Connecting structure of pole lug and pole column and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a connecting structure of a pole lug and a pole column and a battery, the connecting structure comprises the pole column, the pole lug and a conductive colloid, and the pole column is connected with the pole lug through the conductive colloid; the pole comprises a pole body and a connector, the connector comprises a body, a first surface and a second surface, the first surface and the second surface are oppositely arranged on the body, and the pole body is connected with the first surface; a penetrating groove is formed in the second face, a communicating hole is formed in the body, and the penetrating groove is communicated with the communicating hole; the tab comprises a penetrating part and a first bending part, the first bending part is connected with the penetrating part and is bent relative to the penetrating part, the penetrating part penetrates into the penetrating groove, the first bending part penetrates into the communicating hole, and the conductive colloid is at least arranged in the communicating hole. And the phenomenon of unstable connection or low product quality caused by a welding connection mode is avoided, the problem of short circuit of the battery core caused by the welding mode is avoided, the yield of the battery is effectively improved, and the use safety of the battery is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a connection structure between an electrode tab and an electrode post and a battery. Background Art

[0002] Lithium-ion batteries are widely used in various electronic products such as mobile terminals, power tools, and electric vehicles. In the prior art, a single battery includes a housing and an electric core disposed inside the housing. A top cover is provided above the battery housing, and two positive and negative electrode posts are provided on the top cover. The battery is provided with two positive and negative connection pieces. The two electrode posts are first laser welded to the connection pieces, and then the connection pieces are connected to two electrode tabs on the electric core by ultrasonic welding, so as to realize the current conduction between the internal electric core and the electrode posts.

[0003] The defects of the above prior art are that the electrode tab and the electrode post are connected by welding, which is prone to phenomena such as virtual welding or over-welding, resulting in the detachment of the electrode tab or the damage of the electrode tab and the electrode tab body. In addition, the burrs generated by welding are also very likely to pierce the diaphragm and cause internal short circuit of the electric core, which seriously affects the product quality of lithium-ion batteries. During the ultrasonic welding process, metal particles will be generated. If the metal particles fall onto the diaphragm, friction occurs between the metal particles and the diaphragm, resulting in damage to the diaphragm, causing the positive and negative electrode plates on both sides of the diaphragm to contact, resulting in short circuit of the electric core and reducing the safety of the battery. Summary of the Utility Model

[0004] In order to solve the deficiencies of the above prior art, the utility model provides a connection structure between an electrode tab and an electrode post and a battery. By improving the connection structure between the electrode tab and the electrode post, the problems of low product quality and safety performance caused by connecting the electrode tab and the electrode post by welding are solved. The connection structure of the connection piece and the welding connection method are cancelled, effectively avoiding the phenomenon of unstable connection or low product quality caused by the welding connection method, eliminating the problem of short circuit of the electric core caused by the welding method, effectively improving the yield rate of the battery, ensuring the use safety of the battery, and increasing the contact area between the electrode tab and the electrode post and improving the connection stability between the electrode tab and the electrode post by setting a penetration groove, a communication hole and a conductive colloid. The connection process of the above connection structure is simple and easy to operate, only need to heat and melt and cure a conductive adhesive once at high temperature, without laser welding and ultrasonic welding, effectively improving the production efficiency and reducing the production cost.

[0005] In a first aspect, the utility model provides a connection structure between an electrode tab and an electrode post, including an electrode post, an electrode tab and a conductive colloid, and the electrode post and the electrode tab are connected by the conductive colloid;

[0006] The terminal post includes a post body and a connecting body. The connecting body includes a main body, a first surface and a second surface oppositely arranged on the main body. The post body is connected to the first surface. A penetrating groove is arranged on the second surface, and a communicating hole is arranged inside the main body. The penetrating groove and the communicating hole are communicated with each other.

[0007] The tab includes a penetrating portion and a first bending portion. The first bending portion is connected to the penetrating portion and is bent relative to the penetrating portion. The penetrating portion penetrates into the penetrating groove, and the first bending portion penetrates into the communicating hole. And the conductive colloid is at least arranged in the communicating hole.

[0008] In some implementation manners, an emerging groove is further arranged on the second surface. The emerging groove and the communicating hole are communicated with each other. The tab further includes an emerging portion. The emerging portion is connected to the first bending portion and is bent in a direction close to the penetrating portion. The emerging portion penetrates into the emerging groove.

