Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a shell, an electrode connecting piece and a tab connecting piece, the electrode connecting piece is connected with the shell of the battery, the tab connecting piece is connected with the electrode connecting piece and a tab of the battery, a containing groove is formed in one of the tab connecting piece and the electrode connecting piece, and at least part of the other one of the tab connecting piece and the electrode connecting piece is inserted into the containing groove. According to the battery, the connection stability of the tab connecting piece and the electrode connecting piece is improved, so that the structural stability of the battery is improved.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No.

[0003] 202423033318.8, filed on December 09, 2024, with the Chinese Patent Office, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0004] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0005] Batteries are widely used in energy storage systems, vehicles, consumer electronics and other fields. The shell and the tab of the battery need to be connected together through a connecting structure.

[0006] In the related art, the stability of the connecting structure itself needs to be improved. UTILITY MODEL CONTENT

[0007] Embodiments of the present application provide a battery and an electric device, which can improve the technical problem of insufficient stability of the connecting structure itself.

[0008] In a first aspect, embodiments of the present application provide a battery, comprising:

[0009] a shell;

[0010] an electrode connecting piece connected with the shell of the battery;

[0011] a tab connecting piece connecting the electrode connecting piece and the tab of the battery;

[0012] One of the tab connecting piece and the electrode connecting piece is formed with a receiving groove, and the other of the tab connecting piece and the electrode connecting piece is at least partially inserted into the receiving groove.

[0013] In an embodiment, the other of the tab connecting piece and the electrode connecting piece has a body, which is inserted into the receiving groove.

[0014] In an embodiment, the other of the tab connecting piece and the electrode connecting piece is formed with a protruding portion, which is clamped in the receiving groove.

[0015] In an embodiment, the receiving groove includes a first receiving groove and a second receiving groove, the tab connecting piece is formed with the first receiving groove, at least part of the electrode connecting piece is inserted into the first receiving groove, the electrode connecting piece is formed with the second receiving groove, and at least part of the tab connecting piece is inserted into the second receiving groove.

[0016] In an embodiment, the electrode connecting piece comprises a first connecting section and a second connecting section, the second connecting section connects the first connecting section and the shell, the first connecting section is connected with the tab connecting piece; wherein,

[0017] One of the tab connecting piece and the first connecting section is formed with a receiving groove, and the other of the tab connecting piece and the first connecting section is at least partially inserted into the receiving groove.

[0018] In an embodiment, the tab connecting piece comprises a first tab connecting piece and a second tab connecting piece, the first tab connecting piece connects the second tab connecting piece and the electrode connecting piece, and the second tab connecting piece is used for connecting the tab.

[0019] One of the first tab connecting piece and the electrode connecting piece is formed with the receiving groove, and the other of the first tab connecting piece and the electrode connecting piece is at least partially inserted into the receiving groove.

[0020] In an embodiment, the first tab connecting piece is formed with the receiving groove, and the electrode connecting piece is inserted into the receiving groove.

[0021] In an embodiment, a groove depth of the receiving groove is E14, and E14≥10μm.

[0022] In an embodiment, a shortest distance between a side of a side wall surface of the receiving groove facing the electrode connecting piece and the side wall surface of the receiving groove is E17, and E17≥0.2mm.

[0023] In an embodiment, the first tab connecting piece comprises oppositely arranged first and second sides, the first side of the first tab connecting piece is formed with the receiving groove, and the second side of the first tab connecting piece is provided with an encapsulation part.

[0024] In an embodiment, along an axial direction of the shell, a height of the encapsulation part is E1, and E1≥0.4mm.

[0025] In an embodiment, the battery further comprises an encapsulation part,

[0026] The encapsulation part is provided at least partially at the electrode connecting piece; and / or,

[0027] The encapsulation part is provided at least partially at the tab connecting piece; and / or,

[0028] The encapsulation part is provided at a connection between the tab connecting piece and the electrode connecting piece.

[0029] In an embodiment, the tab connector is formed with the accommodating groove, the electrode connector is inserted into the accommodating groove, a gap is formed between the tab connector and the side wall surface of the accommodating groove, and at least part of the encapsulation portion is arranged in the gap.

[0030] In an embodiment, the depth of the accommodating groove is less than the thickness of the electrode connector.

[0031] In an embodiment, the tab connector is formed with the accommodating groove, the electrode connector is inserted into the accommodating groove, a gap is formed between the tab connector and the side wall surface of the accommodating groove, and at least part of the encapsulation portion is arranged in the gap.

