Cell, battery, electrical equipment, and insulator adhesion method

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 more particularly to cells, batteries, electrical devices, and insulator bonding methods. [Background technology]

[0002] In recent years, new energy vehicles have become a new trend in the automobile industry, and the number of consumers using them is increasing. As the power source for new energy vehicles, power battery packs are widely used in the field of new energy vehicles. In traditional batteries, the insides of the positive and negative pins of the cells contact the electrode assembly of the battery, which is prone to short circuiting. Therefore, insulators are generally attached to the insides of the positive and negative pins of the cells for insulation protection. However, it is not easy to bond traditional insulators, the bonding effect is poor, and there is a risk of short circuiting. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above-mentioned shortcomings in the technical field, the object of the present invention is to provide a cell, a battery, an electrical device, and an insulator bonding method that improve the problems of conventional insulators, such as the difficulty in bonding the insulator and the poor bonding effect between the insulator and the pin, which may result in the formation of a large gap, which creates a risk of short circuit, and the risk of partial peeling due to the adhesive being exposed in a partial area of ​​the insulator corresponding to the pin and reducing the adhesive strength of the adhesive layer. [Means for solving the problem]

[0004] To achieve the above and other related objects, a first aspect of the present invention provides a cell, the cell including an electrode assembly, a connector, a first insulator, and a second insulator. The electrode assembly includes a tab. connectorincludes a post terminal connection and a tab connection, the post terminal connection and the tab connection being located in different horizontal planes, the post terminal connection being connected to a post terminal of the cell, and the tab connection being connected to a tab. A first insulator at least partially covers a surface of the tab connection that is close to the electrode assembly. A second insulator at least partially covers the post terminal connection. At least one of the first insulator and the second insulator includes a bonded region and a non-bonded region, and the non-bonded region of one of the first insulator and the second insulator is and, The other insulator of the first insulator and the second insulator but At least partially overlapping, Has overlapping areas .

[0005] In one embodiment of the present invention, the first insulator is The first adhesive region is Adhesive and non-adhesive areas A first non-adhesive region and 1. The non-bonded area at least partially covers the post terminal connection and the second insulator and a second overlapping region at least partially overlapping the first non-adhesive region. , or the second insulator is a bonding area A second adhesive region and non-adhesive areas A second non-bonded region and Second The non-bonded area at least partially covers the tab connection portion and the first insulator and a first overlapping region at least partially overlapping the second non-adhesive region. .

[0006] In one embodiment of the present invention, the first insulator 1. Adhesive area and 1. and a non-bonded region, the second insulator 1. At least partially disposed on a surface of the non-bonded region remote from the post terminal connection. to form a second overlap region. The second insulator Second Adhesive area and Second and a non-bonded region, the first insulator Second At least partially disposed on the surface of the non-adhesive region remote from the tab connection. to form a first overlapping region. do.

[0007] In one embodiment of the present invention, The first insulator includes a first bonded region and a first non-bonded region, and the second insulator includes a second bonded region and a second non-bonded region. , the first insulator 1. Non-adhesive area is the 2. Insulation Second Non-adhesive areas and but At least partially overlap , with overlapping regions 。

[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 1. includes an adhesive region and 1. a non - adhesive region, 1. the boundary line between the adhesive region and 1. the non - adhesive region is located in the region corresponding to the tab connection part of the first insulator. When the second insulator Second includes an adhesive region and Second a non - adhesive region, Second the boundary line between the adhesive region and Second the non - adhesive region is located in the region corresponding to the post terminal connection part 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 part do.

[0012] In one embodiment of the present invention, the non - adhesive region At least part of also No. 1 further includes a thinning region, No. 1 and the thinning region is located in the part corresponding to the bending part of the non - adhesive region.

[0013] In one embodiment of the present invention, the thickness of the thinning region is c, Having a first thinned region and assuming that the thickness of the region of the first insulator or at least one of excluding the thinning region of the second insulator No. 1 is d, the formula 0 < c ≤ d / 2 is satisfied.