[0009] In some implementation manners, the tab further includes a second bending portion. The second bending portion is connected to the emerging portion and is bent in a direction close to or away from the penetrating portion.

[0010] In some implementation manners, the second bending portion is parallelly attached to the second surface.

[0011] In some implementation manners, the tab includes a first tab and a second tab. Both the first tab and the second tab include the penetrating portion and the first bending portion. The penetrating groove includes a first penetrating groove and a second penetrating groove. The communicating hole includes a first communicating hole and a second communicating hole. The first penetrating groove and the first communicating hole are communicated with each other. The second penetrating groove and the second communicating hole are communicated with each other. The penetrating portion of the first tab penetrates into the first penetrating groove, and the first bending portion of the first tab penetrates into the first communicating hole. The penetrating portion of the second tab penetrates into the second penetrating groove, and the first bending portion of the second tab penetrates into the second communicating hole.

[0012] In some implementation manners, an emerging groove is further arranged on the second surface. The emerging groove includes a first emerging groove and a second emerging groove. The first emerging groove and the first communicating hole are communicated with each other. The second emerging groove and the second communicating hole are communicated with each other. Both the first tab and the second tab further include emerging portions. The emerging portion of the first tab is connected to the first bending portion of the first tab and is bent in a direction close to the penetrating portion of the first tab. The emerging portion of the first tab penetrates into the first emerging groove. The emerging portion of the second tab is connected to the first bending portion of the second tab and is bent in a direction close to the penetrating portion of the second tab. The emerging portion of the second tab penetrates into the second emerging groove.

[0013] In some implementations, the first insertion slot is disposed outside the body relative to the first extraction slot, and the second insertion slot is disposed outside the body relative to the second extraction slot.

[0014] In some implementations, a first side end is provided at one end of the body, a second side end is provided at the other end of the body, the first insertion slot, the first communication hole, and the first extraction slot are disposed on one side of the body and extend to the first side end, and the second insertion slot, the second communication hole, and the second extraction slot are disposed on the other side of the body and extend to the second side end.

[0015] In some implementations, a common slot is further provided on the second surface, the common slot is respectively communicated with the first communication hole and the second communication hole, the common slot simultaneously forms the first insertion slot and the second insertion slot, or the common slot simultaneously forms the first extraction slot and the second extraction slot.

[0016] In a second aspect, the present utility model further provides a battery including the above connection structure.

[0017] In summary, the present utility model has at least the following advantages:

[0018] 1. For the connection structure between the tab and the terminal post provided by the present utility model, through the combined design of the insertion slot, the communication hole and the conductive colloid, the tab passes through the insertion slot and is placed in the communication hole, and then the conductive glue is poured from the insertion slot, so that at least the communication hole is filled with the conductive glue. After the conductive glue is cured, a conductive colloid is formed, and the tab and the terminal post are thus connected. This method can increase the contact area between the tab and the terminal post and improve the connection stability between the tab and the terminal post.

[0019] 2. For the connection structure provided by the present utility model, since laser welding and ultrasonic welding are not required, it can effectively avoid the phenomenon of unstable connection or low product quality caused by the welding connection method, eliminate the problem of short circuit of the battery core caused by the welding method, effectively improve the yield rate of the battery, and ensure the use safety of the battery.

[0020] 3. For the connection structure provided by the present utility model, the connection process of this connection structure is simple and easy to operate. It only needs to heat-melt and cure the conductive glue once at a high temperature, without laser welding and ultrasonic welding, effectively improving the production efficiency and reducing the production cost.

[0021] 4. For the connection structure provided by the present utility model, the insertion slot and the communication hole are used to connect with the tab, canceling the connection structure of the connecting piece and the welding connection method, simplifying the top cover structure and reducing the overall height of the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic structural diagram of the connection structure between the tab and the terminal in Embodiment 1.

[0023] Figure 2 Schematic structural diagram of one perspective of the terminal in Embodiment 1.

[0024] Figure 3 Schematic structural diagram of another perspective of the terminal in Embodiment 1.

[0025] Figure 4 Exploded sectional view of the connection structure between the tab and the terminal in Embodiment 1.

[0026] Figure 5 Schematic structural diagram of the connection structure between the tab and the terminal in Embodiment 2.

