Battery and electric device

Abstract

The utility model provides a kind of battery and electric equipment, battery includes shell, electric core, pole and insulating glue, shell has the chamber and pole hole of intercommunication;Electric core is located in chamber;Pole includes first connecting part and second connecting part, first connecting part is located in chamber and is electrically connected with electric core, second connecting part is worn in pole hole, one end of second connecting part is connected with first connecting part, the other end of second connecting part is exposed outside chamber;First connecting part and the inner surface of shell are all bonded with insulating glue, and insulating glue seals pole hole.The assembly of the battery is more convenient, and the assembly cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and electrical equipment. Background Technology

[0002] Batteries with rigid casings such as steel or aluminum offer higher energy density, safety, and cycle retention compared to pouch cells. Therefore, these batteries utilize rigid casings. Batteries are widely used, especially in consumer electronics. For batteries with rigid casings such as steel or aluminum, the battery terminals are usually connected to the casing by riveting, which makes battery assembly more complex and costly. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery that is easy to assemble and has a low assembly cost.

[0004] This utility model also proposes an electrical device that includes the above-mentioned battery.

[0005] A battery according to a first aspect of the present invention includes: a casing having interconnected chambers and terminal holes; a battery cell located within the chambers; a terminal hole including a first connecting portion and a second connecting portion, the first connecting portion being located within the chambers and electrically connected to the battery cell, the second connecting portion passing through the terminal hole, one end of the second connecting portion being connected to the first connecting portion, and the other end of the second connecting portion protruding outside the chambers; and an insulating adhesive, wherein the first connecting portion and the inner surface of the casing are both bonded to the insulating adhesive, and the insulating adhesive seals the terminal hole.

[0006] The battery according to the first aspect of the present invention has at least the following beneficial effects: During the assembly of the battery, the terminal post can be placed inside the main body first, and then the insulating adhesive is attached to the surface of the first connection part; next, the second connection part of the terminal post is inserted into the terminal post hole, and the first connection part presses the insulating adhesive onto the inner surface of the outer shell, thereby bonding and fixing the main body and the terminal post together.

[0007] In this embodiment, the terminals are bonded to the casing with insulating adhesive, resulting in a simple battery structure and easy assembly. The terminals of this battery do not require rivets, and the terminals and casing are not connected by riveting. Expensive riveting equipment is not needed during battery assembly. Therefore, the assembly cost of this battery is relatively low.

[0008] Furthermore, when the battery experiences an internal short circuit due to unforeseen circumstances (such as impact or collision), causing the internal temperature to become excessively high, the insulating adhesive can melt upon heating. After the insulating adhesive melts, a gap is created between the terminal and the terminal hole in the outer casing. This gap can act as a pressure relief channel, allowing the high-temperature, high-pressure gas inside the battery to escape to the outside of the casing, thereby preventing the battery from exploding.

[0009] According to some embodiments of the present invention, the pole post is provided with a groove, and the opening of the groove is located on the end face of the second connecting part that is exposed outside the chamber.

[0010] According to some embodiments of this utility model, the thickness of the pole post is H1, the depth of the groove is H2, and 0.6≤H2 / H1≤0.8.

[0011] According to some embodiments of the present invention, along the thickness direction of the pole post, the projected area of ​​the end face in the first connecting part is S1, the projected area of ​​the opening of the groove in the first connecting part is S2, and S2 / S1≤0.27.

[0012] According to some embodiments of the present invention, the first connecting portion protrudes from the outer peripheral edge of the second connecting portion, the insulating adhesive includes a third connecting portion, the third connecting portion is stacked with the first connecting portion, the third connecting portion is located between the first connecting portion and the inner surface of the outer shell, and the third connecting portion surrounds the second connecting portion.

[0013] According to some embodiments of the present invention, the insulating adhesive further includes a fourth connecting portion, which is connected to the third connecting portion. The fourth connecting portion is located inside the pole hole and covers the hole wall of the pole hole, so that the second connecting portion is separated from the hole wall.

[0014] According to some embodiments of this utility model The bonding area between the third connecting part and the first connecting part is S3, and the bonding area between the third connecting part and the inner surface is S4, where 1.05 < S4 / S3 < 2.5.

[0015] According to some embodiments of the present invention, the positive electrode tab of the battery cell is electrically connected to the terminal post, and the battery further includes a positive electrode connecting piece, which is located outside the chamber and connected to the terminal post.

[0016] According to some embodiments of the present invention, the positive electrode tab of the battery cell is electrically connected to the terminal post, the negative electrode tab of the battery cell is electrically connected to the inner surface of the outer casing, and the battery further includes a negative electrode connecting piece, which is located outside the chamber and connected to the outer surface of the outer casing.