[0032] In an embodiment, the depth of the accommodating groove is less than the thickness of the electrode connector.

[0033] In an embodiment, the encapsulation portion is arranged at the opening of the accommodating groove.

[0034] In an embodiment, the tab connector is in a bent structure, and the encapsulation portion is arranged at the bent part of the tab connector.

[0035] In a second aspect, an embodiment of the present application provides a power-using device, comprising the battery described above.

[0036] The beneficial effects of the embodiments of the present application are as follows:

[0037] In the embodiments of the present application, the accommodating groove can play a limiting role, so that one of the tab connector and the electrode connector can limit the other one, thereby improving the connection stability of the tab connector and the electrode connector, and further improving the structural stability of the battery itself. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0039] Figure 1 is a structural schematic diagram of a battery provided by an embodiment of the present application, wherein an electrode connector is inserted into a tab connector;

[0040] Figure 2 is one of partial structural schematic diagrams of a battery provided by an embodiment of the present application;

[0041] Figure 3is one of sectional views of a partial structure of a battery provided by an embodiment of the present application;

[0042] Figure 4 is one of sectional views of a partial structure of a battery provided by an embodiment of the present application;

[0043] Figure 5 is one of sectional views of a partial structure of a battery provided by an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the positional words such as “upper” and “lower” generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and “inner” and “outer” refer to the contour of the device.

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the positional words such as “upper” and “lower” generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and “inner” and “outer” refer to the contour of the device. Figures 1 to 5 The battery and the electric device of the present application are described below.

[0046] According to the embodiments of the first aspect of the present application, referring to Figure 1 , Figure 2 and Figure 3 , the battery comprises a shell 1, an electrode connecting piece 22 and a tab connecting piece 23, the electrode connecting piece 22 is connected with the shell 1 of the battery, and the tab connecting piece 23 connects the electrode connecting piece 22 and the tab of the battery.

[0047] One of the tab connecting piece 23 and the electrode connecting piece 22 is formed with a receiving groove 234, and the other of the tab connecting piece 23 and the electrode connecting piece 22 is at least partially inserted into the receiving groove 234.

[0048] According to the battery of the embodiments of the present application, the receiving groove 234 can play a limiting role, so that one of the tab connecting piece 23 and the electrode connecting piece 22 can limit the other of the tab connecting piece 23 and the electrode connecting piece 22, thereby improving the connection stability of the tab connecting piece 23 and the electrode connecting piece 22, and further improving the structural stability of the battery itself.

[0049] In some embodiments, the other of the tab connecting piece 23 and the electrode connecting piece 22 has a body, and the body is inserted into the receiving groove 234.

[0050] It can be understood that one of the tab connecting piece 23 and the electrode connecting piece 22 is formed with a receiving groove 234, and the body of the other of the tab connecting piece 23 and the electrode connecting piece 22 is inserted into the receiving groove 234, so that the other of the tab connecting piece 23 and the electrode connecting piece 22 is at least partially located in the receiving groove 234, thereby reducing the overall size of the battery and facilitating the miniaturization of the battery.

[0051] In some embodiments, the other of the tab connecting piece 23 and the electrode connecting piece 22 is formed with a protrusion, and the protrusion is clamped in the receiving groove 234.

[0052] It can be understood that one of the tab connecting piece 23 and the electrode connecting piece 22 is formed with a receiving groove 234, and the protrusion of the other of the tab connecting piece 23 and the electrode connecting piece 22 is clamped in the receiving groove 234, that is, the other of the tab connecting piece 23 and the electrode connecting piece 22 is not entirely inserted into the receiving groove 234, but only the protrusion is inserted into the receiving groove 234, thereby improving the connection stability of the electrode connecting piece 22 and the tab connecting piece 23 while reducing the connection area of the electrode connecting piece 22 and the tab connecting piece 23.

[0053] The smaller the connection area of the electrode connecting piece 22 and the tab connecting piece 23, the smaller the encapsulation part 3 provided at the connection of the electrode connecting piece 22 and the tab connecting piece 23 can be, facilitating the setting of the encapsulation part 3 and reducing the cost.

[0054] In some embodiments, the receiving groove 234 includes a first receiving groove and a second receiving groove, the tab connecting piece 23 is formed with the first receiving groove, and at least part of the electrode connecting piece 22 is inserted into the first receiving groove; the electrode connecting piece 22 is formed with the second receiving groove, and at least part of the tab connecting piece 23 is inserted into the second receiving groove.