[0027] Figure 6 Schematic structural diagram of one perspective of the terminal in Embodiment 2.

[0028] Figure 7 Schematic structural diagram of another perspective of the terminal in Embodiment 2.

[0029] Figure 8 Vertical sectional view of the connecting body in Embodiment 2.

[0030] Figure 9 Schematic sectional view of the connection structure between the tab and the terminal in Embodiment 2.

[0031] Figure 10 Exploded sectional view of the connection structure between the tab and the terminal in Embodiment 2.

[0032] Figure 11 Schematic structural diagram of the connection structure between the tab and the terminal in Embodiment 3.

[0033] Figure 12 For Figure 11 Enlarged structural diagram of part A in

[0034] Figure 13 Schematic structural diagram of the bottom view perspective of the connecting body in Embodiment 3.

[0035] Figure 14 Schematic vertical sectional view of the connecting body in Embodiment 3.

[0036] Figure 15 Exploded sectional view of the connection structure between the tab and the terminal in Embodiment 3.

[0037] Figure 16 Schematic structural diagram of the battery in Embodiment 4.

[0038] Markings in the figure:

[0039] 1. pole, 11. column, 12. connector, 121. body, 1211. first side end, 1212. second side end, 122. first surface, 123. second surface, 124. insertion groove, 125. communicating hole, 126. insertion groove, 127. common groove;

[0040] 2. Pole ear, 21. Insertion portion, 22. First bending portion, 23. Exit portion, 24. Second bending portion

[0041] 2A, a first pole ear, 124A, a first insertion groove, 125A, a first communication hole, 126A, a first exit groove;

[0042] 2B, a second pole ear, 124B, a second insertion groove, 125B, a second communication hole, 126B, a second exit groove;

[0043] 3. Battery. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] Please refer to the attached Figure 1 -Attached Figure 4 The utility model provides a connection structure between a pole ear and a pole, comprising a pole 1, a pole ear 2 and a conductive colloid, wherein the pole 1 and the pole ear 2 are connected through the conductive colloid;

[0048] The pole 1 includes a column 11 and a connecting body 12. The connecting body 12 includes a body 121, a first surface 122 and a second surface 123 arranged opposite to the body 121. The column 11 is connected to the first surface 122. The second surface 123 is provided with a penetration groove 124. A connecting hole 125 is provided inside the body 121. The penetration groove 124 and the connecting hole 125 are arranged in communication.

[0049] The tab 2 includes a penetrating portion 21 and a first bending portion 22. The first bending portion 22 is connected to the penetrating portion 21 and is bent relative to the penetrating portion 21. The penetrating portion 21 penetrates into the penetrating groove 124, and the first bending portion 22 penetrates into the communication hole 125, and the conductive colloid is disposed at least in the communication hole 125.

[0050] Wherein, the column body 11 and the connecting body 12 can be integrally formed.

[0051] In this embodiment, the connection method between the tab 2 and the terminal 1 is as follows: the tab 2 is passed through the penetrating groove 124 and placed in the communication hole 125, and then the conductive adhesive is poured from the penetrating groove 124 so that at least the communication hole 125 is filled with the conductive adhesive. After the conductive adhesive is cured, a conductive colloid is formed, and the tab 2 and the terminal 1 are thus connected. By passing the penetrating portion 21 into the penetrating groove 124 and the first bending portion 22 into the communication hole 125, and at least the communication hole 125 is filled with the conductive adhesive. After the conductive adhesive is cured, a conductive colloid is formed. The conductive colloid is in close contact with the communication hole 125, and the first bending portion 22 is wrapped in the conductive colloid and is in close contact with the conductive colloid, which can increase the contact area between the tab 2 and the terminal 1, improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the penetrating groove 124 and the communication hole 125. At the same time, increasing the contact area between the tab 2 and the terminal 1 can also effectively reduce the conduction resistance between the tab 2 and the terminal 1, reduce the risk of battery heating and damage, and improve the service life and application ability of the battery. The first bending portion 22 is bent relative to the penetrating portion 21, so that the penetrating portion 21 and the first bending portion 22 of the tab 2 form an L-shaped structure, and the first bending portion 22 is wrapped in the conductive colloid, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the penetrating groove 124 and the communication hole 125. Since there is no need for laser welding and ultrasonic welding, it can effectively avoid the phenomenon of unstable connection or low product quality caused by the welding connection method, eliminate the problem of cell short circuit caused by the welding method, effectively improve the yield rate of the battery, and ensure the use safety of the battery. And the connection process of this connection structure is simple and easy to operate, only need to heat and melt and cure the conductive adhesive once, without laser welding and ultrasonic welding, which effectively improves the production efficiency and reduces the production cost.