[0017] The electrical device according to a second aspect of the present invention includes a battery as described in the first aspect embodiment.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a top view of a battery according to an embodiment of the present invention; Figure 2 for Figure 1 A 3D view of the battery shown; Figure 3 for Figure 2 The exploded view of the battery shown (cells omitted); Figure 4 for Figure 3 A three-dimensional diagram of the pole shown; Figure 5 for Figure 1 The battery shown is a cross-sectional view along section AA (cells omitted). Reference numerals: 101-Battery, 102-Casing, 103-Cell, 104-Terminal, 105-Positive electrode connector, 106-Seal, 107-Negative electrode connector, 108-Cover, 109-Main body, 110-Cavity, 111-Insulating adhesive, 112-Terminal hole, 113-Injection hole, 114-First connection part, 115-Second connection part, 116-Groove, 117-End face, 118-Third connection part, 119-Fourth connection part. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Figures 1 to 3 A battery 101 according to an embodiment of the present invention is shown. The battery 101 includes a casing 102, a battery cell 103, terminals 104, and insulating adhesive 111. The casing 102 has a chamber 110 and a terminal hole 112, which are interconnected. Specifically, the casing 102 can be a steel casing, and may include a main body 109 and a cover 108, which are welded together to form a chamber 110. The terminal hole 112 may be formed on the main body 109. The battery cell 103 is located within the chamber 110, and the battery cell 103 can be a laminated cell or a wound cell. Figure 4 The pole post 104 in this embodiment is shown, as follows: Figure 4 As shown, the electrode 104 includes a first connecting portion 114 and a second connecting portion 115. The electrode 104 is a conductor; for example, it may be made of aluminum. The first connecting portion 114 is used for electrical connection with the battery cell 103; for example, the first connecting portion 114 is soldered to the tab of the battery cell 103. Figure 5 As shown, the first connecting part 114 is located inside the chamber 110, and the second connecting part 115 passes through the electrode hole 112. One end of the second connecting part 115 is connected to the first connecting part 114, and the other end of the second connecting part 115 protrudes outside the chamber 110. The first connecting part 114 and the inner surface of the outer shell 102 are both bonded with insulating adhesive 111, and the insulating adhesive 111 seals the electrode hole 112. The inner surface is the surface of the outer shell 102 facing the chamber 110. In this embodiment, the insulating adhesive 111 is bonded to the main body 109. Sealing the electrode hole 112 with insulating adhesive 111 means that the insulating adhesive 111 prevents air and water from the external environment from entering the chamber 110, and prevents the electrolyte inside the chamber 110 from leaving the chamber 110.

[0025] During the assembly of the battery 101, the terminal 104 can be placed inside the main body 109 first, and then the insulating adhesive 111 is attached to the surface of the first connecting part 114. Next, the second connecting part 115 of the terminal 104 is inserted into the terminal hole 112, and the first connecting part 114 presses the insulating adhesive 111 onto the inner surface of the outer shell 102, thereby bonding and fixing the main body 109 and the terminal 104 together.

[0026] In this embodiment, the terminal 104 is bonded to the outer casing 102 using insulating adhesive 111. The battery 101 in this embodiment has a simple structure and is easy to assemble. The terminal 104 of the battery 101 in this embodiment does not need to be rivet-type, and the terminal 104 and the outer casing 102 do not need to be connected by riveting. Expensive riveting equipment is not required during the assembly of the battery 101. Therefore, the assembly cost of the battery 101 in this embodiment is relatively low.

[0027] Furthermore, when the internal temperature of battery 101 becomes excessively high due to unforeseen circumstances (such as impact or collision causing an internal short circuit), the insulating adhesive 111 can melt upon heating. After the insulating adhesive 111 melts, a gap is created between the terminal post 104 and the terminal post hole 112 of the outer casing 102. This gap serves as a pressure relief channel, allowing high-temperature, high-pressure gas inside battery 101 to escape from the outer casing 102, thereby preventing battery 101 from exploding. In some embodiments, the melting point of the insulating adhesive 111 can be between 100°C and 150°C (including endpoint values).

[0028] like Figure 3 As shown, the battery 101 also includes a positive electrode connecting piece 105 and a negative electrode connecting piece 107, both of which are conductors. In this embodiment, the terminal 104 is the positive terminal 104. The first connecting portion 114 of the terminal 104 is connected to the positive electrode tab (not shown) of the battery cell 103. The connection between the first connecting portion 114 and the positive electrode tab can be welding. The negative electrode tab (not shown) of the battery cell 103 is welded to the inner surface of the outer casing 102, thereby achieving an electrical connection between the negative electrode tab and the inner surface of the outer casing 102. The negative electrode connecting piece 107 is located outside the chamber 110 and is connected to the outer surface of the outer casing 102. The connection between the negative electrode connecting piece 107 and the outer casing 102 can also be welding. The positive electrode connector 105 and the negative electrode connector 107 are provided to facilitate the packaging of multiple batteries 101 into a battery 101 module or a battery 101 pack. The connectors on different batteries 101 can be connected to each other, thereby allowing multiple batteries 101 to be connected in series or in parallel.