[0055] It can be understood that the electrode connecting piece 22 is inserted into the first receiving groove of the tab connecting piece 23, and the first receiving groove can limit the electrode connecting piece 22, thereby improving the connection stability of the electrode connecting piece 22 and the tab connecting piece 23; the tab connecting piece 23 is inserted into the second receiving groove of the electrode connecting piece 22, and the second receiving groove can limit the tab connecting piece 23, thereby improving the connection stability of the electrode connecting piece 22 and the tab connecting piece 23. That is, the electrode connecting piece 22 and the tab connecting piece 23 can limit each other, effectively improving the connection stability of the electrode connecting piece 22 and the tab connecting piece 23 and ensuring the structural stability of the battery.

[0056] In some embodiments, referring to Figure 3The electrode connecting piece 22 comprises a first connecting section 223 and a second connecting section 224, the second connecting section 224 connects the first connecting section 223 and the shell 1, and the first connecting section 223 is connected with the tab connecting piece 23.

[0057] One of the tab connecting piece 23 and the first connecting section 223 is formed with the accommodating groove 234, and the other one of the tab connecting piece 23 and the first connecting section 223 is at least partially inserted into the accommodating groove 234.

[0058] It can be understood that the accommodating groove 234 can play a limiting role, so that one of the tab connecting piece 23 and the first connecting section 223 can limit the other one of the tab connecting piece 23 and the first connecting section 223, thereby improving the connection stability of the tab connecting piece 23 and the first connecting section 223, and further improving the structural stability of the battery itself.

[0059] In some embodiments, referring to Figure 1 and Figure 2 the tab connecting piece 23 comprises a first tab connecting piece 231 and a second tab connecting piece 232, the first tab connecting piece 231 connects the second tab connecting piece 232 and the electrode connecting piece 22, and the second tab connecting piece 232 is used for connecting the tab.

[0060] One of the first tab connecting piece 231 and the electrode connecting piece 22 is formed with the accommodating groove 234, and the other one of the first tab connecting piece 231 and the electrode connecting piece 22 is at least partially inserted into the accommodating groove 234.

[0061] It can be understood that the accommodating groove 234 can play a limiting role, so that one of the first tab connecting piece 231 and the electrode connecting piece 22 can limit the other one of the first tab connecting piece 231 and the electrode connecting piece 22, thereby improving the connection stability of the first tab connecting piece 231 and the electrode connecting piece 22, and further improving the structural stability of the battery itself.

[0062] In some embodiments, referring to Figure 1 and Figure 2 the first tab connecting piece 231 is formed with the accommodating groove 234, and the electrode connecting piece 22 is inserted into the accommodating groove 234, so that the first tab connecting piece 231 can play a limiting role on the electrode connecting piece 22.

[0063] Specifically, referring to Figure 1 and Figure 2 the groove depth of the accommodating groove 234 is E14, and E14≥10μm. It is ensured that the accommodating groove 234 can effectively limit the electrode connecting piece 22.

[0064] Specifically, referring to Figure 1 and Figure 5The shortest distance between the electrode connecting piece 22 and the side wall surface of the accommodating groove 234 is E17, and E17≥0.2mm. That is, the gap between the electrode connecting piece 22 and the side wall surface of the accommodating groove 234 is greater than or equal to 0.2mm, so that the packaging part 3 can be arranged between the electrode connecting piece 22 and the side wall surface of the accommodating groove 234, and the packaging part 3 can prevent impurities from entering the connection between the electrode connecting piece 22 and the tab connecting piece 23, thereby ensuring the connection stability of the electrode connecting piece 22 and the tab connecting piece 23.

[0065] Specifically, referring to Figure 1 and Figure 2 The first tab connecting piece 231 includes a first side and a second side arranged oppositely, and the first side of the first tab connecting piece 231 is provided with the accommodating groove 234, and the second side of the first tab connecting piece 231 is provided with the packaging part 3. It can be understood that the packaging part 3 and the accommodating groove 234 are respectively arranged on the opposite sides of the first tab connecting piece 231. During the production of the battery, the inner shrink part of the shell 1 can make the first tab connecting piece 231 bend towards the center of the shell 1, so that the packaging part 3 can be arranged at the bending part of the first tab connecting piece 231, thereby achieving the packaging protection of the bending part of the first tab connecting piece 231, avoiding the contact between the bending part of the first tab connecting piece 231 and other substances, and preventing the corrosion of the bending part of the first tab connecting piece 231.