[0052] And by providing the penetrating groove 124 and the communication hole 125 on the main body 121, the connection structure of the connecting piece and the welding is cancelled, the top cover structure is simplified, and the overall height of the top cover is reduced.

[0053] Preferably, the insertion part 21 is inserted into the insertion groove 124, and the first bending part 22 is inserted into the communication hole 125. The insertion groove 124 and the communication hole 125 are filled with conductive adhesive, that is, the conductive adhesive can flow between the insertion groove 124 and the communication hole 125. After the conductive adhesive is cured, a conductive colloid is formed. The conductive colloid is in close contact with the insertion groove 124 and the communication hole 125. The insertion part 21 and the first bending part 22 are both wrapped in the conductive colloid and in close contact with the conductive colloid, which can further increase the contact area between the tab 2 and the terminal 1, improve the connection stability between the tab 2 and the terminal 1, and prevent the tab 2 and the conductive colloid from falling off from the insertion groove 124 and the communication hole 125. At the same time, increasing the contact area between the tab 2 and the terminal 1 can also effectively reduce the conduction resistance between the tab 2 and the terminal 1, reduce the risk of battery heating and damage, and improve the service life and application ability of the battery.

[0054] In some embodiments, the second surface 123 is further provided with an exit groove 126, and the exit groove 126 is communicated with the communication hole 125; the tab 2 further includes an exit part 23, the exit part 23 is connected to the first bending part 22 and is bent in the direction close to the insertion part 21, and the exit part 23 is inserted into the exit groove 126. By arranging the exit part 23 of the tab 2 to be inserted into the exit groove 126 and the exit part 23 to be bent relative to the first bending part 22, a U-shaped structure is formed by the insertion part 21, the first bending part 22 and the exit part 23 of the tab 2, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the insertion groove 124, the communication hole 125 and the exit groove 126. Preferably, the conductive adhesive can flow between the insertion groove 124, the communication hole 125 and the exit groove 126, and the conductive colloid is also arranged in the exit groove 126, which can further increase the contact area between the tab 2 and the connecting body 12 and improve the stability and firmness of the connection.

[0055] In some embodiments, the tab 2 further includes a second bending part 24, the second bending part 24 is connected to the exit part 23 and is bent in the direction close to or away from the insertion part 21. By this arrangement, a more bent structure is formed for the tab 2, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the insertion groove 124, the communication hole 125 and the exit groove 126.

[0056] In some implementation manners, the second bending part 24 is parallelly attached to the second surface 123. By arranging the second bending part 24 in a parallel attachment manner, the second bending part 24 is engaged with the connecting body 12 again, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, prevent the tab 2 and the conductive colloid from falling off from the insertion groove 124, the communication hole 125 and the exit groove 126, and can also make the overall structure more regular and compact, thereby reducing the overall height of the top cover.

[0057] In this embodiment, the connection method between a single tab 2 and a terminal 1 is demonstrated. By increasing the connection contact area between the single tab 2 and the terminal 1, the stability and firmness of the connection are ensured.

[0058] Embodiment 2

[0059] The difference from Embodiment 1 is as follows: Please refer to the attached Figure 5 - Attachment Figure 10 , the tab 2 includes a first tab 2A and a second tab 2B. Both the first tab 2A and the second tab 2B include a penetrating portion 21 and a first bending portion 22; the penetrating grooves include a first penetrating groove 124A and a second penetrating groove 124B; the communication holes 125 include a first communication hole 125A and a second communication hole 125B; the first penetrating groove 124A and the first communication hole 125A are arranged to communicate with each other, and the second penetrating groove 124B and the second communication hole 125B are arranged to communicate with each other; the penetrating portion 21 of the first tab 2A penetrates into the first penetrating groove 124A, and the first bending portion 22 of the first tab 2A penetrates into the first communication hole 125A; the penetrating portion 21 of the second tab 2B penetrates into the second penetrating groove 124B, and the first bending portion 22 of the second tab 2B penetrates into the second communication hole 125B.

