes a first adhesive region and a first non-adhesive region, the second insulator is at least partially disposed on the surface of the first non-adhesive region that is far from the post terminal connection portion to form the second superimposed region. If the second insulator includes the second adhesive region and the second non-adhesive region, the first insulator is at least partially positioned on the surface of the second non-adhesive region that is far from the tab connection portion to form the first superimposed region. The cell according to claim 1.

3. The first insulator includes a first adhesive region and a first non-adhesive region, the second insulator includes a second adhesive region and a second non-adhesive region, and the superimposed region includes the first non-adhesive region of the first insulator and the second non-adhesive region of the second insulator at least partially overlapping. The cell according to claim 1.

4. The superimposed region is fixedly connected by a third insulator or adhesive. The cell according to claim 3.

5. The length of the non-adherent region is a, the length of the shorter of the first insulator and the second insulator is b, the width of the superimposed region is W, and the equation a / 2 ≤ W ≤ b / 2 is satisfied. The cell according to claim 1.

6. If the first insulator includes a first adhesive region and a first non-adhesive region, the boundary line between the first adhesive region and the first non-adhesive region is located in the region of the first insulator corresponding to the tab connection portion. If the second insulator includes the second adhesive region and the second non-adhesive region, the boundary line between the second adhesive region and the second non-adhesive region is located in the region of the second insulator corresponding to the post terminal connection portion. The cell according to claim 1.

7. The non-adhesive region further includes a first thinning region, the first thinning region being located in the portion of the non-adhesive region corresponding to the bent portion. The cell according to claim 1.

8. If the thickness of the first thinned region is c, and the thickness of the region of at least one of the first insulator or the second insulator having the first thinned region excluding the first thinned region is d, then the equation 0 < c ≤ d / 2 is satisfied. The cell according to claim 7.

9. The width of the first thinning region is L, and the radius of the bending portion is R, satisfying the formula R < L < 2R. The cell according to claim 7.

10. Multiple second thinning regions are provided in the first insulator along the width direction of the connector, and the second thinning regions are located at the boundary between the post terminal connection portion and the bent portion or at the boundary between the bent portion and the tab connection portion, and the thickness of the second thinning region is less than the thickness of the other parts excluding the second thinning region. The cell according to claim 1.

11. The tab connection portion is provided with a first through groove, the first through groove extends from one end of the tab connection portion furthest from the bent portion to the other end closer to the bent portion, and the length of the first through groove is less than the length of the tab connection portion. The cell according to claim 1.

12. A pressing region is provided on one side of the tab connection portion that is farther from the first insulator, and the pressing region is provided along the circumferential direction of the first through groove. The cell according to claim 11.

13. The first insulator is provided with a second through groove, and when the first insulator covers the tab connection portion, the second through groove corresponds to the first through groove. The cell according to claim 11.

14. A first step of bonding a first insulator, which includes a first adhesive region and a first non-adhesive region, to a cell connector, A second step involves bonding the second insulator to the connector of the cell, and bonding at least a portion of the second insulator to the first non-adhesive region of the first insulator. Includes, The connector includes a post terminal connector, a tab connector, and a bend located between the tab connector and the post terminal connector, wherein the post terminal connector is connected to the post terminal of the cell, and the tab connector is connected to the tab of the cell. In the first step, the first insulator is bonded to the tab connection portion and at least a portion of the post terminal connection portion, the first adhesive region is bonded and bonded to the tab connection portion, the first non-adhesive region is bonded to the bent portion and the post terminal connection portion but not to the bent portion and the post terminal connection portion, and the second insulator includes a second adhesive region, the second adhesive region is bonded and bonded to the post terminal connection portion, forming a second superimposed region that overlaps and is bonded to the first non-adhesive region of the first insulator. The second superimposed region is not located in the bent portion. Insulator bonding method.

15. The first step is, By uniformly extending the first non-adhesive region of the first insulator along the bent portion of the connector, the first non-adhesive region of the first insulator is bonded to the bent portion of the connector, and the portion of the first non-adhesive region that is relatively far from the first adhesive region is further bonded to the post terminal connection portion of the connector. This also includes, The method for bonding an insulator according to claim 14.

16. The first non-adhesive area is pressed by the external structure so that it is uniformly spread and adhered to the connector. The method for bonding an insulator according to claim 15.

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