[0066] Specifically, along the axial direction of the shell 1, the height of the packaging part 3 is E1, and E1≥0.4mm. The packaging part 3 can effectively protect the bending part of the first tab connecting piece 231.

[0067] In some embodiments, the battery further comprises the packaging part 3.

[0068] Specifically, at least part of the electrode connecting piece 22 is provided with the packaging part 3. Under the action of the packaging part 3, the position of the electrode connecting piece 22 provided with the packaging part 3 can avoid contact with other substances (such as electrolyte), so that the position of the electrode connecting piece 22 provided with the packaging part 3 is not easy to corrode, which can effectively slow down the corrosion speed of the entire electrode connecting piece 22, improve the structural stability of the electrode connecting piece 22, and further improve the structural stability of the battery.

[0069] Specifically, at least part of the tab connecting piece 23 is provided with the packaging part 3. Under the action of the packaging part 3, the position of the tab connecting piece 23 provided with the packaging part 3 can avoid contact with other substances (such as electrolyte), so that the position of the tab connecting piece 23 provided with the packaging part 3 is not easy to corrode, which can effectively slow down the corrosion speed of the entire tab connecting piece 23, improve the structural stability of the tab connecting piece 23, and further improve the structural stability of the battery.

[0070] Specifically, the connection part of the tab connecting piece 23 and the electrode connecting piece 22 is provided with the encapsulation part 3. Under the action of the encapsulation part 3, the connection part of the tab connecting piece 23 and the electrode connecting piece 22 can be prevented from contacting other substances (such as electrolyte), so that the connection part of the tab connecting piece 23 and the electrode connecting piece 22 is not easy to corrode, the corrosion speed of the connection part of the tab connecting piece 23 and the electrode connecting piece 22 can be effectively delayed, and the structural stability of the battery is improved.

[0071] In some embodiments, the tab connecting piece 23 is formed with the accommodating groove 234, the electrode connecting piece 22 is inserted into the accommodating groove 234, a gap is formed between the electrode connecting piece 22 and the side wall surface of the accommodating groove 234, and at least part of the encapsulation part 3 is arranged in the gap.

[0072] It can be understood that arranging at least part of the encapsulation part 3 in the gap can prevent other substances from appearing in the gap, thereby preventing the connection part of the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, so that the connection part of the electrode connecting piece 22 and the tab connecting piece 23 is not easy to corrode.

[0073] Specifically, the groove depth of the accommodating groove 234 is less than the thickness of the electrode connecting piece 22.

[0074] It can be understood that the tab connecting piece 23 is formed with the accommodating groove 234, and the electrode connecting piece 22 is inserted into the accommodating groove 234. The groove depth of the accommodating groove 234 is less than the thickness of the electrode connecting piece 22, so that at least part of the electrode connecting piece 22 can protrude from the accommodating groove 234, facilitating the connection of the electrode connecting piece 22 and the shell 1.

[0075] In some embodiments, the electrode connecting piece 22 is formed with the accommodating groove 234, the tab connecting piece 23 is inserted into the accommodating groove 234, a gap is formed between the tab connecting piece 23 and the side wall surface of the accommodating groove 234, and at least part of the encapsulation part 3 is arranged in the gap.

[0076] It can be understood that arranging at least part of the encapsulation part 3 in the gap can prevent other substances from appearing in the gap, thereby preventing the connection part of the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, so that the connection part of the electrode connecting piece 22 and the tab connecting piece 23 is not easy to corrode.

[0077] Specifically, the groove depth of the accommodating groove 234 is less than the thickness of the electrode connecting piece 22.

[0078] It can be understood that the electrode connecting piece 22 is formed with a receiving groove 234, and the tab connecting piece 23 is inserted into the receiving groove 234. The depth of the receiving groove 234 is less than the thickness of the tab connecting piece 23, so that at least part of the tab connecting piece 23 can protrude from the receiving groove 234, facilitating the connection of the tab connecting piece 23 and the tab.

[0079] In some embodiments, the receiving groove 234 is provided with an encapsulation part 3 at the groove opening.