[0014] In one embodiment of the present invention, the width of the thinning region is L, the radius of the bending part is R, and the formula R < L < 2R is satisfied.

[0015] In one embodiment of the present invention, The pre-bend is in the non-bonded area corresponding to the bend. It will be established.

[0016] In one embodiment of the present invention, At least one of the first and second insulators has another portion adjacent the pre-bend, the other portion including a second thinned region at a juncture with the pre-bend, the second thinned region having a thickness of The thickness of the pre-bent portion is less than the thickness of the other portion excluding the pre-bent portion, or the thickness of the pre-bent portion is less than the thickness of the other portion excluding the pre-bent portion.

[0017] In one embodiment of the present invention, It is a connection part The two ends of the pre-bent section Department The distance is at least 0.7 times the length of the bend.

[0018] In one embodiment of the present invention, connector Along the width of the joint 2nd Thinned area multiple It is provided, Second The thickness of the thinned region is Second The thickness is less than the thickness of the other portions excluding the thinned area.

[0019] In one embodiment of the invention, the tab connection portion is provided with a first groove, the first groove extending from one end of the tab connection portion remote from the bend portion to the other end close to the bend 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, the tab connection has a side remote from the first insulator. Pressed Area is established, Pressed Area is provided along the circumferential direction of the first groove.

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

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

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

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

[0025] The first step further includes a molding step, , No. 1 The bonding area of ​​the insulator Adhering to a tab connection of a connector having a bend between the tab connection and the post terminal connection; The unbonded area of ​​the first insulator connector By spreading it along the bend, First insulator Non-adhesive areas Connector It is attached to the bent part, connector and at least partially bonding to the post terminal connection portion of the solder joint.

[0026] Further, the non-adhesive region is connector The outer structure presses the material together so that the material is spread evenly over the entire surface and adheres to the outer surface. Effect of the Invention

[0027] The present invention provides a cell, a battery, and an electric device, in which a first insulator and / or a second insulator are provided with a bonded area and a non-bonded area. The bonded area of ​​the first insulator and / or the second insulator does not cover the bent portion, and the non-bonded area of ​​one of the first insulator and the second insulator covers the bent portion and at least partially overlaps with the other insulator. Therefore, the insulator is not affected by the bond at the bent portion, making it easier to attach the insulator to the bent portion, reducing the difficulty of attaching the insulator to the connector, and improving the attachment effect.

[0028] The present invention provides a cell, a battery, and an electric device, in which the first insulator and / or the second insulator are provided with a bonded area and a non-bonded area, and the first insulator and the second insulator at least partially overlap each other to form an overlapping area, which can further improve the bonding effect, prevent the formation of a large gap at the bent part of the connector to expose metal, and prevent the risk of being cut by metal shavings burrs at the exposed part. The second insulator partially covers the first insulator to form an overlapping area, which prevents the risk of partial peeling of the insulator, and thus prevents the risk of short circuiting the cell.

[0029] The present invention provides a cell, battery, and electrical device, in which a thin-walled area or pre-bent portion is provided in the portion corresponding to the bend in the non-bonded area, which makes the insulator easier to bend, reduces the difficulty of bonding, and improves the bonding effect.

[0030] The present invention provides an insulator bonding method, in which a first insulator is provided with bonded and non-bonded areas, and at least a portion of the bonded area of ​​a second insulator is bonded to the non-bonded area of ​​the first insulator, and a molding step is performed to improve the bonding of the insulator onto the cell connector to reduce the risk of gap formation in the bonding of the insulator and the cell connector, and thus prevent the risk of short-circuiting the cells. [Brief description of the drawings]