[0060] In this embodiment, the connection method between the tab 2 and the terminal 1 is as follows: The penetrating portion 21 of the first tab 2A penetrates into the first penetrating groove 124A, the first bending portion 22 of the first tab 2A penetrates into the first communication hole 125A, the penetrating portion 21 of the second tab 2B penetrates into the second penetrating groove 124B, and the first bending portion 22 of the second tab 2B penetrates into the second communication hole 125B. Then, conductive adhesive is poured from the first penetrating groove 124A and / or the second penetrating groove 124B, and at least the first communication hole 125A and the second communication hole 125B are filled with the conductive adhesive. After the conductive adhesive cures to form a conductive colloid, the conductive colloid is in close contact with the first communication hole 125A and the second communication hole 125B, and thus the tab 2 and the terminal 1 are connected. The first bending portion 22 is wrapped in the conductive colloid and is in close contact with the conductive colloid, which can increase the contact area between the tab 2 and the terminal 1, improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the first penetrating groove 124A, the first communication hole 125A, the second penetrating groove 124B, and the second communication hole 125B. At the same time, increasing the contact area between the tab 2 and the terminal 1 can also effectively reduce the conduction resistance between the tab 2 and the terminal 1, reduce the risk of battery heating and damage, and improve the service life and application ability of the battery.

[0061] The first bending portion 22 is bent relative to the penetrating portion 21, such that the penetrating portion 21 and the first bending portion 22 of the tab 2 form an L-shaped structure, and the first bending portion 22 is wrapped in the conductive colloid, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the first penetration groove 124A, the first communication hole 125A, the second penetration groove 124B and the second communication hole 125B. Preferably, the first penetration groove 124A, the first communication hole 125A, the second penetration groove 124B and the second communication hole 125B are all filled with the conductive colloid, such that the conductive colloid is in close contact with the first penetration groove 124A, the first communication hole 125A, the second penetration groove 124B and the second communication hole 125B, and the penetrating portion 21 and the first bending portion 22 of the tab 2 are both wrapped in the conductive colloid and in close contact with the conductive colloid, which can increase the contact area between the tab 2 and the terminal 1 and improve the connection stability between the tab 2 and the terminal 1.

[0062] In addition, the second surface 123 is further provided with a penetration-out groove 126, and the penetration-out groove 126 includes a first penetration-out groove 126A and a second penetration-out groove 126B. The first penetration-out groove 126A is communicated with the first communication hole 125A, and the second penetration-out groove 126B is communicated with the second communication hole 125B; the first tab 2A and the second tab 2B both further include a penetration-out portion 23. The penetration-out portion 23 of the first tab 2A is connected to the first bending portion 22 of the first tab 2A and is bent in a direction close to the penetrating portion 21 of the first tab 2A, and the penetration-out portion 23 of the first tab 2A penetrates through the first penetration-out groove 126A. The penetration-out portion 23 of the second tab 2B is connected to the first bending portion 22 of the second tab 2B and is bent in a direction close to the penetrating portion 21 of the second tab 2B, and the penetration-out portion 23 of the second tab 2B penetrates through the second penetration-out groove 126B. By arranging that the penetration-out portion 23 of the first tab 2A penetrates through the first penetration-out groove 126A and the penetration-out portion 23 of the second tab 2B penetrates through the second penetration-out groove 126B, the penetrating portions 21, the first bending portions 22 and the penetration-out portions 23 of the two tabs 2 form a U-shaped structure, which can further improve the connection stability between the tab 2 and the terminal 1, make the connection more firm, and prevent the tab 2 and the conductive colloid from falling off from the first penetration groove 124A, the first communication hole 125A, the first penetration-out groove 126A, the second penetration groove 124B, the second communication hole 125B and the second penetration-out groove 126B. Preferably, the first penetration groove 124A, the first communication hole 125A, the first penetration-out groove 126A, the second penetration groove 124B, the second communication hole 125B and the second penetration-out groove 126B are all filled with the conductive colloid, which can further increase the contact area between the tab 2 and the connecting body 12 and improve the stability and firmness of the connection.