[0029] It should be noted that the positive electrode connector 105 and the negative electrode connector 107 are not essential. In some other embodiments not shown, the battery 101 does not have the positive electrode connector 105 and the negative electrode connector 107. The terminal 104 can directly contact some external conductive components (such as conductive springs, contacts, etc.), and the outer casing 102 can directly contact other external conductive components, thereby enabling the battery 101 to supply power.

[0030] like Figure 3 As shown, the main body 109 of the outer casing 102 is also provided with an injection hole 113, which communicates with the chamber 110. The battery 101 also includes a seal 106, which can be welded to the outer casing 102 and covers and seals the injection hole 113. During the manufacturing process of the battery 101, electrolyte can be injected into the chamber 110 through the injection hole 113. After the electrolyte injection is completed, the injection hole 113 can be sealed using the seal 106.

[0031] like Figure 5 As shown, the electrode post 104 has a groove 116, the opening of which is located on the end face 117 of the second connecting portion 115 that protrudes outside the chamber 110. The groove 116 on the electrode post 104 is provided to improve the welding efficiency between the electrode post 104 and the positive electrode tab of the battery cell 103. The groove 116 can be entirely located within the second connecting portion 115, or partially located within the second connecting portion 115 and partially within the first connecting portion 114. For example, assuming the electrode post 104 and the positive electrode tab of the battery cell 103 are welded by laser, because the electrode post 104 has the groove 116, the laser can penetrate into the groove 116, allowing the electrode tab and the first connecting portion 114 to heat up rapidly, thereby improving the welding efficiency between the electrode post 104 and the positive electrode tab.

[0032] like Figure 5 As shown, the thickness of the pole post 104 is H1, and the depth of the groove 116 is H2. H1 and H2 satisfy the condition: 0.6 ≤ H2 / H1 ≤ 0.8. More specifically, the ratio of H2 to H1 can be 0.6, 0.65, 0.7, 0.75, 0.8, etc. When the ratio of H2 to H1 satisfies the above condition, the depth of the groove 116 is moderate. The groove 116 is neither too shallow, resulting in low welding efficiency, nor too deep, resulting in low structural strength of the pole post 104.

[0033] Along the thickness direction of the pole post 104, the projected area of ​​the end face 117 on the first connecting portion 114 is S1, and the area of ​​the projected area of ​​the opening of the groove 116 on the first connecting portion 114 is S2. S1 and S2 satisfy: S2 / S1≤0.27. When the ratio of S2 to S1 satisfies the above condition, the size of the opening of the groove 116 is moderate. The opening is not too small, which would make it difficult for the laser to enter the groove 116, that is, the opening is not too small, which would affect the welding efficiency; nor is the opening too large, which would result in low structural strength of the pole post 104.

[0034] With the groove 116 provided in the terminal post 104, the battery 101 does not need to have a long lead wire between the terminal post 104 and the tab of the cell 103. The terminal post 104 and the tab can be directly welded. This means that the battery 101 can be spared the lead wire, the casing 102 can accommodate a larger cell 103, and the battery 101 can achieve an excessively high energy density.

[0035] like Figure 3 As shown, the first connecting portion 114 protrudes outward from the edge relative to the second connecting portion 115. The insulating adhesive 111 can be double-sided adhesive, with both sides being adhesive. The insulating adhesive 111 includes a third connecting portion 118, with a through hole at its center, through which the second connecting portion 115 of the pole post 104 can pass. Figure 5 As shown, the third connecting portion 118 is stacked on top of the first connecting portion 114, and the third connecting portion 118 is located between the first connecting portion 114 and the inner surface of the housing 102. In this way, the insulating adhesive 111 bonds the terminal and the housing 102 together. Furthermore, the third connecting portion 118 surrounds the second connecting portion 115, so even if air or water from the external environment passes through the terminal hole 112, the third connecting portion 118 will prevent this air and water from further entering the chamber 110.