[0031] In order to more clearly present the technical solutions of the embodiments of the present invention, the drawings necessary for describing the embodiments are briefly described below. Of course, the drawings described below only illustrate some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0032] [Figure 1] 1 is a structural diagram of a cell according to some embodiments of the present invention. [Diagram 2] 1 is a structural cross-sectional view of a cell according to some embodiments of the present invention. [Diagram 3] 1 is a schematic diagram of an insulator bonded connector and cover plate assembly according to some embodiments of the present invention. [Figure 4] 1 is a partial schematic diagram of a connector and cover plate assembly with an insulator bonded thereto according to some embodiments of the present invention. [Diagram 5] 1 is a top view of a connector and cover plate assembly with an insulator bonded thereto according to some embodiments of the present invention. [Figure 6] FIG. 6 is a structural cross-sectional view taken along line AA in FIG. 5. [Figure 7] FIG. 7 is an enlarged view of the structure at B in FIG. 6. [Figure 8] 2 is a schematic diagram of a first insulator according to some embodiments of the present invention. [Figure 9] 13 is a partial schematic diagram of a connector and cover plate assembly with an insulator bonded thereto according to another embodiment of the present invention. [Figure 10] 13 is a partial schematic view of a connector and cover plate assembly with an insulator bonded thereto according to yet another embodiment of the present invention. [Figure 11] 1A-1C are schematic diagrams illustrating the bonding of a first insulator according to some embodiments of the present invention. [Figure 12] FIG. 12 is a schematic view of the first insulator of FIG. 11 after bonding. [Figure 13] FIG. 13 is a schematic diagram showing the bonding of the second insulator of FIG. 12. [Figure 14] 11 is a structural diagram of a connector according to another embodiment of the present invention. [Figure 15] FIG. 11 is a structural diagram of a first insulator according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Although the embodiments of the present invention will be described based on specific examples, those skilled in the art can easily understand other advantages and effects of the present invention based on the contents disclosed in this specification. The present invention may be further implemented or applied based on other different specific embodiments, and various details in this specification may be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] The drawings accompanying the embodiments are intended to show the basic concept of the present invention in a schematic manner, and show only the components related to the present invention, and are not illustrated according to the actual number, shape, dimensions, etc. of the components in the actual implementation. The shape, number, and ratio of each component in the actual implementation may be changed arbitrarily, and the arrangement of the components may be more complicated.

[0035] Referring to FIG. 1 to FIG. 15, in a conventional battery, the inside of the positive and negative pins of the cell are directly connected to the electrode assembly of the battery, which is prone to short circuit. Due to the limitation that the inside of the positive and negative pins are transition areas, the conventional battery cell does not provide that protection, and the inside of the positive and negative pins are in a state of exposed metal. The exposed metal may cause a short circuit between the connector and the electrode assembly of the battery. The existing solution is generally to attach an insulator to the inside of the positive and negative pins for insulation protection, but the pasting of the conventional insulator is difficult, and the pasting effect of the insulator and the pin is poor. As a result, a large gap is formed, and there is a risk of a short circuit. In addition, there is a risk that the adhesive is exposed in a partial area corresponding to the pin of the insulator, reducing the adhesion of the adhesive layer and causing partial peeling. Therefore, the present invention provides a cell, a battery, an electric device, and an insulator bonding method that improve the problems of conventional insulators, such as difficulty in bonding, poor bonding effect in the region of the insulator corresponding to the connector bend, which may result in a large gap and a risk of short circuit, and a risk of partial peeling due to exposure of the adhesive in the region of the insulator corresponding to the connector bend and reduced adhesion of the adhesive layer. In particular, the cell 10 includes an electrode assembly 11, a cover plate assembly 12, a connector 13, a first insulator 14, and a second insulator 15. The electrode assembly 11 includes a main body 111 and a tab 112 extending from the main body 111. For example, the tab 112 is located on two sides of the main body 111. The cover plate assembly 12 includes a cover plate body 121 and a post terminal 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. Of course, in some other embodiments, the post terminal 122 may be located in other parts of the cell, such as the cell housing.

[0036] 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 on 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 in a direction 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 between the top surface and the left or right surface of the electrode assembly 11, the top surface being the side of the electrode assembly 11 closer to the bottom surface of the cover plate assembly 12.