[0080] It can be understood that when the electrode connecting piece 22 is arranged in the receiving groove 234 of the tab connecting piece 23, by arranging the encapsulation part 3 at the groove opening of the receiving groove 234, the encapsulation part 3 is connected with the electrode connecting piece 22. The encapsulation part 3 can encapsulate and isolate the position between the electrode connecting piece 22 and the groove opening of the receiving groove 234, so that the contact position of the electrode connecting piece 22 and the groove opening of the receiving groove 234 will not be in contact with other substances, and other substances will not enter the receiving groove 234, thereby effectively preventing corrosion of the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0081] When the tab connecting piece 23 is arranged in the receiving groove 234 of the electrode connecting piece 22, by arranging the encapsulation part 3 at the groove opening of the receiving groove 234, the encapsulation part 3 is connected with the tab connecting piece 23. The encapsulation part 3 can encapsulate and isolate the position between the tab connecting piece 23 and the groove opening of the receiving groove 234, so that the contact position of the tab connecting piece 23 and the groove opening of the receiving groove 234 will not be in contact with other substances, and other substances will not enter the receiving groove 234, thereby effectively preventing corrosion of the connection between the electrode connecting piece 22 and the tab connecting piece 23.

[0082] In some embodiments, the tab connecting piece 23 is a bent structure, and the encapsulation part 3 is arranged at the bending position of the tab connecting piece 23.

[0083] It can be understood that the encapsulation part 3 can prevent impurities from entering the bending position of the tab connecting piece 23, avoid the impurities affecting the strength of the bending position of the tab connecting piece 23, realize the encapsulation protection of the bending position of the tab connecting piece 23, avoid the bending position of the tab connecting piece 23 from being in contact with other substances, and prevent corrosion of the bending position of the tab connecting piece 23.

[0084] In some embodiments, the battery comprises a connecting piece 2 and an encapsulation part 3. The connecting piece 2 has an electrode connecting piece 22 and a tab connecting piece 23. The electrode connecting piece 22 is used to connect the electrode of the battery, and the tab connecting piece 23 is used to connect the tab of the battery.

[0085] At least part of the structure of the encapsulation part 3 is arranged at the connection position of the electrode connecting piece 22 and the tab connecting piece 23, and / or at least part of the structure of the encapsulation part 3 is arranged at the connection position of the electrode connecting piece 22 and the electrode of the battery.

[0086] According to the battery of the embodiment of the present application, by arranging the encapsulation part 3 at the connection between the electrode connecting part 22 and the tab connecting part 23, the encapsulation part 3 can prevent impurities from entering the connection between the electrode connecting part 22 and the tab connecting part 23, avoid the impurities affecting the connection strength of the electrode connecting part 22 and the tab connecting part 23, improve the connection stability of the electrode connecting part 22 and the tab connecting part 23, improve the structural stability of the connecting part 2, and further improve the connection stability between the tab of the battery and the electrode of the battery. By arranging the encapsulation part 3 at the connection between the electrode connecting part 22 and the electrode, the encapsulation part 3 can prevent impurities from entering the connection between the electrode connecting part 22 and the electrode, avoid the impurities affecting the connection strength of the electrode connecting part 22 and the electrode, improve the connection stability of the electrode connecting part 22 and the electrode, and further improve the connection stability between the tab of the battery and the electrode of the battery.

[0087] In some embodiments, the electrode of the battery comprises a battery shell or a battery pole.

[0088] It can be understood that when the electrode of the battery is the battery shell, the electrode connecting part 22 is connected with the battery shell, that is, the connecting part 2 connects the battery shell and the tab of the battery. When the electrode of the battery is the battery pole, the electrode connecting part 22 is connected with the battery pole, that is, the connecting part 2 connects the battery pole and the tab of the battery.

[0089] In some examples, the impurities are, for example, electrolyte.

[0090] In some examples, the encapsulation part 3 is arranged at least partially on the connecting part 2, which can be arranged at the bending part of the connecting part 2, or arranged on the entire connecting part 2, or arranged at the end of the connecting part 2 connected with the shell 1.

[0091] In some examples, at least part of the structure of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the shell 1, which means that part of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the shell 1, and another part of the encapsulation part 3 is arranged at other positions of the connecting part 2.

[0092] In some examples, at least part of the structure of the encapsulation part 3 is arranged at the connection between the connecting part 2 and the shell 1, which means that the encapsulation part 3 is arranged on the circumferential side of the connection between the connecting part 2 and the shell 1, or arranged on the connection between the connecting part 2 and the shell 1.

[0093] In some examples, the encapsulation part 3 is, for example, encapsulation glue, and the material of the encapsulation glue is polyurethane type, epoxy resin type, anaerobic glue, UV glue, acrylic type, hot melt glue, etc., and the elastic modulus of the encapsulation glue is between 0.1 Gpa and 6 Gpa.