[0063] In some embodiments, the first insertion slot 124A is disposed outside the body 121 relative to the first extraction slot 126A, and the second insertion slot 124B is disposed outside the body 121 relative to the second extraction slot 126B. With this arrangement, both the first insertion slot 124A and the second insertion slot 124B are provided outside the body 121, which is more in line with the actual production situation. When the first battery cell and the second battery cell are placed outside the top cover, the first tab 2A of the first battery cell penetrates into the first insertion slot 124A from the outside and penetrates out from the first extraction slot 126A on the inside, and the second tab 2B of the second battery cell penetrates into the second insertion slot 124B from the outside and penetrates out from the second extraction slot 126B on the inside, and conductive adhesive is poured into the first extraction slot 126A and the second extraction slot 126B on the inside. This can ensure that there is sufficient operating space during the operation of pouring the conductive adhesive, thereby avoiding interference with the first battery cell, the first tab 2A, the second battery cell, or the second tab 2B on the outside when pouring the conductive adhesive, and improving the operation convenience.

[0064] Please refer to the appendix Figure 7 , one end of one side of the body 121 is provided with a first side end 1211, the other end of the other side of the body 121 is provided with a second side end 1212, the first insertion slot 124A, the first communication hole 125A, and the first extraction slot 126A are disposed on one side of the body 121 and extend to the first side end 1211, and the second insertion slot 124B, the second communication hole 125B, and the second extraction slot 126B are disposed on the other side of the body 121 and extend to the second side end 1212.

[0065] With the above arrangement, since the first insertion slot 124A, the first communication hole 125A, and the first extraction slot 126A extend to the first side end 1211, and the second insertion slot 124B, the second communication hole 125B, and the second extraction slot 126B extend to the second side end 1212, the width of the tab 2 can be extended accordingly, thereby further increasing the contact area between the tab 2 and the terminal post 1, improving the connection stability between the tab 2 and the terminal post 1, making the connection more firm, and avoiding the tab 2 and the conductive colloid from falling off from the insertion slot, the communication hole, and the extraction slot. At the same time, increasing the contact area between the tab 2 and the terminal post 1 can also effectively reduce the conduction resistance between the tab 2 and the terminal post 1, reduce the risk of battery heating and damage, and improve the service life and application ability of the battery.

[0066] Embodiment 3

[0067] The difference from Example 1 is that: the second surface 123 is further provided with a common groove 127, and the common groove 127 is respectively communicated with the first communication hole and the second communication hole. The common groove 127 simultaneously forms a first penetration groove and a second penetration groove, or the common groove 127 simultaneously forms a first through groove and a second through groove. Through the above settings, conductive adhesive can be poured into any one of the three grooves, which improves the operation convenience, reduces the consumption of conductive adhesive, and lowers the production cost. Moreover, after the conductive adhesive cures in the communication holes and the three grooves to form a conductive colloid, it can be connected into a whole, further improving the connection stability between the tab 2 and the terminal 1, making the connection more firm, and preventing the tab 2 and the conductive colloid from falling off from the communication holes and the three grooves.

[0068] In this embodiment, the connection method between two tabs and the terminal 1 of another structure is shown. One of the connection methods is as follows. Please refer to the attached Figure 11 - attached Figure 15 , when the common groove 127 simultaneously forms a first through groove and a second through groove, the penetration part 21 of the first tab 2A penetrates into the first penetration groove 124A, the first bending part 22 of the first tab 2A penetrates into the first communication hole 125A, and the through part 23 of the first tab 2A passes through the common groove 127; the penetration part 21 of the second tab 2B penetrates into the second penetration groove 124B, the first bending part 22 of the second tab 2B penetrates into the second communication hole 125B, and the through part 23 of the second tab 2B passes through the common groove 127.

[0069] The second connection method is that when the common groove simultaneously forms a first penetration groove and a second penetration groove, the connection method is that the penetration part of the first tab penetrates into the common groove, the first bending part of the first tab penetrates into the first communication hole, and the through part of the first tab penetrates into the first through groove; the penetration part of the second tab penetrates into the common groove, the first bending part of the second tab penetrates into the second communication hole, and the through part of the second tab penetrates into the second through groove.

[0070] Through the above settings, diverse connection methods between two tabs and the connector 12 are realized, which facilitates the operator to flexibly switch the connection method between the tab and the terminal 1 according to production requirements, improves the connection diversity, so as to meet the requirements of different battery production processes, and has high flexibility.