[0037] 1 to 4 and 8, in this embodiment, the first insulator 14 at least partially covers a surface of the tab connection portion 132 close to 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 a bonding region and a non-bonding region, and the non-bonding region of at least one of the first insulator 14 and the second insulator 15 at least partially overlaps the other insulator to form an overlapping region. For example, the first insulator 14 includes a bonding region 141 and a non-bonding region 142, and the bonding region 141 at least covers a surface of the tab connection portion 132 close to the electrode assembly 11, for example, covers a surface of the tab connection portion 132 close to the main body 111. The non-bonding region 142 covers the bent portion 133, and the non-bonding region 142 at least partially covers a 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 being shorted with the electrode assembly 11, and the safety during use of the cell 10 is improved. In addition, the metal portion of the connector 13 covered by the first insulator 14 is prevented from being corroded by air, and the service life of the connector 13 is improved, and thus the overall reliability during use of the cell 10 is improved. In addition, the boundary line 1401 between the adhesive region 141 and the non-adhesive region 142 of the first insulator 14 is located in an 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 region 141 avoids the bending region of the connector 13 and is disposed on the surface of the tab connection portion 132 of the connector 13. Therefore, it is possible to prevent the adhesive from being disposed in the bending region and affecting the adhesion of the first insulator 14, and therefore it is possible to reduce the difficulty of adhering the first insulator 14 and improve the lamination effect.

[0038] 1 to 4 and 8, in the past bonding of the insulator and the pin, the bonding effect in the area corresponding to the connector bend of the first insulator is poor, resulting in a large gap. As a result, the adhesive is likely to be exposed in the area corresponding to the connector bend of the first insulator, and to adhere to metal chips and welding burrs generated by connector welding, and there is a risk that the metal chips will fall off. In addition, after the electrode is immersed, there is a risk that the adhesive strength of the adhesive layer will decrease in the exposed area of ​​the adhesive, and there is a risk of partial peeling 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-bonded area 142 of the first insulator 14 to form an overlapping area. Specifically, the second insulator 15 at least partially covers the surface of the non-bonded area 142 far from the post terminal connection portion 131, so that the non-bonded area 142 of the second insulator 15 forms an overlapping area. Therefore, the bonding effect is further improved, metal exposure due to the formation of a large gap at the bent portion of the connector is prevented, the risk of cutting due to metal shavings burrs at the exposed portion is prevented, the risk of partial peeling of the insulator is prevented, and the risk of short circuiting the cell is prevented. Note that the first insulator 14 and the second insulator 15 are adhesive tapes, but are not limited to adhesive tapes. Also, the electrode assembly 11 has a box structure, and the adhesive tape connected to the positive and negative tabs of the electrode assembly 11 is connector Both 13 are provided with a first insulator 14 and a second insulator 15, and the electrode assembly 11 may in particular be of laminate and / or winding construction.

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

[0040] 4 to 7, in this embodiment, the length of the non-bonded region 142 of the first insulator 14 and / or the second insulator 15 is a, the length of the shorter one 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, which satisfies the formula a / 2≦W≦b / 2. Therefore, the overlapping region is not too small and does not require improvement of the equipment to improve the alignment accuracy of the adhesive fixture, or the overlapping region is not too large and does not result in an excessively large non-bonded region that causes the insulator to fall off due to its own weight and affects the insulation performance. Take for example the first insulator 14 including a bonded region and a non-bonded region, the non-bonded region of the first insulator 14 partially covers the second insulator 15, the length of the non-bonded 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, it becomes possible to bend the first insulator 14 or the second insulator 15 more easily and maintain the bent state of the first insulator 14 or the second insulator 15, 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, a bending trace may be provided in advance in the first thinning region 143, thus reducing the bonding difficulty.