[0094] Specifically, the electrode connecting piece 22 is provided with the packaging part 3 at the connection position of the electrode connecting piece 22 and the electrode of the battery.

[0095] It can be understood that, by providing the packaging part 3 at the connection position of the electrode connecting piece 22 and the electrode of the battery, the packaging part 3 can prevent the connection position of the electrode connecting piece 22 and the electrode of the battery from contacting other substances, avoid the connection strength of the electrode connecting piece 22 and the electrode of the battery being affected by other substances, ensure the connection strength of the electrode connecting piece 22 and the electrode, improve the stability of the connection of the electrode connecting piece 22 and the electrode, and thus make the connecting piece 2 be able to stably connect the electrode and the tab, and improve the stability of the connection of the electrode and the tab.

[0096] Specifically, the electrode connecting piece 22 is provided with the packaging part 3 at the connection position of the electrode connecting piece 22 and the tab connecting piece 23.

[0097] It can be understood that, by providing the packaging part 3 at the connection position of the electrode connecting piece 22 and the tab connecting piece 23, the packaging part 3 can prevent the connection position of the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, avoid the connection strength of the electrode connecting piece 22 and the tab connecting piece 23 being affected by other substances, ensure the connection strength of the electrode connecting piece 22 and the tab connecting piece 23, improve the structural stability of the connecting piece 2, and thus make the connecting piece 2 be able to stably connect the electrode and the tab of the battery, and improve the stability of the connection of the electrode and the tab of the battery.

[0098] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both in contact with the packaging part 3.

[0099] It can be understood that, at the connection position of the electrode connecting piece 22 and the tab connecting piece 23, one part of the packaging part 3 is in contact with the electrode connecting piece 22, and another part of the packaging part 3 is in contact with the tab connecting piece 23, which ensures that the packaging part 3 can effectively package the connection position of the electrode connecting piece 22 and the tab connecting piece 23, effectively prevent impurities from entering the connection position of the electrode connecting piece 22 and the tab connecting piece 23, and improve the connection stability of the electrode connecting piece 22 and the tab connecting piece 23.

[0100] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both in contact with the packaging part 3.

[0101] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both in contact with the packaging part 3.

[0102] It can be understood that at the connection between the electrode connecting piece 22 and the electrode of the battery, one part of the packaging portion 3 is in contact with the electrode connecting piece 22, and another part of the packaging portion 3 is in contact with the electrode, so that the packaging portion 3 can effectively package the connection between the electrode connecting piece 22 and the electrode, effectively prevent impurities from entering the connection between the electrode connecting piece 22 and the electrode, and improve the connection stability of the electrode connecting piece 22 and the electrode.

[0103] For example, the packaging portion 3 has at least two connecting surfaces, one of which is in contact with the electrode connecting piece 22 at the connection between the electrode connecting piece 22 and the electrode, and the other is in contact with the electrode.

[0104] In some embodiments, the battery includes a shell 1, and the connection between the electrode connecting piece 22 and the shell 1 is provided with a packaging portion 3.

[0105] It can be understood that the packaging portion 3 can prevent impurities from entering the connection between the electrode connecting piece 22 and the shell 1, and avoid affecting the connection strength of the electrode connecting piece 22 and the shell 1.

[0106] Specifically, the packaging portion extends to the side wall surface of the shell and abuts against the side wall surface of the shell, so that the packaging portion can effectively package the connection between the electrode connecting piece 22 and the shell 1, and prevent impurities from entering the connection between the electrode connecting piece 22 and the shell 1.

[0107] In some embodiments, the tab connecting piece 23 is arranged apart from the shell 1.

[0108] It can be understood that the tab connecting piece 23 is arranged apart from the shell 1, so that the tab connecting piece 23 will not be in direct contact with the shell 1, reducing the connection points of the connecting piece 2 and the shell 1, and avoiding corrosion and other problems caused by the contact between the tab connecting piece 23 and the shell 1.

[0109] In some examples, the electrode connecting piece 22 is connected to the tab connecting piece 23 by surface chemical treatment, such as electroplating, chemical plating, and spraying. It can also be connected to the tab connecting piece 23 by surface physical treatment, such as composite metal stamping.

[0110] In some examples, the tab connecting piece 23 and the electrode connecting piece 22 can be connected together by welding, cold upsetting, thermal compounding, jointing, riveting, heat shrink tube, etc. The electrode connecting piece 22 and the shell 1 can be connected by laser welding, spot welding, resistance welding, etc.