[0071] Example 4

[0072] On the basis of the above embodiment, this embodiment provides a battery 3, such as Figure 16 , including the above connection structure. By setting the connection method of the tab and the terminal through this connection structure, the connection stability between the two is ensured, the production yield of the battery is improved, and the battery quality is guaranteed.

[0073] In the description of the present utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0074] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] In the description of the present utility model, it should be noted that the terms indicating orientation or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0076] In addition, terms such as "horizontal", "vertical", "hanging" and the like do not mean that the component is required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0077] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being above, over and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0078] Although the description of the present utility model is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, improvements and variations are included within the spirit and scope of the appended claims.

Claims

1. A connection structure between a tab and a terminal, characterized in that It includes a terminal post, a tab and a conductive colloid, and the terminal post is connected to the tab through the conductive colloid; The terminal post includes a column body and a connecting body. The connecting body includes a main body, a first surface and a second surface oppositely arranged on the main body. The column body is connected to the first surface; a penetrating groove is provided on the second surface, a communicating hole is provided inside the main body, and the penetrating groove and the communicating hole are communicated with each other; The tab includes a penetrating part and a first bending part. The first bending part is connected to the penetrating part and is bent relative to the penetrating part. The penetrating part penetrates into the penetrating groove, the first bending part penetrates into the communicating hole, and the conductive colloid is at least arranged in the communicating hole.

2. The connection structure between the tab and the terminal according to claim 1, characterized in that, The second surface is further provided with an exiting groove, and the exiting groove is communicated with the communicating hole; the tab further includes an exiting part, the exiting part is connected to the first bending part and is bent in a direction close to the penetrating part, and the exiting part penetrates into the exiting groove.

3. The connection structure between the tab and the terminal according to claim 2, characterized in that, The tab further includes a second bending part, and the second bending part is connected to the exiting part and is bent in a direction close to or away from the penetrating part.

4. The connection structure between the tab and the terminal according to claim 3, characterized in that, The second bending part is parallelly attached to the second surface.

5. A connection structure between a tab and a terminal according to any one of claims 1-4, characterized in that, The tab includes a first tab and a second tab, and both the first tab and the second tab include the penetrating part and the first bending part; The penetrating groove includes a first penetrating groove and a second penetrating groove; The communicating hole includes a first communicating hole and a second communicating hole; The first penetrating groove is communicated with the first communicating hole, and the second penetrating groove is communicated with the second communicating hole; The penetrating part of the first tab penetrates into the first penetrating groove, and the first bending part of the first tab penetrates into the first communicating hole; The penetrating part of the second tab penetrates into the second penetrating groove, and the first bending part of the second tab penetrates into the second communicating hole.

6. The connection structure between the tab and the terminal according to claim 5, characterized in that, The second surface is further provided with an exiting groove, the exiting groove includes a first exiting groove and a second exiting groove, the first exiting groove is communicated with the first communicating hole, and the second exiting groove is communicated with the second communicating hole; Both the first tab and the second tab further include an exiting part. The exiting part of the first tab is connected to the first bending part of the first tab and is bent in a direction close to the penetrating part of the first tab. The exiting part of the first tab penetrates into the first exiting groove. The exiting part of the second tab is connected to the first bending part of the second tab and is bent in a direction close to the penetrating part of the second tab. The exiting part of the second tab penetrates into the second exiting groove.

7. The connection structure between the tab and the terminal according to claim 6, wherein, The first penetrating groove is arranged outside the main body relative to the first exiting groove, and the second penetrating groove is arranged outside the main body relative to the second exiting groove.

8. The connection structure between the tab and the terminal according to claim 6, characterized in that One end of the main body is provided with a first side end, and the other end of the main body is provided with a second side end. The first penetrating groove, the first communicating hole and the first exiting groove are arranged on one side of the main body and extend to the first side end. The second penetrating groove, the second communicating hole and the second exiting groove are arranged on the other side of the main body and extend to the second side end.

9. The connection structure between a tab and a terminal according to claim 6, wherein The second surface is further provided with a common groove, the common groove is respectively communicated with the first communication hole and the second communication hole, the common groove simultaneously forms the first penetration groove and the second penetration groove, or the common groove simultaneously forms the first through groove and the second through groove.

10. A battery, characterized in that, Comprising the connection structure according to any one of claims 1-9.

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