[0042] Referring to FIG. 10, in some other embodiments, when the first insulator 14 and / or the second insulator 15 include a bonded region and a non-bonded region, the insulator including the non-bonded region of the first insulator 14 and / or the second insulator 15 is provided with a pre-bent portion 144, 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 a bonded region 141 and a non-bonded region 142. The pre-bent portion 144 is located in a portion of the non-bonded region 142 that corresponds to the bent portion 133. That is, the pre-bent portion 144 is located in the non-bonded region 142 and corresponds to the bent portion 133 of the connector 13. Therefore, it is possible to more easily bend the first insulator 14 and maintain the bent state of the first insulator 14, and thus the difficulty of bonding is reduced. In this embodiment, the thickness of the connection 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 thinned region 145, which is located at the joint between the post terminal connection portion 131 and the bent portion 133 and / or 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 easily bend and attach the first insulator 14. In some other embodiments, more thinned regions may be provided in the pre-bent portion 144 and may be located between the second thinned region 145 at the joint between the post terminal connection portion 131 and the bent portion 133 and the second thinned region 145 at the joint between the bent portion 133 and the tab connection portion 132. Further, in some other embodiments, the thickness of the pre-bent portion 144 may be configured to be less than the thickness of other portions 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] 10 , in some other embodiments, the distance between the two connection parts where the two ends of the pre-bent portion 144 connect to the other parts of the first insulator 14 except the pre-bent portion 144 is not less than 0.7 times the length of the bent portion 133 in the connector 13, and the pre-bent portion 144 can cover the main area of ​​the bent portion 133 and prevent the first insulator 14 from wrinkling when it is attached to the bent portion 133. Furthermore, the distance between the two connection parts where the two ends of the pre-bent portion 144 connect to the other parts of the first insulator 14 except the pre-bent portion 144 is not more than 1.3 times the length of the bent portion 133 in the connector 13.

[0044] 10, in some other embodiments, a plurality of second thinned regions 145 are provided at the connection between the pre-bent portion 144 and the other portion of the first insulator 14 along the width direction of the connector 13, and the thickness of the second thinned region 145 is less than the thickness of the other portion of the first insulator 14 except for the second thinned region 145. That is, the plurality of second thinned regions 145 are provided at intervals at the connection between the pre-bent portion 144 and the other portion 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 thinned region from breaking due to the first insulator 14 being pulled during the bonding process, which may affect the insulating performance. Note that the first thinned region 143 and the second thinned region 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 reducing the insulating performance of the first insulator 14 in order to facilitate bending and maintaining the bent state of the first insulator 14, and thus reduce the difficulty of bonding. Note that when the second insulator 15 includes bonded and non-bonded regions, it is also possible to provide a pre-bent portion and a second thinned region, and the relationship and characteristics between the second insulator 15, the pre-bent portion, and the second thinned 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 thinned region 145 in the first insulator 14.

[0045] 11 to 13 and 3, in this embodiment, the first insulator 14 includes an adhesive region 141 and a non-adhesive region 142, and the process of adhering 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 a second step, the non-bonded region 142 of the first insulator 14 is evenly spread along the bent portion 133 of the connector 13, and the non-bonded region 142 is attached to the bent portion 133 and at least partially attached to the post terminal connection portion 131 of the connector 13. The non-bonded region 142 may be pressed by an external structure to be evenly spread and attached to the connector 13.

[0048] In a third step, the second insulator 15 is adhered to the post terminal connection portion 131 of the connector 13 and at least partially covers the surface of the non-adhesive area 142 of the first insulator 14 located at the post terminal connection portion 131 to form an overlapping area.

[0049] According to the above-mentioned insulator bonding method, the second insulator 15 covers the post terminal connection portion 131 and at least partially covers the non-bonded 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-bonded region 142 far from the post terminal connection portion 131 to form an overlapping region with the non-bonded region 142 of the first insulator 14. This further improves the bonding effect, prevents metal exposure due to the formation of a large gap at the bent portion of the connector, prevents the risk of cutting due to metal shavings burrs at the exposed portion, and prevents partial peeling of the insulator, thereby preventing the risk of short-circuiting the cell.