[0036] like Figure 5 As shown, the insulating adhesive 111 also includes a fourth connecting portion 119, which is connected to the third connecting portion 118. The fourth connecting portion 119 is located inside the through hole and covers the hole wall of the terminal hole 112, separating the hole wall of the terminal hole 112 from the second connecting portion 115. This arrangement can further reduce the risk of short circuit between the positive and negative terminals of the battery 101. As mentioned above, the negative electrode tab of the cell 103 is electrically connected to the outer casing 102, and the positive electrode tab of the cell 103 is electrically connected to the terminal 104. Therefore, it is necessary to prevent the terminal 104 from directly contacting the outer casing 102, otherwise the battery 101 will experience an internal short circuit. In this embodiment, the fourth connecting portion 119 of the insulating adhesive 111 is placed inside the terminal hole 112 to prevent the terminal 104 from directly contacting the hole wall of the terminal hole 112, thereby preventing a short circuit between the positive and negative terminals of the battery 101.

[0037] It should be noted that during the process of pressing the insulating adhesive 111 onto the inner surface of the outer casing 102, the insulating adhesive 111 can be heated while maintaining pressure, causing a portion of the insulating adhesive 111 to melt. The melted insulating adhesive 111 will then enter the through hole. After heating is stopped and this portion of the insulating adhesive 111 solidifies, it serves as the fourth connecting part 119. The insulating adhesive 111 can be heated by blowing hot air onto it, or by pressing the first connecting part 114 of the pole post 104 with a high-temperature pressure plate. The heat from the pressure plate is then transferred sequentially to the first connecting part 114 and the insulating adhesive 111, thereby heating the insulating adhesive 111.

[0038] The bonding area between the third connecting part 118 and the first connecting part 114 is S3, and the bonding area between the third connecting part 115 and the inner surface of the outer casing 102 is S4. S3 and S4 satisfy: 1.05 < S4 / S3 < 2.5. Here, the bonding area between the third connecting part 118 and the first connecting part 114 refers to the area of ​​the surface of the third connecting part 118 facing the first connecting part 114, and the bonding area between the third connecting part 118 and the inner surface of the outer casing 102 refers to the area of ​​the surface of the third connecting part 118 facing away from the first connecting part 114. This arrangement ensures that the area of ​​the third connecting part 118 is moderate; the bonding area of ​​the third connecting part 118 is not too small, resulting in insufficient bonding effect, nor is the bonding area of ​​the third connecting part 118 too large, resulting in excessive cost of the battery 101.

[0039] The battery 101 of any of the above embodiments can be used in electrical devices, such as mobile phones, tablets, smartwatches, and other electronic devices.

[0040] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery, characterized in that, include: The outer shell has interconnected chambers and pole holes; The battery cell is located within the cavity; The electrode post includes a first connecting part and a second connecting part. The first connecting part is located in the cavity and is electrically connected to the battery cell. The second connecting part passes through the electrode post hole. One end of the second connecting part is connected to the first connecting part, and the other end of the second connecting part protrudes outside the cavity. An insulating adhesive is used to bond the first connecting part and the inner surface of the outer shell, and the insulating adhesive seals the pole hole.

2. The battery according to claim 1, characterized in that, The pole post is provided with a groove, and the opening of the groove is located on the end face of the second connection portion that is exposed outside the chamber.

3. The battery according to claim 2, characterized in that, The thickness of the pole post is H1, and the depth of the groove is H2, where 0.6 ≤ H2 / H1 ≤ 0.

8.

4. The battery according to claim 2, characterized in that, Along the thickness direction of the pole post, the projected area of ​​the end face on the first connecting part is S1, and the projected area of ​​the opening of the groove on the first connecting part is S2, where S2 / S1≤0.

27.

5. The battery according to claim 1, characterized in that, The first connecting portion protrudes from the outer peripheral edge of the second connecting portion. The insulating adhesive includes a third connecting portion, which is stacked on top of the first connecting portion. The third connecting portion is located between the first connecting portion and the inner surface of the outer shell, and surrounds the second connecting portion.

6. The battery according to claim 5, characterized in that, The insulating adhesive also includes a fourth connecting part, which is connected to the third connecting part. The fourth connecting part is located inside the pole hole and covers the hole wall of the pole hole, so that the second connecting part is separated from the hole wall.

7. The battery according to claim 1, characterized in that, The bonding area between the third connecting part and the first connecting part is S3, and the bonding area between the third connecting part and the inner surface is S4, where 1.05 < S4 / S3 < 2.

5.

8. The battery according to claim 1, characterized in that, The positive electrode tab of the battery cell is electrically connected to the terminal post, and the battery also includes a positive electrode connecting piece, which is located outside the chamber and connected to the terminal post.

9. The battery according to claim 1, characterized in that, The positive electrode tab of the battery cell is electrically connected to the terminal post, and the negative electrode tab of the battery cell is electrically connected to the inner surface of the outer casing. The battery also includes a negative electrode connecting piece, which is located outside the chamber and connected to the outer surface of the outer casing.

10. Electrical equipment, characterized in that, Includes the battery as described in any one of claims 1 to 9.

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