[0111] In some examples, the tab connector 23 comprises a first contact surface in contact with the electrode connector 22, the electrode connector 22 comprises a second contact surface in contact with the tab connector 23, and the first contact surface and / or the second contact surface is provided with a protrusion / groove / rough surface / embossed structure to increase the contact area of the tab connector 23 and the electrode connector 22.

[0112] In some examples, the tab connector 23 is made of copper, and the electrode connector 22 is made of nickel-plated steel strip, nickel strip, or stainless steel.

[0113] In some embodiments, one of the shell 1, the electrode connector 22 and the tab connector 23 is a first metal piece, and the other two are second metal pieces, the first metal piece and the second metal pieces are made of different metal materials, and the connection between the first metal piece and the second metal piece is provided with the encapsulation part 3. The first metal material and the second metal material are different.

[0114] It can be understood that, by providing the encapsulation part 3 at the connection between the first metal piece and the second metal piece, i.e. at the contact position of the different metal materials, the encapsulation part 3 can prevent the connection between the first metal piece and the second metal piece from contacting other substances (such as electrolyte), so that the connection between the first metal piece and the second metal piece is not prone to corrosion, thereby improving the structural stability of the connector 2 or the connection between the connector 2 and the shell 1, so that the connector 2 can stably connect the shell 1 and the tab.

[0115] It can be understood that, by including two different metal materials in the shell 1, the electrode connector 22 and the tab connector 23, the stability of the connection between the connection part 21 and the shell 1 can be effectively ensured.

[0116] For example, the first metal piece is made of a first metal material, the second metal piece is made of a second metal material, and the first metal material and the second metal material are different.

[0117] It should be noted that the metal material includes a plurality of metal atoms, and the two metal materials respectively include two groups of metal atoms. As long as one metal atom in one group is different from the metal atoms in the other group, the two metal materials can be considered as different metal materials. That is, as long as there is one different metal atom between the first metal material and the second metal material, the first metal material and the second metal material can be considered as different.

[0118] The metal material can be pure metal, alloy, or metal matrix composite material with one or more insoluble solid particles.

[0119] The metal material can be a multi-layer structure, for example, the metal material can include a base material and a metal layer arranged on the base material. The metal layer can be formed on the base material by electroplating, CVD, or the like. The metal layer can be pure metal or alloy, or a metal matrix composite material with one or more insoluble solid particles added.

[0120] Specifically, the electrode connecting piece 22 and the tab connecting piece 23 are both second metal pieces, the shell 1 is a first metal piece, and the connection between the electrode connecting piece 22 and the shell 1 is provided with the encapsulation part 3.

[0121] It can be understood that the metal materials of the electrode connecting piece 22 and the shell 1 are different. By arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the shell 1, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the shell 1 from contacting other substances, so that the connection between the electrode connecting piece 22 and the shell 1, i.e., the connection between different metal materials, is not prone to corrosion, the connection stability of the electrode connecting piece 22 and the shell 1 is improved, and the shell 1 can be stably connected to the tab by the connecting piece 2.

[0122] Specifically, the electrode connecting piece 22 and the shell 1 are both second metal pieces, the tab connecting piece 23 is a first metal piece, and the connection between the electrode connecting piece 22 and the tab connecting piece 23 is provided with the encapsulation part 3.

[0123] It can be understood that the metal materials of the electrode connecting piece 22 and the tab connecting piece 23 are different. By arranging the encapsulation part 3 at the connection between the electrode connecting piece 22 and the tab connecting piece 23, the encapsulation part 3 can prevent the connection between the electrode connecting piece 22 and the tab connecting piece 23 from contacting other substances, so that the connection between the electrode connecting piece 22 and the tab connecting piece 23, i.e., the connection between different metal materials, is not prone to corrosion, the connection stability of the electrode connecting piece 22 and the tab connecting piece 23 is improved, the structural stability of the connecting piece 2 is improved, and the shell 1 can be stably connected to the tab by the connecting piece 2.

[0124] Exemplarily, the electrode assembly at least includes a winding core.

[0125] According to the second aspect of the embodiments of the present application, the battery includes the above-mentioned battery.