[0050] 14 and 15, in some other embodiments, a first groove 1321 is provided in the tab connection portion 132. The first groove 1321 extends from one end of the tab connection portion 132 far from the bent portion 133 to the other end close to the bent portion 133, and the length of the first groove 1321 is less than the length of the tab connection portion 132 to facilitate connection with the tab 112. Furthermore, a thinned region 1322 is provided on one side of the tab connection portion 132 far from the first insulator 14. The thinned region 1322 is provided along the circumferential direction of the first groove 1321, and the thinned region 1322 is formed by pressing a local region along the circumferential direction of the first groove 1321 in the tab connection portion 132 to improve the structural strength of the tab connection portion 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 to improve the adhesion of the tab connection portion 132 .

[0051] 1 to 5, the present embodiment further provides a battery. The battery includes at least one cell 10 as described in the above embodiment. For example, the electrode assembly 11 in 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 part of the connector 13 from shorting with the electrode assembly 11, improving safety during use of the cell 10 and reducing the risk of leakage of the battery. They also prevent the metal part of the connector 13 covered by the first insulator 14 from being corroded 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 use of the ionization module. Note that the battery module may be a battery module formed by serial or parallel connection of a plurality of cells, or a combination of serial and parallel connection of a plurality of cells. Alternatively, a plurality of such battery modules may be assembled to form a battery pack, or the battery pack and the battery module may be directly formed by assembling the cells.

[0052] 1 to 15, the present embodiment further provides an electric device. The electric device includes the cell described in the above embodiment. The electric device may be, for example, equipment such as a vehicle, an energy storage cabinet, etc.

[0053] The present invention provides a cell, a battery, and an electric device, in which a first insulator and / or a second insulator are provided with a bonded area and a non-bonded area. The bonded area of ​​the first insulator and / or the second insulator does not cover the bent portion, and the non-bonded area of ​​one of the first insulator and the second insulator covers the bent portion and at least partially overlaps with the other insulator. Therefore, the insulator is not affected by the bond at the bent portion, which makes the bonding easier, reduces the difficulty of bonding the insulator and the connector, and improves the bonding effect.

[0054] The present invention provides a cell, a battery, and an electric device, in which the first insulator and / or the second insulator are provided with a bonded area and a non-bonded area, and the first insulator and the second insulator at least partially overlap each other to form an overlapping area, which can further improve the bonding effect, prevent the formation of a large gap at the bent part of the connector to expose metal, and prevent the risk of being cut by metal shavings burrs at the exposed part. The second insulator partially covers the first insulator to form an overlapping area, which prevents the risk of partial peeling of the insulator, and thus prevents the risk of short circuiting the cell.

[0055] The present invention provides a cell, battery, and electrical device, in which a thinned area or pre-bent portion is provided in a portion corresponding to the bent portion of the non-bonded area, which makes the insulator easier to bend, reduces the difficulty of bonding, and improves the bonding effect.

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

[0057] Except for the technical features described herein, other technical features are known to those skilled in the art, and in order to highlight the innovative features of the present invention, the other technical features will not be described in further detail herein. [Industrial Applicability]

[0058] The present invention provides a cell, battery, electrical device, and insulator bonding method that reduces the risk of gap formation in the bonding of the insulator and the cell connector, thereby preventing 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 132: Tab connection 133: Bending section 141: Adhesive area 142: Non-adhesive area 1401: Border 143: 1st thinning area 144: Pre-bending section 145:Second thinning area 1321: 1st groove 1322: Thin Meat Field 146: 2nd groove

Claims

1. A cell, an electrode assembly including a tab; a connector including a post terminal connection portion and a tab connection portion; a first insulator at least partially covering a surface of the tab connection portion adjacent to the electrode assembly; a second insulator at least partially covering the post terminal connection portion; Including, the post terminal connection portion and the tab connection portion are located on different horizontal planes, the post terminal connection portion is connected to a 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 a bonded region and a non-bonded region, and the non-bonded region of one of the first insulator and the second insulator at least partially overlaps the other of the first insulator and the second insulator to form an overlap region. cell.