[0126] According to the battery of the embodiments of the present application, the accommodating groove 234 can function as a limiting part, so that one of the tab connecting piece 23 and the electrode connecting piece 22 can limit the other one of the tab connecting piece 23 and the electrode connecting piece 22, the connection stability of the tab connecting piece 23 and the electrode connecting piece 22 is improved, and the structural stability of the battery itself is further improved.

[0127] It should be noted that the electric device can be a vehicle, an aircraft, or a household appliance. It should be noted that the foregoing is only an example of the electric device, and does not specially limit the electric device.

[0128] The above describes the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manner and application range can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery, characterized by, The battery comprises: a shell; an electrode connecting piece connected with the shell of the battery; a tab connecting piece connecting the electrode connecting piece and the tab of the battery; one of the tab connecting piece and the electrode connecting piece is formed with a receiving groove, and the other of the tab connecting piece and the electrode connecting piece is at least partially inserted into the receiving groove.

2. The battery of claim 1, wherein, The other of the tab connecting piece and the electrode connecting piece has a body inserted into the receiving groove.

3. The battery of claim 1, wherein, The other of the tab connecting piece and the electrode connecting piece is formed with a protrusion latched in the receiving groove.

4. The battery of claim 1, wherein, The receiving groove comprises a first receiving groove and a second receiving groove, the tab connecting piece is formed with the first receiving groove, at least part of the electrode connecting piece is inserted into the first receiving groove, the electrode connecting piece is formed with the second receiving groove, and at least part of the tab connecting piece is inserted into the second receiving groove.

5. The battery of claim 1, wherein, The electrode connecting piece comprises a first connecting section and a second connecting section, the second connecting section connects the first connecting section and the shell, and the first connecting section is connected with the tab connecting piece; wherein, one of the tab connecting piece and the first connecting section is formed with a receiving groove, and the other of the tab connecting piece and the first connecting section is at least partially inserted into the receiving groove.

6. The battery of claim 1, wherein, The tab connecting piece comprises a first tab connecting piece and a second tab connecting piece, the first tab connecting piece connects the second tab connecting piece and the electrode connecting piece, and the second tab connecting piece is used for connecting the tab; one of the first tab connecting piece and the electrode connecting piece is formed with the receiving groove, and the other of the first tab connecting piece and the electrode connecting piece is at least partially inserted into the receiving groove.

7. The battery of claim 6, wherein, The first tab connecting piece is formed with the receiving groove, and the electrode connecting piece is inserted into the receiving groove.

8. The battery of claim 7, wherein, The receiving groove has a groove depth of E14, and E14≥10μm.

9. The battery of claim 7, wherein, The shortest distance between one side of the electrode connecting piece facing the side wall surface of the receiving groove and the side wall surface of the receiving groove is E17, and E17≥0.2mm.

10. The battery of claim 7, wherein, The first tab connecting piece comprises oppositely arranged first and second sides, the first side of the first tab connecting piece is formed with the receiving groove, and the second side of the first tab connecting piece is provided with an encapsulation part.

11. The battery of claim 10, wherein, The height of the encapsulation part along the axial direction of the shell is E1, and E1≥0.4mm.

12. The battery of any one of claims 1 to 11, wherein, The battery further comprises an encapsulation part, the encapsulation part is arranged at least part of the electrode connecting piece; and / or, the encapsulation part is arranged at least part of the tab connecting piece; and / or, the encapsulation part is arranged at the connection between the tab connecting piece and the electrode connecting piece.

13. The battery of claim 12, wherein, The tab connecting piece is formed with the receiving groove, the electrode connecting piece is inserted into the receiving groove, a gap is arranged between the electrode connecting piece and the side wall surface of the receiving groove, and at least part of the encapsulation part is arranged in the gap.

14. The battery of claim 13, wherein, The groove depth of the receiving groove is smaller than the thickness of the electrode connecting piece.

15. The battery of claim 12, wherein, The electrode connecting piece is formed with a receiving groove, the tab connecting piece is inserted into the receiving groove, a gap is formed between the tab connecting piece and the side wall surface of the receiving groove, and at least part of the encapsulation portion is arranged in the gap.

16. The battery of claim 15, wherein, The receiving groove has a groove depth less than the thickness of the tab connecting piece.

17. The battery of claim 12, wherein, The encapsulation portion is arranged at the groove opening of the receiving groove.

18. The battery of claim 12, wherein, The tab connecting piece has a bent structure, and the encapsulation portion is arranged at the bent portion of the tab connecting piece.

19. An electrical device, characterized by A battery comprising the electrode as claimed in any one of claims 1 to 18.

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