2. the first insulator includes the bonded region and the non-bonded region, the non-bonded region at least partially covering the post terminal connection portion, and the second insulator at least partially overlaps the non-bonded region to form the overlap region; Or, the second insulator includes the bonded region and the non-bonded region, the non-bonded region at least partially covering the tab connection portion, and the first insulator at least partially overlaps the non-bonded region to form the overlap region; The cell of claim 1 .

3. When the first insulator includes the bonded region and the non-bonded region, the second insulator is at least partially disposed on a surface of the non-bonded region remote from the post terminal connection portion to form the overlapping region; When the second insulation includes the bonded region and the non-bonded region, the first insulation is at least partially disposed on a surface of the non-bonded region remote from the tab connection portion to form the overlap region. The cell of claim 2.

4. both the first insulator and the second insulator include the bonded region and the non-bonded region, the non-bonded region of the first insulator at least partially overlapping the non-bonded region of the second insulator to form the overlap region; The cell of claim 1 .

5. The overlapping region is fixedly connected by a third insulator or an adhesive. The cell of claim 4.

6. The length of the non-bonded region is a, the length of the shorter one of the first insulator and the second insulator is b, and the width of the overlapping region is W, satisfying the formula a / 2≦W≦b / 2. The cell of claim 1 .

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

8. The connector further includes a bent portion, and the post terminal connection portion is connected to the tab connection portion via the bent portion. The cell of claim 1 .

9. The non-bonded region further includes a thinned region, the thinned region being located in a portion of the non-bonded region corresponding to the bent portion. The cell of claim 8.

10. When the thickness of the thinned region is c and the thickness of a region of at least one of the first insulator and the second insulator excluding the thinned region is d, the formula 0<c≦d / 2 is satisfied. The cell of claim 9.

11. the width of the thinned region is L and the radius of the bend is R, satisfying the equation R<L<2R; The cell of claim 9.

12. A pre-bent portion is provided in a portion of the non-bonded region corresponding to the bent portion. The cell of claim 8.

13. The thickness of a connection portion where the pre-bent portion is connected to the other portion excluding the pre-bent portion is less than the thickness of the other portion excluding the pre-bent portion. Or, The thickness of the pre-bent portion is less than the thickness of the other portion excluding the pre-bent portion. The cell of claim 12.

14. The distance between two connection parts where the two ends of the pre-bent part are connected to the other part excluding the pre-bent part is 0.7 times or more the length of the bent part. The cell of claim 13.

15. a plurality of thinned regions are provided at the connection portion along a width direction of the pin, and a thickness of the thinned regions is less than a thickness of other portions excluding the thinned regions; The cell of claim 13.

16. a first groove is provided in the tab connection portion, the first groove extends from one end of the tab connection portion far from the bent portion to the other end close to the bent portion, and a length of the first groove is less than a length of the tab connection portion; The cell of claim 8.

17. a thin-walled region is provided on one side of the tab connection portion away from the first insulator, and the thin-walled region is provided along a circumferential direction of the first groove; 17. The cell of claim 16.

18. 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.

17. The cell of claim 16.

19. The cell according to any one of claims 1 to 18. Including, battery.

20. The cell according to any one of claims 1 to 18. Including, Electrical equipment.

21. a first step of adhering a first insulator having an adhesive region and an unadhesive region to a connector of the cell; a second step of adhering a second insulator to the connector of the cell and adhering at least a portion of the second insulator to the unattached area of ​​the first insulator; Including, Insulation bonding method.

22. The first step further includes a molding step, The molding step includes: First, the adhesive region of the first insulator is adhered to a tab connection portion of the pin, the connector further comprising a bent portion and a post terminal connection portion, the bent portion connecting the tab connection portion and the post terminal connection portion; Next, the non-bonded region of the first insulator is spread evenly along the bent portion of the pin so that the non-bonded region is bonded to the bent portion and at least partially bonded to the post terminal connection portion of the pin. Including, 22. The method of claim 21 .

23. The non-adhesive area is pressed by an external structure so as to be evenly spread and adhered to the pin.

23. The method of claim 22.

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